以水玻璃为硅源,采用常压干燥制备了SiO2气凝胶.研究了老化时间、老化剂种类、干燥溶剂种类以及表面改性对SiO2气凝胶结构和性能的影响.结果表明:制得的SiO2气凝胶具有良好的疏水性,密度为0.082g/cm3,孔隙率为96.26%,比表面积达到585.4m2/g.采用扫描电镜(SEM)、傅里叶变换红外分析(FT-IR)、热重分析(TG)、差热分析(DTA)等对疏水型气凝胶的结构和性能进行了研究.
参考文献
[1] | FRICKE J;EMMERLING A .Aerogels-recent progress in production techniques and novel applications[J].Solid-State Science and Technology,1998,13(1-3):299-303. |
[2] | Rao AV;Bhagat SD;Hirashima H;Pajonk GM .Synthesis of flexible silica aerogels using methyltrimethoxysilane (MTMS) precursor[J].Journal of Colloid and Interface Science,2006(1):279-285. |
[3] | Hrubesh LW. .Aerogel applications[J].Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites,1998(1):335-342. |
[4] | Pajonk GM. .Transparent silica aerogels[J].Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites,1998(1):307-314. |
[5] | Sung-Woo Hwang;Hae-Hyun Jung;Sang-Hoon Hyun .Effective preparation of crack-free silica aerogels via ambient drying[J].Journal of Sol-Gel Science and Technology,2007(2):139-146. |
[6] | Jyoti L Gurav;A. Venkateswara Rao;Uzma K.H. Bangi .Hydrophobic and low density silica aerogels dried at ambient pressure using TEOS precursor[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2009(1/2):296-302. |
[7] | WANG L J;ZHAO S Y;YANG M .Structural characteristics and thermal conductivity of ambient pressure dried silica aerogels with one-step solvent exchange/surface modification[J].Materials Chemistry and Physics,2009,113(01):485-490. |
[8] | 张秀华,赵海雷,何方,李雪,仇卫华,吴卫江,曲选辉.SiO2气凝胶的常压制备与表面改性[J].北京科技大学学报,2006(02):157-162. |
[9] | BAKOWIES D;KOLLMAN P A .Theoretical study of base-catalyzed amide hydrolysis:gas-and aqueous-phase hydrolysis of formamide[J].Journal of the American Chemical Society,1999,121(24):5712-5726. |
[10] | 沈军,王际超,倪星元,王博,王晓栋,张志华.以水玻璃为源常压制备高保温二氧化硅气凝胶[J].功能材料,2009(01):149-151,158. |
[11] | 倪文,梁涛,杨海龙,徐国强.以工业水玻璃为原料制备纳米孔SiO2气凝胶块体材料[J].河南化工,2007(01):22-24. |
[12] | Lee CJ.;Kim GS.;Hyun SH. .Synthesis of silica aerogels from waterglass via new modified ambient drying[J].Journal of Materials Science,2002(11):2237-2241. |
[13] | YOUNG-GEUN KWON;SE-YOUNG CHOI;EUL-SON KANG .Ambient-dried silica aerogel doped with TiO_(2) powder for thermal insulation[J].Journal of Materials Science,2000(24):6075-6079. |
[14] | MAH S K;CHUNG I J .Effects of dimethyldiethoxysilane addition on tetraethylorthosilicate sol-gel process[J].Journal of Non-Crystalline Solids,1995,183(03):252-259. |
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