Ymer N120改性非离子型水性环氧乳液的制备与性能研究  

Preparation and properties of Ymer N120 modified non-ionic waterborne epoxy emulsion

作　　者：孙世雄 陈亚军[1,2] 张明辉 赵本波 邓平 程原[1,2] SUN Shi-Xiong;CHEN Ya-Jun;ZHANG Ming-Hui;ZHAO Ben-Bo;DENG Ping;CHENG Yuan(School of Chemical Engineering and Technology,North University of China,Taiyuan 030051,China;School of Dezhou Graduate,North University of China,Dezhou 253034,China)

机构地区：[1]中北大学化学工程与技术学院,太原030051 [2]中北大学德州研究分院,德州253034

出　　处：《四川大学学报（自然科学版）》2022年第4期133-139,共7页Journal of Sichuan University(Natural Science Edition)

基　　金：山西省高等学校科技创新项目(2020L0322)。

摘　　要：为克服当前水性环氧乳液的环氧基团含量和固含量低导致的涂料和涂膜性能差的缺点,本文从分子结构设计的角度出发,首先以聚乙二醇400(PEG400)为软段,制备了非离子型水性环氧(WEP)乳液;然后以侧基亲水扩链剂(Ymer N120)对其进行改性,合成了改性非离子型水性环氧(YWEP)乳液,研究了Ymer N120的用量对YWEP乳液和涂膜性能的影响.结果表明,WEP乳液的环氧基团含量(以环氧值表示)最高可达0.36,引入侧基亲水基团后YWEP乳液可在保持较高环氧值的条件下进一步将固含量由30%提高至52%,提高了73.3%.固化后涂膜的拉伸强度由57.3 MPa增大至64.8 MPa.腐蚀电流密度由7.97×10^(-8) mA·cm^(-2)减小至9.99×10^(-9) mA·cm^(-2).综上所述,亲水基团由主链转移至侧基后可有效提高水性环氧乳液、涂料和涂膜的性能.In order to overcome the disadvantage of low content of epoxy group and solid in current waterborne epoxy(WEP)emulsion,polyethylene glycol 400(PEG400)was used as soft section to prepare non-ionic WEP emulsion firstly.Then,the modified non-ionic waterborne epoxy(YWEP)emulsion was synthesized with the side hydrophilic chain extender(Ymer N120).The effects of the dosage of Ymer N120 on the properties of YWEP emulsion and paint film were studied.The results showed that the epoxy group content(represented by epoxy value)of WEP emulsion could be increased as high as 0.36,and the solid content of YWEP emulsion increased by 73.3%from 30%to 52%while maintaining the high expoxy value.After curing9 the tensile strength of the film increases from 57.3 MPa to 64.8 MPa.The corrosion current density decreased from 7.97×10^(-8) mA·cm^(-2) to 9.99×10^(-9) mA·cm^(-2).In conclusion,the transfer of hydrophilic groups from the main chain to the side group can effectively improve the properties of waterborne epoxy emulsions>coatings and coatings.

关 键 词：环氧乳液 侧基亲水扩链剂 非离子型 固含量 

分 类 号：O633.4[理学—高分子化学]