SiO<sub>2</sub>气凝胶的常压干燥制备与性能表征

doi:10.11896/cldb.19040250

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Abstract In this dissertation, silica aerogels with super-hydrophobic were prepared via acid-base two-step modification, followed by atmospheric pressure drying process. They were synthesized with tetraethoxysilane (TEOS) as the silicon source, methyltriethoxysilane (MTES) as the precursor, ultrapure water (H₂O) as the reactant, ethanol (EtOH) as solvents, hydrochloric acid (HCl) and ammonia (NH₃·H₂O) as catalysts. N₂ adsorption-desorption test, FTIR, XRD, SEM and contact angle tests were used to characterize silica aerogels.The effect of the molar ratio of EtOH/TEOS,the molar ratio of H₂O/TEOS, the pH of the sol were systematically studied for aerogel performance influences.The results indicated that the aerogels prepared with n(TEOS)∶n(MTES)∶n(EtOH)∶n(H₂O)=1∶0.3∶14∶6 had the best properties. The thermal conductivity, specific surface area, average pore size, density, porosity, contact angle were 0.021 2 W/(m·K), 920 m²/g, 2—20 nm, 0.109 g/cm³, 95.05%, 158.7°, respectively.

Key words： silica aerogel ambient pressure drying superhydrophobic nanomaterials desorption

Published: 29 May 2020

CLC number:

TB303

Fund:This work was financially supported by the Key Research and Development Program of Shaanxi Province (2018SF-355), the Open Fund of State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Beilin District Science and Technology Plan Project (GX1804).

About author:: Qiuhui Yan, Professor, School of Building Equipment Science and Engineering, Xi'an University of Architecture and Technology. She graduated from Xi'an Jiaotong University in 2007 and received a doctorate in Enginee-ring. The main research interesting is the development and application of new high-performance insulation materials.
Weidong Xia, from September 2016 to June 2019, studied at Xi'an University of Architecture and Technology, mainly engaged in the research and development and application of new high-performance insulation materials.

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	YAN Qiuhui
	XIA Weidong
	LUO Jieren
	HUO Xin

Cite this article:

YAN Qiuhui,XIA Weidong,LUO Jieren, et al. Preparation and Characterization of Silica Aerogels by Ambient Pressure Drying[J]. Materials Reports, 2020, 34(12): 12173-12177.

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http://www.mater-rep.com/EN/10.11896/cldb.19040250 OR http://www.mater-rep.com/EN/Y2020/V34/I12/12173

