Properties and crystallization of PLLA biopolymers with cellulose nanocrystals and organic plasticizer
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24210%2F20%3A00007898" target="_blank" >RIV/46747885:24210/20:00007898 - isvavai.cz</a>
Result on the web
<a href="https://www.mmscience.eu/journal/issues/november-2020/articles/properties-and-crystallization-of-plla-biopolymers-with-cellulose-nanocrystals-and-organic-plasticizer" target="_blank" >https://www.mmscience.eu/journal/issues/november-2020/articles/properties-and-crystallization-of-plla-biopolymers-with-cellulose-nanocrystals-and-organic-plasticizer</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.17973/mmsj.2020_11_2020030" target="_blank" >10.17973/mmsj.2020_11_2020030</a>
Alternative languages
Result language
angličtina
Original language name
Properties and crystallization of PLLA biopolymers with cellulose nanocrystals and organic plasticizer
Original language description
The paper deals with the research of ternary nanocomposites based on PLLA nucleated by lignin coated cellulose nanocrystals (L-CNC) and simultaneously modified with an acetyl tributyl citrate (ATBC) plasticizer. The potential synergistic effect of both additives on the crystallization and morphology of nanocomposites is evaluated by differential scanning calorimetry (DSC) and scanning electronic microscopy (SEM). Mechanical properties were evaluated by tensile tests and fracture toughness measurements. DSC analysis showed a synergistic effect of both additives on the crystallization of PLLA. Ternary composites which were plasticized by 10 mass% of ATBC and simultaneously nucleated by L-CNC (1 and 5 mass%) increased the degree of crystallinity up to 2.5 times and manage to eliminate undesired cold crystallization during reheating. A dramatic increase in ductility, associated with a decrease in tensile strength and modulus, was observed with the incorporation of ATBC at 10 mass%. The ductility of the PLLA/10ATBC and PLLA/10ATBC/1L-CNC composites increased from 3 % (PLLA) up to 160 % and 300 %, respectively. Furthermore, SEM analysis showed that higher concentrations of spray-dried L-CNC (5 mass%) are difficult to disperse by used technology. These agglomerates subsequently act as stress concentrators that initiate premature failure of the composites. Although a suitable combination of tensile characteristics was achieved, PLLA/10ATBC/1L-CNC composites still show relatively low Charpy impact strength (15 kJ/m2)
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)
Result continuities
Project
<a href="/en/project/EF16_019%2F0000843" target="_blank" >EF16_019/0000843: Hybrid Materials for Hierarchical Structure</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
MM Science Journal
ISSN
1803-1269
e-ISSN
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Volume of the periodical
2020
Issue of the periodical within the volume
4
Country of publishing house
CZ - CZECH REPUBLIC
Number of pages
6
Pages from-to
4080-4085
UT code for WoS article
000590384500005
EID of the result in the Scopus database
2-s2.0-85095835891