热解炭黑和碳纳米管对天然橡胶导电复合材料性能的影响,Journal of Applied Polymer Science

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热解炭黑和碳纳米管对天然橡胶导电复合材料性能的影响
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2022-03-10 , DOI: 10.1002/app.52321
Gang Yan ₁ , Deshang Han _{1,

2} , Wenchao Li ₁ , Jian Qiu ₁ , Chaojie Jiang ₁ , Li Li _{1,

2} , Chuansheng Wang _{1,

2}

Affiliation

导电性炭黑、石墨烯和碳纳米管 (CNT) 等具有优异导电性的碳基材料常用于制备导电聚合物复合材料。裂解炭黑作为废旧橡胶的回收材料，在某些领域可以替代其他炭黑，可以大大降低生产成本，促进废旧橡胶的再利用。本文将热解炭黑与碳纳米管混合，通过机械共混法添加到天然橡胶中，得到复合材料。研究了热解炭黑与CNT的协同作用、3D网络结构和导电网络的形成，并分析了复合材料的性能。结果表明，热解炭黑和碳纳米管协同作用形成的3D“葡萄簇”网络结构，导致复合材料的固化性能和力学性能得到改善，佩恩效应增加，分散性降低。填料，并显着降低复合材料的体积电阻率。随着碳纳米管含量的增加，复合材料的性能变化趋于稳定。一般来说，40份热解炭黑和4份碳纳米管混入橡胶基体时，复合材料的综合性能最好，体积电阻率为9.25E5。我们的研究结果为制备天然橡胶导电复合材料提供了新思路。通过添加高碳纳米管和廉价的热解炭黑，克服了单一填料易聚集的问题，比添加两种高导电填料更经济，与改良方案相比工艺更简单、更省时。需要做更多的研究来揭示热解炭黑在实际导电复合材料中的作用。

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Effect of pyrolysis carbon black and carbon nanotubes on properties of natural rubber conductive composites

Carbon based materials with excellent conductivity such as conductive carbon black, graphene, and carbon nanotubes (CNTs) are often used in the preparation of conductive polymer composites. Pyrolysis carbon black, as a recycled material of waste rubber, can be used as a substitute for other carbon black in some fields, which can greatly reduce the production cost and promote reuse of used rubber. In this article, pyrolysis carbon black is mixed with CNT and added to natural rubber by mechanical blending method to get the composite material. The synergistic effect of pyrolysis carbon black and CNT, 3D network structure and formation of conductive network are investigated, and the properties of composites are analyzed. The results show that the 3D “grape cluster” network structure formed by the synergistic action of the pyrolysis carbon black and CNT, which led to the improvement of the curing properties and mechanical properties of the composites, increase the Payne effect, decrease the dispersion of the filler, and significant reduction the volume resistivity of the composites. With the increasing of CNT content, the variation of the properties of the composites changed and stabilized. In general, when 40 phr pyrolysis carbon black and 4 phr CNT are mixed into rubber matrix, the composite has the best comprehensive performance, and the volume resistivity is 9.25E5. Our results provide new thoughts in preparing natural rubber conductive composites. By adding highly CNT and inexpensive pyrolysis carbon black, the problem of easy aggregation of a single filler is overcome, which is more economical than adding two highly conductive fillers, and the process is simpler and time-saving compared to the modified solution. More studies need to be done in order to reveal the effects of pyrolysis carbon black in practical conductive composites.

更新日期：2022-03-10

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