Method for preparing superabsorbent resin based on waste woody plant branches

A technology of superabsorbent resin and woody plants, which is applied in the field of superabsorbent resins based on waste woody plant branches, which can solve the problems of low utilization rate of waste woody plant branches, poor biodegradability, and low water absorption rate, and achieve excellent water absorption performance, The effect of low preparation cost and environmentally friendly source

Active Publication Date: 2014-02-05
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problems of poor biodegradability, high production cost, low water absorption rate and low utilization rate of existing waste woody plant branches in existing superabsorbent resins, the object of the present invention is to provide a high Water-absorbing resin method

Method used

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  • Method for preparing superabsorbent resin based on waste woody plant branches
  • Method for preparing superabsorbent resin based on waste woody plant branches
  • Method for preparing superabsorbent resin based on waste woody plant branches

Examples

Experimental program
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Effect test

Embodiment 1

[0021] 1) Wash and dry the discarded mulberry branches, then pulverize them with a plant grinder, and filter through a 100-mesh sieve to obtain mulberry branch powder with a particle size less than or equal to 0.15 mm;

[0022] 2) Put 1g of the mulberry branch powder obtained in step 1) into 25ml of deionized water;

[0023] 3) Heat the mixture of branch powder and deionized water, stir for 15 minutes, the heating temperature is 70°C, and nitrogen is introduced;

[0024] 4) Keep the heating temperature at 70°C and nitrogen gas, add 0.15g ammonium persulfate to the mixture of branch powder and deionized water for 10 min, then add 2.2g ammonium bicarbonate to 3.2g acrylic acid for neutralization, and then Add the neutralized acrylic acid and 0.8g of acrylamide for graft polymerization, then add 0.03g of N,N-methylenebisacrylamide and adjust the deionized water content of the whole reaction to 40 ml, and then react for 2 hours. A brownish-yellow gel is obtained;

[0025] 5) Tak...

Embodiment 2

[0027] 1) Wash and dry the discarded poplar branches, then pulverize them with a plant grinder, and filter through a 100-mesh sieve to obtain branch powder with a particle size less than or equal to 0.15mm;

[0028] 2) Put 1g of branch powder obtained in step 1) into 20ml of deionized water;

[0029] 3) Heat the mixture of branch powder and deionized water, stir for 30 minutes, the heating temperature is 60°C, and nitrogen is introduced;

[0030] 4) Keeping the heating temperature at 60°C and blowing nitrogen, add 0.2g ammonium persulfate to the mixture of branch powder and deionized water for 20 min, then add 3.3g ammonium bicarbonate to 4g acrylic acid for neutralization, and then add Acrylic acid and 2g of acrylamide obtained through neutralization were added for graft polymerization, then 0.05g of N,N-methylenebisacrylamide was added and the deionized water content of the whole reaction was adjusted to 30 ml, and then reacted for 2.5 hours to obtain a brown yellow gel;

...

Embodiment 3

[0033] 1) Wash and dry the discarded eucalyptus branches, then pulverize them with a plant grinder, and filter them through a 100-mesh sieve to obtain branch powder with a particle size less than or equal to 0.15mm;

[0034] 2) Put 1g of the branch powder obtained in step 1) into 30ml of deionized water;

[0035] 3) Heat the mixture of branch powder and deionized water, stir for 5 minutes, the heating temperature is 50 ° C, and pass nitrogen;

[0036] 4) Keep the heating temperature at 50°C and nitrogen gas, add 0.05g ammonium persulfate to the mixture of branch powder and deionized water for 5 minutes, then add 4.8g ammonium bicarbonate to 5g acrylic acid for neutralization, and then add Acrylic acid and 5 g of acrylamide obtained through neutralization were added for graft polymerization, then N, N-methylenebisacrylamide was added and the deionized water content of the entire reaction was adjusted to 35 ml, and then reacted for 3 hours to obtain a brown-yellow gel glue;

...

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Abstract

The invention discloses a method for preparing superabsorbent resin based on waste woody plant branches. The method comprises the following steps: washing the waste woody plant branches completely, drying, crushing by using a plant crushing machine, filtering by using a screen to obtain branch powder, placing the branch powder into deionized water, heating and maintaining the temperature, introducing nitrogen all the time and stirring; after adding an initiator, adding acyclic acid neutralized by ammonium hydrogen carbonate and acrylamide sequentially, adding a crosslinking agent, adjusting the deionized water content of the whole reaction, and conducting reaction to obtain brown yellow gel; and taking out the brown yellow gel, cutting into blocks, washing with water, and performing forced air drying at a certain temperature to obtain the superabsorbent resin. The waste woody plant branches are not subjected to further chemical treatment; the process is simple and environment-friendly; the raw materials have wide sources; high-value reutilization of the agricultural and forestry waste resources is realized; and the method has the characteristics of low cost, biodegradability and high water absorbency and is applicable in the fields of agriculture, gardening, hygiene care and the like.

Description

technical field [0001] The invention relates to a method for preparing a superabsorbent resin, in particular to a method for preparing a superabsorbent resin based on waste woody plant branches. Background technique [0002] Superabsorbent resin is a new type of functional polymer material with a three-dimensional network structure, which can absorb water hundreds to thousands of times its own weight. The absorbed water cannot be extruded by general physical methods, so it has good water retention capacity and is widely used in agriculture, horticulture, health care, medicine and industry. [0003] At present, the demand for superabsorbent resin in the world is increasing at a rate of 8% to 10% per year, and the output of polyacrylic acid superabsorbent resin accounts for 80% of the world's superabsorbent resin production, becoming the mainstream product in this industry. However, the monomers of polyacrylic acid series mainly come from the increasingly depleted petroleum r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F289/00C08F220/06C08F220/56
Inventor 姚菊明梁熙英张勇
Owner ZHEJIANG SCI-TECH UNIV
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