Pub Date : 2025-03-26DOI: 10.1016/j.colsurfa.2025.136699
Yang Xu , Fei Wang , Yuliang Zhang , Ting Shu , Wenchao Huang , Xinhao Yan , Yanhua Lei , Shifei Liu , Xiaobo Chen
Anti-icing/de-icing coatings on equipment surfaces are becoming an important protective measure against frost formation and buildup, especially when they are used in very harsh environments. Herein, perfluorodecyltriethoxysilane (FAS) has been grafted onto the surface of graphene (GPE) via hydrolysis in an alkaline condition. The FAS modified graphene (F-GPE) is hydrophobic and conductive. A photothermal and electrothermal superhydrophobic coating is obtained by mixing F-GPE into epoxy resin as a filler for anti/de-icing in cold condition. The coating has a fast electrothermal response speed and rapidly changes the surface temperature of the coating covered with ice and snow from −20 °C to 3.7 °C within 30 s under the safe voltage of 10–15 V. Even under frost conditions, the coating with ice layers could be restored through the synergy of light and electric-to-heat conversion. The ice layer is initially melt in about 90 s, and the ice-waterdrop mixture can be easily removed on the superhydrophobic F-GPE coating. In addition, the coating shows superior mechanical strength. These remarkable properties make it valuable for application and more possibilities in the all-weather anti-icing and de-icing field.
{"title":"Robust photo/electrothermal synergistically all-weather anti/de-icing superhydrophobic composite coating based on modified graphene","authors":"Yang Xu , Fei Wang , Yuliang Zhang , Ting Shu , Wenchao Huang , Xinhao Yan , Yanhua Lei , Shifei Liu , Xiaobo Chen","doi":"10.1016/j.colsurfa.2025.136699","DOIUrl":"10.1016/j.colsurfa.2025.136699","url":null,"abstract":"<div><div>Anti-icing/de-icing coatings on equipment surfaces are becoming an important protective measure against frost formation and buildup, especially when they are used in very harsh environments. Herein, perfluorodecyltriethoxysilane (FAS) has been grafted onto the surface of graphene (GPE) via hydrolysis in an alkaline condition. The FAS modified graphene (F-GPE) is hydrophobic and conductive. A photothermal and electrothermal superhydrophobic coating is obtained by mixing F-GPE into epoxy resin as a filler for anti/de-icing in cold condition. The coating has a fast electrothermal response speed and rapidly changes the surface temperature of the coating covered with ice and snow from −20 °C to 3.7 °C within 30 s under the safe voltage of 10–15 V. Even under frost conditions, the coating with ice layers could be restored through the synergy of light and electric-to-heat conversion. The ice layer is initially melt in about 90 s, and the ice-waterdrop mixture can be easily removed on the superhydrophobic F-GPE coating. In addition, the coating shows superior mechanical strength. These remarkable properties make it valuable for application and more possibilities in the all-weather anti-icing and de-icing field.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"716 ","pages":"Article 136699"},"PeriodicalIF":4.9,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715246","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}
Pub Date : 2025-03-26DOI: 10.1016/j.colsurfa.2025.136737
Yijing Y. Stehle , Timothy J. Barnum , Xiaoyu Hu , Qin Zou
Graphene oxide (GO) membranes, known for their high dielectric constant and low dielectric loss, have emerged as promising separators for advanced energy storage and transfer devices. While previous research has focused on the aqueous stability enhancement by high-valence metal cations, their effect on modifying the dielectric properties of GO membranes remains understudied. This study investigates the impact of transition metal cation modification on the aqueous stability and dielectric properties of graphene oxide (GO) membranes. Multivalent transition metal chlorides (FeCl3, FeCl2, CuCl2, and CuCl) were introduced during the self-assembly process to create modified GO membranes. The membranes were characterized using various techniques, including zeta potential measurements, contact angle measurements, FTIR spectroscopy, and XRD spectroscopy. The aqueous stability of the modified membranes was evaluated, and their dielectric performance was assessed using capacitance measurements across a frequency range of 0.1 Hz to 105 Hz. The results demonstrate that the choice of transition metal cation and its oxidation state significantly influence the morphology, aqueous stability, and dielectric properties of the GO membranes. Notably, Fe3+ and Cu2+ modifications enhanced aqueous stability, while Fe2+ and Cu+ modifications improved dielectric performance. This study provides insights into tailoring the properties of GO membranes for various applications, including energy storage and transfer devices.
