Two fractal structures of methyl-modified Silica gels by SAXS

	Two fractal structures of methyl-modified Silica gels by SAXS
	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:2 页码:442-447
关键词	methyl-modified gel silica SAXS fractal structure
其他题名	小角x 射线散射法研究甲基改性氧化硅凝胶的双分形结构
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, Lab Synchrotron Radiat, Beijing 100039, Peoples R China
英文摘要	With tetraethoxysilane [ Si(OC2 H-5)(4), TEOS] and methyltriethoxysilane [ CH3 Si(OC2 H-5)(3), MTES] as precursors, two kinds of methyl-modified silica gels were prepared by the two-step method and co-hydrolysis method. The gels were tested at the small angle x-ray scattering( SAXS) Station of Beijing Synchrotron Radiation Facility( BSRF). We calculated the average particle diameter and the special surface area between the two phases. On the basis of these data the fractal characters of gels were analyzed, and two fractal structures were found in all the samples. The two fractal dimensions indicated two fractal structures on two scales, i.e., from primary SiO2 particles to first-aggregates and from first- aggregates to clusters. Aided by transmission electronic microscope (TEM) we confirmed the two different microstructures of the gels prepared using the two different methods. It can be said that SAXS is a powerful technigue to study microstructures of gel systems by studying its fractal structure.
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:000181325100036
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/237500]
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. Two fractal structures of methyl-modified Silica gels by SAXS[J]. ACTA PHYSICA SINICA,2003,52(2):442-447.
APA	Xu, Y.,Li, ZH.,Fan, WH.,Wu, D.,Sun, YH.,...&董宝中.(2003).Two fractal structures of methyl-modified Silica gels by SAXS.ACTA PHYSICA SINICA,52(2),442-447.
MLA	Xu, Y,et al."Two fractal structures of methyl-modified Silica gels by SAXS".ACTA PHYSICA SINICA 52.2(2003):442-447.