hydrophobic pvdf hollow fiber membrane synthesis for direct contact membrane distillation DCMDدومین همایش ملی غشا و فرایندهای غشایی
Polyvinylidene fluoride (PVDF) hollow fibers membrane were prepared by the dry\wet jet spinning phase inversion technique. For synthesis of this membrane, the methanol was used as a non–solvent for producing more porous fibers. The Membrane was fabricated at optimum condition; polymer concentration (16% wt), methanol concentration (4% wt) air gap (10 cm), bore fluid rate (10 ml\min). The prepared membrane was characterized through SEM observation and contact angel test. The fiber prepared at this condition has 0.31 μm of mean pore size, 81% of overall porosity and 115º of surface contact angel. Membrane Distillation (MD) process is mainly investigates for desalination, waste water treatment and other applications which water is the major component present in the feed solution to be separates. In this work, hollow fibers were tested for desalination by direct contact membrane distillation and the permeation flux was improved from 12.8 kg\m2.hr (without methanol) to 16.3 kg\m2.hr (with methanol) and 99.3% salt rejection of feed solution (1 molNaCl\lit and temperature of 80 ºC) was obtained<\div>
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