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Method of preparing starch-base highly-water-absorbent material by radiation

A high water-absorbent material and starch-based technology, which is applied in the fields of sanitation, chemical industry, agriculture and forestry, can solve the problems of high performance of water-absorbent materials, difficulty in colloid cutting, and high water content, so as to improve product performance, low utilization rate, and reduce volatilization loss Effect

Inactive Publication Date: 2014-05-28
FARM PROD PROCESSING & NUCLEAR AGRI TECH INST HUBEI ACAD OF AGRI SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing starch-based superabsorbent materials by irradiation. This method can solve the problems of large water content, difficult colloid cutting, and drying and dehydration during the preparation of water-absorbent materials. The prepared water-absorbent materials have high performance and low cost. Low

Method used

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  • Method of preparing starch-base highly-water-absorbent material by radiation
  • Method of preparing starch-base highly-water-absorbent material by radiation
  • Method of preparing starch-base highly-water-absorbent material by radiation

Examples

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Effect test

Embodiment 1

[0027] The method for preparing starch-based superabsorbent material by irradiation comprises the following steps:

[0028] 1) Select 7 grams of starch (konjac flying powder), 44 grams of acrylic acid, 60.9 grams of 32wt% sodium hydroxide aqueous solution, and 60 grams of water, and set aside;

[0029] 2) Mix starch and water evenly, stir, heat to 90°C for gelatinization, add 5 grams of sodium hydroxide solution selected in step 1), at this time, the starch paste becomes more transparent, and the starch paste is obtained;

[0030] 3) Slowly inject the acrylic acid selected in step 1) into the remaining sodium hydroxide solution in an ice bath, stir to dissipate heat, and obtain a neutralizing solution;

[0031] 4) Mix the starch paste prepared in step 2) and the neutralizing solution prepared in step 3) evenly, fill the bag, remove the air, and seal it to obtain the mixture;

[0032] 5) The mixture after bag filling is at room temperature and the radiation source is 60 After...

Embodiment 2

[0047] Example 2: Adjusting the amount of water

[0048] The method for preparing starch-based superabsorbent material by irradiation comprises the following steps:

[0049] 1) Select 5 parts of the following raw materials for use (corresponding to 5 parts of the product), and the starch is corn starch:

[0050] Part 1: 7 grams of starch, 44 grams of acrylic acid, 60.9 grams of 32wt% sodium hydroxide aqueous solution, and 40 grams of water;

[0051] Part 2: 7 grams of starch, 44 grams of acrylic acid, 60.9 grams of 32wt% sodium hydroxide aqueous solution, and 50 grams of water;

[0052] Part 3: 7 grams of starch, 44 grams of acrylic acid, 60.9 grams of 32wt% sodium hydroxide aqueous solution, and 60 grams of water;

[0053] Part 4: 7 grams of starch, 44 grams of acrylic acid, 60.9 grams of 32wt% sodium hydroxide aqueous solution, and 70 grams of water;

[0054] Part 5: 7 grams of starch, 44 grams of acrylic acid, 60.9 grams of 32wt% sodium hydroxide aqueous solution, and 80...

Embodiment 3

[0073] Embodiment 3: adjust the amount of alkali

[0074] The method for preparing starch-based superabsorbent material by irradiation comprises the following steps:

[0075] 1) Select 2 parts of the following raw materials for use (corresponding to 2 parts of the product), and the starch is konjac powder:

[0076] The first part: select 7 grams of starch, 44 grams of acrylic acid, 47.6 grams of 32wt% sodium hydroxide aqueous solution, and 60 grams of water;

[0077] The second part: select 7 grams of starch, 44 grams of acrylic acid, 60.9 grams of 32wt% sodium hydroxide aqueous solution, and 60 grams of water;

[0078] 2) Mix starch and water evenly, stir, heat to 90°C for gelatinization, add 5 grams of sodium hydroxide solution selected in step 1), at this time, the starch paste becomes more transparent, and the starch paste is obtained;

[0079] 3) Slowly inject the acrylic acid selected in step 1) into the remaining 42.6 grams of sodium hydroxide solution in an ice bath,...

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Abstract

The invention relates to a method of preparing a starch-base highly-water-absorbent material by radiation. The method is characterized by comprising steps of: 1) preparing raw materials of starch, acrylic acid, sodium hydroxide solution and water according to a weight ratio of 6-9:44:47.6-60.9:40-80; 2) mixing the water and the starch, heating for gelatinization, and adding the sodium hydroxide solution to obtain starch paste; 3) placing the rest of the sodium hydroxide solution in an ice bath, and injecting the acrylic acid into the sodium hydroxide solution to obtain a neutralization solution; 4) uniformly mixing the starch paste and the neutralization solution; 5) radiating the mixture at room temperature under a radiation source for 1-4 kGy, and placing at room temperature for 8 h to obtain colloid; 6) adding the colloid into a meat mincer and mincing the colloid into bars to obtain bar-shaped colloid; 7) putting the bar-shaped colloid into a microwave drying oven, and drying step by step until the weight of the bar-shaped colloid is constant; and 8) smashing the dry material obtained in the step 7) by a smashing machine, and sieving with a sieve having a size of 20-100 meshes to obtain the starch-base highly-water-absorbent material. The starch-base highly-water-absorbent material is high in performance and low in cost.

Description

technical field [0001] The invention belongs to the technical fields of chemical industry, sanitation and agriculture and forestry, and relates to the preparation of water-absorbing materials, in particular to a method for preparing starch-based super-absorbent materials by irradiation. Background technique [0002] Water-absorbing materials are a class of macromolecules containing hydrophilic groups and cross-linked structures. They are mainly divided into starch-based, cellulose-based, and synthetic polymer-based categories. Among them, starch-based materials have the advantages of common raw materials, low cost, and easy degradation. , is the most widely used category. The traditional preparation method of starch acrylic water-absorbing materials is the chemical method of reverse phase solution polymerization, using heavy metal reagents as initiators, a large amount of organic solvents need to be recycled, the mixing reaction conditions are difficult to control, and there...

Claims

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Application Information

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IPC IPC(8): C08F251/00C08F220/06C08F2/46
Inventor 耿胜荣熊光权夏和舟廖涛李新鉏晓艳江洪有邱建辉陈玉霞叶丽秀谷峰
Owner FARM PROD PROCESSING & NUCLEAR AGRI TECH INST HUBEI ACAD OF AGRI SCI
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