高等学校化学学报2011，Vol.32Issue(12)：2896-2901,6.
SiO2纳米粒子对受限流场下聚异丁烯/聚二甲基硅氧烷共混物相形态的影响
Effect of Silica Nanoparticles on the Morphology of Immiscible PIB/PDMS Blends in Confined Shear Flow
摘要
Abstract
The morphology development in immiscible polymer blends under confined shear flow ( such as in the field of micro-processing) usually differs significantly to that observed in bulk conditions. In this work, the effect of silica nanoparticles with different surface properties on the morphology development of immiscible polyisobutylene(PIB)/polydimethylsiloxane( PDMS) ( 10 : 90) blends under confined shear flow was investigated. The confined environment was created by an optical-shear cell united system. It was found that the addition of only a very small amount(0. 2% ) of hydrophobic SiO2 nanoparticles could suppress the coalescence of dispersed droplets effectively and thus decreased the confinement degree of droplets. As a result, the formation of the superstructures(such as pearl necklaces and strings) , as presented in the pure PIB/PDMS blends, were prevented and the blends displayed a near bulk behavior. On the contrary, the blends with the addition of small amount of hydrophilic SiO2 nanoparticles still formed superstructures of dispersed droplets under shear flow. Bulk behavior of dispersed phase could only be obtained with higher concentration of the hydrophilic SiO2 nanoparticles and under higher shear rate.关键词
聚异丁烯/聚二甲基硅氧烷/SiO2纳米粒子/受限/剪切/相形态Key words
Polyisobutylene/polydimethylsiloxane ( PIB/PDMS ) / SiO2 nanoparticle/ Confinement/ Shearing/ Phase morphology分类
化学化工引用本文复制引用
彭小娟,黄亚江,何郁嵩,罗勇,杨其,李光宪..SiO2纳米粒子对受限流场下聚异丁烯/聚二甲基硅氧烷共混物相形态的影响[J].高等学校化学学报,2011,32(12):2896-2901,6.基金项目
国家自然科学基金(批准号:51003062)资助. （批准号:51003062）
