Doping, directional densification-stretching to reconstruct high performance CNT composite yarns for stretchable conductors

被引：6

作者：

Wei, Xiaoxiao ^{[1
,2
]}

Chen, Wei ^{[1
,2
]}

Ma, Huan ^{[1
,2
]}

Yang, Xiaori ^{[1
,2
]}

Liu, Wei ^{[3
]}

Zhang, Zhihan ^{[2
]}

Xu, Fujun ^{[1
,2
]}

机构：

[1] Donghua Univ, Shanghai Frontier Sci Res Ctr Modern Text, Shanghai 201620, Peoples R China

[2] Donghua Univ, Coll Text, Shanghai 201620, Peoples R China

[3] Shanghai Univ Engn Sci, Coll Fash Technol, Shanghai 201620, Peoples R China

来源：

COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2023年 / 173卷

关键词：

A; Yarn; B. Electrical properties; B. Mechanical properties; A. Smart materials; CARBON NANOTUBE FIBERS; ELECTRICAL-CONDUCTIVITY; HIGH-STRENGTH;

D O I：

10.1016/j.compositesa.2023.107696

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Carbon nanotube yarns (CNTY) have the potential to serve as continuous reinforcement in functional-structural composite materials; however, there exists the insulation problem (or poor conductivity) of polymers that has hampered the development of CNT/polymer-based composite electronic devices. Herein, a strategy is proposed to develop CNT/polymer-based composite yarn with excellent electrical and mechanical properties by doping polyethyleneimine (PEI) polymer and then directional densification-stretching. The PEI polymer was wellinfiltrated into intra- and inner CNT bundles to construct a consecutively conductive pathway, endowing an ultra-robust tensile strength (similar to 1207 MPa) and highly electrical conductivity (2.1 x 10(3) S cm(-1) ) of composite yarn. The resulting CNT/PEI CYs also exhibit integrated performances of superior mechanical damping, antiabrasive ability, extreme environment stability, and electrothermal properties. Additionally, they can act as stretchable conductors to maintain electrical stability during large-strain (100%) cyclic stretching. This engineering strategy provides novel insights into the development of continuous CNT/polymer-based composites for structural and functional composite materials.

引用

页数：9