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- Title
Preparation of robust and light‐weight anisotropic polyimide/graphene composite aerogels for strain sensors.
- Authors
Zheng, Shuai; Jiang, Lei; Chang, Fan; Zhang, Changqi; Ma, Ning; Liu, Xueqiang
- Abstract
This study reports the fabrication of a serious of anisotropic composite aerogels comprising polyimide and graphene (PI/G) through a simple and eco‐friendly technique. Poly(amic acid) ammonium salt/graphene dispersion, which was produced through the mixture of poly(amic acid), graphene aqueous dispersion, triethylamine, and water, was utilized in the process of creating PI/G composite aerogels employing unidirectional freezing, freeze‐drying, and thermal imidization. The PI/G aerogels displayed anisotropic mechanical properties, thermal insulation, and electrical conductivity. The PI/G aerogels with an anisotropic microstructure demonstrated notable rigidity and a high compressive modulus (52.7 MPa) along the axial direction, while displaying favorable flexibility and a low modulus (18.2 MPa) along the radial direction. Furthermore, the PI/G aerogel exhibited anisotropic thermal conductivity (axial: 64 mW m−1 K−1; radical: 55 mW m−1 K−1). These properties enable the PI/G aerogel to have a wider range of potential applications, especially strain sensors. The research presented herein establishes a simple and eco‐friendly strategy for the production of anisotropic PI/G‐based composite aerogels.
- Subjects
STRAIN sensors; AEROGELS; GRAPHENE; POLYIMIDES; AMIC acids; THERMAL insulation
- Publication
Polymers for Advanced Technologies, 2024, Vol 35, Issue 1, p1
- ISSN
1042-7147
- Publication type
Article
- DOI
10.1002/pat.6231