Method for preparing water-absorbent resin from waste macromolecular polymer

A technology of high molecular polymer and water-absorbent resin, which is applied in the field of preparing water-absorbent resin by using waste high-molecular polymer, can solve the problems of cumbersome process, complex structure, low utilization rate, etc., and achieves the advantages of simple process, simplified reaction equipment and energy saving. Effect

Inactive Publication Date: 2018-09-14
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at practical problems such as complex structure, cumbersome process, high cost, low utilization rate and easy to cause secondary pollution of the recycling system of waste high molecular polymer, the present invention provides a process for preparing multifunctional water-absorbing resin by utilizing waste high molecular polymer materials. Realized the high value-added resource utilization of waste polymer materials

Method used

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  • Method for preparing water-absorbent resin from waste macromolecular polymer
  • Method for preparing water-absorbent resin from waste macromolecular polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] according to figure 1 Flow chart, take 1.00g of waste mixed plastic after washing, drying, shearing and crushing, and dissolve it completely in 0.02L xylene at 115°C under stirring conditions. Then add 0.30g emulsifier span60, after stirring for 10 minutes, add 0.045g initiator benzoyl peroxide dissolved in 4.20ml xylene, continue stirring for 10 minutes, and close the reaction kettle. Lower the system temperature to 95°C, then slowly add 8.00g of acrylic acid solution neutralized to 80% by NaOH dropwise, stir at 400rpm for 10 minutes, then add 1.00mL of 0.20g / mL N,N-methylenebisacrylamide solution , adjust the system oil-water volume ratio to 1.1:1.0. Continue to stir for 15 minutes, reduce the stirring speed to 200 rpm, and react for 3 hours, take out the product, wash with ethanol and water, dry at 80°C to constant weight, grind and sieve. The water absorption capacity of the product in distilled water and tap water are 239.07g / g and 97.36g / g respectively.

Embodiment 2

[0025] according to figure 1 Flowchart, take 1.00g of the above-mentioned waste mixed plastics, and dissolve them completely in 0.02L of xylene under stirring at 115°C. Then add 0.36g emulsifier span60, stir for 10 minutes, then add 0.048g initiator benzoyl peroxide dissolved in 5.22ml xylene, stir for 10 minutes, then close the reactor. When the temperature of the system drops to 95°C, slowly add 8.00 g of acrylic acid solution neutralized to 85% by NaOH dropwise, stir at 400 rpm for 10 minutes, then add 1.00 mL of 0.20 g / mL N,N-methylenebisacrylamide solution, Adjust the system oil-water volume ratio to 1.1:1.0. Continue to stir for 15 minutes, reduce the stirring speed to 250 rpm, and react for 3 hours, take out the product, wash with ethanol and water, dry at 80°C to constant weight, grind and sieve. The water absorption capacity of the product in distilled water and tap water are 310.02g / g and 116.12g / g respectively.

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Abstract

The invention provides a process for preparing multifunctional water-absorbent resin from waste macromolecular materials and aims at practical problems of complex recovery process, high cost, proneness to secondary pollution and the like of a traditional waste macromolecular polymer recovery process. The process includes a dissolution procedure, an emulsification initiating procedure, a graft copolymerization procedure, a cross-linking reaction procedure and a product purification procedure. The synthesized novel material is efficient in moisture absorption performance, great in moisture retention capacity and high in recyclability and has a high application value in fields of agriculture and forestry gardening, environmental pollution control, building interior curing agents, drying agents and the like.

Description

technical field [0001] The invention relates to a method for regenerating and transforming multifunctional water-absorbing resins by using waste high molecular polymers, which belongs to the new technology of solid waste recycling in the field of environmental protection and resource comprehensive utilization, and is especially suitable for using polyethylene, polypropylene and polystyrene Resource recovery and recycling of mixed high molecular polymers. Background technique [0002] Waste polymers mainly include waste plastics, waste rubber and waste textiles, among which waste plastics account for the largest proportion. Due to the large-scale production and consumption of plastic products, a large amount of waste plastics are produced after use and disposal. According to reports, waste plastics account for about 8-12% of municipal waste in different countries around the world. Municipal plastics usually have complex components, mainly composed of low-density polyethylen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F255/02C08F257/02C08F220/06C08F222/38
CPCC08F255/02C08F257/02C08F220/06
Inventor 张付申张军平
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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