Effect of kinds of membrane materials on membrane fouling with BSA
Effect of kinds of membrane materials on membrane fouling with BSA
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DOI：
10.1016/j.memsci.2011.09.015
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发表时间：
2011-11-15
影响因子：
9.5
通讯作者：
Matsuyama, Hideto
中科院分区：
文献类型：
--
作者：
Hashino, Masatoshi;Hirami, Keisuke;Matsuyama, Hideto
采用非溶剂诱导相分离法分别以聚乙烯-乙烯醇共聚物（EVOH）、聚醚砜（PES）和聚偏氟乙烯（PVDF）为膜材料制备了三种膜。所得膜具有皮层和大孔结构，其截留分子量（MWCOs）和纯水渗透率分别为45-130 kDa和70- 100 L/（m（2）bar·h）。在BSA过滤实验中，EVOH膜在过滤60分钟后显示出高的相对渗透性，而PVDF膜显示出严重的渗透性下降。三种膜对BSA溶液的过滤结果不能用纯水透过率和初始分子量的差异来解释。采用石英晶体微天平耗散监测法（QCM-D）研究了BSA在聚合物上的吸附行为。通过QCM-D测量的聚合物上的BSA吸附量的顺序与过滤过程中BSA截留的顺序一致。PVDF表现出最高的吸附量和最刚性的吸附层，而EVOH表现出最低的吸附量和最软的吸附层。还使用原子力显微镜进行PVDF-BSA和BSA-BSA的粘附力测量。PVDF-BSA之间的相互作用远强于BSA-BSA之间的相互作用，表明膜污染是由于聚合物与BSA之间的物理化学作用而不是BSA与BSA之间在膜表面的物理化学作用。(C)2011 Elsevier B. V.保留所有权利。
Three kinds of membranes were prepared via non-solvent-induced phase separation using poly(ethylene-co-vinyl alcohol) (EVOH), polyether sulfone (PES) and poly(vinylidene fluoride) (PVDF), which are used widely membrane materials. The resulting membranes had structures with skin layers and macrovoids, and their molecular weight cut-offs (MWCOs) and pure water permeabilities were 45-130 kDa and 70-100L/(m(2) bar h), respectively. In BSA filtration experiments, the EVOH membrane showed high relative permeability after 60 min of filtration, while the PVDF membrane showed severe permeability decline. The results of filtrations for BSA solution by three membranes could not be explained by the difference of pure water permeabilities and initial MWCOs. The adsorption behaviors of BSA on the polymers were examined using a quartz crystal microbalance with the dissipation monitoring (QCM-D) method. The order of BSA adsorption amounts on polymers measured by QCM-D was in agreement with the order of BSA rejection during filtration. PVDF showed the highest adsorption amount and the most rigid adsorption layer, while EVOH showed the lowest adsorption amount and the softest adsorption layer. Adhesion force measurements of PVDF-BSA and BSA-BSA were also conducted using atomic force microscopy. The PVDF-BSA interaction was much stronger than the BSA-BSA interaction, indicating that membrane fouling resulted from the physicochemical interactions between polymers and BSA rather than that between BSA and BSA on the membrane surface. (C) 2011 Elsevier B.V. All rights reserved.