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Preparation method of high-absorption composite

A composite material and high water absorption technology, which is applied in the field of preparation of high water absorption composite materials, can solve the problems of polyacrylic resin drying, difficult product performance, and difficulty in continuous production.

Active Publication Date: 2013-05-08
珠海得米新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the superabsorbent materials used in hygienic materials are mainly acrylic acid and its copolymer superabsorbent materials. The preparation methods used are mainly reversed phase suspension method and solution polymerization method. The reversed phase suspension method requires the use of organic solvents and production processes due to the existence of Complicated, difficult to achieve continuous production and other disadvantages are difficult to popularize. At present, solution polymerization method is mostly used, but the performance of products obtained by solution polymerization method is difficult to compare with that of reverse suspension method, especially the absorption speed and water retention required by hygienic materials. and pressurized water absorption often need to be post-treated to meet the requirements
In addition, the drying of polyacrylic acid resin prepared by solution polymerization is also a major technical problem.

Method used

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  • Preparation method of high-absorption composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Dissolve acrylamide monomer and polymer surfactant in distilled water, stir evenly, then add high white halloysite (whiteness greater than 90), stir at 30°C for 2 hours, filter to obtain modified angstrom Luoshi.

[0023] Among them, the acrylamide monomer is 6% of the halloysite mass, the polymer surfactant is polyvinylpyrrolidone (PVPK15), the dosage is 0.2% of the halloysite mass, and the distilled water consumption is 1000% of the halloysite mass.

[0024] (2) Dissolve acrylic acid in distilled water to make an acrylic acid solution with a mass concentration of 60%, add activated carbon according to 1% of the mass of acrylic acid monomer, stir at room temperature for 0.5 hours, and filter to remove the polymerization inhibitor. Sodium hydroxide is added in remaining filtrate and neutralized, obtains acrylic acid neutralized liquid,

[0025] Wherein, the ratio of the amount of substance of sodium hydroxide and acrylic acid monomer is 0.8;

[0026] (3) Add acryl...

Embodiment 2

[0031] (1) Dissolve acrylamide monomer and polymer surfactant in distilled water, stir evenly, then add high white halloysite (whiteness greater than 90), stir at 50°C for 1 hour, filter to obtain modified angstrom Luoshi.

[0032] Among them, the acrylamide monomer is 10% of the halloysite mass, the polymer surfactant is polyethylene glycol (PEG600), the dosage is 0.5% of the halloysite mass, and the distilled water consumption is 2000% of the halloysite mass.

[0033] (2) Dissolve acrylic acid in distilled water to make an acrylic acid solution with a mass concentration of 50%, add gas-phase silica according to 1% of the mass of acrylic acid monomer, stir at room temperature for 0.5 hours, and filter to remove the polymerization inhibitor. Add sodium hydroxide to the remaining clear liquid for neutralization to obtain acrylic acid neutralized liquid,

[0034] Wherein, the ratio of the amount of substance of sodium hydroxide and acrylic acid monomer is 0.7;

[0035] (3) Add...

Embodiment 3

[0040] (1) Dissolve acrylamide monomer and polymer surfactant in distilled water, stir evenly, then add tubular high-quality high-white halloysite (whiteness greater than 90), stir at 40°C for 1.5 hours, and filter to obtain Modified Halloysite.

[0041] Among them, the acrylamide monomer is 8% of the halloysite mass, the polymer surfactant is polyvinylpyrrolidone (PVPK12), the dosage is 0.3% of the halloysite mass, and the distilled water consumption is 1500% of the halloysite mass.

[0042] (2) Dissolve acrylic acid in distilled water to make an acrylic acid solution with a mass concentration of 55%, add activated carbon according to 1% of the mass of acrylic acid monomer, stir at room temperature for 0.5 hours, and filter to remove the polymerization inhibitor. Add sodium hydroxide to the remaining clear liquid for neutralization to obtain acrylic acid neutralized liquid,

[0043] Wherein, the ratio of the amount of substance of sodium hydroxide and acrylic acid monomer is...

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Abstract

The invention discloses a preparation method of a high-absorption composite. The preparation method comprises the following steps: 1) fully mixing acrylamide monomer, macromolecular surfactant, water and indianite, and filtering to obtain modified indianite; 2) preparing acrylic acid into water solution with mass concentration of 50-60%, adding an adsorbent, evenly mixing, filtering to remove a polymerization inhibitor, and neutralizing the filtrate by sodium hydroxide to obtain acrylic acid neutralization solution; and 3) adding the acrylamide monomer, the modified indianite, a crosslinking agent and an initiator at room temperature, fully mixing, increasing the temperature of the mixture to 70-85 DEG C for full reaction to obtain gel, and then drying, breaking, grinding and screening the gel. Compared with the high-absorption material prepared without addition of the indianite, the high-absorption composite prepared by adopting the method is obviously improved in absorption speed, water retaining capacity and pressurized absorbed capacity, can meet the requirement of sanitary materials, and is obviously shortened in drying time.

Description

technical field [0001] The invention relates to a preparation method of a superabsorbent composite material. Background technique [0002] Superabsorbent materials mainly refer to high-molecular superabsorbent resins, which refer to the multi-phase gel formed by the cross-linked network of polymers that are hydrophilic but insoluble in water absorb several times or even hundreds of times or thousands of times their own weight. system, widely used in women's sanitary napkins, baby diapers and other sanitary materials, drought resistance and water retention, agriculture, forestry and gardening, biomedical and other fields. All fields of industrial production and people's life. The main types of superabsorbent materials are polyacrylic acid and its copolymerized superabsorbent materials, polyacrylamide and its copolymerized superabsorbent materials, cellulose or starch grafted superabsorbent materials, polyvinyl alcohol superabsorbent materials, etc. Superabsorbent materials ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F220/56C08F2/44C08K9/04C08K3/34
Inventor 姚育忠傅培根何翰辉
Owner 珠海得米新材料有限公司