Method for preparing sheet-like microcrystal cellulose and modification processing method

A technology of microcrystalline cellulose and a treatment method, which is applied in the field of preparation and surface modification treatment of flaky microcrystalline cellulose, can solve the problems that it is not suitable for large-scale production and has high requirements in the production process, and achieves improved dispersibility, The effect of maintaining physical and mechanical properties and maintaining excellent properties

Inactive Publication Date: 2007-11-14
LUDONG UNIVERSITY +1
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

However, in the process of preparation or modification, nano-scale products are directly used for modification, or the treatment takes a long time to obtain nano-scale microcrystalline cellulose. These methods have high requirements on the production process and are not suitable for large-scale production.

Method used

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  • Method for preparing sheet-like microcrystal cellulose and modification processing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Prepare 200 ml of sulfuric acid solution with a volume ratio of 1:1, add 20.5 g of lignocellulose, stir rapidly at 60°C for 5 minutes, then add 0.8 ml of acetic anhydride, adjust the temperature to 40°C, stir for 60 minutes, wash, filter, and dry Dry and grind to obtain surface-modified flaky microcrystalline cellulose.

[0026] The scanning electron microscope observation results of microcrystalline cellulose obtained after acid treatment in the examples are shown in FIG. 1 . The scanning electron microscope observation results of the microcrystalline cellulose modified by adding acetic anhydride are shown in Fig. 2 . It can be clearly seen from the morphology that the microcrystalline cellulose is in the form of flakes.

Embodiment 2

[0028] Prepare 100 milliliters of sulfuric acid solution with a volume ratio of 1:1.5, add 15.0 grams of lignocellulose, stir rapidly at 40°C for 15 minutes, then add 0.2021 grams of sodium dodecylbenzenesulfonate, stir rapidly for 30 minutes, filter, wash, put Dry in a drying oven and grind.

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PUM

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Abstract

This invention relates to preparation method of a flakiness microcrystalline cellulose, as well as its surface reshaping method. The process: in water disperse medium, take reaction with sulfuric acid to gain flakiness microcrystalline cellulose, then surface by acetic acid esterification or SAA absorption modifing, repass wash, filter , dryness, gain the product. The mass ratio of water and cellulose is 3 to 25:1, sulfuric acid volumetric concentration for 30 to 80%, temperature for 10 - to 85 deg, time for 5 to 120 minutes. The mass ratio of acetic ester modifier or SAA and microcrystalline cellulose is 0.1 to 5: 100. The modifier not only keep the favorable physics and mechanical property of cellulose, but also improve dispersibility, greatly advance consistency with high molecular material, broaden the application area.

Description

technical field [0001] The invention relates to a preparation method of flaky microcrystalline cellulose and a surface modification treatment method. The modified flaky microcrystalline cellulose can be dispersed in a non-aqueous solvent and belongs to the chemical industry category. Background technique [0002] With the development of society, human beings are facing the dilemma of excessive consumption of resources and intensified environmental pollution. Actively looking for renewable resources, adopting green chemical processes, and reducing environmental pollution are inevitable choices for the sustainable development of human society. Cellulose is an abundant biomass renewable resource in nature. It is a by-product of industrial papermaking, cotton textile and other industries. At present, the recycling rate is not high, and most of it is discharged with wastewater, which not only pollutes the environment, but also wastes resources. Today, when the world's oil, coal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B15/02
Inventor 高善民黄百勇邓金慧王玉宝胡玉才徐彦宾
Owner LUDONG UNIVERSITY
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