Elastic silicon dioxide/phenolic resin aerogel protective material and preparation method thereof

• Main Authors: WANG LEI, WANG XIN, HU XIMIAO, LI HAIFENG
• Format: Patent
• Language: Chinese; English
• Published: 24.11.2023
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

The invention provides a preparation method of an elastic silicon dioxide/phenolic resin aerogel protective material, which comprises the following steps: taking cheap industrial tetraethoxysilane as a silicon source, mixing with deionized water, a phenolic compound and an aldehyde compound, and utilizing a sol-gel method and a normal pressure drying technology to obtain a silicon dioxide/phenolic resin composite aerogel material. The preparation process is simple, and the preparation cost is low; the prepared silicon dioxide/phenolic resin composite aerogel has the characteristics of elasticity, compressibility, low density, thermal stability and good oxidation resistance. 本发明提供一种弹性二氧化硅/酚醛树脂气凝胶防护材料的制备方法，以廉价的工业正硅酸乙酯为硅源，与去离子水、酚类化合物、醛类化合物相混合，利用溶胶-凝胶法和常压干燥技术得到二氧化硅/酚醛树脂复合气凝胶材料。本发明制备工艺简单，制备成本低；所制备的二氧化硅/酚醛树脂复合气凝胶具有弹性可压缩、低密度、热稳定性和抗氧化性好的特点。