1 Maleki H, Duraes L, Portugal A. Journal of Non-Crystalline Solids,2014,385(2),55.
2 Wu H J, Hu H Y, Chen Q L, et al. CIESC Journal,2015,66(10),4281(in Chinese).
吴会军,胡焕仪,陈奇良,等.化工学报,2015,66(10),4281.
3 Maleki H, Durafes L, Garcaa-gonzalez C A, et al. Advances in Colloid & Interface Science,2016,236,1.
4 Cuce E, Cuce P M, Wood C J, et al. Renewable & Sustainable Energy Reviews,2014,34(3),273.
5 Shu X, Liu C H, Ding Y D, et al. Materials Review A: Review Papers,2018,32(3),788(in Chinese).
舒心,刘朝辉,丁逸栋,等.材料导报:综述篇,2018,32(3),788.
6 Müller C A, Maciejewski M, Mallat T, et al. Journal of Catalysis,1999,184(1),280.
7 Huang S T, Suo H, Cui S, et al. Materials Review,2018,32(z1),10(in Chinese).
黄舜天,锁浩,崔升,等.材料导报,2018,32(z1),10.
8 Stergar J, Maver Uros. Journal of Sol-Gel Science and Technology,2016,77(3),738.
9 Smimova I, Suttiruengwong S, Arlt W. Journal of Non-Crystalline Solids,2004,350,54.
10 Kortesuo P, Ahola M, Karlsson S, et al. Journal of Biomedical Materials Research Part B Applied Biomaterials,2015,44(2),162.
11 Wang X B, Luan Z Q, Li K, et al. Materials Review A: Review Papers,2018,32(7),2214(in Chinese).
王馨博,栾志强,李凯,等.材料导报:综述篇,2018,32(7),2214.
12 Rao A V, Nilsen E, Einarsrud M A. Journal of Non-Crystalline Solids,2001,296(3),165.
13 Xiong L L, Liu C Y, Zhang Y, et al. Petrochemical Technology,2018,47(12),1332(in Chinese).
熊亮亮,刘春洋,张瑜,等.石油化工,2018,47(12),1332.
14 Zheng W Z, Chen Y, Yu X W, et al. Journal of Guangzhou University(Natural Science),2010,9(6),77(in Chinese).
郑文芝,陈姚,于欣伟,等.广州大学学报(自然科学版),2010,9(6),77.
15 Li Z. Study on reinforcing hydrophobic silica aerogels and their combustion performance. Ph.D. Thesis,University of Science and Technology of China,China,2017(in Chinese).
李治.增韧疏水性二氧化硅气凝胶制备及燃烧性能研究.博士学位论文,中国科学技术大学,2017.
16 Li K. The ambient pressure drying preparation and properties research of silica aerogels and their composites.Master's Thesis, University of Science and Technology of China, China,2018(in Chinese).
李可.二氧化硅气凝胶及其复合材料的常压干燥制备与性能研究.硕士学位论文,中国科学技术大学,2018.
17 Lermontov S A, Sipyagina N A, Malkova A N, et al. Microporous & Mesoporous Materials,2017,237,127.
18 Chen Y Z, Ou Z W, Liu C H. Bulletin of Silicate,2018(4),511(in Chinese).
陈宇卓,欧忠文,刘朝辉.硅酸盐学报,2018(4),511.
19 Zhao Yue,Li Yan,Zhang Rubing. Ceramics International,2018,44(17),21262.
20 Wu G Y. Synthesis and modofication on mechnism of silica aerogels by two-step modofication via ambient pressure drying. Ph.D. Thesis,Xiamen University,China,2011(in Chinese).
吴国友.二次改性常压制备SiO₂气凝胶及其改性机理.博士学位论文,厦门大学,2011.
21 Feng J, et al. Aerogel high efficiency insulation materials, Science Press, China,2016(in Chinese).
冯坚,等.气凝胶高效隔热材料,科学出版社,2016.
22 Duan Y Y, Lin J, Wang X D, et al. CIESC Journal,2012,63(S1),54(in Chinese).
段远源,林杰,王晓东,等.化工学报,2012,63(S1),54.
23 Brinker C J, Scherer G W. Sol-gel science,Academic Press,US,2004.
24 Venkateswara Rao A. Journal of Non-Crystalline Solids,2001,296(3),165.
25 Yao N, Cao S L, et al. Microporous & Mesoporous Materials,2009,117(3),570.
26 Chen H S, Sun Z Y, Shao J C. Bulletin of Silicate,2011,30(4),934(in Chinese).
陈和生,孙振亚,邵景昌.硅酸盐通报,2011,30(4),934.
27 Song S F, Hu D D, Shen S K, et al. Chemical Industry and Engineering Progress,2014,33(8),2101(in Chinese).
宋少飞,胡道道,沈淑坤,等.化工进展,2014,33(8),2101.
28 Wang J, Deng Z S, Shen J, et al. Journal of Non-Crystalline Solids,2000,271(1),100.
29 Mazrouei-Sebdani Z,Javazmi L,Khoddami A,et al. In:IOP Conference Series: Materials Science and Engineering. French,2017,pp.1.
30 Zhang X Y, Xu L H, Shen Y, et al. Journal of Functional Materials,2018,49(3),03118(in Chinese).
张旋宇,徐丽慧,沈勇,等.功能材料,2018,49(3),03118.
31 Liu H L, Deng Q Y, Zhu P. Journal of Materials Engineering,2018(2),22(in Chinese).
刘洪丽,邓青沂,褚鹏.材料工程,2018(2),22.