石墨烯基疏水单体的制备及其防水乳液的应用

doi:10.16085/j.issn.1000-6613.2019-1651

摘要/Abstract

摘要：

采用新癸酸缩水甘油酯（E10P）、甲基丙烯酸羟乙酯（HEMA）、异佛尔酮二异氰酸酯（IPDI）对氧化石墨烯（GO）进行接枝疏水烷基链，得到可水分散性的含碳碳双键的石墨烯基疏水单体（IHGOE）。在壳中引入IHGOE和丙烯酸酯类单体通过自由基聚合得到石墨烯改性的丙烯酸酯有机无机杂化核壳乳液。并通过FTIR、XPS、TG、SEM、粒径等测试对乳液进行了结构分析，并测试了乳液配方中IHGOE含量对涂膜的接触角、附着力、硬度、耐水煮、耐水性、耐酸碱性等性能的影响。结果表明，当乳液配方中IHGOE质量分数为20%时，涂膜的接触角达到最大，即为110.8°，比纯丙烯酸酯乳液涂膜接触角74.3°高出49.1%，显著提高了涂膜的防水性能。同时，涂膜附着力为0级，硬度为2H，耐水煮≥1h，耐水浸泡大于48h，耐丁酮擦拭（1kg）大于100次，耐5%NaOH水溶液浸泡大于24h，耐5%HCl水溶液浸泡大于24h。

关键词: 氧化石墨烯, 乳液, 防水性, 聚合物, 合成

Abstract:

In this paper, a water dispersible hydrophobic monomer with C $? ????$ C bond based on graphene (IHGOE) was prepared by grafting hydrophobic alkyl chain derived from glycidyl neodecanoate (E10P) through chemical action with hydroxyethyl methacrylate (HEMA), and isophorone diisocyanate (IPDI). Hybrid emulsion with core/shell structure was further prepared by free radical polymerization with acrylate monomers after introducing the IHGOE into the shell layer. And its structure was chartered by FTIR, XPS, TG, SEM, and DSL. The effects of the IHGOE on the performance of practical application was also investigated including the water contact angle (CA), adhesion, hardness, water resistance, water resistance. The results demonstrated that the film of the emulsion exhibited the best performance when the mass fraction of IHGOE in the emulsion formulation was 20%, i.e. the CA of 110.8° overmatched the pure acrylate emulsion film with CA of 74.3°, which greatly enhanced its water proof. The adhesion of the film is 0 grade, the hardness is 2H, the resistant time of boiling water reached one hour, water-resistant immersion time was above 48h, butanone-resistant wiping (1kg) was above 100 times, and both the immersion time in 5% NaOH and 5% HCl solution were above 24h.

Key words: graphene oxide, emulsions, waterproofness, polymers, synthesis

中图分类号:

TQ630.4

曹思娟, 刘晓国, 宋松林, 刘华溪. 石墨烯基疏水单体的制备及其防水乳液的应用[J]. 化工进展, 2020, 39(S1): 186-194.

Sijuan CAO, Xiaoguo LIU, Songlin SONG, Huaxi LIU. Preparation of a hydrophobic monomer based on graphene oxide andits application in the waterproof emulsion[J]. Chemical Industry and Engineering Progress, 2020, 39(S1): 186-194.

图/表 8

表1 壳预乳化液配方中不同含量的IHGOE氧化石墨烯改性丙烯酸酯乳液涂膜的基本性能

w(IHGOE)/%	附着力(级)	硬度/H	耐水煮/h	耐5%NaOH浸泡/h	耐5%HCl浸泡/h	耐水浸泡/h	耐丁酮擦拭（1kg）/次	接触角/(°)
0	0	H	≥1	＞24	＞24	＞48	＞100	74.3
5	0	H	≥1	＞24	＞24	＞48	＞100	83.4
10	0	H	≥1	＞24	＞24	＞48	＞100	87.5
15	0	2H	≥1	＞24	＞24	＞48	＞100	90.0
20	0	2H	≥1	＞24	＞24	＞48	＞100	110.8
25	1	2H	≥1	＞24	＞24	＞48	＞100	101.4

图1 壳预乳化液配方中 IHGOE不同质量分数的氧化石墨烯改性丙烯酸酯乳液涂膜的接触角

图2 IHGOE不同质量分数的丙烯酸酯乳液的粒径分布图

图3 GO、IHGO、IHGOE以及IHGOE改性丙烯酸酯乳液的红外光谱图

图4 IHGOE不同质量分数的XPS全谱图

图5 未添加IHGOE和添加质量分数为20%IHGOE的丙烯酸核壳乳液的SEM图

图6 未添加IHGOE和添加质量分数为20%IHGOE的丙烯酸乳液的TEM图

图7 IHGOE改性丙烯酸酯乳液胶膜的TG和DTG图

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