FOOD HYDROCOLLOIDS
·
2025
·
IF 12.4
Yantao Liu,Xuxi Ma,Chen Huang,Yujia Wan,Qiuyu Deng,Siqi Chen,Jun Tian,Fusheng Sun,Zhengqi Wu,Duoxia Xu,Nan Yang
The interfacial behaviors of microgels at the oil-water interface were significantly affected by the properties of the oil phase, which in turn influence their emulsification ability. In this study, the effects of oil polarity on the interfacial behaviors of hydrophobic modified chitosan microgels ( h -CSMs) at five typical oil-water interfaces (decane, 1-chlorodecane, decanol, medium-chain triglycerides (MCT), and paraffin) were investigated. The interfacial adsorption results show that h -CSMs can rapidly adsorb onto the selected oil-water interfaces, with the ability to reduce surface tension ( γ ) increased as the polarity of the oil phase increased. The saturation adsorption interfacial pressure ( π ) has a power law index (α) equal to 1.19 with the initial oil-water interfacial tension ( γ ow ) indicating that the h -CSMs are soft particles with interfacial deformability between surfactants and flexible proteins. The h -CSMs formed strong viscoelastic interfacial layers at all of the oil-water interfaces except decanol with the dilatational modulus ( E ) positively correlated to the thickness and amount of adsorbed microgels at the interface. From the interfacial microstructure analysis, weakly polar oils (such as paraffin, n-decane) contributes to the expansion of h -CSMs particles, thereby forming a thicker adsorption layer. The polar oil phase suppresses the excessive expansion of h -CSMs, resulting in a compact and thinnest adsorption layer (such as decanol). Emulsion stability studies showed that the polarity and viscosity of the oil phase, and the interfacial properties of the h -CSM film affect the stability of the emulsions, but the interfacial viscoelasticity dominated. Paraffin emulsions (particularly the high internal phase emulsions, HIPEs) stabilized by h -CSMs exhibit superior storage, mechanical, thermal, and ion stability, but the addition of excessive salt ions will introduce emulsion instability by changing the charge properties and thus the morphology and interaction of the microgels at the interface.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Sijia Luo,Shenghe Zhang,Zhimin Song,Lei Song,Fukai Chu,Bibo Wang,Yuan Hu
Thermoplastic polyurethane (TPU) faces significant fire safety challenges due to its inherent flammability and toxic smoke emissions. To address this issue, a novel bio-based flame retardant, APP@CS-Ce, was developed via electrostatic self-assembly of chitosan (CS) and cerium ions (Ce 3+ ) onto ammonium polyphosphate (APP). This core-shell structure used chitosan derived from biomass as the carbon source and synergistically utilized the catalytic carbonization and free radical quenching functions of the rare earth element cerium (Ce 3+ ). Incorporating only 15 wt% APP@CS-Ce enabled TPU composites to achieve a UL-94 V-0 rating and a high limiting oxygen index (LOI) of 27.6 %. The char residues surged from 0.5 wt% (pure TPU) to 24 wt%, while peak heat release rate (PHRR) and total smoke production (TSP) decreased by 76 % and 61 %, correspondingly. Critically, CO emissions were reduced by 45 %, confirming effective toxicity suppression. The cerium ions further promoted graphitization of the char layer and catalyzed CO-to-CO 2 conversion, enhancing barrier properties and combustion efficiency. Unlike conventional additives, APP@CS-Ce preserved mechanical integrity, with elongation at break decreasing merely 0.5 % due to improved interfacial compatibility. This work demonstrates a sustainable, high-performance flame-retardant strategy combining biomass resources with rare-earth catalysis for next-generation TPU applications.
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Zelin Liao,Hui Yu,Gaohong He,Xuehua Ruan,Hailong Li,Jinhui Dou,Xiujuan Zhang
Blood-contacting membranes require hydrophobicity to prevent leakage but suffer from poor hemocompatibility. Hydrophilic modification represents a key strategy to address this limitation. Herein, hydrophilic carboxymethyl-chitosan (CMCS) modification onto polyethersulfone (PES) membrane (CMCS-PES) was achieved via thermal-crosslinking and amidation reaction, followed by characterization through SEM, AFM, FTIR, XPS, BET, as well as water contact angle measurements, and systematic evaluation for its performance in hemocompatibility, antibacterial activity, long-term stability, and gas permeation. Compared with unmodified PES membranes, CMCS-PES membrane showed excellent hydrophilicity with surface water contact angle reduced from 84.3° to 30.9°, displayed improved hemocompatibility with bovine serum albumin adsorption decreased from 57.76 to 31.32 μg/cm 2 , bovine γ-globulin from 47.26 to 27.45 μg/cm 2 , hemolysis rate reduced from 0.9 % to 0.3 %, prolonged activated partial thromboplastin time by 12.4 s, lower blood fibrinogen level by 20 %, and exhibited good antibacterial activity with inhibition on E. coli growth by 28.9 % and S. aureus by 42.76%. Moreover, the CMCS-PES membrane still presents competitive gas permeation in comparison to other membranes investigated under similar conditions, and demonstrated excellent long-term stability in preventing blood leakage and platelet adhesion. This research provides an effective modification strategy for hemocompatibility improvement on blood-contacting membranes.
