Year-end Sale % OFF 
Abstract
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−2 h−1. 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−1 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.
Highlights
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 results indicate that the blended membranes became more oleophobic as well as hydrophilic, which is a desirable property for oil/water filtration membrane
The unique property of the obtained novel membranes can be attributed to the blended additive polymer (AP) that has a triblock structure containing PVDF + hydrophilic intermediate segment (PEG) + oleophobic terminal segment within it
Summary
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. Yang et al reported a membrane fabricated by grafting hyperbranched poly(ethylene imine) onto polyvinylidene fluoride (PVDF) and polyacrylic acid-grafted PVDF blend membrane and showed the modified membrane surface exhibiting superhydrophilicity, and, in acidic conditions, superoleophobicity for oily wastewater treatment [29]. All these studies were limited on small flat membrane films for laboratory tests, which may face the challenge of scale-up needed for practical engineering applications. Both flat-sheet membrane and hollow fibre membrane samples were prepared and tested in the laboratory and the results indicated very good performance in the treatment of oily wastewater
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
