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Simple, convenient and rapid preparation method of cellulose nanofiber

A nanofiber and cellulose technology, applied in the field of cellulose nanomaterial preparation, can solve the problems of high cost and complicated preparation process, and achieve the effect of low price, complicated preparation process and easy large-scale promotion

Active Publication Date: 2014-02-12
SHENZHEN YOUPUHUI PHARM CO LTD
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a simple and fast method for preparing cellulose nanofibers in order to obtain cellulose nanofibers with high aspect ratio and solve the problems of complicated preparation process and high cost

Method used

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  • Simple, convenient and rapid preparation method of cellulose nanofiber
  • Simple, convenient and rapid preparation method of cellulose nanofiber

Examples

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with specific examples, but the present invention is not limited to the following examples, and the chemical reagents and raw materials used in the following examples are all analytically pure.

[0019] Example:

[0020] (1) 7 grams of sisal microcrystalline cellulose is added with deionized water to stir and disperse, and it is filtered to dry and weighed by wet weight, and the water absorption weight is denoted as m.

[0021] (2) Add 3.5 g of sodium hydroxide and (31.5-m) g of deionized water into the three-necked flask, and after the sodium hydroxide is completely dissolved, add 350 ml of absolute ethanol under ultrasonic dispersion, and mix it evenly to prepare A light blue solution was obtained.

[0022] (3) adding the sisal microcrystalline cellulose dried by suction filtration in step (1) to the light blue solution obtained in step (2), stirring evenly, alkalizing at 30° C. for 30 minutes, th...

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Abstract

The invention discloses a simple, convenient and rapid preparation method of a cellulose nanofiber. The method comprises the steps that surface carboxylation treatment is performed on microcrystalline cellulose by a chemical reagent, so that the surface of the microcrystalline cellulose is covered with a certain amount of carboxylate radical ions; an aqueous suspension of the microcrystalline cellulose after carboxylation is stirred at a high speed; then the cellulose nanofiber with a high length-diameter ratio is obtained. The method is suitable for carboxylation and nanocrystallization processes of cellulose protoplasm prepared from various natural plants, and facilitates large-scale popularization; all reagents used in the method are common reagents and are low in price; a preparation process is simple, convenient and rapid; the obtained cellulose nanofiber has an ultrahigh length-diameter ratio; the problems of complicated preparation process, high cost and the like of the current cellulose nanofiber are solved.

Description

technical field [0001] The invention belongs to the technical field of cellulose nanomaterial preparation, and in particular relates to a method for preparing cellulose nanofibers with a high aspect ratio by using microcrystalline cellulose extracted from natural fiber plants as a raw material. Background technique [0002] In order to deal with the problems of energy, resources and the environment in today's world, the development of green, environmentally friendly, renewable and degradable materials has become a hot topic. Cellulose, which can be extracted from natural plants, is the most abundant natural polymer on earth and has the advantages of being renewable, biodegradable and biocompatible. Different extraction methods can be used to obtain cellulose with different shapes, mainly including microcrystalline cellulose, cellulose microfibrils, and cellulose nanocrystals. Especially important is cellulose nanocrystal, whose diameter is about several to ten nanometers, a...

Claims

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Application Information

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IPC IPC(8): D01F2/00C08B11/12
Inventor 刘红霞王林冲耿思敏
Owner SHENZHEN YOUPUHUI PHARM CO LTD
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