Synthesis of Cationic Starch Compound Emulsion by Graft Copolymerization with Tea Polyphenols and AEM5700

Abstract

An antibacterial biobased compound emulsion was prepared by modifying cationic oxidized starch grafted styrene‐acrylic emulsion with 3 – (trimethoxysilyl) – propyldimethyloctadecyl ammonium chloride (AEM5700) and tea polyphenols. The biobased compound emulsion exhibited better stability, chemical properties and antibacterial properties. The structure and surface morphology of biobased compound emulsion were characterized by Fourier Transform infrared spectroscopy (FTIR) and Transmission electron microscopy (TEM). The thermal stability of biobased compound emulsion was improved, which can be concluded from the thermogravimetric analysis (TGA). The surface morphology of film was observed by the atomic force microscope (AFM). The wetting property of emulsion film was tested by contact angle test. When the compound ratio was 1.5, the biobased antibacterial compound emulsion had better stability and antibacterial properties. Compared to a single antibacterial agent, the inhibition zone increased by 4–5.5 mm. In addition, the polymerization mechanism of the biobased antibacterial emulsion was analyzed.This article is protected by copyright. All rights reserved