Preparation and characterization of potato starch/bentonite organophylized by SDS

This study focuses on the development of nanocomposite films using potato starch via a casting technique. Glycerol was incorporated as a plasticizer, while Sodium Dodecyl Sulfate (SDS)-modified bentonite acted as reinforcement. Various analytical methods, including Fourier transform infrared (FTIR), X-ray diffraction (XRD), Thermogravimetric analysis (TGA), UV/vis spectroscopy, Electron microscopy (SEM), and Optical microscopy (MOP), were utilized to assess the material properties. Different concentrations of SDS, below, at, and above the critical micelle concentration (CMC), were investigated. The findings suggest that films containing higher SDS levels demonstrate enhancements in both physical and chemical characteristics. XRD assessments reveal that films with SDS concentrations surpassing the CMC level display homogeneity, indicating effective intercalation or exfoliation processes. This compatibility of the biofilm components is further evidenced through FTIR, SEM, and MOP. Moreover, the introduction of SDS significantly improves the film’s biodegradability, as confirmed by thermogravimetric analysis.