0586491 - ÚMCH 2025 RIV CH eng J - Journal Article
Abdel-Mohsen, Abdellatif M. - Abdel-Rahman, Rasha M. - Kalina, L. - Vishakha, V. - Kaprálková, Ludmila - Němeček, Pavel - Jančář, J. - Kelnar, Ivan
Effect of chitin nanocrystal deacetylation on a nature-mimicking interface in carbon fiber composites.
Journal of Composites Science. Roč. 8, č. 5 (2024), č. článku 163. ISSN 2504-477X. E-ISSN 2504-477X
R&D Projects: GA MŠMT(CZ) LUAUS23004
Institutional support: RVO:61389013
Keywords : graphene oxide * chitin nanocrystals * delamination resistance
OECD category: Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics
Impact factor: 3, year: 2023
Method of publishing: Open access
Result website:
https://www.mdpi.com/2504-477X/8/5/163DOI: https://doi.org/10.3390/jcs8050163

The formation of a rigid, tough interface based on a nacre-like structure in carbon fiber (CF) composites is a promising way to eliminate low delamination resistance. An effective method of coating CFs is electrophoretic deposition (EPD), which, in the case of dissimilar components like graphene oxide (GO) and polymeric glue, usually requires chemical bonding/strong interactions. In this work, we focus on chitin nanocrystals (ChNCs), leading to an excellent mechanical performance of artificial nacre, where favorable interactions and bonding with GO are controlled by degrees of deacetylation (5, 15, and 30%). We prepared coatings based on GO/ChNC adducts with 95/5, 90/10, 50/50, and 25/75 ratios using optimized EPD conditions (pH, concentration, voltage, and time). The prepared materials were characterized using FTIR, TEM, XPS, SEM, DLS, and XRD. SEM evaluation indicates the formation of a homogeneous interlayer, which has a fair potential for chemical bonding with the epoxy matrix. Short-beam testing of epoxy matrix composites indicates that the coating does not decrease stiffness and has a relatively low dependence on composition. Therefore, all coatings are promising for a detailed study of delamination resistance using laminate samples. Moreover, facile EPD from the water solution/suspension has a fair potential for industrial applications.
Permanent Link: https://hdl.handle.net/11104/0354013