Study on the ammonia-catalyzed hydrolysis kinetics of single phenyltriethoxysilane and mixed phenyltriethoxysilane/tetraethoxysilane systems by liquid-state Si-29 NMR

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）

	Study on the ammonia-catalyzed hydrolysis kinetics of single phenyltriethoxysilane and mixed phenyltriethoxysilane/tetraethoxysilane systems by liquid-state Si-29 NMR
	Sun, Xianyong ; Xu, Yao ; Jiang, Dong ; Yang, Dongjiang ; Wu, Dong ; Sun, Yuhan ; Yang, Yongxia ; Yuan, Hanzhen ; Deng, Feng
刊名	COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
	2006-10-15
卷号	289 期号:1-3 页码:149-157
关键词	hydrolysis condensation kinetics Si-29 NMR siloxane
英文摘要	In situ Si-29 liquid-state nuclear magnetic resonance was used to investigate the ammonia-catalyzed hydrolysis and condensation of the single phenyltriethoxysilane (PTES) systems and the mixed tetraethoxysilane (TEOS)/PTES systems dissolved in methanol. By varying the molar ratio of the PTES, water and ammonia in the initial solutions, the hydrolysis rate constants for PTES in single precursor systems were disclosed as well as the corresponding reaction orders by fitting the concentration curves of the intermediate species as functions of time. Due to the cooperation of inductive and steric effect, PTES shows a low reaction activity. Under ammonia catalysis, the hydrolysis reaction orders of TEOS and PTES in the mixed precursor systems all retained the first-order, which is similar to single precursor systems. The hydrolysis rate constants of TEOS and PTES in the mixed systems were larger than the values of TEOS and PTES in their single precursor systems, respectively. Another important result was: the reaction orders of both ammonia and water increased to different extent for TEOS and PTES in mixed systems. Hydrolysis and condensation kinetics showed more compatible hydrolysis-condensation relative rates between TEOS and PTES, which affected remarkably the final microstructure of silica particles. (c) 2006 Elsevier B.V. All rights reserved.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Chemistry, Physical
研究领域[WOS]	Chemistry
关键词[WOS]	ORGANICALLY MODIFIED SILICATES ; SOL-GEL KINETICS ; SUBSTITUTED ETHOXYSILANES ; OPTICAL-PROPERTIES ; HYBRID MATERIALS ; STEADY-STATE ; THIN-FILMS ; CONDENSATION ; SPECTROSCOPY ; POLYMERS
收录类别	SCI
语种	英语
WOS记录号	WOS:000241976500020
公开日期	2015-07-28
内容类型	期刊论文
源URL	[http://ir.wipm.ac.cn/handle/112942/4614]
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, Grad Sch, Beijing 100039, Peoples R China 3.Chinese Acad Sci, Inst Phys & Math, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Peoples R China
推荐引用方式 GB/T 7714	Sun, Xianyong,Xu, Yao,Jiang, Dong,et al. Study on the ammonia-catalyzed hydrolysis kinetics of single phenyltriethoxysilane and mixed phenyltriethoxysilane/tetraethoxysilane systems by liquid-state Si-29 NMR[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,2006,289(1-3):149-157.
APA	Sun, Xianyong.,Xu, Yao.,Jiang, Dong.,Yang, Dongjiang.,Wu, Dong.,...&Deng, Feng.(2006).Study on the ammonia-catalyzed hydrolysis kinetics of single phenyltriethoxysilane and mixed phenyltriethoxysilane/tetraethoxysilane systems by liquid-state Si-29 NMR.COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,289(1-3),149-157.
MLA	Sun, Xianyong,et al."Study on the ammonia-catalyzed hydrolysis kinetics of single phenyltriethoxysilane and mixed phenyltriethoxysilane/tetraethoxysilane systems by liquid-state Si-29 NMR".COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 289.1-3(2006):149-157.