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Preparation of high-water-absorption material from sa-son seed gum graft polymeric acrylic acid (salt) by microwave radiation

A technology of grafting acrylic acid and microwave radiation, which is applied in the field of water-absorbing materials, can solve the problems of low grafting efficiency and long time, and achieve the effects of low energy consumption, shortened reaction cycle and good water absorption performance

Inactive Publication Date: 2005-02-16
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conventional grafting reaction takes a long time and the grafting efficiency is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Under cooling in an ice-water bath, neutralize 5 parts of acrylic acid with 18% sodium hydroxide to a neutralization degree of 80%. Then add 0.1 part of initiator (0.1 g / ml), and add 1 part of artemisia gum under thorough stirring. After stirring evenly, place it in a microwave reaction device, adjust the radiation power to 180W, and radiate for 4 minutes to carry out graft polymerization. After the reaction is completed, put the product into a 65°C device for drying, then pulverize it, and measure its water absorption and other properties. After the product was extracted with acetone in a Soxhlet extractor for 36 hours, the grafting efficiency, grafting rate and monomer conversion rate were calculated. Infrared spectroscopy (FT-IR), scanning electron microscopy (TEM), differential scanning calorimetry (DSC), and thermogravimetric analysis (TG-DTA) were used for characterization.

Embodiment 2

[0024] Under cooling in an ice-water bath, neutralize 5 parts of acrylic acid with 18% potassium hydroxide until the degree of neutralization is 80%. Then add 0.1 part of initiator (0.1 g / ml), and add 1 part of locust bean gum under thorough stirring. After stirring evenly, place it in a microwave reaction device, adjust the radiation power to 180W, and radiate for 4 minutes to carry out graft polymerization. After the reaction is completed, put the product into a 68°C device for drying, then pulverize it, and measure its water absorption and other properties. After extracting the product with acetone in a Soxhlet extractor for 36 hours, calculate its grafting efficiency, grafting rate and monomer conversion rate, etc., and apply infrared spectroscopy (FT-IR), scanning electron microscopy (TEM), differential scanning calorimetry Analysis (DSC), thermogravimetric analysis (TG-DTA) etc. for characterization.

Embodiment 3

[0026] Under cooling in an ice-water bath, neutralize 5 parts of acrylic acid with 18% ammonia water until the neutralization degree is 80%. Then add 0.1 part of initiator (0.1 g / ml), and add 1 part of guar gum under thorough stirring. After stirring evenly, place it in a microwave reaction device, adjust the radiation power to 180W, and radiate for 4 minutes to carry out graft polymerization. After the reaction is completed, put the product into a 70°C device for drying, then pulverize it, and measure its water absorption and other properties. After extracting the product with acetone for 40 h in a Soxhlet extractor, calculate its grafting efficiency, grafting rate and monomer conversion rate, etc., and apply infrared spectroscopy (FT-IR), scanning electron microscopy (TEM), differential scanning calorimetry Analysis (DSC), thermogravimetric analysis (TG-DTA) etc. for characterization.

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Abstract

This invention refers to a kind of method of producing sopping material by grafting sand sagebrush gum into crylic acid (acrylate) in microwave radiation. The manufacturing engineering is to neutralize the crylic acid partially with sodium hydroxide, potassium hydroxide or ammonia, then adds initiator and sand sagebrush gum or other vegetable gum to it when whisking and puts it into microwave response operator after the system is well-proportioned. You should adjust it to certain radiation power and radiation time, without adding crosslinking agent to it, to graft the sand sagebrush gum into crylic acid and dry the product. After smashed, it becomes the final product. The water absorption rate of the sopping material produced by the invention is between 400ml / s and 500ml / s. The polyreaction only needs between 4min and 5min after adopting the microwave radiation technology. This invention can solve the problem of high cost of now-existing sopping material. The product can be used as anti wind erosion agent and sand-fixation agent in the field of entironment and play an active role in advancing germination, anti-drought and other dry farming.

Description

technical field [0001] The invention relates to a water-absorbing material, in particular to a water-absorbing material prepared by grafting acrylic acid (salt) with artemisia gum by microwave radiation. technical background [0002] As a brand-new energy source, microwave has gradually entered the field of chemistry, and its role in promoting chemical reactions is attracting more and more attention. The use of microwaves in synthetic chemistry began in 1986 when R.GEDGE et al. used microwaves to study esterification, hydrolysis, oxidation, nucleophilic substitution, and DIELS-ALDER cycloaddition reactions. Since then, they have made great achievements in dozens of synthetic reactions of organic compounds Great success. In addition, microwave has many applications in analytical chemistry, polymerization reaction, chemical engineering, metal ore smelting and so on. Studies in recent years have shown that microwave radiation can cause special reactions in some polysaccharide...

Claims

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Application Information

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IPC IPC(8): C08F251/00
Inventor 王云普张继袁昆王永峰李玉峰刘小军
Owner NORTHWEST NORMAL UNIVERSITY
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