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通过构建分级结构实现炭黑填充三元聚合物共混物的可调电导率

Tunable Electrical Conductivity of Carbon-Black-Filled Ternary Polymer Blends by Constructing a Hierarchical Structure.

作者信息

Zhang Qiyan, Zhang Bo-Yuan, Guo Zhao-Xia, Yu Jian

机构信息

Key Laboratory of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, China.

出版信息

Polymers (Basel). 2017 Aug 31;9(9):404. doi: 10.3390/polym9090404.

DOI:10.3390/polym9090404
PMID:30965708
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6418930/
Abstract

A type of hierarchical structured composite composed of a minor thermoplastic polyurethane (TPU) phase spreading at the interface of two major phases polyoxymethylene/polyamide copolymer (POM/COPA) and carbon black (CB) particles selectively localized at the TPU/COPA interface of the tri-continuous blends was fabricated by melt compounding. The hierarchical structure was designed according to predictions and verified by a combination of electron microscopy and solvent extraction technique. The hierarchical structured composites show the dramatically decreased percolation threshold, a reduction of 60% compared to those without TPU where CB is selectively distributed in the COPA phase. The effects of CB contents and TPU on the phase morphology of POM/COPA were investigated, showing the occurrence of the POM/COPA phase inversion from a sea-island to a co-continuous structure beyond the percolation threshold of CB in the presence of TPU. The mechanism for the formation of conductive network is construction of CB network at the TPU/COPA interface of tri-continuous POM/COPA/TPU blends and double percolation effect.

摘要

通过熔融共混制备了一种分层结构复合材料，该材料由在聚甲醛/聚酰胺共聚物（POM/COPA）两个主要相的界面处分散的少量热塑性聚氨酯（TPU）相和选择性地定位在三连续共混物的TPU/COPA界面处的炭黑（CB）颗粒组成。分层结构是根据预测设计的，并通过电子显微镜和溶剂萃取技术相结合进行了验证。与CB选择性分布在COPA相中且不含TPU的复合材料相比，分层结构复合材料的逾渗阈值显著降低，降低了60%。研究了CB含量和TPU对POM/COPA相形态的影响，结果表明在TPU存在的情况下，当CB超过逾渗阈值时，POM/COPA发生了从海岛结构到共连续结构的相转变。导电网络形成的机制是在三连续POM/COPA/TPU共混物的TPU/COPA界面处构建CB网络以及双逾渗效应。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/38b9/6418930/1bd59775033d/polymers-09-00404-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/38b9/6418930/05edc658979c/polymers-09-00404-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/38b9/6418930/69e0156333ee/polymers-09-00404-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/38b9/6418930/ce7ffd87dd33/polymers-09-00404-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/38b9/6418930/c7f439f92e24/polymers-09-00404-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/38b9/6418930/7ffac63f7c52/polymers-09-00404-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/38b9/6418930/8df9a094d21e/polymers-09-00404-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/38b9/6418930/1bd59775033d/polymers-09-00404-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/38b9/6418930/05edc658979c/polymers-09-00404-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/38b9/6418930/69e0156333ee/polymers-09-00404-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/38b9/6418930/ce7ffd87dd33/polymers-09-00404-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/38b9/6418930/c7f439f92e24/polymers-09-00404-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/38b9/6418930/7ffac63f7c52/polymers-09-00404-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/38b9/6418930/8df9a094d21e/polymers-09-00404-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/38b9/6418930/1bd59775033d/polymers-09-00404-g007.jpg

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本文引用的文献

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2
Styrene-butadiene-styrene copolymer compatibilized carbon black/polypropylene/polystyrene composites with tunable morphology, electrical conduction and rheological stabilities.具有可调形态、导电性能和流变稳定性的苯乙烯-丁二烯-苯乙烯共聚物增容炭黑/聚丙烯/聚苯乙烯复合材料。
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Incorporation of Carbon Nanofillers Tunes Mechanical and Electrical Percolation in PHBV:PLA Blends.碳纳米填料的加入调节了聚（3-羟基丁酸酯-co-3-羟基戊酸酯）：聚乳酸共混物的机械和电学渗流。
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