Colloids and Surfaces A: Physicochemical and Engineering Aspects最新文献_第9页

Thermally enhanced self-healing integral superhydrophobic concrete 热增强自修复整体超疏水混凝土

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-05-20 Epub Date: 2026-02-02 DOI: 10.1016/j.colsurfa.2026.139813

Mingzhong Wei , Qi Zhang , Yuzhen Zhao , Jiandong Liang , Jiale Ma , Song Ding , Yanni Chen , Sirui Xu , Wenxin Wang , Haiyang Zhan , Qi Chen

Superhydrophobic concrete demonstrates exceptional promise for self-cleaning and corrosion-resistant applications owing to its superior water repellency. Despite significant advances, superhydrophobic performance failure persists due to micro/nano structural damage and thermal degradation of low-surface-energy substances. Herein, we developed a self-healing integral superhydrophobic concrete (SISC). When exposed to a high-temperature environment, internal low-surface-energy substances within SISC decompose and form enriched spherical nanoparticles on the surface. This process not only preserves its superhydrophobicity but significantly enhances it, endowing the SISC with unprecedented repellency towards hot water and oil. Remarkably, even if SISC loses its superhydrophobicity due to the complete decomposition of its surface substances, SISC can still achieve autonomous recovery of its superhydrophobic function through reconfiguration and modification of low-surface-energy substances triggered by heating-induced decomposition and migration of internal components. Moreover, the integral superhydrophobicity of SISC fundamentally overcomes the intrinsic limitation of conventional coatings, which suffer from superhydrophobicity failure due to microstructural collapse caused by mechanical abrasion. This self-healing integrated superhydrophobic strategy establishes a new paradigm for fabricating durable and mechanically robust superhydrophobic concrete.

超疏水混凝土由于其优越的拒水性，在自清洁和耐腐蚀应用方面表现出了非凡的前景。尽管取得了重大进展，但由于微/纳米结构损伤和低表面能物质的热降解，超疏水性能失效仍然存在。在此，我们开发了一种自修复的整体超疏水混凝土（SISC）。当暴露在高温环境中时，SISC内部的低表面能物质会分解并在表面形成富集的球形纳米颗粒。这个过程不仅保留了它的超疏水性，而且显著增强了它的超疏水性，赋予了SISC前所未有的对热水和油的拒水性。值得注意的是，即使由于其表面物质完全分解而失去其超疏水功能，SISC仍然可以通过加热诱导分解和内部组分迁移引发的低表面能物质的重新配置和修饰，实现其超疏水功能的自主恢复。此外，SISC的整体超疏水性从根本上克服了传统涂层由于机械磨损导致微观结构崩溃而导致超疏水性失效的固有局限性。这种自我修复的综合超疏水策略为制造耐用和机械坚固的超疏水混凝土建立了新的范例。

{"title":"Thermally enhanced self-healing integral superhydrophobic concrete","authors":"Mingzhong Wei , Qi Zhang , Yuzhen Zhao , Jiandong Liang , Jiale Ma , Song Ding , Yanni Chen , Sirui Xu , Wenxin Wang , Haiyang Zhan , Qi Chen","doi":"10.1016/j.colsurfa.2026.139813","DOIUrl":"10.1016/j.colsurfa.2026.139813","url":null,"abstract":"<div><div>Superhydrophobic concrete demonstrates exceptional promise for self-cleaning and corrosion-resistant applications owing to its superior water repellency. Despite significant advances, superhydrophobic performance failure persists due to micro/nano structural damage and thermal degradation of low-surface-energy substances. Herein, we developed a self-healing integral superhydrophobic concrete (SISC). When exposed to a high-temperature environment, internal low-surface-energy substances within SISC decompose and form enriched spherical nanoparticles on the surface. This process not only preserves its superhydrophobicity but significantly enhances it, endowing the SISC with unprecedented repellency towards hot water and oil. Remarkably, even if SISC loses its superhydrophobicity due to the complete decomposition of its surface substances, SISC can still achieve autonomous recovery of its superhydrophobic function through reconfiguration and modification of low-surface-energy substances triggered by heating-induced decomposition and migration of internal components. Moreover, the integral superhydrophobicity of SISC fundamentally overcomes the intrinsic limitation of conventional coatings, which suffer from superhydrophobicity failure due to microstructural collapse caused by mechanical abrasion. This self-healing integrated superhydrophobic strategy establishes a new paradigm for fabricating durable and mechanically robust superhydrophobic concrete.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"737 ","pages":"Article 139813"},"PeriodicalIF":5.4,"publicationDate":"2026-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146171337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Prolonging the durability of viscosity reduction in waxy crude oils: The role of energy input and field strength in high-voltage electric treatment 延长含蜡原油降粘的耐久性：高压电处理中能量输入和场强的作用

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-05-20 Epub Date: 2026-02-07 DOI: 10.1016/j.colsurfa.2026.139887

Yiwei Xie , Hongying Li , Qibing Li , Chaoyue Zhang , Jinling Zhang , Yang Su , Jiabao Kang , Zhaoming Yang , Huai Su , Zhongli Ji , Jinjun Zhang

High-voltage electric treatment is an emerging technique to improve the cold flowability of waxy crudes. Although previous research has identified input energy density as the essential parameter governing viscosity reduction, its impact on the durability of this effect remains unclear. This study systematically investigates the effects of energy input and field strength on the duration of viscosity reduction in two waxy oils, using in-situ rheological and impedance measurements. Results reveal a three-stage evolution of viscosity reduction duration with increasing energy input. Before reaching the energy density threshold for maximum viscosity reduction, both the viscosity reduction and its duration increase linearly with input energy. Beyond this threshold, the viscosity reduction plateaus while its duration continues to increase, first moderately and then sharply. Impedance measurements show no change beyond the energy threshold, suggesting the enhanced durability does not result from increased adsorption of charged particles. According to the EDLVO theory, the applied energy drives charged particles to sequentially overcome the secondary and the primary energy barriers, adsorbing onto wax particle surfaces. This transition from shallow to stable adsorption enhances the durability of viscosity reduction. Furthermore, under the same energy input, higher field strength significantly prolongs the duration of viscosity reduction due to the stronger dielectrophoretic force, which imparts greater kinetic energy to charged particles, enabling them to overcome energy barriers more effectively. Overall, this study advances the understanding of the electrorheological effect in waxy oils and offers valuable insights for designing and optimizing industrial-scale electric treatment devices.

