壳聚糖膜初始状态对渗透蒸发脱水分离性能的影响

IF 0.8 Q4 MATERIALS SCIENCE, BIOMATERIALS

Progress on Chemistry and Application of Chitin and its Derivatives Pub Date : 2022-09-30 DOI:10.15259/pcacd.27.007

M. Gnus

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引用次数: 0

摘要

在本研究中，以不同分子量（175-230kDa）和脱乙酰度（92%-98%）的壳聚糖为原料制备了膜，并研究了在溶胀和干燥的初始状态下通过渗透蒸发对乙醇-水共沸混合物的脱水。讨论了壳聚糖性质的影响以及膜初始状态对分离性能的影响。所获得的膜的结构在干燥过程中发生变化，并影响膜传输参数和膜稳定时间。壳聚糖特性对转运参数的影响取决于膜的初始状态。壳聚糖的分子量影响乙醇的运输，而壳聚糖的脱乙酰度影响水的运输。此外，具有最低分子量的壳聚糖改善了膜的分离性能。

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INFLUENCE OF INITIAL STATE OF CHITOSAN MEMBRANES ON THEIR SEPARATION PROPERTIES IN PERVAPORATIVE DEHYDRATION

In this study, membranes from chitosan with different molecular weights (175-230 kDa) and degree of deacetylation (92%-98%) were prepared and dehydration of a ethanol-water azeotropic mixture by pervaporation on membranes in the swollen and dry initial state was investigated. The influence of chitosan characteristics and the effect of the initial membrane state on separation properties are discussed. The structure of the obtained membranes changed during the drying process and affected the membrane transport parameters and time to membrane stabilisation. The impact of chitosan characteristics on the transport parameters depended on the initial membrane state. The chitosan molecular weight influenced ethanol transport, whereas the chitosan degree of deacetylation affected water transport. In addition, chitosan with the lowest molecular weight improved the separation properties of the membranes.

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来源期刊

Progress on Chemistry and Application of Chitin and its Derivatives MATERIALS SCIENCE, BIOMATERIALS-

CiteScore

1.10

自引率

16.70%

发文量

期刊介绍： Progress in the Chemistry and Application of Chitin and its Derivatives is an annual journal focused on all aspects of production, modification, enzymology and application of chitin and its many derivatives, including chitosan. The journal publishes full-length papers as well as invited reviews. To be considered, papers must present original research that has not been published or accepted for publication elsewhere. The language of the journal will be English.