Pub Date : 2025-04-17DOI: 10.1016/j.colsurfa.2025.136974
Mengshi Chen, Zihan Kang, Jingjing Ning, Ni Qin, Dinghua Bao
A novel method was established to create ZnO/ZIF-8 core/shell heterostructured film piezo-photocatalysts for highly efficient removal of pollutants from water. This method was inspired by distinctive pore structure of ZIF-8 and has the advantage of simple and quick synthesis. In this work, ZnO/ZIF-8 heterostructure thin films were created by growing ZIF-8 metal organic framework in-situ on inverse opal structure ZnO films, which also served as the porous template and zinc source of ZIF-8 simultaneously. Thus, the ZnO/ZIF-8 core/shell heterostructure is composed of ZnO core and ZIF-8 shell. The inverse opal structure enhances the process of light absorption, and the heterostructure is crucial for enhancing the carrier concentration. The ZnO/ZIF-8 heterostructure films exhibit significant degradation capacity towards Rhodamine B (RhB) and tetracycline (TC). Under UV light and ultrasound, the degradation efficiency of ZnO/ZIF-8 heterostructure is much higher than that of ZnO film and ZIF-8 film for RhB solution, indicating that the heterostructure films have a great potential for use in the field of water pollution prevention. This study not only presents an effective method for quickly creating heterostructures, but also demonstrates a path for improving the piezo-photocatalytic efficiency by manipulating the morphology and structure of ZnO/ZIF-8.
{"title":"Rapid construction of inverse opal structured ZnO/ZIF-8 heterostructure films with multi-stage pore structure for highly efficient purification of wastewater through piezo-photocatalysis","authors":"Mengshi Chen, Zihan Kang, Jingjing Ning, Ni Qin, Dinghua Bao","doi":"10.1016/j.colsurfa.2025.136974","DOIUrl":"10.1016/j.colsurfa.2025.136974","url":null,"abstract":"<div><div>A novel method was established to create ZnO/ZIF-8 core/shell heterostructured film piezo-photocatalysts for highly efficient removal of pollutants from water. This method was inspired by distinctive pore structure of ZIF-8 and has the advantage of simple and quick synthesis. In this work, ZnO/ZIF-8 heterostructure thin films were created by growing ZIF-8 metal organic framework in-situ on inverse opal structure ZnO films, which also served as the porous template and zinc source of ZIF-8 simultaneously. Thus, the ZnO/ZIF-8 core/shell heterostructure is composed of ZnO core and ZIF-8 shell. The inverse opal structure enhances the process of light absorption, and the heterostructure is crucial for enhancing the carrier concentration. The ZnO/ZIF-8 heterostructure films exhibit significant degradation capacity towards Rhodamine B (RhB) and tetracycline (TC). Under UV light and ultrasound, the degradation efficiency of ZnO/ZIF-8 heterostructure is much higher than that of ZnO film and ZIF-8 film for RhB solution, indicating that the heterostructure films have a great potential for use in the field of water pollution prevention. This study not only presents an effective method for quickly creating heterostructures, but also demonstrates a path for improving the piezo-photocatalytic efficiency by manipulating the morphology and structure of ZnO/ZIF-8.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"719 ","pages":"Article 136974"},"PeriodicalIF":4.9,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143851541","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 : 2025-04-17DOI: 10.1016/j.colsurfa.2025.136965
Qin-Yu Xing , Jun-Feng Su , Xin-Yu Wang , Qian Sun , Rong-Yue Shao , Sen-Kai Xu , Zhi-Yong Tan
In recent years, the use of waste cooking oils as bitumen rejuvenators has become a prominent research focus in the fields of environmental science and materials engineering. This approach not only addresses the problem of waste oil disposal but also facilitates bitumen recycling. In this study, we aimed to prepare microencapsulated waste soybean cooking oil (microWSCOs) using widely available sources in China, achieving in situ aging delay in bitumen. Optical microscopy and SEM analysis confirmed that the microWSCOs exhibited a spherical core-shell structure with no observable damage. FT-IR and EDS analyses revealed that the shell consisted of HMMM and PVA in varying proportions, where cross-linked HMMM formed the skeleton of the shell material, and PVA gel filled the pores of the HMMM skeleton, acting as permeation channels for WSCO release. TGA analysis demonstrated that the microWSCOs exhibited thermal stability capable of withstanding temperatures exceeding 200 °C while maintaining structural integrity in bitumen. Nano-XCT and SEM imaging showed uniform dispersion of microWSCOs in bitumen with intact interfacial structure. The permeation rate of WSCO through the shell was governed by the PVA content, where higher PVA content resulted in more oil permeation channels. Fluorescence microscopy confirmed the release process of WSCO in bitumen. Under high-temperature conditions, the diffusion rate decreased due to the thermal expansion of PVA gel, which obstructed the oil permeation channels. Since PVA is hydrophilic, oil molecules could not diffuse through it. At lower temperatures, PVA gel contracted upon freezing, reopening the oil permeation channels and enabling WSCO release. Mechanical property and softening point measurements of microWSCO/bitumen samples demonstrated that WSCO release significantly mitigated bitumen aging, effectively restoring bitumen performance.