高压电处理是提高含蜡原油冷流动性的新兴技术。虽然先前的研究已经确定输入能量密度是控制粘度降低的基本参数，但其对这种效果的耐久性的影响尚不清楚。本研究系统地研究了能量输入和场强对两种含蜡油降粘持续时间的影响，采用原位流变学和阻抗测量。结果表明，黏度降低持续时间随能量输入的增加呈三个阶段演化。在达到最大降粘能量密度阈值之前，降粘量和持续时间均随输入能量线性增加。超过这个阈值，粘度降低趋于平稳，而持续时间继续增加，先是适度，然后急剧增加。阻抗测量显示，在能量阈值之外没有变化，这表明耐久性的增强不是由于带电粒子吸附的增加。根据EDLVO理论，施加的能量驱动带电粒子依次克服二次和一次能量障碍，吸附在蜡颗粒表面。这种从浅层吸附到稳定吸附的转变增强了降粘的耐久性。此外，在相同的能量输入下，更高的场强显著延长了粘度降低的持续时间，因为更强的介电泳力赋予带电粒子更大的动能，使它们能够更有效地克服能量障碍。总的来说，这项研究促进了对含蜡油的电流变效应的理解，并为设计和优化工业规模的电处理装置提供了有价值的见解。

{"title":"Prolonging the durability of viscosity reduction in waxy crude oils: The role of energy input and field strength in high-voltage electric treatment","authors":"Yiwei Xie , Hongying Li , Qibing Li , Chaoyue Zhang , Jinling Zhang , Yang Su , Jiabao Kang , Zhaoming Yang , Huai Su , Zhongli Ji , Jinjun Zhang","doi":"10.1016/j.colsurfa.2026.139887","DOIUrl":"10.1016/j.colsurfa.2026.139887","url":null,"abstract":"<div><div>High-voltage electric treatment is an emerging technique to improve the cold flowability of waxy crudes. Although previous research has identified input energy density as the essential parameter governing viscosity reduction, its impact on the durability of this effect remains unclear. This study systematically investigates the effects of energy input and field strength on the duration of viscosity reduction in two waxy oils, using in-situ rheological and impedance measurements. Results reveal a three-stage evolution of viscosity reduction duration with increasing energy input. Before reaching the energy density threshold for maximum viscosity reduction, both the viscosity reduction and its duration increase linearly with input energy. Beyond this threshold, the viscosity reduction plateaus while its duration continues to increase, first moderately and then sharply. Impedance measurements show no change beyond the energy threshold, suggesting the enhanced durability does not result from increased adsorption of charged particles. According to the EDLVO theory, the applied energy drives charged particles to sequentially overcome the secondary and the primary energy barriers, adsorbing onto wax particle surfaces. This transition from shallow to stable adsorption enhances the durability of viscosity reduction. Furthermore, under the same energy input, higher field strength significantly prolongs the duration of viscosity reduction due to the stronger dielectrophoretic force, which imparts greater kinetic energy to charged particles, enabling them to overcome energy barriers more effectively. Overall, this study advances the understanding of the electrorheological effect in waxy oils and offers valuable insights for designing and optimizing industrial-scale electric treatment devices.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"737 ","pages":"Article 139887"},"PeriodicalIF":5.4,"publicationDate":"2026-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185287","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The preparation of the trihydrazinotriazine-based flexible covalent organic frameworks for fluorescence detecting 2,4,6-trinitrophenol and iodide ions 荧光检测2,4,6-三硝基苯酚和碘离子的三肼基柔性共价有机骨架的制备

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-05-20 Epub Date: 2026-02-07 DOI: 10.1016/j.colsurfa.2026.139880

Qi Peng

The hydrazone-linked COFs prepared from 2,4,6-trihydrazino-1,3,5-triazine (THTA) have a variety of active sites with analytes. However, there are no reports about them as fluorescent sensors. Herein, the THTA-based flexible COFs were synthesized by Shiff-base reaction of (THTA) with flexible knots, hexa(4-formyl-phenoxy)cyclotriphosphazene (NOP−6 −CHO) and 2,4,6-tris-(4-formylphenoxy)-1,3,5-triazine (TPT−3 −CHO). HTHTA and TTHTA possess the large Brunauer-Emmett-Teller (BET)-specific areas of 1512 and 1610 m² g⁻¹, certain crystallization and excellent thermal stability. HTHTA and TTHTA have good fluorescent performance in both dispersion and solid states, and can be used for fluorescence sensing of 2,4,6-trinitrophenol (TNP) and iodide ions with high sensitivity and selectivity. This is the first application of hydrazone-linked flexible COFs for fluorescence sensing iodide ions. Fluorescence quenching constants (K_SV) of HTHTA and TTHTA are 1.86 × 10⁴ and 1.26 × 10⁴ M⁻¹ for TNP, 1.49 × 10⁴ and 1.25 × 10⁴ M⁻¹ for iodide ions, respectively. Fluorescence quenching effect of TNP on HTHTA and TTHTA is the result of photo-induced electron transfer process. Fluorescence quenching of the THTA-based flexible COFs by iodide ions is attributed to the heavy atom effect and inner filter effect (IFE). HTHTA and TTHTA can be used to detect iodide ions in wheat flour, and TNP in river sand with good recovery.

