PROGRESS IN ORGANIC COATINGS
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2021
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IF 5.161
Qianqian Shang,Jianwen Cheng,Chengguo Liu,Lihong Hu,Caiying Bo,Yun Hu,Xiaohui Yang,Xiaoli Ren,Yonghong Zhou,Wen Lei
Sustainable and durable superhydrophobic cotton fabric was fabricated by combining the eco-friendly enzyme-etching approach and hydrophobic modification. The rough surface of the fiber was constructed by cellulase etching. Superhydrophobic cotton fabric was obtained from further deposition of cardanol-based polybenzoxazine (PC-aps) by dip-coating and thermal curing. The as-prepared PC-aps coated cotton fabric (PC-aps/ECF) possessed special wettability with a water contact angle (WCA) of 154.6° ± 0.4° and an oil contact angle of 0°. The PC-aps/ECF demonstrated exceptional mechanical durability and environmental stability to sandpaper abrasion, ultrasonic treatment, accelerated laundering, corrosive liquids, and high temperature. Moreover, the PC-aps/ECF had excellent separation performance for several oil/water mixtures with high oil flux (as high as 6744.6 ± 177.9 L m −2 h −1 ) and separation efficiency (all above 99.76 %). Especially, the separation of water-in-oil emulsions was achieved by external pressure filtration using the home-made PC-aps/ECF@PU sponge@ PC-aps/ECF composite with the oil flux up to 27473.2 ± 730.7 L m −2 h −1 bar −1 and the separation efficiency as high as 99.65 %. The outstanding durability, high separation performances, and excellent reusability of PC-aps/ECF make it very suitable for waste-water treatment.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
FIBERS AND POLYMERS
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2022
·Vol. 23
·期 6
·1582-1594
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IF 2.347
Xu Qingbo,Wang Xinyu,Xu Wei,Zhang YanYan,Xu Zhenzhen
Immobilizing inorganic or organic particles on cotton fabric to increase the surface roughness, followed by coating with low surface reagents to reduce the surface energy, are the dominant strategies to prepare the superhydrophobic cotton surface. However, the inorganic or organic particles can easily fall off the surface of the fabrics. Thus, the surface roughness of the fabric could be reduced during the process, resulting in the poor durability of the superhydrophobic fabric. In this work, the surface of the cotton fabric was etched by cellulase. Following this, the treated fabric was grafted using a diblock copolymer (poly[(methyl methacrylate)- b -(2-(dimethylamino)ethyl)] (PMMA- b -PDMAEMA)), which was synthesized following the reversible addition-fragmentation chain transfer (RAFT) polymerization process. The mist polymerization technology was used for the process. The coatings successfully endowed the cotton fabric with superhydrophobic properties. The maximum WCA value recorded was 159.9 °. The treated fabric exhibited excellent mechanical and chemical stability. Moreover, the modified cotton sample also exhibited good self-cleaning effects in the presence of solid dust and liquid contaminants. It also exhibited excellent oil-water separation properties. Therefore, the superhydrophobic fabric prepared using a combination of the etching method and mist polymerization technology can find its potential application in home and industrial areas.