{"title":"Environment-friendly microcapsules containing waste soybean cooking oil as an anti-aging rejuvenator for bitumen","authors":"Qin-Yu Xing , Jun-Feng Su , Xin-Yu Wang , Qian Sun , Rong-Yue Shao , Sen-Kai Xu , Zhi-Yong Tan","doi":"10.1016/j.colsurfa.2025.136965","DOIUrl":"10.1016/j.colsurfa.2025.136965","url":null,"abstract":"<div><div>In recent years, the use of waste cooking oils as bitumen rejuvenators has become a prominent research focus in the fields of environmental science and materials engineering. This approach not only addresses the problem of waste oil disposal but also facilitates bitumen recycling. In this study, we aimed to prepare microencapsulated waste soybean cooking oil (microWSCOs) using widely available sources in China, achieving in situ aging delay in bitumen. Optical microscopy and SEM analysis confirmed that the microWSCOs exhibited a spherical core-shell structure with no observable damage. FT-IR and EDS analyses revealed that the shell consisted of HMMM and PVA in varying proportions, where cross-linked HMMM formed the skeleton of the shell material, and PVA gel filled the pores of the HMMM skeleton, acting as permeation channels for WSCO release. TGA analysis demonstrated that the microWSCOs exhibited thermal stability capable of withstanding temperatures exceeding 200 °C while maintaining structural integrity in bitumen. Nano-XCT and SEM imaging showed uniform dispersion of microWSCOs in bitumen with intact interfacial structure. The permeation rate of WSCO through the shell was governed by the PVA content, where higher PVA content resulted in more oil permeation channels. Fluorescence microscopy confirmed the release process of WSCO in bitumen. Under high-temperature conditions, the diffusion rate decreased due to the thermal expansion of PVA gel, which obstructed the oil permeation channels. Since PVA is hydrophilic, oil molecules could not diffuse through it. At lower temperatures, PVA gel contracted upon freezing, reopening the oil permeation channels and enabling WSCO release. Mechanical property and softening point measurements of microWSCO/bitumen samples demonstrated that WSCO release significantly mitigated bitumen aging, effectively restoring bitumen performance.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"718 ","pages":"Article 136965"},"PeriodicalIF":4.9,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143850431","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 : 2025-04-17DOI: 10.1016/j.colsurfa.2025.136963
Haoyu Chen , Shunxian Zhang , Yu Zhang , Qian Ao , Hailan Lian , Liang Chen
Water-based adhesives are extensively used in the field of wood processing industry. The addition of crosslinking agents based on reactive isocyanates is key to improving the performance of water-based adhesives, while intense and non-uniform reactions can lead to short operation periods and uncontrollable product quality. Herein, this study proposes a green and low-temperature deblocking blocked isocyanate to address this issue. Through Density Functional Theory (DFT) calculations and experimental validation, vanillin was selected as a low-temperature deblocking agent (130 ℃) from lignin-derived phenolic monomers. A novel water-dispersible blocked isocyanate (WDBI) emulsion was successfully prepared using vanillin and HDI trimer. The performance of WDBI, evaluated through appearance, particle size, and zeta potential analyses, showed that WDBI-1 (R=1:0.7) and WDBI-2 (R=1:0.8) achieved good dispersibility and storage stability for over four months. The WDBI emulsions were used as crosslinking agents to formulate water-based composite adhesives with the white latex (EVA), reaching maximal pot life of 7 days. The plywood specimens manufactured using the composite adhesive showed enhanced bonding strength, particularly for wet strength. The maximum wet strength of the plywood was 1.28 MPa, exceeding the Chinese national standard (GB/T 9846–2015).This study confirmed the low-temperature deblocking performance of water-dispersible blocked isocyanate (WDBI), which can be used to formulate high-performance water-based adhesives for clean and green production of Wood-based panel.