由2,4,6-三肼-1,3,5-三嗪（THTA）制备的腙连接COFs具有多种活性位点。然而，没有关于它们作为荧光传感器的报道。本文通过（THTA）与柔性结、六（4-甲酰基-苯氧基）环三磷腈（NOP−6 −CHO）和2,4,6-三-（4-甲酰基-苯氧基）-1,3,5-三嗪（TPT−3 −CHO）的shift -碱反应合成了基于THTA的柔性COFs。HTHTA和TTHTA具有较大的布鲁诺-埃米特-泰勒（BET）比表面积1512和1610 m2 g−1，具有一定的结晶性和优异的热稳定性。HTHTA和ththta在分散态和固态下均具有良好的荧光性能，可用于2,4,6-三硝基苯酚（TNP）和碘离子的荧光传感，具有较高的灵敏度和选择性。这是首次应用腙连接柔性COFs荧光传感碘离子。HTHTA和TTHTA的荧光猝灭常数（KSV）对TNP分别为1.86 × 104和1.26 × 104 M−1，对碘离子分别为1.49 × 104和1.25 × 104 M−1。TNP对HTHTA和TTHTA的荧光猝灭作用是光诱导电子转移过程的结果。碘离子对thta基柔性COFs的荧光猝灭主要归因于重原子效应和内滤效应（IFE）。HTHTA和ththta可用于检测小麦粉中的碘离子和河沙中的TNP，且回收率好。

{"title":"The preparation of the trihydrazinotriazine-based flexible covalent organic frameworks for fluorescence detecting 2,4,6-trinitrophenol and iodide ions","authors":"Qi Peng","doi":"10.1016/j.colsurfa.2026.139880","DOIUrl":"10.1016/j.colsurfa.2026.139880","url":null,"abstract":"<div><div>The hydrazone-linked COFs prepared from 2,4,6-trihydrazino-1,3,5-triazine (THTA) have a variety of active sites with analytes. However, there are no reports about them as fluorescent sensors. Herein, the THTA-based flexible COFs were synthesized by Shiff-base reaction of (THTA) with flexible knots, hexa(4-formyl-phenoxy)cyclotriphosphazene (NOP−6 −CHO) and 2,4,6-tris-(4-formylphenoxy)-1,3,5-triazine (TPT−3 −CHO). HTHTA and TTHTA possess the large Brunauer-Emmett-Teller (BET)-specific areas of 1512 and 1610 m<sup>2</sup> g<sup>−1</sup>, certain crystallization and excellent thermal stability. HTHTA and TTHTA have good fluorescent performance in both dispersion and solid states, and can be used for fluorescence sensing of 2,4,6-trinitrophenol (TNP) and iodide ions with high sensitivity and selectivity. This is the first application of hydrazone-linked flexible COFs for fluorescence sensing iodide ions. Fluorescence quenching constants (K<sub>SV</sub>) of HTHTA and TTHTA are 1.86 × 10<sup>4</sup> and 1.26 × 10<sup>4</sup> M<sup>−1</sup> for TNP, 1.49 × 10<sup>4</sup> and 1.25 × 10<sup>4</sup> M<sup>−1</sup> for iodide ions, respectively. Fluorescence quenching effect of TNP on HTHTA and TTHTA is the result of photo-induced electron transfer process. Fluorescence quenching of the THTA-based flexible COFs by iodide ions is attributed to the heavy atom effect and inner filter effect (IFE). HTHTA and TTHTA can be used to detect iodide ions in wheat flour, and TNP in river sand with good recovery.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"737 ","pages":"Article 139880"},"PeriodicalIF":5.4,"publicationDate":"2026-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

In-situ synergistic biomimetic construction of a ChOx@Fe-ZIF-8/SA nanoreactor for three-enzyme cascade acetylcholine detection 三酶级联乙酰胆碱检测ChOx@Fe-ZIF-8/SA纳米反应器的原位协同仿生构建

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-05-20 Epub Date: 2026-01-30 DOI: 10.1016/j.colsurfa.2026.139793

Xiang-Lei Chang , Wen Peng , Tharcisse Gatera , Ying Zhang , Tian Chai , Wei-Feng Wang , Jun-Li Yang

As a pivotal neurotransmitter, monitoring acetylcholine (ACh) levels holds significant implications for neurological diseases research. However, the inherent instability of natural enzymes and insufficient synergistic efficiency within multi-enzyme cascade systems severely constrain their practical application. This study constructed the ChOx@Fe-ZIF-8/SA nanoreactor with triple-enzyme activity based on a synergistic strategy integrating simulated enzyme activity and enzyme immobilization. The modulator sodium alginate (SA) modified ZIF-8 to enhance the acetylcholinesterase (AChE)-like activity while introducing peroxidase (POD)-like activity through Fe^3 + doping. Meanwhile, the ChOx@Fe-ZIF-8/SA nanoreactor was prepared in one step by the in-situ encapsulation method to immobilize choline oxidase (ChOx), streamlining the synthesis process. The nanoreactor demonstrated outstanding stability and reusability compared to natural enzymes. Furthermore, the nanoreactor achieved a detection limit of 1.52 μM for ACh with excellent interference resistance. The nanoreactor has been applied to human serum samples, indicating its potential in complex biological samples. This work offered a novel approach for developing integrated bionic cascade systems for complex biosensing applications.

乙酰胆碱（ACh）作为一种关键的神经递质，监测其水平对神经系统疾病的研究具有重要意义。然而，天然酶固有的不稳定性和多酶级联系统协同效率不足严重制约了它们的实际应用。本研究基于模拟酶活性与酶固定化相结合的协同策略，构建了具有三酶活性的ChOx@Fe-ZIF-8/SA纳米反应器。调节剂海藻酸钠（SA）通过Fe3 +掺杂提高ZIF-8的乙酰胆碱酯酶（AChE）样活性，同时引入过氧化物酶（POD）样活性。同时，采用原位包封法制备了ChOx@Fe-ZIF-8/SA纳米反应器，以固定胆碱氧化酶（ChOx），简化了合成工艺。与天然酶相比，纳米反应器表现出优异的稳定性和可重用性。此外，该纳米反应器对乙酰胆碱的检出限为1.52 μM，具有良好的抗干扰性。该纳米反应器已应用于人血清样品，表明其在复杂生物样品中的潜力。这项工作为开发用于复杂生物传感应用的集成仿生级联系统提供了一种新的方法。

