PVA Nanocomposites Of Organoclays Obtained Using Different Cationic Surfactants

Abstract

This study is about preparation of two different organoclays with cationic surfactants and their poly(vinyl alcohol) nanocomposites with increased thermal and mechanical behavior. Organoclays were prepared modifying clay mineral with solution intercalation method using aqueous solutions of cationic surfactants dodecyltrimethylammonium bromide (DTABr) and cetylpyridinium bromide (CPBr). Obtained organoclays (D-MMT and C-MMT for DTABr/MMT and CPBr/MMT, respectively) were characterized using different methods including zeta potential and XRD. Results indicated an absolute decrease in zeta potential about 20 mV for C-MMT, and 14 mV for D-MMT indicating flocculation and coating of the surface. Moreover measurements indicated that interlayer distance increased based on basal spacing peak shift whose value was 1.27 nm for NaMMT, whereas 1.40 nm for D-MMT, and 1.75 nm for C-MMT. The organoclays were used in preparation of PVA/clay nanocomposites; thermal stability of the nanocomposites were determined using TGA, while mechanical strength measurements were done using DMA. Maximum thermal decomposition temperature of the pristine PVA and nanocomposites were compared and an average increase of 4°C were observed. Also activation energy of the decomposition was observed ca. 40 kj mol^-1 higher than pristine PVA.

Keywords

• Polymer/clay nanocomposites,Organoclay,Poly(vinyl alcohol) (PVA),Thermal stability,Cationic surfactants

References

1. Sinha Ray S, Okamoto M. Polymer/layered silicate nanocomposites: a review from preparation to processing. Progress in Polymer Science 2003;28:1539–641. DOI: 10.1016/j.progpolymsci.2003.08.002.
2. Fahmy TYA, Mobarak F. Nanocomposites from natural cellulose fibers filled with kaolin in presence of sucrose. Carbohydrate Polymers 2008;72:751–5. DOI: 10.1016/j.carbpol.2008.01.008.
3. Pavlidou S, Papaspyrides CD. A review on polymer-layered silicate nanocomposites. Progress in Polymer Science 2008;33:1119–98. DOI: 10.1016/j.progpolymsci.2008.07.008.
4. Mallakpour S, Dinari M. Biomodification of cloisite Na+ with L-methionine amino acid and preparation of poly(vinyl alcohol)/organoclay nanocomposite films. J Appl Polym Sci 2012;124:4322–30. DOI: 10.1002/app.35540.
5. Wang B, Yin Y, Liu C, Yu S, Chen K. Synthesis and characterization of clay/polyaniline nanofiber hybrids. J Appl Polym Sci 2013;128:1304–12. DOI: 10.1002/app.38472.
6. Utracki LA. Clay-containing polymeric nanocomposites. Shrewsbury: Rapra Technology Ltd; 2004. ISBN:1-85957-437-8.
7. Mandalia T, Bergaya F. Organo clay mineral–melted polyolefin nanocomposites Effect of surfactant/CEC ratio. Journal of Physics and Chemistry of Solids 2006;67:836–45. DOI: 10.1016/j.jpcs.2005.12.007.
8. Kokabi M, Sirousazar M, Hassan ZM. PVA–clay nanocomposite hydrogels for wound dressing. European Polymer Journal 2007;43:773–81. DOI: 10.1016/j.eurpolymj.2006.11.030.

