Advanced Sensor Research
·
2023
·Vol. 2
·期 6
·2200086
·
IF 0
Si Wang,Bohao Liu,Xingdong Feng,Rui Pan,Yuanlingyun Cai,Renyan Zhang,Mingbo Pu,Xiaoliang Ma,Xiong Li,Huiling Tai,Xiangang Luo
High flexibility, porosity, and antibacterial activity are extremely desired for wearable health monitoring, which is beneficial to simultaneously promote wearing comfort and safety. In this study, an antibacterial nanofibers-based triboelectric generator (AN-TENG) composed of the flexible chitosan/polyvinylpyrrolidone modified with halloysite nanotubes (CTS/PVP/HNTs) nanofibers and cube-arrays structured Ecoflex film is proposed for simultaneously energy harvesting and self-powered human motion monitoring. The open-circuit voltage (280 V), short-circuit current (3.98 μA), and transferred charge (51 nC) of the CTS/PVP/HNTs nanofibers TENG at the optimal compound concentration are increased by 90.8%, 86.92%, and 96.2%, respectively, compared to the CTS/PVP nanofibers one (size: 3 cm × 3 cm, mechanical force: 10 N @1 Hz), revealing good real-time monitoring ability for human wrist, elbow, and finger motion. An antibacterial test is carried out to evaluate the antibacterial activity and the antibacterial rate of the nanofibers against Escherichia coli (ATCC 8739) and Staphylococcus aureus (ATCC 6538) based on the current national standard GB/T 31402–2015, indicating good antibacterial properties of the nanofibers. This research offers an ingenious strategy to establish an antibacterial nanofibers-based TENG for self-powered motion monitoring and energy harvesting and offers a new insight to improve the practical security of wearable electronic devices.
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DOI
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Zehao Jin,Lili Wang,Kaiyuan Zheng,Qiyue Gao,Wei Feng,Shoukang Hu,Ming Yue,Xiaobiao Shan
The triboelectric nanogenerator (TENG) of natural biomaterials is a new type of energy harvesting device and can be used as a self-powered sensor, which has received extensive research and attention. In this paper, based on the biocompatibility of chitosan and chondroitin sulfate, ZnO-modified chitosan/chondroitin sulfate/ZnO TENG was prepared for research on wearable devices and sustainable power supply devices. This study employs molecular dynamics to compute the interaction energy between chitosan and ZnO molecules. Theoretical calculations have unequivocally substantiated the occurrence of a binding interaction between these two molecular entities. The effect of ZnO on chitosan/chondroitin sulfate morphology was investigated by atomic force microscopy . The chitosan/chondroitin sulfate/ZnO TENG has high flexibility and electrical output performance. It can reach 105 V and 3.3 µA of open-circuit voltage and short-circuit current. Chitosan/chondroitin Sulfate/ZnO TENG successfully converts the mechanical energy of human motion into electrical energy. Strong electrical signals are exhibited when making fists and waving fingers and wrists. The TENG is a self-powered source and lights up 70 blue light-emitting diodes (LEDs). The chitosan/chondroitin sulfate/ZnO TENG has demonstrated its capabilities in energy harvesting and wearable self-powered sensors.
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高影响因子
CARBOHYDRATE POLYMERS
·
2010
·
IF 3.167
Yanni Zhang,Ying Yang,Tianying Guo
In this work chitosan microspheres have been prepared by ion precipitation using sodium sulfate as precipitant, and crosslinked with natural crosslinker genipin . Then the microspheres were hydrophobically modified by covalent and ion interaction grafting of stearic acid and sodium stearate respectively. Results indicated that the there were still some amount of –NH 2 groups on the genipin-crosslinked chitosan microspheres. And the contact angles for hydrophobical graft microspheres were increased greatly from 27° to 104°, which indicates stearic chains have been grafted on the surface of the microspheres even only by a simple graft process based on ion interaction. The interactions of protein with the hydrophobically modified chitosan microspheres were investigated by surface absorption method using bovine serum albumin as a model protein. And results indicated that adsorption efficiency for bovine serum albumin of the fatty chain grafted chitosan microspheres was higher than that of the prestine one distinctly, due to the additional hydrophobic interaction. And the adsorbed protein could well-off be desorbed under a general condition.
