Materials Today Communications
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2023
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IF 3.8
Yonghan Wei,Xiao Hu,Jun Shao,Shuangying Wang,Yusen Zhang,Wen-Zhong Xie,Yu-Xiang Wu,Xian-Tao Zeng,Ling-Ling Zhang
Pure titanium and its alloys are widely used in dental implants because of their excellent physical chemistry and biocompatibility properties, but their negligible antibacterial activity may lead to bacterial infection and implants failure. Inspired by the piezoelectricity and porous structure of living bone, a multiporous piezo-coating with barium titanate (BaTiO 3 , BTO) nanoparticles embedded in chitosan film is modified on acid-etched pure titanium. The surface of coating shows antibacterial effects and can be further improved under daily sonic toothbrush stimulation with an antibacterial rate of 90.41%. Interestingly, the planktonic bacteria around this coating also have low proliferation. The antibacterial mechanism may be BTO-mediated intracellular and extracellular reactive oxygen species (ROS). On the one hand, the contact potential difference (CPD) caused by the spontaneous polarization of BTO nanoparticles may destroy the intracellular electron transfer and lead to ROS burst. On the other hand, BTO could transfer mechanical energy to electrical energy under the stimulation of sonic toothbrushing (ST), then driving piezocatalytic effect to generate extracellular ROS. In addition, the piezo-coating also exhibits excellent biocompatibility to MC3T3-E1 cells, and promotes more hydroxyapatite deposition and plasma albumin adhesion. In summary, during the stimulation of daily sonic toothbrush, the bioinspired piezo-coating can effectively inhibit the formation of bacterial biofilm, which is a promising strategy to prevent dental implants infection in daily life.
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高影响因子
POSTHARVEST BIOLOGY AND TECHNOLOGY
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2023
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IF 7
Lingling Zhang,Ying Yang,Yongxing Zhu,Haijun Hu,Qie Jia,Chong Sun,Xuedong Zhu,Yiqing Liu
Postharvest rot caused by Fusarium solani ( F . solani ) results in enormous economic loss to the global vegetables industry. Chitosan has been shown to be effective in control postharvest diseases of vegetables, but the specific mechanism of chitosan on F . solani has not been studied. In this study, we evaluated antifungal activity of chitosan against F . solani caused soft rot in vitro and in vivo. Antifungal assay results showed that chitosan significantly inhibited the mycelial growth and spore germination of F . solani . Simultaneously, chitosan showed disruptive activity on the mycelial morphology and cell membrane, which were achieved by decreasing intracellular sugars, proteins and lipids content. Furthermore, chitosan treatment significantly decreased tricarboxylic acid (TCA)-related enzymes activity , reducing the number of metabolites in the TCA cycle . UPLC-Triple-TOF/MS-based metabolomics analysis showed that chitosan interferes with fungal metabolic pathways, mainly related to energy metabolism, lipid metabolism and sugar metabolism. Exogenous α-D-glucose and linoleic acid treatment promoted mycelia growth, verifying the sugar catabolism and TCA cycle was involved in the inhibition of chitosan against F . solani . The in vivo study showed that chitosan treatment effectively reduced disease rate and severity of postharvest soft rot through activating the biochemical defense response and modulating the expression of phytopathogenic responses LysM genes. These results contribute to explore the underlying mechanisms of chitosan against F . solani .
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Xiangjian Fan,Ying Ou,Huiyu Yang,Haiyang Yang,Ting Qu,Quanyuan Zhang,Fan Cheng,Fuqiang Hu,Hai Liu,Zushun Xu,Chunli Gong
Currently, achieving a simultaneous improvement in proton conductivity and mechanical properties is a key challenge in using chitosan (CS) as a proton exchange membrane (PEM) substrate in direct methanol fuel cells (DMFCs). Herein, a novel nanofiller–zwitterionic molecule, (3-(3-aminopropyl) dimethylammonio) propane-1-sulfonate, ADPS)-modified polydopamine (PDA) (PDA-ADPS) was synthesized by the Michael addition reaction and was incorporated into a CS matrix to prepare CS/PDA-ADPS composite membranes. PDA-ADPS, which contains an acid–based ion pair can create new proton conduction channels in the composite membrane, improving proton conductivity. The proton conductivity of the CS/PDA-ADPS composite membrane was as high as 38.4 mS cm −1 at 80 °C. Moreover, due to the excellent compatibility and dispersibility of PDA-ADPS in the CS matrix, the obtained CS/PDA-ADPS composite membranes exhibited favorable mechanical properties. Such outstanding proton conductivity and mechanical properties guarantee good performance of the composite membranes in fuel cells. The peak power density of the CS/PDA-ADPS composite membranes was 30.2 mW cm −2 at 70 °C. This work provides a new strategy for fabricating high-performance CS based PEMs for DMFCs.