9. Rhim J-W, Park H-M, Ha C-S. Bio-nanocomposites for food packaging applications. Progress in Polymer Science 2013;38:1629–52. DOI: 10.1016/j.progpolymsci.2013.05.008.
10. Mermut AR, Lagaly G. Baseline Studies of the Clay Minerals Society Source Clays: Layer-Charge Determination and Characteristics of Those Minerals Containing 2:1 Layers. Clays and Clay Minerals 2001;49:393–7. DOI: 10.1346/CCMN.2001.0490506.
11. Lagaly G, Reese M, Abend S. Smectites as colloidal stabilizers of emulsions I. Preparation and properties of emulsions with smectites and nonionic surfactants. Applied Clay Science 1999;14:83–103. DOI: 10.1016/S0169-1317(98)00051-9.
12. Turhan Y, Alp ZG, Alkan M, Doğan M. Preparation and characterization of poly(vinylalcohol)/modified bentonite nanocomposites. Microporous and Mesoporous Materials 2013;174:144–53. DOI: 10.1016/j.micromeso.2013.03.002.
13. Mallakpour S, Dinari M. Novel bionanocomposites of poly(vinyl alcohol) and modified chiral layered double hydroxides: Synthesis, properties and a morphological study. Progress in Organic Coatings 2014;77:583–9. DOI: 10.1016/j.porgcoat.2013.11.021.
14. Mallakpour S, Dinari M. Synthesis and Properties of Biodegradable Poly(vinyl alcohol)/Organo-nanoclay Bionanocomposites. J Polym Environ 2012;20:732–40. DOI: 10.1007/s10924-012-0432-7.
15. Bhattacharya M, Chaudhry S. High-performance silica nanoparticle reinforced poly (vinyl alcohol) as templates for bioactive nanocomposites. Materials Science and Engineering: C 2013;33:2601–10. DOI: 10.1016/j.msec.2013.02.029.
16. Sancha R, Bajpai J, Bajpai AK. Studies on transport of vapor and solute molecules through polyvinyl alcohol-based clay containing nanocomposites. Polym Compos 2011;32:537–45. DOI: 10.1002/pc.21073.
17. Lai JC-H, Rahman MR, Hamdan S, Liew FK, Rahman MM, Hossen MF. Impact of nanoclay on physicomechanical and thermal analysis of polyvinyl alcohol/fumed silica/clay nanocomposites. J Appl Polym Sci 2015;132. DOI: 10.1002/app.41843.
18. Li C, Li Y, She X, Vongsvivut J, Li J, She F, et al. Reinforcement and deformation behaviors of polyvinyl alcohol/graphene/montmorillonite clay composites. Composites Science and Technology 2015;118:1–8. DOI: 10.1016/j.compscitech.2015.08.008.
19. Worrall WE. Clays and ceramic raw materials. London: Elsevier; 1986. ISBN: 978-1851660049
20. Broido A. A simple, sensitive graphical method of treating thermogravimetric analysis data. Journal of Polymer Science Part A-2: Polymer Physics 1969;7:1761–73. DOI: 10.1002/pol.1969.160071012
21. Ünlü CH, Günister E, Atıcı O. Effect of acidity on xylan–montmorillonite bionanocomposites. Materials Chemistry and Physics 2012;136:653–60. DOI: 10.1016/j.matchemphys.2012.07.038.
22. Vaia RA, Teukolsky RK, Giannelis EP. Interlayer Structure and Molecular Environment of Alkylammonium Layered Silicates. Chemistry of Materials 1994;6:1017–22. DOI: 10.1021/cm00043a025.
23. Pan J, Yang G, Han B, Yan H. Studies on Interaction of Dodecyltrimethylammonium Bromide with Na- and Al-Montmorillonite. Journal of Colloid and Interface Science 1997;194:276–80. DOI: 10.1006/jcis.1997.5119.
24. Chen G, Han B, Yan H. Interaction of Cationic Surfactants with Iron and Sodium Montmorillonite Suspensions. Journal of Colloid and Interface Science 1998;201:158–63. DOI: 10.1006/jcis.1998.5408.
25. İşçi S, Ece ÖI, Güngör N. Characterization of Rheology, Electrokinetic Properties, and Surface Micromorphology of DTABr-MMT and CPBr-MMT Organoclays. Journal of Composite Materials 2006;40:1105–15. DOI: 10.1177/0021998305057369.
26. Jayasekara R, Harding I, Bowater I, Christie GBY, Lonergan GT. Preparation, surface modification and characterisation of solution cast starch PVA blended films. Polymer Testing 2004;23:17–27. DOI: 10.1016/S0142-9418(03)00049-7.
27. Alemdar A, Güngör N, Ece ÖI, Atıcı O. The rheological properties and characterization of bentonite dispersions in the presence of non-ionic polymer PEG. Journal of Materials Science 2005;40:171–7. DOI: 10.1016/S1353-8020(09)00312-5.
28. Marel HW van der, Beutelspacher H. Atlas of infrared spectroscopy of clay minerals and their admixtures. Amsterdam: Elsevier Scientific Pub. Co.; 1976. ISBN: 978-0444411877
29. Peng Z, Kong LX. A thermal degradation mechanism of polyvinyl alcohol/silica nanocomposites. Polymer Degradation and Stability 2007;92:1061–71. DOI: 10.1016/j.polymdegradstab.2007.02.012.
30. Gilman JW, VanderHart DL, Kashiwagi T. Thermal Decomposition Chemistry of Poly(vinylalcohol). In: Nelson GL, editor. Fire and Polymers II: Materials and Test for Hazard Prevention, Washington, DC: American Chemical Society; 1994, p. 161–85.ISBN: 978-0841232310
31. Goiti E, Salinas MM, Arias G, Puglia D, Kenny JM, Mijangos C. Effect of magnetic nanoparticles on the thermal properties of some hydrogels. Polymer Degradation and Stability 2007;92:2198–205. DOI: 10.1016/j.polymdegradstab.2007.02.025.