Polymers
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2024
·Vol. 16
·期 11
·1570
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IF 4.7
Chuanying Wei,Yan Zhang,Zhen Tang,Changan Zhang,Jianhua Wu,Bo Wu
Poly(dimethylsiloxane) (PDMS) coatings are considered to be environmentally friendly antifouling coatings. However, the presence of hydrophobic surfaces can enhance the adhesion rate of proteins, bacteria and microalgae, posing a challenge for biofouling removal. In this study, hydrophilic polymer chains were synthesised from methyl methacrylate (MMA), Poly(ethylene glycol) methyl ether methacrylate (PEG-MA) and 3-(trimethoxysilyl) propyl methacrylate (TPMA). The crosslinking reaction between TPMA and PDMS results in the formation of a silicone-based amphiphilic co-network with surface reconstruction properties. The hydrophilic and hydrophobic domains are covalently bonded by condensation reactions, while the hydrophilic polymers migrate under water to induce surface reconstruction and form hydrogen bonds with water molecules to form a dense hydrated layer. This design effectively mitigates the adhesion of proteins, bacteria, algae and other marine organisms to the coating. The antifouling performance of the coatings was evaluated by assessing their adhesion rates to proteins (BSA-FITC), bacteria (B. subtilisandP. ruthenica) and algae (P. tricornutum). The results show that the amphiphilic co-network coating (e.g., P-AM-15) exhibits excellent antifouling properties against protein, bacterial and microalgal fouling. Furthermore, an overall assessment of its antifouling performance and stability was conducted in the East China Sea from 16 May to 12 September 2023, which showed that this silicon-based amphiphilic co-network coating remained intact with almost no marine organisms adhering to it. This study provides a novel approach for the development of high-performance silicone-based antifouling coatings.
研究领域:
材料科学
·
海洋生物学
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化学工程
·
环境科学
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产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2019
·
IF 3.206
Zixiang Qu,Lizhen Wang,Shimin Fang,Dawei Qin,Jianhua Zhou,Geng Yang,Hongdong Duan
Hydrogels are attracting carriers for immobilization of small molecules due to their excellent properties, such as low optical background, recyclable and high loading ability. Several advantages will be found in designing optical sensors by utilizing hydrogels, such as the convenience for operation, the easiness to separate from media and the difficulties to introduce impurities to detection environment. As a fluorescein-based sensor for Hg 2+ , the N-(Fluorescein) lactam-N′-methylethylidene ( FLA ) was synthesized, and the structure confirmation process was finished by 1 H NMR, 13 C NMR, FT-IR and mass spectrometry. The interaction of FLA with various mental ions demonstrated the high selectivity to Hg 2+ , which was proved by UV–Vis and fluorescence spectrometry analysis. Meanwhile, the binding mode of FLA Hg 2+ was characterized by FT-IR, 1 H NMR and UV–Vis spectrophotometry . Then, counting FLA as functional monomer and MBA as crosslinker, different proportions of acrylamide (AAm), 2-hydroxyethyl methacrylate (HEMA) and methyl methacrylate (MMA) were copolymerized with FLA and N , N ′-methylenebisacrylamide (MBA) to prepare hydrogel sensors. The hydrogel sensor was characterized by colorimetry and swelling properties. At last, the prepared hydrogels is capable to respond to different colors of Hg 2+ in water or DMSO, and it can be reused after the treatment with ethylenediamine (EDA) solution.
研究领域:
材料科学
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分析化学
·
环境科学
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产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2020
·
IF 4.469
Chen Hua,Kaimin Chen,Zun Wang,Xuhong Guo
Cationic latexes have received wide attention due to their special properties and potential applications in wood coatings, fabric treatment, etc. However, the practical application of cationic latexes was hindered due to their poor stability, especially the alkali resistance stability. In this work, various stable cationic polyacrylate latexes were prepared by an efficient route. Three cationic comonomers, i.e., methacrylatoethyl trimethyl ammonium chloride (DMC), 2-(dimethylamino)ethyl methacrylate (DMAEMA), and 2-aminoethyl methacrylate hydrochloride (AEMH), were used in the aqueous semi-continuous seeded emulsion polymerization of methyl methacrylate (MMA) and butyl acrylate (BA) using cetyl trimethyl ammonium bromide (CTAB) and 2,2′-azobis[2-(2-imidazolin-2-yl)propane] dihydrochloride (AIBI) as the cationic emulsifier and initiator, respectively. The alkali resistance of the latex could be significantly improved by the addition of cationic monomer DMC and be simply tuned by adjusting DMC dosage. The improved stability of the latex might originate from the higher charge density on the surface of the latex by the introduction of DMC. Moreover, the effects of initiator dosage, emulsifier dosage and different cationic comonomers on the latex preparation and the film properties were also systematically investigated. This work not only introduces an efficient route to prepare cationic latexes with superior stability, but also paves the way for latexes to be used in applications such as textile finishing, paper industry, and biomedical field, etc.
研究领域:
材料科学
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化学工程
·
高分子化学
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产品关联
DOI
高影响因子
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