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CN-122011641-A - Antibacterial super absorbent resin and preparation method and application thereof

CN122011641ACN 122011641 ACN122011641 ACN 122011641ACN-122011641-A

Abstract

A bacteriostatic super absorbent resin and a preparation method and application thereof belong to the field of super absorbent resins. The preparation method of the antibacterial super absorbent resin comprises the following steps of S1, carrying out polymerization reaction on an acrylic monomer at 50-90 ℃ to obtain a primary super absorbent resin, adding a first antibacterial material in the polymerization reaction process, wherein the addition amount of the first antibacterial material is 4-6% of the mass of the acrylic monomer, the first antibacterial material contains polysaccharide substances and/or flavonoid substances, S2, mixing the primary super absorbent resin with a surface cross-linking agent and a second antibacterial material, and reacting at 100-200 ℃ to obtain the antibacterial super absorbent resin, and the addition amount of the second antibacterial material is 1.5-3.5% of the mass of the acrylic monomer, wherein the second antibacterial material comprises a hydroxyl-containing antibacterial agent. The antibacterial super absorbent resin has good antibacterial performance and water absorption performance.

Inventors

  • HU JUNHANG
  • WANG JIAN

Assignees

  • 万华化学集团股份有限公司

Dates

Publication Date
20260512
Application Date
20260104

Claims (10)

  1. 1. The preparation method of the antibacterial super absorbent resin is characterized by comprising the following steps of: s1, carrying out polymerization reaction on an acrylic acid monomer at 50-90 ℃ to obtain a primary high-hydroscopicity resin; In the polymerization reaction process, adding a first antibacterial material, wherein the addition amount of the first antibacterial material is 4-6% of the mass of the acrylic acid monomer, and the first antibacterial material contains polysaccharide substances and/or flavonoid substances; s2, mixing the primary high-hydroscopicity resin with a surface cross-linking agent and a second antibacterial material, and reacting at 100-200 ℃ to obtain the antibacterial high-hydroscopicity resin; the addition amount of the second antibacterial material is 1.5% -3.5% of the mass of the acrylic acid monomer, and the second antibacterial material comprises a hydroxyl-containing antibacterial agent.
  2. 2. The method for preparing the bacteriostatic superabsorbent resin according to claim 1, wherein the first bacteriostatic material comprises one or more of mugwort extract, purslane extract, baikal skullcap root extract, kuh-seng extract, mugwort extract, chestnut flower extract, okra extract, dahurian angelica root extract, moringa leaf extract, sweet potato stem and leaf extract, guava leaf extract, alfalfa extract and rutin extract, preferably mugwort extract and/or purslane extract.
  3. 3. The method for preparing the bacteriostatic superabsorbent resin according to claim 2, wherein the first bacteriostatic material comprises mugwort extract and purslane extract, and the mass ratio of mugwort extract to purslane extract is (1-25): 5.
  4. 4. The method for preparing the bacteriostatic superabsorbent resin according to claim 1, wherein the second bacteriostatic material contains organic acids and/or saponins; Optionally, the second antibacterial material comprises one or more of flos Lonicerae extract, citric acid, malic acid, glycyrrhetinic acid, mume fructus acid, herba Taraxaci extract, folium forsythiae extract, fructus Sapindi Mukouossi extract, fructus Gardeniae extract, radix astragali stem and leaf extract, folium Mori extract, fructus Momordicae Charantiae extract, rhizoma Bletillae extract, cordyceps militaris extract, herba Lophatheri extract, soybean protein, and xanthan gum; preferably one or more of flos Lonicerae extract, citric acid, malic acid, glycyrrhetinic acid, mume fructus acid, herba Taraxaci extract, fructus forsythiae leaf extract, and fructus Sapindi Mukouossi extract, more preferably flos Lonicerae extract.
  5. 5. The method for preparing a bacteriostatic superabsorbent resin according to any one of claims 1-4, wherein the step of preparing a primary superabsorbent resin by polymerizing an acrylic acid monomer comprises: S101, neutralizing an acrylic acid monomer with alkali liquor, adding a primary cross-linking agent and a first antibacterial material, mixing, adding an initiator, performing polymerization reaction to obtain a polymeric colloid, and granulating to obtain gel particles; s102, drying, grinding and screening the gel particles to obtain the primary super absorbent resin.
  6. 6. The method for producing a bacteriostatic superabsorbent resin according to claim 5, characterized in that at least one of the following conditions is satisfied: (1) The alkali liquor comprises one or more of sodium hydroxide solution, potassium hydroxide solution, sodium carbonate solution and sodium bicarbonate solution; (2) The primary crosslinking agent comprises one or more of polyethylene glycol diacrylate, pentaerythritol triallyl ether, polyethylene glycol diallyl ether, pentaerythritol triacrylate, pentaerythritol tetraacrylate, glycerol triacrylate, ethoxylated glycerol triallyl ether, N-dimethyl bisacrylamide and trimethylolpropane triacrylate, and is preferably polyethylene glycol diallyl ether; (3) The initiator comprises one or more of sodium persulfate, potassium persulfate, ammonium persulfate, sodium bisulfate, sodium thiosulfate, di-tert-butyl peroxide, cumene hydroperoxide, dibenzoyl peroxide, methyl ethyl ketone peroxide, or azodiiso Ding Mi, preferably sodium persulfate and/or potassium persulfate; (4) The addition amount of the initiator is 0.05-0.5wt% of the mass of the acrylic acid monomer; (5) The addition amount of the primary crosslinking agent is 0.05-0.5wt% of the mass of the acrylic acid monomer.
  7. 7. The method for producing a bacteriostatic superabsorbent resin according to any one of claims 1-4, characterized in that at least one of the following conditions is satisfied: (1) The surface cross-linking agent comprises one or more of polyalcohol, epoxy compound and metal salt inorganic compound; Optionally, the polyol comprises one or more of ethylene glycol, propylene glycol, glycerol, diethylene glycol, 1, 4-butanediol, pentanediol, or polyvinyl alcohol; optionally, the epoxy compound comprises one or more of ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether; optionally, the metal salt inorganic compound comprises one or more of kaolin, alumina, sodium sulfate, magnesium sulfate, aluminum sulfate, magnesium chloride, calcium chloride, aluminum chloride or zinc chloride; (2) The mass of the surface cross-linking agent is 0.5-5wt% of the mass of the primary super absorbent resin, preferably 0.8-2 wt%; (3) The particle size of the primary super absorbent resin is 10-800 mu m; (4) In S2, the reaction temperature is 120-160 ℃.
  8. 8. The method for producing a bacteriostatic superabsorbent resin according to claim 5, characterized in that at least one of the following conditions is satisfied: (1) In the step S1, the temperature of the polymerization reaction is 70-90 ℃, and the reaction time is 2-10min, preferably 5-8min; (2) The particle size of the gel particles is 1-10mm.
  9. 9. A bacteriostatic superabsorbent resin produced according to the production process of any one of claims 1 to 8.
  10. 10. Use of the bacteriostatic superabsorbent resin according to claim 9 in sanitary articles, medical dressings and agricultural water retention.

