INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Jiayue Wang,Reili Li,Jinke Wang,Yujie Gao,Meiyi Wang,Huashan Wang
As an essential material for manufacturing lithium batteries, the demand of lithium is increasing, which means novel extracting method from various lithium-containing solutions is necessary. Spiropyran molecules undergo a photoisomerization reaction under light, transitioning from a closed-ring form (colorless) to an open-ring form (colored), generating multiple coordination sites to form coordination bonds with metal ions. In this paper, a polyacrylamide/carboxymethyl chitosan composite aerogel grafted with photoresponsive spiropyragroups (Fe 3 O 4 /CNTs@PAM/CS-SP), used for extracting lithium from solutions, was prepared by dual cross-linking and vacuum freeze-drying. Batch adsorption experimental results showed that the incorporation of Fe 3 O 4 nanoparticles further enhances its adsorption capability, as it enables rapid separation of the aerogel from water using an external magnetic field and also improves the adsorption efficiency due to its magnetic properties. The aerogel exhibits good adsorption capacity in the pH range of 9–12 and shows selectivity for Li in simulated brine, achieving a maximum adsorption capacity of 176.5 mg/g at 35 °C and a Li concentration of 1 g/L. The preparation of this aerogel offers a novel and effective approach to creating environmentally friendly adsorbents, providing a new method for extracting lithium from lithium-containing solutions.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Jiaxiang Liang,Yanping Hou,Jie Sun,Hongxiang Zhu,Han Pang,Jinhang Yang,Mi Wang,Jiangli Sun,Jianhua Xiong,Wenyu Huang,Zebin Yu,Shuangfei Wang
This work aimed at exploring the effect of optimal overpotential discrepancy between two-electron oxygen reduction reaction (OP 2eORR ) and metal reduction reaction (OP MRR ) of the cathode on electro-Fenton (EF) system performance, and proposing strategy to eliminate overpotential discrepancy. Therefore, series of vanadium-doped chitosan carbon aerogel (xCCA-V) cathodes were fabricated by controlling graphitization degree. With carbonized temperature of 900 °C, the OP 2eORR of the 900CCA-V was −0.5 V vs. SCE, the same with the OP for vanadium reduction reaction (OP VRR ). This identical OP of the 900CCA-V endowed excellent EF performance, with ciprofloxacin removal of 98.1%, and TOC removal significantly increased by 41.8% compared with Ferrum-doped CCA (900CCA-Fe). Density functional theory calculation revealed efficient active sites for H 2 O 2 adsorption on the 900CCA-V surface. Degradation pathways of ciprofloxacin and intermediates toxicity were determined. This work provides inspiration for developing strategy for overpotential regulation and design novel and efficient cathodes for enhancing EF performance.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2025
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IF 2.8
Shu Hong,Yu Zhang,Zhenbo Liu,Chenming Liu,Henrikki Liimatainen,Xueqing Lian
Phase-change materials (PCMs) offer an appealing strategy for passive thermal energy storage, but conventional PCMs often suffer from limitations in thermal performance, supercooling, and structural stability. Herein, we engineered adjustable PCM nanocapsules deploying a novel ternary deep eutectic solvent (DES) system composed of capric acid, palmitic acid, and octadecane. The DES formulation exhibited a notably high latent heat of fusion of 225.1 J/g and phase-transition temperatures precisely tuned to the human comfort range ( T m = 23.5°C, T f = 22.6°C), surpassing many previously reported DESs (typically ≤ 207.2 J/g). The optimized DES was further encapsulated within a cross-linked chitosan shell to create nanocapsules with an average size of 240 nm with a high encapsulation efficiency (> 92%). These nanocapsules retained a latent heat of 207.0 J/g, among the highest reported for encapsulated PCMs, and exhibited exceptional thermal cycling stability over 100 heating/cooling cycles, with negligible phase-transition temperature shift and no observable leakage. Structural analyses confirmed successful DES encapsulation and uniform shell formation. The superior thermal storage capacity, structural integrity, and sustainability of the developed PCM nanocapsules establish them as strong candidates for next-generation smart thermal management systems in buildings and other advanced applications.
