Carbohydrate Polymers最新文献_第4页

Development of a double-network gel foam based on sodium carboxymethyl cellulose with enhanced extinguishing and re-ignition resistance performance for tank fires 基于羧甲基纤维素钠的双层网状凝胶泡沫的研制，增强了储罐火灾的灭火和抗再燃性能

IF 12.5 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers

Pub Date : 2026-01-22 DOI: 10.1016/j.carbpol.2026.124996

Congpei Wu , Zhenqi Hu , Jianping Zhang , Chang Tian , Anthony Chun Yin Yuen , Jinlong Zhao

Traditional fluorinated foams (AFFF/FFFP), widely used for liquid fire suppression, suffer from poor thermal stability, re-ignition propensity, and often contain environmentally harmful fluorocarbon surfactants. This study developed an interpenetrating double-network gel foam (IDNGF) using non-fluorinated surfactants (AEG and AOS), gelling agent (CMC-Na and Na₂SiO₃), and crosslinking agent (AlCit). Orthogonal experiments optimized the foam expansion ratio and water retention. The optimal formulation—0.6 wt% AOS/AEG (1:9), 2.2 wt% Na₂SiO₃, 0.14 wt% CMCNa, and 1.0 wt% AlCit—produced homogeneous foams with enhanced thermal stability due to the formation of a CMC–Al³⁺/silicate double-network structure. Thermogravimetric analysis revealed a significantly higher complete evaporation temperature than conventional FFFP. Reactive forcefield molecular dynamics (ReaxFF-MD) simulations identified orthosilicic acid and aluminum-containing oxides as key pyrolysis products. Fire extinguishing and re-ignition existence experiments demonstrated that IDNGF reduced extinguishing time by 3.6% relative to FFFP while significantly extending the burnback time to 603 s—a 76.3% improvement. These results highlight the potentil of using IDNGF as a high-performance, re-ignition-resistant, and sustainable fire suppression agent.

传统的氟化泡沫（AFFF/FFFP）广泛用于液体灭火，但其热稳定性差，易重燃，且通常含有对环境有害的氟碳表面活性剂。本研究采用无氟表面活性剂（AEG和AOS）、胶凝剂（CMC-Na和Na₂SiO₃）和交联剂（AlCit）开发了一种互穿双网状凝胶泡沫（IDNGF）。正交试验优化了泡沫膨胀率和保水率。最佳配方为0.6 wt% AOS/AEG (1:9), 2.2 wt% Na₂SiO₃，0.14 wt% CMCNa和1.0 wt% alcit，由于CMC-Al3 +/硅酸盐双网络结构的形成，产生了热稳定性增强的均匀泡沫。热重分析表明，该方法的完全蒸发温度明显高于常规FFFP。反应力场分子动力学（ReaxFF-MD）模拟发现，正硅酸和含铝氧化物是主要的热解产物。灭火和再燃存在性实验表明，相对于FFFP， IDNGF将灭火时间缩短了3.6%，而将燃烧时间显著延长至603 s，提高了76.3%。这些结果突出了使用IDNGF作为高性能、耐再燃和可持续灭火剂的潜力。

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引用次数: 0

Insight into the mechanism of gellan gum enhancing stability of high internal phase Pickering emulsions based on egg yolk granules: Intermolecular interaction and network structure 结冷胶增强蛋黄颗粒高内相皮克林乳稳定性的机理：分子间相互作用和网络结构

IF 12.5 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers

Pub Date : 2026-01-21 DOI: 10.1016/j.carbpol.2026.124979

Yue Huang , Dekun Meng , Nan Zhang , Huajiang Zhang , Lina Xu , Yunhe Xu , Hanyu Li , Ning Xia , Mohamed Ghamry , Ahmed M. Rayan

The integration of polysaccharides into high internal phase Pickering emulsions (HIPPEs) has been recognized as an innovative approach to improving their stability. To reveal the enhancing mechanisms of gellan gum (GG) on the stability of HIPPEs based on egg yolk granules (EYGs), this study systematically investigated the effect of GG concentration on the molecular structure, interfacial properties, and emulsion stability of EYGs-GG complexes. The results showed that HIPPEs stabilized by EYGs-0.3%GG complex exhibited the highest stability. In this complex, GG bound to the surface of EYGs particles via electrostatic attractions and hydrophobic interactions, leading to a 60.0% higher surface charge and a 59.2% lower surface hydrophobicity compared with those of EYGs particles. While the interaction reduced the penetration of EYGs particles at the oil-water interface, it increased the diffusion rate and molecular rearrangement behavior, facilitating the formation of the stable elastic interfacial film. Moreover, adding 0.3% GG formed denser 3D network structures in the aqueous phase, which inhibited oil droplet coalescence and further enhanced the structural strength of the HIPPEs. These findings provided theoretical insights into the mechanism by which GG enhanced the stability of emulsions based on EYGs, offering a rational design strategy for developing high-performance systems of HIPPEs.

