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Amination-enhanced modified straw based composite material and preparation method thereof

A technology for modifying straw and composite materials, which is applied in the direction of chemical instruments and methods, and other chemical processes, and can solve the problems of water resource reuse, troublesome operation and management, and high operating costs, and achieve fast adsorption speed, Improves the uniformity and durability, and the effect of wide application

Active Publication Date: 2015-01-21
重庆鼎信塑料制品有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are many methods to control water pollution. The traditional ones include chemical precipitation method, redox method, ferrite method, electrolysis method, evaporation concentration method, ion exchange resin method, etc. Troublesome, and will produce secondary pollution and can not solve the problem of water resource reuse and so on

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Slowly add 0.85g of aminated modified straw, 0.05g of graphene oxide, and 0.1g of sodium alginate into 10ml of deionized water, ultrasonicate for 1 hour, add 0.2ml of 5wt% calcium chloride solution, mix and stir , add dropwise 5ml of 1mmol / ml acetic acid solution to the composite solution, stir for 30min, then transfer to the mold to stand for crosslinking for 12h, and wash repeatedly with distilled water. Under the temperature condition of -50°C, the temperature was raised to room temperature at a rate of 1°C / min, and then dried for 12 hours to obtain aminated modified straw / graphene oxide / cyclodextrin composite material

Embodiment 2

[0018] Slowly add 0.9g of aminated modified straw, 0.05g of graphene oxide, and 0.05g of calcium alginate into deionized water with a bath ratio of 20ml, ultrasonicate for 24 hours, add 0.5ml of 2wt% calcium chloride solution, and mix After stirring, 10ml of 1mmol / ml acetic acid solution was added dropwise to the composite solution, stirred for 60min, then transferred to a mold to stand for crosslinking for 24h, and washed repeatedly with distilled water. Under the temperature condition of -30°C, the temperature was raised to room temperature at a rate of 1°C / min, and then dried for 10 hours to prepare the amination-enhanced modified straw / graphene oxide / cyclodextrin composite material.

Embodiment 3

[0020] Slowly add 0.8g of amination-enhanced modified straw, 0.1g of graphene oxide, and 0.1g of potassium alginate into deionized water with a bath ratio of 15ml, ultrasonicate for 4 hours, add 2ml of 1wt% calcium chloride solution, and mix and stir Finally, 8ml of 1mmol / ml acetic acid solution was added dropwise to the composite solution, stirred for 120min, then transferred to a mold to stand for crosslinking for 48h, and washed repeatedly with distilled water. Under the temperature condition of -20°C, the temperature was raised to room temperature at a rate of 1°C / min, and then dried for 24 hours to prepare the amination-enhanced modified straw / graphene oxide / cyclodextrin composite material.

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Abstract

The invention relates to an amination-enhanced modified straw based composite material and a preparation method thereof. The preparation method comprises the following steps of slowly adding the following components in parts by weight: 80-90 parts of amination-enhanced modified straw, 1-10 parts of oxidized graphene and 1-10 parts of alginate into deionized water with the bath ratio of 1 to (10-20), and carrying out ultrasonic treatment for 1-24h; and then, carrying out calcium ion crosslinking and freeze drying to obtain the amination-enhanced modified straw / oxidized graphene / alginate composite material. According to the invention, the amination-enhanced modified straw / oxidized graphene / alginate composite material is prepared by loading oxidized graphene and the alginate on the amination-enhanced modified straw serving as a carrier, and then, carrying out calcium ion crosslinking and freeze drying. The composite material has the advantages of environmental friendliness, good mechanical property, regular structure, high porosity and adsorption capacity, high adsorption speed, wide application range, simplicity in desorption, reutilization and the like.

Description

technical field [0001] The invention belongs to the technical field of functional materials, in particular to an amination-enhanced modified straw-based composite material and a preparation method thereof. Background technique [0002] The amount of crop straw resources in my country ranks first in the world. The sown area of ​​grain in my country is about 113 million hm 2 , the total grain output is 490 million tons, and the total output of corn, wheat and other cereal straws is 500 million tons. Adding the straw of other crops, the annual output of straw is more than 600 million tons. Although 250 million tons are used to make fertilizer and return to the field; 48 million tons are used for industrial raw materials; 180 million tons are used for farmers' living fuel, but there are still 120 million tons of straw remaining, which become domestic garbage or are burned in vain. Crop straw is the largest renewable resource on the earth and an important by-product of crops. I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30
CPCB01J20/20B01J20/22B01J20/223B01J20/24
Inventor 赵兵
Owner 重庆鼎信塑料制品有限责任公司
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