Macroporous Polyimide with High Porosity via Precursor Mediated Emulsion Templating
발표자
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초록
내용
Poly(amic acid) salt (PAAS) is an amphiphilic molecule that a lipophilic polymer backbone is conjugated with the hydrophilic organic bases, which is a precursor to be converted to polyimide via thermal imidization process. The PAAS is known as stabilizes the interface of water and oil, even up to internal volume ＞74 vol% that is high internal phase emulsion (HIPE). But still, a few of the PAAS has been considered as an emulsifier due to the lack of a basic study on the correlation between their chemical structure and interfacial activity. In this study, we explore the combinations of poly(amic acid) and organic bases that are suitable for stabilizing the oil-water interfaces to build the HIPE. We also present the preparation of macroporous polyimide by using freeze-drying and thermal imidization processes. By doing so, we will propose the preparation method for thermally-stable macroporous polyimide with high porosity and 3D continuous structure having various chemical structures.