将多糖整合到高内相皮克林乳剂（hipes）中被认为是提高其稳定性的一种创新方法。为了揭示结冷胶（GG）对基于蛋黄颗粒（EYGs）的hips稳定性的增强机制，本研究系统地研究了GG浓度对EYGs-GG配合物的分子结构、界面性质和乳状液稳定性的影响。结果表明，EYGs-0.3%GG络合物稳定的hipes稳定性最高。在该复合物中，GG通过静电吸引和疏水相互作用结合在EYGs粒子表面，导致其表面电荷比EYGs粒子高60.0%，表面疏水性比EYGs粒子低59.2%。这种相互作用虽然降低了EYGs颗粒在油水界面的渗透，但增加了扩散速率和分子重排行为，有利于形成稳定的弹性界面膜。此外，0.3% GG在水相中形成了更致密的三维网络结构，抑制了油滴的聚结，进一步增强了hipes的结构强度。这些发现为GG增强EYGs乳液稳定性的机理提供了理论见解，为开发高性能hipes体系提供了合理的设计策略。

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引用次数: 0

Structural properties of two glycans in the fruits of jujube and their regulation effect of M1-type and M2-type macrophage 枣果实中两种聚糖的结构特性及其对m1型和m2型巨噬细胞的调节作用

IF 12.5 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers

Pub Date : 2026-01-21 DOI: 10.1016/j.carbpol.2026.124981

Jingya Ruan , Ping Zhang , Jiaming Cheng , Lequan Yu , Yijin Wu , Yinuo Zheng , Yi Zhang , Tao Wang

Two glycans, ZJPr2–2-1 and ZJPr3–2-1, were isolated from jujube fruits. Structural analysis revealed ZJPr2–2-1 (7.20 kDa) as a previously unreported pectin featuring main chain of →4)-α-D-GalpA-(1→, →3,4)-α-D-GalpA-(1→, and →3)-α-L-Rhap-(1→, with side chains containing →4)-α-L-Arap-(1→, and t-4-deoxy-L-threo-hex-4-enopyranuronic acid (t-α-L-HexA), as well as two isolated fragments linked to →4)-β-D-GalpA, →4)-α-D-GalpA. Nevertheless, the absence of HMBC correlations precluded the structural elucidation of its connected side chain. Meanwhile, ZJPr3–2-1 was identified as the first plant-derived cyclic α-1,6-glucan heptasaccharide. Both glycans were found to promote M1 macrophage polarization (increased CD86 and decreased CD206 expression), and enhance the production of pro-inflammatory mediators (NO, iNOS, and TNF-α) in RAW264.7 cells. The mechanism was supposed to associated with the direct (ZJPr3–2-1) and indirect (ZJPr2–2-1) activation of the Dectin-1/Syk signaling pathway.

从枣果实中分离得到ZJPr2-2-1和ZJPr3-2-1两个聚糖。结构分析表明，ZJPr2-2-1 （7.20 kDa）是一种未见报道的果胶，其主链为→4)-α- d - galpa -(1→，→3,4)-α- d - galpa -(1→，→3)-α- l - rhap -(1→，和→3)-α- l - rhap -（1→），侧链含有→4)-α- l - arap -(1→，和t-4-脱氧- l -三己-4-烯吡喃醛酸（t-α- l - hexa），以及两个分离片段连接到→4)-β- d - galpa，→4)-α- d - galpa。然而，缺乏HMBC相关性排除了其连接侧链的结构解析。同时，ZJPr3-2-1被鉴定为第一个植物衍生的环α-1,6-葡聚糖七糖。两种聚糖均可促进M1巨噬细胞极化（增加CD86表达，降低CD206表达），并增强RAW264.7细胞中促炎介质（NO、iNOS和TNF-α）的产生。其机制可能与Dectin-1/Syk信号通路的直接（ZJPr3-2-1）和间接（ZJPr2-2-1）激活有关。

