Počet záznamů: 1
Effect of polydopamine coating of cellulose nanocrystals on performance of PCL/PLA bio-nanocomposites
- 1.0569363 - ÚMCH 2024 RIV CH eng J - Článek v odborném periodiku
Kelnar, Ivan - Kaprálková, Ludmila - Krejčíková, Sabina - Dybal, Jiří - Vyroubalová, Michaela - Abdel-Mohsen, Abdellatif M.
Effect of polydopamine coating of cellulose nanocrystals on performance of PCL/PLA bio-nanocomposites.
Materials. Roč. 16, č. 3 (2023), č. článku 1087. ISSN 1996-1944. E-ISSN 1996-1944
Grant ostatní: AV ČR(CZ) ASRT-19-06 3326
Program: Bilaterální spolupráce
Institucionální podpora: RVO:61389013
Klíčová slova: poly(lactic acid) * poly(ε-caprolactone) * cellulose nanocrystals
Obor OECD: Polymer science
Impakt faktor: 3.1, rok: 2023
Způsob publikování: Open access
https://www.mdpi.com/1996-1944/16/3/1087
In bio-nanocomposites with a poly(lactic acid) (PLA)/poly(ε-caprolactone) (PCL) matrix with neat and polydopamine (PDA)-coated cellulose nanocrystals (CNCd), the use of different mixing protocols with masterbatches prepared by solution casting led to marked variation of localization, as well as reinforcing and structure-directing effects, of cellulose nanocrystals (CNC). The most balanced mechanical properties were found with an 80/20 PLA/PCL ratio, and complex PCL/CNC structures were formed. In the nanocomposites with a bicontinuous structure (60/40 and 40/60 PLA/PCL ratios), pre-blending the CNC and CNCd/PLA caused a marked increase in the continuity of mechanically stronger PLA and an improvement in related parameters of the system. On the other hand, improved continuity of the PCL phase when using a PCL masterbatch may lead to the reduction in or elimination of reinforcing effects. The PDA coating of CNC significantly changed its behavior. In particular, a higher affinity to PCL and ordering of PLA led to dissimilar structures and interface transformations, while also having antagonistic effects on mechanical properties. The negligible differences in bulk crystallinity indicate that alteration of mechanical properties may have originated from differences in crystallinity at the interface, also influenced by presence of CNC in this area. The complex effect of CNC on bio-nanocomposites, including the potential of PDA coating to increase thermal stability, is worthy of further study.
Trvalý link: https://hdl.handle.net/11104/0340712
Počet záznamů: 1