High-grafting active lignin as well as preparation method and application thereof

The invention relates to highly grafted active lignin as well as a preparation method and application thereof. The preparation method comprises the following steps: dissolving lignin in a sodium hydroxide/urea/water mixed solution at a certain temperature to obtain a lignin mixed solution; dilute hy...

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Bibliographische Detailangaben
Hauptverfasser:	ZOU FENG, ZHONG YI, MAO ZHIPING, XU YOUQI, WANG YAMEI, WANG BIJIA, FENG XUELING, YU HAINAN, JI BOLIN, WU WEI, XU HONG, RUAN YULONG, WU SHOUYING
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ADHESIVES AGRICULTURE ANIMAL HUSBANDRY BEER BIOCHEMISTRY BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES, AS HERBICIDES CHEMICAL RIPENING OF FRUIT OR VEGETABLES CHEMISTRY COMPOSITIONS BASED THEREON DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS DYES ENZYMOLOGY FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIREDCHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERSFROM A RACEMIC MIXTURE FISHING FOODS OR FOODSTUFFS FORESTRY HUMAN NECESSITIES HUNTING MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MICROBIOLOGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS MUTATION OR GENETIC ENGINEERING NATURAL RESINS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PEST REPELLANTS OR ATTRACTANTS PLANT GROWTH REGULATORS POLISHES PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTSTHEREOF PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT,VEGETABLES, EDIBLE SEEDS SPIRITS THE PRESERVED, RIPENED, OR CANNED PRODUCTS THEIR PREPARATION OR CHEMICAL WORKING-UP THEIR TREATMENT, NOT COVERED BY OTHER CLASSES TRAPPING VINEGAR WINE
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Beschreibung
Zusammenfassung:	The invention relates to highly grafted active lignin as well as a preparation method and application thereof. The preparation method comprises the following steps: dissolving lignin in a sodium hydroxide/urea/water mixed solution at a certain temperature to obtain a lignin mixed solution; dilute hydrochloric acid is dropwise added into the lignin mixed solution, lignin particles are separated out, and the lignin particles are washed with water for multiple times; putting the washed and dehydrated lignin particles into a buffer solution, adding laccase, and stirring for a period of time at a certain temperature; and finally, washing the product with water for multiple times, and drying to obtain the high-grafting active lignin. The phenolic hydroxyl group content of the prepared high-grafting active lignin is increased by 30-60% compared with that before the reaction; and the DPPH free radical scavenging rate and the PTIO free radical scavenging rate of the highly grafted active lignin are respectively 70-95%