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The method for extracting tannin extract from Camellia oleifera shell and its application in the preparation of composite materials

A technology of camellia oleifera husk and tannin extract, which is applied in chemical instruments and methods, natural resin refining, natural resin technology, etc., can solve the problems of less application research on downstream products, low tannin content of tannin extract, and low production efficiency, and achieve The effect of high tannin content of extract, good social benefits and high production efficiency

Active Publication Date: 2020-12-25
GUANGXI FORESTRY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has defects such as relatively complicated process, high cost, and low production efficiency, and the produced extract has low tannin content and darker color.
At present, the research mainly focuses on the extraction and purification of effective components in the shell of Camellia oleifera, but there are few studies on its downstream product application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for extracting tannin extract from camellia oleifera husks, comprising the steps of:

[0031] (1) After the camellia oleifera husk is dried in the sun, sort and remove impurities, break into 0.1mm particles, and set aside;

[0032] (2) Put the crushed camellia oleifera shells into the extraction tank, add water, sodium bisulfite and ethanol respectively, wherein the ratio of solid to liquid is 1:2, and the amount of sodium bisulfite added is 0.3% of the water, The amount of ethanol added is 5% of the water, heated to 60°C, leached for 1 hour, collected the extract and camellia oleifera husk, repeatedly leached the camellia oleifera husk for 3 times, and combined the extracts;

[0033] (3) Cool the above extract to 5°C, let it stand for 20 hours, filter, and remove the precipitate;

[0034] (4) Take the above impurity-removed extract, add calcium hydroxide complexing agent and stir to make the solution pH to 7.0, filter, take the filter cake, and wash the filte...

Embodiment 2

[0039] A method for extracting tannin extract from camellia oleifera husks, comprising the steps of:

[0040] (1) After the camellia oleifera husk is dried in the sun, sort and remove impurities, break into 1.0mm particles, and set aside;

[0041] (2) Put the crushed camellia oleifera shells into the extraction tank, add water, sodium bisulfite and ethanol respectively, wherein the ratio of solid to liquid is 1:2.5, and the amount of sodium bisulfite added is 0.1% of the water, The amount of ethanol added is 3% of the water, heated to 80°C, leached for 10 hours, collected the extract and camellia oleifera husk, repeatedly leached the camellia oleifera husk for 2 times, and combined the extracts;

[0042] (3) Cool the above extract to 2°C, let it stand for 24 hours, filter, and remove the precipitate;

[0043] (4) Take the above impurity-removed extract, add magnesium hydroxide complexing agent and stir to make the solution pH to 7.5, filter, take the filter cake, and wash the...

Embodiment 3

[0048] A method for extracting tannin extract from camellia oleifera husks, comprising the steps of:

[0049] (1) After the camellia oleifera husk is dried in the sun, sort and remove impurities, break into 0.5mm particles, and set aside;

[0050] (2) Put the crushed camellia oleifera shells into the extraction tank, add water, sodium bisulfite and ethanol respectively, wherein the ratio of solid to liquid is 1:3, and the amount of sodium bisulfite added is 0.5% of the water, The amount of ethanol added is 2% of the water, heated to 50°C, leached for 5 hours, collected the extract and camellia oleifera husk, repeatedly leached the camellia oleifera husk for 2 times, and combined the extracts;

[0051](3) Cool the above extract to 4°C, let it stand for 18 hours, filter, and remove the precipitate;

[0052] (4) Take the above impurity-removed extract, add calcium hydroxide complexing agent and stir to make the pH of the solution reach 7.5, filter, take the filter cake, and wash...

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Abstract

The invention discloses a method for extracting a tannin extract by using a camellia oleifera shell, and application of the camellia oleifera shell to preparation of a composite material. The method comprises the following steps: crushing the camellia oleifera shell, adding water, an antioxidant and an ethanol exaction promoter, performing extraction and combining the extraction liquid; allowing standing still, settling and removing impurities, adding calcium and magnesium ions into supernatant liquid and performing complex-precipitation; taking complex precipitate, adding dilute sulfuric acid and performing replacement to obtain a tannin extract solution; concentrating and spray-drying the tannin extract solution to obtain the tannin extract with high tannin content; grinding the extracted camellia oleifera shell, and preparing a lightweight composite material by using the ground camellia oleifera shell, bisphenol A epoxy resin and a fatty amine curing agent. The method provided by the invention has the advantages of simple process, low cost, high tannin content of the extracted tannin extract, light color, safety, environmental friendliness and the like; the residual camellia oleifera shell after extraction of the tannin extract can be used for preparing the lightweight composite material. The camellia oleifera shell can be completely and comprehensively utilized, waste is changed into treasures, and good social, ecological and economic benefits are achieved.

Description

technical field [0001] The invention relates to the technical field of extraction of effective plant components, in particular to a method for extracting tannin extract from camellia oleifera husk and its application in preparing composite materials. Background technique [0002] Camellia oleifera (Camellia oleifera Abel.), also known as tea tree, mainly refers to the general term for a class of plants with high oil content and economic value in cultivation in Camellia plants. It is a unique woody edible oil tree species in southern China. Oil palm and coconut are known as the world's four largest woody oil tree species. my country is the country with the highest output of camellia oleifera, the widest distribution of camellia oleifera and the most varieties of camellia oleifera in the world. The current area of ​​camellia oleifera in the country is about 4 million hm 2 , with an annual output of 600 million kilograms of tea seeds. Camellia oleifera shell is the peel of ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09F1/00C09F1/02C08L63/00C08L97/00C08L5/00
CPCC08L63/00C08L2203/14C08L2205/03C09F1/00C09F1/02C08L97/005C08L5/00
Inventor 周丽珠孟中磊谷瑶陈海燕李军集秦荣秀
Owner GUANGXI FORESTRY RES INST
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