MATERIALS RESEARCH BULLETIN
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2024
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IF 5.3
Wenshuang Chu,Kaifeng Wang,Siyu Liu,Yujie Chen,Hua Li,Hezhou Liu
Confronted with ever-increasing electromagnetic radiation problems, developing microwave absorbing materials with tunable effective absorption bandwidth (EAB) is in high demand. In this work, chitosan-derived carbon-based aerogel was synthesized by unidirectional freeze-drying and the following high-temperature carbonization process. The dielectric-magnetic coupling effect was facilitated by the construction of the 3D conductive network, along with the decoration of the Co nanoparticles and the doping of heteroatoms within the carbon-based framework. Therefore, the aerogel achieved minimum reflection loss intensity of -44.30 dB at 5.20 GHz when carbonizing the precursor at 800 °C. More significantly, the strain-responsive properties of the aerogel endows it with tailorable electromagnetic response behaviors, thereby controlling the effective absorption bandwidth covering from X band to Ku band. This work paves the way for designing next-generation microwave absorption materials with tunable microwave absorption bandwidth, catering to stringent practical requirements prospectively.
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Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Lirong Yang,Fengying Chen,DePing Chen,Jianguo Gao,Hui Ju,Jie Tang,Qiaoling Jiang,Xiaojun Wang
A novel amidoxime-modified chitosan (CS-AO) containing amidoxime, amino and Schiff base was prepared, by introducing diaminomaleonitrile (DAMN) which contains both amino and nitrile groups into chitosan. CS-AO has a very good synergistic uranium sorption property with high efficiency, with the maximum uranium sorption capacity up to 596 mg/g, and 243.2 μg/g in seawater; besides, after four cycles of sorption-desorption, more than 90 % of its initial uranium sorption capacity is still left. In addition, the uranium sorption of the adsorbent is mainly carried out through the coordination of amidoxime with uranium, followed by amino and Schiff base. The sorption process is fitted by pseudo-second-order kinetics, Langmuir and Sips isothermal models. It is controlled primarily by chemisorption , as well as monolayer sorption and multilayer sorption, which is a spontaneous endothermic process.
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ACS Biomaterials Science & Engineering
·
2024
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IF 5.4
Yixiao Chen,Guoqing Li,Yufeng Ge,Su Liu,Jian Weng,Jianjing Lin,Ao Xiong,Hui Zeng,Xinbao Wu,Jun Yang,Fei Yu
In this study, we explore the cartilage defect repair mechanism by phosphocreatine-grafted chitosan hydrogels loaded with berberine-treated ATDC5 cells (CSMP@BBR@ATDC5). Under the optimal concentrations of LPS and BBR ideal conditions, ATDC5 cell toxicity and proliferation were detected with AM/PI and EdU staining. Additionally, qPCR and Western blot were employed to detect the expression of the SIRT1/BMP4 signaling pathway and chondrogenic-related factors in ATDC5 cells. Moreover, BBR-treated ATDC5 was seeded into a phosphocreatine-grafted chitosan hydrogel system. Subsequently, the cartilage defect was established in mice. After 4, 8, and 12 weeks, knee specimens were collected to evaluate the repair of cartilage defects. According to our findings, BBR can increase ATDC5 viability by LPS treatment. Likewise, it upregulates the SIRT1/BMP4 signaling pathway expression and chondrogenic-related factors. Another, it was shown by histological observation that the cartilage defect had been repaired more effectively in the CSMP@BBR@ATDC5 group than in the other groups. Finally, the expressions of chondrogenic-related factors and SIRT1/BMP4 signaling pathway were upregulates in CSMP@BBR@ATDC5 than in other groups. In vitro, BBR protects inflammatory ATDC5 cells and maintains the expression of chondrogenic-related factors. Subsequently, we successfully use CSMP@BBR@ATDC 5 to repair knee cartilage defects in mice.
