Ammonia catalyzed hydrolysis-condensation kinetics of tetraethoxysilane/dimethyldiethoxysilane mixtures studied by Si-29 NMR and SAXS

CORC > 武汉物理与数学研究所 > 中国科学院武汉物理与数学研究所 > 2011年以前论文发表（包括2011年）

	Ammonia catalyzed hydrolysis-condensation kinetics of tetraethoxysilane/dimethyldiethoxysilane mixtures studied by Si-29 NMR and SAXS
	Xu, Yao ; Sun, Xianyong ; Wu, Dong ; Sun, Yuhan ; Yang, Yongxia ; Yuan, Hanzhen ; Deng, Feng ; Wu, Zhonghua
刊名	JOURNAL OF SOLUTION CHEMISTRY
	2007-03-01
卷号	36 期号:3 页码:327-344
关键词	reaction kinetics Si-29 NMR hydrolysis condensation small angle X-ray scattering tetraethoxysilane (TEOS) dimethyldiethoxysilane (DDS)
英文摘要	In-situ Si-29 liquid-state nuclear magnetic resonance (NMR) was used to investigate the ammonia catalyzed hydrolysis and condensation of the mixed systems of tetraethoxysilane (TEOS) and dimethyldiethoxysilane (DDS) dissolved in methanol. With ammonia catalysis, the hydrolysis reaction orders for TEOS and DDS in the mixed systems remained first order, which is similar to that observed for their corresponding single silane component precursor systems. The hydrolysis rate constant for TEOS in the mixed systems was larger than that of TEOS in the single silane component precursor systems. Meanwhile, the hydrolysis rate constants of DDS in the mixed precursor systems were smaller than those of DDS in the single silane component precursor systems. The hydrolysis and condensation kinetics showed more compatible hydrolysis-condensation relative rates between TEOS and DDS, which remarkably affected the final microstructure of the resulting silica particles. Small angle X-ray scattering (SAXS) experiments showed a typical double fractal structure in the particulate networks.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Chemistry, Physical
研究领域[WOS]	Chemistry
关键词[WOS]	SOL-GEL KINETICS ; MODIFIED SILICA SOLS ; X-RAY-SCATTERING ; SUBSTITUTED ETHOXYSILANES ; STATE NMR ; SPECTROSCOPY ; GROWTH ; TETRAETHOXYSILANE ; SEPARATION ; PARTICLES
收录类别	SCI
语种	英语
WOS记录号	WOS:000245363100005
公开日期	2015-10-13
内容类型	期刊论文
源URL	[http://ir.wipm.ac.cn/handle/112942/7937]
专题	武汉物理与数学研究所_2011年以前论文发表（包括2011年）
作者单位	1.Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Peoples R China 2.Chinese Acad Sci, Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Peoples R China 3.Chinese Acad Sci, Inst High Energy Phys, Lab Synchrotron Radiat, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Xu, Yao,Sun, Xianyong,Wu, Dong,et al. Ammonia catalyzed hydrolysis-condensation kinetics of tetraethoxysilane/dimethyldiethoxysilane mixtures studied by Si-29 NMR and SAXS[J]. JOURNAL OF SOLUTION CHEMISTRY,2007,36(3):327-344.
APA	Xu, Yao.,Sun, Xianyong.,Wu, Dong.,Sun, Yuhan.,Yang, Yongxia.,...&Wu, Zhonghua.(2007).Ammonia catalyzed hydrolysis-condensation kinetics of tetraethoxysilane/dimethyldiethoxysilane mixtures studied by Si-29 NMR and SAXS.JOURNAL OF SOLUTION CHEMISTRY,36(3),327-344.
MLA	Xu, Yao,et al."Ammonia catalyzed hydrolysis-condensation kinetics of tetraethoxysilane/dimethyldiethoxysilane mixtures studied by Si-29 NMR and SAXS".JOURNAL OF SOLUTION CHEMISTRY 36.3(2007):327-344.