Main content area

Novel Biodegradable Films with Extraordinary Tensile Strength and Flexibility Provided by Nanoparticles

Kaur, Harpreet, Banipal, Tarlok Singh, Thakur, Sourbh, Bakshi, Mandeep Singh, Kaur, Gurinder, Singh, Narpinder
ACS sustainable chemistry 2013 v.1 no.1 pp. 127-136
X-ray diffraction, atomic force microscopy, biodegradability, cadmium, differential scanning calorimetry, fluorescence, glycerol, gold, industrial applications, nanogold, nanoparticles, reducing agents, starch, sulfides, surface plasmon resonance, tensile strength, transmission electron microscopy
A simple method has been proposed to synthesize environmental friendly biodegradable starch films containing gold (Au) and cadmium sulfide (CdS) nanoparticles (NPs) with significantly improved mechanical properties than pure starch films for various industrial applications. Au NPs were synthesized in vitro by using starch as a weak reducing agent simultaneously for the starch film formation. All reactions were monitored with UV–visible measurements, and it was observed that the growth of Au NPs was proportional to the amount of starch. Due to the inherent surface plasmon resonance (SPR), all Au NP starch films were UV active. Likewise, CdS NPs were synthesized in the glycerol medium and further incorporated in the starch films to make fluorescent active films. X-ray diffraction (XRD), transmission electron microscopy (TEM), atomic force microscopy (AFM), and differential scanning calorimetry (DSC) measurements were used to characterize NPs as well as starch films. A systematic measurement of mechanical properties showed a high degree of tensile strength and flexibility for CdS fluorescent starch films in comparison to Au NP starch films that made the former an ideal candidate for various industrial applications.