Manufacturing method of compound type super absorbent resin

A superabsorbent resin and composite technology, applied in the chemical and environmental fields, can solve problems such as poor salt tolerance, high preparation temperature, and not easy to degrade, and achieve the effects of low cost, good water absorption, and large pH value application range

Active Publication Date: 2014-05-21
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of high preparation temperature, poor salt resistance and secondary pollution caused by difficult degradation of the existing water-absorbent resin products, the present invention provides a composite superabsorbent resin prepared by using wheat straw cellulose, modified bentonite grafted with acrylic acid and acrylamide The method of the high-absorbent resin, the method reacts at normal temperature, has little secondary pollution, has good water absorption performance, and is a preparation method of biodegradable straw-based superabsorbent resin

Method used

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  • Manufacturing method of compound type super absorbent resin
  • Manufacturing method of compound type super absorbent resin
  • Manufacturing method of compound type super absorbent resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: A kind of preparation method of superabsorbent resin, the steps are as follows:

[0029] (1) Wheat straw pretreatment: wash with water to remove the dirt and dust on the surface of the wheat straw. Dry it at 70°C, then pulverize it, sieve it with a 100-mesh sieve, weigh a certain amount of sieved wheat straw, add 12wt% ammonia water in the ratio of ammonia water quality: straw quality=12:1 , soaked for 48 hours, the soaked wheat stalks were suction filtered and washed and dried with distilled water; a certain amount of dried wheat stalks were taken and mixed with nitric acid solution (1mol / L) quality: straw quality=12:1 Boil 1mol / L nitric acid solution for 45 minutes, then filter the mixture with suction, rinse with distilled water, and dry; set aside.

[0030] (2) Preparation of modified bentonite: Take 5g of sodium bentonite in 20mL of distilled water, adjust the pH to 7.5, add 40mL of a solution containing 5.5mmol of CTAB, react at 80°C for 2h, cool to...

Embodiment 2

[0034] Embodiment 2: As described in Embodiment 1, the difference is the consumption of wheat stalks:

[0035] Take 1.20 g of pretreated wheat straw and 0.12 g of modified bentonite in a three-necked round-bottomed flask, and the rest of the operations are the same as in Example 1. The maximum water absorption rate of the obtained composite superabsorbent resin can reach 168.8g / g, and the salt water absorption rate can reach 22.2g / g.

Embodiment 3

[0036] Embodiment 3: as described in embodiment 1, difference is the consumption of organic bentonite:

[0037] Take 1.00 g of pretreated wheat straw and 0.09 g of modified bentonite in a three-necked round-bottomed flask, and the rest of the operations are the same as in Example 1. The maximum water absorption rate of the obtained composite superabsorbent resin can reach 188.5g / g, and the salt water absorption rate can reach 23.7g / g.

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Abstract

The invention relates to a manufacturing method of a compound type super absorbent resin. The manufacturing method provided by the invention comprises the following steps: pre-processing wheat straws, modifying sodium bentonite by cetyltrimethylammonium bromide, performing copolymerization on the pre-processed wheat straws, the modified bentonite, crylic acid and acrylamide to form the super absorbent resin; collecting a potassium peroxydisulfate solution, an eerie ammonium nitrate solution and a sodium sulfite solution as a compound initiator; and using N-N-methylene diacrylamide as a cross linker. The manufactured compound type super absorbent resin is low in cost and good in water absorbability and salt tolerance, and is applicable in a pH value ranging from 6-10, so that the manufacturing method provided by the invention can be widely applied in the industrial and agricultural production.

Description

technical field [0001] The invention relates to a preparation method of a composite superabsorbent resin, which belongs to the technical field of chemistry and environment. Background technique [0002] Superabsorbent resin can absorb water equivalent to hundreds to thousands of times its own weight, and can maintain a high water absorption ratio under limited pressure after absorbing water. It is the most water-absorbing material among all water-absorbing agents at present. Due to its excellent water absorption and water retention, water-absorbent resins are used in many fields, such as gardening, agriculture, and hygiene products. Judging from the current research status at home and abroad, most of the existing superabsorbent resins are synthesized by using a large amount of organic substances, which are expensive and not easy to be biodegraded. Therefore, it is urgent to develop low-cost and environmentally friendly superabsorbent resins. In recent years, more and more a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/02C08F220/06C08F220/56C08F2/44C08K9/04C08K3/34
Inventor 李倩王瑞岳钦艳高宝玉彭娜娜高悦
Owner SHANDONG UNIV
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