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Preparation method of sodium polyacrylate water-absorbing fibers

A technology of sodium polyacrylate and water-absorbing fiber, which is applied in the direction of fiber chemical characteristics, rayon manufacturing, single-component synthetic polymer rayon, etc., can solve the problems of unsatisfactory strength of sodium polyacrylate, affecting product efficacy, and reducing molecular weight, etc. Achieve excellent water retention, increased strength and aging resistance, and is not easy to agglomerate

Active Publication Date: 2018-12-18
深圳市金利源绝缘材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although ultra-high molecular weight sodium polyacrylate is extremely water-absorbent, when it is used as a water-absorbing material, there are also some shortcomings: for example, the strength of sodium polyacrylate itself is not ideal, and when it is exposed to high temperature, strong light, high salt content, etc. In the environment, its molecular chain is prone to breakage, and its molecular weight is reduced, resulting in a further decrease in its strength, which ultimately affects the efficacy of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A preparation method of sodium polyacrylate water-absorbing fiber, the steps are as follows:

[0042] A) Preparation of organically modified vermiculite powder:

[0043] Add 10 parts of lactose and 10 parts of dodecyldimethylbenzyl ammonium chloride to 100 parts of water, heat to 65°C for 5 hours, wash the product with ethanol after vacuum distillation, and dry to obtain modified lactose ,spare.

[0044] Calcinate the vermiculite at 550°C for 3 hours, then grind it into vermiculite powder; prepare 100 parts of vermiculite powder with water into a 4wt% suspension, heat it to 60°C, add 50 parts of modified lactose to the suspension, stir and keep it warm for 14 hours , and then centrifuged, filtered, and dried to obtain organically modified vermiculite powder.

[0045] B) Neutralization: 90 parts of acrylic acid and 10 parts of acrylamide were added to 200 parts of water, and then neutralized with 8 wt% sodium hydroxide aqueous solution until the pH of the system was 5....

Embodiment 2

[0049] A preparation method of sodium polyacrylate water-absorbing fiber, the steps are as follows:

[0050] A) Preparation of organically modified vermiculite powder:

[0051] Add 10 parts of lactose and 10 parts of dodecyldimethylbenzyl ammonium chloride to 100 parts of water, heat to 65°C for 5 hours, wash the product with ethanol after vacuum distillation, and dry to obtain modified lactose ,spare.

[0052] Calcinate the vermiculite at 550°C for 3 hours, then grind it into vermiculite powder; prepare 100 parts of vermiculite powder with water into a 4wt% suspension, heat it to 60°C, add 50 parts of modified lactose to the suspension, stir and keep it warm for 14 hours , and then centrifuged, filtered, and dried to obtain organically modified vermiculite powder.

[0053] B) Neutralization: 90 parts of acrylic acid and 10 parts of acrylamide were added to 200 parts of water, and then neutralized with 8 wt% sodium hydroxide aqueous solution until the pH of the system was 5....

Embodiment 3

[0060] A preparation method of sodium polyacrylate water-absorbing fiber, the steps are as follows:

[0061] A) Preparation of organically modified vermiculite powder: Add 8-parts of lactose and 8 parts of dodecyldimethylbenzyl ammonium chloride to 90 parts of water, heat to 60°C for 6 hours, and distill the product under reduced pressure Wash with ethanol, dry to obtain modified lactose, and set aside.

[0062] Calcinate the vermiculite at 500°C for 4 hours, and then grind it into vermiculite powder; prepare 90 parts of vermiculite powder with water to form a 3wt% suspension, heat it to 55°C, add 40 parts of modified lactose to the suspension, stir and keep it warm for 10 hours , and then centrifuged, filtered, and dried to obtain organically modified vermiculite powder.

[0063] B) Neutralization: 85 parts of acrylic acid and 15 parts of acrylamide were added to 150 parts of water, and then neutralized with 5 wt% sodium hydroxide aqueous solution until the pH of the system ...

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Abstract

The invention relates to the field of synthesis of polymer materials and discloses a preparation method of sodium polyacrylate water-absorbing fibers. The preparation method comprises: A) preparationof organically modified vermiculite powder: adding lactose and dodecyl dimethyl benzyl ammonium chloride into water, carrying out heating for a reaction, carrying out reduced pressure distillation, cleaning the product, drying the product to obtain modified lactose, calcining and grinding vermiculite, preparing a suspension liquid, carrying out heating, adding the modified lactose into the suspension liquid, carrying out stirring under thermal insulation for a reaction, and carrying out centrifugation, filtration and drying, B) neutralization: adding acrylic acid and acrylamide into water, andthen neutralizing the solution with sodium hydroxide until the pH is 5-5.5, C) polymerization: adding organically modified vermiculite and bacterial cellulose into the solution, and adding a triallylammonium chloride and an initiator into the solution for a reaction so that a viscous liquid is obtained, and D) wet spinning: preparing sodium polyacrylate fibers. The organically modified vermiculite powder in the sodium polyacrylate fibers can effectively improve the strength and aging resistance of fibers.

Description

technical field [0001] The invention relates to the field of polymer material synthesis, in particular to a preparation method of sodium polyacrylate water-absorbing fiber. Background technique [0002] Sodium polyacrylate is a kind of hydrophilic polymer material. The solid product is white (or light yellow) block or powder, and the liquid product is colorless (or light yellow) viscous liquid. Soluble in cold water, warm water, glycerin, propylene glycol and other media. [0003] According to the size of sodium polyacrylate, it can be used in different fields. For low molecular weight sodium polyacrylate with molecular weight in the range of 1000-5000, it is mainly used as a dispersant. For medium molecular weight sodium polyacrylate with molecular weight in the range of 1W-100W Sodium acrylate is mainly used as a thickener. For high molecular weight sodium polyacrylate with a molecular weight above 100W, it is almost insoluble in water and can only swell in water. It is m...

Claims

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Application Information

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IPC IPC(8): D01F6/52D01F1/10C08F220/06C08F220/56C08F226/02C08F4/02C08G69/10
CPCC08F4/027C08F220/06C08G69/10D01F1/10D01F6/52C08F220/56C08F226/02
Inventor 吴晓薇
Owner 深圳市金利源绝缘材料有限公司
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