High-temperature-resistant modified filter membrane

Abstract

The invention discloses a high-temperature-resistant modified filter membrane which comprises a polypropylene base membrane and modified membranes, the upper surface and the lower surface of the polypropylene base membrane are each coated with a layer of modified membrane, and each modified membrane comprises the following raw materials in parts by weight: 10-20 parts of polypropylene base membrane and 10-20 parts of modified membrane. Comprising 50-60 parts of polyvinylidene chloride, 5-6 parts of an ethylene-alkyl acrylate copolymer, 5-7 parts of benzophenone, 1-3 parts of butyl lithium, 2-4 parts of 4-hydroxymethylpiperidine, 0.5-1 part of a heat stabilizer, 1-3 parts of a dispersant, 5-7 parts of an adhesive, 0.5-1 part of an inorganic filler and 2.5-3 parts of a plasticizer, and the heat stabilizer is a mixture of one or more of barium stearate, lithium stearate and epoxy stearate. Polyvinylidene chloride has symmetry performance and has high flame retardance, corrosion resistance and biodegradation resistance, the ethylene-alkyl acrylate copolymer is used for modifying, and the flexibility, cold resistance and heat resistance of the modified polyvinylidene chloride are improved.

Description

technical field [0001] The invention relates to the technical field of filter membrane preparation, in particular to a high temperature resistant modified filter membrane. Background technique [0002] The filter membrane can separate the solute in the solution. With the continuous advancement of science and technology, the modification of the membrane has become the main means of enhancing the performance of the membrane in all aspects. The main methods of modification are physical and chemical methods. By introducing other Polymer resin to enhance the overall performance and make up for defects. [0003] Polyvinylidene chloride has symmetrical properties, strong flame retardancy, corrosion resistance and biodegradation resistance, and has a wide range of applications in the field of filter membrane preparation. Poor, after the film is prepared, it needs to be dried and dried. During the drying and drying process, due to the high temperature, the polyvinylidene chloride wi...

AI Technical Summary

Problems solved by technology

[0003] Polyvinylidene chloride has symmetrical properties, strong flame retardancy, corrosion resistance and biodegradation resistance, and is widely used in the field of membrane preparation. However, the disadvantage of polyvinylidene chloride is that its thermal stability is very poor. Poor, after the film is prepared, it needs to be dried and dried. During the drying and drying process, due to the high temperature, polyvinylidene chloride will decompose, which will reduce the tensile strength and thermal stability of the product, and It can also release hydrogen chloride gas, which will not only affect the quality of the membrane, but also cause harm to the human body and the environment. Therefore, it is particularly important to invent a high-temperature-resistant modified filter membrane and its preparation process.

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