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Ion-imprinted nanocellulose adsorbing material and preparation method and application thereof

A technology of nanocellulose and adsorption materials, which is applied in the field of ion-imprinted nanocellulose adsorption materials and its preparation, can solve problems such as nanocellulose preparation methods that have not been seen before, and achieve high selectivity, large specific surface area, and high adsorption Effect

Inactive Publication Date: 2017-09-08
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the literature search of the prior art has found that there has been no report on "the preparation method of nanocellulose with mercury, lead and copper ion holes".

Method used

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  • Ion-imprinted nanocellulose adsorbing material and preparation method and application thereof
  • Ion-imprinted nanocellulose adsorbing material and preparation method and application thereof
  • Ion-imprinted nanocellulose adsorbing material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Disperse 1g of nanocellulose in 200ml of water, then add 0.7g of potassium periodate, stir the reaction under light-shielding conditions, add 10ml of ethylene glycol after the reaction is completed, and wash the reaction product to obtain oxidized Nanocellulose;

[0039] (2) Disperse the oxidized nanocellulose in step (1) in 200ml of water, then add 10ml of anhydrous ethylenediamine, stir and react at 30°C, and wash the reaction product with distilled water to obtain aminated nanocellulose;

[0040] (3) the aminated nanocellulose of step (2) is dispersed in 200ml water, then adding mass fraction is 10% potassium thiocyanate solution (mass ratio=1:1 of potassium thiocyanate and nanocellulose) and 10ml of 0.1M hydrochloric acid, stirred and reacted at 30°C, washed with distilled water after the reaction, to obtain nanocellulose with a thiourea structure;

[0041] (4) uniformly disperse the nanocellulose with thiourea structure in step (3) in water, then add the mercu...

Embodiment 2

[0053] (1) Disperse 1g of nanocellulose in 200ml of water, then add 1g of potassium periodate, stir the reaction under light-shielding conditions, add 10ml of ethylene glycol to terminate the reaction, and wash the reaction product to obtain oxidized nanocellulose cellulose;

[0054] (2) Disperse the oxidized nanocellulose in step (1) in 200ml of water, then add 10ml of anhydrous ethylenediamine, stir and react at 30°C, and wash the reaction product with distilled water to obtain aminated nanocellulose;

[0055] and 10ml of 0.1M hydrochloric acid, stirred and reacted at 30°C, washed with distilled water after the reaction, to obtain nanocellulose with a thiourea structure;

[0056] (4) step (3) nano cellulose with thiourea structure is evenly dispersed in water, then add lead nitrate aqueous solution (with lead nitrate as solute, according to the total amount of lead ions) that is 1.25:10 with the total mass ratio of nano cellulose Mass calculation, the total mass ratio of l...

Embodiment 3

[0067] (1) Disperse 1g of nanocellulose in 200ml of water, then add 1.3g of potassium periodate, stir the reaction under light-shielding conditions, add 10ml of ethylene glycol after the reaction is completed, and wash the reaction product to obtain oxidized Nanocellulose;

[0068] (2) Disperse the oxidized nanocellulose in step (1) in 200ml of water, then add 10ml of anhydrous ethylenediamine, stir and react at 30°C, and wash the reaction product with distilled water to obtain aminated nanocellulose;

[0069] (3) the aminated nanocellulose of step (2) is dispersed in 200ml of water, then adding mass fraction is 15% potassium thiocyanate solution (mass ratio=1.5:1 of potassium thiocyanate and nanocellulose) and 10ml of 0.1M hydrochloric acid, stirred and reacted at 30°C, washed with distilled water after the reaction, to obtain nanocellulose with a thiourea structure;

[0070] (4) step (3) nano cellulose with thiourea structure is evenly dispersed in water, then add copper ch...

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Abstract

The invention belongs to the technical field of adsorbing materials, and discloses an ion-imprinted nanocellulose adsorbing material and a preparation method and application thereof. The preparation method comprises the following steps of conducting oxidation modification with potassium periodate, amination modification with ethylenediamine, and thiocarbamide modification with potassium thiocyanate on nanocellulose successively, adding an imprinting metal ion solution and a formaldehyde solution, conducting a cross-linking polymerization reaction with stirring, immersing the polymerization products into an acid solution to remove imprinting metal ions, and obtaining the ion-imprinted nanocellulose adsorbing material. The ion-imprinted nanocellulose adsorbing material has high adsorbability and selectivity for metal ions, and can be used for removing and recycling metal ions, such as mercury ions, lead ions and copper ions.

Description

technical field [0001] The invention belongs to the technical field of adsorption materials, and in particular relates to an ion-imprinted nano-cellulose adsorption material and its preparation method and application. Background technique [0002] Due to the rapid development of industrialization, the content of heavy metals in water continues to increase, seriously polluting the environment. Among them, the pollution of mercury, lead and copper are the more serious ions. Among them, mercury poisoning can cause brain damage, liver and kidney failure and irreversible neurological damage. The mercury in the environment mainly comes from the products of coal combustion and the chlor-alkali industry. discharge, etc. The removal of mercury in water sources generally adopts coagulation method, chemical precipitation method, ion exchange method, reverse osmosis method, adsorption method and so on. Among these methods, the directional removal of mercury in water sources using nano...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C08B15/02C08B15/06C08B15/10
CPCB01J20/24B01J20/28007C02F1/286C08B15/02C08B15/06C08B15/10
Inventor 王习文江嘉灏
Owner SOUTH CHINA UNIV OF TECH
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