摘要
采用原位法制备不同含量还原氧化石墨烯(r GO)/环氧树脂(EP)复合材料。研究r GO含量对r GO/EP复合材料力学性能和形状记忆性能的影响。结果表明,通过溶剂热还原,填充到环氧树脂单体中的GO原位还原成r GO,并可均匀分散在EP基体中。该复合材料的拉伸强度、弹性模量和储能模量均随r GO含量增加呈先升后降态势,在w(r GO)=0.2%(相对于环氧树脂的质量而言)时相对最大;随着r GO含量增加,复合材料的玻璃化转变温度随之增加。当w(r GO)=0.6%时,玻璃化转变温度Tg相对纯环氧树脂提高约45℃,达到102℃,热稳定性显著提高。相应的复合材料具有良好的形状记忆性能,变形可以完全恢复,且r GO/EP复合材料相对纯环氧树脂具有更高的形状固定率与形状恢复温度。
Novel shape memory composites based on reduced graphene oxide (rGO)-reinforced epoxy resin (EP) composites were prepared by a solution mixing and solvothermal reduction method. The effect of rGO content on the mechanical and shape memory properties of the rGO/EP composites was investigated. Results showed that the GO uniformly dispersed in the EP matrix was reduced in-situ to rGO by the solvothermal reduction. The composite had the maximum tensile strength and modulus when the mass fraction of, rGO was 0.2%. When the mass fraction of rGO was 0.6%, the glass transition temperature ( Tg ) of the composite was 102 ℃, 45 ℃ higher than that of pure EP, and the corresponding composite has a good shape memory property with its deform- ation fully recovered.
出处
《新型炭材料》
SCIE
EI
CAS
CSCD
北大核心
2015年第5期404-411,共8页
New Carbon Materials
基金
国家自然科学基金(11202006)~~
关键词
还原氧化石墨烯
环氧树脂
原位制备
力学性能
形状记忆
Reduced graphene oxide
Epoxy resin
In-situ preparation
Mechanical property
Shape memory property