Method for preparing regenerated cellulose spherical aerogel modified through carboxylation

A technology of regenerated cellulose and carboxylation, applied in chemical instruments and methods, inorganic chemistry, chemical recovery, etc., can solve the problems of weak adsorption performance of cellulose airgel
CN103570967AInactive Publication Date: 2014-02-12NORTHEAST FORESTRY UNIVERSITY +1
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
NORTHEAST FORESTRY UNIVERSITY
Publication Date
2014-02-12
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention relates to a method for preparing regenerated cellulose spherical aerogel modified through carboxylation, which aims at the problem of poor adsorptive property of the cellulose aerogel prepared by the existing methods. The method comprises steps of firstly, mixing sodium hydroxide, urea and deionized water, then adding into a cellulose raw material, preparing a cellulose solution, adding the cellulose solution into a regeneration solution for solidifying, washing and obtaining spherical hydrogel; and secondly, dissolving TEMPO (tetramethyl-piperidin-1-oxyl) and sodium bromide into deionized water, adding the spherical hydrogel, then adding a sodium hypochlorite solution, regulating pH value of a system through a sodium hydroxide solution, steeping, exchanging the collected solid phase objects sequentially through absolute ethyl alcohol and a tertiary butanol solvent, then cooling, finally, freeze drying so as to finish preparing the cellulose spherical aerogel. The largest capacity of the obtained spherical aerogel in adsorbing metal ions Cu<2+> reaches 0.55m mol / g, and the adsorptive property is good.
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Description

technical field

[0001] The invention relates to a preparation method of cellulose airgel. Background technique

[0002] Airgel is a porous material in which the liquid solvent in the gel material is replaced by air without significantly changing its own network structure. In the 1930s, Kistler first synthesized SiO 2 Airgel, and then various airgel materials are gradually synthesized, such as alumina, rubber, cellulose derivatives, etc. Airgel has a unique porous structure, such as ultra-low density, high specific surface area, unique optical and acoustic properties, low dielectric constant, and extremely low thermal conductivity. Cellulose is a kind of abundant and renewable natural polymer compound, which has good biocompatibility and structural stability. Therefore, airgel materials prepared from cellulose are rich in the common characteristics of the two, and it is very feasible and practical to increase the functionality of cellulose airgel through cellulose modifica...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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