%0 Journal Article
%T 纳米SiO2功能化改性石墨烯/热塑性聚氨酯复合材料的制备与性能<br>Preparation and properties of nano SiO2 functionally modified graphene/thermoplastic polyurethane composites
%A 周醒
%A 夏元梦
%A 蔺海兰
%A 王正君
%A 肖文强
%A 卞军
%A 赵新为
%J 复合材料学报
%D 2017
%R 10.13801/j.cnki.fhclxb.20161208.003
%X 采用Hummers法制备了氧化石墨烯（Graphene Oxide，GO），再与经硅烷偶联剂（APTES）偶联改性纳米SiO2所得的产物（nano SiO2-NH2）混合，制备了石墨烯片（Graphene Sheets，GS）接枝纳米SiO2杂化材料（nano SiO2-g-GS）。以nano SiO2-g-GS为填料，热塑性聚氨酯（TPU）为基体，通过熔融共混法制备共混型nano SiO2-g-GS/TPU复合材料，并对填料和复合材料进行测试和表征。拉伸测试显示nano SiO2-g-GS的加入对基体TPU有一定的补强作用，使复合材料定伸应力（300%、500%和1 000%）增大。DSC测试显示，与纯TPU相比，nano SiO2-g-GS/TPU复合材料的结晶温度有大幅升高，填料含量为1wt%时，TPU的结晶温度升高了44℃。形状记忆测试结果显示，随nano SiO2-g-GS含量增加，nano SiO2-g-GS/TPU复合材料的形状回复率（Rr）逐渐降低，但形状固定率（Rf）逐渐升高。当nano SiO2-g-GS质量分数为1wt%时，nano SiO2-g-GS/TPU复合材料性能最佳。 The graphene oxide (GO) synthesized by Hummers' method was mixed into coupled product nano SiO2-NH2 obtained by silane coupling agent (APTES) modifying nano SiO2 to prepare nano SiO2 functionally modified graphene sheet composites (nano SiO2-g-GS) through the graphene sheets grafting with nano SiO2. The nano SiO2 functionally modified graphene/thermoplastic polyurethane composites (nano SiO2-g-GS/TPU) were fabricated by melt compounding method using the thermoplastic polyurethane (TPU) as the matrix and nano SiO2-g-GS as the filler, and then the fillers and composites were systematically characterized. The tensile tests show that the stress at definite elongation (300%, 500%, 1 000%) of nano SiO2-g-GS/TPU composites increases due to nano SiO2-g-GS has strengthening effects on the TPU. DSC tests show that the crystallinity temperature of the nano SiO2-g-GS/TPU composites increases significantly compared with pure TPU, and the crystallinity temperature of TPU with 1wt% mass fraction of nano SiO2-g-GS increases by 44℃. The shape memory testing results show that the shape recovery ratio (Rr) of nano SiO2-g-GS/TPU decreases and the shape fixing ratio (Rf) increases with the increase of the mass fraction of nano SiO2-g-GS. The nano SiO2-g-GS/TPU composites with 1 wt% nano SiO2-g-GS exhibit the best performance. 四川省教育厅青年基金（17ZB0422）；西华大学"青年学者培养计划"基金（01201404）；国家级大学生创新创业训练计划（201510623033）；四川省高校重点实验室开放研究基金（szjj2015-084；szjj2015-086）
%K 热塑性聚氨酯
%K 功能化石墨烯
%K 复合材料
%K 形状记忆性能
%K 熔融共混&lt
%K br&gt
%K thermoplastic polyurethane
%K functionalized graphene
%K composites
%K shape memory
%K melt mixing
%U http://fhclxb.buaa.edu.cn/CN/abstract/abstract13599.shtml