Tuning the structural and functional properties of HAVOH-based composites via ionic liquid tailoring of MWCNTs distribution

0540932 - ÚMCH 2022 RIV GB eng J - Journal Article
Santillo, C. - Godoy, A. P. - Donato, Ricardo Keitel - Andrade, R. J. E. - Buonocore, G. G. - Xia, H. - Lavorgna, M. - Sorrentino, A.
Tuning the structural and functional properties of HAVOH-based composites via ionic liquid tailoring of MWCNTs distribution.
Composites Science and Technology. Roč. 207, 3 May (2021), č. článku 108742. ISSN 0266-3538. E-ISSN 1879-1050
Institutional support: RVO:61389013
Keywords : polymer composite * polymer-wrapped multi walled carbon nanotubes * ionic liquid
OECD category: Polymer science
Impact factor: 9.879, year: 2021
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/pii/S0266353821000981?via%3Dihub

The structural and functional properties of polymer composite materials strictly depend on the spatial distribution of fillers, such as multiwalled carbon nanotubes (MWCNTs), inside the matrix. Herein, novel composites have been obtained by embedding MWCNTs into a modified polyvinyl alcohol (HAVOH) matrix, using the ionic liquid (IL) 1-Benzyl-3-methylimidazolium chloride (BenzImCl) as compatibilizer. The composites were prepared by solvent-wrapping carbon nanotubes onto HAVOH powders, followed by the melt-compounding approach to produce pellets for Fused Deposition Modelling technology (FDM). The efficacy of both the process and the IL on tailoring the spatial distribution of the MWCNTs into the HAVOH matrix is thoroughly studied and correlated with the electrical conductivity of the resulting composites. The sample printed by FDM, containing 6 wt % of MWCNTs and 0.6 wt% of IL exhibited a percolating morphology and led to an electrical conductivity (σ) value of 1.2*10−2 S/m. Moreover, after annealing at 220 °C for 2 h the σ value increased up to 7.9*10−1 S/m. The thermal treatment in presence of the MWCNTs also induces the formation of crosslinked HAVOH molecules changing the composites from easily soluble to completely water insoluble materials. This revealed the potential of HAVOH-based composites as raw material for FDM technology to realize post-printing cross-linkable materials.
Permanent Link: http://hdl.handle.net/11104/0319048