Analysis of annealing effect on pervaporation properties of PVA-GPTMS hybrid membranes through PALS
Analysis of annealing effect on pervaporation properties of PVA-GPTMS hybrid membranes through PALS
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DOI：
10.1016/j.memsci.2006.04.031
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发表时间：
2006-09
影响因子：
9.5
通讯作者：
Fubing Peng;Lianyu Lu;Honglei Sun;Zhongyi Jiang
中科院分区：
文献类型：
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作者：
Fubing Peng;Lianyu Lu;Honglei Sun;Zhongyi Jiang
退火在调整有机-无机杂化膜的形态和性能方面的重要性越来越被人们所认识。本研究采用原位溶胶-凝胶法制备了由聚乙烯醇（PVA）和γ-（缩水氧基丙基）三甲氧基硅烷（GPTMS）组成的新型有机无机杂化膜。为了阐明退火温度和退火时间对PVA-GPTMS杂化膜溶胀、吸附和渗透汽化性能的影响，采用正电子湮灭寿命谱（PALS）对膜的自由体积特性进行了系统分析。此外，还研究了进料组成和操作温度对退火膜渗透蒸发性能的影响。
The importance of annealing in tuning the morphology and thus the properties of organic–inorganic hybrid membranes becomes more and more realized. In this study, novel organic–inorganic hybrid membranes composed of poly(vinyl alcohol) (PVA) and γ-(glycidyloxypropyl)trimethoxysilane (GPTMS) were prepared through in situ sol–gel approach. To elucidate the effect of annealing temperature and annealing time on swelling and sorption properties as well as pervaporation properties of PVA-GPTMS hybrid membranes, the free volume characteristics of the membranes were systematically analyzed by positron annihilation lifetime spectroscopy (PALS). Furthermore, the effects of feed composition and operating temperature on pervaporation properties of annealed membranes were also investigated.