Process for preparing composite water uptaking material

A technology for water-absorbing materials and aqueous solutions, applied in separation methods, chemical instruments and methods, other chemical processes, etc., can solve the problems of high cost, complex process, negative impact on water absorption performance, etc., and achieves low cost, simple process, and high water absorption rate. control effect

Inactive Publication Date: 2005-04-20
董建新
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When there are many materials, especially in industrial production, a large amount of polymerization heat cannot be removed in time, and implosion will inevitably occur, which not only easily leads to danger, but also increases the possibility of chain transfer when the temperature is too high, resulting in a decrease in molecular weight and damage to water absorption performance. Negative impact
[0003] In 1994, pages 46-49 of the fifth issue of "Macromolecular Materials Science and Engineering" disclosed a reversed-phase suspension polymerization method, but the ratio of the oil phase to the water phase in the method system was relatively large, and the initiator was input at one time. Under higher temperature conditions, detonation will also occur, causing danger
Moreover, the process is complicated and the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The bentonite dry powder is formulated into a 50% aqueous solution, and placed at room temperature for 24 hours to allow it to fully absorb water to form a semi-solid homogeneous system. Take 50 grams of bentonite aqueous solution with a concentration of 50% and mix it with 50 grams of acrylamide with a concentration of 30%. At the same time, add 4 milliliters of 30% NaOH and 1 milliliter of N-N methylenebisacrylamide with a concentration of 1PPM, and stir fully to form a semi-solid homogeneous phase system, and then placed in constant temperature water at 40°C 60 Polymerization under CO-γ-ray irradiation. After polymerization, the offset plate was pulverized, dried in an oven at 120° C., and pulverized into particles.

Embodiment 2

[0016] The dry bentonite powder is formulated into a 30% aqueous solution, and left at room temperature for 20 hours to allow it to fully absorb water to form a semi-solid homogeneous system. Take 20 grams of bentonite aqueous solution with a concentration of 30% and mix it with 80 grams of acrylamide with a concentration of 30%. At the same time, add 10 milliliters of NaOH with a concentration of 0.5% and 0.5 milliliters of N-N methylene bisacrylamide with a concentration of 2PPM. Solid homogeneous system, then placed in 40 ℃ constant temperature water 60 Polymerization under CO-γ-ray irradiation. After polymerization, the offset plate was pulverized, dried in an oven at 120° C., and pulverized into particles.

Embodiment 3

[0018] The talc dry powder is formulated into a 30% aqueous solution, and left at room temperature for 20 hours to allow it to fully absorb water to form a semi-solid homogeneous system. Take 40 grams of 30% talcum powder aqueous solution and 60 grams of 30% acrylamide, and add 5 milliliters of 10 percent NaOH solution and 1 milliliter of N-N methylene bisacrylamide at 1PPM. Stir to form a semi-solid homogeneous system, and then place it in 40°C constant temperature water 60 Polymerization under CO-γ-ray irradiation. After polymerization, the offset plate was pulverized, dried in an oven at 120° C., and pulverized into particles.

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PUM

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Abstract

Said invention discloses a method for preparing a simple process, low cost and water absorption magnification controllable composite water absorption material. The process contains mixing bentonite and talcum powder solution with acrylamide solution added with NaOH and N-N methylene biacrylamide, forming homogeneous semisolid system by stirring, through #+[60]CO-'gamma'ray radiation polymerizing, jellygraph granulating, drying, and pulverizing to obtain the grain, the proportion of bentonite, talcum powder and acrylamid is 20:80-80:20, the concentration of bentonite, talcum powder is 10-50 %, the concentration of acrylamide is 20-30 %.

Description

technical field [0001] The invention relates to a preparation method of a polymer material, more specifically, to a preparation method of a water-absorbing material. Background technique [0002] At present, superabsorbent materials have the advantages of strong water absorption capacity, good water retention, and no dehydration under a certain pressure after absorbing water, and have been widely used. In the prior art, high-composite adsorption materials are prepared by aqueous solution polymerization and reverse-phase suspension polymerization. In the water-soluble polymerization method, the chemical initiation polymerization of water-soluble monomers mostly uses a single-component thermal decomposition initiator, so that the temperature required for initiation is relatively high. As the temperature of the system is high, the decomposition speed of the initiator is also increased, and the polymerization speed is increased. When there are many...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/28B01J20/26
Inventor 董建新
Owner 董建新
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