Desalination and Water Treatment
·
2024
·
IF 1
Weili Wang,Yangyang Du,Mingyu Liu,Mengmeng Yang,Runping Han
Chitosan (CS) modified multi-walled carbon nanotubes (MWCNTs) were used as adsorbents (CS-MWCNTs) to adsorb Congo red (CR, anionic dye) from solution in batch mode. The structure and morphology of CS-MWCNTs were characterized by TEM, FTIR, Raman and XPS. The results from analysis of FTIR and XPS showed that CS was successfully loaded onto the MWCNTs. Raman analysis showed that the basic structure of MWCNTs after CS modification did not change. Adsorption studies were performed at different pH, coexisted ions concentrations, contact time and CR concentrations in the batch mode. Results showed that the pH of CR solution at 4.0 was best for the adsorption and the adsorption capacity could reach up to 623 mg-g -1 at 303K. The adsorption of the CR solution reached equilibrium within 8 h. Adsorption equilibrium data can be predicted by the Freundlich model while the kinetic adsorption data follow a pseudo-second-order model. Thermodynamic results showed that the adsorption process was spontaneous, and endothermic. The CR-loaded adsorbent can be regenerated using a 0.01 mol-L -1 NaOH solution, the regeneration rate can still reach 71% after three cycles. CS-MWCNTs may be available in removal of anionic dyes from solution.
研究领域:
环境科学
·
材料科学
·
化学工程
·
水处理
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DOI
高影响因子
Fire-Switzerland
·
2026
·Vol. 9
·期 7
·272
·
IF 3.2
Mei Zhao,Guoqiang Dong,Xu Lu,Yajie Zhao,Jingjing Gao,Xinxin Wei,Chenhui Xu,Yu Liu,Lianqiang Li,Yachao Wang
A novel material, chitosan oligosaccharide@melamine polyphosphate (CMP), with enhanced flame-retardant and hydrophobic properties, was synthesized by cross-linking melamine polyphosphate (MPP) with chitosan oligosaccharide. Compared with MPP, the CMP overcomes its inherent drawbacks when used as a flame retardant in polylactic acid (PLA) composites, namely the high loading demand and unsatisfactory interfacial compatibility with the polymer matrix. The results demonstrated that the peak heat release rate (p-HRR) dropped significantly in comparison to pure PLA, from 304.69 kW·m−2to 210.39 kW·m−2, while the fire performance index (FPI) increased from 0.1 to 0.48 s·m−2·kW−1. Furthermore, the fire growth index (FGI) decreased from 1.51 kW·m−2·s−1to 1.03 kW·m−2·s−1. Additionally, the CMP demonstrated enhanced thermal stability, making the pyrolysis activation energy Eαincrease from 135.04 to 191.97 kJ/mol during 308~416 °C by pyrolysis kinetics. Compared to composite PLA incorporating pristine MPP, the CMP-modified counterpart exhibits superior mechanical properties and significantly enhanced hydrophobicity, evidenced by a maximum water contact angle reaching 93.96°. It provides a strategy for adapting phosphorus-based flame retardants for PLA, thereby broadening their applicability across diverse scenarios.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Jialin Liu,Dongzi Zhou,Zitong Wang,Fangli Sun,Haicun Yang,Junfeng Cheng,Dong Wang,Dun Wu,Cheng Zhang,Chunlin Liu,Louis C. P. M. de Smet,Zheng Cao
Sn nanoparticle–carbonized (Sn@C) nanofibers via electrospinning + calcination • Sn@C + chitosan (CS) ⇒ CS/Sn@C layers by spin coating • Layer tested for humidity sensing by quartz crystal microbalance (QCM) • High repeatability and reversibility; low humidity hysteresis • Combining structural integrity (Sn@C) + water adsorption sites (CS) SnCl₂·2H₂O was introduced into polyacrylonitrile (PAN) nanofibers through a simple electrospinning method, and composite Sn nanoparticle–carbonized (Sn@C) nanofibers were prepared by two-stage calcination. After dispersing different amounts of composite nanofibers in a 2.5 wt% chitosan (CS) solution via ultrasonication, a series of CS/Sn@C composite humidity-sensitive layers were spin-coated on quartz crystal microbalance (QCM) sensor surfaces. The morphology, structure, and composition of Sn@C nanofibers were analyzed by SEM, TEM, XPS, and BET. The diameter of Sn@C nanofibers was decreased from 180 nm to 95 nm upon decreasing