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首页> 外文期刊>Journal of Applied Polymer Science >Facile preparation for gelatin/hydroxyethyl cellulose-SiO2 composite aerogel with good mechanical strength, heat insulation, and water resistance
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Facile preparation for gelatin/hydroxyethyl cellulose-SiO2 composite aerogel with good mechanical strength, heat insulation, and water resistance

机译：胶凝素/羟乙基纤维素-SiO2复合气凝胶具有良好的机械强度，隔热和耐水性

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摘要

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.
机译：低成本、高机械性能的先进隔热材料在运输包装和热防护领域发挥着重要作用。通过硅胶颗粒、明胶（GA）和羟乙基纤维素（HEC）之间的氢键和化学交联，制备了无机/有机复合气凝胶。通过压缩试验、扫描电子显微镜、傅里叶变换红外光谱、热重分析仪和接触角测试对所制备的GA/HEC-SiO2复合气凝胶进行了表征，以研究其化学组成和物理结构。GA/HEC-SiO2复合气凝胶具有很强的机械强度（0.53-4.01mpa）、较高的压缩模量（1.33-11.52mpa）、较低的体积密度（0.035-0.081g/cm（3））、导热系数低至0.035w/[mk]）、孔隙率大于93%、疏水角高达150.01°。这些结果表明，嵌入SiO2气凝胶颗粒的生物聚合物复合气凝胶在隔热方面具有广阔的前景。

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