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Method for extracting filament gutta-percha from eucommia leaf and skin

A technology of Eucommia leaf and Eucommia gum, which is applied in the field of extracting Eucommia ulmoides, can solve the problems of destroying the structure of Eucommia collagen, reducing the stretchability, toughness, elasticity and crystallization of Eucommia gum, and achieving the effect of high yield.

Inactive Publication Date: 2008-04-09
GUIZHOU UNIV
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  • Abstract
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for extracting long silk eucommia gum from Eucommia leaves and bark, to overcome the structure of Eucommia ulmoides collagen that is destroyed by mechanical crushing during raw material pretreatment in the prior art, and greatly reduce the cost of eucommia gum Defects in valuable properties such as stretchability, toughness, elasticity, and crystallization of silk

Method used

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  • Method for extracting filament gutta-percha from eucommia leaf and skin

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Embodiment Construction

[0012] The following examples are used to further illustrate the present invention:

[0013] Step 1: Remove the cuticle

[0014] Slightly crush the Eucommia leaves or bark of Eucommia, and process them into about 1-3cm 2 Place the piece in a 250ml conical beaker, add 200ml of NaOH solution with a mass fraction of 1%, shake it on a shaker at 30°C to 70°C and 120r / min for 6h; filter, and wash the obtained filter residue with 2000ml of distilled water to pH The value is 7.0, and then dried in an oven at 50°C to constant weight;

[0015] Step 2: Enzymatic hydrolysis of cell wall fibers

[0016] Add 50mL of cellulase solution purchased from Zhangjiagang Jinyuan Biochemical Co., Ltd. with a pH of 4 to the leaves of the filter residue obtained in the previous step, and 100ml of the corresponding buffer solution with pH=4, shake well; place at 50°C In a water-bath shaker, shake for 2 hours at a rotational speed of 120r / min; similarly filter, dry the leaf filter residue in an oven a...

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Abstract

The invention discloses an extraction method of filament eucommia rubber from eucommia leaves and peel; the method uses petrol ether as solvent to extract the eucommia rubber and has the steps: first, the eucommia leaves or the peel is made into small pieces and added with NaOH solution to dissolve cuticle; then cellulase is added to hydrolyze cell wall; the petroleum ether solvent at 60 DEG C to 90 DEG C of boiling range is added; then the obtained solution is extracted through recirculation at the temperature of 85 DEG C and filtrated when being hot, then cooled and frozen; the filament eucommia rubber is produced after filtration. Concentration of the NaOH solution is 0.5 percent to 1.5 percent and the dissolution time is 6 hours; pH value of the cellulase used for hydrolyzing the cell wall is 4 at temperature of 50 DEG C; enzymatic hydrolysis time is 1 hour to 2 hours and the time for reflux extraction is 2 hours; the frozen time is 30 minutes to 60 minutes at temperature of minus 20 DEG C to 0 DEG C. The method can effectively and completely extract the eucommia rubber to make original eucommia rubber and keep the original biological characteristics and physical properties and status and the original molecular structure and polymerization of the eucommia rubber; the method uses the cellulose to extract pretreated eucommia leaves raw materials, and gets the eucommia rubber of high quality when getting high yield.

Description

technical field [0001] The invention relates to a method for extracting natural polymer materials, in particular to a method for extracting filament eucommia gum from natural plant eucommia leaves and bark by using a solvent. Background technique [0002] Eucommia ulmoides gum, commonly known internationally as gutta-percha or balata, is a natural biopolymer material contained in Eucommia ulmoides gum. Eucommia gum has unique trans-polyisoprene (C 5 h 8 ) n Molecular structure, exhibiting many unique properties and functions, is a special functional biomaterial. Because the polymerization of Eucommia gum is carried out under the action of biological enzymes, the polymer does not contain any small molecule catalysts or monomer substances, showing extremely high electrical insulation. The special physical and chemical properties of the polymer are mainly derived from its molecular structure. In addition, through the observation of the residue of Eucommia gum extracted by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09F1/00C12P1/00
Inventor 张学俊韩三法王庆辉成川
Owner GUIZHOU UNIV
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