International Journal of Applied Science and Engineering
Published by Chaoyang University of Technology

Yeng-Fong Shih 1*, Wei-Cheng Hou 1, Chun-Wei Chang 1, Chien-Hsin Wu 2,3, Ru-Jong Jeng 2,3, Ying-Hsiao Chen 4

1 Department of Applied Chemistry, Chaoyang University of Technology, Taichung City 413310, Taiwan

2 Institute of Polymer Science and Engineering, National Taiwan University, Taipei, 106319, Taiwan

3 Advanced Research Center for Green Materials Science and Technology, National Taiwan University, Taipei, 106319, Taiwan

4 Department of Chemical Engineering, National United University, Miaoli, 360023, Taiwan

 

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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.


Keywords: Electrical activation, Nanographite, Phase change microcapsule, Shape memory.


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ARTICLE INFORMATION

Received: 2024-01-12
Revised: 2024-03-16
Accepted: 2024-04-08


Cite this article:

Shih, Y.F., Hou, W.C., Chang, C.W., Wu, C.H., Jeng, R.J., Chen, Y.H. 2024. Carbon nanotube/microcapsule/polyurethane nanocomposites for multi‐stimuli responsive shape memory polymers. International Journal of Applied Science and Engineering, 21, 2024018. https://doi.org/10.6703/IJASE.202409_21(4).005

  Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

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