Pore structures of methyl-modified silica xerogels by small angle x-ray scattering

	Pore structures of methyl-modified silica xerogels by small angle x-ray scattering
	Xu, Y; Li, ZH; Fan, WH; Wu, D; Sun, YH; Wang, J; Dong, BZ; Wang J(王俊); Dong BZ(董宝中)
刊名	ACTA PHYSICA SINICA
	2003
卷号	52 期号:3 页码:635-640
关键词	small angle x-ray scattering methyl-modified silica xerogel pore structure
其他题名	小角x 射线散射方法研究甲基改性氧化硅干凝胶的孔结构
通讯作者	Chinese Acad Sci, Shanxi Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Peoples R China ; Chinese Acad Sci, Inst High Energy Phys, Natl Synchrotron Radiat Lab, Beijing 100039, Peoples R China
英文摘要	Two kinds of methyl-modified silica xerogels were prepared by mixing SiO2 colloidal suspension deriving from basic-catalyzed hydrolysis of TEOS (tetraethoxysilane) and siloxane polymer solution prepared from acid-catalyzed hydrolysis of MTES (methyl-triethoxysilane) or DDS (dimethyldiethoxysilane). The xerogels were tested at the small angle x-ray scattering (SAXS) station of Beijing Synchrotron Radiation Facility. The distribution of pore size, the average size of pores D-SAXS, and the thickness of interface layer E were calculated. With the aid of nitrogen adsorption measurement, the pore structure was analyzed. Some micropores were found to be produced in methyl-modified SiO2 xerogels while second-aggregates were constructed through connecting first-aggregates with siloxane polymer of MTES or of DDS. At the same time, methyl groups were attached to the bone of SiO2 clusters and become an interface layer between bone and pore. The interface layer have effects on both pore size and the adsorption of nitrogen in methyl-modified xerogels. Through transmission electron microscope we confirmed that the pore structures of the xerogels were affected strongly by the two different siloxane polymers. SAXS is a powerful technique to study pore structure of xerogel system.
学科主题	Physics
类目[WOS]	Physics, Multidisciplinary
研究领域[WOS]	Physics
原文出处	SCI
语种	英语
WOS记录号	WOS:000181642200023
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/238156]
专题	高能物理研究所_多学科研究中心高能物理研究所_粒子天体物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Xu, Y,Li, ZH,Fan, WH,et al. Pore structures of methyl-modified silica xerogels by small angle x-ray scattering[J]. ACTA PHYSICA SINICA,2003,52(3):635-640.
APA	Xu, Y.,Li, ZH.,Fan, WH.,Wu, D.,Sun, YH.,...&董宝中.(2003).Pore structures of methyl-modified silica xerogels by small angle x-ray scattering.ACTA PHYSICA SINICA,52(3),635-640.
MLA	Xu, Y,et al."Pore structures of methyl-modified silica xerogels by small angle x-ray scattering".ACTA PHYSICA SINICA 52.3(2003):635-640.