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Effect of polydopamine coating of cellulose nanocrystals on performance of PCL/PLA bio-nanocomposites
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SYSNO ASEP 0569363 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Effect of polydopamine coating of cellulose nanocrystals on performance of PCL/PLA bio-nanocomposites Author(s) Kelnar, Ivan (UMCH-V) RID, ORCID
Kaprálková, Ludmila (UMCH-V)
Krejčíková, Sabina (UMCH-V)
Dybal, Jiří (UMCH-V) RID, ORCID
Vyroubalová, Michaela (UMCH-V) ORCID
Abdel-Mohsen, Abdellatif M. (UMCH-V) ORCID, RIDArticle number 1087 Source Title Materials. - : MDPI
Roč. 16, č. 3 (2023)Number of pages 17 s. Language eng - English Country CH - Switzerland Keywords poly(lactic acid) ; poly(ε-caprolactone) ; cellulose nanocrystals Subject RIV CD - Macromolecular Chemistry OECD category Polymer science Method of publishing Open access Institutional support UMCH-V - RVO:61389013 UT WOS 000930155800001 EID SCOPUS 85147848597 DOI 10.3390/ma16031087 Annotation 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.
Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2024 Electronic address https://www.mdpi.com/1996-1944/16/3/1087
Number of the records: 1