Method for preparing modified chitosan sponge structure material and appliance

A structural material, chitosan technology, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve toxic reagents, difficult material molding, low adsorption efficiency, harsh reaction conditions, etc. problems, to achieve the effect of increasing active adsorption sites, not easy to dissolve, and simple reagents

Active Publication Date: 2015-11-18
NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problems of harsh reaction conditions, high reaction temperature, complex process, use of toxic reagents, difficult material molding, low yield and low adsorption efficiency in the existing chitosan modification method, and provides a modified chitosan Preparation method and application of polysaccharide sponge structure material

Method used

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  • Method for preparing modified chitosan sponge structure material and appliance
  • Method for preparing modified chitosan sponge structure material and appliance
  • Method for preparing modified chitosan sponge structure material and appliance

Examples

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specific Embodiment approach 1

[0029] Specific embodiment one: the preparation method of a kind of modified chitosan sponge structure material described in the present embodiment is completed according to the following steps:

[0030] 1. Add chitosan and ammonium thiocyanate to absolute ethanol, condense and reflux at a temperature of 80°C to 100°C and stir for 10h to 12h to obtain a light yellow suspension;

[0031] The mass ratio of described chitosan and ammonium thiocyanate is 1:(0.5~1.0); The volume ratio of the quality of described chitosan and dehydrated alcohol is 1g:(5~10)mL;

[0032] 2. Centrifuge and filter the light yellow suspension to obtain solids, wash the solids with absolute ethanol, and dry them in an oven at a temperature of 40°C to 80°C to obtain light yellow powdered thiourea chitosan ;

[0033] 3. Add light yellow powdered thiourea chitosan to NaOH solution with a mass fraction of 10% to 20% to obtain a reaction solution, and then add CS to the reaction solution 2 , and at a tempera...

specific Embodiment approach 2

[0040] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the mass ratio of chitosan and ammonium thiocyanate described in step one is 1:0.944. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0041] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the quality of chitosan described in step one and the volume ratio of dehydrated alcohol are 1g:9.32mL. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a method for preparing a modified chitosan sponge structure material and an appliance, which relate to a method for preparing the modified chitosan sponge structure material and the appliance, and aim to solve the problems that existing chitosan modification methods are harsh in reaction conditions, high in reaction temperature, detailed and complicated in process, difficult in using of noxious reagent and forming of materials, low in yield and low in adsorption efficiency. The method for preparing the modified chitosan sponge structure material comprises steps: 1 preparation of pale yellow suspensions; 2 preparation of light yellow powder thiourea chitosan; 3 preparation of orange suspension; 4 preparation of washed solid product; and 5 freezing and drying, thereby completing the method for preparing the modified chitosan sponge structure material. The method for preparing the modified chitosan sponge structure material and the appliance are used to modify the modified chitosan sponge structure material.

Description

technical field [0001] The invention relates to a preparation method and application of a modified chitosan sponge structure material. Background technique [0002] With the continuous development of science and technology and the increasing renewal of industrial production, toxic or potentially toxic chemicals in the environment, especially heavy metals, pose a serious threat to humans and the environment. Among these heavy metals, lead is due to its non-degradability and Bioaccumulation, its hazards are particularly prominent. In addition to the dissolution of lead from rock minerals into the water body, waste water from lead smelting enterprises and processing waste water from the production of lead-containing compounds are continuously discharged into the water body, and the safe concentration of lead to aquatic organisms is 0.16mg / L, the maximum acceptable concentration of lead in tap water 0.05mg / L. As we all know, lead can enter the body through the skin, digestive ...

Claims

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Application Information

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IPC IPC(8): C08J9/00C08L5/08C08K3/30C08B37/08B01J20/24B01J20/30C02F1/28C02F1/62
Inventor 于洪文王娜娜
Owner NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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