Bacterial nanocellulose (BC)-based composites containing poly(2-hydroxyethyl methacrylate) (PHEMA), poly(methacroylcholine chloride) (PMACC) or poly(methacroylcholine hydroxide) (PMACH) were characterized by inelastic neutron scattering (INS) spectroscopy, combined with DFT (density functional theory) calculations of model systems. A reasonable match between calculated and experimental spectral lines and their intensities was used to support the vibrational assignment of the observed bands and to validate the possible structures. The differences between the spectra of the nanocomposites and the pure precursors indicate that interactions between the components are stronger for the ionic poly(methacrylate) derivatives than for the neutral counterpart. Displaced anions interact differently with cellulose chains, due to the different ability to compete with the O-H···O hydrogen bonds in cellulose. Hence, the INS is an adequate technique to delve deeper into the structure and dynamics of nanocellulose-based composites, confirming that they are true nanocomposite materials instead of simple mixtures of totally independent domains.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7180936PMC
http://dx.doi.org/10.3390/molecules25071689DOI Listing

Publication Analysis

Top Keywords

structure dynamics
8
dynamics nanocellulose-based
8
nanocellulose-based composites
8
ionic polymethacrylate
8
polymethacrylate derivatives
8
inelastic neutron
8
neutron scattering
8
understanding structure
4
composites neutral
4
neutral ionic
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!