Influence of modified graphene oxide on the antifouling performance of waterborne polyurethane coatings containing amphiphilic honeycomb surface

IF 2.3 4区 材料科学 Q2 Chemistry Journal of Coatings Technology and Research Pub Date : 2022-12-12 DOI:10.1007/s11998-022-00704-z
Xu Zhao, Yuhong Qi, Zhanping Zhang
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Abstract

The coating with amphiphilic honeycomb surface containing modified graphene oxide was constructed by a three-step method for improved antifouling properties. Graphene oxide is modified with potassium hydroxide and γ-aminopropyltriethoxysilane, and then the product is dispersed in water and ethanol. Isophorone diisocyanate, polyethylene glycol, and γ-aminopropyltriethoxysilane are used to construct an amphiphilic prepolymer. The honeycomb surface is constructed during the evaporation of water and ethanol and the mixing of the modified graphene oxide and prepolymer. The amphiphilic honeycomb surface gives the coating fouling resistance and fouling release, while the modified graphene oxide gives the coating fouling degradation. The coating’s amphiphilicity, microstructure, and antifouling properties are characterized by the contact angle, confocal laser scanning microscope, scanning electron microscopy, benthic diatom, and bacterial adhesion. The results show that the coatings form an amphiphilic surface with a honeycomb microstructure and exhibit good antifouling properties. The water, diiodomethane, and 1-bromonaphthalene contact angle can be less than 20°. The size and depth of the honeycomb microstructure are about 600 nm and 100–200 nm. Compared with traditional polyurethane and waterborne silicone coatings, the resistance to benthic diatom and bacteria is increased by at least 28 and 400 times, respectively.

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改性氧化石墨烯对含两亲蜂窝表面水性聚氨酯涂料防污性能的影响
采用三步法制备了两亲蜂窝表面改性氧化石墨烯涂层,提高了涂层的防污性能。用氢氧化钾和γ-氨基丙基三乙氧基硅烷对氧化石墨烯进行改性,然后将产物分散在水和乙醇中。用异福尔酮二异氰酸酯、聚乙二醇和γ-氨基丙基三乙氧基硅烷构建了两亲性预聚物。蜂窝表面是在水和乙醇蒸发以及改性氧化石墨烯和预聚物混合的过程中形成的。两亲性蜂窝表面赋予涂层抗结垢能力和结垢释放能力,而改性氧化石墨烯则赋予涂层降解结垢能力。通过接触角、共聚焦激光扫描显微镜、扫描电子显微镜、底栖硅藻、细菌粘附等对涂层的两亲性、微观结构和防污性能进行了表征。结果表明,该涂层具有蜂窝结构的两亲表面,具有良好的防污性能。水、二碘甲烷和1-溴萘的接触角可小于20°。蜂窝结构的尺寸和深度分别为600 nm和100 ~ 200 nm。与传统的聚氨酯和水性有机硅涂料相比,对底栖硅藻和细菌的抵抗力分别提高了至少28倍和400倍。
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来源期刊
Journal of Coatings Technology and Research
Journal of Coatings Technology and Research CHEMISTRY, APPLIED-MATERIALS SCIENCE, COATINGS & FILMS
CiteScore
4.40
自引率
8.70%
发文量
0
期刊介绍: Journal of Coatings Technology and Research (JCTR) is a forum for the exchange of research, experience, knowledge and ideas among those with a professional interest in the science, technology and manufacture of functional, protective and decorative coatings including paints, inks and related coatings and their raw materials, and similar topics.
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