Siloxane-containing vinyl chloride copolymer, preparation method of the siloxane-containing vinyl chloride copolymer, battery division plate prepared from the siloxane-containing vinyl chloride copolymer, and manufacturing method of the battery division plate

Abstract

The invention discloses a siloxane-containing vinyl chloride copolymer, a preparation method of the siloxane-containing vinyl chloride copolymer, a battery division plate prepared from the siloxane-containing vinyl chloride copolymer, and a manufacturing method of the battery division plate. The siloxane-containing vinyl chloride copolymer has molecular weight of 20000 to 50000 and is shown in the structural formula (1). The battery division plate comprises a porous non-woven fabric. Two copolymer film layers are respectively coated on surfaces of two sides of the porous non-woven fabric. Apertures are uniformly and densely arranged on the surfaces of the copolymer film layers and an average diameter of the apertures is in a range of 0.1 to 10 microns. The copolymer film layers comprise the siloxane-containing vinyl chloride copolymer or mainly comprise the siloxane-containing vinyl chloride copolymer. The battery division plate prepared from the siloxane-containing vinyl chloride copolymer has good strength and hydrophily. The battery division plate has good wettability, high acid adsorption capacity, good flexibility, good foldability, large mechanical strength and good penetration resistance, is suitable for tightening assembling, and can effectively improve use performances of a storage battery.

Description

technical field [0001] The invention relates to a siloxane-containing vinyl chloride copolymer, a preparation method thereof, a storage battery separator and a preparation method thereof, in particular to a new nanocomposite material of PVC-g-POSS, its preparation method and its use A storage battery separator made of the material and a manufacturing method thereof. Background technique [0002] Inorganic-organic nanocomposites usually combine the advantages of inorganic nanoparticles and organic polymers, and thus become a new type of material with great development prospects in today's material science. Polyhedral oligomeric silsesquioxane (POSS) is different from silica, silicone and other fillers, it is an inorganic-organic doped compound with nanometer size and cage structure. The organic functional groups of POSS make it compatible with polymers and organic monomers in the size of nanostructures, and at the same time, cage-type POSS can be added to materials through p...

AI Technical Summary

Problems solved by technology

The disadvantage of this method of making battery separators is to glue the parts together two by two: the adhesive needs to be applied during the production process, however, the dosage of the adhesive used proves to be problematic, on the one hand it is applied too much Less, so that the bonded fluff is easy to cause falling off during use. On the other hand, if the amount of adhesive applied is too large, the adhesive may penetrate through the fluff, which will cause adhesive contamination At the same time, too much adhesive will increase the resistance of the separator, affect the working efficiency of the battery, and cause damage to the battery

The disadvantage of this method of making battery separators is that rubber separators or polyethylene separators are used as linings, resulting in insufficient overall strength and poor toughness of the separators, and there are many small circles with a diameter of 2 to 3.5mm on the linings. After the battery is charged and discharged for a long time, it will cause dendrite growth on the separator, which will easily cause a short circuit of the battery and seriously affect the performance and life of the battery.

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