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Method for synthesizing persimmon tannin-crylic acid series macromolecule bibulous resin

A polymer water-absorbing, acrylic technology, applied in the field of materials, can solve the problems such as the molecular chains of the polymer water-absorbing resin are dispersed in nanometers, the polymer water-absorbing resin has high viscosity, and the molecular chains cannot be dispersed, etc., and achieve production safety. High coefficient, fast polymerization speed, no environmental pollution

Inactive Publication Date: 2009-04-29
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solution polymerization is easy to operate and has no environmental pollution. The disadvantage is that the heat generated by the reaction is difficult to dissipate. The traditional inverse suspension polymerization method uses very little surfactant, which is generally used as a suspending agent, which makes the synthetic polymer water-absorbent resin too high in viscosity. , after absorbing water, the molecular chains cannot be dispersed, and they are in the form of agglomerates (see figure 1 ), the resulting consequence is that it is often difficult to carry out in a common reactor, the post-treatment is very difficult, and it cannot meet the specific requirements that the molecular chains of the polymer water-absorbent resin are dispersed at a nanometer level

Method used

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  • Method for synthesizing persimmon tannin-crylic acid series macromolecule bibulous resin
  • Method for synthesizing persimmon tannin-crylic acid series macromolecule bibulous resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add 2.6 liters of n-hexane, 5 kg of persimmon tannin solution, 0.5 liter of sulfate ester surfactant, 20 g of N, N methylene bisacrylamide, and 37 g of ammonium persulfate in a small glass-lined kettle. Introduce nitrogen gas for 15-30 minutes, start the mixer and keep it at 450 rpm for 10-30 minutes, add sodium acrylate aqueous solution (acrylic acid 13kg, sodium hydroxide 5kg, water 15kg) and then keep it at 400 rpm, and heat up to 60 °C for 1 hour, then raised to 70 °C for 3 hours, after the reaction was over. Cooling water is passed through the jacket of the reaction kettle to cool down to room temperature, and the reaction materials are discharged. Use a drying machine to separate unreacted substances such as n-hexane, and the separated substances can be reused. The finished product is obtained after drying the dried reaction material, and the obtained product is a brown gel-like substance, and its water absorption rate can reach more than 900 times its own weight...

Embodiment 2

[0030] Add 3.2 liters of n-hexane, 10 kg of persimmon tannin solution, 1.25 liters of sulfate ester surfactant, 40 g of N, N methylenebisacrylamide, and 26 g of ammonium persulfate in a small glass-lined kettle, and pass Introduce nitrogen gas for 15-30 minutes, start the mixer and keep it at 450 rpm for 10-30 minutes, add sodium acrylate aqueous solution (acrylic acid 13kg, sodium hydroxide 5kg, water 15kg) and then keep it at 400 rpm, and heat up to 60°C Keep it for 0.15 hours, raise the temperature to 70°C and keep it for 1 hour, after the reaction ends. Cooling water is passed through the jacket of the reaction kettle to cool down to room temperature, and the reaction materials are discharged. Use a drying machine to separate unreacted substances such as n-hexane, and the separated substances can be reused. The finished product is obtained after the dried reaction material is dried, and the obtained product is a brown gel-like substance, and its water absorption rate can ...

Embodiment 3

[0032] Add 3.8 liters of n-hexane, 11 kg of persimmon tannin solution, 1.5 liters of sulfate ester surfactant, 7 g of N, N methylenebisacrylamide, and 26 g of ammonium persulfate in a small glass-lined kettle. Introduce nitrogen gas for 15-30 minutes, start the mixer and keep it at 450 rpm for 10-30 minutes, add sodium acrylate aqueous solution (acrylic acid 13kg, sodium hydroxide 5kg, water 15kg) and then keep it at 400 rpm, and heat up to 60 °C was maintained for 0.15 hours, then the temperature was raised to 70 °C and maintained for 1 hour, after the reaction was completed. Cooling water is passed through the jacket of the reaction kettle to cool down to room temperature, and the reaction materials are discharged. Use a drying machine to separate unreacted substances such as n-hexane, and the separated substances can be reused. The finished product is obtained after the dried reaction material is dried, and the obtained product is a milky brown gel-like substance, and its ...

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Abstract

The invention discloses a method for synthesizing persimmon tannic solution -acrylic acid series high polymer absorbent resin, which is characterized by the following: applying the reversed phase suspension polymerization method; putting skellysolve B in the autoclave with the jacket; adding the neutralized sodium acrylate solution, cross linker, initiating agent and persimmon tannic solution. The specific procedure comprises the following steps: weighing the material; synthesizing; discharging the reaction solution; separating the reaction solution with drier. The invention is provided with the simple technological process, which can control the synthesizing temperature effectively, accelerates the polymerization speed, doesn't pollute the environment, and has the high assurance coefficient and the low cost. The persimmon tannic solution -acrylic acid series high polymer absorbent resin is provided with the macromolecular weight, the high water absorption ratio, the wide usage on industry, agriculture, general goods, medical treatment or the like.

Description

technical field [0001] The invention relates to the field of materials, in particular to a method for synthesizing persimmon tannin solution-acrylic polymer water-absorbing resin. Background technique [0002] In the prior art, the synthesis method of the acrylic polymer water-absorbing resin mainly adopts solution polymerization, reverse suspension polymerization and other methods. Solution polymerization is easy to operate and has no environmental pollution. The disadvantage is that the heat generated by the reaction is difficult to dissipate. The traditional inverse suspension polymerization method uses very little surfactant, which is generally used as a suspending agent, which makes the synthetic polymer water-absorbent resin too high in viscosity. , after absorbing water, the molecular chains cannot be dispersed, and they are in the form of agglomerates (see figure 1 ), the resulting consequences are often difficult to carry out in a common reactor, the post-treatment...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/06C08F2/44C08F2/26C08F6/12
Inventor 王勇张联盟万涛邢凯华邓雷
Owner WUHAN UNIV OF TECH