Surface properties of submicrometer silica spheres modified with aminopropyltriethoxysilane and phenyltriethoxysilane

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	Surface properties of submicrometer silica spheres modified with aminopropyltriethoxysilane and phenyltriethoxysilane
	Wu, Zhijian ; Xiang, Hong ; Kim, Taehoon ; Chun, Myung-Suk ; Lee, Kangtaek
	2006-12-01
发表期刊	JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷号	304 期号:1 页码:119-124
关键词	Surface Modification Silica Spheres Aminopropyltriethoxysilane Phenyltriethoxysilane Surface Properties Organic Dye Adsorption
摘要	The surface of submicrometer silica spheres are modified with aminopropyl and phenyl groups through a one-step process. Various experimental techniques, i.e., scanning electron microscopy (SEM), quasi-elastic light scattering (QELS), differential scanning calorimetry (DSC), thermogravimetry (TG), zeta potential measurement, nitrogen sorption, and water vapor and organic dye adsorption are used to comprehensively characterize the pure (TEOS particles) and modified silica particles. The SEM micrographs of the particles demonstrate that the modified particles are spherical with uniform size and shape. The particles modified with aminopropyl groups (APTES particles) show the highest isoelectric point (IEP) and the highest weight loss at 780 degrees C because of the basic nature of aminopropyl groups and the higher reactivity of aminopropyltriethoxysilane. The particles modified with the phenyl groups (PhTES particles) show the lowest water vapor adsorption because their surface is more hydrophobic than that of TEOS and APTES particles. The organic dye (brilliant blue FCF or BBF) adsorption experiments demonstrate that the adsorption capacity of the particles increases greatly after acidification. This is caused by the protonation of silanol groups and amine groups on the particle surface, which presents an enhanced electrostatic attraction with BBF anions. The APTES particles exhibit the highest dye adsorption due to the hydrophobic attractions and the enhanced electrostatic attractions from aminopropyl groups. (c) 2006 Elsevier Inc. All rights reserved.
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/5768
专题	青海盐湖研究所知识仓储中国科学院青海盐湖研究所
作者单位	1.Yonsei Univ, Dept Chem Engn, Seoul 120749, South Korea 2.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China 3.Huaqiao Univ, Coll Mat Sci & Engn, Quanzhou 362021, Peoples R China 4.Korea Inst Sci & Technol, Complex Fluids Res Lab, Seoul 130650, South Korea
推荐引用方式 GB/T 7714	Wu, Zhijian,Xiang, Hong,Kim, Taehoon,et al. Surface properties of submicrometer silica spheres modified with aminopropyltriethoxysilane and phenyltriethoxysilane[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2006,304(1):119-124.
APA	Wu, Zhijian,Xiang, Hong,Kim, Taehoon,Chun, Myung-Suk,&Lee, Kangtaek.(2006).Surface properties of submicrometer silica spheres modified with aminopropyltriethoxysilane and phenyltriethoxysilane.JOURNAL OF COLLOID AND INTERFACE SCIENCE,304(1),119-124.
MLA	Wu, Zhijian,et al."Surface properties of submicrometer silica spheres modified with aminopropyltriethoxysilane and phenyltriethoxysilane".JOURNAL OF COLLOID AND INTERFACE SCIENCE 304.1(2006):119-124.