痕量灌溉中聚四氟乙烯膜抗污染性能實驗研究
發(fā)布時間:2018-12-15 07:03
【摘要】:痕量灌溉是近幾年來發(fā)展的一種全新的基于膜過濾技術的節(jié)水灌溉方法,其核心過濾元件聚四氟乙烯膜具有優(yōu)異的機械性能、耐老化性能、化學穩(wěn)定性能等優(yōu)勢,但其本身的疏水性容易導致過濾膜發(fā)生污染堵塞,使得痕量灌溉系統(tǒng)不能長期穩(wěn)定運行。以聚四氟乙烯膜為研究對象,對其進行多巴胺親水性改性和抗腐殖酸溶液污染性能實驗研究。研究結果表明,改性后的復合膜較未改性的初始膜具有較好的親水性;多巴胺聚合物牢固地吸附在復合膜表面;復合膜較初始膜的抗污染性能大大的改善。這將在極大程度上提高聚四氟乙烯膜的壽命和痕量灌溉系統(tǒng)的運行可靠性,為痕量灌溉技術的發(fā)展與應用提供了一定的技術指導。
[Abstract]:Trace irrigation is a new water-saving irrigation method based on membrane filtration technology developed in recent years. The core filtration element of PTFE membrane has excellent mechanical properties, aging resistance, chemical stability and other advantages. However, its hydrophobicity can lead to fouling and blockage of filtration membrane, which makes trace irrigation system unable to operate stably for a long time. The hydrophilic modification of polytetrafluoroethylene (PTFE) membrane and its resistance to humic acid solution pollution were studied. The results show that the modified composite membrane has better hydrophilicity than the unmodified initial membrane, the dopamine polymer is firmly adsorbed on the surface of the composite membrane, and the antifouling performance of the composite membrane is greatly improved compared with the initial membrane. This will greatly improve the life of PTFE film and the reliability of trace irrigation system, and provide some technical guidance for the development and application of trace irrigation technology.
【作者單位】: 文華學院機械與電氣工程學部;華中科技大學材料科學與工程學院;
【基金】:科技部“十二五”科技支撐項目“東北四省區(qū)節(jié)水增糧高效灌溉技術研究與規(guī)模化示范”(2014BAD12B00)
【分類號】:S275;TQ051.893
本文編號:2380190
[Abstract]:Trace irrigation is a new water-saving irrigation method based on membrane filtration technology developed in recent years. The core filtration element of PTFE membrane has excellent mechanical properties, aging resistance, chemical stability and other advantages. However, its hydrophobicity can lead to fouling and blockage of filtration membrane, which makes trace irrigation system unable to operate stably for a long time. The hydrophilic modification of polytetrafluoroethylene (PTFE) membrane and its resistance to humic acid solution pollution were studied. The results show that the modified composite membrane has better hydrophilicity than the unmodified initial membrane, the dopamine polymer is firmly adsorbed on the surface of the composite membrane, and the antifouling performance of the composite membrane is greatly improved compared with the initial membrane. This will greatly improve the life of PTFE film and the reliability of trace irrigation system, and provide some technical guidance for the development and application of trace irrigation technology.
【作者單位】: 文華學院機械與電氣工程學部;華中科技大學材料科學與工程學院;
【基金】:科技部“十二五”科技支撐項目“東北四省區(qū)節(jié)水增糧高效灌溉技術研究與規(guī)模化示范”(2014BAD12B00)
【分類號】:S275;TQ051.893
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