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PubMed
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JOURNAL OF MEMBRANE SCIENCE
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2025
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IF 9
Wei Luo,Sifan Gao,Linping Yan,Xuepin Liao,Bi Shi
The limited availability of terrestrial uranium resources poses significant challenges to the development of nuclear energy. Extracting uranium from Salt Lake water offers a new solution to address the shortage of uranium resources. This study used chitosan, a naturally adsorptive material, to create chitosan microporous membranes (CS) with polyethylene glycol as a porogen. Subsequently, a novel amidoxime-based chitosan microporous membrane adsorbent (CS-AO) was developed based on CS for uranium extraction from Salt Lake water. The CS-AO membrane's hydroxyl, amino, and amidoxime groups work synergistically to provide multiple binding sites, significantly enhancing its binding capacity for UO 2 2+ . Under optimal conditions (initial concentration 3.0 mmol L −1 , temperature 323 K, pH 6), the adsorption capacity reached 2.84 mmol g −1 , with rapid adsorption/desorption rates and good selectivity. At a uranium feed concentration of 0.05 mmol L −1 and flow rate of 1.0 mL min −1 , the treatment capacity was 1046.93 L m −2 . Moreover, when applied to actual brine collected from the Chaerhan Salt Lake in Golmud, Qinghai, China for uranium extraction, CS-AO achieves an extraction rate of 79.6 %. Additionally, CS-AO showed over 90 % antibacterial effects against E. coli and S. aureus , with excellent stability, making it suitable for long-term Salt Lake uranium extraction.
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JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
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2025
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IF 3.6
Sirui Chen,Chengao Li,Yanhong Teng,Huiqiong Wei,Cuixia Lu,Hua Yang
This study focuses on the preparation and evaluation of a catechol-modified hydroxypropyl chitosan/silver nanoparticle/phenylboronic acid alginate composite hydrogel (C/S/A/P/P). Hydroxypropyl chitosan (HCS) was modified with 3,4-dihydroxybenzaldehyde (DBA) via Schiff base reaction to produce adhesive catechol-modified hydroxypropyl chitosan (CHCS). The mechanical properties and self-healing ability of the hydrogel were enhanced by grafting phenylboronic acid (PBA) onto sodium alginate (SA) to form SA-PBA. The incorporation of polyvinyl alcohol (PVA) and polyvinylpyrrolidone (PVP) further improved the mechanical properties, water absorption, and moisture retention of the hydrogel. Silver ions were reduced to silver nanoparticles (AgNPs) by the reducing property of catechol and integrated into the hydrogel network, endowing it with antibacterial functionality. The C/S/A/P/P hydrogel exhibits excellent mechanical properties (tensile stress of 391.99 kPa and strain of 149.11%), photothermal properties, and antibacterial performance (inhibition rates of 95.1% against Escherichia coli and 64.3% against Staphylococcus aureus). This green preparation method offers a new approach for developing advanced wound dressings.
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PubMed
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FOOD SCIENCE AND BIOTECHNOLOGY
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2025
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IF 3.1
Tian Zhen,Jin Huaizhou,Shang Xiaoxiao,Ma Qifei,Wang Weihong,Jin Shangzhong
Natural biopolymer-stabilized Pickering emulsions are being explored as alternatives to surfactant-stabilized emulsions in food applications. This work explores the long-term stability degradation of oil-in-water (O/W) Pickering emulsions stabilized by whey protein isolate (WPI) and chitosan (CS), using optical tweezers to evaluate their potential for reduced-fat mayonnaise. The study found that for O/W emulsions prepared with a 50% water phase volume fraction, the maximum contact force of the droplets decreased from 69 to 37 pN, while the depletion force (DF) increased from 2.23 to 5.94 pN by Day 45. On Day 60, contact coalescence was observed. The application of this emulsion in mayonnaise preparation revealed that its mechanical stability and resistance to destabilization were superior to those of traditional mayonnaise. This study provides experimental references for a deeper understanding of emulsion stability mechanisms.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Feifang Zhang,Yangyi Wang,Ting Xu,Xiaoqiang Li,Helan Xu,Xiuliang Hou
Flexible chitosan/hydrolyzed wool keratin/graphene (Cs/HWK/Gr) composite film with multi-functionalities was prepared by the assistance dispersion effect of hydrolyzed wool keratin (HWK). With the growing emphasis on environmental protection, bio-based materials have garnered increasing attention. Wool keratin, a promising bio-based material, has recently been discovered to effectively disperse graphene (Gr) in aqueous solutions. In this study, we utilized HWK to achieve uniform dispersion of Gr. Subsequently, leveraging the film-forming properties of chitosan (Cs), Cs/HWK/Gr composite films was fabricated. When the mass ratio of HWK to Gr was 16:6, the Cs/HWK/Gr film exhibits uniformity, flexibility and conductive properties. Its electrical conductivity ranges from 1 to 27 S/m when the ambient humidity was below 33%. They can be employed as strain sensors to monitor the bending activities of wrists and fingers. Additionally, the thermal management performance of Cs/HWK/Gr composite film was evaluated. It indicated that the Cs/HWK/Gr composite film possesses very high absorptivity in the 250~2500 nm, showcasing a significant photothermal effect. The composite films also exhibited superior electrical heating properties, increasing temperature by 51.5℃ under 15 V DC voltage. Furthermore, the Cs/HWK/Gr composite films exhibited excellent antibacterial properties, with an inhibition rate of 99% for Escherichia coli and 98% for Staphylococcus aureus. This research provides a feasible method to prepare bio-based multifunctional film which has potential applications in the fields of sensing and clothing materials.
