Preparation method for natural high-antibacterial-property water-absorbent resin

A water-absorbent resin and antibacterial technology, applied in the field of functional polymer materials, can solve the problems affecting the balance of SAP performance, adverse effects of SAP application performance, inability to effectively inhibit bacterial growth, etc., achieving low cost, excellent water absorption and water retention performance, The effect of excellent antibacterial properties

Inactive Publication Date: 2015-02-18
ZHANGJIAGANG FREE TRADE ZONE GUANXIANG TRADE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese patent CN101531728A proposes a method for preparing superabsorbent resin. Due to the use of a large amount of surfactants in the production process, the indicators of the product have reached the level of similar products on the market, but there are some problems in application performance. Many shortcomings, such as: large reverse osmosis, poor liquid flow performance, etc., have seriously affected the balance of SAP performance; and cannot effectively inhibit the growth of bacteria, and do not have odor control functions
It should be said that the products of these two patents have a certain antibacterial effect, but after use, they will have adverse effects on the application performance of SAP

Method used

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  • Preparation method for natural high-antibacterial-property water-absorbent resin
  • Preparation method for natural high-antibacterial-property water-absorbent resin

Examples

Experimental program
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Effect test

Embodiment 1

[0026] 1) Weigh 50 g of acrylic acid in a three-necked flask, and prepare a 60% acrylate solution with a 25% NaOH solution under an ice-water bath;

[0027] 2) Then add 10g of acrylamide to the acrylate solution, and add 40g of deionized water; then add 10g of molecular weight M w =3000g / mol, the mass fraction is 30% chitosan aqueous solution; add 1% N,N,-methylenebisacrylamide as a crosslinking agent to obtain the early stage solution;

[0028] 3) At room temperature, add 2% of the oxidizing component and 0.5% of the reducing component in the mass fraction of the previous solution into a three-necked flask, stir evenly, and then react at a temperature of T=70°C, and wait until the system condenses After gluing, continue to keep warm for 1 hour under the condition of temperature T=70°C; discharge, wash with water, soak in ethanol, rinse, cut into pieces, dry, and pulverize to obtain the natural high antibacterial water-absorbing resin of the present invention.

Embodiment 2

[0030] 1) Weigh 50g of acrylic acid in a three-necked flask, under an ice-water bath, use a 25% NaOH solution to prepare a 70% acrylate solution,

[0031] 2) Then add 15g of acrylamide to the acrylate solution, and add 50g of deionized water; then add 15g of molecular weight M w =5000g / mol, the mass fraction is 20% chitosan aqueous solution; add 1.5% N,N,-methylenebisacrylamide as a crosslinking agent, stir evenly, and obtain the early stage solution;

[0032] 3) At room temperature, add 2% of the oxidizing component and 0.5% of the reducing component in the mass fraction of the previous solution into a three-necked flask, stir evenly, and then react at a temperature of T=70°C, and wait until the system condenses After gluing, continue to keep warm for 1 hour under the condition of temperature T=70°C; discharge, wash with water, soak in ethanol, rinse, cut into pieces, dry, and pulverize to obtain the natural high antibacterial water-absorbing resin of the present invention. ...

Embodiment 3

[0034] 1) Weigh 50g of acrylic acid in a three-necked flask, under an ice-water bath, use a 25% NaOH solution to prepare a 60% acrylate solution,

[0035] 2) Then add 10g of acrylamide to the acrylate solution, and add 60g of deionized water; then add 30g of molecular weight M w =10000g / mol, the mass fraction is 10% chitosan aqueous solution; add 1.5% N,N,-methylenebisacrylamide as a cross-linking agent, stir evenly to obtain the early stage solution;

[0036] 3) At room temperature, add 2.5% of the oxidizing component and 1% of the reducing component to the three-necked flask respectively by mass fraction of the previous solution, stir evenly, and then react at a temperature of T=90° C. After gluing, continue to keep warm for 1 hour under the condition of temperature T=90°C; discharge, wash with water, soak in ethanol, rinse, cut into pieces, dry, and crush to obtain the natural high antibacterial water-absorbing resin of the present invention.

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Abstract

The invention relates to a preparation method for natural high-antibacterial-property water-absorbent resin. The method comprises the following steps of: neutralizing acrylic acid solution by alkaline liquor under the condition of an ice-water bath, then sequentially adding acrylamide, natural polyelectrolyte chitosan, a cross-linking agent and an initiating agent, uniformly stirring, then reacting at 70-90 DEG C, and after gel occurs in the system, carrying out heat preservation for 1 hour in the reaction temperature condition, taking out the product, cutting into pieces and drying to a constant weight, and finally crushing and sieving to obtain the natural high-antibacterial-property water-absorbent resin. According to the preparation method disclosed by the invention, the natural high-antibacterial-property water-absorbent resin is prepared by an aqueous solution polymerization method, the polymerization speed is high, and the molecular weight is high; water is taken as the medium, reaction heat is easy to lead out, the reaction is safe, and the operation is simple.

Description

technical field [0001] The invention belongs to the field of functional polymer materials, and in particular relates to a natural high antibacterial water-absorbing resin and a preparation method thereof. Background technique [0002] Super absorbent resin (SAP for short) is a new type of functional polymer material developed in recent years. Widely used in adult diapers, sanitary napkins, baby diapers and other water-absorbing sanitary materials, anti-drying materials, cable waterproof materials, food and other packaging materials, building water-blocking materials, agricultural and forestry water-retaining and drought-resistant materials, etc. Absorbent resin for women's sanitary napkins. Since the resin is in a warm and humid environment during use, it is very easy to breed bacteria, which will pose a great threat to the health of users. According to reports, the superabsorbent resin used as health care and cosmetics in the world accounts for more than 80% of the total,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C08F220/06C08F220/56C08F222/38C08F222/14C08F4/40C08J3/12
Inventor 徐再赵云龙徐靖
Owner ZHANGJIAGANG FREE TRADE ZONE GUANXIANG TRADE
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