Superhydrophobic sodium silicate based silica aerogel prepared by ambient pressure drying

CORC > 厦门大学 > 材料学院－已发表论文

	Superhydrophobic sodium silicate based silica aerogel prepared by ambient pressure drying
	Shao, Zaidong ; Luo, Fengzuan ; Cheng, Xuan ; Zhang, Ying ; Cheng X(程璇) ; Zhang Y(张颖)
刊名	http://dx.doi.org/10.1016/j.matchemphys.2013.05.064
	2013
关键词	SOL-GEL PROCESS SURFACE MODIFICATION WATER-GLASS PHYSICAL-PROPERTIES PRECURSOR POWDERS HYDROGELS
英文摘要	Fujian Key Laboratory of Advanced Materials, China [2006L2003]; The superhydrophobic silica aerogel was prepared by using less expensive sodium silicate as a main silica source through a cost-effective and simple route via ambient pressure drying. The sodium impurity was first eliminated by mixing sodium silicate with a co-precursor methyltriethoxysilane (MTES) followed by ion exchange process. The hydrogel was formed by gelation and the alcogel was further obtained by alcoholization of the hydrogel. The surface of alcogel was modified by reacting with trimethylchlorosilane (TMCS) diluted in n-hexane. It was suggested that MTES accelerated water expelling from the hydrogel, while TMCS modified the surface of silica network by replacing Si-OH with Si-C. As a result, the obtained silica aerogel exhibited excellent physical properties with less than 10% volume shrinkage. The density, surface area and cumulative pore volume were 0.12 g cm(-3), 684.44 m(2) g(-1), and 3.55 cm(3) g(-1), respectively. The optical transmission reached 82.8% with the water contact angle of 146 degrees. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.
语种	英语
出版者	ELSEVIER SCIENCE SA
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/87260]
专题	材料学院－已发表论文
推荐引用方式 GB/T 7714	Shao, Zaidong,Luo, Fengzuan,Cheng, Xuan,et al. Superhydrophobic sodium silicate based silica aerogel prepared by ambient pressure drying[J]. http://dx.doi.org/10.1016/j.matchemphys.2013.05.064,2013.
APA	Shao, Zaidong,Luo, Fengzuan,Cheng, Xuan,Zhang, Ying,程璇,&张颖.(2013).Superhydrophobic sodium silicate based silica aerogel prepared by ambient pressure drying.http://dx.doi.org/10.1016/j.matchemphys.2013.05.064.
MLA	Shao, Zaidong,et al."Superhydrophobic sodium silicate based silica aerogel prepared by ambient pressure drying".http://dx.doi.org/10.1016/j.matchemphys.2013.05.064 (2013).