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Gels
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2025
·Vol. 11
·期 8
·646
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IF 5.3
Zhisong Qian,Xinpeng Li,Gege Yan,Xiaoyong Chen,Mohd Shaiful Sajab,Gongtao Ding,Wan Nazihah Liyana Wan Jusoh
The use of pharmaceuticals to treat human and animal diseases has resulted in the increase of antibiotic traces in the water system and soil, thus raising concerns about the environmental aspect. In this study, sodium alginate (SA) and carboxymethyl chitosan (CMCS) hydrogel microbeads were developed to enhance the adsorption of antibiotics by applying electrostatic spray in the fabrication of microbeads. Two hydrogel microbead sizes, SC-400 (~400 µm) and SC-2000 (~2000 µm), were used for the adsorption of tetracycline (TC) and ciprofloxacin (CIP) antibiotics in single and binary systems. The microbeads exhibited a good adsorption capacity and were able to achieve a maximum adsorption at pH 7 and 25 °C. Adsorption kinetics expressed suitability in the pseudo-second-order kinetic model for TC and CIP antibiotics. These results demonstrate that both single and binary systems align well with the Freundlich and Temkin isotherm models, indicating their suitability in explaining the adsorption mechanisms. These mechanisms predominantly involve electrostatic interactions between the SA/CMCS hydrogel microbeads and the antibiotics TC and CIP. This study highlights the capability of using SA/CMCS hydrogel microbeads for antibiotic removal and other environmental applications.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Huihui Zheng,Ye Xiao,Zhengyu Yang,Weihua Zhang,Yetao Tang,Rongliang Qiu
Electrochemical removal of hexavalent chromium, Cr(VI), from aqueous systems is a kinetically challenging process. In this study, the influence of sorptive electrode and alternating potential on the kinetics of Cr(VI) electrochemical removal was investigated using electrodes with different Cr(VI) adsorption performance. The phosphonium-modified chitosan (CS-P) electrode outperformed chitosan and carbon paper electrodes, achieving 36.4 % and 63.2 % higher removal efficiencies, respectively. Notably, the Cr(VI) removal efficiency of the CS-P electrode under alternating potential was 1.78 times that under direct potential. CS-P electrode operated under periodic anodic (+0 V vs. Ag/AgCl) and cathodic potentials (−1.0 V vs. Ag/AgCl) with durations of 0.5 s and 1 s, respectively, reduced 5–50 mg/L Cr(VI) at pH ∼ 3.0 to < 0.5 mg/L within 15–30 min. Cr(VI) was removed as Cr(III) with ∼60 % remaining in the solution and ∼40 % deposited on the electrode. The initial Cr(VI) removal kinetics was found to increase linearly (R 2 = 0.978) with the increase in the adsorbed amount of Cr(VI) on the electrode, which could be explained by an adsorption-electroreduction model. The results give insights into the key factors governing Cr(VI) electroreduction and provide a simple and effective way for the treatment of water contaminated by Cr(VI).