{"title":"Synthesis and crosslinking applications of a lignin-derived phenolic monomer-blocked water-dispersible isocyanate","authors":"Haoyu Chen , Shunxian Zhang , Yu Zhang , Qian Ao , Hailan Lian , Liang Chen","doi":"10.1016/j.colsurfa.2025.136963","DOIUrl":"10.1016/j.colsurfa.2025.136963","url":null,"abstract":"<div><div>Water-based adhesives are extensively used in the field of wood processing industry. The addition of crosslinking agents based on reactive isocyanates is key to improving the performance of water-based adhesives, while intense and non-uniform reactions can lead to short operation periods and uncontrollable product quality. Herein, this study proposes a green and low-temperature deblocking blocked isocyanate to address this issue. Through Density Functional Theory (DFT) calculations and experimental validation, vanillin was selected as a low-temperature deblocking agent (130 ℃) from lignin-derived phenolic monomers. A novel water-dispersible blocked isocyanate (WDBI) emulsion was successfully prepared using vanillin and HDI trimer. The performance of WDBI, evaluated through appearance, particle size, and zeta potential analyses, showed that WDBI-1 (R=1:0.7) and WDBI-2 (R=1:0.8) achieved good dispersibility and storage stability for over four months. The WDBI emulsions were used as crosslinking agents to formulate water-based composite adhesives with the white latex (EVA), reaching maximal pot life of 7 days. The plywood specimens manufactured using the composite adhesive showed enhanced bonding strength, particularly for wet strength. The maximum wet strength of the plywood was 1.28 MPa, exceeding the Chinese national standard (GB/T 9846–2015).This study confirmed the low-temperature deblocking performance of water-dispersible blocked isocyanate (WDBI), which can be used to formulate high-performance water-based adhesives for clean and green production of Wood-based panel.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"718 ","pages":"Article 136963"},"PeriodicalIF":4.9,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143842569","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 : 2025-04-16DOI: 10.1016/j.colsurfa.2025.136899
Hao Li, Kun Xie, Pei Shi, Chaoyang Wang, Long Lin, Dongxia Xu
The catalytic activity of MXene catalysts for oxygen reduction and oxygen evolution reaction (ORR and OER) is limited by the coordination environment of the active center. However, the mechanism of how vacancy-induced reconstruction catalysts promote ORR/OER remains unclear. Here, we exploit oxygen vacancies in Mo2CO2 to reveal the influence of defects in the reconstruction process and the limitations of active center coordination environments with different TM atom compositions on the catalytic process. Through theoretical calculations, we found that the enhanced adsorption of OOH* by the oxygen defects during the catalytic process drove the catalyst's reconstruction, especially in the OER reaction, where the presence of O vacancies somewhat breaks the linkage between OH* and the overpotential and shows excellent OER activity. It was found that the Os-OV@Mo2CO2 catalyst had the highest activity with theoretical overpotentials ηORR = 0.43 V and ηOER = 0.49 V, which were close to or better than those of conventional Pt (111) and IrO2 (110). In addition, we systematically investigated the interactions between the catalyst and the reaction intermediates during the reaction process and elucidated the relationship between the changes in the free energies of different oxygenated intermediates. Overall, this study provides a feasible approach for the design and development of advanced bifunctional electrocatalysts, enriches the application of MXene, a novel two-dimensional material, in the electrochemical energy field, and provides theoretical experience for the design of defective MXene catalysts.