the PAN content from 90% to 60%. The presence of metallic Sn nanoparticles, formed on the surface of Sn@C nanofibers, resulted in an increase in specific surface area from 5.1 m²·g⁻¹ to 106.5 m²·g⁻¹. Using an electrospinning solution with PAN:SnCl₂·2H₂O (8:2 w/w) and a Sn@C dispersion (0.05 mg/mL) in 2.5 wt% CS solution, a QCM sensor with a fitting correlation coefficient of 0.9998 was fabricated. The sensor parameters were optimized through QCM testing under varying conditions. The sensor demonstrated fast response/recovery times: <1.2 s (response)/50 s (recovery) in 11–33% RH and 67 s/37 s in 11–98% RH. Additionally, the CS/Sn@C-modified QCM sensor exhibited high repeatability, reversibility, and low humidity hysteresis. Download: Download high-res image (169KB) Download: Download full-size image
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DOI
高影响因子
BIOMACROMOLECULES
·
2026
·
IF 5.9
Shaohua Xiong,Chaoxing Chen,Zikang Yang,Xiaoyan Wang,Hongli Zhang,Bowen Huang,Qiong Wu,Genxi Yu,Tian Gao,Hao Xu,Huan Xu
Hydrogel dressings offer a promising treatment option for the bacterial infection of skin wounds. In this work, we developed multifunctional hydrogels by incorporating carbon nanotubes and protocatechualdehyde into a thiolated chitosan network via multiple interactions. The hydrogels exhibited tunable adhesion (2.7–3.1 kPa), on-demand detachment, as well as restorable antioxidant activity, approximately 80% of its original level. They demonstrated electrical conductivity, in the range of 0.009–0.027 S/m, and maintained stability for nearly 400 s under pressing cycles, suitable for monitoring physiological signals. They demonstrated potent mild photothermal antibacterial capability under near-infrared (NIR) light, with the temperature increasing to 48 ± 0.85 °C and the antibacterial rate up to 99.9%. In an infected mouse wound model, the hydrogels with NIR irradiation achieved ∼ 99.9% wound closure by day 9, outperforming a commercial antibiotic ointment. This work presents a comprehensive strategy for integrated biomass-based wound management systems, combining advanced therapy with smart bioelectronic sensing.
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2026
·
IF 8.7
Yuting Fu,Anji Chen,Ziyi Fu,Qingjuan Zhang,Wuqiang Deng,Liuyun Jiang,Xiang Hu
Polysaccharide-based hydrogels with integrated bioactive functionality are highly desirable for wound dressing applications. Here, we report an injectable, self-healing hydrogel (OPC@Sal) fabricated via dynamic Schiff-base crosslinking between oxidized pullulan (OPL) and carboxymethyl chitosan (CMCS), with simultaneous incorporation of salidroside as a therapeutic agent. The gelation kinetics, mechanical properties, and microstructure were finely tuned by varying the OPL concentration at a fixed oxidation degree. The optimized OPC@Sal hydrogel exhibited rapid self-healing, excellent injectability, favorable biocompatibility, moisture retention, exudate absorption, and sustained salidroside release, along with pronounced antibacterial activity against E. coli and S. aureus . In vitro, the hydrogel effectively scavenged intracellular reactive oxygen species and suppressed the expression of pro-inflammatory cytokines (TNF-α, IL-6, IL-1β) in LPS-stimulated macrophages. Based on the established in vitro effects, network pharmacology analysis was performed as a mechanistic interpretation tool, identifying key targets (TNF-α, IL-6, CASP3, IL-1β) through which salidroside exerts its multi-target regulation of wound healing. In a mouse full-thickness skin defect model, OPC@Sal significantly accelerated wound closure, promoted collagen deposition, and enhanced re-epithelialization. Collectively, this work establishes a fully polysaccharide-derived hydrogel platform that synergistically integrates structural functionality with intrinsic bioactivity. The molecular engineering of oxidized pullulan and carboxymethyl chitosan, combined with network pharmacology-guided active compound selection, offers a sustainable and scalable strategy for developing advanced wound dressings.
