Tailoring the graphene oxide chemical structure and morphology as a key to polypropylene nanocomposite performance
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F21%3A00547748" target="_blank" >RIV/61389013:_____/21:00547748 - isvavai.cz</a>
Result on the web
<a href="https://onlinelibrary.wiley.com/doi/10.1002/pc.26297" target="_blank" >https://onlinelibrary.wiley.com/doi/10.1002/pc.26297</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/pc.26297" target="_blank" >10.1002/pc.26297</a>
Alternative languages
Result language
angličtina
Original language name
Tailoring the graphene oxide chemical structure and morphology as a key to polypropylene nanocomposite performance
Original language description
In this work, we designed and studied two synthetic routes, based on modified Hummers method, to obtain graphene oxide (GO), and investigated their influence on the performance of polypropylene (PP)/GO nanocomposites. The two synthetic routes differed in the application condition of the oxidizing agent, potassium permanganate (KMnO4), which was added either as a powder (GO-P) or as a water solution (GO-S). This apparently subtle synthetic change yielded GOs with different degrees of oxidation and particle sizes, where GO-P presented a higher oxidation degree and smaller particles. The different GOs were then melt-blended with PP and the correlation between their different chemical/morphological structures and the nanocomposites' thermomechanical/rheological properties were evaluated. The milder oxidation process suffered by GO-S, and consequent less hydrophilic character, yielded a PP/GO-S nanocomposite with improved performance as the consequence of a better matrix/filler chemical affinity, mainly in compositions with lower GO-S contents. The thermal stability was increased by more than 10°C when 0.1 wt% GO-S was inserted into PP. When compared to the composition with 0.1 wt% GO-P, the increase was 13°C. Reinforcing effects were also observed in that sample (with 0.1 wt% GO-S), which exhibited the highest storage modulus and complex viscosity. These results suggest that tailoring the GO's oxidation degree and morphology is a key point to obtain an ideal interfacial interaction between phases.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10404 - Polymer science
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Polymer Composites
ISSN
0272-8397
e-ISSN
1548-0569
Volume of the periodical
42
Issue of the periodical within the volume
11
Country of publishing house
US - UNITED STATES
Number of pages
19
Pages from-to
6213-6231
UT code for WoS article
000693456800001
EID of the result in the Scopus database
2-s2.0-85114300273