Preparation method and application of bacteriostatic and deodorant SAP (super absorbent polymer)

Abstract

The invention provides a bacteriostatic and deodorant SAP (super absorbent polymer). The bacteriostatic and deodorant SAP is prepared through steps as follows: a primary crosslinking agent and a primary dispersing agent are added to an acrylic acid/acrylate mixed solution which is prepared from a basic compound by neutralizing an acrylic monomer solution, the mixed solution is uniformly stirred, an antibacterial agent is added, uniform stirring is continued, the temperature is increased to 35-70 DEG C, an initiating agent is added, polymerization is performed, and a colloidal SAP is obtained;the colloidal SAP is granulated and dried in sequence and is subjected to surface treatment with a composite antibacterial crosslinking agent at the temperature of 110-180 DEG C, and accordingly, theshell-core type SAP with a three-dimensional crosslinked network structure is obtained. The antibacterial agent is one or two of amino acid metal salt ion chelate and chitosan metal salt ion chelate.The bacteriostatic and deodorant SAP is applied to hygroscopic hygienic products, has remarkable bacteriostatic and deodorant properties, is low in cost and has great benefit, and the raw materials are available.

Description

technical field [0001] The invention belongs to the research field of functional superabsorbent resins, in particular to an antibacterial and deodorizing superabsorbent resin and its application field. Background technique [0002] Super absorbent polymer (SAP) is a general term for polymers with high water absorption and water retention properties. In foreign countries, in the early 1950s, Goodrich Corporation of the United States developed cross-linked polyacrylic acid resins, and then Russell et al., the Northern Research Center of the United States Department of Agriculture, began to study the grafting technology of starch and acrylonitrile in 1961; by 1978, Sanyo, Japan Chemical Industry Co., Ltd. develops and industrializes the production of starch-grafted polyacrylic acid copolymerized superabsorbent resin. In China, the research on superabsorbent resin started in the early 1980s. Due to objective factors such as late start and short development time, the innovation ...

AI Technical Summary

Problems solved by technology

[0015] Looking at the known technologies in this field, it mainly achieves the antibacterial effect by adding nano-silver ions or quaternary ammonium salt ions, but the above-mentioned method is applied to personal daily necessities for women and children, except that there is a relatively large safety hazard, and it is harmful to the user's body. In addition to causing harm, using Ag+ directly as antibacterial ions also has the following defects: (1) Ag+ is easily reduced to simple silver and turns black, which affects the application of silver ion antibacterial agents in light-colored products, and has poor discoloration resistance; (2) Ag2O precipitation is easy to form in an alkaline environment, and the slow-release performance is poor, which affects the antibacterial persistence; (3) when Ag+ encounters Cl- items or environments, it is easy to form AgCl precipitation, that is, silver precipitation, which leads to its antibacterial performance. Even failure, poor salt resistance, (4) low silver loading, limited antibacterial effect

[0016] Based on the technical problems existing in the prior art, the present invention provides antibacterial and deodorizing superabsorbent resins containing amino acids, chitosan chelated nano-silver, and nano-zinc chelated antibacterial agents and a preparation method thereof, providing a The superabsorbent resin with slow-release antibacterial function solves the existing technical problems such as easy discoloration of metal ions, especially silver ion antibacterial agents, poor slow-release performance and salt tolerance, and low silver loading.

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