Method for preparing cellulose porous adsorption material

By adding diglycidyl ether to the NaOH/urea/H2O solvent system for cellulose cross-linking, regeneration and purification, a high-performance cellulose porous adsorbent material is prepared, which solves the problem of hardness and poor stability of cellulose foam materials. , realizing the preparation of efficient and environmentally friendly cellulose porous materials.

CN104387609AActive Publication Date: 2015-03-04INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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Patent Information

Application Number
CN201410664910.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2014-11-18
Publication Date
2015-03-04
Estimated Expiration
2034-11-18

AI Technical Summary

Technical Problem

Existing cellulose foam materials have shortcomings such as hardness, poor stability, and complex preparation, making it difficult to meet the demand for efficient, safe, and environmentally friendly biomass porous adsorption materials.

Method used

The NaOH/urea/H2O solvent system is used to dissolve cellulose, and diglycidyl ether is added as a cross-linking agent to form a cellulose gel through a cross-linking reaction, which is then regenerated and purified in a dilute acid solution, and finally dried. Processing to prepare cellulose porous adsorbent materials avoids the use of pore-forming agents and other additives.

Benefits of technology

Cellulose porous materials with good stability, good elasticity, smooth surface, low density, large specific surface area and high water absorption performance are prepared, which solves the problems of hardness and poor stability of traditional materials, and the process is simplified, environmentally friendly and non-toxic.

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Abstract

The invention discloses a novel method for preparing a cellulose porous adsorption material. The method comprises the steps of dissolving the cellulose raw material in a NaOH / ure / H2O solvent system to form a cellulose solution, and then carrying out crosslinking reaction on the cellulose solution and diglycidyl ether, washing with water for purification and then drying to obtain the cellulose porous adsorption material. Compared with the prior art, the method has the remarkable advantages that the cellulose with good stability, good elasticity, flat surface, high integrity, low density, large specific surface area and high water absorption is produced based on crosslinking in a strong alkali system.
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