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Zwitterionic polymers showing upper critical solution temperature behavior as draw solutes for forward osmosis

机译:两性离子聚合物显示出上部临界溶液温度行为,如向前渗透溶质

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摘要

We synthesized the zwitterionic homopolymer polysulfobetaine (PBET), which shows upper critical solution temperature (UCST) characteristics, via free radical polymerization in order to investigate its suitability as a draw solute for the forward osmosis (FO) process. The FO and recovery properties of PBET were systematically investigated. The UCST characteristics of the monomer sulfobetaine (BET) were not confirmed, while the UCST of PBET was confirmed to be approximately 40 degrees C. This result suggests that PBET can be easily recovered from aqueous solutions by cooling them to below the UCST. In an active layer facing feed solution (AL-FS) system containing 20 wt% PBET at a temperature of 50 degrees C, the water flux and reverse solute flux of PBET were found to be approximately 3.22 LMH and 0.36 gMH, respectively. Thus, we investigated the suitability of homopolymers having UCST characteristics as draw solutes for the FO process for the first time.
机译:我们合成了两性离子均聚物聚硫代替肽(PBET),其显示了通过自由基聚合的上临界溶液温度(UCST)特性,以便研究其作为前渗透(FO)工艺的绘制溶质的适用性。 系统地研究了PBET的FO和回收性质。 未确认单体磺基因(BET)的UCST特征,而PBET的UCST被证实约为40℃。该结果表明,通过将它们冷却至UCST以下,可以容易地从水溶液中回收PBET。 在面对含有20wt%PBET的饲料溶液(Al-Fs)系统的有源层中,在50℃的温度下,发现PBET的水通量和反向溶质通量分别为约3.22lmH和0.36gmH。 因此,我们研究了具有UCST特征的均聚物的适用性,因为首次为FO工艺吸附溶质。

著录项

  • 来源
    《RSC Advances》 |2017年第89期|共7页
  • 作者

    Ju Changha; Kang Hyo;

  • 作者单位

    Dong A Univ Dept Chem Engn 37 Nakdong Daero 50Beon Gil Busan 604714 South Korea;

    Dong A Univ Dept Chem Engn 37 Nakdong Daero 50Beon Gil Busan 604714 South Korea;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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