{"title":"Transition metal modification of graphene oxide membranes for enhanced aqueous stability and dielectric performance","authors":"Yijing Y. Stehle , Timothy J. Barnum , Xiaoyu Hu , Qin Zou","doi":"10.1016/j.colsurfa.2025.136737","DOIUrl":"10.1016/j.colsurfa.2025.136737","url":null,"abstract":"<div><div>Graphene oxide (GO) membranes, known for their high dielectric constant and low dielectric loss, have emerged as promising separators for advanced energy storage and transfer devices. While previous research has focused on the aqueous stability enhancement by high-valence metal cations, their effect on modifying the dielectric properties of GO membranes remains understudied. This study investigates the impact of transition metal cation modification on the aqueous stability and dielectric properties of graphene oxide (GO) membranes. Multivalent transition metal chlorides (FeCl<sub>3</sub>, FeCl<sub>2</sub>, CuCl<sub>2</sub>, and CuCl) were introduced during the self-assembly process to create modified GO membranes. The membranes were characterized using various techniques, including zeta potential measurements, contact angle measurements, FTIR spectroscopy, and XRD spectroscopy. The aqueous stability of the modified membranes was evaluated, and their dielectric performance was assessed using capacitance measurements across a frequency range of 0.1 Hz to 10<sup>5</sup> Hz. The results demonstrate that the choice of transition metal cation and its oxidation state significantly influence the morphology, aqueous stability, and dielectric properties of the GO membranes. Notably, Fe<sup>3+</sup> and Cu<sup>2+</sup> modifications enhanced aqueous stability, while Fe<sup>2+</sup> and Cu<sup>+</sup> modifications improved dielectric performance. This study provides insights into tailoring the properties of GO membranes for various applications, including energy storage and transfer devices.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"716 ","pages":"Article 136737"},"PeriodicalIF":4.9,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715240","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}
Pub Date : 2025-03-26DOI: 10.1016/j.colsurfa.2025.136757
Xiajing Hong , Yalei Wang , Zhiwei Du , Tailin Li , Yuqing Wu , Yalan Li , Xiurong Li
Flexible multifunctional hydrogels show tremendous potential for advanced wearable electronics and biosensing applications. This study develops an eco-friendly strategy utilizing cellulose nanofibers (CNF) - renewable, high-aspect-ratio nanomaterials with superior mechanical strength - as multiscale reinforcements in polyacrylamide (PAM) hydrogels. The hierarchical design achieves synergistic performance enhancements through three-scale interactions: molecular-scale hydrogen bonding between CNF hydroxyls and PAM amide groups restricts chain slippage, enabling efficient stress transfer while guiding ordered ion distribution for enhanced strain sensitivity. Nanoscale CNF networks collaborate with dimethyl sulfoxide (DMSO) to optimize microstructure, yielding exceptional thermal stability (<20 % mass loss at 50 °C) through vapor pressure suppression and solvent retention. Macroscopically, CNF acts as physical crosslinkers in the dual-network hydrogel, delivering remarkable mechanical properties including high toughness (0.32 MJ/m³), ultra-stretchability (305 % strain), and autonomous self-healing (>60 % efficiency). The hydrogel demonstrates dual-mode temperature sensitivity with distinct thermal response coefficients (1.703 %/°C at 0–50 °C; 0.394 %/°C at 50–90 °C) and precise motion detection capabilities, enabling real-time monitoring of human activities. This multiscale engineering approach establishes a universal paradigm for designing sustainable, high-performance hydrogels that integrate mechanical resilience, environmental stability, and multi-signal sensing functions.
