Selective removal of polyphenols and brown colour in apple juices using PES/PVP membranes in a single ultrafiltration process
Selective removal of polyphenols and brown colour in apple juices using PES/PVP membranes in a single ultrafiltration process
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DOI：
10.1016/s1383-5866(00)00142-8
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发表时间：
2001-03-01
影响因子：
8.6
通讯作者：
Nijhuis, HH
中科院分区：
文献类型：
--
作者：
Borneman, Z;Gökmen, V;Nijhuis, HH
多酚是负责混浊形成和布朗宁在存储过程中的明确的苹果汁和浓缩物，可以选择性地通过超滤过程中使用定制的膜的聚醚砜（PES）和聚乙烯吡咯烷酮（PVP）。结果与商业再生醋酸纤维素膜进行了比较。通过改变聚合物组合物制备具有不同孔径的PES/PVP膜。这项研究表明，由于PVP的吸附能力，定制的膜比商业再生纤维素膜更有效地减少苹果汁中的多酚和黄棕色素。通量也显著更高。对于由22.5wt.%的聚乙二醇制备的膜，从模型溶液中的多酚去除率高达40%。聚合物溶液，PES/PVP比率为3.5。初始吸附和通量值可以很容易地恢复再生膜在0.1 M NaOH。(C)2001 Elsevier Science B. V.保留所有权利。
Polyphenols that are responsible for haze formation and browning during storage of clear apple juice and concentrates could be selectively removed by an ultrafiltration process using tailor-made membranes out of polyethersulfone (PES) and polyvinylpyrrolidone (PVP). The results were compared with commercial regenerated cellulose acetate membranes. The PES/PVP-membranes were prepared with different pore sizes by varying the polymer composition. This study has shown that, due to the adsorption capacity of PVP, the tailor-made membranes were more effective than the commercial regenerated cellulose membranes for the reduction of both polyphenols and yellowish brown pigments in apple juices. The flux was also significantly higher. Polyphenol removal rates from the model solution were up to 40% for a membrane prepared from a 22.5 wt.% polymer solution with a PES/PVP ratio of 3.5. Initial adsorption and flux values could be restored easily by regenerating the membranes in 0.1 M NaOH. (C) 2001 Elsevier Science B.V. All rights reserved.