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PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Xiangyu Sun,Yan Yang,Jiaming Yu,Qifeng Wei,Xiulian Ren
Bacterial infection of wounds remains one of the major clinical challenges, calling for the urgent development of novel multifunctional biological dressings. In this study, we developed a chitosan-based supramolecular aerogel NADES/PVA/CS, constructed by hydrogen bonding between chitosan, a natural deep eutectic solvents and polyvinyl alcohol, as a novel wound dressing against bacterial infections. The effect of polyvinyl alcohol content and its incorporation within chitosan-based supramolecular aerogels were investigated. The results of antibacterial test and MTT assay showed that it has obvious inhibitory effect on Staphylococcus aureus and Escherichia coli , showing excellent biocompatibility and effectively promotes wound healing. The microstructure of chitosan-based supramolecular aerogel showed that by adjusting the addition amount of polyvinyl alcohol, it could exhibit a perfect skeleton-type 3D network structure, which also made it possess smaller density and larger porosity and exhibit excellent water absorption property, contributing to the wetting of wound surface. More importantly, chitosan-based supramolecular aerogel is an environment-friendly biomaterial, which has been verified by degradability experiment. In a word, these unique advantages provide a broad prospect for the medical application of chitosan-based supramolecular aerogel NADES/PVA/CS, and provide a new strategy for the construction of green polysaccharide medical materials.
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SCIENCE OF THE TOTAL ENVIRONMENT
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2023
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IF 9.8
Haoxin Niu,Zetao Xiao,Ping Zhang,Wenwen Guo,Yuan Hu,Xin Wang
Leakage of hazardous chemicals often causes significant casualties, enormous economic losses, and negative social benefits. Presently, fire rescue personnel lack efficient and eco-friendly disposal materials for hazardous chemical leakage accidents. In this study, chitosan (CS) aerogels with excellent flame-retardant performance were prepared via cross-linking by two phosphorus-containing vanillin-based compounds (DV and TV). The as-prepared chitosan aerogels were lightweight and porous. The introduction of DV and TV greatly enhanced the residual char yields of CS at 700 °C and the flame-retardant performance of chitosan aerogels. TCS-5.0 possessed the best flame-retardant performance, indicating that TV was more effective than DV in enhancing the flame-retardant performance of chitosan aerogels. The greatly improved flame-retardant properties could be attributed to TV effectively promoting the residual char formation of chitosan aerogels and reducing the formation of combustible gas phase products. To improve the hydrophobicity of chitosan aerogels, TCS-5.0 was treated with solution immersion to load siloxane molecules on its surface. The water contact angle of HTCS-5.0 was 136.1°. HTCS-5.0 had a high oil absorption multiplicity, absorbing up to 31 times its own weight of chloroform. HTCS-5.0 could continuously absorb organic solvents on the water surface with the assistance of a vacuum pump, indicating that HTCS-5.0 could be used for the clean-up of hazardous chemical leakage accidents.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Jin Yan,Sichen He,Lingli Chen,Hui Chen,Wenjun Wang
In this study, gelatin-chitosan (GEL-CS) composite films added with 0.1 %, 0.2 %, and 0.3 % Cyclocarya paliurus flavonoids (CPF) were prepared. Then their appearance properties, mechanical properties, barrier properties, microstructure, thermal stability properties, antioxidant activity , and antibacterial properties were investigated. As compared with GEL-CS film, the GEL-CS films with CPF were darker in color, had higher water vapor barrier, higher elongation at break, and higher thermal stability. Additionally, microstructure analysis with Fourier infrared spectroscopy, scanning electron microscopy, and X-ray diffraction demonstrated that hydrogen bonding was the main force for cross-linking CPF with other membrane substrates. Moreover, the addition of CPF strengthened the antioxidant and antimicrobial properties of the membranes. These results indicated that the CPF addition could endow membranes with more excellent functional properties and bioactivity, accompanied by environmentally friendly and edible features. The GEL-CS-CPF composite film would be a potential and prospective packing material for food preservation applications.
