A kind of preparation method of sodium polyacrylate water-absorbent fiber

A sodium polyacrylate, water-absorbing fiber technology, applied in the chemical characteristics of fibers, rayon manufacturing, single-component synthetic polymer rayon and other directions, can solve the problems of strength reduction, molecular chain breakage, molecular weight reduction, etc., to improve strength and Aging resistance, improving strength and aging resistance, the effect of not easy to agglomerate

Active Publication Date: 2021-05-04
SHENZHEN JINLIYUAN INSULATION MATERIAL CO LTD
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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 polymer material synthesis, and discloses a method for preparing sodium polyacrylate water-absorbing fibers. The steps are: A) preparation of organically modified vermiculite powder: chlorinating lactose and dodecyldimethylbenzyl Ammonium is added to water for heating reaction, the product is washed under reduced pressure, and dried to obtain modified lactose; vermiculite is calcined and pulverized; prepared into a suspension, heated, added modified lactose, stirred and incubated for reaction, and then centrifuged , filter, dry; B) neutralization: add acrylic acid and acrylamide to water, then neutralize with sodium hydroxide until the pH is 5-5.5; C) polymerization: add organically modified vermiculite and bacterial cellulose first, Then add triallyl ammonium chloride and an initiator, and react to obtain a viscous liquid; D) wet spinning to obtain sodium polyacrylate fiber; the present invention is compounded with organically modified leech in the sodium polyacrylate fiber Stone powder can effectively improve the strength and aging resistance of high fiber.

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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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/52D01F1/10C08F220/06C08F220/56C08F226/02C08F4/02C08G69/10
CPCC08F4/027C08F220/06C08G69/10D01F1/10D01F6/52C08F220/56C08F226/02
Inventor 吴晓薇
Owner SHENZHEN JINLIYUAN INSULATION MATERIAL CO LTD
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