Carbon nanotube/microcapsule/polyurethane nanocomposites for multi‐stimuli responsive shape memory polymers
Journal
International Journal of Applied Science and Engineering
Journal Volume
21
Journal Issue
4
Start Page
1
End Page
18
ISSN
1727-2394
1727-7841
Date Issued
2024
Author(s)
Abstract
The aim of this research is to incorporate the nanographite particle (NGP) modified microencapsulated phase change material (GPCM) and carbon nanotube (CNT) into shape memory materials (SMMs). The GPCM with paraffin in the core and NGP in the shell possesses characteristics such as high thermal capacity, rapid heat absorption, and reduced electrical resistance. Moreover, the thermal storage effect of this GPCM may enhance the shape fixity and shape recovery of the SMMs. Additionally, CNTs with high aspect ratios and exceptional electrical and thermal conductivities can improve the mechanical strength and facilitate electrical or thermal activation of SMMs. After adding these GPCM and CNT to the polyurethane (PU), the thermal conductivity increased to 0.60 W/m.K, and the surface resistance decreased to 2.5 × 102 Ω/sq. Upon thermal activation, the shape fixity and shape recovery of these SMMs can reach 98% and 99%, respectively. In addition, it was observed that the material could form a complete circuit under an AC voltage of 100V and successfully achieve the shape recovery effect. This indicates that the addition of GPCM and CNT can enable the SMMs to achieve shape recovery effects through heat, light, and electrical activation.
Subjects
Electrical activation
Nanographite
Phase change microcapsule
Shape memory
SDGs
Publisher
Chaoyang University of Technology (IJASE)
Type
journal article