Structure and Characteristics of Organic-Inorganic Hybrid Hydrogels Based on Poly(N-vinylcaprolactam)-SiO2

被引：5
|
作者：
Bakeeva, I. V. [1 ]
Ozerina, L. A. [2 ]
Ozerin, A. N. [2 ]
Zubov, V. P. [1 ]
机构：
[1] Lomonosov State Acad Fine Chem Technol, Moscow 119571, Russia
[2] Russian Acad Sci, Inst Synthet Polymer Mat, Moscow 117393, Russia
来源：
POLYMER SCIENCE SERIES A | 2010年 / 52卷 / 05期
基金：
俄罗斯基础研究基金会;
关键词：
SCATTERING; POLYMERS; MACROMOLECULES; RESOLUTION; SYSTEMS;
D O I：
10.1134/S0965545X10050044
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
In the reaction system of poly(N-vinylcaprolactam)-water-tetramethoxysilane, the effect of concentrations and ratios between compounds on the structure and characteristics of the formed organic-inorganic hybrid hydrogels based on poly(N-vinylcaprolactam) and silica particles is studied. When the over-all concentration of precursors is increased, the number of bonds between hydrogel components increases, and an increase in the number of network crosslinks is provided by an increased fraction of tetramethoxysilane. The method of small-angle X-ray analysis is used to estimate quantitative structural characteristics of silica particles in hydrogels. Silica particles are found to form a fractal three-dimensional structure, which is composed of individual compact clusters with lateral dimensions of 40-60 angstrom. The average linear dimensions of scattering anisometric particles are 100 x 120 x 360 angstrom. A model for the three-dimensional structure is proposed for hydrogel formed via the interaction of poly(N-vinylcaprolactam) macromolecules and silica nanoparticles. The average distance between silica particles is estimated.
引用
收藏
页码：496 / 505
页数：10
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