以正硅酸乙酯、乙醇和去离子水为原料，采用溶胶-凝胶法制备了Si O 2溶胶；并以煤沥青为原料，采用自挥发发泡法制备了中间相沥青基泡沫炭。然后采用浸渍工艺将 Si O 2溶胶和中间相沥青基泡沫炭在常压下进行复合，制备了 Si O 2气凝胶/中间相沥青基泡沫炭复合隔热材料。利用 XRD、SEM、热导仪和万能试验机等设备分别研究了Si O 2气凝胶、中间相沥青基泡沫炭以及Si O 2气凝胶/中间相沥青基泡沫炭复合材料的结构和性能。结果表明，所制备的复合材料具有一定的力学性能，同时其隔热性能优于单一泡沫炭的隔热性能，有望成为一种新型的隔热材料。
Silica sol was synthetized via sol-gel method by TEOS and ethanol,while mesophase derived carbon foam was prepared via spontaneous foaming method from coal tar pitch as precursor.Then silica aerogel/me-sophase derived carbon foam composite was obtained by immersion process at ambient pressure.The silica aero-gel,mesophase derived carbon foam and silica aerogel/mesophase derived carbon foam composite were charac-terized by XRD,SEM,thermal-detector and universal testing machine.The results indicated that the aerogel/mesophase derived carbon foam composite showed good mechanical perfermance,and its thermal insulation property was better than single mesophase derived carbon foam.Potentially the silica aerogel/msophase derived carbon foam composite was expected to be applied as a novel thermal insulation material.
参考文献
| [1] | M. Reim;W. Koerner;J. Manara;S. Korder;M. Arduini-Schuster;H.-P. Ebert;J. Fricke .Silica aerogel granulate material for thermal insulation and daylighting[J].Solar Energy,2005(2):131-139. |
| [2] | Tabata, M.;Adachi, I.;Kawai, H.;Sumiyoshi, T.;Yokogawa, H..Hydrophobic silica aerogel production at KEK[J].Nuclear Instruments and Methods in Physics Research, Section A. Accelerators, Spectrometers, Detectors and Associated Equipment,2012:64-70. |
| [3] | Tao Xie;Ya-Ling He;Zi-Jun Hu .Theoretical study on thermal conductivities of silica aerogel composite insulating material[J].International Journal of Heat and Mass Transfer,2013(1/2):540-552. |
| [4] | Yang, X.;Sun, Y.;Shi, D.;Liu, J. .Experimental investigation on mechanical properties of a fiber-reinforced silica aerogel composite[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2011(13/14):4830-4836. |
| [5] | Yundan Liao;Huijun Wu;Yunfei Ding .Engineering thermal and mechanical properties of flexible fiber-reinforced aerogel composites[J].Journal of Sol-Gel Science and Technology,2012(3):445-456. |
| [6] | Obrey, K.A.D.;Wilson, K.V.;Loy, D.A. .Enhancing mechanical properties of 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,2011(19/20):3435-3441. |
| [7] | 倪星元,张志华,黄耀东,周斌,吴广明,沈军.纳米多孔SiO2气凝胶的常压制备及应用[J].功能材料,2004(z1):2761-2763. |
| [8] | Montserrat Calvo;Roberto Garcia;Sabino R. Moinelo .Carbon Foams from Different Coals[J].Energy & Fuels,2008(5):3376-3383. |
| [9] | Xing He;Zhihong Tang;Yufang Zhu;Junhe Yang .Fabrication of carbon foams with low thermal conductivity using the protein foaming method[J].Materials Letters,2013(Mar.1):55-57. |
| [10] | Lu, Y.;Li, Z.;Wang, P.;Yang, C. .Preparation of mesophase pitch-based carbon foams with supercritical toluene[J].Journal of Applied Polymer Science,2011(1):336-341. |
| [11] | 景磊,赵东林,刘辉,孙杰,谢卫刚,迟伟东,沈曾民.中间相沥青基活性泡沫炭的制备及其电化学性能研究[J].功能材料,2012(12):1556-1560. |
| [12] | Thomas Beechem;Khalid Lafdi .Novel high strength graphitic foams[J].Carbon: An International Journal Sponsored by the American Carbon Society,2006(8):1548-1559. |
| [13] | GB/T23561.4-2009.煤和岩石物理力学性质测定方法第4 部分:煤和岩石孔隙率计算方法[S]. |
| [14] | 姚先周,胡子君,房景臣,孙陈诚,张宏波.SiO2气凝胶制备条件正交优化设计及其热物性[J].宇航材料工艺,2009(01):32-34. |
| [15] | Gaosheng Wei;Yusong Liu;Xinxin Zhang;Fan Yu;Xiaoze Du .Thermal conductivities study on silica aerogel and its composite insulation materials[J].International Journal of Heat and Mass Transfer,2011(11/12):2355-2366. |
| [16] | Nicola Husing;Ulrich Schubert .Aerogels-airy materials: chemistry, structure, and properties[J].Angewandte Chemie International Edition,1998(1/2):22-45. |
| [17] | Sangwook Sihn;Sabyasachi Ganguli;David P. Anderson;Ajit K. Roy .Enhancement of through-thickness thermal conductivity of sandwich construction using carbon foam[J].Composites science and technology,2012(7):767-773. |
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