Vilanova Neus, Kolen'ko Yury V, Solans Conxita, Rodríguez-Abreu Carlos
Institute for Advanced Chemistry of Catalonia, Consejo Superior de Investigaciones Científicas (IQAC-CSIC) and CIBER de Bioingeniería, Biomateriales y Nanomedicina, Jordi Girona 18-26, 08034 Barcelona, Spain.
International Iberian Nanotechnology Laboratory, Av. Mestre José Veiga s/n, 4715-330 Braga, Portugal.
J Colloid Interface Sci. 2015 Jan 1;437:235-243. doi: 10.1016/j.jcis.2014.09.006. Epub 2014 Sep 16.
Multiple emulsion templating is a versatile strategy for the synthesis of porous particles. The present work addresses the synthesis of multifunctional poly(dimethylsiloxane) porous particles using multiple water-in-oil-in-water emulsions as soft templates with an oil phase constituted by a crosslinkable poly(dimethylsiloxane) (PDMS) oil. Herewith, the impact of the viscosity of PDMS oil (i.e., molecular weight) on the properties of both the emulsion templates and the resulting particles was evaluated. The viscosity of PDMS oil has a strong effect on the size and polydispersity of the emulsion templates as well as on the mechanical properties of the derived particles. The elastic modulus can be tuned by mixing PDMS oils of different viscosities to form bimodal crosslinked networks. Iron oxide nanoparticles can be readily incorporated into the emulsion templates to provide additional functionalities to the silicone particles, such as magnetic separation or magnetic hyperthermia. The synthesized composite magnetic particles were found to be useful as recoverable absorbent materials (e.g., for oil spills) by taking advantage of their high buoyancy and high hydrophobicity.
多重乳液模板法是一种合成多孔颗粒的通用策略。本工作致力于使用水包油包水多重乳液作为软模板，以可交联聚二甲基硅氧烷（PDMS）油构成油相，合成多功能聚二甲基硅氧烷多孔颗粒。据此，评估了PDMS油的粘度（即分子量）对乳液模板及所得颗粒性能的影响。PDMS油的粘度对乳液模板的尺寸和多分散性以及衍生颗粒的机械性能有强烈影响。通过混合不同粘度的PDMS油以形成双峰交联网络，可以调节弹性模量。氧化铁纳米颗粒可以很容易地掺入乳液模板中，为硅氧烷颗粒提供额外功能，如磁分离或磁热疗。通过利用其高浮力和高疏水性，发现合成的复合磁性颗粒可用作可回收吸收材料（如用于溢油清理）。
