Low-molecular-weight C6-carboxyl chitin and preparation method thereof

The invention relates to low-molecular-weight C6-carboxyl chitin and a preparation method thereof. The preparation method comprises the following steps: (1) preparing a chitin raw material into a homogeneous solution by using a functional solvent, wherein the functional solvent contains one or more...

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Bibliographic Details
Main Authors WANG WEI, LIU JINGLING
Format Patent
LanguageChinese
English
Published 19.01.2018
Subjects
CHEMISTRY
COMPOSITIONS BASED THEREON
DERIVATIVES THEREOF
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
POLYSACCHARIDES
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Summary:The invention relates to low-molecular-weight C6-carboxyl chitin and a preparation method thereof. The preparation method comprises the following steps: (1) preparing a chitin raw material into a homogeneous solution by using a functional solvent, wherein the functional solvent contains one or more of phosphoric acid, sulfuric acid and hydrochloric acid; (2) directly adding an acid medium oxidizing agent and a catalyst into the solution obtained in the step (1), carrying out oxidation reaction, so that a hydroxyl at a site C6 is oxidized into a carboxyl, and further depolymerizing the chitin;and (3) regulating pH of the reaction liquid obtained in the step (2) to be 5-6, so that a raw product is obtained, or refining, so that a refined product is obtained. Therefore, molecular weight range of the prepared C6-carboxyl chitin is 500-800, and polymerization degree n is 2-35. The low-molecular-weight C6-carboxyl chitin has good hydrophilicity, moisture retention, biocompatibility, plant induced resistance activit
Bibliography:Application Number: CN201711018154