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引用次数: 0

Mechanistic insights into how wheat flour mill streams affect Chinese steamed bread quality: A perspective from starch multi-scale structure and physicochemical properties 小麦粉加工工艺对馒头品质影响的机理研究：基于淀粉多尺度结构和理化性质的视角

IF 12.5 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers

Pub Date : 2026-01-21 DOI: 10.1016/j.carbpol.2026.124984

Mengkun Song , Yongji Ni , Junhui Gao , Xiangjie Li , Yingying Zhang , Yanyan Zhang , Xingli Liu , Huishan Shen , Hua Zhang , Hongwei Wang

This work investigated the evolution of multi-scale structures and physicochemical properties of starch from the break, sizing, reduction and tailing flour mill streams and their influence on Chinese steamed bread quality. The break milling with toothed rollers severely damaged starch granular surface, thinned semi-crystalline lamellae, reduced crystallinity degree and molecular orderliness. As milling progressed from the sizing to the tailing system, intensified mechanical forces induced surface cracks and disrupted lamellar structure. Furthermore, these forces could induce disorganization or amorphization of ordered crystalline, short-range ordered and double-helical structure as milling proceeded from the sizing to the tailing system, with the values of starch relative crystallinity, R_1047/1022 and double helices decreased from 22.8% to 18.1%, 0.89 to 0.77, and 40.8% to 36.2%, respectively. The resultant structural disordering enhanced water-starch interactions, thereby markedly increasing the hydration capacity, swelling power and characteristic viscosity of starch, especially for starch from the tailing system. The steamed bread reconstituted with sizing and reduction starches presented a higher specific volume and lower hardness compared to those containing break and tailing starches, which could be attributed to their well-preserved structural stability. The findings provide a theoretical basis for optimizing the wheat flour milling process and regulating steamed bread quality.

研究了面粉厂破碎、施胶、还原、尾渣等工艺流程中淀粉的多尺度结构和理化性质的演变及其对馒头品质的影响。齿辊破碎粉碎严重破坏淀粉颗粒表面，使半晶片变薄，结晶度降低，分子有序度降低。随着磨矿从施胶到尾矿，机械力的增强导致了表面裂纹和层状结构的破坏。从施浆到尾矿制粉过程中，这些作用力会导致有序晶、短程有序晶和双螺旋结构的无序或非晶化，淀粉的相对结晶度、R1047/1022和双螺旋结构分别从22.8%降至18.1%、0.89降至0.77和40.8%降至36.2%。由此产生的结构紊乱增强了水与淀粉的相互作用，从而显著提高了淀粉的水化能力、膨胀力和特征粘度，尤其是来自尾矿系统的淀粉。与含破碎淀粉和尾渣淀粉的馒头相比，施胶淀粉和还原淀粉的馒头具有更高的比容和更低的硬度，这可能是由于它们的结构稳定性得到了很好的保存。研究结果为优化小麦粉制粉工艺和调节馒头品质提供了理论依据。

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引用次数: 0

Corrigendum to “Mussel-inspired polysaccharide-based sponges for hemostasis and bacteria infected wound healing” [Carbohydrate Polymers 295 (2022) 119868] “用于止血和细菌感染伤口愈合的贻贝启发的多糖海绵”的更正[碳水化合物聚合物295 (2022)119868]

IF 12.5 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers

Pub Date : 2026-01-21 DOI: 10.1016/j.carbpol.2025.124510

Wen Sun , Changjun Mu , Xu Zhang , Hengchong Shi , Qiuyan Yan , Shifang Luan

引用次数: 0

N-acetylcysteine-functionalized biodegradable polysaccharide hydrogel patches for the repair of acute liver injury n -乙酰半胱氨酸功能化生物可降解多糖水凝胶贴片修复急性肝损伤

IF 12.5 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers

Pub Date : 2026-01-21 DOI: 10.1016/j.carbpol.2026.124983

Shanshan Li , Lixin Xia , Shuo Wang , Ruibao Ju , Zi Han , Xiansen Lv , Baoqin Han , Jinhua Chi

