Synthetic method of anti-compression and anti-bacterial super absorbent polymer for physiology

Abstract

The invention relates to a super absorbent polymer for physiology, in particular to an anti-compression and anti-bacterial super absorbent polymer still with high water absorbency under compression and with natural anti-bacterial property. The super absorbent polymer adopts the following technical scheme: taking polyvinyl alcohol with the polymer long chain rich in hydroxy as the interpenetrating polymer network (IPN), carboxymethyl chitosan with bioactivity and natural antibacterial property as the graft polymer and acrylate as the main comonomer, being combined with a cross-linking agent with molecular chains different in length, adopting the three-stage complex initiation system and realizing interpenetrating of polyvinyl alcohol and grafting of carboxymethyl chitosan by way of aqueous solution radical copolymerization to prepare the super absorbent resins with regular granularity, uniform crosslinking and less residual monomers. The invention develops multi-component composite surface treatment solution to carry out surface treatment on the super absorbent resins, thus further reducing the residual monomers, forming gradient crosslinking on the surfaces of the super absorbent resins and finally preparing the anti-compression and anti-bacterial super absorbent polymer for physiology. The super absorbent polymer is white without yellow spots, has regular granularity, inadherent surface, good liquidity, high absorption rate and absorption, excellent filtration property and less residual monomers and is against compression and tolerant to salt and free of gel plugging.

Description

technical field [0001] The invention relates to a superabsorbent SAP (Super Absorbent Polymer), in particular to the synthesis of a superabsorbent that still has a high water absorption rate under pressure and has natural antibacterial properties, and is a special absorbent in the field of physiology and hygiene , especially suitable for baby diapers, adult incontinence tablets, women's sanitary napkins and other sanitary products that have high requirements for liquid absorption speed and volume. Background technique [0002] At present, super absorbents are widely used in physiological hygiene. The absorbents for physiological hygiene mainly refer to absorbent materials for human body fluids (including blood, urine, sweat, etc.), such as paper diapers (or diapers), incontinence tablets, Sweat-absorbing underwear, sanitary napkins, napkins, rags, mattresses, food utensil pads, paper towels, cotton wool, bandages, surgical gowns and gloves, etc. In the past, natural water-a...

AI Technical Summary

Problems solved by technology

[0009] (5) SAP must be cheap

[0013] There are certain deficiencies in the above-mentioned super absorbent, or the water absorption rate under pressure is low, or the liquid absorption speed is not fast enough, or the residual monomer content is high, or the surface of the water absorbent contains heavy metal ions, or The problem of gel clogging has not been completely solved. In short, the surface treatment process of water-absorbent resin is not yet mature, and there is room for further improvement in the selection of surface treatment liquid components and treatment conditions. The performance of super-absorbents can be further optimized and improved.