Journal
JOURNAL OF APPLIED POLYMER SCIENCE
Volume 138, Issue 23, Pages -Publisher
WILEY
DOI: 10.1002/app.50539
Keywords
aerogel; biopolymer composites; hydrophobicity; mechanical properties; thermal properties
Categories
Funding
- National Natural Science Foundation of China (CN) [21476267]
- Natural Science Foundation of Tianjin Municipal Science and Technology Commission (CN) [2018JJ2482]
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The GA/HEC-SiO2 composite aerogels prepared through hydrogen bonds and chemical crosslinking exhibit strong mechanical strength, high compression modulus, low volume density, and good thermal insulation performance, indicating a bright future in the thermal insulation field.
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 degrees after hydrophobic modification. These results indicate that biopolymer composite aerogels embedded with SiO2 aerogel particles display a bright future in thermal insulation.
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