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首页> 外文期刊>Journal of Applied Polymer Science >Development of antifouling ultrafiltration PES membranes for concentration of hemicellulose
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Development of antifouling ultrafiltration PES membranes for concentration of hemicellulose

机译：消化超滤PES膜浓度的开发浓度半纤维素

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A new approach for one-stage facile membrane modification during non-solvent induced phase separation (NIPS)-process is proposed. The novelty of this study is that cheap and commercially available anionic high molecular polyacrylamide-based flocculant (AHMPF) is applied for the first time as an additive to coagulation bath (CB). The series of polyethersulfone membranes were prepared using 0.05-0.3 wt% AHMPF aqueous solution as CB at different temperatures (25-50 degrees C) via NIPS. The effect of AHMPF concentration on the structure, composition and hydrophilicity of membranes was investigated. The separation and antifouling performance were evaluated during filtration of bovine serum albumin (BSA) solution and thermomechanical pulp mills process water (ThMP) in order to concentrate hemicellulose. The successful immobilization of AHMPF into the structure of membranes selective layer (not bottom layer) was confirmed by FTIR spectroscopy. It was established that despite the similar rejection of hemicellulose (88.8-93%) and lignin (20-21.4), modified membranes demonstrate 3-8 times higher flux and 2 times higher FRR (43.8% for reference membrane and 86.5% for modified one) in ThMP ultrafiltration. The developed membrane was found to be highly efficient in hemicellulose concentration and purification in pulp industry.
机译：提出了一种非溶剂诱导相分离（NIPS）过程中一步简易膜改性的新方法。本研究的创新之处在于，首次将廉价且市售的阴离子高分子聚丙烯酰胺基絮凝剂（AHMPF）用作凝固浴（CB）的添加剂。采用0.05-0.3 wt%AHMPF水溶液作为CB，在不同温度（25-50℃）下通过NIPS制备了系列聚醚砜膜。研究了AHMPF浓度对膜结构、组成和亲水性的影响。在过滤牛血清白蛋白（BSA）溶液和热机械制浆厂工艺水（ThMP）以浓缩半纤维素的过程中，评估了分离和防污性能。FTIR光谱证实AHMPF成功固定在膜选择层（而非底层）的结构中。研究表明，尽管半纤维素（88.8-93%）和木质素（20-21.4%）的截留率相似，但改性膜在ThMP超滤膜中的通量和FRR分别高出3-8倍和2倍（参比膜43.8%和改性膜86.5%）。该膜在制浆工业中具有高效的半纤维素浓缩和纯化性能。

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