{"title":"Cellulose nanofiber-reinforced dual-network multifunctional ion-conductive hydrogel with highly sensitive temperature and stress sensing properties for wearable flexible sensors","authors":"Xiajing Hong , Yalei Wang , Zhiwei Du , Tailin Li , Yuqing Wu , Yalan Li , Xiurong Li","doi":"10.1016/j.colsurfa.2025.136757","DOIUrl":"10.1016/j.colsurfa.2025.136757","url":null,"abstract":"<div><div>Flexible multifunctional hydrogels show tremendous potential for advanced wearable electronics and biosensing applications. This study develops an eco-friendly strategy utilizing cellulose nanofibers (CNF) - renewable, high-aspect-ratio nanomaterials with superior mechanical strength - as multiscale reinforcements in polyacrylamide (PAM) hydrogels. The hierarchical design achieves synergistic performance enhancements through three-scale interactions: molecular-scale hydrogen bonding between CNF hydroxyls and PAM amide groups restricts chain slippage, enabling efficient stress transfer while guiding ordered ion distribution for enhanced strain sensitivity. Nanoscale CNF networks collaborate with dimethyl sulfoxide (DMSO) to optimize microstructure, yielding exceptional thermal stability (<20 % mass loss at 50 °C) through vapor pressure suppression and solvent retention. Macroscopically, CNF acts as physical crosslinkers in the dual-network hydrogel, delivering remarkable mechanical properties including high toughness (0.32 MJ/m³), ultra-stretchability (305 % strain), and autonomous self-healing (>60 % efficiency). The hydrogel demonstrates dual-mode temperature sensitivity with distinct thermal response coefficients (1.703 %/°C at 0–50 °C; 0.394 %/°C at 50–90 °C) and precise motion detection capabilities, enabling real-time monitoring of human activities. This multiscale engineering approach establishes a universal paradigm for designing sustainable, high-performance hydrogels that integrate mechanical resilience, environmental stability, and multi-signal sensing functions.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"717 ","pages":"Article 136757"},"PeriodicalIF":4.9,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143740131","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}
Pub Date : 2025-03-25DOI: 10.1016/j.colsurfa.2025.136754
Xin Li , Xinxin Liu , Dongjie He, Xin Wang, Nuo Xu, Ke Li, Aimin Lv, Qun Liu, Yu Zhang
Organic dyes containing azo/anthropquinone groups pose severe ecological risks due to their toxicity and persistence. Therefore, in this study, covalently cross-linked agarose aerogel was used as the substrate, and the Cu-BTC metal-organic framework (Cu-MOF) was loaded via in-situ growth at room temperature to prepare a Cu-MOF @ agarose composite aerogel (Cu-MOF@AGA) adsorbent. The introduction of Cu-MOF endows Cu-MOF@AGA with more adsorption sites and a larger specific surface area (210.78 m²/g). The characteristic peaks at 2θ values of 6.6, 9.4, and 11.5 in the XRD pattern indicate the successful loading of Cu-MOF. Meanwhile, SEM images show that the 3D macroporous structure of Cu-MOF @AGA provides a rapid mass - transfer channel for pollutant molecules. FT-IR results reveal that Cu-MOF@AGA has more functional groups (such as -OH, -COOH) and active sites. The adsorption mechanism was analyzed using XPS and FT-IR, revealing that the adsorbent achieves adsorption of methylene blue (MB) and Congo red (CR) through hydrogen bonding, π-π interactions, and electrostatic interactions. Kinetic and isotherm fitting analyses demonstrated that the maximum adsorption capacities for methylene blue and Congo red reached 59.48 and 159.85 mg/g, respectively. Finally, after five cycles of adsorption experiments, the removal rates for MB and CR remained above 85 %, indicating that the adsorbent exhibits excellent reusability and promising application potential.
{"title":"Facile room-temperature synthesis of agarose-supported Cu-BTC metal-organic framework aerogel composites for enhanced adsorption of methylene blue and congo red dyes","authors":"Xin Li , Xinxin Liu , Dongjie He, Xin Wang, Nuo Xu, Ke Li, Aimin Lv, Qun Liu, Yu Zhang","doi":"10.1016/j.colsurfa.2025.136754","DOIUrl":"10.1016/j.colsurfa.2025.136754","url":null,"abstract":"<div><div>Organic dyes containing azo/anthropquinone groups pose severe ecological risks due to their toxicity and persistence. Therefore, in this study, covalently cross-linked agarose aerogel was used as the substrate, and the Cu-BTC metal-organic framework (Cu-MOF) was loaded via in-situ growth at room temperature to prepare a Cu-MOF @ agarose composite aerogel (Cu-MOF@AGA) adsorbent. The introduction of Cu-MOF endows Cu-MOF@AGA with more adsorption sites and a larger specific surface area (210.78 m²/g). The characteristic peaks at 2θ values of 6.6, 9.4, and 11.5 in the XRD pattern indicate the successful loading of Cu-MOF. Meanwhile, SEM images show that the 3D macroporous structure of Cu-MOF @AGA provides a rapid mass - transfer channel for pollutant molecules. FT-IR results reveal that Cu-MOF@AGA has more functional groups (such as -OH, -COOH) and active sites. The adsorption mechanism was analyzed using XPS and FT-IR, revealing that the adsorbent achieves adsorption of methylene blue (MB) and Congo red (CR) through hydrogen bonding, π-π interactions, and electrostatic interactions. Kinetic and isotherm fitting analyses demonstrated that the maximum adsorption capacities for methylene blue and Congo red reached 59.48 and 159.85 mg/g, respectively. Finally, after five cycles of adsorption experiments, the removal rates for MB and CR remained above 85 %, indicating that the adsorbent exhibits excellent reusability and promising application potential.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"716 ","pages":"Article 136754"},"PeriodicalIF":4.9,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725026","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}
