Natural nutritional high-water-absorptivity resin and preparation method thereof

A superabsorbent resin and nutrient-based technology, applied in chemical instruments and methods, other chemical processes, applications, etc., can solve problems that have not been reported in superabsorbent composite materials, and achieve improved stress resistance, fast water absorption, and fertile soil Effect

Active Publication Date: 2012-08-01
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there are many water-absorbent resins prepared from natural raw materials. For example, Chinese patent (CN101735396A) discloses a superabsorbent resin prepared from wheat straw. Water-absorbing resin, Chinese patent (CN

Method used

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  • Natural nutritional high-water-absorptivity resin and preparation method thereof
  • Natural nutritional high-water-absorptivity resin and preparation method thereof
  • Natural nutritional high-water-absorptivity resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (1) Preparation of nutritional superabsorbent resin: Accurately weigh 3g of unnatural sheep manure powder, add it to a four-necked flask filled with 30ml of distilled water, install a stirring device, a condensation device, and a nitrogen protection device. Under reduced pressure conditions (specific pressure 0.01Mpa), heat to 50°C for gelatinization for 25 minutes, cool down to 55°C, add 12 g of acrylic acid, 1.5 g of palygorskite raw ore and 0.0165 g of crosslinking agent and stir at high speed for 5 minutes, then add 0.066 g initiator potassium persulfate, stirred at 65°C for 20 minutes to obtain a cross-linked polymer product. The cross-linked product was taken out, dehydrated twice with anhydrous methanol, washed with anhydrous ethanol, placed in an oven, dried at 70°C, crushed, and passed through a 20-mesh sieve.

[0054] (2) Performance test

[0055] Water absorption: distilled water 583g / g, sodium chloride solution 146 g / g.

[0056] Gel strength: 182 g / cm 2 ....

Embodiment 2

[0058] (1) Preparation of nutritional superabsorbent resin: Accurately weigh 3g of unnatural sheep manure powder, add it to a four-necked flask filled with 30ml of distilled water, install a stirring device, a condensation device, and a nitrogen protection device. Under reduced pressure conditions (specific pressure 0.02Mpa), heat to 50°C for gelatinization for 25 minutes, cool down to 55°C, add 15 g of acrylic acid, 2.5 g of palygorskite raw ore and 0.041 g of crosslinking agent and stir at high speed for 10 minutes, then add 0.103 g of initiator potassium persulfate was stirred at 70°C for 30 minutes to obtain a cross-linked polymer product. The cross-linked product was taken out, dehydrated twice with anhydrous methanol, washed with anhydrous ethanol, placed in an oven, dried at 70°C, crushed, and passed through a 20-mesh sieve.

[0059] (2) Performance test

[0060] Water absorption: distilled water 547 g / g, sodium chloride solution 110 g / g.

[0061] Gel strength: 190 g / ...

Embodiment 3

[0063] (1) Preparation of nutritional superabsorbent resin: Accurately weigh 3g of unnatural sheep manure powder, add it to a four-necked flask filled with 30ml of distilled water, install a stirring device, a condensation device, and a nitrogen protection device. Under reduced pressure conditions (specific pressure 0.03Mpa), heat to 60 ℃ for gelatinization for 30 minutes, cool down to 60 ℃, add 18 g of acrylic acid, 3.5 g of palygorskite raw ore and 0.049 g of crosslinking agent and stir at high speed for 15 minutes, then add 0.098 g initiator potassium persulfate, stirred at 75°C for 40 min to obtain a cross-linked polymer product. The cross-linked product was taken out, dehydrated twice with anhydrous methanol, washed with anhydrous ethanol, placed in an oven, dried at 70°C, crushed, and passed through a 20-mesh sieve.

[0064] (2) Performance test

[0065] Water absorption: distilled water 580 g / g, sodium chloride solution 137 g / g.

[0066] Gel strength: 179 g / cm 2 .

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Abstract

The invention provides a natural nutritional high-water-absorptivity resin, belonging to the technical field of high molecular materials. Natural sheep manure powder (more than 120 meshes), acrylic acid and raw paligorskite are used as base materials, N,N'-methylene-bis-acrylamide is used as a crosslinking agent, and potassium persulfate is used as an initiator; and in a water solution, free-radical initiation is carried out, so that the acrylic acid, natural sheep manure powder and raw paligorskite are subjected to graft polymerization, thereby obtaining the natural nutritional high-water-absorptivity resin. The test on water absorptivity, water retention property, salt tolerance, elementary analysis and biodegradation proves that the composite material has the advantages of high water absorption rate, high water absorption amount, long water retention time, favorable salt tolerance, abundant nutrient elements, high biodegradability and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a superabsorbent resin, in particular to a natural nutritional superabsorbent resin based on natural sheep dung powder, acrylic acid, and palygorskite raw minerals; The preparation method of water-absorbent resin. Background technique [0002] Superabsorbent Polymers (SAP for short) refers to a gel that can quickly absorb hundreds to thousands of times its own weight of distilled water or dozens of times of normal saline through hydration, and is not easy to dehydrate even under pressure. A lightly cross-linked high molecular polymer is a new type of chemical preparation developed in the past ten years. Superabsorbent resin has superior performance and is widely used. It has broad application prospects in many fields such as building materials, daily chemicals, petroleum industry, environmental protection industry, fiber industry, electronics industry, etc., especially i...

Claims

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Application Information

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IPC IPC(8): C08F292/00C08F220/06C08F222/38C09K17/20C05G3/00C05G3/04C09K101/00C09K109/00C05G3/80
Inventor 雷自强李文锋沈智张哲高淑玲李芳红彭辉安宁
Owner NORTHWEST NORMAL UNIVERSITY
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