Integrally skinned nano-cellular crosslinked asymmetric thin films infused with PEO-PPO-PEO block copolymer/ZnO-NPs for desalination using sea salt
Integrally skinned nano-cellular crosslinked asymmetric thin films infused with PEO-PPO-PEO block copolymer/ZnO-NPs for desalination using sea salt
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DOI：
10.1016/j.matchemphys.2016.09.022
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发表时间：
2016-11
影响因子：
4.6
通讯作者：
A. Sabir;A. Sabir;W. Falath;W. Falath;K. Jacob;Muhammad Imtiaz Shafiq;Nafisa Gull;Atif Islam
中科院分区：
文献类型：
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作者：
A. Sabir;A. Sabir;W. Falath;W. Falath;K. Jacob;Muhammad Imtiaz Shafiq;Nafisa Gull;Atif Islam
通过在双酚A二缩水甘油醚（DGEBA）交联的聚乙烯醇（PVA）纳米泡孔结构中引入PEO-PPO-PEO嵌段共聚物（Pluronic F127）和氧化锌纳米粒子（ZnO-NPs），制备了用于纳滤（NF）的完整结皮非对称（伊萨）薄膜。利用自制的NF组件对膜的渗透性能、脱盐性能和耐氯性能进行了评价。ISA 4（0. 08 wt% ZnO-NPs/Pluronic F127 6wt%）被认为是最佳的薄膜，与单层交联薄膜相比，其表现出高得多的渗透通量（1.96m3/m2/天）和盐截留率（98.7%）。加速条件下的薄膜氯暴露试验表明，ISA 4在氯化水中的稳定性得到有效提高。采用ATR-FTIR、SEM、AFM和接触角分析对薄膜进行了表征。这些表征决定了聚合物链与其他组分、形态、形貌和润湿性之间的成功相互作用。结果发现，与纳米孔交联薄膜相比，薄膜表面变得更光滑、更亲水并且表面粗糙度降低。SEM显微照片分析显示ISA 4薄膜的平均孔径<100 nm，没有任何斑驳的表面。
Integrally skinned asymmetric (ISA) thin films, for nanofiltration (NF), were fabricated by the infusion of PEO-PPO-PEO block copolymer (Pluronic F127) and zinc oxide nanoparticles (ZnO-NPs) in bisphenol A diglycidyl ether (DGEBA) crosslinked poly (vinyl alcohol) nanocellular structure. The thin film permeation, salt rejection and chlorine resistance performance were evaluated by using indigenously fabricated NF assembly. ISA4 (0.08 wt% ZnO-NPs/Pluronic F127 6 wt%) was considered as an optimal thin film that exhibited a much higher permeation flux (1.96m3/m2/day) and salt rejection (98.7%) compared to the single layer crosslinked thin film. The chlorine exposure tests of thin films under accelerated conditions indicated that the stability of ISA4 was enhanced effectively in chlorinated water. Thin films were characterized by ATR-FTIR, SEM, AFM, and contact angle analysis. These characterizations determine the successful interactions between polymer chains and other components, morphology, topography and wettability. It was found that the thin film surface became smoother, more hydrophilic and reduced surface roughness compared to the nanocellular crosslinked thin film. The SEM micrograph analysis showed average pore size <100 nm in ISA4 thin film without any mottled surface.