Browse > Article
http://dx.doi.org/10.9713/kcer.2012.50.2.371

Synthesis and Characterization of Epoxy Silane-modified Silica/Polyurethane-urea Nanocomposite Films  

Joo, Jin (Department of Applied chemistry, Kyungpook National University)
Kim, Hyeon Seok (Department of Applied chemistry, Kyungpook National University)
Kim, Jin Tae (Surface Technology Research Group, POSCO)
Yoo, Hye Jin (Surface Technology Research Group, POSCO)
Lee, Jae Ryung (Surface Technology Research Group, POSCO)
Cheong, In Woo (Department of Applied chemistry, Kyungpook National University)
Publication Information
Korean Chemical Engineering Research / v.50, no.2, 2012 , pp. 371-378 More about this Journal
Abstract
Hydrophilic silica nanoparticles (SNPs) were treated by using 3-glycidoxypropyltrimethoxy silane (GPTMS) and then they were blended with polyurethane-urea (PUU) emulsions to obtain SNPs/PUU nanocomposite films. Thermo-mechanical properties of the nanocomposite films were investigated by varying the grafted amount of GPTMS onto SNPs and the contents of SNPs in the PUU matrix. The thermo-mechanical properties of the nanocomposite films were also compared in terms of the dispersibility of SNPs in the PUU matrix and thermal curing of the GPTMS-grafted SNPs. The maximum amount of grafted GPTMS was $1.99{\times}10^{-6}\;mol/m^2$, and which covered ca. 53% of the total SNP surface area. $^{29}Si$ CP/MAS NMR analyses with the deconvolution of peaks revealed the details of polycondensation degree and patterns of GPTMS in the surface modification of SNPs. The surface modification did not significantly affect colloidal stability of the SNPs in aqueous medium; however, the hydrophobic modification of SNPs offered a favorable effect on the dispersibility of SNPs in the PUU matrix as well as better thermal stability. XRD patterns revealed that GPTMS-grafted SNPs broadened the reduced the characteristic peak of polyol in PUU matrix. The composite films became rigid and less flexible as the SNP content increased from 5 wt.% to 20 wt.%. Particularly, Young's modulus and tensile modulus significantly increased after the thermal curing reaction of the epoxy groups in the SNPs.
Keywords
Polyurethane-urea; Silica Nanoparticles; Epoxy Silane; Nanocomposites;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Krishnamoorti, R., Vaia, R. A. and Giannelis, E. P., "Structure and Dynamics of Polymer-layered Silicate Nanocomposites," Chem. Mater., 8, 1728-1734(1996).   DOI   ScienceOn
2 Kornmann, X., Berglund, L. A. and Sterte, J., "Nanocomposites Based on Montmorillonite and Unsaturated Polyester," Polym. Eng. Sci., 38, 1351-1358(1998).   DOI   ScienceOn
3 Huang, J. C., Zhu, Z. K., Yin, J., Qian, X. F. and Sun, Y. Y., "Poly(etherimide)/montmorillonite Nanocomposites Prepared by Melt Intercalation: Morphology, Solvent Resistance Properties and Thermal Properties," Polymer, 42, 873-877(2000).
4 Huang, X. and Brittain, W. J., "Synthesis and Characterization of PMMA Nanocomposites by Suspension and Emulsion Polymerization," Macromolecules, 34, 3255-3260(2001).   DOI   ScienceOn
5 Moon, J. S., Park, J. H., Lee, T. Y., Kim, Y. W., Yoo, J. B., Park, C. Y., Kim, J. M. and Jin, K. W., "Transparent Conductive Film Based on Carbon Nanotubes and PEDOT Composites," Diamond Relat. Mater., 14, 1882-1887(2005).   DOI   ScienceOn
6 Xie, X.-L., Mai, Y.-W. and Zhou, X.-P., "Dispersion and Alignment of Carbon Nanotubes in Polymer Matrix: A Review," Mater. Sci. Eng., R: Reports, R49, 89-112(2005).
7 Lau, K.-T., Gu, C. and Hui, D., "A Critical Review on Nanotube and Nanotube/nanoclay Related Polymer Composite Materials," Composites, B: Eng., 37B, 425-436(2006).
