Interconnected Porous Polymers with Tunable Pore Throat Size Prepared via Pickering High Internal Phase Emulsions

详细信息    查看全文

• 作者：Hongyun Xu ; Xianhua Zheng ; Yifei Huang ; Haitao Wang ; Qiangguo Du
• 刊名：Langmuir
• 出版年：2016
• 出版时间：January 12, 2016
• 年：2016
• 卷：32
• 期：1
• 页码：38-45
• 全文大小：533K
• ISSN：1520-5827

文摘

Interconnected macroporous polymers were prepared by copolymerizing methyl acrylate (MA) via Pickering high internal phase emulsion (HIPE) templates with modified silica particles. The pore structure of the obtained polymer foams was observed by field-emission scanning electron microscopy (FE-SEM). Gas permeability was characterized to evaluate the interconnectivity of macroporous polymers. The polymerization shrinkage of continuous phase tends to form open pores while the solid particles surrounding the droplets act as barriers to produce closed pores. These two conflicting factors are crucial in determining the interconnectivity of macroporous polymers. Thus, poly-Pickering HIPEs with high permeability and well-defined pore structure can be achieved by tuning the MA content, the internal phase fraction, and the content of modified silica particles.