Pub Date : 2025-03-25DOI: 10.1016/j.colsurfa.2025.136733
Binbin Yang , Haixun Sun , Huijiao Lv , Maolin Chen , Yiyan Jiang , Feiya Fu , Miao Su , Xiangdong Liu
In this study, a cellulose composite material based on ZnO-Au nanoparticles was developed as a flexible and effective substrate for surface-enhanced Raman spectroscopy ( SERS) analysis. Through the biomineralization of cellulose, ZnO nanoflowers were formed inside it, and Au nanoparticles were well dispersed in the three-dimensional cellulose framework to prevent the uncontrolled aggregation of Au NPs. This resulted in abundant ‘hot spots’ for enhanced SERS signals. The morphology, structure and mechanical properties of the nanocomposites were further characterized. The nanocomposites exhibit excellent antibacterial activity and cell safety. Using rhodamine 6 G ( R6G) as a probe molecule, the substrate achieved a detection limit of 10−8 M and an enhancement factor ( EF) of 5.4 × 107 with good reproducibility. In addition, due to the biocompatibility, porosity and mechanical flexibility of the SERS substrate, it can directly adsorb and detect pesticide residues in fruits and harmful dyes in traditional Chinese medicine, with detection limits of 0.1 ppm and 10−5 mg/ml, respectively. This environmentally friendly SERS substrate shows potential for food and drug safety applications.
{"title":"Utilizing ZnO mineralization for the synthesis of cellulose nanocomposites embedded with noble metal NPs for enhanced SERS detection","authors":"Binbin Yang , Haixun Sun , Huijiao Lv , Maolin Chen , Yiyan Jiang , Feiya Fu , Miao Su , Xiangdong Liu","doi":"10.1016/j.colsurfa.2025.136733","DOIUrl":"10.1016/j.colsurfa.2025.136733","url":null,"abstract":"<div><div>In this study, a cellulose composite material based on ZnO-Au nanoparticles was developed as a flexible and effective substrate for surface-enhanced Raman spectroscopy ( SERS) analysis. Through the biomineralization of cellulose, ZnO nanoflowers were formed inside it, and Au nanoparticles were well dispersed in the three-dimensional cellulose framework to prevent the uncontrolled aggregation of Au NPs. This resulted in abundant ‘hot spots’ for enhanced SERS signals. The morphology, structure and mechanical properties of the nanocomposites were further characterized. The nanocomposites exhibit excellent antibacterial activity and cell safety. Using rhodamine 6 G ( R6G) as a probe molecule, the substrate achieved a detection limit of 10<sup>−8</sup> M and an enhancement factor ( EF) of 5.4 × 10<sup>7</sup> with good reproducibility. In addition, due to the biocompatibility, porosity and mechanical flexibility of the SERS substrate, it can directly adsorb and detect pesticide residues in fruits and harmful dyes in traditional Chinese medicine, with detection limits of 0.1 ppm and 10<sup>−5</sup> mg/ml, respectively. This environmentally friendly SERS substrate shows potential for food and drug safety applications.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"716 ","pages":"Article 136733"},"PeriodicalIF":4.9,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746201","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}
Pub Date : 2025-03-25DOI: 10.1016/j.colsurfa.2025.136715
Hong Zheng , Xue Jiang , Yu Wang , Geng Zhang , Baoliang Zhang , Qiuyu Zhang
The adsorption and separation of uranium are critical for the treatment of nuclear wastewater. Zeolitic imidazolate framework-8 (ZIF-8) nanoparticles have been widely employed in wastewater treatment due to their large specific surface area, thermal stability, and chemical stability. However, the small pore size (<2 nm) of ZIF-8, which is predominantly microporous, increases reaction resistance and reduces the separation efficiency of metal ions in aqueous solutions. To address these limitations, this study proposes a hierarchical porous ZIF-8 (HpZIF-8) structure containing both micropores and mesopores. HpZIF-8 was synthesized using polydiallyldimethylammonium chloride (PDDA) as a template to guide the formation of the microporous ZIF-8 framework. Nitrogen adsorption-desorption isotherms confirmed that HpZIF-8 exhibits dual microporous and mesoporous characteristics. The equilibrium adsorption capacity of HpZIF-8 for uranium was 297.7 mg/g, significantly exceeding that of conventional ZIF-8 nanoparticles. Additionally, the adsorption rate of uranium by HpZIF-8 was 46.52 mg/g·min, 1.67 times higher than that of ZIF-8 (27.92 mg/g·min). HpZIF-8 demonstrates superior adsorption capacity, attributed to its unique hierarchical porous structure. This study highlights the potential of HpZIF-8 for rapid uranium capture in contaminated environments, providing a promising approach for the application of metal-organic frameworks in environmental remediation.
