Shen S S, Liu K P, Yang J J, Li Y, Bai R B, Zhou X J
Center for Separation and Purification Materials and Technologies, Suzhou University of Science and Technology, 1 Kerui Road, Suzhou 215009, People's Republic of China.
Suzhou Key Laboratory of Separation and Purification Materials and Technologies, Suzhou University of Science and Technology, 1 Kerui Road, Suzhou 215009, People's Republic of China.
R Soc Open Sci. 2018 May 9;5(5):171979. doi: 10.1098/rsos.171979. eCollection 2018 May.
A hollow fibre membrane was fabricated by blending polyvinylidene fluoride (PVDF) with a triblock copolymer additive polymer that has both hydrophilic and oleophobic surface properties. The novel membrane was characterized and examined for oil/water separation under various system conditions, including different cross-flow rate, feed temperature, trans-membrane pressure, and its rejection and cleaning efficiency, etc. By applying the membrane into the filtration of synthesized oil/water emulsion, the membrane constantly achieved an oil rejection rate of above 99%, with a relatively constant permeate flux varied in the range of 68.9-59.0 l m h. More importantly, the fouling of the used membrane can be easily removed by simple water flushing. The membrane also demonstrated a wide adaptability for different types of real oily wastewater, even at very high feed oil concentration (approx. 115 000 mg l in terms of chemical oxygen demand (COM)). Hence, the novel triblock copolymer additive-modified PVDF membrane can have a great prospect in the continuing effort to expand the engineering application of polymeric membranes for oily wastewater treatment.
通过将聚偏氟乙烯（PVDF）与具有亲水和疏油表面特性的三嵌段共聚物添加剂聚合物共混，制备了一种中空纤维膜。对该新型膜进行了表征，并在各种系统条件下，包括不同的错流速率、进料温度、跨膜压力及其截留率和清洗效率等，对其进行了油/水分离测试。通过将该膜应用于合成油/水乳液的过滤，该膜始终实现了99%以上的除油率，渗透通量相对稳定，在68.9 - 59.0 l m h范围内变化。更重要的是，使用过的膜的污垢可以通过简单的水冲洗轻松去除。该膜对不同类型的实际含油废水也表现出广泛的适应性，即使在进料油浓度非常高（以化学需氧量（COM）计约为115 000 mg l）的情况下也是如此。因此，新型三嵌段共聚物添加剂改性的PVDF膜在不断努力扩大聚合物膜在含油废水处理工程应用方面具有广阔前景。