{"title":"In-situ synergistic biomimetic construction of a ChOx@Fe-ZIF-8/SA nanoreactor for three-enzyme cascade acetylcholine detection","authors":"Xiang-Lei Chang , Wen Peng , Tharcisse Gatera , Ying Zhang , Tian Chai , Wei-Feng Wang , Jun-Li Yang","doi":"10.1016/j.colsurfa.2026.139793","DOIUrl":"10.1016/j.colsurfa.2026.139793","url":null,"abstract":"<div><div>As a pivotal neurotransmitter, monitoring acetylcholine (ACh) levels holds significant implications for neurological diseases research. However, the inherent instability of natural enzymes and insufficient synergistic efficiency within multi-enzyme cascade systems severely constrain their practical application. This study constructed the ChOx@Fe-ZIF-8/SA nanoreactor with triple-enzyme activity based on a synergistic strategy integrating simulated enzyme activity and enzyme immobilization. The modulator sodium alginate (SA) modified ZIF-8 to enhance the acetylcholinesterase (AChE)-like activity while introducing peroxidase (POD)-like activity through Fe<sup>3 +</sup> doping. Meanwhile, the ChOx@Fe-ZIF-8/SA nanoreactor was prepared in one step by the in-situ encapsulation method to immobilize choline oxidase (ChOx), streamlining the synthesis process. The nanoreactor demonstrated outstanding stability and reusability compared to natural enzymes. Furthermore, the nanoreactor achieved a detection limit of 1.52 <em>μ</em>M for ACh with excellent interference resistance. The nanoreactor has been applied to human serum samples, indicating its potential in complex biological samples. This work offered a novel approach for developing integrated bionic cascade systems for complex biosensing applications.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"737 ","pages":"Article 139793"},"PeriodicalIF":5.4,"publicationDate":"2026-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146171075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cellulose nanocrystal carrier with schiff base-based responsive drug release 席夫碱反应性释药的纤维素纳米晶载体

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-05-20 Epub Date: 2026-01-20 DOI: 10.1016/j.colsurfa.2026.139652

ChengLin Li , Youlu Chu , Shengzhe Zhang , Wenqian Zhang , Yi Chen , Lei Zhang , Huining Xiao , Weibing Wu

The efficacy of conventional chemotherapy is often compromised by nonspecific distribution and severe systemic toxicity. To mitigate these issues, we developed a pH-responsive drug delivery platform based on cellulose nanocrystals (CNC), which employed a reversible imine bond mechanism for controlled drug release. A one-step periodate oxidation successfully converted CNC into dialdehyde cellulose (DAC), achieving concurrent precise size control (40–80 nm) and introduction of surface aldehyde functionalities. Subsequently, a stepwise functionalization approach was employed: amino-polyethylene glycol (PEG-NH₂) was first grafted onto the DAC surface via a Schiff base reaction, followed by selective reduction to stabilize the linkage, thereby yielding a highly stable and dispersible DAC-PEG intermediate. The remaining aldehyde groups were then utilized to covalently conjugate doxorubicin (DOX) through pH-labile imine bonds, culminating in the final DOX-DAC-PEG nanocarrier. The resulting nanoparticles exhibited characteristics favorable for tumor accumulation, including a near-neutral Zeta potential of −4 mV and a hydrodynamic diameter below 100 nm. More importantly, the system demonstrated remarkable pH-responsive drug release behavior, showing a sustained and minimal release under physiological conditions (pH 7.4), while the release was markedly accelerated in simulated tumor microenvironment (pH 5.5) and lysosomal conditions (pH 3.0) respectively. Cytotoxicity assays confirmed the excellent biocompatibility of the blank DAC-PEG carrier (>90 % cell viability after 24 h). In contrast, the drug-loaded DOX-DAC-PEG nanoparticles effectively leveraged the intracellular acidic milieu to trigger DOX release, exerting significant time- and concentration-dependent inhibitory effects on 4T1 cancer cell proliferation, with a notably low IC₅₀ value of 2.5 μΜ at 48 h.

常规化疗的疗效往往受到非特异性分布和严重的全身毒性的影响。为了缓解这些问题，我们开发了一种基于纤维素纳米晶体（CNC）的ph响应药物递送平台，该平台采用可逆亚胺键机制来控制药物释放。一步高酸盐氧化成功地将CNC转化为双醛纤维素（DAC），同时实现精确的尺寸控制（40-80 nm）和引入表面醛功能。随后，采用逐步功能化方法：首先通过希夫碱反应将氨基聚乙二醇（PEG-NH2）接枝到DAC表面，然后进行选择性还原以稳定连接，从而产生高度稳定和分散的DAC- peg中间体。然后利用剩余的醛基团通过ph不稳定的亚胺键共价偶联阿霉素（DOX），最终形成DOX- dac - peg纳米载体。所得纳米颗粒表现出有利于肿瘤积聚的特性，包括- 4 mV的近中性Zeta电位和低于100 nm的水动力直径。更重要的是，该系统表现出了显著的pH响应性药物释放行为，在生理条件下（pH 7.4）表现出持续和最小的释放，而在模拟肿瘤微环境（pH 5.5）和溶酶体条件下（pH 3.0）释放明显加速。细胞毒性实验证实空白DAC-PEG载体具有良好的生物相容性（24 h后细胞存活率为90 %）。相比之下，载药DOX- dac - peg纳米颗粒有效地利用细胞内酸性环境触发DOX释放，对4T1癌细胞增殖产生显著的时间和浓度依赖性抑制作用，在48 h时IC50值显著降低，为2.5 μΜ。

