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The copolymer of poly (vinylidene fluoride) grafting poly (N-isopropylacrylamide) (PVDF-g-PNIPAAm) was synthesized and its flat sheet membranes were prepared via phase inversion method with N, N-dimethylformamide (DMF) as solvent and ethanol aqueous solutions as coagulation bath. The membrane formation process and mechanism were studied by the phase diagram (thermodynamics) and the ultrasonic time-domain...
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