Structure and properties of bisphenol S copoly(phthalazinone ether sulfone)hollow fiber membrane
The hollow fiber membrane was prepared by dry-wet phase conversion method with bisphenol S copoly(phthalazinone ether sulfone)as the membrane material and polyethylene glycol(PEG2000)as the additive.The relationship between polymer content,additive content,drafting rate,air gap distance and bore fluid composition on membrane structure and property were investigated.SEM was used to observe the microscopic morphology of hollow fiber membranes,and its properties were studied.The results showed that an increase in polymer concentration and additive content would lead to an increase in the apparent viscosity of the casting solution,a gradual increase in the proportion of sponge pores,and a decrease in water flux.The increase in take-up speed and air gap distance leads to a decreasing trend in the water flux of the membrane.When the drafting rate is 9 m/min and the air gap distance is 10 cm,the membrane has good separation performance,with a water flux of 106 L/(m2·h),a bovine serum albumin(BSA)retention rate of 99.8％,and a clearance rate of 52.4％for urea.
bisphenol S copoly(phthalazinone ether sulfone)dry-wet phase inversionstructure and per-formance
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