Oxidation-resistant modification of polypropylene hollow fiber membranes and application of membrane distillation
Currently,polypropylene hollow fiber membranes(PP-HFM)are widely used in water purification,sewage pretreatment,pharmaceutical purification separation,beverage and wine concentration,and industrial waste liquid recycling.To improve the oxidation resistance and service life of polypropylene membranes,in this study,it was conducted to prepare high-performance PP-HFMs by adding antioxidants and modifying the purification process.This work specifically explores the effect of optimal antioxidant addition on membrane oxidation resistance.In the oxidation experiment over 36 h,the addition of 0.4％antioxidant 1076 can obviously increase the water contact angle of polypropylene hollow fiber membrane by 67％,while the tensile strength is reduced by 10％and the maximum elongation is reduced by 15.4％.In the membrane distillation experiment,the rejection of 0.3％antioxidant 1010 PP-HFM membrane can still retain 99.7％of Al3+after 30 h operation.In conclusion,the addition of antioxidant improves the retention stability and service life of PP-HFMs in the membrane distillation ap-plication.
NETL
NSTL
万方数据
维普
