Page 235 - 《精细化工》2023年第8期

第 40 卷第 8 期 精 细 化 工 Vol.40, No.8
20 23 年 8 月 FINE CHEMICALS Aug. 2023

建筑用化学品
氧化石墨烯-水性环氧树脂固化剂的制备及性能

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朱 科 ，李菁熠 ，王永强 ，费贵强
（1. 渭南师范学院 化学与材料学院，陕西 渭南 714099；2. 陕西科技大学 化学化工学院，教育部轻化
工助剂化学与技术重点实验室，陕西 西安 710021）

摘要：首先，将三乙烯四胺（TETA）和氧化石墨烯（GO）球磨，得到 TETA 改性 GO 分散液 TGO；然后向其
中依次滴加双酚 A 型环氧树脂 E44、三羟甲基丙烷三缩水甘油醚（TPEG）、甲氧基聚氧乙烯-2,3-环氧丙烷（MEH）
和 γ-(2,3-环氧丙氧基)丙基三甲氧基硅烷（KH560），采用原位聚合法合成了氧化石墨烯-水性环氧树脂固化剂
（TGO-WPEA）；采用上述工艺，不添加GO的条件下制得水性环氧树脂固化剂（WPEA）。将WPEA和TGO-WPEA
分别与环氧树脂乳液（Epikote-6520）复合制得水性环氧树脂（EP）和氧化石墨烯改性水性环氧树脂（TGO-EP）
防腐涂料。通过 FTIR、XPS 和 XRD 对材料进行了结构表征，采用电化学测试和盐雾实验对 TGO-EP 的防腐性
能进行了评价。结果表明，水性环氧树脂固化剂（WPEA）分子通过共价键连接到 GO 表面，改善了 GO 在 EP
中的分散稳定性和接枝率，提高了 TGO-EP 复合涂料对腐蚀介质的屏蔽性能。与纯 EP 涂层相比，TGO-EP 涂层
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腐蚀电位从–0.267 V 提高到–0.125 V，腐蚀电流密度从 5.44×10 A/cm 减小到 1.09×10 A/cm ；浸泡 20 d 后，
TGO-EP 仍具有较高的低频阻抗。
关键词：水性环氧涂料；氧化石墨烯；防腐性能；附着强度；建筑用化学品
中图分类号：TQ323.5 文献标识码：A 文章编号：1003-5214 (2023) 08-1849-08

Preparation and properties of GO-water based epoxy resin curing agent

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ZHU Ke , LI Jingyi , WANG Yongqiang , FEI Guiqiang
（1. College of Chemistry and Materials Science, Weinan Normal University, Weinan 714099, Shaanxi, China; 2. Key
Laboratory of Auxiliary Chemistry & Technology for Chemical Industry, Ministry of Education, College of Chemistry
and Chemical Engineering, Shaanxi University of Science & Technology, Xi'an 710021, Shaanxi, China）
Abstract: Triethylenetetramine (TETA)-modified graphene oxide (GO) dispersion was prepared from
ball-milled TETA and GO, into which epoxy resin E44, trimethylolpropane triglycidyl ether (TPEG),
methoxypolyoxyethylene, 2,3-propylene oxide (MEH) and γ-(2,3-epoxypropoxy)propytrimethosysilane
(KH560) were dripped to form the water-based epoxy resin curing agent (TGO-WPEA) via in situ
polymerization. The water-based epoxy resin curing agent (WPEA) was prepared by the above process
without adding GO. The waterborne epoxy resin anti-corrosion coating (EP) and graphene oxide modified
waterborne epoxy resin anti-corrosion coating (TGO-EP) anti-corrosion coatings were prepared by WPEA
and TGO-WPEA combined with epoxy resin emulsion (Epikote-6520), respectively. The structure of the
materials was characterized by FTIR, XPS and XRD, while the corrosion resistance performance of
TGO-EP was evaluated via electrochemical tests and salt spray experiments. The results showed that
TGO-WPEA molecules were covalently linked to the surface of GO, which improved the dispersion
stability and grafting rate of GO in epoxy resin (EP) as well as the shielding performance of TGO-EP
composite coatings against corrosive media. Compared with those of pure EP coating, the corrosion
potential of TGO-EP composite coating was increased from –0.267 V to –0.125 V, the corrosion current
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density decreased from 5.44×10 A/cm to 1.09×10 A/cm . TGO-EP still retained high low-frequency
impedance after 20 d of immersion.
Key words: waterborne epoxy coating; graphene oxide; anticorrosion; adhesion strength; building chemicals

收稿日期：2022-09-19; 定用日期：2023-02-22; DOI: 10.13550/j.jxhg.20220859
基金项目：陕西省自然科学基础研究计划项目（2020-JQ899）；陕西省教育厅专项科研计划项目（21JK0626）
作者简介：朱 科（1986—），男，副教授，E-mail：zk_19860508@163.com。