{"title":"Fabrication of hierarchical porous ZIF-8 for enhanced adsorption of uranium","authors":"Hong Zheng , Xue Jiang , Yu Wang , Geng Zhang , Baoliang Zhang , Qiuyu Zhang","doi":"10.1016/j.colsurfa.2025.136715","DOIUrl":"10.1016/j.colsurfa.2025.136715","url":null,"abstract":"<div><div>The adsorption and separation of uranium are critical for the treatment of nuclear wastewater. Zeolitic imidazolate framework-8 (ZIF-8) nanoparticles have been widely employed in wastewater treatment due to their large specific surface area, thermal stability, and chemical stability. However, the small pore size (<2 nm) of ZIF-8, which is predominantly microporous, increases reaction resistance and reduces the separation efficiency of metal ions in aqueous solutions. To address these limitations, this study proposes a hierarchical porous ZIF-8 (HpZIF-8) structure containing both micropores and mesopores. HpZIF-8 was synthesized using polydiallyldimethylammonium chloride (PDDA) as a template to guide the formation of the microporous ZIF-8 framework. Nitrogen adsorption-desorption isotherms confirmed that HpZIF-8 exhibits dual microporous and mesoporous characteristics. The equilibrium adsorption capacity of HpZIF-8 for uranium was 297.7 mg/g, significantly exceeding that of conventional ZIF-8 nanoparticles. Additionally, the adsorption rate of uranium by HpZIF-8 was 46.52 mg/g·min, 1.67 times higher than that of ZIF-8 (27.92 mg/g·min). HpZIF-8 demonstrates superior adsorption capacity, attributed to its unique hierarchical porous structure. This study highlights the potential of HpZIF-8 for rapid uranium capture in contaminated environments, providing a promising approach for the application of metal-organic frameworks in environmental remediation.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"716 ","pages":"Article 136715"},"PeriodicalIF":4.9,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715241","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}
Pub Date : 2025-03-25DOI: 10.1016/j.colsurfa.2025.136730
Zheyi Zhang , Chenyu Fan , Fen Jiao , Qian Wei
The flotation recovery of fine-grained lepidolite is crucial for the efficient utilization of lithium resources. This study investigated the strengthening effect of the hydrophilic mineral garnet on the flotation of fine-grained lepidolite and explored its mechanism from the perspectives of mineral dissolution and slurry rheology. The flotation results showed that garnet particles significantly enhanced the flotation recovery of fine-grained lepidolite, achieving a maximum recovery of 85.41 % under optimal conditions. The results of infrared spectroscopy and X-ray photoelectron spectroscopy (XPS) analyses confirmed the absence of collector adsorption on garnet surfaces, eliminating competitive consumption of Dodecylamine(DDA)/Sodium dodecyl sulfonate (NaOl) reagents. The results of Zeta potential tests revealed that the ion dissolution on the surface of garnet increased the surface potential of lepidolite. Besides, the Al ions dissolved from the surface of garnet might promote the flotation of lepidolite. The rheological tests of the slurry demonstrated that under the combined action of the collector and coarse-grained garnet, the flocculation of fine-grained lepidolite was promoted, thereby strengthening the flotation recovery of fine-grained lepidolite. The findings provide novel approach and offers insights for optimizing the flotation process of fine-grained lepidolite.