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DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yuchun Ren,Dandan Zhao,Fei Zhou,Zhengjun Gong,Dongmei Wang,Yingwei Xi,Zhenglian Wu,Li Yang,Yongsheng Fu,Chen Fu
Lithium is a critical strategic resource in the transition to clean energy, and developing efficient, sustainable recycling technologies is essential to achieving carbon neutrality goals. The study addresses challenges such as low lithium-ion concentrations and the presence of competing cations in shale gas produced water (SGPW). An innovative composite adsorbent enhanced by a hydrogen bond network, consisting of H 1.33 Mn 1.67 O 4 (HMO), MXene, and chitosan (CTS), is introduced. Directional bonding among MXene, CTS, and HMO forms an interpenetrating structure that stabilizes the HMO lattice, with only 0.005 % Mn loss after ten cycles. Adsorption tests with actual SGPW demonstrated that the material adsorbs lithium-ion capacity at 11.80 mg/g, exhibiting higher lithium selectivity compared to other cations. A laboratory-scale experiment was conducted using a fixed-bed filtration system, the most effective adsorbent reached saturation close to 52 h under a near approach velocity of 0.13 cm/min (hydraulic loading) with a full bed volume of 7.7 cm 3 , containing around 4.92 g of adsorbent. A novel material design paradigm for lithium extraction from neutral to alkaline wastewater is presented, combining high selectivity with long cycle life.
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高影响因子
CARBOHYDRATE POLYMERS
·
2012
·
IF 3.628
Ke Zhang,Pengyu Zhuang,Zhengke Wang,Youliang Li,Zhiqiang Jiang,Qiaoling Hu,Minying Liu,Qingxiang Zhao
For the development of biocompatible and degradable biomaterials, a kind of well-defined graft copolymer consisting of chitosan back-bone and amphiphilic PEO-PLLA-PEO branch chains was synthesized by Cu(0) catalyzed one-pot strategy combining “click” chemistry and single electron transfer-nitroxide radical coupling (SET-NRC) reaction. First, the precursors of 6-azide- N -phthaloyl-chitosan, TEMPO-PEO-alkyne and mPEO-PLLA-Br were designed and produced. Then, the one-pot coupling reactions between these precursors were performed in the presence of nanosized Cu and PMDETA. The efficiencies of the coupling reactions were greater than 90% determined by the FTIR and ESR spectra. The structure of graft copolymer with 43% of the grafting ratio was confirmed by the spectral analysis. This work provided a route to prepare chitosan graft copolymer.
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 4.3
Jinzhao Wang,Xiantao Zhang,Tingting Ren,Lanyue Zhang,Peng Liu,Xuejiao Hu,Lu Huang
Traditional photothermal membrane distillation (PMD) for seawater desalination suffers from low photothermal conversion efficiency and poor operational stability under high-salinity brine conditions. In response to these limitations, this study reports a hydrogel composite membrane (HCM) mediated photothermal membrane distillation device. The HCM consists of a chitosan/agarose hydrogel (CAH) layer, carbon nanotube (CNT) coating, and polytetrafluoroethylene (PTFE) hydrophobic membrane. The CNT layer significantly improves the photothermal conversion efficiency, achieving 98.5% solar absorption under standard solar irradiation. The CAH modulates intermediate water states by tuning the chitosan-to-agarose ratio, thereby reducing water evaporation enthalpy and enabling stable freshwater production. Under 1 kW m −2 solar intensity (i.e. 1 sun) for 1.5 h, the water flux of the device increased by 40.7% than pure CNT/PTFE membrane. Simultaneously, CAH employs its three-dimensional porous structure and abundant amino (–NH 2 ) and hydroxyl (–OH) groups to achieve synergistic salt rejection through electrostatic repulsion. The device achieved continuous and stable freshwater production in a 7 wt% NaCl solution, demonstrating outstanding salt-rejection properties. This study developed hydrogel composite membrane to enhance water flux and system stability in PMD, proposing novel concepts for performance enhancement of PMD.
