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.
研究领域:
材料科学
·
环境科学
·
化学工程
·
纳米技术
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DOI
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.
研究领域:
纳米技术
·
材料科学
·
化学
·
应用物理学
·
环境科学
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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.
研究领域:
材料科学
·
纳米技术
·
高分子科学
·
热工学
·
环境工程
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DOI
高影响因子
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.
研究领域:
生物医学工程
·
材料科学
·
电子器件
·
可穿戴设备
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DOI
CARBOHYDRATE POLYMERS
·
2016
·
IF 4.219
Chao Liu,Huiyan Zhang,Rui Xiao,Shubin Wu
Thermogravimetric characteristics of chitin and chitosan and their potentials to produce value-added organonitrogen chemicals were separately evaluated via TG/DSC-FTIR and Py-GC/MS. Results shown that chitin had the better thermal stability and higher activation energy than chitosan because of the abundant acetamido group. Furthermore, the dominated volatilization in active pyrolysis of chitin contributed to its endothermic property, whereas the charring in chitosan led to the exothermal. During fast pyrolysis, the acetamido group in chitin and chitosan was converted into acetic acid or acetamide. Typical products from chitosan pyrolysis were aza-heterocyclic chemicals, i.e. pyridines, pyrazines, and pyrroles, with the total selectivity of 50.50% at 600 °C. Herein, selectivity of pyrazine compounds was up to 22.99%. These aza-heterocyclic chemicals came from the nucleophilic addition reaction of primary amine and carbonyl. However, main reaction during chitin pyrolysis was ring-opening degradation, which led to the formation of acetamido chemicals, especially acetamido acetaldehyde with the highest selectivity of 27.27% at 450 °C. In summary, chitosan had the potential to produce aza-heterocyclic chemicals, and chitin to acetamido chemicals.
研究领域:
生物化学
·
材料科学
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DOI
高影响因子
ULTRASONICS SONOCHEMISTRY
·
2016
·
IF 4.556
Jingfu Jia,Yanzhe Gai,Wucong Wang,Yaping Zhao
Ultrasound-induced synthesis of chitosan-modified nano-scale graphene oxide (CS-NGO) hybrid nanosheets, which has great potential pharmaceutical applications, in supercritical CO 2 without catalyst was presented for the first time. The preparation process does not require organic solvent and post-processing, and CO 2 easily escapes from the product. The morphology and structure of the CS-NGO, characterized using scanning electron microscopy, transmission electron microscopy, infrared spectroscopy, X-ray photoelectron spectroscopy and thermogravimetric analysis, confirms that it was combined via the amide linkage, and had excellent dispersibility and stability toward acidic and physiological aqueous solution, which implies that it could be used as a drug-carrier. The sonication power played a crucial role in inducing forming amidation, and the conversion rate increased with the sonication time. The mechanism of this reaction was explained.
研究领域:
材料科学
·
药学
·
纳米技术
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DOI
高影响因子
Pharmaceutics
·
2026
·Vol. 18
·期 1
·
IF 5.5
Lizhen Yu,Fengge Wang,Shuyun Bao,Yue Zhang,Xuebin Shen,Desheng Wang,Zhisheng Liu,Xinyi Liu,Lihua Li,Renmin Gong
Background: Oral insulin improves compliance and convenience in patients with diabetes who require regular needle injections. However, the clinical application of oral insulin preparations has been limited due to instability and inefficient permeation through the gastrointestinal tract. In this study, a novel cationic polysaccharide nanodrug delivery platform was designed for efficient oral insulin delivery.Methods: The innovative thiolated trimethyl chitosan-grafted β-cyclodextrin (NCT) was synthesized by utilizing N-trimethyl chitosan (TMC) as the polymer backbone. This involved modifying TMC with thiol group-containing N-acetylcysteine and carboxymethyl-β-cyclodextrin that possesses hydrophobic cavities via an amide condensation reaction. Subsequently, this polymer was employed to construct the NCT nanoparticle system using an ionic cross-linking method. The physicochemical properties of the NCT nanoparticles were systematically analyzed, and their therapeutic efficacy was comprehensively evaluated in streptozotocin (STZ)-induced animal models.Results: The NCT nanoparticles demonstrated mucus adhesion, permeability, and pH sensitivity, which facilitated a slow and controlled release within the gastrointestinal microenvironment due to both ionic electrostatic interactions and disulfide bonding interactions. The experiments revealed in vivo that insulin/NCT nanoparticles extended the retention time of insulin in the small intestine. Blood glucose levels decreased to approximately 39% of the initial level at 5 h post-administration while exhibiting smooth hypoglycemic efficacy. Simultaneously, insulin bioavailability increased to 12.58%.Conclusions: The NCT nanoparticles effectively protect insulin from degradation in the gastrointestinal microenvironment while overcoming intestinal barriers, thereby providing a promising approach to oral biomolecule delivery.
