Method for persistent hydrophilic modification of polypropylene porous membrane surface
A technology of porous membrane and polypropylene, which is applied in the field of permanent hydrophilic modification of the surface of polypropylene porous membrane, can solve the problems of extruding PEG molecular chains out of the surface of PET, poor compatibility, etc., and achieves a simple treatment method and process. , Reliable processing effect
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Embodiment 1
[0027] 1) Precleaning the polypropylene hollow fiber membrane with acetone for 24 hours;
[0028] 2) Dissolve octadecenoic acid polyethylene glycol (n=9) monoester in xylene / cyclohexanone (weight ratio 80 / 20) mixed solvent to form a 10wt% amphiphilic molecule solution, and add 0.8wt% hydroquinone and 0.65wt% benzoin butyl ether;
[0029] 3) immerse the polypropylene porous membrane pretreated in step 1 into the amphiphilic molecule solution prepared in step 2 at a temperature of 70° C. for surface treatment, and the treatment time is 360 minutes;
[0030] 4) Take out the polypropylene porous membrane, blot dry the solution adsorbed on the surface, and irradiate for 2 hours under a 30W ultraviolet lamp;
[0031] 5) Vacuum extracting the swelling agent for 48 hours, and then washing the amphiphilic molecules simply adsorbed on the surface of the polypropylene porous membrane with water. In the long-term water immersion environment, the hydrophilic properties of the surface of ...
Embodiment 2
[0033] 1) Precleaning the polypropylene hollow fiber membrane with acetone for 24 hours;
[0034] 2) Dissolve octadecenoic acid polyethylene glycol (n=9) monoester in carbon tetrachloride to form a 10wt% amphiphilic molecule solution, while adding 0.8wt% hydroquinone and 2wt% benzoin diethyl ether;
[0035] 3) immerse the polypropylene porous membrane pretreated in step 1 into the amphiphilic molecule solution prepared in step 2 at a temperature of 70° C. for surface treatment, and the treatment time is 720 minutes;
[0036] 4) Take out the polypropylene porous membrane, blot dry the solution adsorbed on the surface, and irradiate it under a 30W ultraviolet lamp for 1 hour;
[0037] 5) Vacuum extracting the swelling agent for 48 hours, and then washing the amphiphilic molecules simply adsorbed on the surface of the polypropylene porous membrane with water. In the long-term water immersion environment, the hydrophilic properties of the surface of the modified polypropylene po...
Embodiment 3
[0039] 1) Precleaning the polypropylene hollow fiber membrane with acetone for 24 hours;
[0040] 2) Dissolve octadecenoic acid polyethylene glycol (n=9) monoester in 1,2-dichloroethane to form a 5wt% amphiphilic molecule solution, while adding 0.1wt% terephthalic acid Phenol and 0.2wt% benzoin butyl ether;
[0041] 3) immerse the polypropylene porous membrane pretreated in step 1 into the amphiphilic molecule solution prepared in step 2 at a temperature of 60° C. for surface treatment, and the treatment time is 720 minutes;
[0042] 4) Take out the polypropylene porous membrane, blot dry the solution adsorbed on the surface, and irradiate for 3 hours under a 30W ultraviolet lamp;
[0043] 5) Vacuum extracting the swelling agent for 24 hours, and then washing the amphiphilic molecules simply adsorbed on the surface of the polypropylene porous membrane with water. In the long-term water immersion environment, the hydrophilic properties of the surface of the modified polypropy...
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