Method for synthesizing water-absorbing resin composite material by using corn bract in aqueous phase medium in one step

A technology of corn husks and water-absorbing resins, applied in separation methods, chemical instruments and methods, liquid separation, etc., can solve the problems of insufficient utilization of high-value corn husks, reduce drying energy consumption, reduce energy consumption and Cost, the effect of reducing the cost of raw materials

Inactive Publication Date: 2011-07-13
CHANGCHUN UNIV OF SCI & TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In order to solve the problem of insufficient high-value utilization of corn husks and the use of the natural structure of corn husks to make up for the shortcomings of SAP artificial synthesis, the present invention provides a method for synthesizing water-absorbent resin composite materials in one step from corn husks in an aqueous medium

Method used

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  • Method for synthesizing water-absorbing resin composite material by using corn bract in aqueous phase medium in one step
  • Method for synthesizing water-absorbing resin composite material by using corn bract in aqueous phase medium in one step
  • Method for synthesizing water-absorbing resin composite material by using corn bract in aqueous phase medium in one step

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Step 1: Prepare aqueous solutions of the four chemicals A, B, C, and D required for polymerization: Component A: 50wt% acrylic acid aqueous solution; B component: 15wt% sodium hydroxide aqueous solution; C component: 2wt % NN'-methylenebisacrylamide aqueous solution; D component: 2wt% ammonium persulfate aqueous solution.

[0037] Step 2: Cutting and drying of corn husks: cut corn husks into rectangular pieces with a width of no more than 1 cm and a length of no more than 10 cm; dry in a hot air environment at 60°C for 24 hours;

[0038]Step 3: one-step synthesis of water-absorbent resin composite material in aqueous medium: 50 grams of dried corn bract rectangular slices are soaked in 600 grams of component A for 24 hours, and then neutralized by adding 950 grams of component B. Acid-base neutralization heat is released, after the reaction system is cooled to room temperature, add 140 grams of component C, and then add 120 grams of component D, stir for 5 seconds at a ...

Embodiment 2

[0042] The difference with embodiment 1 is: in the 3rd step,

[0043] (1) Put 50 grams of corn husk rectangular slices into 650 grams of component A and soak for 24 hours.

[0044] (2) The addition amount of component B is 960 grams.

[0045] (3) The addition amount of component C is 150 grams.

[0046] (4) The addition amount of D component is 125 grams.

[0047] (5) The polymerization time is 2 hours by heating in a constant temperature water bath at 60 degrees Celsius.

[0048] The water absorption capacity of the water-absorbent resin composite material was measured by the Ni mesh method of Example 1, and the water absorption capacity of the deionized water was 295 times. The water absorption rate of "normal saline solution" is 75 times. The water absorption rate of absorbing city tap water is 261 times.

Embodiment 3

[0050] The difference with embodiment 1 is: in the 3rd step,

[0051] (1), 50 grams of rectangular corn husks were put into 700 grams of component A, ie soaked in 50 wt% acrylic acid aqueous solution for 24 hours.

[0052] (2), the addition amount of component B is 960 grams.

[0053] (3), the addition amount of C component is 160 grams.

[0054] (4), the add-on of D component is 130 grams.

[0055] (5), the polymerization time is 1.5 hours with 60 degrees centigrade constant temperature water bath heating.

[0056] The water absorption capacity of the water-absorbent resin composite material was measured by the Ni mesh method of Example 1, and the water absorption capacity of the deionized water was 280 times. The water absorption rate of "normal saline solution" is 72 times. The water absorption rate of absorbing city tap water is 258 times.

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Abstract

The invention provides a method for synthesizing a water-absorbing resin composite material by using corn bract in an aqueous phase medium in one step. The corn bract is directly added in the obtained water-absorbing resin composite material in the polymerization process, so that a short flow is realized. High-value utilization of the corn bract is realized; and the defects of an SAP (systems, applications and products) artificial synthesis structure are overcome by the natural structure of the corn bract. The corn bract accounts for 8 to 10 weight percent of the weight of the water-absorbingresin composite material dried product, so raw material cost is reduced. Due to the adoption of the natural permeable gas structure of the corn bract, the increased drying time caused by the prevention of water evaporation inside holes due to the hole closing on the outer surfaces of SPA colloidal particles after the drying of the outer surface is reduced, and energy consumption and cost are reduced. The water-absorbing resin composite material can be applied to oil-water separation of waste cooking oil; a separation effect is improved by a permeable air hole channel of the corn bract; and the percentage of dehydrated water is 42.1 percent when room temperature is 18 DEG C.

Description

technical field [0001] The invention relates to a method for one-step synthesis of a water-absorbing resin composite material from corn husks in an aqueous medium. Background technique [0002] Super-absorbent resin, or super-absorbent resin or commonly known as water-absorbent material, English is Super-absorbent Polymers (its English abbreviation is SAP). [0003] To obtain 1 ton of SAP industrial products by polymerizing acrylic acid, acrylamide, or acrylonitrile as monomers, the monomer consumption is usually more than 0.6 tons; the monomer cost accounts for the first of the raw material cost. [0004] Adding starch in the polymerization process, the obtained copolymer can increase the solid content of the product (referred to as solid content), reduce the cost per ton of SAP products, and improve the competitiveness of SAP products used in industries such as physiological and hygienic products. The method of adding starch in the polymerization to increase the solid con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F291/08C08F220/06B01D17/022
Inventor 杨秀云吴耀明李云辉孙连山徐淑芝高阳姚海波金艳秋王立民
Owner CHANGCHUN UNIV OF SCI & TECH
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