INDUSTRIAL CROPS AND PRODUCTS
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2024
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IF 5.6
Baohong Zheng,Long Chen,Lijuan He,Hao Wang,Hu Li,Heng Zhang,Song Yang
Biodiesel , a significant kind of renewable clean energy source, has largely alleviated the environmental pressures that are now taking a sinister form. In this study, N-doped sulfonated hydrothermal carbon (NTC-SO 3 H) which came from chitosan, was fabricated by facile hydrothermal carbonization (HTC) technique and successfully applied to biodiesel production from oleic acid (OA). Notably, NTC-SO 3 H had abundant active sites (3.4 mmol/g), favorable specific surface area (15.4 m 2 /g), and suitable mesoporous structure (12.1 nm). Hence, NTC-SO 3 H showed a good catalytic efficiency under mild conditions (82.0 °C for 4.3 h, 98.6% yield) via response surface methodology optimization (RSM). Bracingly, the esterification reaction conformed to pseudo-first-order kinetics with a low activation energy (Ea) of 31.5 kJ/mol. Furthermore, NTC-SO 3 H showed good reusability after 5 cycles and great universality in substrate expansion, demonstrating its industrial-scale applications. Moreover, the cost analysis of catalyst preparation (6.5 $/kg) indicated that the developed catalyst has reduced production costs and proved profitable to commercialize. Therefore, NTC-SO 3 H prepared from renewable biomass by a facile HTC method has a high and stable activity and shows great potential in industrial biodiesel production, advancing the process of carbon neutrality.
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FOOD HYDROCOLLOIDS
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2024
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IF 11
Siqun Liu,Meirong Xu,Yuxin Guo,Yexia Xiao,Huifang Wang,Xianghua Gao,Xiaojie Lian,Baolong Niu,Wenfeng Li
Ag-based materials have potent antibacterial effects , but their potential toxicity problems should not be underestimated, so it is urgent to construct a safe and non-resistant dual antibacterial system. In this study, we utilized tea polyphenols (TPs) and montmorillonite (MMT) to control the growth of silver nanoparticles (AgNPs). Then, we combined the AgNPs with arginine to construct a synergistic antibacterial system of arginine-modified chitosan-assisted AgNPs-loaded MMT (ACS/G/AgNPs@MMT). The results showed that AgNPs with a uniform dispersion of 6.72 ± 4.66 nm and ACS with a grafting degree of 0.153 were successfully prepared, and the synergistic antibacterial effect between ACS and AgNPs@MMT was verified by the FIC index, and the antibacterial rate could still reach 99.9 % when the additions of ACS and AgNPs@MMT were reduced by 75 % and 79.1 %, respectively. The ACS/G/AgNPs@MMT-2 composite film exhibited excellent mechanical properties, water vapor/UV barrier properties, antioxidant activity , degradation properties, and biosafety. In addition, the synergistic effect enabled the ACS/G/AgNPs@MMT-2 film to achieve antibacterial rates of 99.24 ± 0.19 % against E. coli and 99.49 ± 0.40 % against S. aureus , and the film exhibited excellent long-lasting antibacterial performance due to the slow release of Ag + (only about 11.27 % of Ag + was released in 20 days). Finally, the ACS/G/AgNPs@MMT-2 film could significantly improve the food preservation ability. In conclusion, this study indicates that the film could be used as a novel antibacterial packaging material .
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JOURNAL OF POLYMERS AND THE ENVIRONMENT
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2024
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IF 4.7
Liu Yaqing,Cui Yixin,Meng Huibiao,Long Ke,Shao Linjun,Xing Guiying
Palladium plays an important role in modern industry, agriculture and medicine. The direct discharge of palladium results in serious environmental pollution and loses of precious palladium metal. Herein, kaolin/chitosan hybrid nanofibers were successfully prepared to recover Pd 2+ cations from aqueous solution. Chitosan and kaolin mixture was first electrospun into nanofibers with citric acid as the in situ crosslinking agent and poly(ethylene oxide) as the co-spinning polymer. Then, the chitosan molecules in these hybrid nanofibers were in situ crosslinked by critic acid at elevated temperatures to endow these nanofibers with excellent solvent resistance. Their structure characterization was conducted by Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and positron annihilation lifetime spectroscopy (PLAS). The adsorption performances of these fibrous adsorbents were carefully investigated and optimized (e.g. kaolin content, temperature, pH of solution and initial Pd 2+ concentration). The adsorption results demonstrated that incorporation of kaolin powders into the nanofibers could enhance the adsorption capacity from 31 mg/g to 64 mg/g. Thermodynamic parameters studies revealed the endothermic and spontaneous natures of the adsorption process of Pd 2+ cations on these hybrid nanofibers. The Pd 2+ adsorption behavior of this fibrous adsorbent fitted well with the second-order kinetic model, suggesting the chemical adsorption behavior of Pd 2+ cations on this fibrous adsorbent. Moreover, this fibrous adsorbent can be easily regenerated and reused at least three times without significant loss of initial adsorption capacities. These results clearly indicate that this fibrous chitosan/kaolin hybrid absorbent holds great potential in the recovery of precious palladium cations from aqueous solution.
