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Preparation method of pomace based super absorbent resin

A superabsorbent resin and pomace-based technology, applied in the field of water-absorbent materials, can solve problems such as long reaction time, high impurity content in products, and chemical pollution, and achieve the effects of reducing the intensity of drying treatment, fast response, and high thermal efficiency

Active Publication Date: 2017-07-21
天津市农业科学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nitrogen protection is required during the reaction, and the reaction time is long
In addition, the initiators used to initiate the polymerization reaction are mostly persulfate (potassium, sodium or ammonium salt), ammonium cerium nitrate, potassium permanganate, thiosulfate, etc. After the reaction, these salts are mixed in the product, so that The impurity content of the product is high, which needs to be cleaned and removed, causing chemical pollution, and the safety and environmental protection requirements are high during the preparation process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Use apple pomace to prepare superabsorbent resin, the monomer is acrylic acid, and the steps are as follows:

[0038] (1) Pomace miniaturization treatment: fresh apple pomace is dried at 70°C, crushed, and passed through a 100-mesh sieve to obtain dry pomace powder.

[0039] (2) Material preparation: Take 2g of dried pomace powder and put it in a beaker, add acrylic acid solution, 30% hydrogen peroxide solution and 0.5% N,N '-Methylenebisacrylamide solution, mix thoroughly. The ratio of various substances in the above materials is: the mass ratio of pomace to monomer is 1:1, the molar ratio of hydrogen peroxide to monomer is 0.08:1, N,N'-methylenebisacrylamide and mono The mass ratio of the body is 0.005:1.

[0040] (3) Place the prepared material in a microwave oven (700W, 2450MHz), and carry out graft copolymerization reaction under microwave radiation. The microwave method is microwave radiation for 10 seconds with an interval of 20 seconds. After reacting for 5 ...

Embodiment 2

[0044] Use apple pomace to prepare superabsorbent resin, the monomer is acrylic acid, and the steps are as follows:

[0045] (1) Pomace miniaturization treatment: take fresh apple pomace, add 2 times the volume of water, use colloidal grinding to grind the pomace pulp, and then process it with a high-pressure homogenizer with a homogenization pressure of 30Mpa to obtain micronized pomace pulp .

[0046](2) Material preparation: take pomace pulp with a solid content of 2g, put it in a beaker, add acrylic acid solution, 30% hydrogen peroxide solution and 1% N,N'-methylenebisacrylamide solution, mix well. The ratio of various substances in the above materials is: the mass ratio of pomace and acrylic acid is 1:1, the molar ratio of hydrogen peroxide and acrylic acid is 0.08:1, the mass ratio of N,N'-methylenebisacrylamide and acrylic acid The ratio is 0.005:1.

[0047] (3) Place the prepared material in a microwave oven (700W, 2450MHz), and carry out graft copolymerization reac...

Embodiment 3

[0051] In this embodiment, except that the mass ratio of pomace and monomer is 0.5:1, the others are the same as in Embodiment 1. The water absorption capacity of the obtained superabsorbent resin was 296 g / g.

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Abstract

The invention discloses a method for preparing a super absorbent resin through the microwave radiation synthesis technique, and a pomace is taken as the raw material. The method is high in reaction speed, and the reaction process does not need the protection of nitrogen. The obtained product is not polluted by the residue of an initiator, is high in water absorption capability, is suitable for the fields of agriculture, gardening and hygiene care, and realizes the high-valued recycling of waste resources.

Description

technical field [0001] The invention relates to the field of water-absorbing materials, in particular to a preparation method of pomace-based superabsorbent resin. Background technique [0002] Superabsorbent resin is a kind of polymer with many hydrophilic groups and a three-dimensional network structure, which can absorb water tens to thousands of times its own weight, and the moderately cross-linked three-dimensional network structure makes it The absorbed water cannot be extruded by general physical methods, so superabsorbent resin has the characteristics of large water absorption and strong water retention, and has a wide range of uses in agriculture, horticulture, health care, medicine and industry. For example, in the agricultural field, when fertilization, irrigation or rainfall, the superabsorbent resin in the soil can quickly absorb water and fertilizer, reducing the leaching loss of water and fertilizer; Slowly released in the medium, so as to improve the effic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/02C08F220/06C08F220/56C08F2/46C08F289/00
CPCC08F2/46C08F251/02C08F289/00C08F220/06
Inventor 张峻杨丽维陈颖
Owner 天津市农业科学院
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