文献类型：期刊文献

中文题名：石墨烯改性的涂料用水性聚氨酯乳液的制备和表征

英文题名：Preparation and Characterization of Graphene-modified Waterborne Polyurethane Emulsions for Coatings

作者：郑舒文[1];杨长龙[1];许超[1];马元生[1];王大众[1];多俊龙[1];徐立功[2]

机构：[1]国网辽宁省电力有限公司沈阳供电公司,辽宁沈阳110811;[2]华东理工大学体育科学与工程学院,上海200237

年份：2021

卷号：43

期号：8

起止页码：1151

中文期刊名：化学试剂

外文期刊名：Chemical Reagents

收录：CSTPCD;;北大核心:【北大核心2020】；

基金：国家电网公司科技项目(2020YF-08)。

语种：中文

中文关键词：氮丙啶;氧化石墨烯;水接触角;开环反应;水性聚氨酯

外文关键词：aziridine;oxidized graphene;water contact angel;ring opening react;waterborne polyurethane

摘要：利用石墨烯掺杂改性提高水性聚氨酯乳液成膜性能;将经氮丙啶基团功能化的氧化石墨烯均匀分散在多官能氮丙啶齐聚物中,配制成石墨烯重量份为10%的氮丙啶交联剂,按照不同比例将其添加在自制的羧酸基阴离子型水性聚氨酯乳液中,利用羧基同氮丙啶基团的开环交联反应制备一系列水性聚氨酯膜。并采用傅里叶红外光谱仪(FT-IR)、原子力显微镜(AFM)、热失重分析仪(TGA)、水接触角测试仪及万能试验机对样品进行表征和测试;随石墨烯含量的增加,涂膜的耐热性、疏水性、拉伸强度和表面硬度均有明显提高,而微观相分离程度和断裂伸长率则呈下降趋势。较未改性乳液,经石墨烯掺杂的水性聚氨酯更适用于输电杆塔防腐。
To improve the film-forming properties of waterborne polyurethane emulsions,graphene doping modification was used.The graphene oxide functionalized with aziridine groups was uniformly dispersed in the polyfunctional aziridine oligomer to prepare an aziridine crosslinking agent with 10%by weight of graphene.A series of waterborne polyurethane membranes by the ring-opening crosslinking reaction between the carboxyl group and the aziridine group was prepared through adding aziridine crosslinking agent to the self-made carboxylic anionic waterborne polyurethane emulsion according to different proportions.Fourier infrared spectroscopy(FTIR),atomic force microscope(AFM),thermalgravimetry analyzer(TGA),water contact angle tester and universal testing machine were used to characterize and test the samples.With the increase of graphene content,the heat resistance,hydrophobicity,tensile strength and surface hardness of the coating film were significantly improved,while the degree of microscopic phase separation and elongation at break showed a downward trend.Compared with unmodified emulsions,graphene-doped waterborne polyurethane was more suitable for anti-corrosion of transmission towers.