CAJ | 학술논문

以正硅酸乙酯为硅源,乙醇和水为溶剂,芳纶纤维为增强相,通过溶胶凝胶及常压干燥等步骤,实现了芳纶增韧SiO_2气凝胶复合材料的非超临界制备.采用扫描电镜、吸附-脱附等分析手段及热导率测试对所得气凝胶样品进行结构分析和性质表征.结果表明,调节反应体系的各反应参数可以获得具有不同外形、密度及热导率的复合材料;所得气凝胶平均孔径约为10～20 nm,比表面积可达1000 m~2/g,可望在隔热材料等领域得到应用.
이정규산을지위규원,을순화수위용제,방륜섬유위증강상,통과용효응효급상압간조등보취,실현료방륜증인SiO_2기응효복합재료적비초림계제비.채용소묘전경、흡부-탈부등분석수단급열도솔측시대소득기응효양품진행결구분석화성질표정.결과표명,조절반응체계적각반응삼수가이획득구유불동외형、밀도급열도솔적복합재료;소득기응효평균공경약위10～20 nm,비표면적가체1000 m~2/g,가망재격열재료등영역득도응용.
A high malleable silica aerogel composite was prepared by acid/base two step sol-gel process in alcohol-water mixed solvents with tetraethoxysilane (TEOS) as precursor, aramid fiber as reinforcement, followed by ambient-dried method. The microstructure and properties were characterized by FESEM, BET and so on. The results indicated that the composites with different density, contour and thermal conductivity can be prepared by changing the reaction parameters. The average pore size of aerogel is 10～20 nm, specific surface area is more than 1000 m~2/g, which is hopeful to be applied in heat insulation field.