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有机累托石/环氧树脂复合材料的结构及性能
作者:侯琳熙 刘燕 
单位:宁波大学材料科学与化学工程学院 浙江 宁波 315211 
关键词:环氧树脂 插层剥离 力学性能/耐热性能 离子液体-累托石 
分类号:TB383/TB33
出版年,卷(期):页码:2011,39(7):185-190
DOI:
摘要:

以热稳定性较高的离子液体1-十六烷基-3-甲基咪唑溴盐(1-hexadecyl-3-methylimidazolium bromide,C16mimBr)为改性剂,制备了有机累托石(organic-rectorite,OREC)。以环氧树脂(epoxy resin,EP)为基体,分别用2-乙基-4-甲基咪唑(2-ethyl-4-methylimidazole,2-E-4-MI)和桐油酸酐(tung oil anhydride,TOA)作固化剂,制得了2种有机累托石/环氧树脂复合材料。对复合材料的微观结构、力学性能和耐热性能进行了测试。结果表明:以2-E-4-MI为固化剂时,只能形成插层型纳米复合材料;以TOA为固化剂时,OREC在较低含量时易在环氧树脂基体中形成剥离型纳米复合材料。OREC添加量为2%(质量分数)时,剥离型纳米复合材料具有最佳力学性能和耐热性能。与纯环氧树脂固化物相比,其拉伸强度提高了60.3%,弯曲强度提高了26.7%,弯曲模量提高了34%,热分解温度提高了14 ℃,玻璃化转变温度提高了5.5 ℃。

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An organic-rectorite (OREC) was prepared with ionic liquid 1-hexadecyl-3-methylimidazolium bromide (C16mimBr). Two types of OREC/epoxy resin (EP) composites were obtained from the prepared OREC, with EP as a matrix, 2-ethyl-4- methylimidazole (2-E-4-MI) and tung oil anhydride (TOA) as curing agents, respectively. The microstructures, mechanical and thermal properties of the OREC/EP composites were characterized. The results indicate that the intercalated nanocomposite can be obtained when the curing agent 2-E-4-MI is added. The exfoliated nanocomposite can be obtained when the curing agent TOA is added at the OREC content of <2%(mass fraction, the same below). The OREC/EP nanocomposite with 2% of OREC showed the increased mechanical and thermal properties, compared to the neat system. The tensile strength was enhanced by 60.3%, the bending strength was increased by 26.7%, and the bending modulus was increased by 34%. The thermal decomposition temperature was increased by 14 ℃, and the glass transition temperature was increased by 5.5 ℃.

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基金项目:
2009年浙江省新苗人才计划、2009年宁波大学研究生科研创新基金及宁波大学王宽诚幸福基金资助项目。
作者简介:
博士,副教授
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参考文献:

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