高等学校化学学报2011，Vol.32Issue(4)：984-989,6.
聚乙烯醇/纳米纤维素复合膜的渗透汽化性能及结构表征
Pervaporation Properties and Characterization of Poly( vinyl alcohol ) /Cellulose Nanocrystal Composite Membranes
摘要
Abstract
Poly ( vinyl alcohol ) ( PVA )/cellulose nanocrystal ( NCC ) composite membranes were used in the pervaporation separation of water-ethanol feed mixtures, and characterized by Fourier transform infrared spectroscopy( lTIR), scanning electron microscopy( SEM), differential scanning calorimetric(DSC) and thermogravimetry(TG). Atomic force microscope (AFM) was used to characterize the cellulose nanocrystal. The characterization results demonstrated that NCC displayed slender rods and dispersed homogeneously within the PVA matrix, which could be assigned to the hydrogen bonds formed between PVA and NCC. The DSC and TG analysis demonstrated that the nanocomposite membranes exhibited an increase in melting temperature and higher thermal resistance. With the addition of NCC, the mechanical properties of the nanocomposite membranes were improved. Moreover, the nanocomposite membranes had good pervaporation properties. Among all the prepared membranes, PVA/NCC nanocomposite membrane containing 2％ NCC exhibited the best separation factor, whose averaged separation factor was 347 for aqueous solution of ethanol(90％ ) at 80 ℃ and 24％ higher than that of crosslinked PVA membrane, but its permeation flux was 288 g/( m2 · h), 11％ lower than crosslinked PVA membrane.关键词
聚乙烯醇/渗透汽化/纳米纤维素/复合膜Key words
Poly(vinyl alcohol)/ Pervaporation/ Cellulose nanocrystal/ Composite membrane分类
化学化工引用本文复制引用
白露,张力平,曲萍,高源,秦竹,孙素琴..聚乙烯醇/纳米纤维素复合膜的渗透汽化性能及结构表征[J].高等学校化学学报,2011,32(4):984-989,6.基金项目
国家林业局"948"引进项目(批准号:2008-4-075)和国家"九七三"计划项目(批准号:2010CB732204)资助. （批准号:2008-4-075）
