摘要
为研究不同类型、长径比的碳纳米管(CNTs)对PDMS基柔性材料电学与力学性能的影响,采用溶液共混法制备多壁羧基化长碳纳米管(L-CNTs)、多壁羧基化短碳纳米管(S-CNTs)、超高纯单壁碳纳米管(US-CNTs)与聚二甲基硅氧烷硅橡胶(PDMS)系列柔性复合材料,并对其力学、电学性能进行研究。结果表明,单掺情况下,与US-CNTS-PDMS-01表面、体积电阻率相比,当US-CNTs的掺入量达到5%时,柔性材料的表面、体积电阻分别降低了3、5个数量级。当S-CNTs掺入量为1%时,柔性材料模量增大至4.89 MPa,与纯PDMS相比,增幅达到17.5%。复掺情况下,当PDMS基体中CNTs总掺入为5%,S-CNTs与L-CNTs掺入比为2:3或者3:2时,柔性材料的表面、体积电阻率较小,电学性能最优。对力学性能而言,复掺体系中含有S-CNTs的样品模量增强较显著,含有US-CNTs的复掺柔性材料具有较好的断裂伸长率。
In order to analyze the different aspect ratio and types carbon nanotubes on the mechanical,electrical properties of the Polydimethylsiloxane(PDMS)serial composite,long multiwalled carbon Nanotubes(L-CNTs)、short multiwalled carbon nanotubes(S-CNTs)、high purified carboxylic carbon nanotubes(US-CNTs)and PDMS serial composite were prepared by solution blending method,respectively.In the case of individually incorporating,incorporation of 5%US-CNTs into PDMS matrix was helpful to enhance the electrical properties.The volume resistance and surface resistance were decreased 3,5 orders of magnitude as compared with US-CNTS-PDMS-01.The composite within 1%S-CNTs showed the best Young's modulus 4.89 MPa,17%increase compared to the pure PDMS.In the case of two components,incorporation of 5%L-CNTs and S-CNTs into PDMS matrix was helpful to enhance the electrical properties and Young's modulus.When the ratio of L-CNTs:S-CNTs was about 2:3 or 3:2,the volume resistance and surface resistance of the samples were decreased to the minimu,exhibiting optimal electrical performance.S-CNTs showed the obvious effect on the Young's modulus of PDMS matrix composite,US-CNTs showed the visible effect on the elongation at break of the PDMS matrix composite as well.
作者
花蕾
HUA Lei(Jiaxing City Key Laboratory of Civil and Environmental High Performance Functional Materials,Tongji Zhejiang College,Jiaxing,Zhejiang 314051,China;Department of Civil Engineering,Tongji Zhejiang College,Jiaxing,Zhejiang 314051,China)
出处
《塑料》
北大核心
2025年第3期1-6,11,共7页
Plastics
基金
浙江省自然科学基金(LGF21E030001)
嘉兴市科技计划(2021AY10076)。