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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2025
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IF 7.8
Youming Zhu,Xudong Zheng,Guomeng Li,Xi Zhang,Lin Guo,Jinfeng Mei,Zhongyu Li
The development of smart responsive materials is crucial for not only achieving high-performance adsorption of rare earth elements but also enabling green regeneration. Herein, we report the fabrication of ultraviolet (UV)-light responsive imprinted chitosan-based aerogel (UV-IA) and near-infrared (NIR)-light responsive imprinted chitosan-based aerogel (NIR-IA) for the selective adsorption and eco-friendly desorption of Dy(III). Both light-responsive imprinted chitosan-based aerogels were prepared by low-temperature thermally induced phase separation (LT-TIPs), and NIR-IA was prepared by adding the photo-thermal conversion material croconaine. The chitosan aerogels with nanofiber network pore structure were prepared by LT-TIPs. The adsorption capacities of 10 mg of UV-IA and NIR-IA were 76.32 mg g -1 and 76.11 mg g -1 under the condition of pH 5.0 and room temperature, respectively. The selective adsorption effect of UV-IA and NIR-IA on dysprosium ions was obviously better than other competitive ions, and their adsorption separation constants can reach 2408.45 mL g -1 and 2623.29 mL g -1 , respectively. The results showed that cinnamic acid in UV-IA changed to cis structure under UV irradiation, while croconaine in NIR-IA decomposed the chitosan/cinnamic acid conjugate by applying heat to it under NIR irradiation. These changes caused the imprint sizes of UV-IA and NIR-IA to be changed, realizing the green desorption of Dy(III). The best desorption rate of 88.64% was achieved by UV-IA. These materials provide a promising approach for the green and economical separation and recovery of Dy(III) from secondary resources.
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Nanomaterials
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2024
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IF 4.4
Xinrui Guo,Zhongxin Zhang,Zhanyan Liu,Hui Huang,Chunlei Zhang,Huaxin Rao
Non-fluorinated chitosan-based proton exchange membranes (PEMs) have been attracting considerable interest due to their environmental friendliness and relatively low cost. However, low proton conductivity and poor physicochemical properties have limited their application in fuel cells. In this work, a reinforced nanofiller (sulfonated CS/GO, S-CS/GO) is accomplished, for the first time, via a facile amidation and sulfonation reaction. Novel chitosan-based composite PEMs are successfully constructed by the incorporation of the nanofiller into the chitosan matrix. Additionally, the effects of the type and amount of the nanofillers on physicochemical and electrochemical properties are further investigated. It is demonstrated that the chitosan-based composite PEMs incorporating an appropriate amount of the nanofillers (9 wt.%) exhibit good membrane-forming ability, physicochemical properties, improved proton conductivity, and low methanol permeability even under a high temperature and low humidity environment. When the incorporated amounts of S-CS/GO are 9 wt.%, the proton conductivity of the composite PEMs was up to 0.032 S/cm but methanol permeability was decreased to 1.42 × 10 −7 cm 2 /s. Compared to a pristine CS membrane, the tensile strength of the composite membrane is improved by 98% and the methanol permeability is reduced by 51%.
