The preparation and study of functionalized graphene oxide/self-healing waterborne polyurethane composites

IF 2.3 4区 材料科学 Q2 Chemistry Journal of Coatings Technology and Research Pub Date : 2023-02-07 DOI:10.1007/s11998-022-00732-9
Zhiqiang Li, Zhaoyang Zhang, Shouxiang Liu, Yang Qiao, Yanyan Wei
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Abstract

In this study, silane coupling agent KH560-FA containing furan groups was synthesized to modify the surface of graphene oxide, and maleimide group-capped waterborne polyurethane was synthesized at the same time. A self-healing material with a microcrosslinking network structure based on polymer/modified graphene oxide was synthesized by Diels–Alder (DA) reaction. The materials obtained can control the formation and fracture of DA chemical bonds under thermal stimulation and repair the damage macroscopically. With the addition of modified graphene oxide from 0 wt% to 0.4 wt%, the tensile strength of the material increased from 3.59 MPa to 15.27 MPa, the repair efficiency reached a maximum of 89.19%, the water contact angle increased from 61° to 77°, and the water absorption decreased from 10.52% to 3.40%. The addition of modified graphene oxide significantly improved the hydrophobicity and mechanical properties of the material. When the addition of KH560-FA-GO was 0.4 wt%, the corrosion resistance of the coating prepared by the emulsion was remarkably improved in deionized water, 5% sodium chloride solution, and 5% sulfuric acid solution. It showed the application potential of materials in the field of coatings.

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功能化氧化石墨烯/自愈水性聚氨酯复合材料的制备与研究
本研究合成了含呋喃基团的硅烷偶联剂KH560-FA,对氧化石墨烯表面进行改性,同时合成了马来酰亚胺基包封的水性聚氨酯。采用Diels-Alder (DA)反应合成了一种基于聚合物/改性氧化石墨烯的微交联网络自愈材料。所制备的材料能够在热刺激下控制DA化学键的形成和断裂,并在宏观上修复损伤。当改性氧化石墨烯的添加量从0 wt%增加到0.4 wt%时,材料的抗拉强度从3.59 MPa增加到15.27 MPa,修复效率达到最大值89.19%,水接触角从61°增加到77°,吸水率从10.52%下降到3.40%。改性氧化石墨烯的加入显著改善了材料的疏水性和力学性能。当KH560-FA-GO添加量为0.4 wt%时,乳液制备的涂层在去离子水、5%氯化钠溶液和5%硫酸溶液中的耐蚀性显著提高。显示了材料在涂料领域的应用潜力。
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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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