{"title":"Garnet in the flotation of fine-grained lepidolite: Strengthening role and action mechanism","authors":"Zheyi Zhang , Chenyu Fan , Fen Jiao , Qian Wei","doi":"10.1016/j.colsurfa.2025.136730","DOIUrl":"10.1016/j.colsurfa.2025.136730","url":null,"abstract":"<div><div>The flotation recovery of fine-grained lepidolite is crucial for the efficient utilization of lithium resources. This study investigated the strengthening effect of the hydrophilic mineral garnet on the flotation of fine-grained lepidolite and explored its mechanism from the perspectives of mineral dissolution and slurry rheology. The flotation results showed that garnet particles significantly enhanced the flotation recovery of fine-grained lepidolite, achieving a maximum recovery of 85.41 % under optimal conditions. The results of infrared spectroscopy and X-ray photoelectron spectroscopy (XPS) analyses confirmed the absence of collector adsorption on garnet surfaces, eliminating competitive consumption of Dodecylamine(DDA)/Sodium dodecyl sulfonate (NaOl) reagents. The results of Zeta potential tests revealed that the ion dissolution on the surface of garnet increased the surface potential of lepidolite. Besides, the Al ions dissolved from the surface of garnet might promote the flotation of lepidolite. The rheological tests of the slurry demonstrated that under the combined action of the collector and coarse-grained garnet, the flocculation of fine-grained lepidolite was promoted, thereby strengthening the flotation recovery of fine-grained lepidolite. The findings provide novel approach and offers insights for optimizing the flotation process of fine-grained lepidolite.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"716 ","pages":"Article 136730"},"PeriodicalIF":4.9,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725123","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}
Pub Date : 2025-03-25DOI: 10.1016/j.colsurfa.2025.136739
Zihao Huo , Jiayin Liu , Jin Yan , Shuo Wang , Wenxiu Yang , Juchuan Shan , Xuemin Hu
Household textiles such as anti-bug curtains and car seat cushions with fragrance-controlled release properties and temperature regulation have become increasingly popular with the improvement of living standards and health awareness. Microencapsulation is a common finishing method for functional textiles. However, traditional microcapsules are typically designed as single-chamber systems with limited functionality, making it difficult to meet the demands of complex applications. To overcome this limitation, a novel dual-chamber microcapsule was developed, with its design taking inspiration from the lotus seedpod. Robust SiO2 nanospheres containing phase change materials were initially synthesized as Pickering emulsifiers to prepare emulsions loaded with essential oils. The melamine-formaldehyde monomers crosslinked to form the microcapsule walls under acidic conditions. Simultaneously, the SiO2 nanospheres encapsulating phase change materials were integrated into the wall structure. The encapsulation of phase change materials and essential oils within a single capsule was optimized. The dual-chamber microcapsule system manifested fragrance-controlled release and energy-storage properties concurrently. The release studies of essential oils revealed the capacity and mechanism to govern the uniform and stable release of mint oil. Even though the temperature increased by 50 °C, the cumulative release of oil changed by a mere 9.85 %. Moreover, the dual-chamber microcapsule system not only could adjust the material temperature, but also exhibit remarkable thermal impact resistance, and it possesses high thermal stability after 100 cycles. Subsequently, the microcapsules were applied for the functional finishing of the textile, which exhibited excellent fragrance-controlled release and thermal regulation from 30 °C to 70 °C, thereby achieving a comprehensive improvement from smell to touch. Overall, these microcapsules, characterized by their innovative design, were endowed with unique functionality, thereby presenting substantial potential for applications in smart textiles.