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PubMed
高影响因子
POLYMER
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2025
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IF 4.5
Peng He,Guanghui Gu,Youyin Xu,Gang Wei,Mingjin Xu
Skin wound healing faces challenges of bacterial infection and environmental stimulation, and hence the design of biocompatible wound dressings with antibacterial and self-healing abilities is promising. Herein, we report the design and synthesis of bioactive composite hydrogels (CHP) with chitosan (CS), hyaluronic acid (HA), and polypeptide (PP). Ascribing to dynamic molecular cross-linking, the fabricated CHP hydrogels exhibit good stability, excellent biocompatibility, injectability, self-healing ability, and antimicrobial activity. Microscopic analysis indicates that the CHP hydrogels maintain a 3D porous dual-network structure, and the porosity of hydrogels is related to the content of PP as the reinforcement. Antimicrobial evaluation of the CHP hydrogels demonstrates significant efficacy against E. coli and S. aureus , with improved performance at higher PP concentration. Furthermore, the hydrogels show enhanced cytocompatibility, minimal hemolysis, and improved in vitro cell proliferation. The tests with wound mouse models indicate that the CHP hydrogels can accelerate wound healing effectively, enhance angiogenesis, and promote tissue regeneration. Histological evaluation confirms complete epidermal regeneration, improved collagen deposition, and increased protein expression. The designed CHP hydrogels present potential clinical applications as a wound dressing material to meet the needs of rapid and effective wound healing.
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CHEMICAL ENGINEERING SCIENCE
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2024
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IF 4.1
Shasha Li,Liangzhi Qiao,Jiahong Hu,Jiawei Zhang,Zhangyong Tang,Kaifeng Du
The conflict between macroporous structure and high specific surface area strongly limited the dynamic adsorption performance of chromatographic media. Here, macroporous and high-specific-surface-area cellulose microspheres (PCMs) are prepared by using semi-dissolved chitosan as a dual-functional template and subsequently functionalized with diethylaminoethyl (DEAE) as anion exchangers for protein separation. The dual-functional template strategy leverages dissolved chitosan nanofibers as meso/micropore templates and the undissolved chitosan particles as macropore templates. The macropores of DEAE-PCMs (average size: 0.4–1.2 μm) efficiently decrease mass transfer resistance for fast uptake kinetics. The high specific surface area (272.34 m 2 /g) provides sufficient ligand sites for ensuring exceptional adsorption capacities. Therefore, the chitosan bifunctional templated PCMs, possessing a macro/meso/microporous structure, are promising candidates for high-performance chromatographic media.
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MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Li Gao,Yitong Lu,Huan Yang,Le Guo,Siyuan Chen,Jie Liu
A magnetic hydrogel beads were synthesized by incorporating Fe 3 O 4 nanoparticles and NH 2 -UiO-66 into low-cost chitosan via acid-dissolved/alkali-solidified self-shaping method conveniently. The combination of NH 2 -UiO-66 with chitosan may enhance the rigidity and adsorption capacity of the composite. The fabricated magnetic NH 2 -UiO-66-chitosan were characterized using scanning electron microscopy, fourier transform-infrared spectroscopy, X-ray diffraction, vibrating sample magnetometer, thermal gravimetric analysis, X-ray photoelectron spectroscopy, and N 2 adsorption–desorption experiments.. Combined with high-performance liquid chromatography-fluorescence detector, these hydrogel beads were applied to magnetic solid-phase extraction of four aflatoxins. The maximum adsorption capacity was 18.3 mg/g, and the adsorption mechanism was discussed. The main extraction parameters were optimized, including adsorbent amount, adsorption time, adsorption temperature, pH value, eluent, and desorption time. Under the optimized conditions, the low limits of detection (S/N = 3) were 0.08 ∼ 0.80 μg/kg. The recoveries of spiked grain samples (rice, glutinous rice, wheat, and soybean) were between 70.8 % and 117.0 % with 1.7 ∼ 15.0 % relative standard deviation (n = 5). Therefore, the magnetic NH 2 -UiO-66-chitosan beads are suitable for the determination of aflatoxins in complicated real grain samples.
