Effects of silane modification on the properties of bamboo powder/zein composite films

To achieve high-value utilization of corn protein waste, composite films were prepared from bamboo powder and zein, and the effects of silane modification on the properties of bamboo powder/zein composite films were studied. The results showed that the appropriate concentrations of the silane coupling agent reduced the polarity of the bamboo powder, improved the compatibility between the bamboo powder and zein, delayed the thermal decomposition rate of zein, enhanced the thermal stability of zein, and improved the tensile strength and elongation at break of the bamboo powder/zein composite films. Among all the composite film samples, the zein composite films prepared by combined treatment with a silane coupling agent and silica exhibited the best comprehensive mechanical properties, with a tensile strength of 0.23 MPa, tensile modulus of 4.67 MPa, and elongation at break of 408.07%. These results can provide technical support for the improvement of the properties of biomass/zein composites.