Integrated manufacturing of REciclable multi-material COmposites for the TRANSport sector
Regulation of hydrogen bonding network between cellulose nanofibers by rare earth ion Y3+
Cellulose is regarded as the most abundant biomass, and nanocellulose derived from it has numerous applications in environmentally friendly materials. However, owing to the abundant hydroxyl groups on surface, nanocellulose is prone to agglomeration when transported, stored, or made into materials, which destroys material performance and limits its use. In this study, a feasible method was presented for regulating the hydrogen bonding strength between cellulose nanofibers (CNFs) by adding a minute quantity of rare earth ions Y3+ during cellulose nanofibrillation. It was found that the strength of hydrogen bonding between CNFs can be regulated by controlling the quantity of Y3+ in the system. The dispersibility and stability of CNFs, as well as the mechanical properties of CNFs films and CNFs-reinforced papers can be improved by 43.07 % and by 64.05 % after adding only 0.05 or 0.075 wt% Y3+. The possible mechanism of CNFs hydrogen bonding network reconstruction was proposed.
» Author: Shuo Lou, Yong Huang, Min Wu
This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement Nº 768737