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2018
·
IF 3.141
Juzheng Song,Jie Liu,Wei Zhao,Yan Chen,Hang Xiao,Xiaoyang Shi,Yilun Liu,Xi Chen
Developing inexpensive and highly efficient CO2 air capture technologies is an important solution for solving the greenhouse problem. In this work, we used the low-cost quaternized chitosan (QCS)/poly(vinyl alcohol) (PVA) hybrid aerogels with quaternary ammonium groups and hydroxide ions to reversibly capture CO2 from ambient air by humidity swing. The CO2 capture capacity and adsorption rate of the aerogels were investigated over the temperature range 10–30 °C. The CO2 capture capacity of the aerogels was measured to be about 0.18 mmol/g, which is 38% higher than the state-of-the-art commercial membrane. In addition, we proposed a modified pseudo-first-order kinetic model considering both the CO2 adsorption and the H2O desorption, which describes the experimental results very well. For the first time, the moisture-swing CO2 adsorbent is built by low-cost biomass material, which opens up a new approach for the design of the moisture-swing CO2 adsorbent.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2013
·Vol. 15
·期 9
·1-9
·
IF 2.175
Chen Zhanguang,Wang Zhen,Chen Xi,Xu Haixiong,Liu Jinbin
In this contribution, novel chitosan-stabilized gold nanoparticles (AuNPs) were prepared by mixing chitosan with citrate-reductive AuNPs under appropriate conditions. The as-prepared chitosan-stabilized AuNPs were positively charged and highly stably dispersed in aqueous solution. They exhibited weak resonance light scattering (RLS) intensity and a wine red color. In addition, the chitosan-stabilized AuNPs were successfully utilized as novel sensitive probes for the detection of heparin for the first time. It was found that the addition of heparin induced a strong increase of RLS intensity for AuNPs and the color change from red to blue. The increase in RLS intensity and the color change of chitosan-stabilized AuNPs caused by heparin allowed the sensitive detection of heparin in the range of 0.2–60 μM (~6.7 U/mL). The detection limit for heparin is 0.8 μM at a signal-to-noise ratio of 3. The present sensor for heparin detection possessed a low detection limit and wide linear range. Additionally, the proposed method was also applied to the detection of heparin in biological media with satisfactory results.
研究领域:
纳米技术
·
分析化学
·
生物传感器
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DOI
PubMed
高影响因子
FIBERS AND POLYMERS
·
2022
·Vol. 23
·期 10
·2707-2716
·
IF 2.347
Zhu Shengyu,Pei Jiliu,Song Yukang,Liu Yu,Xue Feng,Xiong Xiaohui,Li Chen
This study aimed to improve the physicochemical properties of chitosan (CS) film by riboflavin (RF)-induced cross-linking under ultraviolet (UV) light for different times (0, 2, 4, 6 h). It was found that the water vapor resistance, tensile strength, optical property, and thermal stability of the film were significantly enhanced under RF-induced photo-crosslinking, especially when illuminated for 6 h. Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) verified the molecular bonding of CS and RF, as well as scanning electron microscope (SEM) showed a tighter and more uniform film structure was formed through UV crosslinking. Thus, the CS-RF films have the potential to replace petrochemical materials as a novel type of environmentally friendly packaging material.
研究领域:
材料科学
·
高分子化学
·
环境科学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Ting Lü,Shuang Zhang,Dongming Qi,Dong Zhang,Hongting Zhao
A series of quaternized chitosan (QC)-grafted magnetic nanoparticles (MNPs) were successfully synthesized for demulsification from aqueous environments. Fe 3 O 4 MNPs were synthesized by using a coprecipitation method, followed by surface coating with silica and aminopropyl to form a surface for further grafting of QC molecular chains . The synthetic magnetic flocculants were characterized by various technologies and their demulsification performances were evaluated in detail as a function of dosage, QC grafting ratio ( G q ), pH and magnetic field. Results showed that pH did not significantly affect oil–water separation performance and MNPs with high G q exhibited enhanced separation efficiency. The separation capacity was estimated to be >105 mg of diesel oil/mg of magnetic flocculant. Recycling experiment indicated the magnetic flocculant could be recycled up to at least 7 cycles at various pH levels. The grafted QC layer endowed the hybrid MNPs with permanent positive surface charges, thus allowing them to flocculate negatively charged oil droplets via electrostatic patching. The magnetic field could not only accelerate the separation of resulting flocs, but also remove the MNPs-coated dispersed oil droplets. In conclusion, QC-grafted MNPs provide a potentially new technique for developing environmentally friendly and highly efficient magnetic flocculant for practical demulsification applications.
