复合微胶囊填充型环氧树脂自修复复合材料的老化性能  

Aging Properties of Microcapsule-Filled Epoxy Resin Self-Healing Composites

作　　者：万里鹰[1] 肖春平[1] 肖洋 晏文康 藏辉 林连镔 刘婷 Liying Wan;Chunping Xiao;Yang Xiao;Wenkang Yan;Hui Zang;Lianbing Lin;Ting Liu(School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang 330063,China;Shanghai Institute of Aerospace Systems Engineering,Shanghai 201109,China;Shanghai Aerospace Equipment Manufacturing Co.,Ltd,Shanghai 200245,China)

机构地区：[1]南昌航空大学材料学院,江西南昌330063 [2]上海宇航系统工程研究所,上海201109 [3]上海航天设备制造总厂有限公司,上海200245

出　　处：《高分子材料科学与工程》2020年第3期133-139,共7页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(51463016);上海航天科技创新基金项目(SAST2016053)。

摘　　要：采用浇注成型法制备新型环氧树脂-脲醛树脂@2-甲基咪唑复合微胶囊(E-51-UF@2-MI复合微胶囊)/环氧树脂自修复复合材料,研究湿热老化(65℃去离子水)、化学腐蚀(40%硫酸溶液、40%氢氧化钠溶液)、395nm紫外线老化对新型自修复复合材料拉伸强度、弯曲强度和自修复性能的影响。结果表明,新型自修复复合材料在65℃去离子水中浸泡8h后,吸湿率达到稳定状态,最大吸湿率为0.15%;在40%硫酸溶液中浸泡4d,拉伸强度和弯曲强度最小损失率分别为25.7%和21.6%;在40%氢氧化钠溶液中浸泡5d,拉伸强度和弯曲强度最小损失率分别为22.5%和19.8%;经紫外线老化4d,拉伸强度和弯曲强度最小损失率分别为26.1%和46.1%;在40%硫酸溶液和395nm紫外线老化条件下,修复率呈现下降趋势,而在40%氢氧化钠溶液腐蚀条件下,其修复率先略有上升后不断下降。自修复性能下降原因在于:基体老化、微胶囊老化,以及微胶囊与基体的脱离。Few researches on aging properties of self-healing composites filled with microcapsules have been made.The new composites of epoxy resin-urea-formaldehyde resin@2-methylimidazole composite microcapsules(E-51-UF@2-MI composite microcapsules)/epoxy resin self-healing composites by casting method were prepared.The effects of hydrothermal aging(deionized water at 65℃),chemical corrosion(40% sulfuric acid solution,40%sodium hydroxide solution),or ultraviolet aging at 395nm on the tensile strength,flexural strength and self-healing properties of new self-healing composites were studied.The results show that the moisture absorption ratio of the new self-healing composites reaches a stable state after being immersed in deionized water at 65℃ for 8h,and the maximum moisture absorption ratio is 0.15%,indicating that the materials have good water resistance;the new self-healing composites were immersed in 40% sulfuric acid solution for 4d,and the tensile strength and bending strength reach the minimum loss ratios of 25.7% and 21.6%,respectively;the new self-healing composites were immersed in 40% sodium hydroxide solution for 5d,and the tensile strength and bending strength reach the minimum loss ratios,which are 22.5% and 19.8%,respectively;the new self-healing composites were irradiated with ultraviolet light for 4d,and the tensile strength and bending strength reach the minimum loss ratios of 26.1% and 46.1%,respectively;under 40%sulfuric acid solution corrosion and 395nm ultraviolet aging conditions,the selfhealing ratios of the new self-healing composites show a downward trend,while under 40% sodium hydroxide solution corrosion condition,the self-healing ratios increase slightly at first and then decrease continuously.

关 键 词：湿热老化 化学腐蚀 紫外线老化 复合微胶囊 自修复性能 

分 类 号：TB332[一般工业技术—材料科学与工程]