Ultra-fine microcrystalline cellulose and preparation thereof

A technology of microcrystalline cellulose and crystalline cellulose, which is applied in the field of ultra-fine crystalline cellulose and its preparation, and can solve problems such as inapplicability

Inactive Publication Date: 2009-07-15
PEKING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this treatment method can obtain MCC with a small particle size, which is beneficial to the subsequent graft copolymer

Method used

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  • Ultra-fine microcrystalline cellulose and preparation thereof
  • Ultra-fine microcrystalline cellulose and preparation thereof

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0028] The preparation of embodiment 1 ultrafine MCC

[0029] 40 kg of commercially available MCC with an average particle size of 50 μm was irradiated with Co-60 gamma rays at 50 kGy, and ultrafinely pulverized with a jet mill to obtain ultrafine MCC with an average particle size of 10 μm.

example example 2

[0030] The preparation of example example 2 ultrafine MCC

[0031] 1 kg of the ultrafine MCC with an average particle diameter of 10 μm was mixed with 5 kg of pure water, ground with a wet mill for 30 min, and then vacuum-dried to obtain an ultrafine MCC with an average particle diameter of 8 μm.

Embodiment 3

[0032] The preparation of embodiment 3 ultrafine MCC

[0033] The ultrafine MCC with an average particle diameter of 10 μm in Example 1 was mixed according to the following feed ratio: 400g MCC, 1440mL hydrochloric acid, 160mL sulfuric acid, 2400mL purified water. React at 95°C for 24h. The obtained product is neutralized and washed with sodium hydroxide, finally centrifuged and spray-dried to obtain superfine MCC with an average particle diameter of 5 μm.

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Abstract

The invention relates to superfine microcrystalline cellulose with particle size less than 10mum. The superfine microcrystalline cellulose with the particle size less than 10mum is obtained by degradation and superfine treatment of microcrystalline cellulose. The superfine microcrystalline cellulose can be widely applied to preparation of food additives, pharmaceutic adjuvants, emulsion stabilizers of cosmetics and thickening stabilizers of coating, and has high dispersibility and storage stability in water, better forming property, adhesiveness, water swellable property, thickening property, thixotropy and the like.

Description

technical field [0001] The invention relates to an ultrafine microcrystalline cellulose, in particular to an ultrafine microcrystalline cellulose with a particle diameter of less than 10 μm and a preparation method thereof. Background technique [0002] Microcrystalline cellulose (MCC) is a linear polysaccharide combined with β-1,4-glucoside. It is a granular powder product in which natural cellulose is hydrolyzed in an acidic medium to reduce the molecular weight to a certain range. Microcrystalline cellulose has functions such as viscosity adjustment, promotion of gelation, textile finishing, suspension stabilization, fat replacement, and anti-caking, so it is widely used in medicine, food, cosmetics and other industries. [0003] The crystallinity, molecular weight and degree of polymerization of MCC are not only related to the raw materials used in production, but also related to the processing method and processing depth of the product. The particle size of microcrysta...

Claims

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Application Information

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IPC IPC(8): C08B15/08A61K47/38C09D7/12A61K8/73A23L1/30A23L1/09A23L29/30
Inventor 许零王多祥黄凌翟茂林
Owner PEKING UNIV
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