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2023
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IF 6
Feifei Lu,Guanjun Ding,Xiaoyu Ma,Biao Huang,Lijun You
Magnetic chitosan (CS) cross-linked gelatin (Gel) polymer composites (MCGC) were fabricated by reacting CS with Gel in the present of carboxyl modified Fe 3 O 4 nanoparticles and cetyltrimethylammonium bromide using glutaraldehyde as a crosslinking agent. MCGC possessed high zeta potential, abundant active functional groups including amino and hydroxyl groups and facile magnetic separation properties. The prepared MCGC exhibited excellent adsorption performance for AR 18 and the adsorption capacity reached as high as 344.63 mg/g. The adsorption kinetics was fitted well with the pseudo-second order model, while the adsorption isotherms followed the Redlich-Peterson equation best. The thermodynamic studies indicated the adsorption process was exothermic and spontaneous. The adsorption mechanism was studied including electrostatic interaction, hydrogen-bond interaction and π-π stacking between dyes and MCGC. Desorption and renewable experiments proved MCGC possessed high regeneration properties and reusability as an adsorbent.
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高影响因子
CARBOHYDRATE POLYMERS
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2023
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IF 11.2
Tianyi Zhou,Haiyan Zhou,Fei Wang,Peng Zhang,Jian Shang,Leilei Shi
The intricate, hostile, and diverse nature of osteomyelitis (OM) poses a challenge for complete bacterial eradication and osteogenesis promotion via conventional treatment. Recently, functional hydrogels exhibiting antibacterial and osteogenic properties emerge as a promising avenue for OM wound healing in clinical practice. However, the preparation procedures and associated costs on cytokine and cell therapies for certain functional hydrogels can be complex and prohibitively expensive. In our research, a hybrid hydrogel dressing has been formulated utilizing carboxymethyl chitosan (CMCS) as the base material, and designed with inherent antibacterial, adhesion, proliferation, and differentiation characteristics, showing promise as a candidate for eradicating infection and promoting bone regeneration . The hybrid hydrogel is composed of interconnected networks of Fe 3+ -induced self-assembled CMCS and the antibacterial drug ciprofloxacin (CIP), resulting in excellent injectability and moldability. Notably, the CMCS/Fe 3+ /CIP hybrid hydrogel is capable of regulating antibacterial responses and stimulating osteogenesis in infected microenvironments without additional additives. This injectable antibacterial and osteogenic-promoting hydrogel establish a high-potential platform for low-cost, safe and effective treatment of OM by expediting the initial stages of infected bone wound repair.
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CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Weisen Yang,Yifei Liu,Yaqin Zhu,Wenlong Jiang,Fengshuo Shi,Jiapeng Hu,Shaohua Jiang,Shaoju Jian
Aquatic ecosystem contaminated by organic dyes is one of the most crucial issues plaguing people worldwide, while water remediation through adsorption technology is the most sustainable option. Herein, two chitosan-based adsorbents were successfully fabricated by a facile one-step method under alkaline condition via electrospraying technology, then the above two materials were cross-linked with epichlorohydrin and grafted triethylenetetramine to prepare two kinds magnetic Fe 3 O 4 /CS-ET-1 and Fe 3 O 4 /CS-ET-2 microspheres for remediation of anion dyes namely Congo red (CR) in wastewater respectively. The morphology features, structure, composition, thermal stability, and pore diameter of the two adsorbents were acquired by SEM coupled with EDX, XRD, FTIR, TGA, and BET. The adsorption behavior of Fe 3 O 4 /CS-ET-1 and Fe 3 O 4 /CS-ET-2 microspheres towards CR from water was systematically evaluated. The determined isoelectric points (pHpzc) of Fe 3 O 4 /CS-ET-1 and Fe 3 O 4 /CS-ET-2 are orderly 7.4 and 7.8. The results confirmed that the CR remediation process can be simulated by PSO kinetic model ( R 2 > 0.995) along with Langmuir isotherm ( R 2 > 0.998) with maximal CR adsorption amounts by Fe 3 O 4 /CS-ET-1 and Fe 3 O 4 /CS-ET-2 microspheres of 1145.42 and 617.28 mg g −1 at pH = 7 and T = 25 °C, respectively. The negative Δ G 0 , positive Δ H 0 (28.65 and 8.02 kJ mol −1 ), and positive Δ S 0 (112.29 and 62.71 J mol −1 K −1 ) signified that the adsorption of CR onto Fe 3 O 4 /CS-ET-1 and Fe 3 O 4 /CS-ET-2 microspheres surface was spontaneous and endothermic in nature. After four consecutive cycles, both magnetic microspheres remained a superior CR removal performance, indicative of the stability and recyclability of the adsorbents.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Qing Yin,Jiali Liu,Zicheng Zhong,Yueyuan Zhang,Feiran Zhang,Mingming Wang
In this study, chitosan (CS) and phytic acid (PA) were employed as raw materials to synthesize a range of chitosan–phytic acid complexes (CP) with different ratios (CS:PA = 12:1, 9:1, 6:1, 3:1, 1:1). The structures and elemental compositions of the compounds were characterized using Fourier-Transform Infrared Spectroscopy (FT-IR) and Scanning Electron Microscopy with Energy-Dispersive X-ray Spectroscopy (SEM-EDS). The thermal stability of the synthesized materials was analyzed using a Thermogravimetric Analyzer (TG). Electrochemical testing was conducted to explore the corrosion inhibition effect of the modified inhibitors with varying ratios on Q235 steel in 3.5 wt% NaCl solution. Additionally, Scanning Electron Microscopy (SEM) was utilized to investigate the surface morphology of the immersed samples. When the CS:PA ratio was 3:1, CP exhibited an impressive corrosion inhibition efficiency of 94.9 %. Furthermore, the antimicrobial properties of CP were evaluated using the colony plate counting method. At a CS:PA ratio of 1:1, CP demonstrated the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) at 0.1250 % and 0.5000 %, respectively. This research introduces a novel green corrosion inhibitor capable of simultaneously reducing the electrochemical corrosion of Q235 while inhibiting biocorrosion, avoiding the antagonistic effects arising from the simultaneous use of biocides and corrosion inhibitors in the system.