Acute liver injury (ALI) caused by acetaminophen (APAP) has a high incidence rate worldwide, and severe cases may cause liver failure or even death. N-acetylcysteine (NAC), as an effective treatment drug approved for clinical application in ALI, has limitations such as a short half-life and the requirement for high-dose injections. Consequently, it is imperative to optimize new administration method of NAC and promote alternative therapeutic strategies for ALI. Herein, hydrogel patches ONC composed of oxidized chondroitin sulfate (OCS) and NAC-grafted CMCS were developed, and their reparative effects on APAP-induced ALI were investigated. ONC hydrogels exhibited excellent biocompatibility and appropriate biodegradability, and favorable hemostatic effects in the liver. In vitro experiments demonstrated that ONC could promote the proliferation and migration of hepatocytes, as well as the angiogenesis of HUVECs. By establishing an APAP-induced ALI model in mice, liver enzymes after ONC hydrogel patches treatment recovered to near-normal levels. Moreover, histological examination, RT-qPCR, and transcriptome sequencing results demonstrated that ONC patches could reduce the expression of inflammatory factors and apoptosis in the liver, while simultaneously activating antioxidant-related signaling pathways, thereby promoting the regeneration and functional repair of damaged tissues. Therefore, ONC hydrogel patches may be a promising alternative strategy for treating ALI.

对乙酰氨基酚（APAP）引起的急性肝损伤（ALI）在世界范围内发病率很高，严重者可引起肝功能衰竭甚至死亡。n -乙酰半胱氨酸（NAC）作为一种被批准临床应用的有效治疗药物，存在半衰期短、需要大剂量注射等局限性。因此，优化NAC的新给药方法，促进ALI的替代治疗策略势在必行。本文制备了由氧化硫酸软骨素（OCS）和nac接枝的CMCS组成的水凝胶贴片ONC，并研究了它们对apap诱导的ALI的修复作用。ONC水凝胶具有良好的生物相容性和适当的生物降解性，在肝脏中具有良好的止血作用。体外实验表明，ONC能促进肝细胞的增殖和迁移，促进HUVECs血管生成。通过建立apap诱导的小鼠ALI模型，ONC水凝胶贴片处理后肝脏酶恢复到接近正常水平。此外，组织学检查、RT-qPCR和转录组测序结果表明，ONC补丁可以降低肝脏中炎症因子和凋亡的表达，同时激活抗氧化相关的信号通路，从而促进受损组织的再生和功能修复。因此，ONC水凝胶贴片可能是治疗ALI的一种有希望的替代策略。

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引用次数: 0

Improvement of dough rheological behavior and overall product quality through incorporation of physically modified dietary fiber polysaccharides: A review 通过添加物理改性膳食纤维多糖改善面团流变学行为和整体产品质量：综述

IF 12.5 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers

Pub Date : 2026-01-21 DOI: 10.1016/j.carbpol.2026.124978

Faying Zheng , Xinxin Li , Zhaowei Han , Xuchun Zhu , Pengtao Zhang , Feiyue Ren , Hongzhi Liu

The incorporation of fiber polysaccharides into refined wheat flour enhances its nutritional properties. However, promoting the consumption of high dietary fiber (DF) products is challenging due to the undesirable quality issues. This review examines the potential of incorporating physically modified DF polysaccharides to enhance quality, with a specific focus on their impact on DF structure, dough rheological properties, and the quality of the final product. Different physical modification techniques exert distinct structural fingerprints on DF, each inducing primary effects at different hierarchical levels. Extrusion-induced increases in soluble components were observed to enhance dough extensibility, while ultrasonic and microwave treatments formed surface structures that promoted dough water absorption. Micronization helped maintain gluten network continuity, which in turn improved dough viscoelasticity. Furthermore, improvements in the gluten matrix, gas phase, and the formation of liquid films are considered key mechanisms through which physically modified DF enhances the quality of flour products. Additionally, mechanical stress-induced cell-wall disruption was associated with increased nutrient release from the DF matrix. This study offers theoretical guidance for the quality formation of high DF products, potentially supporting the creation of products that balance nutritional value with sensory appeal.

精制小麦粉中掺入纤维多糖可提高其营养特性。然而，由于不良的质量问题，促进高膳食纤维产品的消费是具有挑战性的。这篇综述探讨了加入物理改性的DF多糖以提高质量的潜力，特别关注它们对DF结构、面团流变特性和最终产品质量的影响。不同的物理修饰技术对DF产生不同的结构指纹，每种技术在不同的层次上诱导主要效应。挤压诱导的可溶性成分的增加可以增强面团的延展性，而超声波和微波处理形成的表面结构可以促进面团的吸水。微粉化有助于保持面筋网络的连续性，从而提高面团的粘弹性。此外，面筋基质、气相和液膜形成的改善被认为是物理改性DF提高面粉产品质量的关键机制。此外，机械应力诱导的细胞壁破坏与DF基质中营养物质释放增加有关。该研究为高DF产品的质量形成提供了理论指导，可能支持创造营养价值与感官吸引力平衡的产品。

