形状记忆环氧树脂自修复涂层制备及性能研究
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摘要
以E51环氧树脂为成膜物质,通过调整聚醚胺固化剂的比例和聚四亚甲基醚二醇增韧剂的比例,采用浇筑法制得条状样品,测试其形状回复率、回复时间和拉伸曲线,研究原料用量对环氧树脂涂层形状记忆能力和韧性的影响,从而得出具有最佳形状记忆效应的配比。实验结果表明:当环氧树脂固化程度为70%时,形状回复率最好,回复时间最短。以此配比为基础制备了环氧树脂涂层,研究了其电化学性能。当涂层表面划痕在120℃加热30 min后,划痕尺寸减小,涂层自腐蚀电位升高,涂层具有较好的自修复效果。
Different samples are prepared via molding method using epoxy E-51 as filmforming binder and adjusting the ratio of the curing agent polyether amine and thickening agent PTMEG. The shape-recovering rate,shape-recovering time and the tensile elongation of the samples are tested. The effect of raw materials formula on the shape memory and flexibility of the epoxy coating is examined to obtain the optimal formula. The result shows that the recovering rate and recovering time are the best when the curing degree of epoxy resin is 70%,wherein,the electrochemical performance of the epoxy coating is investigated. It is revealed that the size of the scratch on the coating gets smaller after heating for 30 minutes at 120 ℃,meanwhile,the corrosion potential rises,indicating a good self-healing performance.
Different samples are prepared via molding method using epoxy E-51 as filmforming binder and adjusting the ratio of the curing agent polyether amine and thickening agent PTMEG. The shape-recovering rate,shape-recovering time and the tensile elongation of the samples are tested. The effect of raw materials formula on the shape memory and flexibility of the epoxy coating is examined to obtain the optimal formula. The result shows that the recovering rate and recovering time are the best when the curing degree of epoxy resin is 70%,wherein,the electrochemical performance of the epoxy coating is investigated. It is revealed that the size of the scratch on the coating gets smaller after heating for 30 minutes at 120 ℃,meanwhile,the corrosion potential rises,indicating a good self-healing performance.
引文
[1]魏洪秋.具有自修复功能的形状记忆聚合物的制备及性能表征[D].哈尔滨:哈尔滨工业大学,2013.
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[10]LIN R,CHEN L W.Study on shape-memory behavior of polyether-based polyurethane,influence of the hardsegment content[J].Journal of Applied Polymer Science,1998,69(8):1563-1574.
[2]王斌赟.形状记忆环氧树脂制备及性能评价[D].北京:北京交通大学,2011.
[3]赖学平.形状记忆环氧树脂制备及性能研究[D].哈尔滨:哈尔滨工业大学,2007.
[4]LIU Y Y,HAN C H,TAN H F,et al.Thermal,mechanical and shape memory properties of shape memory epoxy resin[J].Materials Science and Engineering A,2010,527(10-11):2510-2514.
[5]WEI K,TANG Y,TIAN G,et al.Thermomechanical properties of shape-memory hydro-epoxy resin[J].Smart Materials&Structures,2012,21(5):55022-55029.
[6]XIAO X C,XIE T,CHENG Y T.Self-healable graphene polymer composites[J].Journal of Materials Chemistry.2010,20(17):3508-3514.
[7]ZHU G.Development and application of shape memory polymer[M].Tokyo:CMS Co Ltd,1989:1023-1027.
[8]HILD G,OKASHA R,MACRET M,et al.Relationship between elastic modulus and volume swelling degree of polymer networks swollen to equilibrium in good diluents,4.Interpretation of experimental results on the basis of scaling concepts[J].Macromolecular Chemistry&Physics,1986,187(9):2271-2288.
[9]XIONG X,ZHOU L,REN R.Thermal,mechanical properties and shape memory performance of a novel phthalidecontaining epoxy resins[J].Polymer,2018,140:326-333.
[10]LIN R,CHEN L W.Study on shape-memory behavior of polyether-based polyurethane,influence of the hardsegment content[J].Journal of Applied Polymer Science,1998,69(8):1563-1574.