Description

Antibacterial super absorbent resin and preparation method and application thereof Technical Field The invention relates to the field of super absorbent resins, in particular to a bacteriostatic super absorbent resin and a preparation method and application thereof. Background The super absorbent resin (SAP) is a three-dimensional network structure functional polymer material containing strong hydrophilic groups such as carboxyl, hydroxyl and the like, and can absorb water with hundreds to thousands of times of the self weight and firmly hold the water. Since the development of 60 s of the 20 th century, the global productivity of the product is over 500 ten thousand tons/year, wherein the polyacrylic resin accounts for over 80 percent, and the product is widely applied to the fields of sanitary products (baby diapers, sanitary napkins, adult diapers and the like), agricultural water retention, medical dressings and the like. However, conventional SAP has serious challenges in applications in the sanitary field, such as the tendency of bacteria to grow in a moist, warm environment, leading to off-flavors and health risks, and the lack of active bacteriostatic ability of conventional superabsorbent resin products. In order to solve the above problems, the prior art mainly improves the bacteriostasis by introducing a bacteriostat. However, although the antibacterial property of the antibacterial super absorbent resin prepared by the conventional preparation method is improved to a certain extent, the water absorption rate of the super absorbent resin is reduced, and the application of the resin is affected. Disclosure of Invention The invention provides a bacteriostatic super absorbent resin and a preparation method and application thereof, and aims to solve the problem that the bacteriostatic performance and the water absorption performance of the bacteriostatic super absorbent resin prepared by the prior art are difficult to be compatible. In a first aspect, the application provides a preparation method of a bacteriostatic super absorbent resin, which comprises the following steps: s1, carrying out polymerization reaction on an acrylic acid monomer at 50-90 ℃ to obtain a primary high-hydroscopicity resin; In the polymerization reaction process, adding a first antibacterial material, wherein the addition amount of the first antibacterial material is 4-6% of the mass of the acrylic acid monomer, and the first antibacterial material contains polysaccharide substances and/or flavonoid substances; s2, mixing the primary high-hydroscopicity resin with a surface cross-linking agent and a second antibacterial material, and reacting at 100-200 ℃ to obtain the antibacterial high-hydroscopicity resin; the addition amount of the second antibacterial material is 1.5% -3.5% of the mass of the acrylic acid monomer, and the second antibacterial material comprises a hydroxyl-containing antibacterial agent. In a possible embodiment, the first antibacterial material comprises one or more of a mugwort extract, a purslane extract, a baikal skullcap root extract, a kuh-seng extract, a mugwort extract, a chestnut flower extract, an okra extract, a dahurian angelica root extract, a moringa leaf extract, a sweet potato stem and leaf extract, a guava leaf extract, a alfalfa extract, a rutin extract, preferably a mugwort extract and/or a purslane extract. In a possible embodiment, the first bacteriostatic material comprises mugwort extract and purslane extract in a mass ratio of (1-25): 5, which may be, for example, 1:5, 5:5, 10:5, 15:5, 20:5 or 25:5, preferably (3-5): 5. In one possible embodiment, the second bacteriostatic material contains organic acids and/or saponins; in one possible embodiment, the second antibacterial material comprises one or more of honeysuckle extract, citric acid, malic acid, glycyrrhetinic acid, dark plum acid, dandelion extract, weeping forsythia leaf extract, soapberry extract, gardenia extract, astragalus mongholicus stem and leaf extract, mulberry leaf extract, balsam pear extract, bletilla striata extract, cordyceps militaris extract, lophatherum gracile extract, soy protein and xanthan gum; preferably one or more of flos Lonicerae extract, citric acid, malic acid, glycyrrhetinic acid, mume fructus acid, herba Taraxaci extract, fructus forsythiae leaf extract, and fructus Sapindi Mukouossi extract, more preferably flos Lonicerae extract. The first antibacterial material and the second antibacterial material are natural plant extracts. The natural plant extract is preferably selected as a bacteriostatic material, thereby conforming to the development trend of safety and environmental protection. In one possible embodiment, the step of polymerizing with an acrylic monomer to produce a primary superabsorbent resin comprises: S101, neutralizing an acrylic acid monomer with alkali liquor, adding a primary cross-linking agent and a first antibacterial material, mixing, adding an initiator, performing polym