A kind of polytetrafluoroethylene membrane and its hydrophilic treatment method and application
A technology of polytetrafluoroethylene membrane and hydrophilic treatment, which is applied in the direction of osmosis/dialysis water/sewage treatment, chemical instruments and methods, membranes, etc. Problems with water stability, disappearance, etc.
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Embodiment 1
[0021] This embodiment provides a kind of hydrophilic treatment method of polytetrafluoroethylene film, it comprises the following steps:
[0022] S1, the hydrophilic fluorine-containing polymer resin and the epoxy polymer are placed in the solvent according to the molar ratio of 5.5:1 to carry out the crosslinking reaction, and the polymer solution having a mass concentration of 3% is obtained; wherein, the ring of the epoxy polymer Oxygen equivalent is 384, specifically can adopt the commercially available DOW620 of Dow Chemical; Hydrophilic fluoropolymer resin is the VOH polymkeric substance in the prior art, and its preparation method can refer to existing published U.S. Patent 5,130,024; Solvent is methyl alcohol and Ethanol was mixed in a volume ratio of 4:1.
[0023] S2. Dip coating the polytetrafluoroethylene film with the above polymer solution and dry it to obtain a hydrophilic treated polytetrafluoroethylene film. Wherein, the polytetrafluoroethylene film can adopt...
Embodiment 2
[0025] This embodiment provides a kind of hydrophilic treatment method of polytetrafluoroethylene film, it comprises the following steps:
[0026] S1, the hydrophilic fluorine-containing polymer resin and the epoxy polymer are placed in the solvent according to the molar ratio of 5.5:1 to carry out the crosslinking reaction to obtain a polymer solution with a mass concentration of 2%; wherein, the ring of the epoxy polymer Oxygen equivalent is 576, specifically can adopt the commercially available DOW661 of Dow Chemical; Hydrophilic fluoropolymer resin is the VOH polymkeric substance in the prior art, and its preparation method can refer to existing published U.S. Patent 5,130,024; Solvent is methyl alcohol and Ethanol was mixed in a volume ratio of 4:1.
[0027] S2. Dip coating the polytetrafluoroethylene film with the above polymer solution and dry it to obtain a hydrophilic treated polytetrafluoroethylene film. Wherein, the polytetrafluoroethylene film can adopt commercial...
Embodiment 3
[0029] This embodiment provides a kind of hydrophilic treatment method of polytetrafluoroethylene film, it comprises the following steps:
[0030] S1, the hydrophilic fluorine-containing polymer resin and the epoxy polymer are placed in the solvent according to the molar ratio of 4:1 for cross-linking reaction, and the polymer solution with a mass concentration of 1% is obtained; wherein, the ring of the epoxy polymer The oxygen equivalent is 300; the hydrophilic fluoropolymer resin is a VOH polymer in the prior art, and its preparation method can refer to the existing published U.S. Patent 5,130,024; the solvent is methanol and ethanol mixed according to a volume ratio of 3:1 mixture.
[0031] S2. Dip coating the polytetrafluoroethylene film with the above polymer solution and dry it to obtain a hydrophilic treated polytetrafluoroethylene film. Wherein, the polytetrafluoroethylene film can adopt commercially available common biaxially stretched polytetrafluoroethylene film. ...
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