A kind of recycled membrane device and its manufacturing method
A technology for regenerating membranes and membrane devices, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of increasing operating costs, environmental pollution, etc., and achieve the effect of reducing operating costs and stable performance.
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[0022] The invention provides a method for preparing a regenerated membrane device, which comprises the following steps:
[0023] S1, providing a siloxane prepolymerization solution, and diluting the siloxane prepolymerization solution with a diluent;
[0024] S2, placing the original film device in the diluted siloxane prepolymer solution for immersion treatment; and
[0025] S3, performing a pre-crosslinking reaction on the impregnated original membrane device to obtain the regenerated membrane device.
[0026] In step S1, the diluent is used to dilute the siloxane prepolymer solution. The diluent is a mixture of water and ethanol. The mixing ratio of the water and ethanol is not limited. The volume ratio of the siloxane prepolymer liquid to the diluent is 1:4˜4:1.
[0027] The preparation method of described siloxane prepolymer liquid is as follows:
[0028] S11, adding polyalkoxysilane, functional monomer and initiator into an inert organic solvent to obtain a mixture...
Embodiment 1
[0048] (1) Add 3g of hydroxyethyl methacrylate, 2g of vinyltrimethoxysilane and 0.06g of benzoyl peroxide to 100mL of dehydrated ethanol in turn, pass through industrial nitrogen, and 200r at room temperature / min Mechanical stirring for 20min. Then turn on the heating and gradually increase the temperature to 65° C., and react with mechanical stirring at 200 r / min for 36 hours in an industrial nitrogen atmosphere. Turn off the heating, and obtain a prepolymerized liquid of hydrophilic hydroxyethyl methacrylate / vinyl trimethoxysilane copolymer after the temperature is sufficiently lowered. Add 40mL of deionized water to the obtained 100mL prepolymer solution to obtain the diluted prepolymer solution.
[0049] (2) The tubular membrane filter element replaced by the household water purifier is first pickled and then backwashed to obtain a clean filter element.
[0050] (3) Pour enough diluted prepolymer solution into the cleaned tubular membrane filter element, seal the inlet ...
Embodiment 2
[0054] (1) Add 4g of N-vinylpyrrolidone, 3g of vinyltriethoxysilane and 0.1g of azobisisoheptyl cyanide to 100mL of triethyl phosphate successively, feed high-purity nitrogen, and Mechanically stir at 250r / min for 30min at room temperature. Then turn on the heating and gradually increase the temperature to 80° C., and react with mechanical stirring at 250 r / min for 24 hours in an industrial nitrogen atmosphere. Turn off the heating, and obtain a hydrophilic N-vinylpyrrolidone / vinyltriethoxysilane copolymer prepolymer liquid after cooling down sufficiently. Add 100mL of 60% ethanol aqueous solution to the obtained 100mL prepolymer solution to obtain a diluted prepolymer solution.
[0055] (2) The polyvinylidene fluoride curtain membrane discarded after pollution is firstly subjected to alkali washing, acid washing and sodium hypochlorite oxidation, and then backwashed to obtain a clean curtain membrane.
[0056] (3) Soak the cleaned curtain film in a sufficient amount of dilu...
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