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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Silica Nanoparticle-Mediated Solution-Phase Separation to Highly Porous Polylactide Membranes
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Silica Nanoparticle-Mediated Solution-Phase Separation to Highly Porous Polylactide Membranes

机译:二氧化硅纳米粒子介导的溶液相分离法制备高度多孔的聚乳酸膜

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摘要

Immersion precipitation of polylactide (PLA)/ chloroform solutions in methanol yields membranes with lack of pore interconnectivity. In contrast, incorporation of silica nanoparticles (NPs) in the solutions promotes pore interconnectivity throughout the membranes. The selective association of silica NPs with chloroform upon phase separation significantly prevents the contraction caused by the formation of the PLA matrix, thus responsible for pore interconnectivity. Besides, pore size can be tailored by the PLA concentration in the solutions and the polarity of silica NPs. This study demonstrates that silica NPs can mediate solution-phase separation during immersion precipitation, which provides a facile route to achieve highly porous membranes.
机译:聚丙交酯(PLA)/氯仿溶液在甲醇中的沉浸沉淀产生的膜缺乏孔内连通性。相反,溶液中掺入二氧化硅纳米颗粒(NPs)会促进整个膜的孔互连。相分离时,二氧化硅NP与氯仿的选择性缔合可显着防止由PLA基质的形成引起的收缩,从而实现孔的互连性。此外,孔径可以通过溶液中的PLA浓度和二氧化硅NPs的极性来定制。这项研究表明,二氧化硅纳米颗粒可以在浸没沉淀过程中介导溶液相分离,这为获得高度多孔的膜提供了一种简便的途径。

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