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首页> 外文期刊>Polymer Degradation and Stability >Dispersion of nano-carbon filled polyimide composites using self-degradated low molecular poly(amic acid) as impurity-free dispersant
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Dispersion of nano-carbon filled polyimide composites using self-degradated low molecular poly(amic acid) as impurity-free dispersant

机译：使用自降解低分子聚酰胺酸作为无杂质分散剂分散纳米碳填充的聚酰亚胺复合材料

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摘要

Polyimide (PI)-based composite films incorporated with carbon black (CB), carbon nanotube (CNT) and carbon nanofiber (CNF), respectively, were prepared using low-molecular-weight poly(amic acid) (PAA), a precursor of PI, as an impurity-free dispersant. High-energy ball mill was employed not only to downsize the nano-carbon agglomerates, but also to cut off the PAA chains for in-situ stabilizing the dispersion. Effect of the ball milling time, procedure, and filler species on the filler dispersion was investigated by means of electrical resistivity reproducibility, morphology observation, and mechanical testing. Comparing with direct dispersion of the nano-carbon in PAA, the composite films fabricated by a two-step approach, that is dispersion from the in-situ degradated low-molecular-weight PAA stabilized nano-carbon slurry, presented a uniform electrical conductivity with a lower percolation concentration and excellent reproducibility in the percolation region. A significant improvement in the Young's modulus for the CNT loaded PI film was achieved, which was much more effective than those filled with CB or CNF.
机译：使用低分子量的聚酰胺酸（PAA）制备聚酰亚胺（PI）基复合膜，分别掺入炭黑（CB），碳纳米管（CNT）和碳纳米纤维（CNF）。 PI，作为无杂质的分散剂。高能球磨机不仅用于减小纳米碳团聚物的尺寸，而且用于切断PAA链以原位稳定分散体。通过电阻率再现性，形态观察和机械测试，研究了球磨时间，步骤和填料种类对填料分散的影响。与将纳米碳直接分散在PAA中相比，通过两步法制备的复合膜（即从原位降解的低分子量PAA稳定的纳米碳浆料中分散）呈现出均一的电导率。较低的渗透浓度和优异的重现性。 CNT加载的PI膜的杨氏模量得到了显着改善，这比填充CB或CNF的杨氏模量要有效得多。

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  • 来源
    《Polymer Degradation and Stability》 |2010年第9期|p.1449-1455|共7页
  • 作者

    Guozhang Wu; rnYuchang Tang; rnRenxiu Weng;

  • 作者单位

    Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science & Engineering, East China University of Science & Technology, Shanghai 200237, PR China;

    rnShanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science & Engineering, East China University of Science & Technology, Shanghai 200237, PR China;

    rnShanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science & Engineering, East China University of Science & Technology, Shanghai 200237, PR China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    polyimide; conducitve polymer composites; dispersion; carbon nanotube;

    机译：聚酰亚胺有利于聚合物复合材料;分散;碳纳米管;

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