Journal of Environmental Chemical Engineering
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2025
·
IF 7.2
Zhenchao Gu,Zhou Li,Ying Yu,Yufei Hu,Lirong Chen,Shuaishuai Zhang
The widespread use of antibiotics has exacerbated water pollution, especially as traditional flocculation methods struggle to effectively remove persistent dissolved pollutants. Traditional coagulants often fall short of high-quality water standards due to residual toxicity and degradation issues. In contrast, natural polysaccharide-based polymeric flocculants show great promise. This study developed an efficient composite coagulation system using the complex coacervation method, enabling in situ self-assembly of chitosan (CS) and sodium carboxymethyl cellulose (CMC) in aqueous solution. The formation conditions were optimized via conductivity and Zeta potential analyses. FTIR, XPS, and SEM were used to probe the composite's microscopic structure and mechanism. Results showed the CS-CMC system outperformed chitosan alone, achieving a 99.70 % turbidity removal rate in simulated Yellow River water. It also efficiently removed various pollutants, with 87.60 % norfloxacin (NOR) and 50.12 % tetracycline (TC) removal rates. The adsorption kinetics of NOR and TC followed pseudo-second-order and intraparticle diffusion models, indicating unique interaction mechanisms beyond simple adsorption, with TC adhering to the Langmuir model and Temkin model, NOR to the Freundlich model. This eco-friendly flocculant offers an efficient, multifunctional solution for green water treatment.
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JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Yongtao Tan,Mei Xi,Yuan Zhang,Zhengda Qiao
Polymer gel electrolyte is a topic for a storage energy device. This work focuses on the double interpenetrating network polymer of polyvinyl alcohol/carboxymethyl cellulose (PVA/CMC) to graft acrylic acid (AA) and combine ZnCl 2 to form multi-polymer network gel electrolyte for zinc ion supercapacitors. The assembled zinc ion supercapacitors of commercial activated carbon (YP50)//Zn with multi-polymer network gel electrolyte exhibit higher specific capacitance of 272 F g −1 at a current density of 0.25 A g −1 than the device with polyvinyl alcohol/polyacrylic acid (PVA/PAA) or PVA electrolyte. In addition, the zinc ion supercapacitor can achieve a maximum energy density of 151.2 Wh kg −1 , higher than traditional electrical double layer supercapacitor YP50//YP50 device. Further, the device can work under different temperatures from −20∼60 °C, which can meet the requirements of some outdoor activities for energy storage devices.
研究领域:
材料科学
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能源存储
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Polymers
·
2020
·Vol. 12
·期 2
·453
·
IF 3.426
Jufang Zhu,Qiuying Li,Yanchao Che,Xingchen Liu,Chengcheng Dong,Xinyu Chen,Chao Wang
Polyvinyl alcohol (PVA)/carboxyl methyl cellulose sodium (CMC)/Na2CO3composite films with different contents of Na2CO3were prepared by blending and solution-casting. The effect of Na2CO3on the microstructure of PVA/CMC composite film was analyzed by Fourier-transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), differential scanning calorimetry (DSC), and atomic force microscopy (AFM). Its macroscopic properties were analyzed by water sorption, solubility, and dielectric constant tests. The results show that the microstructure of PVA/CMC/Na2CO3composite films was different from that of PVA and PVA/CMC composite films. In addition, compared to PVA and PVA/CMC composite films, the water sorption of PVA/CMC/Na2CO3composite films relatively increased, the solubility in water significantly decreased, and the dielectric properties significantly improved. All these results indicate that the hydrogen bonding interaction between PVA and CMC increased and the crystallinity of PVA decreased after the addition of Na2CO3. This was also a direct factor leading to increased water sorption, decreased solubility, and enhanced dielectric properties. The reaction mechanism of PVA, CMC, and Na2CO3is proposed to further evaluate the effect of Na2CO3on the microstructure and macroscopic properties of PVA/CMC/Na2CO3composite films.Keywords:PVA;CMC;Na2CO3;film
研究领域:
材料科学
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高分子化学
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复合材料
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PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
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IF 5.2
Lingli Shen,Wanqi Feng,Dan Yu,Wei Wang