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产品关联
DOI
PubMed
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2014
·Vol. 70
·期 4
·649-655
·
IF 1.212
Zhang Conglu,Hou Xiaohong,Liang Ning,Ding Yueyue,Hu Xiaomin
Magnetic quaternary chitosan salt CS/EPTAC/Fe 3 O 4 was used for the removal of acid red 1 (AR1), xylenol orange (XO) and alizarin red (AR) in single, binary and ternary systems. In the single system, the maximal adsorption capacity was 781.55 for AR1, 537.40 for XO and 992.61 mg g −1 for AR at pH 3.0 and 25 °C. The adsorption kinetics of the three dyes followed the pseudo-second-order model. In the multicomponent system, preferential adsorption was observed for AR at low adsorbent quantities due to the small size of the molecule. When the adsorbent amount was greater, AR1 was adsorbed first because of the greater number of sulfonic acid roots. In the entire adsorption process, XO always adsorbed most slowly.
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DOI
高影响因子
Foods
·
2026
·Vol. 15
·期 2
·192
·
IF 5.1
Yujie Hou,Sitong Zhou,Shiqi Liu,Peng Jin,Yonghua Zheng,Zhengguo Wu
Mechanical damage and microbial contamination are major challenges in the postharvest logistics of perishable fruit. In this study, two types of functionally modified chitosan-based aerogel pads were developed to enhance cushioning and preservation of wax apples. A chitosan/polyvinyl alcohol (CP) aerogel was first optimized by adjusting solid content, CS:PVA ratio, and crosslinker concentration. The optimal formulation (2% solids, 1:1 CS: PVA, 3% glutaraldehyde) exhibited a uniform porous structure and improved compressive strength. A chitosan/montmorillonite (CM) aerogel with 5% montmorillonite (MMT) showed high porosity, low density, and excellent cyclic stability. Incorporating 10% copper nanoparticle-loaded antibacterial fibers (CuNPs-TNF) into CM aerogels yielded CM-Cu aerogels with enhanced cushioning and antimicrobial properties. Under simulated transport and cold storage conditions, all aerogel-packaged groups reduced mechanical damage and decay of wax apples. Compared to the control, the CM-Cu group showed 66% lower decay, 5% less weight loss, 6 N greater firmness, 7% less juice yield, and a 13% reduction in relative electrical conductivity. Additionally, it better preserved fruit color and total soluble solids, extending shelf life by 4 d at 20 °C. These results demonstrate the potential of chitosan-based aerogels as multifunctional packaging materials that combine mechanical protection with antimicrobial activity for perishable fruit preservation.
