A kind of anti-pollution and antibacterial PTFE oil-water separation membrane and preparation method thereof
An oil-water separation membrane and anti-pollution technology, which is applied in the fields of semi-permeable membrane separation, chemical instruments and methods, osmosis/dialysis water/sewage treatment, etc., can solve the problems that the membrane material cannot be endowed with anti-organic pollution and anti-biological pollution at the same time, Achieve excellent hydrophilic performance and antibacterial performance, easy operation process, and expand the effect of application range
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Embodiment 1
[0044] (1) Synthesis of acrylamide thiolactone:
[0045] A mixed solution of DL-homocysteine thiolactone hydrochloride (7.68 g, 50 mmol), 200 mL of ethyl acetate and water (1:1 by volume) was added to a three-necked flask and placed in an ice-water bath Then, sodium bicarbonate (18.9 g, 225 mmol) was added and stirred for 30 min; then acryloyl chloride (10.1 g, 110 mmol) was added dropwise and stirred for 30 min; 200mL of 1mol / L sodium chloride solution was washed and extracted three times with ethyl acetate (200mL / time), and the organic layer was taken each time; finally, the organic layer liquid obtained from the extraction was dried with anhydrous sodium sulfate, rotary evaporated, and the obtained crude The product was crystallized and purified in dichloromethane to obtain acrylamide thiolactone (TlaAm) as a white solid;
[0046] (2) Synthesis of P(DMAEMA-co-TlaAm) copolymer:
[0047] Dimethylaminoethyl methacrylate (DMAEMA) (6.90 g, 43.9 mmol), acrylamide thiolactone ...
Embodiment 2
[0056] The antifouling and antibacterial oil-water separation membrane is prepared based on the copolymer P (DMAEMA-co-TlaAm) prepared in Example 1, and its specific preparation steps are as follows:
[0057] Step 1. The polytetrafluoroethylene membrane was ultrasonically cleaned with ethanol and acetone for 15min respectively; then immersed in a solution of 2g / L dopamine hydrochloride / Tris (pH=8.5, 50mM), and placed on a shaking table at room temperature Shake at a constant speed for 4 hours; then, rinse it with deionized water for three times, and place it on a shaker in pure water for 10 minutes; take it out, and place it in a vacuum at 40 °C to dry to constant weight, and the deposited film is PTFE-PDA- 4;
[0058] Step 2: Dissolve glucosamine (0.0216g, 0.12mmol) and copolymer P(DMAEMA-co-TlaAm) (1.446g, 0.06mmol) in 50mL of Tris solution, and then immerse the deposited film prepared in step 1 into The solution was placed on a shaker and shaken at room temperature for 24 ...
Embodiment 3
[0061] The antifouling and antibacterial oil-water separation membrane is prepared based on the copolymer P (DMAEMA-co-TlaAm) prepared in Example 1, and its specific preparation steps are as follows:
[0062] Step 1. The polytetrafluoroethylene membrane was ultrasonically cleaned with ethanol and acetone for 15min respectively; then immersed in a solution of 2g / L dopamine hydrochloride / Tris (pH=8.5, 50mM), and placed on a shaking table at room temperature Shake at a constant speed for 12h; then, rinse it with deionized water for three times, and place it on a shaker in pure water for 10min; take it out, and place it in a vacuum at 40°C to dry to constant weight to obtain a deposited film of PTFE-PDA- 12;
[0063] Step 2: Dissolve glucosamine (0.0216g, 0.12mmol) and copolymer P(DMAEMA-co-TlaAm) (1.446g, 0.06mmol) in 50mL of Tris solution, and then immerse the deposited film prepared in step 1 into The solution was placed on a shaker and shaken at room temperature for 24 hours;...
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