4.5 Article

Highly sensitive large strain cellulose/multiwalled carbon nanotubes (MWCNTs)/thermoplastic polyurethane (TPU) nanocomposite foams: From design to performance evaluation

期刊

JOURNAL OF SUPERCRITICAL FLUIDS
卷 188, 期 -, 页码 -

出版社

ELSEVIER
DOI: 10.1016/j.supflu.2022.105653

关键词

TPU composite foams; Aerogel; ScCO2; Large strain; High sensitivity; Piezoresistive sensors

资金

  1. National Natural Science Foundation of China [52173046, 51803062]
  2. Natural Science Foundation of Zhejiang Province [LZ21E030002]
  3. Fundamental Research Funds for the Provincial Universities of Zhejiang [RF-A2020008]

向作者/读者索取更多资源

In this study, thermoplastic polyurethane was synthesized on the aerogel skeleton to obtain cellulose/multiwalled carbon nanotubes/thermoplastic polyurethane nanocomposite foams. These foams showed lightweight, high strength, and high sensitivity properties, with good repeatability of force-to-electricity conversion behavior under 50% strain.
Aerogel-based polymer composite foams are promising for large strain piezoresistive sensors, but their aerogel skeleton is partially destroyed during the foaming process, limiting their sensitivity. Herein, the thermoplastic polyurethane was synthesized on the aerogel skeleton to obtain cellulose/multiwalled carbon nanotubes (MWCNTs)/thermoplastic polyurethane (TPU) nanocomposite materials foamed with the aid of supercritical carbon dioxide (ScCO2). A series of lightweight, high strength, and high sensitivity nanocomposite foams were developed, possessing an average diameter of similar to 9.11 mu m and a cell density of 6.84 x 10(8) cells/cm(3). The mechanical properties, including compressive strength and compressive modulus, were promisingly 5.56 and 28.90 MPa, respectively. Under 50 % strain, apparent high repeatability of force-to-electricity conversion behavior was detected in 100 compression cycles.

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