采用原位法制备不同含量还原氧化石墨烯( rGO)/环氧树脂( EP)复合材料. 研究rGO含量对rGO/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rGO,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rGO含量增加呈先升后降态势,在w(rGO)=0. 2%(相对于环氧树脂的质量而言)时相对最大;随着rGO含量增加,复合材料的玻璃化转变温度随之增加. 当w( rGO)=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rGO/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.
参考文献
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%