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Method for preparing nanocellulose by taking folium artemisiae argyi residues after essential oil extraction as raw material

A nanocellulose and cellulose technology, which is applied in the post-processing of cellulose pulp, cellulose treatment with microorganisms/enzymes, and fiber raw material treatment, etc., can solve the problems of shortening the duration of heat release, burning rate, and low heat release.

Active Publication Date: 2021-04-23
INST OF CHINESE MATERIA MEDICA CHINA ACAD OF CHINESE MEDICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can quickly reduce the volatile oil content in the raw Artemisia argyi leaves and shorten the preparation time of old Artemisia argyi, but in the process of extracting the volatile oil, components such as hemicellulose, cellulose, and lignin in the Artemisia argyi leaves undergo degradation reactions, and thus obtained The burning rate and heat release of moxa and moxa sticks are lower than those of unextracted original moxa, which shortens the average heat release time and heat release duration

Method used

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  • Method for preparing nanocellulose by taking folium artemisiae argyi residues after essential oil extraction as raw material
  • Method for preparing nanocellulose by taking folium artemisiae argyi residues after essential oil extraction as raw material

Examples

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Effect test

Embodiment 1

[0074] (1) Take 50 g of Artemisia argyi leaves residue (solid content is 10wt%) after extracting essential oil from a certain factory, add papain, and the amount of papain added is 500 U per kilogram of Artemisia argyi leaf residue; Enzymolysis at a stirring speed of 30 rpm and 35°C 90 minutes; filter, and dry the solid in an oven at 105°C for 30 minutes;

[0075] (2) Put the dried solid into a Soxhlet extractor equipped with a benzene-ethanol mixture (2:1 in volume ratio), heat and extract in a water bath for 6 hours, and the temperature of the water bath is 80±5°C to ensure that the solvent circulates for 4 hours per hour. times; filter, the extracted residue is naturally air-dried at room temperature to obtain a dry material;

[0076] (3) Put the dry material in a sodium hydroxide solution with a mass concentration of 10%, with a solid-to-liquid ratio of 1:5g / mL; ultrasonically remove hemicellulose at 50°C for 2.5h; filter, and dry at 105°C until the water content is less t...

Embodiment 2

[0081] (1) Get 30g (water content is 90wt%) of Folium Artemisiae Argyi residue after laboratory water steam distillation extracts essential oil, add papain, the addition of papain is 800U per kilogram of Folium Artemisiae Argyi residue; Enzymolysis under high temperature for 60 minutes; filter, and dry the solid in an oven at 105°C for 40 minutes;

[0082] (2) Put the dried solid into a Soxhlet extractor equipped with ether, heat and extract in a water bath for 5 hours, the temperature of the water bath is 85±5°C, and ensure that the solvent is circulated 6 times per hour; Air-dried to obtain dry material;

[0083] (3) Put the dry material in a sodium hydroxide solution with a mass concentration of 10%, and the solid-to-liquid ratio is 1:5g / mL; ultrasonically remove hemicellulose at 40°C for 3h; filter, and dry at 105°C until the water content is less than 10wt %, to obtain crude cellulose;

[0084] (4) then carry out peracetic acid bleaching to the cellulose crude product t...

Embodiment 3

[0088] (1) Get 50 g of Artemisia argyi leaves residue (solid content is 8.3wt%) after extracting essential oil by steam distillation, add papain, and the addition of papain is 500 U per kilogram of Artemisia argyi leaf residue; At stirring speed, it is 30 rev / min, 55 DEG C Enzymolysis for 40 minutes; filter, and dry the solid;

[0089] (2) Put the dried solid into a Soxhlet extractor filled with a toluene-ethanol mixture (volume ratio 2:1), heat and extract in a water bath for 6 hours, and the temperature of the water bath is 90±5°C to ensure solvent circulation per hour 6 times; filter, and air-dry the residue after extraction at room temperature to obtain a dry material;

[0090] (3) Put the dry material in a sodium hydroxide solution with a mass concentration of 10%, and the solid-to-liquid ratio is 1:5g / mL; ultrasonically at 60°C for 2 hours to remove hemicellulose; filter, and dry at 105°C until the moisture is less than 10wt %, to obtain crude cellulose;

[0091] (4) T...

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Abstract

The invention discloses a method for preparing nanocellulose by taking folium artemisiae argyi residues after essential oil extraction as a raw material, which belongs to the field of folium artemisiae argyi application. The preparation method of the nanocellulose comprises the following steps of firstly, carrying out enzymolysis treatment on folium artemisiae argyi residues by using protease, and then sequentially carrying out organic solvent extraction, alkali liquor treatment and hydrogen peroxide and / or peracetic acid bleaching treatment on the obtained residues, and finally, carrying out acid hydrolysis and high-pressure homogenization treatment to obtain the nanocellulose. The nanocellulose prepared by the method is small in particle size and relatively high in yield; meanwhile, the preparation process is simple, the cost is low, the raw materials of the nanocellulose are enriched, the waste folium artemisiae argyi residues are recycled, and the comprehensive utilization potential of folium artemisiae argyi is increased.

Description

technical field [0001] The invention relates to the field of application of mugwort leaves, in particular to a method for preparing nanocellulose by using mugwort leaf residue after extracting essential oils as a raw material. Background technique [0002] Artemisia argyi Levl.et Vant. is the dry leaf of Artemisia argyi Levl.et Vant., a plant in the Compositae family. It is widely distributed in Hubei, Henan, Hunan, Anhui, Shandong, Hebei and other provinces. It is a commonly used traditional Chinese medicine. Artemisia argyi leaves are pungent, bitter and warm, and can be taken internally or externally. It has the functions of warming the meridians to stop bleeding, dispelling cold and relieving pain, regulating menstruation and preventing miscarriage; after pounding the velvet, it can be used for moxibustion for all kinds of diseases. It has the effects of promoting qi, nourishing qi and supporting yang, harmonizing yin and yang, strengthening the body and eliminating path...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C3/02D21C5/00D21C9/00D21C9/02D21C9/10D21C9/16
CPCD21C5/005D21C3/02D21C9/02D21C9/10D21C9/163D21C9/00
Inventor 张元康利平黄璐琦黄显章刘大会郭兰萍
Owner INST OF CHINESE MATERIA MEDICA CHINA ACAD OF CHINESE MEDICAL SCI
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