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CN-122011281-A - Universal high-absorption resin material and preparation method thereof

CN122011281ACN 122011281 ACN122011281 ACN 122011281ACN-122011281-A

Abstract

The invention belongs to the technical field of high polymer absorption materials, and the material comprises, by mass, 5-30% of natural polysaccharide derivatives, 30-60% of ionic acrylic monomers, 0.1-3% of reversible dynamic crosslinking monomers, 1-10% of organic porous reinforcing phases, 0.05-1% of initiating systems and a proper amount of water. The material has an organic/inorganic double-network structure inside, wherein natural polysaccharide chains interact with inorganic layered silicate through hydrogen bonds to form a physical cross-linked network. The general high-absorption resin material is prepared by taking natural polysaccharide derivatives, ionic acrylic monomers and the like as raw materials, constructing an organic-inorganic dual-network structure, introducing a reversible dynamic crosslinking mechanism and adopting a water phase low-temperature one-step polymerization process. The material has high absorption performance and mechanical strength, excellent salt tolerance and cycle stability, stable performance in different pH environments and good biodegradability.

Inventors

  • YANG YANG
  • YANG ZHILIANG
  • YAO MEIQIN
  • YANG HAO
  • HAN DANDAN

Assignees

  • 山东昊月新材料股份有限公司

Dates

Publication Date
20260512
Application Date
20251217

Claims (10)

  1. 1. The universal high-absorption resin material is characterized by comprising the following raw materials in percentage by mass: 5-30% of natural polysaccharide derivative, 30-60% of ionic acrylic monomer, 0.1-3% of reversible dynamic crosslinking monomer, 1-10% of organic porous reinforcing phase, 0.05-1% of initiating system and a proper amount of water.
  2. 2. The high-absorption resin material according to claim 1, wherein the ionic acrylic monomer comprises a mixed system of sodium acrylate and sodium 2-acrylamide-2-methylpropanesulfonate, and the molar ratio of the mixed system is 1 (0.05-0.3).
  3. 3. The super absorbent resin material according to claim 1 or 2, wherein the dynamic crosslinking monomer is diacetyl hydrazine acrylate, isophthalaldehyde derivative or boric acid ester compound.
  4. 4. A super absorbent resin material according to any one of claims 1 to 3, wherein the material has an organic/inorganic double network structure in which natural polysaccharide chains interact with inorganic layered silicate through hydrogen bonds to form a physical cross-linked network, and acrylic acid chain segments form a chemical cross-linked network, thereby having both high absorptivity and mechanical strength.
  5. 5. A method for preparing a high-absorption resin material according to any one of claims 1 to 4, comprising the steps of (1) dissolving a natural polysaccharide derivative in water to form a first solution, (2) adding an ionic acrylic monomer and an inorganic porous reinforcing phase into the first solution, and stirring uniformly to form a composite system; (3) Adding a reversible dynamic crosslinking monomer and an initiation system, and carrying out aqueous phase polymerization reaction for 2-6 hours at 40-70 ℃; (4) And dehydrating, drying and crushing the obtained gel to obtain the high-absorption resin material.
  6. 6. The method of claim 5, wherein the initiation system is a potassium persulfate and ascorbic acid composite initiation system with a mass ratio of 1 (0.2-1) to realize low-temperature free radical polymerization.
  7. 7. The process according to claim 5 or 6, wherein the reaction of step (3) is carried out under an inert atmosphere to reduce the oxygen inhibition effect and increase the degree of polymerization.
  8. 8. The super absorbent resin material according to any one of claims 1 to 4, wherein the water absorption rate is 800 to 1500 times its own weight, the water absorption rate of 0.9% physiological saline is 100 to 300 times its own weight, and the water absorption retention rate after 10 absorption cycles is not lower than 85% of the initial value.
  9. 9. The super absorbent resin material according to any one of claims 1 to 8, which is suitable for sanitary articles, agricultural water-retaining agents, industrial absorbent pads, medical dressings and heavy metal ion adsorption.
  10. 10. The application of claim 9, wherein the super absorbent resin material can maintain stable water absorption performance under different ionic strength environments by regulating and controlling dynamic crosslinking proportion, and has universality and environmental adaptability.

