高性能リバースオスモス脱塩のためのより弾力的なポリエステル膜

Yujian Yao¹, Pingxia Zhang², Fei Sun¹

¹Key Laboratory of New Membrane Materials, Ministry of Industry and Information Technology, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.

Science (New York, N.Y.)

|April 26, 2024

まとめ

研究者らは,塩分除去のための新しいポリエステル膜を開発し,伝統的なポリアミド膜と比較して,優れた塩素耐性,ボロン拒絶性,および汚れ防止を提供します.

科学分野:

材料科学
化学工学
環境科学

背景:

薄膜複合逆オスモス膜は脱塩に不可欠ですが,塩素耐性や汚れなどの制限に直面しています.
現在の標準であるポリアミド膜は,低ボロンの排斥と汚れとスケールへの感受性を含む欠点を示しています.

研究の目的:

ポリアミド膜の限界を解決するために
脱塩と水浄化の性能を向上した新しいポリエステル薄膜複合膜の設計と合成.

主な方法:

ポリエステル膜の分子設計と合成
3,5-ジヒドロキシ-4-メチルベンゾ酸をトリメソイル塩化物と反応させ,ポリエステル膜を形成する.
水浸透性,塩分排斥,ボロン排斥,塩素耐性を含む膜性能の特徴.

主要な成果:

この新しいポリエステル膜は水に浸透し,塩化ナトリウムとボロンの高い拒絶率を示した.
膜は塩素に対する完全な耐性を示し,ポリアミド膜よりも有意な改善でした.
ポリエステル膜の超滑らかな,低エネルギー表面は,汚染と鉱物のスケーリングを効果的に防止しました.

結論:

開発されたポリエステル膜は,海水淡化のための従来のポリアミド膜に有望な代替品を提供します.
塩素耐性や汚れ防止などの強化された特性により,前処理プロセスを簡素化できます.
水と塩の選択性をさらに最適化することで,これらのポリエステル膜は,浄水におけるポリアミド膜の優位性に挑戦することができます.

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