混凝土裂缝修复用改性环氧树脂的多目标优化  

Multi-objective Optimisation of Modified Epoxy Resin for Concrete Crack Repair

作　　者：陈自敏 冉志红 张艳 宋泽冈 袁博 CHEN Zimin;RAN Zhihong;ZHANG Yan;SONG Zegang;YUAN Bo(Faculty of Architecture and Planning,Yunnan University,Kunming 650091,China;Yunnan Institute of Highway Science and Technology,Kunming 650051,China)

机构地区：[1]云南大学建筑与规划学院,昆明650091 [2]云南省公路科学技术研究院,昆明650051

出　　处：《材料导报》2025年第10期248-256,共9页Materials Reports

基　　金：国家自然科学基金(51968074)。

摘　　要：混凝土裂缝修复用环氧树脂的力学性能决定着修复效果,为提高环氧树脂的力学性能,对其进行复合改性。选取改性纳米TiO_(2)、改性纳米SiO_(2)、羧基丁腈橡胶(CTBN)掺量作为自变量,以环氧树脂的拉伸强度、断裂伸长率、抗压强度为响应值,建立了环氧树脂力学性能的单目标预测模型,并确定了每个单目标的最佳配比。此外,还分析了各个因素之间的交互作用对复合改性环氧树脂性能的影响。采用灰色关联度分析法进行多目标优化,得出复合改性环氧树脂的最佳配比:改性纳米TiO_(2)用量为0.96%、改性纳米SiO_(2)用量为2.85%、CTBN用量为17.63%。通过实验验证,与预测值相比,最大拉伸强度、断裂伸长率和抗压强度的偏差分别为1.8%、1.2%和2.7%,表明回归模型的预测效果较好,并且多目标优化后材料的综合性能与冲击韧性明显提高。本工作可为改性环氧树脂配比设计提供一定的参考。The mechanical properties of epoxy resin for concrete crack repair determine the repair effect,and composite modification of epoxy resin is carried out to improve its mechanical properties.A single-objective prediction model for the mechanical properties of epoxy resins was established by selecting modified nano TiO_(2),modified nano SiO_(2),and carboxytetrabutadiene nitrile rubber(CTBN)doping as independent variables,and the tensile strength,elongation at break,and compressive strength of epoxy resins as the response values,and the optimal ratios of each single-objective were determined.In addition,the effects of the interaction between various factors on the properties of composite modified epoxy resin were analyzed.Gray correlation analysis was used for multi-objective optimization,and the optimal ratios of the composite modified epoxy resin were obtained:the amount of modified nano-TiO_(2)was 0.96%,the amount of modified nano-SiO_(2)was 2.85%,and the amount of CTBN was 17.63%,and it was experimentally verified that,compared with the predicted values,the deviations of the maximum tensile strength,the elongation at break and the compressive strength were 1.8%,1.2%and 2.7%,which indicates that the regression model has a better prediction effect,and the comprehensive performance and impact toughness of the material are significantly improved after multi-objective optimization.This work can provide some reference for the design of modified epoxy resin proportioning.

关 键 词：响应曲面法 灰色关联度分析法 改性环氧树 多目标优化 

分 类 号：TQ332.5[化学工程—橡胶工业]