Flexible humidity sensors with excellent flexibility and sensitivity have been widely used in various fields such as human and plant health monitoring and management, non-contact human-machine interaction, smart e-textiles, and industrial and agricultural production. However, many sensors are limited their application due to the problems of unbreathable and poor wear comfort. Herein, a highly sensitive humidity sensor based on flexible polyester fabric with directional moisture transport is proposed. The facile method of coating is conducted by the preparation of poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) and sodium carboxymethylcellulose (CMC-Na) paste with adjustable content and applied to the polyester fabric. The difference of hydrophilicity between the two sides of the fabric caused by the coating helps to directional moisture transport, thus giving rapid sensitivity, while using PEDOT: PSS can obtain the changes of electrical conductivity coming from the humidity. and the addition of CMC-Na not only helps the coating, but also provides hydrophilic groups, which is conducive to humidity sensing and directional moisture transport. The combination of this moisture-sensitive coating and directional moisture transport gives the sensor a fast humidity response time of 0.35 s, a wide humidity detection range (0‐100%(0–100% RH) and sensitivity of 4.15. Furthermore, the sensor can maintain the humidity response time in milliseconds even after being subjected to water washing and friction, indicating its excellent durability and stability.
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高影响因子
CELLULOSE
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2022
·Vol. 29
·期 8
·4525-4537
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IF 6.123
Wang Huiqiang,Fang Shengqiong,Zuo Miao,Li Zheng,Yu Xin,Tang Xing,Sun Yong,Yang Shuliang,Zeng Xianhai,Lin Lu
Removal of copper ions (Cu(II)) efficiently from water is crucial for water environment security. We use sustainable, low-cost, renewable cellulose derivatives (carboxymethylcellulose sodium (CMC-Na)) and polyvinyl alcohol (PVA) as the matrix, and cellulose nanocrystals (CNCs) as the functional addition. The CNC/CMC-Na/PVA hydrogel was prepared by the physical cross-linking method. Static adsorption experiments proved that CNC/CMC-Na/PVA hydrogel has a greater adsorption potential (108 mg/g) towards Cu(II). At the same time, the adsorption of Cu(II) on CNC/CMC-Na/PVA hydrogels is spontaneous and endothermic, and obeys the pseudo-second-order model with intra-particle diffusion. Furthermore, the primary adsorption mechanisms had been electrostatic attraction and surface complexation. Importantly, CNC/CMC-Na/PVA hydrogel has efficient absorbability and preferable reusability in actual water samples. Furthermore, the copper nanoparticles (Cu NPs) adsorbed on the surface of CNC/CMC-Na/PVA hydrogels were reduced with NaBH 4 in situ to realize the secondary utilization in CNC/CMC-Na/PVA hydrogels supported by Cu NPs. It is found that the material can be used as a catalyst to efficiently catalyze the conversion of HMF to BHMF (99%). Consequently, we provide insights into the hydrogel preparation that would possibly be promising novel adsorbents for the elimination of heavy-ion from sustainable water purification. Graphical abstract
研究领域:
环境科学
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材料科学
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化学工程
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水处理
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高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2024
·
IF 5.6
Chunjie Wei,Fangyong Yu,Yujiao Xie,Feipeng Wang,Feng Song,Yuan Zhang,Hongzi Tan,Hongyou Cui
The functional and environmentally friendly materials derived from cellulose have attracted increasing attention due to their extensive application. In this work, a new approach for preparation of carboxymethyl cellulose (CMC) films by adjusting the structure of cellulose with molten salt hydrates (MSHs) was proposed. The dissolving ability of cellulose in single and mixed MSHs was studied, and the structure of regenerated cellulose was characterized. The mechanism of cellulose dissolution and regeneration revealed that cellulose regenerated from mixed MSH (LiCl–2ZnCl 2 –6H 2 O) was conducive to derivatization. CMC films were synthesized from regenerated cellulose, and their structure–property relationships were investigated. CMC films with good mechanical strength and transmittance and CMC-H films with water resistance and flexibility were successfully prepared, illustrating that adjusting cellulose structure by using MSHs is an effective strategy for developing multifunctional CMC films.
