Preparation of self-assembled modified reed fiber reinforced starch-based adhesive and the study of cross-linking mechanism

In this study, glycol diglycidyl ether was used as a crosslinker to facilitate the formation of a cross-linked network structure between starch and gelatin, and the incorporation of self-assembled modified reed fibers resulted in the synthesis of an environmentally friendly starch-based adhesive. The results of Fourier transform infrared spectroscopy, scanning electron microscope, X-ray diffractometer, rheological properties and thermogravimetric analysis showed that starch and gelatin formed a dense macromolecular network structure under the action of crosslinker. The shear strength, water resistance, rheology and thermal stability of the starch-based adhesive were improved, with dry and wet strengths of 6.46 MPa and 1.32 MPa, respectively. The computer simulation analysis showed that starch and gelatin had better compatibility. Compared with unmodified starch, the crosslinked adhesive had less hydrogen bond, lower water absorption and more dense network structure, which provided a reference for the future study of the modification of starch-based adhesive and the mechanism of molecular interaction.