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Chemical Engineering Journal Advances
·
2025
·
IF 7.1
Wuxin Hou,Jizhuang Zuo,Yongle Gao,Yao Wang,Li Liu
The generation of humins by-products in biorefinery is often unavoidable. We here report the valorization of chitosan-derived humins for removal of heavy metal ions to enhance the atomic economy of the biomass conversion. Chitosan-derived humins were synthesized by catalysis of oxalic acid (OA), whereby the adsorption performance for Cd(II), Cr(III) and Cr(VI) was explored. The adsorption data were well fitted by the pseudo-second-order kinetic model, complemented by the Freundlich and Temkin isotherm models, revealing maximum adsorption capacities of humins for heavy metal ions as follows: 358.7 mg/g for Cr(VI), 152.6 mg/g for Cd(II), and 40.2 mg/g for Cr(III). The mechanistic studies revealed that the adsorption of Cd(II) and Cr(III) by humins mainly occurs through ion exchange (carboxyl groups) and surface complexation (hydroxyl, carbonyl, and amino groups). In comparison, the adsorption of Cr(VI) by humins involves electrostatic attraction, alongside ion exchange and surface complexation. After carbonization and activation, the specific surface area increased markedly, however the adsorption capacity decreased owing to reduced oxygen- and nitrogen-containing functional groups. Competitive adsorption studies, industrial wastewater experiments, and cyclic adsorption tests demonstrate that humins exhibit remarkable adsorption performance even in complex environments. This work highlights that chitosan-derived humins are promising adsorbents for the remediation of heavy metal ions.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Kexin Yi,Shiyuan Miao,Bixing Yang,Sijie Li,Yiwen Hu,Yujie Lu
As a naturally derived biomacromolecule, chitosan is widely utilized in food preservation. However, the chitosan derived from silkworm pupae and its application in food preservation are relatively unexplored. To obtain chitosan with enhanced preservation properties, silkworm pupae chitosan was extracted using dual-frequency ultrasound-assisted chemical and enzymatic methods, followed by a comparative analysis of their physicochemical properties, biological activity, and preservation efficacy on strawberries. Compared with the commercial chitosan, the yield, physicochemical properties, and biological activity of silkworm pupae chitosan using the dual-frequency ultrasound-assisted enzymatic method were increased, exhibiting a solubility of 98.1 % and a deacetylation degree of 99.12 %. The silkworm pupae chitosan demonstrated the highest antioxidant activity and effective microbial inhibition at the concentration of 1 % (w/w). When applied as a coating solution for strawberry preservation, this chitosan significantly reduced weight loss, titratable acid degradation, and polyphenol consumption. Furthermore, it decreased the decay rate by 50 % and extended shelf life by two-fold compared to untreated samples. The dual-frequency ultrasound-assisted enzymatic method provides an eco-friendly approach for chitosan extraction, with silkworm pupae-derived chitosan showing excellent potential as a biodegradable food preservative.
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Foods
·
2025
·Vol. 14
·期 18
·3149
·
IF 5.1
Haixin Zhao,Jinlong Li,Shuang Cong,Hongman Hou,Gongliang Zhang,Jingran Bi
In this study, the effect of cationic participation on the swelling behavior and pH-responsive release characteristics of polyelectrolyte hydrogel based on gelatin (Gel), sodium alginate (Alg), and carboxymethyl chitosan (CMCS) was explored. The shell–core morphology of the cationic coordination hydrogels was prepared by introducing Na + , Ca 2+ , and Fe 3+ into the crosslinking system, which significantly altered the inherent pH-responsive swelling properties of Gel/Alg-CMCS hydrogel. The modified hydrogel demonstrated a release resistance of carvacrol (CAR) under acidic conditions while facilitating rapid release under neutral conditions. Notably, the CAR release profile was substantially modified by the distinct anti-swelling properties of cationic coordination hydrogels. In particular, Gel/Alg-CMCS-Fe 3+ hydrogel exhibited high accumulative release of 58.34% at pH 1.0 while maintaining a minimal release degree of merely 7% in weakly acidic and neutral environments. These intriguing findings provide valuable insights into intelligent active delivery for future applications.