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VACUUM
·
2024
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IF 3.8
Difei Wang,Wei Chang,Zhiyuan Ren,Xiaojing Zhang,Yanpin Du,Bin Liu,Yunfeng Li
A novel visible-light-responsive ZnIn 2 S 4 /chitosan graphene aerogel (ZCGA) was prepared using a low-temperature hydrothermal self-assembly method for the adsorption and degradation of tetracycline. Infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS) indicated interactions between ZnIn 2 S 4 and chitosan graphene aerogel (CGA). Under the irradiation of a 500 W xenon lamp, ZCGA exhibited excellent adsorption and photocatalytic degradation performance for tetracycline, with a removal rate exceeding 90 % within 180 min. This significant performance improvement is attributed to the high carrier transport properties of CGA, which greatly enhanced the activity of the photocatalytic reaction and also showed high efficiency in removing other types of organic pollutants. Radical trapping experiments further confirmed that the superoxide anion (·O 2 − ) is the main active species in the photocatalytic process. In addition, the monolithic aerogel has good recyclability and mechanical stability. This study not only demonstrates the great potential of ZCGA in the field of photocatalysis but also provides new ideas for designing efficient, recyclable, and visible light-responsive photocatalysts.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Manjila Adhikari,Omar Mohammad Atta,Mohmed Sobhy Kishta,Mostafa Maboruk,Zhijun Shi,Guang Yang
The demand for advanced biomaterials in medical treatments is rapidly expanding. To address this demand, a nanocomposite of cellulose nanofiber (CNF) with chitosan (Ch) and graphene oxide (GO) was developed for burn wound treatment. The CNF-Ch-GO nanocomposites were characterized and their biological properties were evaluated. Microscopic images showed a uniform distribution of CNF, Ch, and GO with a porous structure. ATR-FTIR and XRD analyses confirmed the chemical structures, while a thermogravimetric study confirmed the stability of CNF-Ch-GO nanocomposite under a N 2 atmosphere. The synthesized CNF-Ch-GO nanocomposite exhibited rapid absorption, absorbing 1781.7 ± 53.7 % PBS in 2 min. It demonstrated a Young's modulus of 11.90 ± 0.06 MPa in a hydrated condition, indicating its mechanical stability in water. Furthermore, it displayed excellent biocompatibility and hemocompatibility with 96.23 ± 12.21 % cell viability and 0.21 ± 0.08 % of hemolysis. Additionally, the blood clotting index of CNF-Ch-GO was comparable to that of standard dressing gauze. To enhance antimicrobial efficacy, CNF-Ch-GO was conjugated with lysozyme. This biotic and abiotic conjugation resulted in 92.17 % ± 3.02 % and 94.99 ± 2.1 % eradication of Escherichia coli and Staphylococcus aureus , respectively. The enhanced antimicrobial properties, biocompatibility, and mechanical stability of the superabsorbent CNF-Ch-GO nanocomposite indicate its significant potential for advanced burn wound healing applications.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Wei Su,Ying Zhang,Yiqing Chen,Lini Huo,Fangzhou Wen,Jinyun Cai,Qikun Gong,Peiyuan Li
Bacterial infections impede skin wound healing, and antibacterial hydrogels have garnered significant attention in the field of wound care due to their combined therapeutic effects. In this study, an intelligent, responsive AC-Gel@Cur-Au hydrogel was developed using temperature-sensitive agarose and pH-responsive chitosan as the structural framework, infused with Gel@Cur and AuNR. The AC-Gel@Cur-Au hydrogels demonstrated excellent mechanical properties, swelling capacity, tissue adhesion, and biodegradability. Upon irradiation, the hydrogels exhibited effective photodynamic therapy (PDT), photothermal therapy (PTT), and heat-sensitive gel-sol conversion capabilities, allowing for the release of curcumin in response to temperature and pH changes. Through these synergistic effects, the AC-Gel@Cur-Au hydrogel displayed a rapid bactericidal effect against Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ), effectively treating persistent biofilms. In vivo studies using a full-thickness defect model of S. aureus infection demonstrated that the hydrogel possessed strong antibacterial activity and enhanced wound healing capabilities, significantly reducing inflammation. Furthermore, the hydrogel significantly promoted granulation tissue formation, collagen deposition, and angiogenesis. Importantly, all the components of the AC-Gel@Cur-Au hydrogel were found to be non-cytotoxic, indicating good biocompatibility. This safe, synergistic antibacterial hydrogel holds great promise for the treatment of bacterial infections in wound healing.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
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IF 8.5
Shuo Yang,Jianhao Liang,Nan Wang,Xiao-Kun Ouyang,Junhua Hu
Infected wounds are highly susceptible to bacterial contamination, which not only delays the healing process but also leads to a range of complications. NO is one of the most widely used gas molecules in wound treatment strategies due to its potent antibacterial and healing-promoting properties. However, excessive NO in infected wounds can damage cellular components and exacerbate inflammation. Therefore, precise control of NO dosage and targeted delivery to the wound site are crucial for effective treatment. Herein, a cationic hydrogel was constructed using modified guar gum and polyvinyl alcohol to enhance antibacterial effects, with guanidine-modified chitosan (Met-CS) and the photosensitizer sodium copper chlorophyllin (SCC) incorporated to create a light-triggered NO release system. Both in vitro and in vivo experiments confirmed that the proposed hydrogel exhibits excellent antibacterial performance, anti-inflammatory effects, and wound healing capabilities, demonstrating its potential for precise therapeutic applications.
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