陶瓷

Abstract(#br)We have developed novel thin film composite (TFC) membranes on ceramic substrates (referred as ceramic TFC membranes thereafter) for pervaporation dehydration of isopropanol (IPA) by using interfacial polymerization (IP) of m-phenylenediamine (MPD) and trymesoylchoride (TMC) to create ultra-thin polyamide films as selective layers. Prior to IP, a gutter layer of polydopamine (PDA) or polyethyleneimine (PEI) was deposited on α-alumina ceramic surfaces to improve the adhesion of polyamide thin films onto the ceramic.

Abstract(#br)The dehydration of glycerin solution is an important step in glycerin purification process. In present work, pervaporative dehydration of glycerin solution was studied using HybSi and polydimethylsiloxane (PDMS) pervaporation membranes. The effects of physical property of membrane, operating parameters and glycerin concentrations on the membrane permeate flux and selectivity were examined. The present studies showed that hydrophilic HybSi membrane could provide higher permeate flux as compared to hydrophobic PDMS membrane under an identical operating condition.

本研究首次采用冷烧结工艺制备了高陶瓷体积分数( v / v \u003e 95 % )的( 1 - x ) ZnO-x聚二甲基硅氧烷( PDMS )复合材料，其中0.00≤x≤0.05。利用半自动压力机进行的原位致密化研究表明，材料致密化的驱动机制随聚合物含量的变化而变化。( 1 - x ) ZnO-x PDMS复合材料( 0.00≤x≤0.05 )的相对密度均在90 %以上。复合材料的阻抗谱可以观察到烧结ZnO块体内部的陶瓷–聚合物界面，并且在x = 0.03和x = 0.05时，ZnO–PDMS界面性质决定了其长程传导。该研究还强调了这种以陶瓷为主的陶瓷-聚合物复合材料的复杂性和机遇。