Preparing method for dialdehyde nano-crystalline cellulose

A technology of nanocellulose and dialdehyde, which is applied in the field of nanomaterial preparation, can solve the problems of imperfect biomass cellulose, achieve high aldehyde content and simple preparation

Inactive Publication Date: 2016-01-20
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the development and utilization technology of biomass cellulose is not perfect at present

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A preparation method of dialdehyde nanocellulose, the operation steps are as follows:

[0017] 1. Preparation of nanocellulose: Dissolve 50 g of microcrystalline cellulose in concentrated sulfuric acid with a mass fraction of 64%, with a liquid ratio of 8.5 ml / g, stir and react at 45 ° C for 30 min, then add 4 L of deionized water to terminate the reaction, and centrifuge. The nanocellulose suspension was separated and the resulting nanocellulose suspension was washed using dialysis.

[0018] 2. Preparation of dialdehyde nanocellulose: Take 30 mL of the nanocellulose suspension obtained after cleaning in step 1, oxidize it with sodium periodate, an oxidant, and the amount of sodium periodate is 1 times the mass of cellulose. The reaction was carried out for 2h.

[0019] 3. The dialdehyde nanocellulose suspension prepared in step 2 was washed with dialysis method to obtain the dialdehyde nanocellulose, and the aldehyde content of the dialdehyde nanocellulose was determi...

Embodiment 2

[0021] A preparation method of dialdehyde nanocellulose, the operation steps are as follows:

[0022] 1. Same as step 1 of example 1.

[0023] 2. Preparation of dialdehyde nanocellulose: Take 30 mL of the nanocellulose suspension obtained after cleaning in step 1, oxidize it with sodium periodate, an oxidant, and the amount of sodium periodate is 5.3 times the mass of cellulose. The reaction was carried out for 2h.

[0024] 3. Take the dialdehyde nanocellulose suspension prepared in step 2 and wash it with dialysis method to obtain the dialdehyde nanocellulose. The aldehyde content of the dialdehyde nanocellulose is determined to be 7.76 mmol / g.

Embodiment 3

[0026] A preparation method of dialdehyde nanocellulose, the operation steps are as follows:

[0027] 1. Same as step 1 of example 1.

[0028] 2. Preparation of dialdehyde nanocellulose: Take 30 mL of the nanocellulose suspension obtained after cleaning in step 1, oxidize it with sodium periodate, an oxidant, and the amount of sodium periodate is 10 times the mass of cellulose. The reaction was carried out for 2h.

[0029] 3. The dialdehyde nanocellulose suspension prepared in step 2 was washed with dialysis method to obtain the dialdehyde nanocellulose, and the aldehyde content of the dialdehyde nanocellulose was determined to be 3.16 mmol / g.

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PUM

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Abstract

The invention discloses a preparing method for dialdehyde nano-crystalline cellulose. The preparing method comprises the steps that firstly, nano-crystalline cellulose is prepared; secondly, the dialdehyde nano-crystalline cellulose is prepared; thirdly, the dialdehyde nano-crystalline cellulose suspension liquid prepared in the second step is washed through a dialysis method, and the dialdehyde nano-crystalline cellulose is obtained. The preparing method has the following advantages that preparation is simple, the obtained dialdehyde nano-crystalline cellulose is high in aldehyde group content and is a multifunctional product which has wide application prospects in the biomedical field and chemical engineering field.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation. In particular, a preparation method of dialdehyde nanocellulose is provided. Background technique [0002] With the advancement of science and technology and the rapid development of modern industry, non-renewable resources such as coal, oil, and natural gas can no longer meet the needs of human productivity development. The consumption of a large number of non-renewable resources also brings serious environmental problems. In recent years, researchers at home and abroad have been seeking a kind of renewable resources with abundant reserves and green environmental protection. Cellulose is the most abundant polysaccharide natural and renewable organic polymer on the earth. It is mainly synthesized by the photosynthesis of plants. The annual cellulose output of the earth exceeds 15×10. 12 Ton. Cellulose is widely used in materials, papermaking, building materials, ships and coat...

Claims

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Application Information

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IPC IPC(8): C08B15/02
Inventor 高聪姚双全覃程荣袁月牛芬洁刘新亮
Owner GUANGXI UNIV
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