{"title":"A novel dual-chamber microcapsule inspired by lotus seedpod for temperature-controlled fragrance release and thermal-regulation of fabrics","authors":"Zihao Huo , Jiayin Liu , Jin Yan , Shuo Wang , Wenxiu Yang , Juchuan Shan , Xuemin Hu","doi":"10.1016/j.colsurfa.2025.136739","DOIUrl":"10.1016/j.colsurfa.2025.136739","url":null,"abstract":"<div><div>Household textiles such as anti-bug curtains and car seat cushions with fragrance-controlled release properties and temperature regulation have become increasingly popular with the improvement of living standards and health awareness. Microencapsulation is a common finishing method for functional textiles. However, traditional microcapsules are typically designed as single-chamber systems with limited functionality, making it difficult to meet the demands of complex applications. To overcome this limitation, a novel dual-chamber microcapsule was developed, with its design taking inspiration from the lotus seedpod. Robust SiO<sub>2</sub> nanospheres containing phase change materials were initially synthesized as Pickering emulsifiers to prepare emulsions loaded with essential oils. The melamine-formaldehyde monomers crosslinked to form the microcapsule walls under acidic conditions. Simultaneously, the SiO<sub>2</sub> nanospheres encapsulating phase change materials were integrated into the wall structure. The encapsulation of phase change materials and essential oils within a single capsule was optimized. The dual-chamber microcapsule system manifested fragrance-controlled release and energy-storage properties concurrently. The release studies of essential oils revealed the capacity and mechanism to govern the uniform and stable release of mint oil. Even though the temperature increased by 50 °C, the cumulative release of oil changed by a mere 9.85 %. Moreover, the dual-chamber microcapsule system not only could adjust the material temperature, but also exhibit remarkable thermal impact resistance, and it possesses high thermal stability after 100 cycles. Subsequently, the microcapsules were applied for the functional finishing of the textile, which exhibited excellent fragrance-controlled release and thermal regulation from 30 °C to 70 °C, thereby achieving a comprehensive improvement from smell to touch. Overall, these microcapsules, characterized by their innovative design, were endowed with unique functionality, thereby presenting substantial potential for applications in smart textiles.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"717 ","pages":"Article 136739"},"PeriodicalIF":4.9,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747023","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}
Pub Date : 2025-03-25DOI: 10.1016/j.colsurfa.2025.136752
Katsiaryna S. Burts , Tatiana V. Plisko , Maria V. Davydova , Maryia S. Makarava , Bingbing Yuan , Anastasia V. Penkova , Sergey S. Ermakov , Alexandr V. Bildyukevich
The effect of molecular weight of polydiallyldimethylammonium chloride (PDADMAC) (<100 kDa, 200–350 kDa, 400–500 kDa) in the aqueous solution used to prepare the intermediate layer on the surface of PSF ultrafiltration membrane-substrate on the structure and performance of thin film composite membranes for nanofiltration obtained via interfacial polymerization was studied. It was found that adsorption of PDADMAC on the surface of PSF membrane-substrate and increase of PDADMAC molecular weight yields the decrease of pore size, porosity, water contact angle and surface roughness parameters. It was shown that application of PDADMAC intermediate layer prior formation of polyamide selective layer via interfacial polymerization results in generating thinner, highly hydrophilic, more positively (less negatively) charged polyamide selective layer with higher cross-linking degree, smaller pore size and lower surface roughness parameters. It was revealed that increase of PDADMAC molecular weight up to 400–500 kDa yields the rise of polyamide selective layer thickness and surface roughness as well as the change of selective layer structure from the structure with globules to the crumbled and folded one. Thin film composite membranes with PDADMAC intermediate layer demonstrated higher water permeance (8.6–11.4 L·m-2·h-1·bar-1 compared to the 4.2 L·m-2·h-1·bar-1 for the reference membrane), higher rejection of MgSO4 (93–98 % compared to 92 % for the reference membrane), higher rejection of PEG-300 (98 % compared to the 96 % for the reference membrane) and dyes with large positively charged organic ion, higher Mg2+/Li+ separation factor (18–38 compared to 8 for the reference membrane) and better antifouling performance.
