活性改性剂合成及其对环氧胶黏剂力学与界面粘接性能的影响

doi:10.11896/cldb.22120199

材料导报

2024, Vol. 38

Issue (11): 22120199-8 https://doi.org/10.11896/cldb.22120199

高分子与聚合物基复合材料

活性改性剂合成及其对环氧胶黏剂力学与界面粘接性能的影响

元强^1,2, 王攒^1,2, 姚灏^1,2,*, 黄炬^1,2, 左胜浩^1,2, 黄海^2,3

1 中南大学土木工程学院,长沙 410075
2 高速铁路建造技术国家工程研究中心,长沙 410075
3 中铁四局安徽中铁工程材料科技有限公司,合肥 230041

Synthesis of Reactive Modifiers and Their Effects on the Mechanical and Interfacial Bonding Properties of Epoxy Adhesives

YUAN Qiang^1,2, WANG Zan^1,2, YAO Hao^1,2,*, HUANG Ju^1,2, ZUO Shenghao^1,2, HUANG Hai^2,3

1 School of Civil Engineering, Central South University, Changsha 410075, China
2 National Engineering Research Center of High-speed Railway Construction Technology, Changsha 410075, China
3 Anhui Engineering Material Technology Co., Ltd., of CTCE Group, Hefei 230041, China

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摘要综合考虑环氧胶黏剂的施工性能、力学性能及与砂浆界面的粘接性能,利用三羟甲基丙烷三缩水甘油醚(TMPGE)与1,4-丁二醇(BDO),通过控制反应物物质的量比以及反应时间制备了四种低环氧值兼具高羟基含量的预聚体(PPM)。通过¹H-NMR、盐酸-丙酮法及凝胶渗透色谱(GPC)对PPM进行了表征。进一步研究了PPM对改性环氧胶黏剂工作性能、固化力学性能、与水泥砂浆粘接强度以及表面性质的影响。结果显示:延长反应时间以及增加BDO用量使PPM的数均分子量更大、环氧值更低。四种PPM改性后,胶黏剂的放热峰值温度降低,可操作时间延长。同时,PPM使环氧固化物的延性显著增加。四种PPM改性后使环氧与水的接触角降低,固化物表面的极性组分升高。XPS分析表明,PPM使环氧固化物的羟基含量显著提高。最后,PPM使胶黏剂对湿砂浆基体的粘接强度提高了一倍以上。

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	元强
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	黄海

关键词: 环氧胶黏剂可操作时间裂缝修补灌浆料界面粘接

Abstract: Considering the workability, mechanical and bonding properties of epoxy adhesives, four prepolymers (PPM) with low epoxy value and high hydroxyl content were prepared using trimethylolpropane triglycidyl ether (TMPGE) and 1, 4-butanediol (BDO) by tuning the molar ratio and reaction time. The PPM was characterized by¹H-NMR, hydrochloric acid-acetone method, and gel permeation chromatography (GPC). The effect of PPM on the workability, mechanical, bonding properties and the surface properties of the modified epoxy adhesives was further investigated. The results showed that prolonging the reaction time and increasing the BDO amount resulted in larger molecular weight and lower epoxy value of the products. After PPM modification, the exothermic temperature of the adhesives was reduced, the operability time was increased, and the ductility of the cured epoxy was significantly increased. PPM modification also resulted in a lower contact angle and a higher polar component of the cured epoxy surface. XPS analysis showed that the PPM significantly increased the hydroxyl content of the cured epoxy. The bond strength of the adhesive to the wet mortar matrix increases more than double by PPM addition.

Key words: epoxy adhesives operability time crack repair grouting material interface bonding

发布日期: 2024-06-25

ZTFLH:

TU58+1.3

基金资助: 中国中铁股份有限公司科技研究开发计划项目(重大专项课题2020-专项-02);高速铁路建造技术国家工程实验室开放基金(HSR202013)

通讯作者: *姚灏,中南大学土木工程学院副教授、硕士研究生导师。2018年博士毕业于西北工业大学。主要从事工程维修与防护技术、混凝土化学外加剂、有机-无机复合材料等领域的研究工作。主持国家自然科学基金青年项目、国家重点研究计划子课题等8项,以第一或通信作者发表论文30余篇。yaohao@csu.edu.cn

作者简介: 元强,中南大学土木工程学院教授、博士研究生导师。国家自然科学基金委优秀青年基金、中国硅酸盐学会青年科技奖获得者。主持国家级、省部级、企业课题60余项,长期围绕高速铁路建造与养维关键水泥基材料、3D打印水泥基材料、新型结构材料、绿色低碳材料等领域开展研究,发表论文150余篇,出版英文专著/教材3部、中文专著/教材4部,应邀编写英文专著1章,申请/授权发明专利20余项。

引用本文:

元强, 王攒, 姚灏, 黄炬, 左胜浩, 黄海. 活性改性剂合成及其对环氧胶黏剂力学与界面粘接性能的影响[J]. 材料导报, 2024, 38(11): 22120199-8.
YUAN Qiang, WANG Zan, YAO Hao, HUANG Ju, ZUO Shenghao, HUANG Hai. Synthesis of Reactive Modifiers and Their Effects on the Mechanical and Interfacial Bonding Properties of Epoxy Adhesives. Materials Reports, 2024, 38(11): 22120199-8.

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http://www.mater-rep.com/CN/10.11896/cldb.22120199 或 http://www.mater-rep.com/CN/Y2024/V38/I11/22120199

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