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yexuqing木蟲之王 (文學泰斗)
太陽系系主任
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恢復力更強的聚酯膜助力高性能反滲透海水淡化
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恢復力更強的聚酯膜助力高性能反滲透海水淡化 ▲ 作者：YUJIAN YAO, PINGXIA ZHANG, FEI SUN, WEN ZHANG, MENG LI, GANG SHA, ET AL. ▲ 鏈接： https://www.science.org/doi/10.1126/science.adk0632 ▲ 摘要： 近半個世紀以來，薄膜復合反滲透膜一直是海水淡化和水凈化的黃金標準技術(shù)。聚酰胺膜具有優(yōu)異的透水性和拒鹽性，但也有耐氯性差、結(jié)垢傾向高和拒硼率低的缺點。 研究組通過分子設(shè)計聚酯膜復合反滲透膜來解決這些問題，使用共溶劑輔助界面聚合法使3,5-二羥基-4-甲基苯甲酸與均苯三甲酰氯反應(yīng)。這種聚酯膜具有優(yōu)異的透水性，對氯化鈉和硼高截留，以及完全耐氯。 與聚酰胺膜相比，該膜的超光滑、低能量表面還可防止污垢和礦物結(jié)垢。通過進一步優(yōu)化水鹽選擇性，該膜有望超越聚酰胺膜，為大大減少海水淡化的預處理步驟提供新途徑。 ▲ Abstract： Thin-film composite reverse osmosis membranes have remained the gold standard technology for desalination and water purification for nearly half a century. Polyamide films offer excellent water permeability and salt rejection but also suffer from poor chlorine resistance, high fouling propensity, and low boron rejection. We addressed these issues by molecularly designing a polyester thin-film composite reverse osmosis membrane using co-solvent–assisted interfacial polymerization to react 3,5-dihydroxy-4-methylbenzoic acid with trimesoyl chloride. This polyester membrane exhibits substantial water permeability, high rejection for sodium chloride and boron, and complete resistance toward chlorine. The ultrasmooth, low-energy surface of the membrane also prevents fouling and mineral scaling compared with polyamide membranes. These membranes could increasingly challenge polyamide membranes by further optimizing water-salt selectivity, offering a path to considerably reducing pretreatment steps in desalination. 人工智能Artificial Intelligence Fusion of memristor and digital compute-in-memory processing for energy-efficient edge computing |
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