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DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2021
·
IF 9.381
Meiling Zhang,Shuai Jiang,Fuyi Han,Mengmeng Li,Ni Wang,Lifang Liu
Attributed to low cost, renewable, and high availability, cellulose-based aerogels are desirable materials for various applications. However, mechanical robustness and functionalization remain huge challenges. Herein, we synthesized a recoverable, anisotropic cellulose nanofiber (CNF) / chitosan (CS) aerogel via directional freeze casting and chemical cross-link process. The chitosan was performed as strength polymers to prohibits the shrinkage and retains the structural stability of 3D cellulose nanofiber skeleton, endowing the composite aerogel with satisfactory deformation recovery ability (without loss under 60 % stress cycled 100 times). The CNF/CS composite aerogel has ultralow density (∼8.4 mg/cm 3 ), high temperature-invariant (above 300 °C) and high porosity (98 %). The CNF/CS aerogel demonstrates anisotropic thermal insulation properties with low thermal conductivity (28 mWm −1 K −1 in rational direction and 36 mW m −1 K −1 in the axial direction). Moreover, the composite aerogel (water contact angle ∼148°) exhibited outstanding oil/water selectivity and high absorption capacity (82–253 g/g) for various oils and organic solvents. Therefore, the multifunctional CNF/CS composite aerogels are potential materials for thermal management and oil absorption applications.
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高影响因子
JOM
·
2023
·Vol. 75
·期 3
·701-707
·
IF 2.6
Yao Qiang,Guo Jing,Guan Fucheng,Zhao Miao,Zhang Sen,Tuo Xiaohang,Yang Qiang
As a transition metal dichalcogenides (TMDCs), molybdenum disulfide (MoS 2 ) comprises individual sheets stacked into a bulk-phase structure. Compared with bulk-phase MoS 2 , the few-layer MoS 2 presents a two-dimensional nanostructure similar to graphene, which has the advantages of large specific surface area and many unsaturated vacancies in the edge layer and has broad application prospects in the fields of photoelectricity and catalysis. Here, a simple and practical method of exfoliating bulk-phase MoS 2 is proposed. The bulk-phase MoS 2 was sonicated using chitosan/acetic acid (CS/HAc) solution to obtain oligomeric MoS 2 . The raw materials used in this method have good biocompatibility, the preparation process and operation are simple, and the pollution caused to the environment is small, which meets the green chemical standard. The method provides a new idea and way for the peeling treatment of other laminated materials. The results show that the stacking of (002) crystal plane of MoS 2 samples after treatment with CS/HAc solution is reduced and the crystalline phase is changed from polycrystalline to single-crystal structure, which has great potential for applications in optical and electrical fields.
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高影响因子
JOURNAL OF POROUS MATERIALS
·
2024
·Vol. 31
·期 2
·673-684
·
IF 2.5
Zhao Dongliang,Zhou Peng,Li Xiangzhou,Song Ke
Mesoporous carbon has become a research hot spot due to its excellent properties and broad application prospects. In this study, mesoporous carbon was synthesized simply by carbonizing a composite of chitosan (CS) and nano-barium carbonate, taking advantage of the excellent flocculability of CS. The structure and morphology of chitosan-based mesoporous carbon (CSMC) were characterized using BET, SEM, FT-IR, XRD, XPS and Raman techniques. The results revealed that CSMC possessed a graphitic and diamond-like structure consisting of C (92.8%), O (6.9%) and N (0.3%). The mass ratio of BaCO 3 /CS played an important role in pore formation, with CSMC5 exhibiting a specific surface area and mesoporous surface area up to 2211 and 1119 m 2 /g, respectively. The adsorption performance of CSMC was tested with chlorogenic acid (CA) as the adsorption object. The saturated adsorption capacity of CSMC for CA was up to 742.52 mg/g and the adsorption rate was rapid. The adsorption behavior of CA by CSMC conformed to Langmuir isothermal adsorption model and pseudo-second-order kinetic model. Thermodynamic parameters indicated that the adsorption of CA by CSMC was exothermic and reversible. This study provides a promising approach for the synthesis of chitosan-based mesoporous carbon materials and potential applications in sustainable technologies.