{"title":"Cellulose nanocrystal carrier with schiff base-based responsive drug release","authors":"ChengLin Li , Youlu Chu , Shengzhe Zhang , Wenqian Zhang , Yi Chen , Lei Zhang , Huining Xiao , Weibing Wu","doi":"10.1016/j.colsurfa.2026.139652","DOIUrl":"10.1016/j.colsurfa.2026.139652","url":null,"abstract":"<div><div>The efficacy of conventional chemotherapy is often compromised by nonspecific distribution and severe systemic toxicity. To mitigate these issues, we developed a pH-responsive drug delivery platform based on cellulose nanocrystals (CNC), which employed a reversible imine bond mechanism for controlled drug release. A one-step periodate oxidation successfully converted CNC into dialdehyde cellulose (DAC), achieving concurrent precise size control (40–80 nm) and introduction of surface aldehyde functionalities. Subsequently, a stepwise functionalization approach was employed: amino-polyethylene glycol (PEG-NH<sub>2</sub>) was first grafted onto the DAC surface via a Schiff base reaction, followed by selective reduction to stabilize the linkage, thereby yielding a highly stable and dispersible DAC-PEG intermediate. The remaining aldehyde groups were then utilized to covalently conjugate doxorubicin (DOX) through pH-labile imine bonds, culminating in the final DOX-DAC-PEG nanocarrier. The resulting nanoparticles exhibited characteristics favorable for tumor accumulation, including a near-neutral Zeta potential of −4 mV and a hydrodynamic diameter below 100 nm. More importantly, the system demonstrated remarkable pH-responsive drug release behavior, showing a sustained and minimal release under physiological conditions (pH 7.4), while the release was markedly accelerated in simulated tumor microenvironment (pH 5.5) and lysosomal conditions (pH 3.0) respectively. Cytotoxicity assays confirmed the excellent biocompatibility of the blank DAC-PEG carrier (>90 % cell viability after 24 h). In contrast, the drug-loaded DOX-DAC-PEG nanoparticles effectively leveraged the intracellular acidic milieu to trigger DOX release, exerting significant time- and concentration-dependent inhibitory effects on 4T1 cancer cell proliferation, with a notably low IC<sub>50</sub> value of 2.5 μΜ at 48 h.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"737 ","pages":"Article 139652"},"PeriodicalIF":5.4,"publicationDate":"2026-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146045185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Gelatin-based eutectogel for water-triggered release of tebuconazole in humid and rainy agricultural environments 明胶基共聚物用于湿润多雨农业环境中苯康唑的水触发释放

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-05-20 Epub Date: 2026-01-30 DOI: 10.1016/j.colsurfa.2026.139796

Honglei Zhao, Liya Zhang, Zeyi Wang, Shumei Zhai, Jingcheng Hao

Spray application of pesticides increases the air humidity and promotes the spread of moisture-loving diseases. Existing hydrogels used for pesticides local applications cannot simultaneously meet the requirements of improving loading amount, reducing costs, and increasing utilization of pesticides in humid and rainy conditions. In this work, a gelatin-based eutectogel was developed using betaine (BET) and ethylene glycol (EG) as the deep eutectic solvent (DES) system for tebuconazole (Teb) delivery. The gelatin/BET-EG eutectogel owned a Teb loading capacity 89.4 times higher than that of a gelatin hydrogel. The cumulative release rate of Teb in water reached 77 % after 7 days, which followed first-order kinetic equation, and the DES in gelatin/BET-EG eutectogel was confirmed to be replaced by water. Under 70 % relative humidity and 300 wt% water infiltration conditions, the highest release rates of Teb were 47 % and 55 %, respectively. The release rates of Teb in gels suspended in the air and placed on the soil surface were 22 % and 42 % respectively after 10 min of simulated rainfall. Further research confirmed the influence by loading amount, pH, temperature, and soil type on water-triggered Teb release. The eutectogel degraded rapidly within 10 days in soil and showed negligible toxicity to Chlorella vulgaris (72 h, IC₅₀ = 21.23 g/L). These findings highlighted the potential of gelatin/BET-EG eutectogel as a green and efficient platform for pesticide delivery in sustainable agriculture.

喷洒农药增加了空气湿度，促进了喜湿疾病的传播。现有用于农药局部施用的水凝胶不能同时满足湿润多雨条件下提高农药装药量、降低成本和提高农药利用率的要求。本研究以甜菜碱（BET）和乙二醇（EG）为深度共溶溶剂（DES）体系，制备了一种以明胶为基础的共聚物，用于替布康唑（Teb）的递送。明胶/ β - eg共聚物的Teb负载能力比明胶水凝胶高89.4倍。7 d后，Teb在水中的累积释放率达到77 %，符合一级动力学方程，证实明胶/ β - eg共聚物中的DES被水取代。在相对湿度为70 %和水分入渗为300 wt%的条件下，Teb的最高释放率分别为47 %和55 %。模拟降雨10 min后，悬浮在空气中的凝胶和放置在土壤表面的凝胶中Teb的释放率分别为22 %和42 %。进一步的研究证实了负荷量、pH、温度和土壤类型对水触发的Teb释放的影响。共聚物在土壤中10天内迅速降解，对小球藻的毒性可以忽略不计（72 h, IC₅₀= 21.23 g/L）。这些发现突出了明胶/BET-EG共聚物作为可持续农业中绿色高效农药输送平台的潜力。

{"title":"Gelatin-based eutectogel for water-triggered release of tebuconazole in humid and rainy agricultural environments","authors":"Honglei Zhao, Liya Zhang, Zeyi Wang, Shumei Zhai, Jingcheng Hao","doi":"10.1016/j.colsurfa.2026.139796","DOIUrl":"10.1016/j.colsurfa.2026.139796","url":null,"abstract":"<div><div>Spray application of pesticides increases the air humidity and promotes the spread of moisture-loving diseases. Existing hydrogels used for pesticides local applications cannot simultaneously meet the requirements of improving loading amount, reducing costs, and increasing utilization of pesticides in humid and rainy conditions. In this work, a gelatin-based eutectogel was developed using betaine (BET) and ethylene glycol (EG) as the deep eutectic solvent (DES) system for tebuconazole (Teb) delivery. The gelatin/BET-EG eutectogel owned a Teb loading capacity 89.4 times higher than that of a gelatin hydrogel. The cumulative release rate of Teb in water reached 77 % after 7 days, which followed first-order kinetic equation, and the DES in gelatin/BET-EG eutectogel was confirmed to be replaced by water. Under 70 % relative humidity and 300 wt% water infiltration conditions, the highest release rates of Teb were 47 % and 55 %, respectively. The release rates of Teb in gels suspended in the air and placed on the soil surface were 22 % and 42 % respectively after 10 min of simulated rainfall. Further research confirmed the influence by loading amount, pH, temperature, and soil type on water-triggered Teb release. The eutectogel degraded rapidly within 10 days in soil and showed negligible toxicity to <em>Chlorella vulgaris</em> (72 h, IC₅₀ = 21.23 g/L). These findings highlighted the potential of gelatin/BET-EG eutectogel as a green and efficient platform for pesticide delivery in sustainable agriculture.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"737 ","pages":"Article 139796"},"PeriodicalIF":5.4,"publicationDate":"2026-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146076405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structure and surface of Ca10-xBix(PO4)6(OH)2-xOx solid solutions for light-driven photocatalytic degradation of oxytetracycline 驱动光催化降解土霉素的Ca10-xBix(PO4)6(OH)2-xOx固溶体的结构和表面

