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AuthorYang, J.H.
AuthorZhang, W.
AuthorRyu, H.
AuthorLee, J.H.
AuthorLee, J.-H
AuthorPark, D. H.
AuthorChoi, J.Y.
AuthorVinu, A.
AuthorElzatahry, A.A
AuthorChoy, J. H.
Available date2022-05-22T09:12:27Z
Publication Date2015
Publication NameJournal of Materials Chemistry A
ResourceScopus
Identifierhttp://dx.doi.org/10.1039/c5ta06271c
URIhttp://hdl.handle.net/10576/31382
AbstractOrgano-layered double hydroxide/polypropylene (LDH/PP) nanocomposites were successfully synthesized via a solution blending method. As an attempt to improve the compatibility with hydrophobic PP, the LDH surface was modified by the incorporation of various anionic surfactants via electrostatic interaction with LDH cationic layers. Surfactants were selected by considering the aliphatic carbon chain length (laurate, palmitate, stearate and dodecyl sulfate) and anionic functional groups (-COO-, -OPO32-, and -OSO3-) with the purpose of optimizing the homogeneous dispersion in the PP matrix. In PP nanocomposites containing LDH modified with alkyl carboxylate, the (00l) X-ray diffraction (XRD) peaks originating from organo-LDH were not observed, indicating that organo-LDH layers were fully exfoliated and homogeneously dispersed within the PP matrix, which were also confirmed by cross-sectional TEM analysis. However, PP nanocomposites containing LDH modified with dodecyl sulfate and lauryl phosphate showed broad (00l) XRD peaks, indicating that organo-LDH was partially exfoliated. According to the thermogravimetric analysis, the thermal stability (T0.5) of organo-LDH/PP nanocomposites was significantly improved by 37-60 K, depending on the type and loading content of organo-LDH compared to that of pristine PP. PP nanocomposites containing well-dispersed organo-LDH showed substantial enhancement of the elastic modulus with little decrease of tensile strength. These results are due to the increased interface volume fraction provided by the exfoliated LDH nanosheets. The Royal Society of Chemistry.
Languageen
PublisherRoyal Society of Chemistry
SubjectAnionic surfactants
Blending
Carbon
Carboxylation
Cationic surfactants
Nanosheets
Palmitic acid
Surface active agents
Tensile strength
Thermodynamic stability
Thermogravimetric analysis
X ray diffraction
Aliphatic carbon
Anionic surfaces
Cross-sectional TEM
Homogeneous dispersions
Layered double hydroxides
Organo layered double hydroxides
PP nanocomposite
Solution blending
Nanocomposites
TitleInfluence of anionic surface modifiers on the thermal stability and mechanical properties of layered double hydroxide/polypropylene nanocomposites
TypeArticle
Pagination22730-22738
Issue Number45
Volume Number3
dc.accessType Abstract Only


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