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ELECTROCHIMICA ACTA
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2023
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IF 6.6
Chunxia Yan,Jie Guan,Zhimao Li,Fangyue Cheng,Ziqiang Shao
Due to the growing demand for clean and renewable energy, the effective utilization of renewable resources in energy storage and has been concerned. And high specific capacitance and stable electrochemistry for energy storage devices are challenging to develop. Learning from unique structure of goniastrea coral, we design to construct three-dimensional layered conductive electrodes material made of MoS 2 @chitosan carbon spheres (MNCCS) composite. The NiCoLDH nanosheets construct on the surface of conductive chitosan carbon spheres to effectively form open permeable channels and rich conductive networks, improves the efficient energy storage and electrochemical stability. MoS 2 is strongly coupled with NiCoLDH nanosheets through heterointerface, which resembles tentacles on the surface of coral, exposing more active sites to efficiently trap ions. Besides, the obtained material possesses favorable heterojunction interface and defects, which provide sufficient available electroactive sites and numerous storage charge area. Hence, The MNCCS presents an outstanding specific capacitance of 2605.9 F g −1 at 1 A g −1 . Notably, a supercapacitor fitted with MNCCS electrode and CCS electrode achieves high specific capacitance (234.4 F g −1 at 1 A g −1 ), the maximum energy density of 77.0W h kg −1 at highest power density of 667.4W kg −1 , along with the excellent cycling stability of 90.8% retention over 10,000 cycles. This work provides a new perspective for fabricating high-performance and stable supercapacitors electrode material for clean energy storage.
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APPLIED SURFACE SCIENCE
·
2023
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IF 6.7
Yuhui Zhang,Fei Liu,Li Zhong,Zhaoji Dong,Chuchu Chen,Zhaoyang Xu
Tetracycline antibiotics are currently detected in most water sources. The presence of such pollutants in the environment is becoming increasingly common, and addressing this contamination is a significant challenge due to its potential threat to human health and ecosystem stability. This study successfully prepared cellulose nanofiber/titanium dioxide/chitosan (CNF/TiO 2 /CS) aerogels by directional freeze-drying technique for photocatalytic degradation of tetracycline-contaminated wastewater. The CNF/TiO 2 /CS aerogel photocatalysts have a three-dimensional mesh structure with a large specific surface area, which provides many active sites for the highly efficient photocatalytic degradation of tetracyclines. The CNF/TiO 2 /CS aerogel showed 99.5% tetracycline removal efficiency within 180 min. Free radical scavenging experiments investigated the adsorption and photodegradation mechanism of tetracycline by CNF/TiO 2 /CS aerogel. The critical participation of •O 2 - and h + in the decomposition of tetracycline was verified, which provided experimental support for the photocatalytic reaction mechanism. In addition, the CNF/TiO 2 /CS aerogel has high stability and recyclability for photocatalytic degradation, which can be recycled 7 times, and the recycling process is environmentally friendly. An in-depth analysis of the intermediate degradation products using liquid chromatography-mass spectrometry (LC-MS) revealed two efficient photocatalytic degradation pathways. These findings strongly confirm the extensive potential of photocatalytically active aerogels for wastewater treatment.
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危险品化学品经营许可证（带存储）