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-05-20 Epub Date: 2026-01-30 DOI: 10.1016/j.colsurfa.2026.139776

S. Fatine , J. Khmiyas , A. Hami , L. Sbabou , A. Laghzizil

This study highlights the effect of oxygen vacancies generated by the substitution of Ca²⁺ with Bi³⁺ in Ca_10-xBi_x(PO₄)₆(OH)_2-xO_x apatites for photocatalytic degradation of oxytetracycline (OTC) under UV and visible light. Characterizations reveal that the introduction of Bi³⁺ induces the formation of structural oxygen vacancies and modifies the electronic properties, with a substitution limit fixed at x = 0.3. Photocatalytic tests show that the controlled presence of these vacancies improves charge separation and the generation of reactive species, allowing a complete OTC degradation with x = 0.1. These results demonstrate the key role of Bi substitution and the formed oxygen vacancies in the design of efficient apatite-based photocatalysts.

本研究重点研究了用Bi +取代Ca10-xBix(PO4)6(OH)2-xOx磷灰石中Ca 2 +产生的氧空位在紫外和可见光下对土霉素（OTC）光催化降解的影响。表征表明，Bi³+的引入诱导了结构氧空位的形成，改变了电子性质，取代极限固定在x = 0.3。光催化试验表明，控制这些空位的存在可以改善电荷分离和活性物质的产生，从而使x = 0.1的OTC完全降解。这些结果证明了铋取代和形成的氧空位在设计高效磷灰石基光催化剂中的关键作用。

引用次数: 0

Sterically hindered organosilicon surfactants: Synthesis and surface properties in aqueous solutions 位阻有机硅表面活性剂：在水溶液中的合成和表面性质

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-05-20 Epub Date: 2026-02-10 DOI: 10.1016/j.colsurfa.2026.139915

Chen-Qiang Deng , Peng-Pai Liu , Ruoshi Chen , Jin Deng , Jinqing Jiao , Lin Wang , Guanwen Zhang , Xuqing Lang , Tian-Jun Gong

A series of mixed double-tail silicone-based surfactants by integrating sterically hindered siloxane fragments with various alkyl hydrophobic chains were synthesized. The molecular structures of these surfactants were comfirmed by ¹H and ¹ ³C NMR, FT-IR spectra, and HRMS-ESI. Their behaviors in aqueous solutions were systematically investigated through surface tensiometry, electrical conductivity, transmission electron microscopy, dynamic light scattering, and molecular dynamics simulations. The mixed double-tail silicone-based surfactants demonstrated excellent surface activity and could reduce the surface tension of water to as low as 16.9 mN·m⁻¹ at the critical micelle concentration. The adsorption and aggregation behavior of these surfactants were assessed by the measurement of adsorption efficiency, minimum average molecular area, and thermodynamic parameters. The results revealed that micellization is a spontaneous process, with the driving force transitioning from an entropy-dominated to an enthalpy-dominated mechanism as the hydrophobic alkyl chain length increased. The foamability test showed that the silicone-based surfactant bearing n-hexyl alkyl chains displayed superior foaming ability, achieving a maximum foam volume of 440 mL at 0.5 wt%. Transmission electron microscopy results demonstrated that these surfactant molecules self-assembled into spherical aggregates. Moreover, the size of the aggregates was determined to be in the range from 10 to 160 nm by dynamic light scattering. Molecular dynamics simulations confirmed that the enhanced hydrophobic effect is the dominant factor driving molecular aggregation. These findings highlighted the potential of silicone-based surfactants as environmentally friendly alternatives to fluorocarbon surfactants in fire-fighting.

合成了一系列由位阻硅氧烷片段与各种烷基疏水链整合而成的混合双尾硅基表面活性剂。通过¹H和¹ ³C核磁共振、FT-IR光谱和HRMS-ESI对表面活性剂的分子结构进行了确证。通过表面张力测量、电导率、透射电镜、动态光散射和分子动力学模拟，系统地研究了它们在水溶液中的行为。混合双尾硅基表面活性剂表现出优异的表面活性，在临界胶束浓度下可使水的表面张力低至16.9 mN·m⁻¹ 。通过测定吸附效率、最小平均分子面积和热力学参数来评价这些表面活性剂的吸附和聚集行为。结果表明，胶束化是一个自发过程，随着疏水烷基链长的增加，胶束化的驱动力由熵主导向焓主导转变。泡沫性能测试表明，含正己基烷基链的硅基表面活性剂具有优异的起泡能力，在0.5 wt%的条件下泡沫体积最大可达440 mL。透射电镜结果表明，这些表面活性剂分子自组装成球形聚集体。此外，通过动态光散射确定了聚集体的大小在10 ~ 160 nm之间。分子动力学模拟证实了疏水效应的增强是驱动分子聚集的主要因素。这些发现突出了硅基表面活性剂作为氟碳表面活性剂的环保替代品在消防中的潜力。