研究领域:
材料科学
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纺织工程
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表面化学
✓ 已验证
产品关联
DOI
高影响因子
Toxins
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2023
·Vol. 15
·期 6
·351
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IF 4.2
Rui Guo,Yue Ji,Jinnan Chen,Jin Ye,Baoxia Ni,Li Li,Yongtan Yang
In this study, a multicolor visual method based on a magnetic immunoassay and enzyme-induced gold nanobipyramids (Au NBPs) etching was developed for deoxynivalenol (DON) detection. The magnetic beads modified with high affinity DON monoclonal antibodies were used as a carrier for target enrichment and signal transformation and the Au NBPs with excellent plasmonic optical properties were served as enzymatic etching substrates. The oxidation state TMB, which was generated through catalysis of horseradish peroxidase (HRP), induced the etching of plasmonic Au NBPs, resulting in the longitudinal peak blue-shift of local surface plasmon resonance (LSPR). Correspondingly, Au NBPs with various aspect ratios displayed a variety of individual colors which were visualized by the naked eye. The LSPR peak shift was linearly related to the DON concentration in the range of 0~2000 ng/mL and the detection limit was 57.93 ng/mL. The recovery for naturally contaminated wheat and maize at different concentrations ranged from 93.7% to 105.7% with a good relative standard deviation below 11.8%. Through observing the color change in Au NBPs, samples with overproof DON could be screened preliminarily by the naked eye. The proposed method has the potential to be applied in on-site rapid screening of mycotoxins in grain. In addition, the current multicolor visual method only used for the simultaneous detection of multiple mycotoxins is in urgent need of a breakthrough to overcome the limitation of single mycotoxin detection.Keywords:deoxynivalenol;multicolor visual detection;magnetic immunoassay;gold nanobipyramids;enzymatic etchingKey Contribution:A multicolor visual method was developed for detecting DON in grain. Enzyme-induced Au NBPs etching and magnetic immunoassay were integrated. Au NBPs served as a chromogenic response substrate to display multiple vivid colors. Grain samples with overproof DON could be screened rapidly by the naked eye. The method is automatic, labor-saving, efficient, and direct reading.
研究领域:
分析化学
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纳米技术
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食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
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2022
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IF 10.723
Hongmei Yuan,Ran Hao,Haodong Sun,Wenchao Zeng,Junkang Lin,Shengchang Lu,Meiqiong Yu,Shan Lin,Jianguo Li,Lihui Chen
Membranes are the dominant material for seawater desalination and clean-water harvesting, which are commonly composed of synthetic polymers, showing low hydrophilicity and environmental hazard. Herein, we developed a low-cost, intrinsically green, superhigh-water flux Janus cellulose membrane (CEM) via a facile cellulase etching strategy. Coating cellulase on the single surface of cellulose membrane (such as top surface), triggers effective etching on its top section rather than bottom section, which architects an asymmetric-pore structure of the Janus CEM including porous top-and dense bottom-layer. Such distinction endows the Janus CEM with an unprecedented high-water flux of 135.75 LMH and a low salt-water ratio of 0.29 g·L −1 for 1 M NaCl solution, which is 17-time higher and 62-time lower than that of the pristine CEM. Our Janus CEM enables a promising participant for the advanced membrane materials toward versatile separation engineering .
研究领域:
材料科学
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环境工程
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水处理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
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2019
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IF 6.97
Quan-Yong Cheng,Xiao-Li Zhao,Yun-Xuan Weng,Yi-Dong Li,Jian-Bing Zeng
Traditional superhydrophobic materials for oil/water separation not only depend on nonrenewable feedstocks but also lead to secondary environmental pollutions after discarding, due to the presence of inorganic nanoparticles and toxic fluorine-containing chemicals. Herein, we report a fully sustainable, nanoparticle-free, and fluorine-free superhydrophobic cotton fabric (CF) fabricated via an eco-friendly method, that is, roughness creation by enzyme etching followed by surface coating with an epoxidized soybean oil thermoset and subsequent low surface energy modification with stearic acid. The superhydrophobic CF exhibited excellent durability with surface superhydrophobicity surviving from mechanical abrasion, tape peeling, ultrasonication, chemical resistance, and low/high temperature treatment, due to the enzyme etching-induced stable surface structure with covalently linked low-energy substance. The superhydrophobic CF showed excellent oil/water separation performance with a high separation efficiency and high oil flux. With outstanding mechanical robustness, chemical and environmental resistances, and excellent oil/water separation performance, the fully sustainable superhydrophobic CF can be applied as an environmentally friendly substitute to nonrenewable and harmful chemicals containing oil/water separation materials.
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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纺织工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）