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Journal of Coatings Technology and Research
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2025
·
IF 2.8
Fang Jingting,Wang Xiuwu,Wang Jing,Han Yingying,Chen Tao
Using petroleum-based plastic materials poses many serious problems, including resource consumption and environmental pollution. Paper-based materials are good substitutes for plastic products because of their biodegradability, resource-richness, and recyclability. Paper’s poor water and oil resistance limits its wide application in food packaging. The use of water and oil repellents is an effective strategy to improve the barrier properties of paper. However, fluorine-containing oil repellents produce perfluorooctanoic acid/perfluorooctanesulfonyl compounds (PFOA/PFOS), which are hazardous to human beings and the environment, during the preparation and use of the repellents. Therefore, developing non-toxic, harmless, and biodegradable bio-based waterproof and oil-resistant coatings is the mainstream trend in the future. In this study, simple and environmentally friendly fluorine-free waterproof and oil-resistant coatings for food wrapping paper were developed by grafting oleyl alcohol onto chitosan using the ring-opening reaction of epichlorohydrin, and the reagents successfully adhered to the surface of the paper. The successful synthesis of waterproof and oil-resistant coatings was confirmed by nuclear magnetic resonance (NMR) and infrared (IR) analyses. The chitosan-based coatings (CHI-g-xOA, x = 1/8, 1/4, 1/2, 1) with different oleyl alcohol contents were prepared by the facile method. The obtained coated paper CHI-g-xOA-p ( x = 1/4) has not only excellent oil resistance (Kit rating value of 11 ± 1.0/12), which meets the food-grade oil-proof requirement, but also has excellent water resistance (Cobb 60 value of 11.86 ± 1.60 g/m 2 ). Compared with the uncoated paper, the tensile strength and water vapor transmission rate of the coated paper were significantly improved.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Xiangtao Liu,Sisi Zhang,Haiyan Zheng,Mengyao Bian,Linna Qian,Weijia Zhao,Ying Shi,Zhifang Wu
Dental caries, primarily induced by plaque biofilm, is a significant challenge in oral health due to the disruption of the equilibrium between mineralization and demineralization processes. The primary objective in caries management is to preserve biofilm homeostasis while promoting the repair and regeneration of dental hard tissues, thereby restoring the structural integrity and functionality of the affected teeth. This study aimed to develop a multifunctional film with mineralizing and antibacterial abilities by incorporating ultrasmall amorphous calcium phosphate (ACP) nanoclusters (~1 nm) into hydroxypropyl trimethyl ammonium chloride chitosan (HACC) matrix. The ACP nanoclusters were synthesized using polyacrylic acid and polyaspartic acid as stabilizers and were homogeneously dispersed into the HACC matrix to form ACP@HACC film. The capacity for Ca and P ions release from ACP@HACC film was evaluated by inductively coupled plasma-mass spectrometry, demonstrating a sustained ion release over a period of 7 days. The ACP@HACC film induced the mineralization of type I collagen fibrils within 4 days. In vivo studies further confirmed the occurrence of dentin remineralization after 4 days. The remineralization process mediated by the ACP@HACC film significantly restored the elastic modulus and microhardness of demineralized dentin. Additionally, cytotoxicity assessments confirmed the excellent biocompatibility of the ACP@HACC film. Dentin treated with the ACP@HACC film demonstrated antibacterial ability against Streptococcus mutans in vitro. The ACP@HACC film integrates the dual functionalities of mineralization and antibacterial activity while maintaining excellent biocompatibility. This innovative approach shows potential for the treatment of early carious lesions, offering a clinically viable supplement to conventional restorative strategies.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Xinglei Li,Yiyang Shen,Shengye You,Luxuan Shao,Rui Bao,Diya Zhang,Wei Dong,Jun Lin