{"title":"The effect of polydiallyldimethylammonium chloride molecular weight in the intermediate layer on the structure and performance of thin film composite membranes for nanofiltration prepared via interfacial polymerization","authors":"Katsiaryna S. Burts , Tatiana V. Plisko , Maria V. Davydova , Maryia S. Makarava , Bingbing Yuan , Anastasia V. Penkova , Sergey S. Ermakov , Alexandr V. Bildyukevich","doi":"10.1016/j.colsurfa.2025.136752","DOIUrl":"10.1016/j.colsurfa.2025.136752","url":null,"abstract":"<div><div>The effect of molecular weight of polydiallyldimethylammonium chloride <strong>(</strong>PDADMAC) (<100 kDa, 200–350 kDa, 400–500 kDa) in the aqueous solution used to prepare the intermediate layer on the surface of PSF ultrafiltration membrane-substrate on the structure and performance of thin film composite membranes for nanofiltration obtained via interfacial polymerization was studied. It was found that adsorption of PDADMAC on the surface of PSF membrane-substrate and increase of PDADMAC molecular weight yields the decrease of pore size, porosity, water contact angle and surface roughness parameters. It was shown that application of PDADMAC intermediate layer prior formation of polyamide selective layer via interfacial polymerization results in generating thinner, highly hydrophilic, more positively (less negatively) charged polyamide selective layer with higher cross-linking degree, smaller pore size and lower surface roughness parameters. It was revealed that increase of PDADMAC molecular weight up to 400–500 kDa yields the rise of polyamide selective layer thickness and surface roughness as well as the change of selective layer structure from the structure with globules to the crumbled and folded one. Thin film composite membranes with PDADMAC intermediate layer demonstrated higher water permeance (8.6–11.4 L·m<sup>-2</sup>·h<sup>-1</sup>·bar<sup>-1</sup> compared to the 4.2 L·m<sup>-2</sup>·h<sup>-1</sup>·bar<sup>-1</sup> for the reference membrane), higher rejection of MgSO<sub>4</sub> (93–98 % compared to 92 % for the reference membrane), higher rejection of PEG-300 (98 % compared to the 96 % for the reference membrane) and dyes with large positively charged organic ion, higher Mg<sup>2+</sup>/Li<sup>+</sup> separation factor (18–38 compared to 8 for the reference membrane) and better antifouling performance.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"716 ","pages":"Article 136752"},"PeriodicalIF":4.9,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143714715","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}
Nanofibers have emerged as sought-after candidates for novel wound dressings because of their favorable drug delivery, moisture balance, and cellular interactions to cover and remedy injuries. Nevertheless, the precise control of therapeutic agents over the release kinetics has remained challenging. Herein, we investigate the preparation and release profile of curcumin as an anti-inflammatory medicine from core-shell nanofibers, seeking an enhanced skin wound dressing with drug-delivery properties. We design an encapsulated drug-metal complex within a coaxial scaffold based on chitosan, poly(ɛ-caprolactone) (PCL), and zinc oxide (ZnO) nanoparticles. Our results indicate that the diameter of nanofibers changed by almost 18 % upon the addition of curcumin and ZnO nanoparticles, which is attributed to their effect on the viscosity of polymers. The in vitro degradation implies low decomposition over 1200 h due to an encapsulated, drug-loaded core with a hydrophobic PCL shell. Incorporating ZnO also yields a nearly twofold increase in antibacterial efficacy to nanofibers and decelerates their degradation rate, relying on the interaction and chemical stability of nanoparticles induced into the chitosan core. Entailed with six theoretical models, the in vitro drug release profile unveils a mild burst release of curcumin in the early phase of drug delivery. Hence, the antibacterial chitosan/PCL nanofibers loaded with curcumin have potential applications in wound care.
{"title":"Preparation and structural analyses of antimicrobial core-shell chitosan-polycaprolactone nanofibers for controlled curcumin release","authors":"Pezhman Mosallanezhad , Nariman Rajabifar , Amir Rostami , Zahed Ahmadi , Ramin Taghdimi , Hossein Nazockdast","doi":"10.1016/j.colsurfa.2025.136736","DOIUrl":"10.1016/j.colsurfa.2025.136736","url":null,"abstract":"<div><div>Nanofibers have emerged as sought-after candidates for novel wound dressings because of their favorable drug delivery, moisture balance, and cellular interactions to cover and remedy injuries. Nevertheless, the precise control of therapeutic agents over the release kinetics has remained challenging. Herein, we investigate the preparation and release profile of curcumin as an anti-inflammatory medicine from core-shell nanofibers, seeking an enhanced skin wound dressing with drug-delivery properties. We design an encapsulated drug-metal complex within a coaxial scaffold based on chitosan, poly(ɛ-caprolactone) (PCL), and zinc oxide (ZnO) nanoparticles. Our results indicate that the diameter of nanofibers changed by almost 18 % upon the addition of curcumin and ZnO nanoparticles, which is attributed to their effect on the viscosity of polymers. The <em>in vitro</em> degradation implies low decomposition over 1200 h due to an encapsulated, drug-loaded core with a hydrophobic PCL shell. Incorporating ZnO also yields a nearly twofold increase in antibacterial efficacy to nanofibers and decelerates their degradation rate, relying on the interaction and chemical stability of nanoparticles induced into the chitosan core. Entailed with six theoretical models, the <em>in vitro</em> drug release profile unveils a mild burst release of curcumin in the early phase of drug delivery. Hence, the antibacterial chitosan/PCL nanofibers loaded with curcumin have potential applications in wound care.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"716 ","pages":"Article 136736"},"PeriodicalIF":4.9,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715245","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}
扫码关注我们
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号