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Advanced Scientific Research Journal
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ISSN Online:3079-2169
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Research on the Preparation of Modified Polyacrylic Acid Superabsorbent Resin and Its Potential Application in Fruit Preservation in Combination with Chinese Herbal Medicine Composites
- Authors: Zhao Ke, Deng Xueyao, Shi Xin
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Information:
School of Chemistry and Chemical Engineering, Chongqing University of Science, Chongqing
- Keywords: Superabsorbent Resin; Salt Resistance; Biodegradation; Fruit Preservation
- Abstract: In order to enhance the water absorption capacity and degradation performance of acrylic acid superabsorbent resin (PAA), this paper used 2-acrylamido-2-methylpropanesulfonic acid (AMPS) and naturally degradable macromolecular carboxymethyl cellulose (CMC) as modifiers and adopted the aqueous solution polymerization method to prepare modified polyacrylic acid (PAA) superabsorbent resin. The results showed that when the content of acrylic acid was 21%, and the contents of AMPS, CMC, cross-linking agent and initiator were 20%, 1.8%, 0.02% and 2% of the mass of AA respectively, the water absorption capacity of the prepared PAA superabsorbent resin in deionized water increased from 483 g/g before modification to 875 g/g, and the water absorption capacity in physiological saline was 238 g/g. The degradation rate of the modified PAA in cellulase was 64.8%. It can be seen that the modification with CMC and AMPS can improve the water absorption, salt resistance and degradation performance of PAA resin. Meanwhile, the composite material of modified PAA superabsorbent resin and Chinese herbal medicine powder can prolong the shelf life of fruits and vegetables. The research results can provide a reference for the further research of fruit preservatives and a new idea for the expanded application of superabsorbent resins.
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