摘要
为改善形状记忆热塑性聚氨酯(SMTPU)的力学和形状记忆性能,通过熔融共混技术制备了氧化石墨烯/多壁碳纳米管复合填充改性的SMTPU复合材料,其中,氧化石墨烯首先用乙二胺进行接枝改性,多壁碳纳米管用硫酸/硝酸混合酸进行了处理。进一步研究了上述填料的加入对所得复合材料的力学性能、熔体流动速率及形状记忆性能的影响。结果表明,填料含量对复合材料的力学和形状记忆性能有明显的影响。固定氧化石墨烯与多壁碳纳米管的质量比为1,当它们在复合材料中的质量分数为0.5%时,复合材料的拉伸强度较纯SMTPU提高了25.2%。随着填料含量的增加,复合材料的熔体流动速率逐渐降低。形状记忆性能研究表明,加入氧化石墨烯/多壁碳纳米管使得复合材料的形状固定率先上升后下降,而且在氧化石墨烯/多壁碳纳米管的质量分数为0.5%时,复合材料形状固定率最大,较纯SMTPU提高了26.4%;形状回复率则随填料含量的增加逐渐上升,且回复温度越高,形状回复率越好。
To improve the mechanical and shape memory properties of shape memory thermoplastic polyurethane （SMTPU）, SMTPU composites were prepared through melt blending by adding graphene/ carbon nanotubes hybrid material. The effects of hybrid material on the mechanical properties, melt index and shape memory properties were investigated. The experimental results show that the content of the hybrid material has an obvious influence on the mechanical properties. When the filler content is 0. 5 %, the tensile strength of composite increases by 25.2 %. The melt index of the composite decreases with the increasing content of filler. Shape memory performance tests indicate that the shape fixed rate of the nanocomposite increases firstly, and then decreases with the addition of hybrid the shape fixed rate increases by 26.4% compared with that increases with the increasing of recovery ratio. filler content, and the higher the material. When the filler content is O. 5%, of pure SMTPU. The shape recovery ratio recovering temperature, the better the shape
出处
《塑料工业》
CAS
CSCD
北大核心
2016年第3期142-146,共5页
China Plastics Industry
基金
国家级大学生创新创业训练计划项目(201510623033)
特种材料及制备技术四川省高校重点实验室开放研究基金(szjj2015-084
szjj2015-086)
西华大学"青年学者培养计划"基金(01201404)
西华大学"西华杯"大学生创新基金(2015)
