Premium
Facile preparation for gelatin/hydroxyethyl cellulose‐SiO 2 composite aerogel with good mechanical strength, heat insulation, and water resistance
Author(s) -
Peng Tangping,
Zhu Jundong,
Huang Tao,
Jiang Chongwen,
Zhao Fuxing,
Ge Shengzhuo,
Xie Le
Publication year - 2021
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.50539
Subject(s) - aerogel , materials science , composite number , thermogravimetric analysis , composite material , contact angle , hydroxyethyl cellulose , compressive strength , fourier transform infrared spectroscopy , dynamic mechanical analysis , thermal conductivity , gelatin , biopolymer , chemical engineering , cellulose , polymer , organic chemistry , chemistry , engineering
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‐SiO 2 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‐SiO 2 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 SiO 2 aerogel particles display a bright future in thermal insulation.