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Preparation method of konjak-glucomannan-based super-water-absorbent granules

A glucomannan-based, water-absorbing particle technology, applied in the field of super water-absorbing agents, can solve the problems of uneven particle size, poor particle size, etc., and achieve the effects of reducing interfacial tension, prolonging stability, and improving productivity

Inactive Publication Date: 2017-05-24
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a preparation method of konjac glucomannan-based super water-absorbing particles, which can effectively improve the problems of uneven particle size and poor particle size of existing KSAP products

Method used

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  • Preparation method of konjak-glucomannan-based super-water-absorbent granules
  • Preparation method of konjak-glucomannan-based super-water-absorbent granules
  • Preparation method of konjak-glucomannan-based super-water-absorbent granules

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preparation example Construction

[0027] A preparation method of konjac glucomannan-based super water-absorbing particles, comprising the following operations:

[0028] (1) konjac fine powder is placed in warm water and stirred to make it fully swell to obtain konjac fine powder liquid;

[0029] (2) add hexanaphthene and liquid paraffin mixed oil phase and Span 80 that are formed in the konjac fine powder liquid, and stir, obtain the first mixed liquor; In the mixed oil phase, hexanaphthene and liquid paraffin volume ratio are 1: 3~3:1, the volume ratio of Span 80 to mixed oil phase is 1:20~1:50;

[0030] (3) Add ammonium persulfate to the first mixed solution, and stir evenly to obtain the second mixed solution;

[0031] (4) Add acrylic acid and N-N methylenebisacrylamide neutralized with sodium hydroxide to the second mixed liquid, stir and raise the temperature to 60-85°C to fully react;

[0032] (5) Stop stirring the reaction solution and cool it to room temperature. After the reaction solution is allowe...

Embodiment 1

[0035] A preparation method of konjac glucomannan-based super water-absorbing particles, comprising the following operations:

[0036] (1) Take konjac fine powder with a mass fraction of 1% and place it in 40°C pure water for insulation and stirring to make it fully swell;

[0037] (2) in step (1) the konjac fine powder solution, add the mixed organic phase that the hexanaphthene of 2 times volume and liquid paraffin form and Span 80, wherein hexanaphthene and liquid paraffin volume ratio are 1:3, division The total volume ratio of class 80 mixed with cyclohexane and liquid paraffin in the organic phase is 1:50, and stirred evenly;

[0038] (3) adding mass fraction to the solution stirred in step (2) is 0.06% ammonium persulfate, and stir evenly;

[0039] (4) To the solution obtained in step (3), add acrylic acid and 0.01% N-N methylenebisacrylamide with a mass fraction of 7% neutralized with sodium hydroxide, stir at a stirring speed of 400r / min and Raise the temperature to...

Embodiment 2

[0048] A preparation method of konjac glucomannan-based super water-absorbing particles, comprising the following operations:

[0049] (1) Take konjac fine powder with a mass fraction of 2% and place it in 40°C pure water for insulation and stirring to make it fully swell;

[0050] (2) in step (1) konjac fine powder solution, add the mixed organic phase that the hexanaphthene of 1.5 times volume and liquid paraffin form and Span 80, wherein hexanaphthene and liquid paraffin volume ratio are 2:3, division The total volume ratio of the volume of class 80 mixed with cyclohexane and liquid paraffin organic phase is 1:40, and stir evenly;

[0051] (3) adding mass fraction to the stirred solution of step (2) is 0.12% ammonium persulfate, and stir evenly;

[0052] (4) To the solution obtained in step (3), add acrylic acid and 0.02% N-N methylenebisacrylamide with a mass fraction of 8% neutralized with sodium hydroxide, stir at a stirring speed of 500r / min and Raise the temperature ...

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Abstract

The invention discloses a preparation method of konjak-glucomannan-based super-water-absorbent granules. The method comprises the following steps: swelling konjak refined flour with warm water, adding a mixed organic phase composed of cyclohexane and liquid paraffin and Span 80, adding an initiator ammonium persulfate, stirring uniformly, adding sodium-hydroxide-neutralized acrylic acid and N,N-methylene-bis-acrylamide, stirring, heating to 70 DEG C, and reacting for some time; and after the reaction stops, standing the reaction solution to stratify, removing the supernate, cleaning the lower product with water, and drying to obtain the konjak-glucomannan-based super-water-absorbent granules. The konjak-glucomannan-based super-water-absorbent granules have the advantages of uniform particle size, regular shape, favorable granularity, high yield and favorable water absorptivity. The mixed solvent is used as the organic phase to control the granular shape of the product so as to perform one-step granulation, thereby omitting the subsequent granulation process; and thus, the preparation technique has the advantages of simple process, fewer side reactions and low production energy consumption, and is convenient for preparation and application of KASP.

Description

technical field [0001] The invention belongs to the technical field of superabsorbents, and relates to a preparation method of konjac glucomannan-based superabsorbent particles. Background technique [0002] Super Absorbent Polymer (SAP), also known as super absorbent resin, is a functional molecular material, and its structure is usually formed by a certain degree of cross-linking of polymer chains with a considerable number of hydrophilic groups. Because it can absorb water hundreds or even thousands of times heavier than itself, and has a good water retention function, it has a wide range of uses in medical and health care, civil engineering, and agriculture and horticulture. At present, most of the SAPs used in the market are polyacrylic acid, which has the disadvantages of poor biodegradability and easy pollution of the environment. Therefore, it has become a hot spot to use natural polymer compounds as raw materials to synthesize superabsorbent materials. As a natural...

Claims

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Application Information

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IPC IPC(8): C08F251/00C08F220/06C08F222/38C08F2/32
CPCC08F251/00C08F2/32C08F220/06C08F222/385
Inventor 李彦军王勇马小燕强维亮
Owner SHAANXI UNIV OF SCI & TECH
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