Open-cell PDMS polyHIPEs prepared using polymethylvinylsiloxane to prevent pore collapse
Open-cell PDMS polyHIPEs prepared using polymethylvinylsiloxane to prevent pore collapse
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DOI：
10.1016/j.polymer.2023.125787
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发表时间：
2023-02
期刊：
影响因子：
4.6
通讯作者：
Anthony Smith;N. Ayres
中科院分区：
文献类型：
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作者：
Anthony Smith;N. Ayres
聚合高内相乳液(PolyHIPE)是使用乳液模板制成的多孔聚合物。本课题组先前已经证明，通过硫醇-烯交联反应制备的聚二甲基硅氧烷聚HIPE可获得最大总孔隙率为∼63%的聚合物。由于PDMS的柔软性质，试图通过增加分散相的体积分数来增加总孔隙率会导致多孔材料的崩溃。在这项工作中，合成了聚甲基乙烯基硅氧烷(PMVS)，使其在网络中具有高的交联度。该聚合物可以在连续相中与二乙烯基聚二甲基硅氧烷共混，获得大范围(25-900 kpa)的储存模数，最终得到总孔隙率较高(74-77%)的聚HIPE。最后，展示了这些PDMS PolyHIPE作为油水混合物的分离介质的应用。
Polymerized high internal phase emulsions (PolyHIPEs) are porous polymers made using an emulsion template. Our group has previously shown that polydimethylsiloxane (PDMS) polyHIPEs prepared using a thiol-ene crosslinking reaction could obtain a maximum total porosity of ∼63%. Attempting to increase total porosity by increasing the volume fraction dispersed phase resulted in collapse of the porous material due to the soft nature of PDMS. In this work, polymethylvinylsiloxane (PMVS) was synthesized to impart high crosslinking density in the network. This polymer can be blended with divinyl-PDMS in the continuous phase to obtain a large range of storage moduli (25–900 kPa) in the final polyHIPEs with higher total porosity (74–77%). Finally, the use of these PDMS PolyHIPEs as separation media for oil/water mixtures has been demonstrated.