气凝胶
材料科学
复合数
复合材料
热重分析
接触角
羟乙基纤维素
抗压强度
热导率
纤维素
傅里叶变换红外光谱
动态力学分析
明胶
化学工程
生物高聚物
聚合物
有机化学
化学
工程类
作者
Tangping Peng,Jundong Zhu,Tao Huang,Chongwen Jiang,Zhao Fu-xing,Shengzhuo Ge,Le Xie
摘要
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.
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