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International Journal of Polymeric Materials and Polymeric Biomaterials
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2025
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IF 2.6
Shengnan Zheng,Chuzhou Wen,Jiaxue Tang,Changkai Sun,Fengtao Wang,Shui Guan
Pyrroloquinoline quinone (PQQ) is a redox cofactor that has been shown to have strong antioxidant capacity and neuroprotective effects and has been extensively studied in recent years. However, PQQ small molecule compounds have poorly stability and low bioavailability in vivo, making it difficult to exert drug activity for long periods of time. In this study, we employed the EDC/NHS method to graft PQQ onto carboxymethyl chitosan (CMCS) to improve the utilization of PQQ. The obtained PQQ-g-CMCS product was a water-soluble copolymer, and the grafting rate could be controlled by adjusting the pH and the raw material feeding ratio. The PQQ-g-CMCS samples were characterized using FT-IR, UR-Vis, NMR, and XRD spectroscopy, suggesting a conjugation reaction between the amino groups of CMCS and the carboxyl groups of PQQ. Specifically, the in vitro antioxidant experiments showed that the Fe2+ chelating activity of the grafted copolymer was significantly enhanced. In addition, the PQQ-g-CMCS copolymer also exhibited good biocompatibility and significant protective effect against H2O2-induced oxidative damage in SH-SY5Y cells. These results preliminarily indicate that PQQ-g-CMCS may be a promising antioxidant material for applications such as drug release and tissue engineering.
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MOLECULES
·
2025
·Vol. 30
·期 16
·3390
·
IF 4.6
Qian Lv,Yiquan Zhang
In embedding systems, protein–polysaccharide complexes can be utilized as wall materials to improve the bioavailability and activity of bioactive substances during delivery. This study used the antisolvent precipitation method to manufacture gliadin from highland barley distillers’ grains (HBDGG)–chitosan (Cs) nanoparticles. Using a variety of characterization techniques, the microstructure and interaction mechanism of HBDGG-Cs nanoparticles were examined, and their stability was assessed. In comparison to HBDGG, the results indicated that the addition of Cs enhanced the intensity of UV absorption and reduced the intensity of fluorescence. The content of α-helix dropped, while β-sheet, β-turn, and irregularly coiled content rose in the complexes. Hydrogen bonding, hydrophobic interactions, and electrostatic interactions were the primary forces that formed the nanoparticles. The contact force between HBDGG and Cs enhanced the stability of the nanoparticles. The particle size, polydispersity index (PDI), and zeta potential were 526.10 ± 11.78 nm, 0.20 ± 0.06, and 51.31 ± 0.66 mV, respectively, at a mass ratio of 1:1 between HBDGG and Cs. The nanoparticles exhibited good ionic, acid-base, and storage stability in addition to being widely distributed. This work offers a theoretical foundation for employing HBDGG-Cs nanoparticles to deliver bioactive components in food as well as a novel method for the comprehensive usage of HBDGG and Cs.
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Food Packaging and Shelf Life
·
2025
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IF 10.6
Hui-Fang Du,Fei Cao,Zhi-Hong Xu,Ya-Xian Gao,Ya-Hui Zhang,Sen Pang,Wan Li,Long-Fei Li,Li Han,Li-Juan Wang,Hong-De An
Apple ring rot, caused by Botryosphaeria dothidea , is a major postharvest disease that reduces the shelf life and quality of apples. In this study, a biodegradable composite packaging film was developed by incorporating diaporthein B (DTB), a marine-derived antifungal compound, into a chitosan (CS) matrix reinforced with zinc oxide nanoparticles (ZnO). This strategy aimed to enhance the bioavailability and applicability of DTB for postharvest disease control. The resulting DTB/ZnO/CS film exhibited synergistic antifungal activity and significantly suppressed lesion expansion caused by B. dothidea on infected apples, with an inhibition rate of 65.5 % after 4 days of incubation. Moreover, it contributed to maintaining fruit quality by preserving physicochemical quality, delaying senescence, and mitigating oxidative stress during storage. Biodegradability assays confirmed the film’s rapid degradation in natural soil, highlighting its eco-friendly properties. Subacute toxicity evaluations indicated no adverse effects, supporting its biosafety for potential food-contact applications. Overall, the DTB/ZnO/CS film represents a sustainable and practical strategy for controlling apple ring rot and other postharvest fungal diseases, while contributing to food safety and sustainability.
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