Disordering of Starch Films as a Factor Influencing the Release Rate of Biologically Active Substances.

ABSTRACT: The release of a spin probe (nitroxide radical) from polymer films was studied by electron paramagnetic resonance (EPR). The films were fabricated from starch having different crystal structures (A-, B-, and C-types) and disordering degrees. Film morphology (analysis of the scanning electron microscopy (SEM)) depended on the presence of dopant (nitroxide radical) to a larger extent rather than on crystal structure ordering or polymorphic modification. The presence of nitroxide radical led to additional crystal structure disordering and reduced the crystallinity index from the X-ray diffraction (XRD) data. Polymeric films made of amorphized starch powder were able to undergo recrystallization (crystal structure rearrangement), which manifested itself as an increase in crystallinity index an

SUBMITTER: Podgorbunskikh E 

PROVIDER: S-EPMC10222158 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature