CAJ | 학술논문

以低分子量聚乙二醇（PEG）为添加剂，二甲基乙酰胺（DMAC）为溶剂，采用纺丝及浸没沉淀相转化法制备了聚砜(PSU)中空纤维膜，考察了PEG含量和空气间隙对膜结构及性能的影响。实验结果表明，随着PEG含量的增加，PSU铸膜溶液的黏度增大，所得膜结构从指状孔向海绵孔转变，膜变得致密，膜的孔隙率和纯水通量降低，牛血清白蛋白(BSA)截留率和拉伸强度提高；但当PEG含量继续增加时，尽管孔隙率继续下降，但膜截面孔径增大，膜的纯水通量反而有所回升，相应的BSA截留率下降。当空气间隙较短时，膜的结构基本没有变化，但当空气间隙达到7 cm时，膜截面出现指状孔，膜变得相对疏松；随空气间隙的增加，膜的纯水通量上升，BSA截留率总体下降。当PEG与DMAc的质量比为35/45，空气间隙为5 cm时，膜的综合性能最好，其纯水通量为129.0 L/(m2· h)，BSA截留率为96.8%，孔隙率为75.5%，拉伸强度为5.01 MPa。
이저분자량취을이순（PEG）위첨가제，이갑기을선알（DMAC）위용제，채용방사급침몰침정상전화법제비료취풍(PSU)중공섬유막，고찰료PEG함량화공기간극대막결구급성능적영향。실험결과표명，수착PEG함량적증가，PSU주막용액적점도증대，소득막결구종지상공향해면공전변，막변득치밀，막적공극솔화순수통량강저，우혈청백단백(BSA)절류솔화랍신강도제고；단당PEG함량계속증가시，진관공극솔계속하강，단막절면공경증대，막적순수통량반이유소회승，상응적BSA절류솔하강。당공기간극교단시，막적결구기본몰유변화，단당공기간극체도7 cm시，막절면출현지상공，막변득상대소송；수공기간극적증가，막적순수통량상승，BSA절류솔총체하강。당PEG여DMAc적질량비위35/45，공기간극위5 cm시，막적종합성능최호，기순수통량위129.0 L/(m2· h)，BSA절류솔위96.8%，공극솔위75.5%，랍신강도위5.01 MPa。
Taking polyethylene glycol (PEG) with low molecular weight as additive and dimethyl acetamide (DMAc) as solution,polysulfone hollow fiber membrane was prepared via spinning and immersion precipitation phase inversion method. The effects of PEG content and air gap on structures and performances of the membrane were investigated. The results show that with the PEG content increasing,the viscosity of the polysulfone casting solution raises,the cross-section morphology of the membrane changes from the typical finger hole to sponge hole structure and the membranes become dense,which result that the porosity and pure water flux decrease,meanwhile,the retention rate of bovine serum albumin (BSA) and tensile strength increase. But with the PEG content continued increasing,although the the porosity continues to decrease,the membrane holes become larger,so the pure water flux of the membrane is rebounded and the retention rate of BSA decreases. Else,when the air gap is short,the structure of the membrane doesn't change,but when the air gap is 7 cm,the finger holes occur and the membrane become loose. With the air gap increasing,the pure water flux increases and the retention rate of BSA is reduced overall. When the mass ratio of PEG and DMAC is 35/45 and the air gap length is 5 cm,the membrane has best comprehensive properties,the casting solution viscosity is 9.84 Pa · s, the pure water flux was 129.0 L/(m2 · h),the retention rate of BSA reaches 96.8%, the tensile strength and porosity were 5.01 MPa and 75.5%respectively.