Cellulose-based multifunctional absorbing material and preparation and application methods thereof

A cellulose-based, adsorption material technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve problems such as the difficulty of compounding hydrophobic materials, and achieve excellent adsorption capacity, excellent mechanical properties, and good mechanical properties. intensity effect

Pending Publication Date: 2019-04-05
BEIJING UNIV OF CHEM TECH
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, since the prepared nanocellulose is dispersed in water or other polar solvents in the form of nanofibers or nanocrystals, it must be combined with other mechanical support materials for practical use; at the same time, since the dispersion medium of nanocellulose is mainly water , it is quite difficult to compound with hydrophobic materials

Method used

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  • Cellulose-based multifunctional absorbing material and preparation and application methods thereof
  • Cellulose-based multifunctional absorbing material and preparation and application methods thereof
  • Cellulose-based multifunctional absorbing material and preparation and application methods thereof

Examples

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Effect test

example 1

[0032] Example 1: Preparation of cellulose-based multifunctional absorbent cloth: A certain amount of gauze (or cotton cloth) is placed in water dissolved with an appropriate amount of TEMPO and NaBr, and a predetermined amount of NaClO solution is added to keep the pH of the system at about 11. After reacting for a certain period of time, add ethanol to terminate the reaction, filter, wash with deionized water until neutral, and dry. Put the product in a certain amount of NaIO 4In aqueous solution, room temperature or heating reaction for 12 to 48 hours. The product was filtered, washed, and dried to obtain a cellulose-based multifunctional adsorption cloth oxidized by TEMPO / NaIO4.

example 2

[0033] Example two: reverse the oxidation process in example one, that is, carry out NaIO first 4 oxidation, followed by a brief TEMPO oxidation process to give NaIO 4 / TEMPO oxidized cellulose-based multifunctional absorbent cloth, both of which have different surface carboxyl and aldehyde content.

example 3

[0034] Example 3: Will go through TEMPO, NaIO 4 The oxidized cloth is observed with SEM, see as figure 1 The fiber morphology shown. It can be seen that by adjusting the degree of oxidation, the cotton cloth or gauze can keep the original shape basically unchanged, that is, maintain the original mechanical strength, but introduce functional groups such as carboxyl and aldehyde groups on the surface. from figure 1 It can also be seen that the first NaIO 4 The surface morphology of the cellulose adsorption cloth obtained by oxidation and then TEMPO oxidation changed greatly, which meant a higher degree of surface functionalization.

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Abstract

The invention relates to a cellulose-based multifunctional absorbing material and preparation and application methods thereof. The preparation method comprises performing TEMPO (tetramethylpiperidine-1-oxyl) oxidation/NaIO4 oxidation or NaIO4 oxidation/TEMPO oxidation sequentially on cellulose-based materials such as cotton cloth, gauze linen, and then performing further surface grafting modification to obtain a multifunctional absorbing fabric in a submicrometer and nanometer structure. The multifunctional absorbing fabric contains special functional groups such as carboxyl, aldehyde, amido,sulfydryl, sulfon, cyan and acylamino and can be applied to the fields of absorbing heavy metal ions such as lead ions and dichromic ions in polluted water, dyes such as methylene blue and acid yellow, ethyl alcohol in yellow rice wine to reduce alcoholic strength and the like.

Description

technical field [0001] The present invention relates to the technical field of preparation of cellulose-based multifunctional materials, in particular to a cellulose-based multifunctional adsorption cloth and its preparation method and application. The original cellulose base cloth is used as a raw material, which is sequentially oxidized by TEMPO / NaIO 4 Oxidation or NaIO 4 Oxidation / TEMPO oxidation process prepared by the multi-functional adsorption cloth containing carboxyl, aldehyde, hydroxyl; on this basis, further through the surface grafting method to introduce amino, mercapto, sulfonic acid, cyano, amido and other Functional groups to prepare multifunctional adsorption materials for heavy metal ions and small organic molecules. Background technique [0002] Cellulose-based materials are widely used in various aspects of human clothing, food, housing, and transportation. For example, clothing includes textile materials such as cotton cloth and linen cloth, as well...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/20C02F101/22C02F101/30C02F101/34C02F101/36C02F101/38
CPCB01J20/22B01J20/24B01J20/28011C02F1/286C02F2101/20C02F2101/22C02F2101/308C02F2101/34C02F2101/36C02F2101/38C02F2101/40
Inventor 马洪洋
Owner BEIJING UNIV OF CHEM TECH
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