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引用次数: 0

Critical insights into coleopteran insect side-streams derived chitin and chitosan: extraction chemistry, structural features and multifunctional applications 鞘翅目昆虫侧流衍生几丁质和壳聚糖：提取化学、结构特征和多功能应用

IF 12.5 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers

Pub Date : 2026-01-21 DOI: 10.1016/j.carbpol.2026.124958

Divya Karthick Rajan , Durairaj Karthick Rajan , Jayakumar Rajarajeswaran , Nagarajan Revathi , Shubing Zhang , Kannan Mohan , Abirami Ramu Ganesan

Edible coleopteran insects are an important source for sustainable protein and generating chitin as a significant waste (exuviae, cuticle residues, and frass), which can be valorized into value-added biopolymers. These side-streams can be diverted for chitin and chitosan production due to their biocompatibility and biodegradability in biomaterial applications which gained attention in recent times. Therefore, this review evaluates various types of chitin and chitosan extractions and their structural characterization suitable for industrial applications. The nutritional and bioactive functionalities of chitin as derived from coleoptera insect side-streams were critically discussed. Furthermore, it also distinguishes the presence of α-, β-, and γ-chitin polymorphic forms exhibited in the coleopterans order with recent research gaps was also discussed herein. Currently, there is no literature review that describes the roles of coleopteran side-streams derived chitin and chitosan. Hence, this review not only underscores the potential for chitin production from coleopteran side-streams but also outlines critical bottlenecks that warrant further investigation in biopolymer chemistry. Moreover, it provides comprehensive recommendations to facilitate the scale-up of chitin and chitosan derived from coleopteran side-streams as an added advantage for new business models.

可食用的鞘翅目昆虫是可持续蛋白质和甲壳素的重要来源，甲壳素是一种重要的废物（蜕皮、角质层残留物和碎屑），可以转化为增值的生物聚合物。由于其生物相容性和可生物降解性，这些侧流可以用于甲壳素和壳聚糖的生产，近年来在生物材料中得到了广泛的应用。因此，本文对几种适合工业应用的甲壳素和壳聚糖提取液及其结构表征进行了综述。本文讨论了从鞘翅目昆虫侧流中提取的几丁质的营养和生物活性。此外，它还区分了鞘翅目动物中α-、β-和γ-几丁质多态形式的存在，并对最近的研究空白进行了讨论。目前，还没有文献综述描述鞘翅目侧流衍生的几丁质和壳聚糖的作用。因此，这篇综述不仅强调了从鞘翅目侧流生产几丁质的潜力，而且概述了生物聚合物化学中值得进一步研究的关键瓶颈。此外，它还提供了全面的建议，以促进扩大从鞘翅目侧流中提取的几丁质和壳聚糖的规模，作为新的商业模式的额外优势。

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引用次数: 0

Dynamic chitosan-hyaluronic acid hydrogels for extrusion printing: Combined effects of polymer molecular weight and carbon nanofillers 挤出印刷用动态壳聚糖-透明质酸水凝胶：聚合物分子量和碳纳米填料的联合效应

IF 12.5 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers

Pub Date : 2026-01-21 DOI: 10.1016/j.carbpol.2026.124982

Ane García-García , Maialen Goyoaga , Francisco Nuño , Ana Catarina Lopes , Estíbaliz Hernáez-Laviña , Isabel Moreno-Benítez , Jose Luis Vilas-Vilela , Senentxu Lanceros , Leyre Pérez-Álvarez

Despite the increasing interest on self-healing hydrogels in the fabrication of customized scaffolds for tissue engineering applications, their optimal printability is still a challenge due to the weak mechanical stability of dynamic networks. This work presents the first successful extrusion-based 3D-printing of N-succinyl chitosan (S-CHI) and oxidized hyaluronic acid (A-HA). The dynamic hydrogels based on imine bonds formation between S-CHI and A-HA were reinforced with graphene oxide (GO), amino-functionalized GO (GO-NH₂), carboxyl-functionalized carbon nanotubes (CNT-COOH), and amino-functionalized CNTs (CNT-NH₂) in order to study their effect on the 3D-printability, mechanical, rheological and self-healing properties of the gels. Compression tests, strain sweeps tests and the geometry of the printed scaffolds shown that non-aminolized GO and CNTs strengthen the networks, and improve printability but cause a detrimental effect on the self-recovery capability, unlike amino-functionalized fillers that enhance self-repairing but weaken mechanical strength and printability. The presence of the fillers also delays gelation, particularly in the case of amino functionalized particles. However, electrochemical impedance spectroscopy confirmed that the incorporation of the fillers did not affect the electrical conductivity of the hydrogels. Besides, this study analyses the role of the molecular weight of S-CHI units on the aforementioned properties.

