Parallel carbon nanotube stripes in polymer thin film with tunable microstructures and anisotropic conductive properties
Parallel carbon nanotube stripes in polymer thin film with tunable microstructures and anisotropic conductive properties
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具有可调微结构和各向异性导电性能的聚合物薄膜中的平行碳纳米管条纹
DOI：
10.1016/j.compositesa.2014.11.023
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Tang Qingxin
中科院分区：
文献类型：
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作者：
Huang Jinrui;Zhu Yutian;Jiang Wei;Tang Qingxin
众所周知，剪切流可以诱导单元在受限的几何形状中组装成涡旋排列的条带结构。研究表明，通过调节分散相和连续相的粘度比，可以很好地调节聚合物薄膜中条纹的微观结构和性能。将十八胺官能化多壁碳纳米管（ODA-MWCNTs）与聚丙烯（PP）或聚（苯乙烯-乙烯/丁二烯-苯乙烯）（SEBS）在微混机中预混，制备了不同粘度比的PP/SEBS/ODA-MWCNTs复合材料。在剪切流动诱导下，不同粘度比的复合材料中ODA-MWCNT和SEBS均自发组装成涡旋取向的条纹状结构，导致薄膜具有导电各向异性。有趣的是，它被发现，无论是微观结构和多壁碳纳米管条纹在PP薄膜制备的复合材料具有不同的粘度比的电性能显着不同。
It is known that shear-flow can induce units to assemble into vorticity-aligned stripe-structures in confined geometries. This study shows that the microstructure and the property of the stripe in polymer thin film can be well tuned by adjusting the viscosity ratio between dispersed phase and continuous phase. Polypropylene (PP)/poly(styrene–ethylene/butadiene–styrene) (SEBS)/octadecylamine functionalized multiwalled carbon nanotubes (ODA-MWCNTs) composites with different viscosity ratios were prepared by either pre-compounding ODA-MWCNT into PP or SEBS in a microcompounder. Under the induction of shear-flow, ODA-MWCNT and SEBS spontaneously assembled into vorticity-aligned stripes in PP thin films for all the composites with different viscosity ratios, resulting in the property of conductive anisotropy for the film. Interestingly, it was found that both the microstructures and the electrical properties of MWCNT stripes in PP thin films prepared from the composites with different viscosity ratios were significantly different.