【摘要】 随着膜分离技术在水处理中的应用与普及,性能优良的聚偏氟乙烯(PVDF)膜具有极大的发展前景,同时伴随的膜污染现象成为限制其广泛应用的关键因素。膜改性是通过一定的手段对膜基体或表面进行修改,能够改善膜的性能以延缓膜污染,提高膜的应用价值。氧化石墨烯(GO)由于含有单层碳原子的二维平面结构和各种含氧官能团,同时其比表面积大、强度高、耐热性好、亲水性强,成为水处理中的研究热点。采用GO对PVDF膜进行改性,能够提高膜的亲水性,增强膜的抗菌性和光催化性,缓解膜污染,是一种抑制膜污染的有效手段,从而提高了PVDF膜的工程应用价值。文章从PVDF膜的膜污染和GO的优良特性出发,介绍了GO改性PVDF膜的常用方法,总结了对膜抗污染性能的改善效果。更多还原

【Abstract】 With the development and popularization of membrane separation in the field of water treatment, polyvinylidene fluoride(PVDF) membrane has great development prospects due to its excellent performance. However, membrane fouling has become a critical limited factor for its application. Modified the substrate or surface of membrane with some method,membrane modification promote the performance effectively such as alleviate the membrane fouling and improve the applica-tion value of the membrane. With two dimensional planar structure and various oxygen-containing functional groups,grapheme oxide(GO) has the excellent characteristics of large specific surface area, high strength, good heat resistance and strong hydrophilicity, which is widely studied and applied in water treatment. The membrane modification by GO can improve the hydrophilicity, enhance the antibacterial and photolysis properties of PVDF membrane,and reduce the membrane fouling.It is an effective means to inhibit the membrane fouling by modified with GO, which improve the engineering value of PVDF membrane. The excellent properties of GO and pollution of PVDF membrane were mentioned. The common method of membrane modification with GO were reviewed. Besides, the effect of GO on the characterizations of the membrane were summarized.更多还原