Preparation method for compound super absorbent resin containing kieselguhr and cellulose

A technology of superabsorbent resin and diatomite, which is applied in the preparation of composite superabsorbent resin and the field of composite resin preparation, can solve the cumbersome process, low thermal stability of cellulose graft polymerization products, and weak thermal stability of cellulose and other problems, to achieve the effects of wide sources, enhanced adsorption and chemical activity, and improved liquid absorption performance

Active Publication Date: 2017-12-01
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the method of cellulose compounding polypropylene, the cellulose needs to be treated with an alkaline solution, the process is cumbe...

Method used

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  • Preparation method for compound super absorbent resin containing kieselguhr and cellulose
  • Preparation method for compound super absorbent resin containing kieselguhr and cellulose
  • Preparation method for compound super absorbent resin containing kieselguhr and cellulose

Examples

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Embodiment 1

[0032] A preparation method of a composite superabsorbent resin comprising diatomite and cellulose, comprising the following process steps:

[0033] Step 1, adding diatomite to 12% hydrochloric acid solution for modification, the solid-to-liquid ratio of diatomite and hydrochloric acid is 1:5, heating and stirring in a water bath at a temperature of 80°C for 4 hours, washing with distilled water, and suction filtration, drying in an oven to constant weight to obtain modified diatomite;

[0034] Step 2: In an ice-water bath, the molar ratio of sodium hydroxide to acrylic acid is 0.8, and the sodium hydroxide solution is slowly added dropwise to the acrylic acid while stirring to partially neutralize it. After cooling to room temperature, press the acrylamide The mass is 30% of the monomeric acrylic acid, and the mass of the modified diatomite is 4% of the monomeric acrylic acid, adding acrylamide and modified diatomite, ultrasonication, and cooling for later use;

[0035] Step...

Embodiment 2

[0038]This embodiment is basically the same as Embodiment 1, the only difference is that the mass of acrylamide is 20% of the monomeric acrylic acid.

Embodiment 3

[0040] This embodiment is basically the same as Embodiment 1, the only difference is that the mass of acrylamide is 35% of the monomeric acrylic acid.

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Abstract

The invention discloses a preparation method for a compound super absorbent resin containing kieselguhr and cellulose. The method comprises the following steps: firstly modifying the kieselguhr by using hydrochloric acid solution, adding acrylate, acrylamide and the modified kieselguhr which are processed by ultrasound to the swelling cellulose and premixing, and adding a potassium persulfate initiator to induce to generate a free radical, finally adding an N,N'-methylene bisacrylamide cross-linking agent, generating a gel-like compound by copolymerization, drying, and smashing to obtain the sodium polyacrylate/polyacrylamide/kieselguhr/cellulose compound super absorbent resin. The water absorption rate of the compound resin under the room temperature is up to 660.98 g/g, and the absorption rate of 0.9% of normal saline is up to 90.56 g/g. In addition, the heat stability of the compound super absorbent resin is higher, the compound super absorbent resin has the excellent comprehensive performances of good water-absorbing property, salt resistance, heat resistance, high water-retaining property and biocompatibility, and is particularly suitable for the fields, such as agriculture and forestry, environmental protection, and park.

Description

technical field [0001] The invention relates to a preparation method of a composite resin, in particular to a preparation method of a composite superabsorbent resin containing diatomite and cellulose, and belongs to the field of preparation of polymer composite materials. Background technique [0002] Superabsorbent resin is a new type of functional polymer material, which has water absorption because it contains strong hydrophilic groups such as hydroxyl, carboxyl, sulfonic acid, and amide groups. Superabsorbent resin has a three-dimensional network structure after moderate cross-linking, and can absorb water up to hundreds or even thousands of times its own mass. It is widely used in agriculture, forestry, sanitary products, environmental protection, petroleum, etc. [0003] At present, organic matter, inorganic matter and other polymer materials with high water absorption characteristics are often combined with polypropylene superabsorbent resin to prepare polypropylene c...

Claims

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Application Information

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IPC IPC(8): C08F251/02C08F220/06C08F220/56C08F222/38C08F2/44C08K9/02C08K3/34
CPCC08F2/44C08F251/02C08K3/346C08K9/02C08F220/06C08F220/56C08F222/385
Inventor 肖正刚张玉婷
Owner NANJING UNIV OF SCI & TECH
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