{"title":"First-principles study of precise O vacancy-deficient MXene as an ORR/OER bifunctional catalyst","authors":"Hao Li, Kun Xie, Pei Shi, Chaoyang Wang, Long Lin, Dongxia Xu","doi":"10.1016/j.colsurfa.2025.136899","DOIUrl":"10.1016/j.colsurfa.2025.136899","url":null,"abstract":"<div><div>The catalytic activity of MXene catalysts for oxygen reduction and oxygen evolution reaction (ORR and OER) is limited by the coordination environment of the active center. However, the mechanism of how vacancy-induced reconstruction catalysts promote ORR/OER remains unclear. Here, we exploit oxygen vacancies in Mo<sub>2</sub>CO<sub>2</sub> to reveal the influence of defects in the reconstruction process and the limitations of active center coordination environments with different TM atom compositions on the catalytic process. Through theoretical calculations, we found that the enhanced adsorption of OOH* by the oxygen defects during the catalytic process drove the catalyst's reconstruction, especially in the OER reaction, where the presence of O vacancies somewhat breaks the linkage between OH* and the overpotential and shows excellent OER activity. It was found that the Os-O<sub>V</sub>@Mo<sub>2</sub>CO<sub>2</sub> catalyst had the highest activity with theoretical overpotentials η<sup>ORR</sup> = 0.43 V and η<sup>OER</sup> = 0.49 V, which were close to or better than those of conventional Pt (111) and IrO<sub>2</sub> (110). In addition, we systematically investigated the interactions between the catalyst and the reaction intermediates during the reaction process and elucidated the relationship between the changes in the free energies of different oxygenated intermediates. Overall, this study provides a feasible approach for the design and development of advanced bifunctional electrocatalysts, enriches the application of MXene, a novel two-dimensional material, in the electrochemical energy field, and provides theoretical experience for the design of defective MXene catalysts.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"718 ","pages":"Article 136899"},"PeriodicalIF":4.9,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143842573","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 : 2025-04-16DOI: 10.1016/j.colsurfa.2025.136967
Samah Shabana , Hamed I. Hamouda , Heng Yin , Samia Hamouda , Busati Ahmed , Mohamed H. El-Sayed , Zhe Chi , Chenguang Liu
Marine phospholipid (MPL) nanoliposomes represent a new frontier in drug delivery systems, offering unique bio-functional and physicochemical properties. This study developed orally administered MPL nanoliposomes to enhance apremilast delivery and bioavailability in inflamed bowel disease (IBD). Drug release studies showed effective gastric protection (21.2 ± 0.4 % release at pH 1.2 after 2 h) and substantial release (96.4 ± 0.3 %) at pH 6.8 over 12 h. The optimized formulation (4 % drug w/w) showed remarkable stability over 6 weeks of storage at 4 °C. Apr/MPL nanoliposomes up to 300 µg/mL showed great cytocompatibility to RAW 264.7 macrophages and Caco2 intestinal cells. Furthermore, the formulation exhibited superior anti-inflammatory effects, significantly reducing nitric oxide (NO) production and downregulating pro-inflammatory cytokines (TNF-α, IL-1β, IL-6) in lipopolysaccharide (LPS)-stimulated RAW 264.7 macrophages. In vivo, Apr/MPL nanoliposomes improved recovery in a dextran sulfate sodium (DSS)-induced ulcerative colitis model, outperforming free apremilast. These findings underscore MPL nanoliposomes as a promising pharmacological tool for managing inflammation and a versatile drug delivery system for IBD.
