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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Effect of co-solvent on the structure and dielectric properties of porous polyimide membranes
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Effect of co-solvent on the structure and dielectric properties of porous polyimide membranes

机译：共溶剂对多孔聚酰亚胺膜结构和介电性能的影响

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摘要

A series of porous polyimide (PI) membranes with 3,3',4,4'-benzophenonetetracarboxylic dianhydride (BTDA) and 4,4'-diaminodiphenyl ether (ODA) in the different ratio of co-solvent (N, N-dimethylacetamide (DMAC)/1, 4-butyrolactone (GBL)) were prepared by a novel wet phase inversion method. The influence of co-solvent on the structure and dielectric properties of membranes were investigated. PI membranes changed from finger-like structure to spongy-like structure with the increasing of the GBL content since the intermolecular interaction between PI induced by GBL. The proportion and size of finger-like structure gradually decreased with the increase of GBL content in DMAC/GBL co-solvent. Although PI membranes exhibited low dielectric permittivity ranges from 1.7-2.5, the dielectric breakdown strengths were also relatively low. In particular, the PI from pure GBL yielded the highest breakdown strength (260.05 kV mm(-1)) since the low proportion of macrovoids and defects. Moreover, when the ratio of GBL/DAMC was 84/16, the resultant PI membrane possessed a low dielectric constant (1.99) as well as relatively high breakdown strength (100.53 kV mm(-)(1)). Therefore, porous PI membraness may be potential in many applications of electronics and microelectronics.
机译：一系列多孔聚酰亚胺（PI）膜，具有3,3'，4,4'-苯二甲酸四羧酸二酐（BTDA）和4,4'-二氨基二烷基醚（ODA）的共溶剂（N，N-二甲基乙酰胺的不同比例（DMAC）/ 1,4-丁内酯（GBL）通过新型湿相反相方法制备。研究了共溶剂对膜结构和介电性能的影响。由于GBL诱导的PI之间的分子间相互作用，PI膜从指状结构变为海绵状结构，随着GBL含量的增加。随着DMAC / GBL共溶剂中的GBL含量的增加，指状结构的比例和尺寸逐渐降低。虽然PI膜从1.7-2.5表现出低介电常数范围，但介电击穿强度也相对较低。特别地，来自纯GBL的PI产生了由于宏观体和缺陷比例低，因此产生了最高的击穿强度（260.05kVmm（-1））。此外，当GBL / DAMC的比率为84 /如84/16时，所得的PI膜具有低介电常数（1.99），以及相对高的击穿强度（100.53kVmm（ - ）（1））。因此，多孔PI膜可能是电子和微电子的许多应用中的潜力。

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