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High-water-absorption composite material and preparation method thereof

A composite material and high water absorption technology, applied in the field of high water absorption composite material and its preparation, can solve the problems of waste paper fiber recycling and less research on use performance, and achieve the effects of excellent water absorption, saving resources and energy, and expanding the scope of use

Pending Publication Date: 2021-11-30
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This is mainly limited to the fixed thinking that the research on waste paper fibers focuses on the use performance and physical and chemical properties of recycled paper, and there are relatively few studies on the subsequent recovery and use performance of waste paper fibers from the perspective of morphology and structural properties.

Method used

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  • High-water-absorption composite material and preparation method thereof
  • High-water-absorption composite material and preparation method thereof
  • High-water-absorption composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The specific preparation process of the superabsorbent composite material is as follows:

[0052] Add 2.1 g of sodium hydroxide (dissolved in 6 ml of distilled water) dropwise to 5.4 g of acrylic acid (AA) until the neutralization degree of acrylic acid is 70%, set aside.

[0053] Under the condition of a water bath at 70 °C, 1.08 g of polyaspartic acid (PASP), 0.108 g of waste paper and 0.675 g of 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) were added to the In a four-necked flask with a mechanical stirring device, a constant pressure dropping funnel and a nitrogen conduit, heat and stir for 1 h to form a homogeneous mixture.

[0054] Then add the initiator 0.10 g potassium persulfate (KPS) solution and keep stirring for 15 min to generate free radicals.

[0055] Next, acrylic acid with a degree of neutralization of 70% and a crosslinking agent of 0.013 g of N,N-methylenebisacrylamide (MBA) were added dropwise thereto. After the dropwise addition, the constan...

Embodiment 2~6

[0063] The difference from Example 1 is that the amount of PASP is adjusted to 0.54 g, 1.08 g, 1.62 g, 2.16 g, and 2.70 g, and the content of PASP relative to AA is 10wt%, 20wt%, 30wt%, 40wt%, 50wt % super absorbent composite material.

[0064] Image 6 Water absorption (salt) performance of superabsorbent composites mixed with different PASP contents. It can be seen from the figure that when the content of PASP is less than 20%, the water absorption rate of the super absorbent composite material is on the rise. This is because as the amount of PASP increases, the probability of macromolecular free radicals colliding with the monomer increases. The degree of graft copolymerization is improved, and the water absorption ratio is increased. When the content of PASP is equal to 20%, the water absorption rate is the largest (710.2 g / g and 73.2 g / g in distilled water and 0.9% NaCl solution, respectively). When the content of PASP is greater than 20%, the water absorption capacity...

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Abstract

The invention discloses a high-water-absorption composite material. The high-water-absorption composite material is mainly prepared from the following raw materials in parts by weight through polymerization reaction: 100 parts of acrylic acid, 10 to 50 parts of polyaspartic acid, 10 to 50 parts of 2-acrylamido-2-methyl-1-propanesulfonic acid, 0 to 10 parts of waste fibers, 1.5 to 2 parts of an initiator and 0.05 to 0.25 part of a cross-linking agent. Compared with the prior art, the high-water-absorption composite material disclosed by the invention is simple in preparation process and low in cost, has excellent water absorption, water retention and repeated swelling properties, not only can fully recycle and reuse domestic waste fiber resources, but also expands the utilization range of polyaspartic acid, and has great environmental benefits and economic benefits in the aspects of reducing pollution, saving resources and energy and the like.

Description

technical field [0001] The invention relates to a superabsorbent composite material and a preparation method thereof. Background technique [0002] In recent years, superabsorbent composite materials have been favored by researchers as an efficient water treatment material. It is a chemical water-saving and high-tech drought-resistant product that is developing rapidly at present. It has the characteristics of fast absorption and slow release of water, and can reduce the surface water of the cultivation substrate and the evaporation of substrate water. It can be used in agriculture, which can prevent plants from growing. Continuously used gravity water is stored to effectively increase the water holding capacity of the matrix to improve water use efficiency. [0003] Due to the continuous development of modern urbanization, urban environmental waste is being generated at an exponential rate, and paper products are one of the largest solid wastes. Compared with natural fibe...

Claims

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Application Information

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IPC IPC(8): C08F283/04C08F251/02C08F220/06C08F220/58C08F222/38
CPCC08F283/04C08F251/02C08F220/06C08F220/585C08F222/385
Inventor 马国富桑武堂王向兵李小侠彭辉雷自强
Owner NORTHWEST NORMAL UNIVERSITY
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