Tu Shuhua, Chen Min, Wu Limin
Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers, Advanced Coatings Research Center of Ministry of Education of China, Fudan University, Shanghai 200433, China.
Department of Materials Science and State Key Laboratory of Molecular Engineering of Polymers, Advanced Coatings Research Center of Ministry of Education of China, Fudan University, Shanghai 200433, China.
J Colloid Interface Sci. 2020 Apr 15;566:338-346. doi: 10.1016/j.jcis.2020.01.053. Epub 2020 Jan 17.
Elastic porous organosilica monoliths (POMs) are successfully prepared by water in oil (w/o) high internal phase emulsions (HIPEs) with a novel silica precursor named polyethoxysiloxane (PEOS) as sole stabilizer. The stability of the HIPEs and the mechanical strength of the POMs are investigated as functions of PEOS and crosslinker contents in the oil phase. FESEM reveals that PEOS molecules play a significant role of in-situ growth into silica particles to strengthen the POMs, which enables the successful preparation of elastic POMs. Furthermore, oil-water separation behavior of the POMs is studied. Both the absorbent capacity and speed are considerably superior to the previously reported PDMS sponges.
以一种名为聚乙氧基硅氧烷（PEOS）的新型二氧化硅前驱体作为唯一稳定剂，通过油包水（w/o）高内相乳液（HIPE）成功制备了弹性多孔有机硅整体材料（POM）。研究了HIPE的稳定性以及POM的机械强度与油相中PEOS和交联剂含量的关系。场发射扫描电子显微镜（FESEM）显示，PEOS分子在原位生长为二氧化硅颗粒以增强POM方面发挥了重要作用，这使得弹性POM的成功制备成为可能。此外，还研究了POM的油水分离行为。其吸收容量和速度均大大优于先前报道的聚二甲基硅氧烷（PDMS）海绵。