尽管人们对自修复水凝胶在组织工程定制支架制造中的应用越来越感兴趣，但由于动态网络的机械稳定性较弱，其最佳打印性仍然是一个挑战。这项工作提出了第一个成功的基于挤压的3d打印n-琥珀酰壳聚糖（S-CHI）和氧化透明质酸（A-HA）。利用氧化石墨烯（GO）、氨基功能化氧化石墨烯（GO- nh2）、羧基功能化碳纳米管（CNT-COOH）和氨基功能化碳纳米管（CNT-NH2）对S-CHI和A-HA之间形成亚胺键的动态水凝胶进行增强，研究它们对凝胶的3d打印性能、力学性能、流变学性能和自愈性能的影响。压缩测试、应变扫描测试和打印支架的几何形状表明，非氨基化氧化石墨烯和碳纳米管增强了网络，提高了打印性，但对自恢复能力造成了不利影响，而氨基功能化填料增强了自修复能力，但削弱了机械强度和打印性。填料的存在也会延迟凝胶化，特别是在氨基功能化颗粒的情况下。然而，电化学阻抗谱证实，填料的掺入并不影响水凝胶的导电性。此外，本研究还分析了S-CHI单元的分子量对上述性能的影响。

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引用次数: 0

Effect of grafted groups on adsorption conformation and adsorption behavior of guar gum: insights from molecular interactions 接枝基团对瓜尔胶吸附构象和吸附行为的影响：来自分子相互作用的见解

IF 12.5 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers

Pub Date : 2026-01-20 DOI: 10.1016/j.carbpol.2026.124974

Peng Shi , Shibin Wang , Fengjie Ma , Mian Zhang , Hongbo Zeng

The adsorption conformation of guar gum molecules on silica surfaces determines the structural characteristics of the adsorption layer, potentially enabling diverse functionalities in engineering applications. However, the influence of grafted groups on the adsorption characteristics of guar gum remains unclear. The adsorption conformations and morphologies of unmodified ordinary guar gum (GG) and three modified guar gums — hydroxypropyl guar gum (HPG), carboxymethyl guar gum (CMG), and hydroxypropyl trimethylammonium chloride guar gum (HPTCG) — on silica surfaces were investigated via molecular dynamics simulations and AFM topography. The adsorption behavior of four guar gums was investigated by QCM-D experiment. The four guar gums exhibited distinct adsorption conformations: GG formed a mushroom-like structure, HPG adopted a “lying-flat” conformation with moderate folding, CMG presented an “L-shaped” orientation, and HPTCG displayed an upright conformation. AFM adhesion force measurements and chemical calculations indicated that the types and intensities of interactions between the four guar gums and silica surfaces varied. These differences result in different adsorption capacities, diffusion coefficients, adsorption layer stability, and layer structural characteristics of the four guar gums on silica surfaces. The results provide valuable insights for the molecular design of guar gum derivatives and their potential applications in interfacial fields.

瓜尔胶分子在二氧化硅表面的吸附构象决定了吸附层的结构特征，在工程应用中有可能实现多种功能。然而，接枝基团对瓜尔胶吸附特性的影响尚不清楚。通过分子动力学模拟和原子力显微镜形貌研究了未改性普通瓜尔胶（GG）和三种改性瓜尔胶——羟丙基瓜尔胶（HPG）、羧甲基瓜尔胶（CMG）和羟丙基三甲基氯化铵瓜尔胶（HPTCG）在二氧化硅表面的吸附构象和形貌。采用QCM-D实验研究了四种瓜尔胶的吸附行为。四种瓜尔胶表现出不同的吸附构象：GG为蘑菇状结构，HPG为“平躺”结构，折叠适度，CMG为“l形”取向，HPTCG为直立构象。原子力显微镜附着力测量和化学计算表明，四种瓜尔胶与二氧化硅表面相互作用的类型和强度不同。这些差异导致了四种瓜尔胶在二氧化硅表面的吸附能力、扩散系数、吸附层稳定性和层结构特征的不同。研究结果为瓜尔胶衍生物的分子设计及其在界面领域的潜在应用提供了有价值的见解。

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引用次数: 0