磁、热双重响应的Fe3O4/EUG形状记忆复合材料的制备

Preparation of magnetic and thermal dual response shape memory Fe3O4 / EUG Composites

摘要:

将Fe3O4纳米粒子通过机械加工使其分散在杜仲胶（EUG）基体中，制备磁、热双响应形状记忆Fe3O4/EUG复合材料。探究Fe3O4纳米粒子含量与EUG硫化胶的升温速率、磁响应形状回复、Fe3O4纳米粒子的分散状态及力学性能之间的关系。结果表明，在添加Fe3O4纳米粒子超过30 phr后，Fe3O4在硫化EUG基体中有轻微团聚现象。Fe3O4具有补强作用，Fe3O4/EUG复合材料在高温（Tm+20 ℃）下力学性能均有提高，Fe3O4/EUG-50比EUG的拉伸强度提升了47%。经DMA测试，Fe3O4/EUG复合材料在三次循环下的固定率和回复率均在98%以上。Fe3O4/EUG复合材料在感应磁场中随着Fe3O4添加量增加样条温升速度提高，可实现快速无接触式加热，最短在12 s即可实现形状回复。

Abstract:

Fe3O4 nanoparticles were dispersed in eucommia ulmoides gum (EUG) matrix by mechanical machining to prepare magnetic and thermal dual response shape memory Fe3O4/EUG composites. The relationship between the content of Fe3O4 nanoparticles and the magnetic heating rate, response shape recovery, dispersion of Fe3O4 nanoparticles and mechanical properties of Fe3O4 nanoparticles were investigated. The results showed that Fe3O4 aggregated slightly in the EUG matrix when Fe3O4 nanoparticles are added over 30 phr. Fe3O4 has a reinforcing effect, and the mechanical properties of Fe3O4/EUG composites are improved at high temperature (Tm+20 ℃). The tensile strength of Fe3O4/EUG-50 is 47% higher than that of EUG. By DMA test, the fixation rate and recovery rate of Fe3O4/EUG composites were over 98% after three cycles. The Fe3O4/EUG composites could realize rapid non-contact heating with the increase of Fe3O4 addition in the induction magnetic field, and the shape recovery can be achieved within 12 s.