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Method for extracting bamboo polysaccharides

An extraction method, bamboo technology, applied in the field of separation and preparation of plant active components, to achieve the effect of improving yield and product purity, improving purity, and broad application prospects

Active Publication Date: 2014-09-03
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are no public reports on the application of steam explosion technology to the pretreatment of plant raw materials with the goal of obtaining high polysaccharide yields.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Embodiment 1, a kind of extraction method of bamboo polysaccharide, carries out following steps successively:

[0054] 1) Take 2000 g of moso bamboo shavings (moisture content 10 %) and carry out steam explosion treatment in a steam explosion machine. The steam explosion pressure is 2.2 MPa, the pressure holding time is 60 s, and the explosion time is 0.005075 s≤T≤0.008752 s; Bamboo material after steam explosion treatment.

[0055] 2) Take 672 g of bamboo material after steam explosion treatment (moisture content is about 33%), add 3.6 L of pure water for extraction (that is, the ratio of solid to liquid is 1g on a dry basis: 8 mL of water), and heat reflux at 100 °C Extract for 2 h, filter, and the obtained filtrate is bamboo water extract.

[0056] 3) The water extract of bamboo was filtered with a microporous membrane (pore size 0.3 μm, made of PVDF), and then subjected to ultrafiltration (using a PES membrane with a molecular weight cut-off of 10,000 Da). The work...

Embodiment 2

[0064] Embodiment 2, a kind of extraction method of bamboo polysaccharide, carry out following steps successively:

[0065] 1) Take a bamboo stalk (about 15 kg in weight, about 15% in water content) and put it into a steam explosion machine with a length of 8-10 cm and a width of 1.5-2 cm. The pressing time was 30 s, and the bursting time was 0.005075 s≤T≤0.008752 s; the bamboo material after steam explosion treatment was obtained.

[0066] 2) Take 646 g of bamboo material after steam explosion treatment (moisture content about 35%) and add 2.1 L of pure water for extraction (that is, the ratio of solid to liquid is 1g on a dry basis: 5 mL of water), and heat reflux extraction at 100 °C After 1.5 h, filter to obtain the filtrate; the obtained filtrate is the water extract of bamboo.

[0067] 3) After filtering the bamboo water extract with a microporous membrane (pore size 0.3 μm, made of PVDF), ultrafiltration (using a TFM membrane with a molecular weight cut-off of 3500 Da)...

Embodiment 3

[0076] Embodiment 3, a kind of extraction method of bamboo polysaccharide, carries out following steps successively:

[0077] 1) Take 1 kg of golden moso bamboo shavings (moisture content about 10%) for steam explosion treatment, the steam explosion pressure is 2.8 MPa, the pressure holding time is 220 s, and the explosion time is 0.005075 s≤T≤0.008752 s; after steam explosion treatment Bamboo material.

[0078] 2) Take 625 g of material after steam explosion treatment (moisture content is about 28%), add 5.4 L of pure water for extraction (that is, the ratio of solid to liquid is 1g on a dry basis: 12 mL of water), and heat reflux extraction at 100 °C After 2.5 h, filter to obtain the filtrate; the obtained filtrate is the water extract of bamboo.

[0079] 3) Concentrate the water extract of bamboo in vacuum (vacuum degree ≤ 0.09 Mpa, temperature 45~50°C), and when concentrated to a volume of about 500 mL, add edible alcohol (purity ≥ 95% ) for precipitation, put it in the ...

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Abstract

The invention relates to methods for efficiently extracting and separating bamboo polysaccharides, belonging to the technical field of plant effective ingredient separated preparation. The invention discloses a method for extracting bamboo polysaccharides. The method comprises the following sequential steps: (1) pretreating bamboos, which serve as raw materials, by adopting a steam explosion method, so as to obtain a bamboo material subjected to steam explosion treatment; (2) carrying out water extraction on the bamboo material subjected to steam explosion treatment, so as to obtain a bamboo water extract; (3) carrying out concentrating refinement on the bamboo water extract by adopting any way as follows: a way I, namely carrying out vacuum concentration on the bamboo water extract, and then, carrying out alcohol precipitation treatment, thereby obtaining a bamboo polysaccharide product; a way II, namely carrying out concentrating refinement on the bamboo water extract by directly adopting a membrane separation method, thereby obtaining the bamboo polysaccharide product. According to the steam explosion method in the step (1), the bamboos are subjected to instantaneous explosion after the bamboos are subjected to pressure maintaining for 30-240 seconds under the pressure of 1.4-3.0MPa, and the explosion time T is not shorter than 0.005075 second and not longer than 0.008752 second.

Description

technical field [0001] The invention relates to a method for efficiently extracting and isolating bamboo polysaccharides, and belongs to the technical field of separation and preparation of plant effective components. Background technique [0002] my country is the central production area of ​​bamboo in the world and is known as the "Kingdom of Bamboo". There are more than 600 bamboo species in 48 genera, and the national bamboo forest area has reached 7.2 million hectares. Among them, Phyllostachys pubescens has the widest distribution range, the largest area, and the highest economic value. my country is the country with the most advanced bamboo research and development and manufacturing technology in the world. In the process of bamboo processing, a large amount of bamboo shavings and bamboo sawdust will be produced in the process of scraping green, cutting, grinding, polishing, etc., which have been mainly used as fuel for a long time. Use, a small amount as a filler for...

Claims

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Application Information

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IPC IPC(8): C08B37/00
Inventor 张英黄骆镰龚凌霄吴聪俊高汪磊
Owner ZHEJIANG UNIV
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