{"title":"Sterically hindered organosilicon surfactants: Synthesis and surface properties in aqueous solutions","authors":"Chen-Qiang Deng , Peng-Pai Liu , Ruoshi Chen , Jin Deng , Jinqing Jiao , Lin Wang , Guanwen Zhang , Xuqing Lang , Tian-Jun Gong","doi":"10.1016/j.colsurfa.2026.139915","DOIUrl":"10.1016/j.colsurfa.2026.139915","url":null,"abstract":"<div><div>A series of mixed double-tail silicone-based surfactants by integrating sterically hindered siloxane fragments with various alkyl hydrophobic chains were synthesized. The molecular structures of these surfactants were comfirmed by ¹H and ¹ ³C NMR, FT-IR spectra, and HRMS-ESI. Their behaviors in aqueous solutions were systematically investigated through surface tensiometry, electrical conductivity, transmission electron microscopy, dynamic light scattering, and molecular dynamics simulations. The mixed double-tail silicone-based surfactants demonstrated excellent surface activity and could reduce the surface tension of water to as low as 16.9 mN·m⁻¹ at the critical micelle concentration. The adsorption and aggregation behavior of these surfactants were assessed by the measurement of adsorption efficiency, minimum average molecular area, and thermodynamic parameters. The results revealed that micellization is a spontaneous process, with the driving force transitioning from an entropy-dominated to an enthalpy-dominated mechanism as the hydrophobic alkyl chain length increased. The foamability test showed that the silicone-based surfactant bearing n-hexyl alkyl chains displayed superior foaming ability, achieving a maximum foam volume of 440 mL at 0.5 wt%. Transmission electron microscopy results demonstrated that these surfactant molecules self-assembled into spherical aggregates. Moreover, the size of the aggregates was determined to be in the range from 10 to 160 nm by dynamic light scattering. Molecular dynamics simulations confirmed that the enhanced hydrophobic effect is the dominant factor driving molecular aggregation. These findings highlighted the potential of silicone-based surfactants as environmentally friendly alternatives to fluorocarbon surfactants in fire-fighting.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"737 ","pages":"Article 139915"},"PeriodicalIF":5.4,"publicationDate":"2026-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spreading and adhesion properties of compressed air foam on vertical facades: Effects of gas-liquid ratio and spray angle 压缩空气泡沫在垂直立面上的扩散和粘附性能：气液比和喷射角度的影响

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-05-20 Epub Date: 2026-02-02 DOI: 10.1016/j.colsurfa.2026.139829

Yongkang Guo , Qian Feng , Zhuoxuan Li , Lilong Nie , Agoston Restas , Kaiyuan Li , Linlin Yi

Compressed air foam offers a promising solution to address the current fire risks on building facades. This study investigates the effects of gas-liquid ratio and spray angle on the spreading and adhesion properties of compressed air foam on facades. The results indicate that as the gas-liquid ratio increases from 4:1–15:1, the foam spreading rate decreases by 3 times, while the foam layer thickness increases by 2.4 times. When the spray angle increases from 0° to 90°, the spreading rate decreases by 50 %, while the foam layer thickness increases by 50 %. The foam spreading rate on vertical facades is approximately 5.1 times that on horizontal liquid surfaces. An increase in the gas-liquid ratio results in a more uniform foam structure and up to 1.4 times increase in apparent viscosity. A reduction in the spray angle intensified gravitational shear and disrupted the foam structure, which results in a decrease in apparent viscosity. The gas-liquid ratio and spray angle affect the apparent viscosity of foam by modulating its intrinsic physical properties and externally applied forces, thereby affecting the foam spreading and adhesion properties. Predictive models are developed to estimate the spreading rate (

V_{s}

) and foam layer thickness (

H_{f}

) in relation to the apparent viscosity (

η

), which indicate

V_{s} \propto - 5.23 η

and

H_{f} \propto e^{0.48 η}

.The model predictions providing a theoretical basis for designing the compressed air foam suppression systems for high-rise building facades.

压缩空气泡沫为解决当前建筑立面的火灾风险提供了一个很有前途的解决方案。研究了气液比和喷射角度对压缩空气泡沫在建筑立面上扩散和粘附性能的影响。结果表明：当气液比从4:1增加到15:1时，泡沫铺展速率降低了3倍，泡沫层厚度增加了2.4倍；当喷射角从0°增加到90°时，扩散速率降低了50 %，而泡沫层厚度增加了50 %。泡沫在垂直立面上的扩散速度约为水平液体表面的5.1倍。气液比的增加使泡沫结构更加均匀，表观粘度增加1.4倍。喷射角的减小加剧了重力剪切，破坏了泡沫结构，导致表观粘度的降低。气液比和喷射角度通过调节泡沫的内在物理性质和外力来影响泡沫的表观粘度，从而影响泡沫的扩散和粘附性能。建立了扩散速率Vs和泡沫层厚度Hf与表观粘度η的关系预测模型，结果表明Vs∝−5.23η, Hf∝e0.48η。模型预测结果为高层建筑外立面压缩空气泡沫抑制系统的设计提供了理论依据。

{"title":"Spreading and adhesion properties of compressed air foam on vertical facades: Effects of gas-liquid ratio and spray angle","authors":"Yongkang Guo , Qian Feng , Zhuoxuan Li , Lilong Nie , Agoston Restas , Kaiyuan Li , Linlin Yi","doi":"10.1016/j.colsurfa.2026.139829","DOIUrl":"10.1016/j.colsurfa.2026.139829","url":null,"abstract":"<div><div>Compressed air foam offers a promising solution to address the current fire risks on building facades. This study investigates the effects of gas-liquid ratio and spray angle on the spreading and adhesion properties of compressed air foam on facades. The results indicate that as the gas-liquid ratio increases from 4:1–15:1, the foam spreading rate decreases by 3 times, while the foam layer thickness increases by 2.4 times. When the spray angle increases from 0° to 90°, the spreading rate decreases by 50 %, while the foam layer thickness increases by 50 %. The foam spreading rate on vertical facades is approximately 5.1 times that on horizontal liquid surfaces. An increase in the gas-liquid ratio results in a more uniform foam structure and up to 1.4 times increase in apparent viscosity. A reduction in the spray angle intensified gravitational shear and disrupted the foam structure, which results in a decrease in apparent viscosity. The gas-liquid ratio and spray angle affect the apparent viscosity of foam by modulating its intrinsic physical properties and externally applied forces, thereby affecting the foam spreading and adhesion properties. Predictive models are developed to estimate the spreading rate (<span><math><msub><mrow><mi>V</mi></mrow><mrow><mi>s</mi></mrow></msub></math></span>) and foam layer thickness (<span><math><msub><mrow><mi>H</mi></mrow><mrow><mi>f</mi></mrow></msub></math></span>) in relation to the apparent viscosity (<span><math><mi>η</mi></math></span>), which indicate <span><math><mrow><msub><mrow><mi>V</mi></mrow><mrow><mi>s</mi></mrow></msub><mo>∝</mo><mo>−</mo><mn>5.23</mn><mi>η</mi></mrow></math></span> and <span><math><mrow><msub><mrow><mi>H</mi></mrow><mrow><mi>f</mi></mrow></msub><mo>∝</mo><msup><mrow><mi>e</mi></mrow><mrow><mn>0.48</mn><mi>η</mi></mrow></msup></mrow></math></span>.The model predictions providing a theoretical basis for designing the compressed air foam suppression systems for high-rise building facades.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"737 ","pages":"Article 139829"},"PeriodicalIF":5.4,"publicationDate":"2026-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Absorption and interfacial mass transfer characteristics of sulfur dioxide in an electrospray desulfurization system 电喷雾脱硫系统中二氧化硫的吸收和界面传质特性

