【摘要】 以水吸收空气中的氧为例,从膜的微孔性、疏水性、传质效率、膜污染和价格等五个方面对市售国产聚丙烯和聚偏氟乙烯两种微孔中空纤维膜在膜吸收过程中的性能进行了评估,并分析了造成这两种膜性能差异的原因.评价结果表明,聚丙烯微孔膜具有疏水性好、氧传质系数大、抗污染能力强和价格便宜等优良性能,更适宜应用于膜吸收过程.更多还原

【Abstract】 By means of the oxygen mass transfer from air to water through the microporous membrane,the performance of polypropylene(PP) and polyvinylidenedifluoride(PVDF) membranes used in membrane absorption was experimentally evaluated on porosity,hydrophobicity,mass transfer efficient,membrane fouling and cost.The theoretical analysis was also given in order to explain those performance differences of two membranes in this paper.The evaluation results indicated that the PP membrane possessed the characteristics of good hydrophobic behavior,large oxygen mass transfer coefficient,better resistance to membrane fouling and low cost.Therefore,the PP membrane is highly suitable to the membrane absorption processes.更多还原