研究领域:
材料科学
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环境科学
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化学工程
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高影响因子
MATERIALS & DESIGN
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2020
·
IF 6.289
Miaomiao He,Feiyang Ou,Yue Wu,Xiaodong Sun,Xianchun Chen,Han Li,Dan Sun,Li Zhang
In this work, a multi-layer wound dressing consisting of polyvinyl alcohol (PVA) foam and electrospun sodium carboxymethylcellulose (CMC) surface mesh was developed and characterized. Antimicrobial drug stearyl trimethyl ammoium chloride (STAC) was loaded into the PVA foam for infection control and the CMC surface mesh offers effective hemostatic function. Additionally, the potential of laser photodynamic response of the loaded methylene blue (MB) and its effect in enhancing the wound dressing's bacterial inhibition has been investigated. The antibacterial drug and laser photodynamic therapy (PDT) were jointly deployed, which demonstrated greater potential in killing both S. aureus and E. coli bacteria strains. In addition, the unique color changing property of MB has enabled real time bacterial infection monitoring of the wound dressing. The multi-layer wound dressing with ideal material combination and unique multifunctionality may be a promising option for wound management in the future healthcare sector.
研究领域:
生物医学工程
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材料科学
·
伤口护理
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高影响因子
Frontiers of Materials Science
·
2022
·Vol. 16
·期 4
·1-13
·
IF 2.612
Chen Fenglan,Liu Xin,Wang Zhengya,Tie Shengnian,Wang Chang-An
As a kind of essential hydrated salt phase change energy storage materials, mirabilite with high energy storage density and mild phase-transition temperature has excellent application potential in the problems of solar time and space mismatch. However, there are some disadvantages such as supercooling, substantial phase stratification and leakage problem, limiting its further applications. In this work, for the preparation of shaped mirabilite phase change materials (MPCMs), graphene (GO), sodium carboxymethyl cellulose (CMC), and carbon nanofibers (CNFs) were used as starting materials to prepare lightweight CMC/rGO/CNFs carbon aerogel (CGCA) as support with stable shape, high specific surface area, and well-arranged hierarchically porous structure. The results show that CGCA has regular layered plentiful pores and stable foam structure, and the pore and sheet interspersed structure in CGCA stabilizes PCMs via capillary force and surface tension. The hydrophilic aerogels supported MPCMs decrease mirabilite leaking and reduce supercooling to around 0.7–1 °C. The latent heats of melting and crystallization of CGCA-supported mirabilite phase change materials (CGCA-PCMs) are 157.1 and 114.8 J·g −1 , respectively. Furthermore, after 1500 solid—liquid cycles, there is no leakage, and the retention rate of crystallization latent heat is 45.32%, exhibiting remarkable thermal cycling stability.
研究领域:
材料科学
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能源工程
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DOI
高影响因子
Materials Today Sustainability
·
2022
·
IF 7.244
Y. Guo,X. Li,Z. Wang,H. Guo,J. Wang,F. Meng,G. Yan
The growing demand for high energy density lithium-ion batteries (LIBs) has made the development of thick electrodes crucial. However, thick electrodes generally show poor rate capability due to the slow ionic transmission, which restricts their application. Herein, this work employed bacteria cellulose (BC) to fabricate free-standing thick LiMn 2 O 4 (LMO) electrodes via vacuum filtration method combined with freeze-drying. Bacteria cellulose endowed thick electrodes with excellent flexibility and good mechanical strength . Simultaneously, Li + -conducting binder, that is carboxymethyl cellulose lithium (CMC-Li), was added to provide thick electrodes with promoted Li + transmission and improved dynamic performance. The properties of CMC-Li were demonstrated in detail. Then, the structure and electrochemical performance of prepared free-standing thick electrodes were characterized systematically. More importantly, the mechanism of enhanced dynamic performance by CMC-Li was clarified clearly. This work paves a new way to prepare free-standing thick electrodes with high energy density and superior rate capability.