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Pub Date : 2026-05-20 Epub Date: 2026-02-10 DOI: 10.1016/j.colsurfa.2026.139916

Jian Gao , Junfeng Wang , Ziwen Zuo , Huibin Xu , HaoJie Xu , Wei Zhang

This study investigates the desulfurization performance of four absorbents (sodium hydroxide NaOH, calcium hydroxide Ca(OH)₂, calcium carbonate CaCO₃, and deionized DI water) in a visualized electrospray absorption tower. Increasing the applied voltage (U) significantly enhances atomization quality, thereby expanding the gas-liquid interfacial area and raising the droplet charge-to-mass ratio. Both the SO₂ absorption efficiency (η) and the overall mass transfer coefficient (K_gα) increase with U, exhibiting a strong dependence on the absorbent type. For highly soluble NaOH and moderately soluble Ca(OH)₂, η at 10 kV more than doubles compared to the uncharged state (U = 0 kV). This marked enhancement arises from two synergistic effects: a physical enhancement from the enlarged interfacial area and a chemical enhancement from electric field-driven migration of OH⁻ to the droplet surface. Conversely, CaCO₃ and DI water show limited improvement (< 50 %) due to insufficient OH⁻ availability. The gas-phase mass transfer coefficient (K_g) depends on the electrohydrodynamic atomization mode, remaining stable in dripping mode, decreasing in microdripping mode, and increasing again in oscillating microdripping mode. These findings establish a clear correlation between electrospray characteristics and desulfurization performance, offering crucial guidance for optimizing the absorbent selection and operating parameters in high-efficiency wet flue gas desulfurization systems to reduce water and energy consumption.

研究了四种吸附剂（氢氧化钠NaOH、氢氧化钙Ca(OH)2、碳酸钙CaCO3和去离子水）在可视化电喷雾吸收塔中的脱硫性能。增加施加电压(U)可显著提高雾化质量，从而扩大气液界面面积，提高液滴电荷质量比。SO2吸收效率（η）和总传质系数（Kgα）均随吸附剂浓度的增加而增加，且与吸附剂类型密切相关。对于高溶性NaOH和中溶性Ca(OH)2，在10 kV时η比未带电状态（U = 0 kV）增加了一倍以上。这种显著的增强是由两种协同效应引起的：增大的界面面积带来的物理增强和电场驱动的OH -⁻迁移到液滴表面带来的化学增强。相反，CaCO3和去离子水的改善有限（< 50 %），因为OH -毒血症不足。气相传质系数（Kg）取决于电液动力雾化模式，在滴注模式下保持稳定，在微滴模式下减小，在振荡微滴模式下再次增大。这些研究结果建立了电喷雾特性与脱硫性能之间的明确相关性，为优化高效湿法烟气脱硫系统的吸收剂选择和运行参数以降低水和能源消耗提供了重要指导。

{"title":"Absorption and interfacial mass transfer characteristics of sulfur dioxide in an electrospray desulfurization system","authors":"Jian Gao , Junfeng Wang , Ziwen Zuo , Huibin Xu , HaoJie Xu , Wei Zhang","doi":"10.1016/j.colsurfa.2026.139916","DOIUrl":"10.1016/j.colsurfa.2026.139916","url":null,"abstract":"<div><div>This study investigates the desulfurization performance of four absorbents (sodium hydroxide NaOH, calcium hydroxide Ca(OH)<sub>2</sub>, calcium carbonate CaCO<sub>3</sub>, and deionized DI water) in a visualized electrospray absorption tower. Increasing the applied voltage (<em>U</em>) significantly enhances atomization quality, thereby expanding the gas-liquid interfacial area and raising the droplet charge-to-mass ratio. Both the SO<sub>2</sub> absorption efficiency (<em>η</em>) and the overall mass transfer coefficient (<em>K</em><sub>g</sub><em>α</em>) increase with <em>U</em>, exhibiting a strong dependence on the absorbent type. For highly soluble NaOH and moderately soluble Ca(OH)<sub>2</sub>, <em>η</em> at 10 kV more than doubles compared to the uncharged state (<em>U</em> = 0 kV). This marked enhancement arises from two synergistic effects: a physical enhancement from the enlarged interfacial area and a chemical enhancement from electric field-driven migration of OH⁻ to the droplet surface. Conversely, CaCO<sub>3</sub> and DI water show limited improvement (< 50 %) due to insufficient OH⁻ availability. The gas-phase mass transfer coefficient (<em>K</em><sub>g</sub>) depends on the electrohydrodynamic atomization mode, remaining stable in dripping mode, decreasing in microdripping mode, and increasing again in oscillating microdripping mode. These findings establish a clear correlation between electrospray characteristics and desulfurization performance, offering crucial guidance for optimizing the absorbent selection and operating parameters in high-efficiency wet flue gas desulfurization systems to reduce water and energy consumption.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"737 ","pages":"Article 139916"},"PeriodicalIF":5.4,"publicationDate":"2026-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0