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Method for preparing cellulose nanoparticles through dialdehyde cellulose

A nanoparticle and cellulose technology, which is applied in the field of cellulose nanoparticle and its preparation, can solve the problems of complex cellulose nanoparticle process and uncontrollable particle size, and achieve the effects of high yield, fast speed and fast response

Active Publication Date: 2018-10-19
JIANGXI NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process of preparing cellulose nanoparticles by the above method is complicated, especially its particle size is uncontrollable and has no stimulus response to the outside world.

Method used

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  • Method for preparing cellulose nanoparticles through dialdehyde cellulose
  • Method for preparing cellulose nanoparticles through dialdehyde cellulose
  • Method for preparing cellulose nanoparticles through dialdehyde cellulose

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: Preparation of dialdehyde-based fibers

[0021] 1.0 grams of cellulose, 1.65 grams of sodium periodate (NaIO 4 ) and 50ml of deionized water were added to a 250ml flask, and the flask was wrapped with tinfoil for shading, and stirred magnetically at 250rpm at room temperature for 3 days. Ethylene glycol was added to the mixture and stirred for 1 hour to eliminate unreacted sodium periodate; then the contents of the flask were added to a 3500Da dialysis bag and dialyzed in deionized water, and the dialyzed suspension was heated to 80°C and Keep it for 4 hours; then centrifuge it at 14000 rpm for 30 minutes, put it in the upper layer of the refrigerator and let it stand still, and precipitate dialdehyde-based cellulose with an oxidation value of 1.57 (DO=1.57), and the aldehyde group content is 9.69 mmol / g.

Embodiment 2

[0023] 0.16g of dialdehyde-based cellulose, 0.101g of n-hexylamine and 9.0ml of ethanol were added to the reaction flask, stirred at room temperature for 2 hours, and the suspension became a clear solution.

[0024] The obtained clear solution was put into a syringe pump and injected into 132ml deionized water at a speed of 0.2ml / min, wherein the deionized water was stirred at a speed of 800r / min to obtain a cellulose nanoparticle suspension with a concentration of 0.5mg / m1. Obtain the cellulose nanoparticle that particle mean diameter is 100nm, see appendix figure 1 .

Embodiment 3

[0026] 0.16 g of dialdehyde-based cellulose and 0.05 g of n-hexylamine were added to 7.5 ml of ethanol, and the reaction bottle was stirred at room temperature for 2 hours, and the suspension became a clear solution.

[0027] The obtained clear solution was put into a syringe pump and injected into 75ml of deionized water at a speed of 0.2ml / min, wherein the deionized water was stirred at a speed of 800r / min to obtain a cellulose nanoparticle suspension with a concentration of 1. Obtain the cellulose nanoparticle that particle average diameter is 78nm, see appendix figure 2 .

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Abstract

The invention discloses cellulose nanoparticles and a preparation method thereof. Dialdehyde cellulose is generated by utilizing sodium periodate oxidized cellulose; the dialdehyde cellulose and aminereact to generate Schiff base; then the Schiff base is injected into water to generate the cellulose nanoparticles; the cellulose nanoparticles have good pH (Potential of Hydrogen) responsiveness andwide application.

Description

technical field [0001] The invention belongs to the field of natural polymer materials, and in particular relates to a cellulose nanoparticle prepared by dialdehyde-based cellulose and a preparation method thereof. Background technique [0002] Cellulose is the most abundant natural renewable polymer material on the earth. Cellulose fiber has good hygroscopicity and air permeability, can be biodegraded naturally, has no irritation to the skin, and is comfortable to wear. Products, cosmetics and other fields have a wide range of applications. In addition to inheriting the advantages of a wide range of sources of cellulose materials, low cost, light weight, renewable and biodegradable, cellulose nanoparticles also have excellent properties of nanomaterials. Therefore, they can be used as high-quality reinforcing fillers in polymers and biodegradable materials, as thickeners in dispersions, and as drug carriers, among other applications. Traditional methods include chemical a...

Claims

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Application Information

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IPC IPC(8): C08J3/14C08L1/08C08B15/06C08B15/02A61K47/38
CPCA61K47/38C08B15/02C08B15/06C08J3/14C08J2301/08
Inventor 彭信文张凯
Owner JIANGXI NORMAL UNIVERSITY
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