本文以正硅酸乙酯为原料,经溶胶-凝胶过程制备二氧化硅醇凝胶,再利用二甲基二氯硅烷对醇凝胶进行化学表面修饰,最后用超临界干燥方法制备了疏水性二氧化硅气凝胶.运用红外光谱、BET、扫描电镜、X射线衍射等测试方法对制得样品的结构、形貌及化学组成进行了分析.结果表明该样品是表面存在疏水基团-CH3 的疏水性SiO2 气凝胶,是呈连续网络结构的球状纳米粒子,孔径分布主要集中在2～10 nm,是热稳定性较高的非晶、多孔、轻质介孔材料.
参考文献
| [1] | A. Soleimani Dorcheh;M. H. Abbasi .Silica aerogel; synthesis, properties and characterization[J].Journal of Materials Processing Technology,2008(1-3):10-26. |
| [2] | Rao AV.;Kulkarni MM.;Amalnerkar DP.;Seth T. .Surface chemical modification of silica aerogels using various alkyl-alkoxy/chloro silanes[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2003(1/4):262-270. |
| [3] | 黄娆,刘之景.新型低介电常数材料研究进展[J].微纳电子技术,2003(09):11-14,18. |
| [4] | Bellunato T.;Braem A.;Buzykaev AR.;Calvi M.;Chesi E.;Danilyuk AF. Easo S.;Hansen C.;Jolly S.;Joram C.;Kravchenko EA.;Liko D.;Matteuzzi C.;Musy M.;Negri P.;Neufeld N.;Onuchin AP.;Seguinot J.;Weilhammer P. Wotton S. .Aerogel as Cherenkov radiator for RICH detectors[J].Nuclear Instruments and Methods in Physics Research, Section A. Accelerators, Spectrometers, Detectors and Associated Equipment,2003(1):227-230. |
| [5] | 高秀霞,张伟娜,任敏,朱果逸.硅气凝胶的研究进展[J].长春理工大学学报（自然科学版）,2007(01):86-91. |
| [6] | A. Venkateswara Rao;S.D. Bhagat .Synthesis and physical properties of TEOS-based silica aerogels prepared by two step (acid-base) sol-gel process[J].Solid state sciences,2004(9):945-952. |
| [7] | Hoffmann H;Meyer M;Zeitler I .Control of morphology inside the mesoporous gelstructure in silica-gels[J].Colloids and Surfaces, A. Physicochemical and Engineering Aspects,2006(1/3):117-127. |
| [8] | Leventis N;Mulik S;Wang XJ;Dass A;Patil VU;Sotiriou-Leventis C;Lu HB;Chum G;Capecelatro A .Polymer nano-encapsulation of templated mesoporous silica monoliths with improved mechanical properties[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,2008(2/9):632-644. |
| [9] | Aji A. Anappara;S. Rajeshkumar;P. Mukundan .Impedance spectroscopic studies of sol-gel derived subcritically dried silica aerogels[J].Acta materialia,2004(2):369-375. |
| [10] | 陈姚,于欣伟,钟智欣,胡家聪,谭英立.新型疏水沉淀二氧化硅的制备[J].无机盐工业,2005(02):18-20. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%