**Acknowledgements**

This work was supported by the Ministry of Education and Research in Romania, under the following grants: Program 1, The improvement of the National System of Research and Development and Subprogram 1.2—Institutional Excellence—Projects of Excellence Funding in RDI, Contract nr. 7PFE/16.10.2018; PN 19.29.02.01; by UEFISCDI, grant, Project PN-III-P1-1.2-PCCDI-2017-0782 (REGMED); and by COST 18125 AeroGels.
