Preparation method of glutinous rice flour grafted polycaprolactone thermoplastic material

The invention relates to a preparation method of a glutinous rice flour grafted polycaprolactone thermoplastic material, which comprises the following steps: expanding glutinous rice into a glutinous rice rod, grinding, drying, and dewatering; dissolving the dry expanded glutinous rice flour in pyridine, pouring the solution into a four-neck flask, placing the four-neck flask in an oil bath, and adding an epsilon-caprolactone monomer; introducing nitrogen gas to the four-neck flask, degassing, and dewatering; preparing stannous octoate and pyridine into a pyridine solution, adding the pyridine solution into the four-neck flask under the protection of the nitrogen, stirring to perform a reaction, stopping heating, continuing to introduce nitrogen gas while stirring, and stopping the reaction when the reactant temperature is cooled to below 60 DEG C; and depositing the reaction product, filtering, extracting the obtained product with methyl benzene to obtain milk white flour, and carrying out vacuum drying to obtain the required expanded glutinous rice flour grafted polycaprolactone thermoplastic material. The method in the invention saves the cost by directly replacing glutinous rice starch with glutinous rice flour, and provides a preparation method for preparing a novel thermoplastic starch material in order to overcome the defects of the prior art.