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JOURNAL OF MOLECULAR CATALYSIS B-ENZYMATIC
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2013
·
IF 2.823
Jun Liu,Hongtao Guo,Qiongbo Zhou,Jianying Wang,Bokai Lin,Haibo Zhang,Zhanyang Gao,Chunlan Xia,Xiaohai Zhou
Herein, we demonstrated a environmental-friendly biocatalytic route for the synthesis of dimethyl carbonate (DMC), which is the first example to use enzyme in the process. Moreover, immobilization of Penicillium expansum lipase (PEL) using environmentally benign and biodegradable CMC–PVA polymer has significantly enhanced the catalytic activity thus making them an eligible biocatalyst for synthesis of DMC. The biocatalyst revealed high catalytic performance even under ambient pressure and low temperature (conversion of EC to 94%, yield of DMC to 93% and selectivity of DMC to 99%). The immobilized lipase was effectively recycled for four consecutive cycles providing good yields of the desired product. Accompanying with the intense requirement for the green chemicals and process, our work can provide a useful idea for “green and clean” of harmful chemical reaction.
研究领域:
生物催化
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绿色化学
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酶工程
·
有机合成
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
·
IF 8.5
Xiaojun Wang,Jiaqi Wu,Baolong Wang,Zhuofan Mao,Qiang Li,Yuanlin Zhu,Jing Li,Runhua Lu,Wenfeng Zhou,Haixiang Gao,Shuwen Hu
Enhancing water retention and crop productivity in widespread, challenging saline-alkali soils necessitates sustainable amendment strategies. This study reports the development and evaluation of a novel biodegradable hydrogel synthesized from natural polymers—chitosan (CS) and sodium carboxymethyl cellulose (CMC)—utilizing silk fibroin (SF) self-assembly for physical crosslinking, thereby avoiding toxic chemical agents. The resulting CS-CMC-SF hydrogel possessed a hierarchical porous structure (BET surface area ~ 163 m 2 /g), exhibited high equilibrium water absorbency (~130–144 g/g in deionized water), demonstrated favorable swelling stability under relevant pH and salinity conditions, possessed thermal stability up to approximately 200 °C, and showed ready biodegradability (~78 % weight loss in 14 days soil burial). Application of this hydrogel at 0.5 % (w/w) to saline-alkali soil significantly increased its maximum water holding capacity by 103 % and markedly reduced the rate of water evaporation compared to unamended soil. Consequently, incorporating 0.1 % (w/w) hydrogel into the saline-alkali soil significantly promoted early wheat seedling growth, enhancing root length (~+38 %), leaf length (+20–43 %, variety dependent), biomass accumulation (+24–71 %), and plant water status under stress conditions. These findings highlight the potential of this biodegradable, natural polymer-based hydrogel, prepared via a green physical crosslinking method, as an effective soil amendment strategy to improve water resource utilization and enhance crop resilience in challenging saline-alkali agricultural systems.
研究领域:
农学
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高分子科学
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土壤科学
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植物生理学
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环境科学
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DOI
PubMed
高影响因子
TENSIDE SURFACTANTS DETERGENTS
·
2022
·Vol. 59
·期 3
·221-230
·
IF 1.058
Fengli Gong,Hong Xu,Jinxiang Dong
Sodium oxalate (Na 2 C 2 O 4 ) is an excellent phosphorus-free agent, but in sodium oxalate-containing detergents with sodium dodecylbenzene sulfonate (SDBS) and sodium carboxymethyl cellulose (CMC), significant ash deposition occurs on cotton fabrics. SDBS is the main anionic surfactant in modern detergents and cotton fiber is the most commonly used textile fiber. In this study, sodium lignosulfonate (LS) was investigated for its ability to prevent redeposition in SDBS-Na 2 C 2 O 4 -CMC-LS formulations. The effects of LS on ash content, whiteness, optimum washing temperature, calcium oxalate morphology, zeta potential and surface tension were carefully analyzed. The results showed that the addition of LS significantly improved the prevention of ash deposits on cotton fibers. The ash content was less than 0.46% and a small amount of particles were scattered on the cotton fibers. LS showed good dispersibility but had little effect on the washing power and zeta-potential.
研究领域:
材料科学
·
纺织工程
·
表面化学
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高影响因子
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