Preparation of flexible, hydrophobic, and oleophilic silica aerogels based on a methyltriethoxysilane precursor

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	Preparation of flexible, hydrophobic, and oleophilic silica aerogels based on a methyltriethoxysilane precursor
	Yu, Yuxi ; Wu, Xiaoyun ; Guo, Deqia ; Fang, Jiyu ; Yu YX(余煜玺)
刊名	http://dx.doi.org/10.1007/s10853-014-8480-0
	2014
关键词	Compression ratio (machinery) Ethanol Hydrophobicity Silica gel Sol-gels
英文摘要	We report the synthesis of flexible, hydrophobic, and oleophilic silica aerogels through a two-step acid-base sol-gel reaction followed by supercritical drying, in which methyltriethoxysilane (MTES) is used as a precursor, ethanol (EtOH) as a solvent, and hydrochloric acid (HCl) and ammonia (NH 3·H2O) as catalysts. At the optimal molar ratio of MTES:EtOH:H2O:HCl:NH3·H2O is 1:18:3.5:1.44 × 10-4:1.2, MTES-based silica aerogels show the minimum density of 0.046 g/cm3 and the maximum compression ratio of 80 % with 15.09 kPa stress. They are superhydrophobic with a water contact angle of 157° and thermally stable up to 350 °C. We also find that they show the excellent adsorption for ethanol with a ratio of 1400 %. ? 2014 Springer Science+Business Media New York.
语种	英语
出版者	Kluwer Academic Publishers
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/87498]
专题	材料学院－已发表论文
推荐引用方式 GB/T 7714	Yu, Yuxi,Wu, Xiaoyun,Guo, Deqia,et al. Preparation of flexible, hydrophobic, and oleophilic silica aerogels based on a methyltriethoxysilane precursor[J]. http://dx.doi.org/10.1007/s10853-014-8480-0,2014.
APA	Yu, Yuxi,Wu, Xiaoyun,Guo, Deqia,Fang, Jiyu,&余煜玺.(2014).Preparation of flexible, hydrophobic, and oleophilic silica aerogels based on a methyltriethoxysilane precursor.http://dx.doi.org/10.1007/s10853-014-8480-0.
MLA	Yu, Yuxi,et al."Preparation of flexible, hydrophobic, and oleophilic silica aerogels based on a methyltriethoxysilane precursor".http://dx.doi.org/10.1007/s10853-014-8480-0 (2014).