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首页> 外文期刊>Separation and Purification Technology >Exploring Torlon/P84 co-polyamide-imide blended hollow fibers and their chemical cross-linking modifications for pervaporation dehydration of isopropanol
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Exploring Torlon/P84 co-polyamide-imide blended hollow fibers and their chemical cross-linking modifications for pervaporation dehydration of isopropanol

机译：探索Torlon / P84共聚酰胺-酰亚胺共混中空纤维及其对异丙醇全蒸发脱水的化学交联改性

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摘要

A research study has been conducted to fabricate and chemically modify Torlon~R 4000T and Torlon/P84 co-polyamide-imide blended hollow fibers as new materials for the dehydration of isopropanol(IPA).It has been found that Torlon/P84 blends are miscible,as confirmed through the single glass transition temperatures(T_gs)detected by differential scanning calorimetry(DSC).Both pure and blended hollow fibers fabricated from the dry-jet wet-spinning process do not show sufficient resistance to suppress water and IPA induced swelling,whereas cross-linked pure Torlon hollow fibers show only marginal improvement.However,the Torlon/P84 blended fibers display enhanced separation performance after chemical cross-linking modification with the aid of p-xylenediamine.It is believed that the p-xylenediamine induced cross-linking reactions result in greater chain packing and the reduction of free volume.The highest separation factor obtained was 185 ± 8 for the 85/15 wt.% IPA/H2O feed solution and the total permeation flux obtained was 1000 ± 45 g/m2 h.
机译：已经进行了研究制造和化学改性Torlon〜R 4000T和Torlon / P84共聚酰胺-酰亚胺共混的中空纤维，作为异丙醇（IPA）脱水的新材料。已发现Torlon / P84共混物是可混溶的如通过差示扫描量热法（DSC）检测到的单一玻璃化转变温度（T_gs）所证实。采用干喷湿纺工艺制造的纯中空纤维和混纺中空纤维均未显示出足够的耐水压性和IPA诱导的溶胀性，然而，交联的纯Torlon中空纤维仅显示出少量改善。但是，在对二甲苯二胺的化学交联改性之后，Torlon / P84混纺纤维表现出增强的分离性能。连接反应导致更大的链堆积和自由体积的减少。对于85/15 wt。％IPA / H2O进料溶液和获得的总渗透通量为1000±45g / m 2 h。

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