{"title":"Exploiting marine phospholipid nanoliposomes for enhanced apremilast delivery and therapeutic efficacy in inflammatory bowel disease","authors":"Samah Shabana , Hamed I. Hamouda , Heng Yin , Samia Hamouda , Busati Ahmed , Mohamed H. El-Sayed , Zhe Chi , Chenguang Liu","doi":"10.1016/j.colsurfa.2025.136967","DOIUrl":"10.1016/j.colsurfa.2025.136967","url":null,"abstract":"<div><div>Marine phospholipid (MPL) nanoliposomes represent a new frontier in drug delivery systems, offering unique bio-functional and physicochemical properties. This study developed orally administered MPL nanoliposomes to enhance apremilast delivery and bioavailability in inflamed bowel disease (IBD). Drug release studies showed effective gastric protection (21.2 ± 0.4 % release at pH 1.2 after 2 h) and substantial release (96.4 ± 0.3 %) at pH 6.8 over 12 h. The optimized formulation (4 % drug w/w) showed remarkable stability over 6 weeks of storage at 4 °C. Apr/MPL nanoliposomes up to 300 µg/mL showed great cytocompatibility to RAW 264.7 macrophages and Caco2 intestinal cells. Furthermore, the formulation exhibited superior anti-inflammatory effects, significantly reducing nitric oxide (NO) production and downregulating pro-inflammatory cytokines (TNF-α, IL-1β, IL-6) in lipopolysaccharide (LPS)-stimulated RAW 264.7 macrophages. <em>In vivo</em>, Apr/MPL nanoliposomes improved recovery in a dextran sulfate sodium (DSS)-induced ulcerative colitis model, outperforming free apremilast. These findings underscore MPL nanoliposomes as a promising pharmacological tool for managing inflammation and a versatile drug delivery system for IBD.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"719 ","pages":"Article 136967"},"PeriodicalIF":4.9,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143856096","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 : 2025-04-16DOI: 10.1016/j.colsurfa.2025.136956
Zijing Wang , Junlong Li , Tianyu Duan , Chenyu Fu , Chunxing Wu , Yidian Wang , Chunfang Li , Peizhi Guo , Tianrong Zhan , Dongxiang Li
Metal nanoclusters have attracted considerable interest due to their unique fluorescence properties in the fields of environmental monitoring, chemical detection and biosensing. In this study, we developed a rapid synthesis method for highly red-emitting gold nanoclusters (AuNCs) via direct reduction of precursor HAuCl4 by sodium borohydride in presence of glutathione (GSH) at 0 °C. Our results demonstrated that the precursor quality had an important effect on the luminescence properties of the AuNCs, only the samples derived from high-purity precursors (99.9 % and 99.99 %) emitted strong red fluorescence. The obtained AuNCs can be excited in a broad range of 250–600 nm and can emit fluorescence of 560–730 nm. The maximum fluorescence quantum yield of the AuNCs derived from 99.99 % precursor achieved a high value of 9.98 %. Additionally, these fluorescent nanoclusters exhibited high selectivity toward Hg2+ by quenching. A linear calibration range of 10–100 μM Hg2+ was demonstrated with a limit of detection (LOD) of 1.45 μM using the as-obtained AuNCs as fluorescence probes, and in a narrowed range of 1–25 μM Hg2+, a LOD of 0.13 μM was determined using the diluted nanoclusters as probes. These results offer a significant reference for the synthesis and application of the AuNCs as fluorescence nanoprobes.
{"title":"Highly red-emitting gold nanoclusters rapidly synthesized in aqueous phase: Effects of precursor quality and detection of Hg2+","authors":"Zijing Wang , Junlong Li , Tianyu Duan , Chenyu Fu , Chunxing Wu , Yidian Wang , Chunfang Li , Peizhi Guo , Tianrong Zhan , Dongxiang Li","doi":"10.1016/j.colsurfa.2025.136956","DOIUrl":"10.1016/j.colsurfa.2025.136956","url":null,"abstract":"<div><div>Metal nanoclusters have attracted considerable interest due to their unique fluorescence properties in the fields of environmental monitoring, chemical detection and biosensing. In this study, we developed a rapid synthesis method for highly red-emitting gold nanoclusters (AuNCs) via direct reduction of precursor HAuCl<sub>4</sub> by sodium borohydride in presence of glutathione (GSH) at 0 °C. Our results demonstrated that the precursor quality had an important effect on the luminescence properties of the AuNCs, only the samples derived from high-purity precursors (99.9 % and 99.99 %) emitted strong red fluorescence. The obtained AuNCs can be excited in a broad range of 250–600 nm and can emit fluorescence of 560–730 nm. The maximum fluorescence quantum yield of the AuNCs derived from 99.99 % precursor achieved a high value of 9.98 %. Additionally, these fluorescent nanoclusters exhibited high selectivity toward Hg<sup>2+</sup> by quenching. A linear calibration range of 10–100 μM Hg<sup>2+</sup> was demonstrated with a limit of detection (LOD) of 1.45 μM using the as-obtained AuNCs as fluorescence probes, and in a narrowed range of 1–25 μM Hg<sup>2+</sup>, a LOD of 0.13 μM was determined using the diluted nanoclusters as probes. These results offer a significant reference for the synthesis and application of the AuNCs as fluorescence nanoprobes.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"718 ","pages":"Article 136956"},"PeriodicalIF":4.9,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143842570","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 : 2025-04-16DOI: 10.1016/j.colsurfa.2025.136966
