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用于微滤的无色透明聚酰亚胺膜的合成

Syntheses of Colorless and Transparent Polyimide Membranes for Microfiltration.

作者信息

Kim Jong Won, Chang Jin-Hae

机构信息

Department of Polymer Science and Engineering, Kumoh National Institute of Technology, Gumi 39177, Korea.

出版信息

Polymers (Basel). 2020 Jul 20;12(7):1610. doi: 10.3390/polym12071610.

DOI:10.3390/polym12071610
PMID:32698338
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7408252/
Abstract

Herein, poly(amic acid) (PAA) was synthesized using 4,4'-(hexafluoroisopropylidene) diphthalic anhydride (6FDA) as a dianhydride and 2,2-bis(3-aminophenyl)hexafluoropropane (6FAm) and 2,2-bis(3-amino-4-hydroxyphenyl)hexafluoropropane (6FAm-OH) as diamines. Poly(vinyl alcohol) (PVA) at various contents (0-5.0 wt%) was blended with PAA to prepare a composite material. Then, colorless and transparent polyimide (CPI) composite films were prepared by applying various stages of heat treatment using the PAA/PVA blend film as a precursor. These film-type composites were immersed in water to completely dissolve PVA, a water-soluble polymer, and their pore sizes were investigated to determine their potential as a porous membrane. According to the results of scanning electronic microscopy (SEM), as the concentration of PVA increased from 0 to 5.0 wt% in the CPI/PVA composite films, the size of the pores resulting from the dissolution of water-soluble PVA increased. Further, the micrometer-sized pores were uniformly dispersed in the CPI films. The thermal properties, morphology, and optical transparency of the two types of CPI membranes synthesized using 6FAm and 6FAm-OH monomers were examined and compared.

摘要

在此，以4,4'-(六氟异丙基)二邻苯二甲酸酐(6FDA)为二酐，2,2-双(3-氨基苯基)六氟丙烷(6FAm)和2,2-双(3-氨基-4-羟基苯基)六氟丙烷(6FAm-OH)为二胺合成了聚酰胺酸(PAA)。将不同含量(0 - 5.0 wt%)的聚乙烯醇(PVA)与PAA共混以制备复合材料。然后，以PAA/PVA共混膜为前驱体，通过进行不同阶段的热处理制备了无色透明的聚酰亚胺(CPI)复合膜。将这些膜型复合材料浸入水中以完全溶解水溶性聚合物PVA，并研究其孔径以确定其作为多孔膜的潜力。根据扫描电子显微镜(SEM)的结果，在CPI/PVA复合膜中，随着PVA浓度从0增加到5.0 wt%，水溶性PVA溶解产生的孔尺寸增大。此外，微米级的孔均匀地分散在CPI膜中。对使用6FAm和6FAm-OH单体合成的两种类型的CPI膜的热性能、形态和光学透明度进行了检测和比较。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c74/7408252/a86119080e11/polymers-12-01610-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c74/7408252/4a92e9dcd45a/polymers-12-01610-sch001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c74/7408252/61b364298b1c/polymers-12-01610-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c74/7408252/b89529860f88/polymers-12-01610-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c74/7408252/020660ece368/polymers-12-01610-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c74/7408252/5e046551b0b0/polymers-12-01610-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c74/7408252/e5465244e011/polymers-12-01610-sch002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c74/7408252/8f43cb306248/polymers-12-01610-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c74/7408252/d9f810870bf7/polymers-12-01610-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c74/7408252/200ae63c86c7/polymers-12-01610-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c74/7408252/c86647a7499f/polymers-12-01610-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c74/7408252/a86119080e11/polymers-12-01610-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c74/7408252/4a92e9dcd45a/polymers-12-01610-sch001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c74/7408252/61b364298b1c/polymers-12-01610-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c74/7408252/b89529860f88/polymers-12-01610-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c74/7408252/020660ece368/polymers-12-01610-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c74/7408252/5e046551b0b0/polymers-12-01610-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c74/7408252/e5465244e011/polymers-12-01610-sch002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c74/7408252/8f43cb306248/polymers-12-01610-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c74/7408252/d9f810870bf7/polymers-12-01610-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c74/7408252/200ae63c86c7/polymers-12-01610-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c74/7408252/c86647a7499f/polymers-12-01610-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4c74/7408252/a86119080e11/polymers-12-01610-g009.jpg

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