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高影响因子
RSC Advances
·
2017
·Vol. 7
·期 28
·17005-17019
·
IF 3.108
Shifeng Yan,Taotao Wang,Xing Li,Yuhang Jian,Kunxi Zhang,Guifei Li,Jingbo Yin
Injectable hydrogels as an important biomaterial class have been widely used in regenerative medicine. A series of injectable poly(L-glutamic acid)/chitosan (PLGA/CS) hydrogels were fabricated by self-crosslinking aldehyde-modified PLGA (PLGA–CHO) and lactic acid-modified chitosan (CS–LA). The oxidation degree of PLGA–CHO and degree of substitution (DS) of CS–LA could be adjusted by the amount of sodium periodate and lactic acid, respectively. The effect of the solid content of the hydrogels, oxidation degree of PLGA–CHO and CS–LA/PLGA–CHO mass ratio on the gelation time, gel content, water uptake, mechanical properties, microscopic morphology, and in vitro degradation of the hydrogels was examined. The pH and ion sensitivity of PLGA/CS hydrogels was also examined. Encapsulation of rabbit chondrocytes within the hydrogels showed viability of the entrapped cells and cytocompatibility of the injectable hydrogels. The injectable PLGA/CS hydrogels demonstrated attractive properties for future application in pharmaceutical delivery and tissue engineering.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2019
·
IF 4.784
Zuolong Yu,Guiwei Rao,Yunxiao Wei,Jie Yu,Sihong Wu,Yupei Fang
Of late, the demand for food-packaging materials, in particular, multifunction packaging materials that are biodegradable; antibacterial; have good mechanical and barrier properties; and are edible and transparent, has increased considerably. In this study, we prepared chitosan (CS)/ε-polylysine (PL) biofilms with different CS-to-PL ratios. We studied the preparation, mechanical properties, microstructures, thermal stability, transparency, water-vapor permeability, oil permeability, and antibacterial properties of the composite CS/PL biofilms. The results demonstrate that CS/PL biofilms are mechanically strong, have good thermal stability, high transparency, low water-vapor and oil permeability, and extensive antibacterial properties that act against Escherichia coli , Bacillus subtilis , and yeast. Therefore, we therefore conclude that CS/PL biofilms are promising food-packaging materials.
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高影响因子
Foods
·
2025
·Vol. 14
·期 9
·1563
·
IF 5.1
Xiumei Wang,Yibin Chen,Xiaoxu Zhao,Jie Pang
The effects of stearic acid (SA) and lauric acid (LA) with different concentrations on the structure and physicochemical properties of konjac glucomannan (KGM)/chitosan (CTS)/Zein (KCZ) film were systematically investigated in this paper. The rheology results suggested that the apparent viscosity of the KCZ film solution was significantly enhanced after adding fatty acids (FAs), and all the film-forming solutions were typical non-Newtonian pseudoplastic fluids. Hydrogen bond interactions were formed among KGM, CTS, Zein, and FA molecules. KCZ-FA films had higher crystallinities than KCZ film, and their crystallinities increased with the increase in FA concentrations. Microstructure indicated that adding FAs significantly affected the surface morphologies and roughness of KCZ film. KCZ-LA films exhibited much rougher surfaces than KCZ-SA films when FA concentrations were the same. Moreover, the incorporation of FAs significantly (p< 0.05) decreased the transmittance of KCZ film. KCZ-FA films exhibited higher hydrophobicities and water vapor barrier properties than KCZ film due to their significantly (p< 0.05) higher water contact angle, lower water solubility, water content, and vapor permeability values. The thermal stabilities, color attributes, and mechanical properties of KCZ film were also improved after adding appropriate concentrations of FA. Therefore, KCZ-FA films with excellent performances are promising food packaging materials in the future.
