Antibacterial and environmentally friendly chitosan/polyvinyl alcohol blend membranes for air filtration
Antibacterial and environmentally friendly chitosan/polyvinyl alcohol blend membranes for air filtration
复制标题
抗菌环保空气过滤用壳聚糖/聚乙烯醇共混膜
DOI：
10.1016/j.carbpol.2018.06.090
复制
发表时间：
2018-10-15
影响因子：
11.2
通讯作者：
He, Benqiao
中科院分区：
文献类型：
--
作者：
Wang, Zhen;Yan, Feng;He, Benqiao
采用非溶剂诱导相分离法(NIPS)制备了一种抗菌环保的壳聚糖(CS)/聚乙烯醇(PVA)空气过滤共混膜。对所得CS/PVA膜的化学结构、热行为、形态、力学性能和表面电荷进行了表征。结果表明，由于CS和PVA之间存在分子间氢键，CS和PVA是相容的。当共混膜的CS浓度大于20wt.%时，共混膜呈无表层的梯度连通的多孔结构。对于CS浓度为30wt.%、厚度为37µm的CS/PVA复合膜，在面速为5.3 cm S(-1)的条件下，空气过滤效率和压降分别为95.59%和633.5 Pa.所获得的空气过滤性能主要归因于对膜表面的直接截留。共混膜对大肠杆菌和金黄色葡萄球菌的抑菌率分别达到94.8%和91.3%。
An antibacterial and environmentally friendly chitosan (CS) /polyvinyl alcohol (PVA) blend membrane for air filtration was prepared via nonsolvent induced phase separation (NIPS) method. The chemical structure, thermal behavior, morphology, mechanical property and surface charge of the resultant CS/PVA membranes were characterized. Results showed that CS and PVA were miscible due to the intermolecular hydrogen bond between them. The blend membrane obtained from over 20 wt.% CS concentration exhibited a gradient interconnected porous structure without skin layer. The air filtration efficiency and pressure drop obtained from CS/PVA membrane with 30 wt.% CS concentration and the thickness of 37 mu m under a face velocity of 5.3 cm s(-1) were 95.59% and 633.5 Pa, respectively. The performance of air filtration obtained is mainly attributed to the direct interception of membrane surface. Further, the antibacterial rate of the blend membrane was up to 94.8% for E. coli and 91.3% for S. aureus.