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高影响因子
International Journal of Electrochemical Science
·
2023
·Vol. 6
·期 10
·4700-4713
·
IF 1.5
Lingli Wan,Yonghai Song,Haozhi Zhu,Yu Wang,Li Wang
Cytochrome c (Cyt c ) and horseradish peroxidase (HRP) were co-immobilized on graphene oxide (GO)-chitosan (CHIT) modified Au electrode and the electron-transfer between the two proteins was investigated. The GO-CHIT nanocomposite was assembled on an Au electrode which covered by a mixed self-assembled monolayer of mecraptoundecanoic acid (MUA) and 6-mercapto-1-hexanol (MCH) and coated with Cyt c . The GO-CHIT nanocomposite as a novel electrochemical platform designed by combining the biocompatibility of CHIT and the conductivity of GO was used for the immobilization of the redox enzymes. Based on electrostatic interactions, the Cyt c -HRP/GO-CHIT/Cyt c /MUA-MCH/Au electrode was constructed by a layer-by-layer technique. Electron transfer and electrocatalytic performances of the modified electrode were investigated. Results showed that direct electron transfer has been established for the bi-protein system and the average rate constant of electron transfer k s , (Cyt c - HRP) =2.63 s -1 was larger than those values at the electrodes modified with single protein (k s , (Cyt c ) =1.44 s -1 , ks, (HRP) =1.53 s-1). The bi-protein modified electrode exhibited good electrocatalytic response to reduction of oxygen (O 2 ) and hydrogen peroxide (H 2 O 2 ), suggesting that a third-generation biosensor could be obtained for the detection of O 2 and H 2 O 2 .
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高影响因子
CARBOHYDRATE POLYMERS
·
2018
·
IF 5.158
Ningxiao Yuan,Lu Xu,Bo Xu,Jianhao Zhao,Jianhua Rong
Chitosan derivative-based self-healable hydrogels with enhanced mechanical properties are reported, which were prepared by polymerization of acrylic acid (AAc) in 2-hydroxypropyltrimethyl ammonium chloride chitosan (HACC) solution. The PAAc/HACC hydrogels exhibit tensile fracture stress as high as 3.31 MPa and a Young's modulus of 2.53 MPa. They can maintain their original shape after 30 repeated compression cycles under various strain conditions, with a compression stress of more than 60 MPa at 99% strain. The damaged PAAc/HACC hydrogels can heal together in the presence of a NaCl salt solution with a self-healing efficiency of up to 61%. In addition, the PAAc/HACC hydrogels have high ionic conductivity and can serve as electrolytes for supercapacitors. The analysis suggests that all these good properties of the PAAc/HACC hydrogels mainly result from their high-density dynamic ionic interactions structure.
研究领域:
高分子材料科学
·
生物医学工程
·
功能材料
·
组织工程
·
药物递送系统
·
再生医学
·
电化学器件
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DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2019
·
IF 4.561
Guoli Chen,Kun Song,Xiaoming Huang,Wenbo Wang
Titanium dioxide (TiO 2 ) colloid was synthesized by using tetrabutyl titanate . TiO 2 (KH-570) intermediate was prepared by etherification reaction of TiO 2 colloid and KH-570. The CS-GMA intermediate was prepared by ring-opening reaction of chitosan (CS) and glycidyl methacrylate (GMA). Finally, copolymerization two intermediates obtain a new adsorbent, TiO 2 (KH-570)-g-(CS-GMA). The results manifest that the maximum adsorption amounts of toluene and Pb(II) are 56.62 mg/g and 623.56 mg/g, respectively. The adsorption of TiO 2 (KH-570)-g-(CS-GMA) adsorbent for toluene and Pb(II) accord with the pseudo-second-order kinetics mechanism and Langmuir equation, indicate that the TiO 2 (KH-570)-g-(CS-GMA) adsorbent has better adsorption effect on toluene and Pb(II).