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产品关联
DOI
PubMed
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Jinyu Shan,Jie Zhang,Xinru Wang,Kaili Yang,Dong Yang,Guangming Tian,Yunzhi Dang,Jianhua Ma
Inhibiting bacterial growth on wound surfaces is crucial for accelerating wound healing. Although antibiotics are commonly used to address the antibacterial needs of inflammatory wounds, their use can lead to bacterial resistance. To avoid the prolonged use of antibiotics while meeting the antibacterial requirements during the wound healing process, the combination of natural antibacterial materials with inorganic antibacterial agents to create efficient antimicrobial medical composites has shown promising potential. In this work, we first prepared a spinning solution by combining zinc oxide (ZnO) with chitosan (CS). Using a wet spinning process, CS/ZnO fibers were fabricated. Subsequently, a layer of zinc alginate (Alg-Zn) was coated on the surface of the CS/ZnO fibers through an in situ impregnation technique, resulting in the formation of composite fibers with high-efficiency and sustained antibacterial properties. Due to the inherent cationic antibacterial activity of CS and the zinc ion release from both Alg-Zn and ZnO, the composite fibers exhibited excellent antibacterial performance. The maximum inhibition zones against Escherichia coli, Staphylococcus aureus, and Pseudomonas aeruginosa were 6.7, 4.3, and 2.5 mm, respectively. Benefiting from the Schiff base reaction between CS and Alg-Zn, the composite fibers maintained good mechanical properties, with a tensile strength of 170 ± 2 MPa. Additionally, the composite fibers demonstrated favorable biocompatibility, moisture absorption, and breathability. This work provides valuable data for the design and preparation of antibacterial functional fibers and offers an approach for the development of high-efficiency antibacterial medical composites.
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产品关联
DOI
高影响因子
CELLULOSE
·
2025
·
IF 4.8
Bai Xiaoyu,Wan Mengyu,Fan Wuhou,Kang Jianping,Xia Zhaoxia,Li Jiangtao,Lan Jingying,Xiao Lan,Zuo Song,Jiang Yuanzhang,Tan Lin,Zhang Yong
Electrostatic spinning technology can prepare nanofiber materials with high specific surface area and unique microstructure. Cellulose acetate (CA) has excellent membrane formation and processability, while chitosan (CS) is positively charged due to the abundance of amino groups and has certain biological activities. In this paper, CA/CS nanofiber membranes with different CS contents were prepared by solution blending and electrostatic spinning techniques and used in hemoperfusion (HP) for targeted removal of endotoxins. The CA/CS nanofibrous membranes were systematically characterized using infrared spectroscopy, scanning electron microscopy, etc., and the clearance ability of CA/CS nanofibrous membranes for endotoxin was tested under static and dynamic simulated HP conditions. The results showed that the addition of CS changed the structure of CA nanofibers, significantly increased the specific surface area of CA/CS nanofiber membrane, and provided more adsorption sites for the membrane material. The positive charge of CS interacted with the negatively charged endotoxin in the blood through electrostatic attraction, which enabled the CA/CS nanofiber membranes to adsorb endotoxin efficiently and exhibit higher endotoxin clearance ability. In the static adsorption experiment, when the CS content was 3.75%, the endotoxin adsorption and clearance rate could reach 580.0 ± 32.2 EU/g and 65.1 ± 3.6%, respectively. In the dynamic adsorption experiment, when the CS content was 2.50%, the CA/CS nanofiber membrane had a good effect on the adsorption of endotoxin. Meanwhile, CA/CS nanofiber membrane also has good blood compatibility. Therefore, the CA/CS nanofiber membrane is potentially valuable in blood purification.
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产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2025
·
IF 5.7
Zhiwen Hu,Fangjiu He,Anxiong Liu,Xuan Zhao,Shuangquan Wu,Jian You,Qifa Ye,Xiaowen Shi,Zibiao Zhong,Ruilong Shao
Liver failure, marked by a rapid or progressive decline in liver function, leads to complications such as hyperbilirubinemia and infections, contributing to approximately 2 million global deaths each year. Current hemoperfusion methods for hyperbilirubinemia treatment are limited by their low adsorption selectivity and inadequate biosafety, necessitating better treatments. In this study, a chitosan-based HKUST-1 aerogel (HC) was developed as a highly selective, biosafe, and antibacterial adsorbent. The integration of HKUST-1 with chitosan formed an aerogel that achieved high bilirubin adsorption in vitro along with significant biosafety, anticoagulant properties, and antibacterial activity against Staphylococcus aureus and Escherichia coli. In an animal model of hyperbilirubinemia, the HC aerogel demonstrated 53.8% bilirubin clearance from the whole blood. These findings suggest that the HKUST-1/chitosan aerogel is a promising candidate for liver failure treatment, effectively combining bilirubin adsorption with infection control in complex blood environments.
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PubMed
高影响因子
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