Qiang Zou , Linghui Luo , Shuaiqian Wang , Yudie Liu , Yuyou Chen , Yuhan Zheng , Guilian Ran , Guangyi Wang , Qiang Zhang , Dayu Liu
This study examined the emulsification of lard with different concentrations of octenyl succinic acid starch (OSA-S) and whey isolate protein (WPI) and explored the interaction mechanism of the particles at the molecular level. Results showed that the emulsification activity index, emulsion stability index and absolute value of zeta potential all increased with increasing OSA-S to WPI ratio, peaking at 3.40 m²/g, 223.68 min, and 36.98 ± 0.46 mV at 5:1. OSA-S reduced the droplet diameter (532.34 ± 9.05 nm) and increased the oil–water interface thickness according to microscopic observation. The rheological results showed that OSA-S increased the elastic (G′) and viscous (G″) moduli and viscosity of the emulsions. The molecular simulation results confirmed that -OH, -COOH and C-O-C are mainly involved in the hydrogen bonding, hydrophobic and electrostatic forces between OSA-S and WPI. The molecular dynamics results showed that the β-lactoglobulin (β-LG)/OSA-S complex had lower binding energy (-46.941 kJ/mol) and RMSD (0.242 Å) with higher Rg (1.956 Å) as compared to β-LG. This study expanded the deep processing of lard industry and more applications of OSA-S.
{"title":"Preparation of emulsified lard based on octenyl succinic acid starch /whey isolate protein: Force on emulsification and interfacial properties","authors":"Qiang Zou , Linghui Luo , Shuaiqian Wang , Yudie Liu , Yuyou Chen , Yuhan Zheng , Guilian Ran , Guangyi Wang , Qiang Zhang , Dayu Liu","doi":"10.1016/j.colsurfa.2025.136966","DOIUrl":"10.1016/j.colsurfa.2025.136966","url":null,"abstract":"<div><div>This study examined the emulsification of lard with different concentrations of octenyl succinic acid starch (OSA-S) and whey isolate protein (WPI) and explored the interaction mechanism of the particles at the molecular level. Results showed that the emulsification activity index, emulsion stability index and absolute value of zeta potential all increased with increasing OSA-S to WPI ratio, peaking at 3.40 m²/g, 223.68 min, and 36.98 ± 0.46 mV at 5:1. OSA-S reduced the droplet diameter (532.34 ± 9.05 nm) and increased the oil–water interface thickness according to microscopic observation. The rheological results showed that OSA-S increased the elastic (G′) and viscous (G″) moduli and viscosity of the emulsions. The molecular simulation results confirmed that -OH, -COOH and C-O-C are mainly involved in the hydrogen bonding, hydrophobic and electrostatic forces between OSA-S and WPI. The molecular dynamics results showed that the β-lactoglobulin (β-LG)/OSA-S complex had lower binding energy (-46.941 kJ/mol) and RMSD (0.242 Å) with higher Rg (1.956 Å) as compared to β-LG. This study expanded the deep processing of lard industry and more applications of OSA-S.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"718 ","pages":"Article 136966"},"PeriodicalIF":4.9,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143839236","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 : 2025-04-16DOI: 10.1016/j.colsurfa.2025.136829
A. Felipe Cruz P. , Luciana Pellegrini Malpiedi , R. Dario Falcone
This study explores the solubilization capabilities and properties of reverse micelles (RMs) formed by the non-ionic surfactant Tergitol 15-S-7 (TG7) in various non-polar solvents, including n-heptane (HP), toluene, and isopropyl myristate (IPM), both in the absence and presence of water (quantified as W0 = [water]/[TG7]). The findings reveal that TG7 forms stable, transparent solutions with HP and IPM, exhibiting a greater capacity for water solubilization (W0 of 6 and 5, respectively) compared to toluene (W0 = 0.5). Dynamic light scattering measurements indicate the formation of RMs, with sizes increasing as water content increases. The sizes observed range from 9 nm to 38 nm for systems formulated in HP, while those in IPM exhibit sizes range from 8 nm to 19 nm. This suggests that water molecules are being entrapped and interacting with the surfactant monolayer. Additionally, spectroscopic studies using two highly sensitive probes demonstrate structural variations and differing properties at the micellar interfaces, influenced by the choice of non-polar solvent. Interestingly, we found that the HP/TG7/water RMs exhibit a microenvironment similar to that of n-pentanol. In contrast, the IPM/TG7/water RMs displayed characteristics resembling those of 3-propanone or chloroform at the interface. Proton NMR analysis of entrapped water and TG7's polar head group reveals distinct external solvent penetration, emphasizing the impact of solvent interactions on micellar properties. Therefore, in the HP/TG7 RMs, the protons associated with the entrapped water shift from 4.27 ppm to 4.78 ppm as W0 changes. In contrast, within a similar water content for the IPM/TG7 system, the values shift from 3.96 ppm to 4.32 ppm. NOESY experiments indicated that IPM penetrates the interface more significantly than HP, leading to changes in the interface in both RMs. Overall, this research clarifies the fundamental behavior of TG7-based RMs and underscores their potential applications in Green Chemistry.
