Biopolymer-based systems are today encountered in a wide variety of possible applications, since they are usually low-cost materials and respond to the actual eco-sustainable requirements of renewability and biodegradability. On the other hand, these systems are sometimes related to low chemical and mechanical stability, and the research for new formulations with higher performances is continuously growing.
To this aim the investigation of the phase, structural and dynamic properties on a nanometric and subnanometric scale and of their correlations with the final macroscopic behaviour is of fundamental importance. In this field, Solid-State NMR (SSNMR)can givean important contribution
since it offers a large variety of tools for the investigation of both structural and dynamic properties, on large spatial (0.1-100 nm) and frequency ranges, of amorphous polymeric materials. In this work we studied hydrophobically-modified starch/sucrose spray dried amorphous blends by means of SSNMR techniques