Available remedies for diabetic oral mucosa wounds often prove inadequate, chiefly due to complications like bacterial infiltration, oxidative harm, and hindered angiogenesis throughout wound restoration. This study addresses the significant gap in effective therapeutic options by developing an injectable hydrogel, DCE1, designed to enhance healing in diabetic oral ulcers. Here, we present DCE1, composed of a polysaccharide matrix of dialdehyde xanthan gum and quaternary chitosan, integrated with epigallocatechin-3-gallate nanoparticles. DCE1 generates a shielding hydrogel barrier when administered locally, exhibiting potent sterilization and reactive oxygen species-clearing properties. Such benefits shift the wound healing process from an inflammatory to a proliferative stage. Notably, the DCE1 dressing is fully biodegradable post-treatment, ensuring complete absorption by the body after fulfilling its therapeutic role. In conclusion, our findings demonstrate that the DCE1 hydrogel significantly accelerates oral mucosa wound repair in both in vitro and in vivo models. This advancement represents a promising therapeutic strategy for diabetic oral ulcers, ultimately contributing to improved clinical outcomes in the management of this challenging condition.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Dingyang Chen,Zixu Ren,Minsi Shi,Rui Zhao
With the fast-growing accumulation of precious metals, especially gold ions, in wastewater and electronic waste, achieving rapid and selective gold ions capture from water while maintaining high adsorption capacity is of vital importance to the environment and economy. Herein, a self-standing, quaternary phosphonium functionalized chitosan-based electrode (MTP-CS-CC) is proposed and fabricated via coating functional materials on carbon cloth for the electrochemical capture of Au(III) ions. Abundant quaternary phosphonium sites as nanotraps in MTP-CS-CC under the action of electric field deliver a fast extraction rate with high Au(III) removal efficiency (>99.5 %), a competitive uptake capacity (2114 mg g −1 ), superior selectivity, and long-term recycling stability. In-depth exploration of relevant mechanism by multiple characterizations and density functional theory (DFT) calculations illustrates that the capture of Au(III) ions by MTP-CS-CC electrode involves the electrosorption and electroreduction processes. In addition, when used as electrodes to recover gold from real e-waste leaching solution, the purity of recovered gold from computer central processing unit (CPU) boards reaches up to 23.8 Karat (99.17 % pure). Our work puts forward a facile strategy for preparing chitosan-based electrodes that can be innovatively used for the precious metal recovery and circular economy for recycling resources.
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APPLIED SURFACE SCIENCE
·
2016
·
IF 3.15
Yizhou Zhu,Xiangmei Liu,Kelvin W.K. Yeung,Paul K. Chu,Shuilin Wu
One-dimensional (1D) nanostructures of ZnO using atomic layer deposition (ALD) on chitosan (CS) modified carbon nanotubes (CNTs) were first introduced onto the surfaces of biomedical implants. When the content of ZnO is not sufficient, CNTs can strengthen the antibacterial activity against E. coli and S. aureus by 8% and 39%, respectively. CS can improve the cytocompatibility of CNTs and ZnO. The amount of Zn content can be controlled by changing the cycling numbers of ALD processes. This hybrid coating can not only endow medical implants with high self-antibacterial efficacy against Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ) of over 73% and 98%, respectively, but also regulate the proliferation and osteogenic differentiation of osteoblasts by controlling the amount of ZnO.
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JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2016
·Vol. 309
·期 3
·1217-1226
·
IF 0.983
Dong Zhi-min,Qiu Yan-fang,Dai Ying,Cao Xiao-hong,Wang Lin,Wang Pan-feng,Lai Zhong-jun,Zhang Wen-long,Zhang Zhi-bin,Liu Yun-hai,Le Zhang-gao
For the selective adsorption of U(VI) from aqueous solutions, the hydrothermal cross-linking chitosan (HCC) and its phosphorylation production (HCC-TPP) were synthesized by hydrothermal reaction. The monolayer maximum capacity of HCC-TPP was improved from 200 mg g −1 of HCC to 409.2 mg g −1 at 298 K. Calculated thermodynamic parameters showed endothermic property of the adsorption process, while kinetic parameters indicated that the interaction followed pseudo-second kinetic model. Selective separation of U(VI) from effluent by HCC-TPP was achieved.
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