{"title":"The impact of non-polar solvent choice on the formation and structural properties of reverse micelles created by the non-ionic surfactant Tergitol 15-S-7","authors":"A. Felipe Cruz P. , Luciana Pellegrini Malpiedi , R. Dario Falcone","doi":"10.1016/j.colsurfa.2025.136829","DOIUrl":"10.1016/j.colsurfa.2025.136829","url":null,"abstract":"<div><div>This study explores the solubilization capabilities and properties of reverse micelles (RMs) formed by the non-ionic surfactant Tergitol 15-S-7 (TG7) in various non-polar solvents, including n-heptane (HP), toluene, and isopropyl myristate (IPM), both in the absence and presence of water (quantified as W<sub>0</sub> = [water]/[TG7]). The findings reveal that TG7 forms stable, transparent solutions with HP and IPM, exhibiting a greater capacity for water solubilization (W<sub>0</sub> of 6 and 5, respectively) compared to toluene (W<sub>0</sub> = 0.5). Dynamic light scattering measurements indicate the formation of RMs, with sizes increasing as water content increases. The sizes observed range from 9 nm to 38 nm for systems formulated in HP, while those in IPM exhibit sizes range from 8 nm to 19 nm. This suggests that water molecules are being entrapped and interacting with the surfactant monolayer. Additionally, spectroscopic studies using two highly sensitive probes demonstrate structural variations and differing properties at the micellar interfaces, influenced by the choice of non-polar solvent. Interestingly, we found that the HP/TG7/water RMs exhibit a microenvironment similar to that of n-pentanol. In contrast, the IPM/TG7/water RMs displayed characteristics resembling those of 3-propanone or chloroform at the interface. Proton NMR analysis of entrapped water and TG7's polar head group reveals distinct external solvent penetration, emphasizing the impact of solvent interactions on micellar properties. Therefore, in the HP/TG7 RMs, the protons associated with the entrapped water shift from 4.27 ppm to 4.78 ppm as W<sub>0</sub> changes. In contrast, within a similar water content for the IPM/TG7 system, the values shift from 3.96 ppm to 4.32 ppm. NOESY experiments indicated that IPM penetrates the interface more significantly than HP, leading to changes in the interface in both RMs. Overall, this research clarifies the fundamental behavior of TG7-based RMs and underscores their potential applications in Green Chemistry.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"718 ","pages":"Article 136829"},"PeriodicalIF":4.9,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143848660","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 : 2025-04-16DOI: 10.1016/j.colsurfa.2025.136896
Lingxi Ouyang , Xueyu Ji , Beng Hau Tan , Hongjie An
Surface nanobubbles in chemical environments significantly influence various industrial processes. In the chemical industry, oxygen scavengers are frequently added to deaerators and boilers to remove dissolved oxygen, improving thermal efficiency and protecting equipment. We hypothesised that oxygen scavengers could cause surface nanobubbles to vanish by consuming dissolved oxygen in the surrounding liquids. This study investigates the morphological changes of surface air nanobubbles in a solution containing an oxygen scavenger (sodium sulphite) by atomic force microscopy. Contrary to our hypothesis, the experiment showed that surface nanobubbles did not eventually dissolve upon exposure to the oxygen scavenger; instead, they grew. To explore the gas sources that flew into surface bubbles, we estimated the saturation level of dissolved nitrogen by simulating microbubble shrinking in the oxygen scavenger solutions with the Epstein-Plesset model. The estimated saturation level of dissolved nitrogen is ∼ 1.12, suggesting oxygen depletion creates an oversaturation of dissolved nitrogen. These findings provide crucial insights into the fundamental understanding of nanobubble stability and offer potential strategies for controlling surface nanobubbles in practical applications.
