Production technology of metal resistant reverse osmosis membrane for drinking water

Abstract

The invention provides a production technology of a metal resistant reverse osmosis membrane for drinking water, and solves the technical problems of too simple structure, inapplicability to drinkingwater filtration, poor filtering effect and the like in existing membrane materials. The production technology of the metal resistant reverse osmosis membrane for drinking water includes the steps of:a. pouring 9 parts of polysulfone, 5 parts of polyphenylene sulfone, 12 parts of an organic pore forming agent and 48 parts of dimethylacetamide into a mixer to prepare a membrane casting solution; b. coating the surface of a non-woven fabric support layer with the membrane casting solution evenly by a coating machine, and then subjecting the product to coagulating bath for gelling into a membrane so as to obtain a polysulfone base membrane layer; c. pouring 20-25 parts of a solvent, 1-3 parts of an active agent, 1-1.5 parts of a release agent, 0.2-0.8 part of a cross-linking agent, 0.1-0.2 part of a curing agent, 0.4-0.6 part of an antistatic agent and 0.8-1.2 parts of an antibacterial agent into the mixer to prepare a coating solution; d. coating the surface of the polysulfone base membrane layer with the coating solution evenly by the coating machine to obtain a finished membrane; and e. rolling the finished membrane. The production technology provided by the invention has the advantage of high production efficiency.

Description

technical field [0001] The invention relates to a production process of a metal-resistant reverse osmosis membrane for drinking water. Background technique [0002] The principle of reverse osmosis technology is to separate these substances from water based on the fact that other substances cannot pass through the semi-permeable membrane under the action of the osmotic pressure higher than the solution. The membrane pore size of the reverse osmosis membrane is very small, so it can effectively remove dissolved salts, microorganisms, colloids, organic matter, etc. in water. [0003] After searching, for example, Chinese patent literature discloses a membrane material for purifying sewage and its preparation method [application number: 201610716011.9; publication number: CN 106336578A]. This diaphragm material for purifying sewage is characterized in that its raw materials include by weight: 175 parts of ethylene-propylene rubber, 20-30 parts of Zhongchao wear-resistant carbo...

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Problems solved by technology

[0004] Although the membrane material disclosed in this patent has high mechanical strength, the structure of the membrane material is too simple to be suitable for drinking water filtration, and the filtering effect is poor. Therefore, a metal-resistant reverse osmosis membrane for drinking water is designed production process is necessary

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