Tailored pyroresistive performance and flexibility by introducing a secondary thermoplastic elastomeric phase into graphene nanoplatelet (GNP) filled polymer composites for self-regulating heating devices

被引：34

作者：

Liu, Yi ^{[1
,2
]}

Zhang, Han ^{[1
,2
]}

Porwal, Harshit ^{[1
,2
]}

Tu, Wei ^{[2
]}

Wan, Kening ^{[1
]}

Evans, Jamie ^{[3
]}

Newton, Mark ^{[3
]}

Busfield, J. J. C. ^{[1
]}

Peijs, Ton ^{[1
,2
]}

Bilotti, Emiliano ^{[1
,2
]}

机构：

[1] Queen Mary Univ London, Sch Engn & Mat Sci, Mile End Rd, London E1 4NS, England

[2] Queen Mary Univ London, Nanoforce Technol Ltd, Joseph Priestley Bldg,Mile End Rd, London E1 4NS, England

[3] LMK Thermosafe Ltd, 9-10 Moonhall Business Pk,Helions Bumpstead Rd, Haverhill CB9 7AA, Suffolk, England

来源：

JOURNAL OF MATERIALS CHEMISTRY C | 2018年 / 6卷 / 11期

基金：

“创新英国”项目;

关键词：

POSITIVE TEMPERATURE-COEFFICIENT; CARBON-BLACK; ELECTRICAL-CONDUCTIVITY; SELECTIVE LOCALIZATION; MORPHOLOGICAL CONTROL; MECHANICAL-PROPERTIES; POLYSTYRENE BLENDS; FREE-ENERGY; POLYETHYLENE; NANOTUBES;

D O I：

10.1039/c7tc05621d

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Flexible and controllable self-regulating heating devices have great potential for use in applications such as healthcare devices, soft robotics, artificial skins and wearable electronics. Conventional self-regulating heating devices are often limited by the rigid nature of the polymer matrices, particularly at high conductive filler concentrations. In this paper, this limitation has been successfully tackled by using binary polymer blends that can achieve a desirable combination of mechanical, electrical and pyroresistive properties. The addition of a suitable secondary thermoplastic elastomeric polymeric phase did not only improve material flexibility, but did also tune the positive temperature coefficient (PTC) behaviour. For the first time, we systematically explore the effect of different blend morphologies as well as the selective localization of conductive fillers like graphene nanoplatelets (GNPs) on the overall mechanical and pyroresistive performance of self-regulating conductive polymer composites (CPCs). The effect of different blend morphologies was studied using different thermoplastic elastomers (TPEs) as secondary phases, and various blend compositions, into a GNP filled high density polyethylene (HDPE) nanocomposite. Blend morphologies included immiscible binary blends with a fine and coarse droplet morphology and a co-continuous morphology. In doing so, this study serves as a guideline for the selection of a secondary elastomeric phase in polymer blend based CPCs for optimised device flexibility and self-regulating heating functions.

引用

页码：2760 / 2768

页数：9