{"title":"Super stable surface nanobubbles under chemical stimuli","authors":"Lingxi Ouyang , Xueyu Ji , Beng Hau Tan , Hongjie An","doi":"10.1016/j.colsurfa.2025.136896","DOIUrl":"10.1016/j.colsurfa.2025.136896","url":null,"abstract":"<div><div>Surface nanobubbles in chemical environments significantly influence various industrial processes. In the chemical industry, oxygen scavengers are frequently added to deaerators and boilers to remove dissolved oxygen, improving thermal efficiency and protecting equipment. We hypothesised that oxygen scavengers could cause surface nanobubbles to vanish by consuming dissolved oxygen in the surrounding liquids. This study investigates the morphological changes of surface air nanobubbles in a solution containing an oxygen scavenger (sodium sulphite) by atomic force microscopy. Contrary to our hypothesis, the experiment showed that surface nanobubbles did not eventually dissolve upon exposure to the oxygen scavenger; instead, they grew. To explore the gas sources that flew into surface bubbles, we estimated the saturation level of dissolved nitrogen by simulating microbubble shrinking in the oxygen scavenger solutions with the Epstein-Plesset model. The estimated saturation level of dissolved nitrogen is ∼ 1.12, suggesting oxygen depletion creates an oversaturation of dissolved nitrogen. These findings provide crucial insights into the fundamental understanding of nanobubble stability and offer potential strategies for controlling surface nanobubbles in practical applications.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"719 ","pages":"Article 136896"},"PeriodicalIF":4.9,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143858851","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}
L-Lysine is an essential amino acid that cannot be synthesized artificially and must be obtained through dietary sources. Therefore, it is crucial to detect its content in food. In this study, we present a simple and effective method for the chiral fluorescence recognition of L-lysine utilizing a chiral covalent organic framework. Initially, we synthesize a TAB-DFP-COF incorporating a pyridine group, which is subsequently modified with Eu3+ to produce the Eu3+@TAB-DFP-COF ratiometric fluorescent sensor. This sensor is capable of compensating for various factors unrelated to the target due to its built-in self-correction function. This fluorescent sensor is not only easy to synthesize but also exhibits rapid response time. Additionally, it demonstrates good selectivity and high sensitivity. This work represents the first application of covalent organic framework materials for the detection of L-lysine without chiral modification, thereby offering a novel approach for the detection of chiral amino acids in the future.
{"title":"Construction of Eu3+ modified covalent organic framework and fluorescence detection of L-lysine","authors":"Yanyan Ma, Hao Guo, Yingfei Hui, Liping Peng, Dengke Zhuang, Wenting Niu, Yu Yan, Yanrui Hao, Wu Yang","doi":"10.1016/j.colsurfa.2025.136969","DOIUrl":"10.1016/j.colsurfa.2025.136969","url":null,"abstract":"<div><div>L-Lysine is an essential amino acid that cannot be synthesized artificially and must be obtained through dietary sources. Therefore, it is crucial to detect its content in food. In this study, we present a simple and effective method for the chiral fluorescence recognition of L-lysine utilizing a chiral covalent organic framework. Initially, we synthesize a TAB-DFP-COF incorporating a pyridine group, which is subsequently modified with Eu<sup>3+</sup> to produce the Eu<sup>3+</sup>@TAB-DFP-COF ratiometric fluorescent sensor. This sensor is capable of compensating for various factors unrelated to the target due to its built-in self-correction function. This fluorescent sensor is not only easy to synthesize but also exhibits rapid response time. Additionally, it demonstrates good selectivity and high sensitivity. This work represents the first application of covalent organic framework materials for the detection of L-lysine without chiral modification, thereby offering a novel approach for the detection of chiral amino acids in the future.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"718 ","pages":"Article 136969"},"PeriodicalIF":4.9,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143842572","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