8 Hughes, M., Shaffer, M. S. P., Renouf, A. C., Singh, C., Chen, G. Z., Fray, D. J. and Windle, A. H., "Electrochemical Capacitance of Nanocomposite Films Formed by Coating Aligned Arrays of Carbon Nanotubes with Polypyrrole," Adv. Mater., 14, 382-385(2002).   DOI   ScienceOn
9 Barthet, C., Hickey, A. J., Cairns, D. B. and Armes, S. P., "Synthesis of Novel Polymer-silica Colloidal Nanocomposites Via Free-radical Polymerization of Vinyl Monomers," Adv. Mater., 11, 408-410(1999).   DOI   ScienceOn
10 Petrovic, Z. S., Javni, I., Waddon, A. and Banhegyi, G., "Structure and Properties of Polyurethane-silica Nanocomposites," J. Appl. Polym. Sci., 76, 133-151(2000).   DOI   ScienceOn
11 Kim, B. K., Seo, J. W. and Jeong, H. M., "Properties of Waterborne Polyurethane/nano Silica Composite," Macromol. Res., 11, 198-201(2003).   DOI   ScienceOn
12 Chen, G., Zhou, S., Gu, G., Yang, H. and Wu, L., "Effects of Surface Properties of Colloidal Silica Particles on Redispersibility and Properties of Acrylic-based Polyurethane/silica Composites," J. Colloid Interface Sci., 281, 339-350(2005).   DOI   ScienceOn
13 Li, H., You, B., Gu, G., Wu, L. and Chen, G., "Particle Size and Morphology of Poly[styrene-co-(butyl acrylate)]/nano-silica Composite Latex," Polym. Int., 54, 191-197(2005).   DOI   ScienceOn
14 Oliveira, F. C., Barros-Timmons, A. and Lopes-da-Silva, J. A., "Preparation and Characterization of Chitosan/$SiO_2 $ Composite Films," J. Nanosci. Nanotech., 10, 2816-2825(2010).   DOI   ScienceOn
15 Palza, H., Vergara, R. and Zapata, P., "Improving the Thermal Behavior of Poly(propylene) by Addition of Spherical Silica Nanoparticles," Macromol. Mater. Eng., 295, 899-905(2010).   DOI   ScienceOn
16 Bliznyuk, V., Singamaneni, S., Kattumenu, R. and Atashbar, M., "Surface Electrical Conductivity in Ultrathin Single-wall Carbon Nanotube/polymer Nanocomposite Films," Appl. Phys. Lett., 88, 164101/164101-164103(2006).   DOI   ScienceOn
17 Zeng, Z., Yu, J. and Guo, Z., "Synthesis of Composite Nanoparticles Bearing Epoxy Functional Groups: Encapsulation of Silica by Emulsion Polymerization of GMA," J. Wuhan Univ. Technol., Mater. Sci. Ed., 21, 136-138(2006).   DOI   ScienceOn
18 Xiong, J., Zheng, Z., Qin, X., Li, M., Li, H. and Wang, X., "The Thermal and Mechanical Properties of a Polyurethane/multiwalled Carbon Nanotube Composite," Carbon, 44, 2701-2707 (2006).   DOI   ScienceOn
19 Ki, H. S., Yeum, J. H., Choe, S., Kim, J. H. and Cheong, I. W., "Fabrication of Transparent Conductive Carbon Nanotubes/polyurethane-urea Composite Films by Solvent Evaporation-induced Self-assembly(EISA)," Composite Sci. Tech., 69, 645-650(2009).   DOI   ScienceOn
20 Wang, Z., Zhou, Y., Yao, Q. and Sun, Y., "Preparation, Characterization and Infrared Emissivity Study of Helical Polyurethane@ $SiO_2 $ Core-shell Composite," Appl. Surf. Sci., 256, 1404-1408(2009).   DOI   ScienceOn
21 Park, S.-J. and Cho, K.-S., "Filler-elastomer Interactions: Influence of Silane Coupling Agent on Crosslink Density and Thermal Stability of Silica/rubber Composites," J. Colloid Interface Sci., 267, 86-91(2003).   DOI   ScienceOn
22 Song, S. K., Kim, J.-H., Hwang, K.-S. and Ha, K., "Spectroscopic Analysis of Silica Nanoparticles Modified with Silane Coupling Agent," Korean Chem. Eng. Res.(HWAHAK KONGHAK), 49, 181-186(2011).   DOI
23 Joseph, R., Zhang, S. and Ford, W. T., "Structure and Dynamics of a Colloidal Silica-poly(methyl methacrylate) Composite by $^{13}C$ and $^{29}Si$ MAS NMR Spectroscopy," Macromolecules, 29, 1305-1312(1996).   DOI   ScienceOn
24 Nishiyama, N., Asakura, T. and Horie, K., "Condensation Behavior of a Silane Coupling Agent in the Presence of Colloidal Silica Studied by Silicon-29 and Carbon-13 NMR," J. Colloid Interface Sci., 124, 14-21(1988).   DOI   ScienceOn
25 Roberts, I. M., "Tungsten Coating: a Method of Improving Glass Microtome Knives for Cutting Ultra-thin Frozen Sections," J. Microscopy, 103, 113-119(1975).   DOI   ScienceOn