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2026
·
IF 3.1
Ying Hao,Jingjing Yang,Wenlu He,Qihao Sun,Jintong Zhang,Yulin Chang,Fengyuan Wang,Xiao Wu,Ping Xue,Jingyao Sun
Passive radiative cooling (PRC) provides a sustainable solution for building energy management. However, it still remains a huge challenge to fabricate cost-effective and scalable materials with complementary radiative cooling capabilities. Herein, chitosan (CS)-based hydrogels were fabricated by adding radiative cooling fillers—barium sulfate (BaSO 4 ), titanium dioxide (TiO 2 ), and silicon dioxide (SiO 2 ) to achieve selective enhancement of either solar reflectance or infrared emissivity. Through optimization of filler type and loading, CS/BaSO 4 and CS/TiO 2 hydrogels exhibit a peak solar reflectance of 87% (0.4–1.0 μm), enabling outdoor sub-ambient cooling of 7°C under peak solar radiation. The CS/SiO 2 hydrogel (S3-30) exhibits significantly improved atmospheric window emissivity of 88% (8–13 μm), facilitating efficient nighttime radiative heat dissipation. The imine-crosslinked CS networks provide excellent solid–liquid dual-phase stability, preventing water leakage while maintaining facile processability. More importantly, indoor simulations show that temperature is reduced by 2.2°C–4.2°C in model building, while 12-h outdoor field validation confirms stable sub-ambient performance. This work proposes a facile, versatile and biopolymer-based method to fabricate radiative cooling coatings with complementary functionalities, offering a new pathway toward sustainable thermal management in built environments.
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产品关联
DOI
高影响因子
iScience
·
2026
·Vol. 29
·期 9
·117200
·
IF 4.5
Xudong Li,Chengzhe Yang,Xin Li,Lanxin Li,Youbin Li,Tengyue Liu,Qiang Gao,Lanfeng Huang
Summary Large bone defects remain a clinical challenge due to limited regenerative capacity. In this study, carboxymethyl chitosan (CMCS) hydrogels incorporating gradient nano-hydroxyapatite (nHA) were developed to enhance bone repair. The composite hydrogels exhibited improved mechanical properties, controlled degradation, and good biocompatibility. In vitro , nHA-containing hydrogels promoted bone marrow mesenchymal stem cell (BMSC) proliferation and osteogenic differentiation, as shown by increased alkaline phosphatase (ALP) activity, mineralization, and upregulation of runt-related transcription factor 2 (RUNX2), osteocalcin (OCN), and bone morphogenetic protein-2 (BMP-2). In vivo , implantation in a rat distal femoral condyle defect model showed enhanced new bone formation and improved trabecular structure, particularly in the 1% nHA group. These results suggest that gradient nHA-loaded CMCS hydrogels can effectively enhance osteogenesis and support bone regeneration.
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产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2026
·
IF 13.2
Yueming Hu,Feijie Wang,Shiqiang Ouyang,Yan Ma,Qianru Meng,Zhongli Liu,Jinghan Zhang,Shufeng Ma,Liqiang Wang
Strawberries are susceptible to water loss, microbial spoilage, and quality deterioration during storage and transportation, resulting in a shortened shelf life. Intelligent packaging integrating active preservation and freshness indication can delay deterioration while providing quality feedback. Humidity variations caused by respiration and transpiration are closely associated with strawberry quality deterioration, yet their conversion into real-time data feedback remains challenging for conventional systems. Herein, a self-powered humidity-sensitive chitosan-based nanofibrous packaging material was fabricated via electrospinning. Deacetylated chitin nanocrystals (D-ChNCs) nanoframe reinforcement and tea polyphenols (TP) functionalization synergistically constructed a CTS/PEO/D-ChNCs/TP three-dimensional nanofibrous network. The heterogeneous interfaces and polar functional groups promoted triboelectric charge accumulation, enabling the triboelectric nanogenerator (TENG) based on this membrane to achieve an open-circuit voltage approaching 180 V. Benefiting from the abundant hydrophilic functional groups and large contact area, the TENG converted packaging humidity variations into voltage signals. As the relative humidity (RH) increased from 50% to 80%, the output voltage decreased linearly (R 2 = 0.993), enabling reliable humidity sensing. The D-ChNCs/TP-functionalized membrane exhibited antioxidant and antibacterial activities, delaying strawberry deterioration for 6 days. Meanwhile, the TENG output signal was strongly correlated with weight loss, firmness, and total soluble solids, enabling self-powered classification of strawberry freshness. Download: Download high-res image (235KB) Download: Download full-size image
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DOI
高影响因子
危险品化学品经营许可证（带存储）