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采用浓乳液法制备了聚丙烯腈多孔材料,研究了交联单体的含量、SiO_2浓度和分散相的体积分率等因素对聚丙烯腈多孔材料结构的影响,并使用扫描电镜及氮气等温吸附等手段对材料的结构进行了表征。结果表明,在浓乳液中,纳米SiO_2粒子会吸附在乳液的界面上起到共乳化剂的作用,阻止乳液中分散相液滴的聚集,从而能够有效地提高乳液的稳定性;通过调节浓乳液的组成,如分散相的体积分率、SiO_2和交联剂的浓度等参数可以有效地控制聚丙烯腈多孔材料的孔结构。
The polyacrylonitrile porous materials were prepared by using the concentrated emulsion method. The effects of the content of the crosslinking monomer, SiO 2 concentration and the volume fraction of the dispersed phase on the structure of polyacrylonitrile porous materials were investigated. Scanning electron microscopy and nitrogen isothermal adsorption And other means of material structure was characterized. The results show that nano-SiO 2 particles can adsorb at the interface of the emulsion and act as co-emulsifier to prevent the aggregation of dispersed droplets in the emulsion, which can effectively improve the stability of the emulsion. In the concentrated emulsion, Such as the volume fraction of dispersed phase, the concentration of SiO 2 and cross-linking agent, can effectively control the pore structure of polyacrylonitrile porous materials.