研究领域:
环境科学
·
材料科学
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DOI
PubMed
高影响因子
COMPOSITES COMMUNICATIONS
·
2022
·
IF 7.685
Qiaoyun Wu,Ling Wang,Peng Ding,Yaling Deng,Oseweuba Valentine Okoro,Amin Shavandi,Lei Nie
In this study, medical hydrogels (TGs) were fabricated based on thiolate-modified chitosan (TCS) and methacrylate gelatin (GelMA) using the Thiol-Michael addition reaction. The hydrogels were formed via the Michael reaction between TCS and GelMA and determined to have an equilibrium swelling rate of more than 1100% while simultaneously providing a moist environment for the wound, and limiting crust formation. The porosity of the prepared hydrogel was also shown to have a positive correlation with the concentration of the thiolated chitosan in the formulation. A positive correlation between hydrogel strain and stress properties and increasing concentrations of thiolated chitosan was also observed. The cytocompatibility of the prepared hydrogels was also tested and confirmed using CCK-8 assay after 5 days of culture, and the best antimicrobial properties were observed with the hydrogel containing TCS and GelMA in the mass ratio of 1:2. The present study was, therefore, able to highlight the potential of a simple and low-cost approach to developing cytocompatible hydrogels with antibacterial properties and tunable mechanical properties based on the well-studied GelMA. This study implies that the produced hydrogels can have future applications in fabricating skin wound healing dressings.
研究领域:
生物材料学
·
医学工程
·
组织工程
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DOI
高影响因子
Catalysts
·
2017
·Vol. 7
·期 10
·302
·
IF 3.082
Ni Tu,Jianxin Shou,Huaping Dong,Jin Huang,Yimin Li
Clay/chitosan composite beads were prepared and used as the carrier to support lipase by adsorption, to improve the activity and stability of lipase in the hydrolysis of olive oil. Under conditions of pH 6.0, 25 °C and adsorption for 10 h, immobilized lipases on chitosan bead (CB–lipase) and three clay/chitosan composite beads, at different clay to chitosan proportions of 1:8 (CCB-8-lipase), 1:5 (CCB-5-lipase) and 1:3 (CCB-3-lipase), were prepared. By comparing the activity of these immobilized lipases, CCB-5-lipase showed the highest activity, followed by CCB-8-lipase > CCB-3-lipase > CB-lipase; this improvement was attributed to the synergetic effect of enrichment of olive oil by clay at the reaction surface and better biocompatibility of chitosan with lipase molecules. The optimum pH and temperature in the reaction respectively changed from 7.0 and 30 °C for free lipase to 7.5 and 35 °C for immobilized forms. Furthermore, the thermal stability and repeated usability of these immobilized lipases were sequenced as CCB-3-lipase > CCB-5-lipase > CCB-8-lipase > CB–lipase, due to greater rigidity of immobilized lipase with the addition of clay, which was further confirmed by SEM. The study shows that the incorporation of clay with chitosan creates a good synergetic effect to improve the catalytic performance of immobilized lipase on clay/chitosan composite.
研究领域:
生物催化
·
酶工程
·
材料科学
·
应用微生物学
·
分子生物学
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DOI
高影响因子
Chemical Engineering Journal Advances
·
2022
·
IF 0
Qiang Liu,Weixin Xiao,Bin Liao,Kaiqi Yan,Jingjie Zhang
Solar-driven interfacial evaporation technology has been regarded as one of the most promising desalination technologies due to its features of high efficiency, energy-saving and low cost. However, designing a sustainable evaporator integrating light absorption, thermal management, water transport and salt resistance remains a significant challenge. Herein, we report the fabrication of a chitosan aerogel-carbon nanotubes (CA-CNT) double-layer structured evaporator by depositing CNT on the top part of CA substrate, prepared through unidirectional freezing method. The hydrophilic CA substrate exhibits low thermal conductivity and internal vertical aligned pore structure, benefiting evaporation efficiency, water transportation and salt resistance. The upper CNT layer shows an outstanding optical absorption rate of 95.04%. At one solar intensity (1 kw m −2 ), the evaporation rate of the evaporator was 1.55 kg m −2 h −1 with an evaporation efficiency of 97.15%. Its practical applicability was tested under outdoor natural light condition, and the freshwater yield was 7.15 kg m −2 d −1 . In addition, the evaporator showed good heavy metal and dye sewage purification capacity. This work provides a facile strategy for recovering freshwater from seawater and sewage.
研究领域:
材料科学
·
环境科学
·
能源工程
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DOI
危险品化学品经营许可证（带存储）