Description

Universal high-absorption resin material and preparation method thereof Technical Field The invention relates to the technical field of high-molecular water-absorbing materials, in particular to a general-purpose high-absorbing resin material and a preparation method thereof. Background The high-absorption resin is used as a three-dimensional net-shaped functional polymer material, can quickly absorb hundreds of times of water of the self weight, is not easy to get rid of liquid, and is widely applied to the fields of sanitary articles, agriculture, medical use, industrial environmental protection and the like. Along with the expansion of market demands and diversification of applications, the conventional SAP has a plurality of technical bottlenecks, and is difficult to meet high-performance, multifunctional, green and sustainable demands. The petroleum-based acrylic resin has mature process and high pure water absorption rate, but has suddenly reduced performance, poor biodegradability and insufficient recycling performance in a high-salt environment, the natural polymer modified resin has renewable raw materials, insufficient mechanical strength and limited improvement of salt tolerance, the inorganic filler composite resin has improved mechanical strength, but contradiction between the water absorption rate and the mechanical strength still exists, and the filler has poor dispersibility and does not improve the cycle stability at all. The urgent need of the current industry breaks through the technical bottleneck, realizes the multi-performance collaborative promotion, adapts to different environments, is green and sustainable, and has simple preparation process. Therefore, the invention provides a novel high-absorption resin material and a preparation method thereof, wherein natural polysaccharide derivatives, ionic acrylic monomers and the like are used as raw materials, an organic-inorganic double-network structure is constructed, a reversible dynamic crosslinking mechanism is introduced, a water phase low-temperature one-step polymerization process is adopted, the synergistic promotion of high water absorption multiplying power, high mechanical strength, high cycle stability, excellent salt tolerance and environmental adaptability is realized, the raw materials are partially sourced from renewable resources, the environment-friendly development trend is met, and a new direction is provided for the development and application of high-performance general water absorbent resin. Disclosure of Invention The core of the invention aims to overcome the technical bottlenecks of the existing high-absorption resin in the aspects of performance balance, environmental adaptability, green sustainability and preparation process. In order to achieve the above purpose, the present invention provides the following technical solutions: compared with the prior art, the invention has the beneficial effects that: The universal high-absorption resin material is characterized by comprising the following raw materials in percentage by mass: 5-30% of natural polysaccharide derivative, 30-60% of ionic acrylic monomer, 0.1-3% of reversible dynamic crosslinking monomer, 1-10% of organic porous reinforcing phase, 0.05-1% of initiating system and a proper amount of water. Preferably, the ionic acrylic monomer comprises a mixed system of sodium acrylate and 2-acrylamide-2-methylpropanesulfonate, and the molar ratio of the mixed system is 1 (0.05-0.3). Preferably, the dynamic crosslinking monomer is diacetyl hydrazine acrylate, isophthalaldehyde derivative or boric acid ester compound. Preferably, the material has an organic/inorganic double-network structure inside, wherein natural polysaccharide chains interact with inorganic layered silicate through hydrogen bonds to form a physical cross-linked network, and acrylic acid chain segments form a chemical cross-linked network, so that the material has high absorptivity and mechanical strength. The preparation process of high absorption resin material includes the steps of (1) dissolving natural polysaccharide derivative in water to form first solution, (2) adding ionic acrylic monomer and inorganic porous reinforcing phase into the first solution and stirring to form composite system; (3) Adding a reversible dynamic crosslinking monomer and an initiation system, and carrying out aqueous phase polymerization reaction for 2-6 hours at 40-70 ℃; (4) And dehydrating, drying and crushing the obtained gel to obtain the high-absorption resin material. Preferably, the initiation system is a potassium persulfate and ascorbic acid composite initiation system with a mass ratio of 1 (0.2-1) so as to realize low-temperature free radical polymerization. Preferably, the reaction of step (3) is carried out under an inert atmosphere to reduce the oxygen inhibition effect and to increase the degree of polymerization. A high-absorption resin material has a pure water absorption rate of 800-1500 times i