研究领域:
环境科学
·
材料科学
·
化学工程
·
污染控制
·
吸附技术
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高影响因子
POLYMER BULLETIN
·
2014
·Vol. 71
·期 11
·2923-2944
·
IF 1.491
Yan Huiqiong,Chen Xiuqiong,Wu Tiantian,Feng Yuhong,Wang Chunxiu,Li Jiacheng,Lin Qiang
The surface modification with poly(methyl hydrosiloxane) (PMHS) using a grinding method as a pesticide carrier had been successfully achieved. The characteristics of the modified kaolin were represented by Fourier transform infrared, X-Ray diffraction, BET specific surface area measurements, laser particle size analysis, transmission electron microscopy and contact angle measurement. Subsequently, immobilization of acetamiprid onto clay’s surface was carried out by means of freeze-drying technology. And the drug-loaded clays were encapsulated in alginate-chitosan composite beads by extrusion into calcium chloride solution. The composite beads showed regularly spherical shapes and uniform sizes with diameters of 1.44 ± 0.24–1.75 ± 0.19 mm. The immobilization and release of acetamiprid were carried out to examine the effect of the modified kaolin on the properties of the composite bead. The results showed that the intensive force of superfine pulverization during the grinding process was effective to increase the specific surface areas of the modified kaolin with particle size reduction. The modified kaolins as promising carrier materials had improved the drug loading rate and encapsulation efficiency from 4.15 and 42.01 % for alginate-chitosan composite beads to 6.02 and 82.95 %, which were higher than 4.33 and 54.29 % for SA-CS-kaolin composite beads, respectively. The controlled-release formulation containing the modified kaolin had shown slow and sustained release properties to promote the efficient use of organic pesticide to reduce pollution effect on the environment.
研究领域:
材料科学
·
农业化学
·
药物递送系统
·
环境友好材料
·
粘土矿物加工
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DOI
高影响因子
CHEMOSPHERE
·
2023
·
IF 8.8
Lei Wu,Xiaolu Gong,Cong Ma,Lan Xu,Ming Li,Chen Lyu,Nan Sun
In this study, hydrogels generated by the Schiff base reaction between citral and chitosan (CS) were used for the first time to improve the anti-bacterial property of forward osmosis (FO) membranes. The composite membranes were characterized by scanning electron microscopy (SEM), Fourier transform infrared (FTIR), Water contact angle (WCA), Zeta potential and confocal laser scanning microscopic (CLSM). In the FO filtration experiment, the membrane performance of TFC-1 with 1 M sodium chloride solution as the draw solution and deionized water as the feed solution was the best, with the water flux of 25.54 ± 0.7 L m −2 h −1 and the reverse salt flux of 4.7 ± 0.4 g m −2 h −1 . Although the hydrogel coating produced a certain hydraulic resistance, the flux of the modified membrane was only reduced by about 8%, compared with the unmodified membrane. However, the anti-bacterial property ( Pseudomonas aeruginosa ) and anti-fouling properties (bovine serum protein and lysozyme protein) of the modified membranes were improved, showing good antibacterial properties (99%) and flux recovery rate (over 90%). The modified method has the advantages of easy access to raw materials, simple operation and no risk of secondary pollution, which can effectively reduce the cost of chemical cleaning and extend the service life of the membrane. The modification of membrane by chitosan-based hydrogel is a promising option in the field of membrane anti-bacteria.
研究领域:
材料科学
·
膜科学与技术
·
生物医学工程
·
环境功能材料
·
抗菌材料
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DOI
高影响因子
Food Bioscience
·
2026
·
IF 5.9
Wenqi Yin,David Julian McClements,Zhiheng Zhang,Hangyan Ji,Zhengyu Jin,Chao Qiu
This study aimed to develop and characterize novel chitosan (CS)-based composite films by incorporating metal-phenolic networks (MPNs) assembled from cinnamaldehyde (CA), tannic acid (TA), and five different metal ions (Ca 2+ , Mg 2+ , Zn 2+ , Cu 2+ , or Fe 3+ ). The objection was to evaluate the impact of metal ion type on the films' physicochemically and functional properties for potential active packaging application. The results demonstrated that the incorporation of cinnamaldehyde-tannic acid-metal (CTM) particles significantly enhanced the films’ performance. Notably, the Zn 2+ -based (CTZn) film exhibited the most pronounced improvement in tensile strength (269 % increase) and hydrophobicity (water contact angle = 97.50°). All CTM composite films showed enhanced thermal stability, reduced water vapor permeability, and excellent UV-blocking capacity compared to the pure CS film. Furthermore, the composite films displayed stronger antibacterial activity and higher antioxidant activity than the control. In conclusion, CTM networks, especially those involving Zn 2+ , effectively enhance the multifunctional properties of CS films, making the developed composite promising candidates for high-performance, active food packaging materials.
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高影响因子
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