Facile preparation for gelatin/hydroxyethyl cellulose‐SiO2 composite aerogel with good mechanical strength, heat insulation, and water resistance. Issue 23 (3rd February 2021)

• Record Type: Journal Article
• Authors: Peng, Tangping; Zhu, Jundong; Huang, Tao; Jiang, Chongwen; Zhao, Fuxing; Ge, Shengzhuo; Xie, Le
• Is Part Of: Journal of applied polymer science. Volume 138:Issue 23(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-02-03
• Subjects: aerogel -- biopolymer composites -- hydrophobicity -- mechanical properties -- thermal properties; Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.50539
• Languages: English
• ISSNs: 0021-8995

Abstract

Abstract: The advanced thermal insulation materials with low cost and high mechanical properties play an important role in transport packaging and thermal protection fields. An inorganic/organic composite aerogel was prepared through hydrogen bonds and chemical crosslinking among silica aerogel particles, gelatin (GA), and hydroxyethyl cellulose (HEC). The as‐prepared GA/HEC‐SiO2 composite aerogels were characterized by compression tests, scanning electron microscopy, Fourier transform infrared, thermogravimetric analyzer, and contact angle tests to investigate the chemical composition and physical structure. The GA/HEC‐SiO2 composite aerogels exhibited a strong mechanical strength (0.53–4.01 MPa), a high compression modulus (1.33–11.52 MPa), a lower volume density (0.035–0.081 g/cm 3 ), thermal conductivity as low as 0.035 W/[m K]), a porosity of more than 93%, and hydrophobic angle as high as 150.01° after hydrophobic modification. These results indicate that biopolymer composite aerogels embedded with SiO2 aerogel particles display a bright future in thermal insulation. Abstract :