Browse > Article
http://dx.doi.org/10.9713/kcer.2012.50.2.292

The Viscosity and Rheology of the Silica Dispersion System with UV Curable Monomers  

Ahn, Jae-Beom (Noroo Bee Chemical Co.)
Cho, Bong-Sang (Department of Chemical Engineering, Hanyang University)
Yoo, Eui-Sang (KITECH Textile Ecology Laboratory)
Noh, Si-Tae (Department of Chemical Engineering, Hanyang University)
Publication Information
Korean Chemical Engineering Research / v.50, no.2, 2012 , pp. 292-299 More about this Journal
Abstract
We made 8 wt% silica dispersion system with fumed silica and photo curable acrylic monomer by beads mill process. These dispersions could be applied in organic/inorganic hybrid coating systems. These dispersions could be applied in organic/inorganic hybrid coating systems. The 4 species of photo curable acrylic monomer which was presence of hydroxyl group, different solubility parameter, and different molecular size were used in the silica dispersions. Stability of polar solvent, isopropyl alcohol, in silica dispersions was investigated. We investigated the stability of silica dispersions by using steady-state and dynamic rheology. As the monomer has hydroxyl group increased in mono and binary monomer silica dispersions, they showed non flocculated stable sol (loss modulus (G")> storage modulus (G')). When polar solvent IPA was added into slightly flocculated silica dispersions, they changed to non flocculated stable sol.
Keywords
Photo Curable Acrylic Monomer; Silica; Silica Dispersion; Rheology; Solvation Effect;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Degussa Technical Bulletins: Basic Characteristics of Aerosil (No. 11), Degussa Corp, Akron, OH(1993).
2 Greenberg, S. A., Jarnutowski, R. and Chang, T. N., "The Behavior of Polysilicic Acid. II. The Rheology of Silica Suspensions," J. Colloid Sci., 20(1), 20-43(1965).   DOI   ScienceOn
3 Allen, L. H. and Matjevic, E., "Stability of Colloidal Silica: I. Effect of Simple Electrolytes," J. Colloid Interface Sci., 31(3), 287-296 (1969).   DOI   ScienceOn
4 Harding, R. D., "Stability of Silica Dispersions," J. Colloid Interface Sci., 35(1), 172-174(1971).   DOI   ScienceOn
5 Benitez, R., Contreras, S. and Goldfarb, J., "Dispersions of Methylated Silica in Mixed Solvents," J. Colloid Interface Sci., 36(1), 146-150(1971).   DOI   ScienceOn
6 Vincent, B., Kiraly, Z., Emmett, S. and Beaver, A., "The Stability of Silica Dispersions in Ethanol/Cyclohexane Mixtures," Colloids Surf., 49, 121-132(1990).   DOI   ScienceOn
7 Kiraly, Z., Turi, L., Dekany, I., Bean, K. and Vicent, B., "Van Der Waals Attraction Between Stber Silica Particles in a Binary Solvent System," Colloid Polym Sci., 274(8), 779-787(1996).   DOI   ScienceOn
8 Bauer, F., Ernst, H., Decker, U., Findeisen, M., Glasel, H. J., Hartman, E., Langguth, H., Mehnert, R. and Penker, C., "You Have Full Text Access to This Content Preparation of Scratch and Abrasion Resistant Polymeric Nanocomposites by Monomer Grafting Onto Nanoparticles, 1. FTIR and Multi-nuclear NMR Spectroscopy to the Characterization of Methacryl Grafting," Macromol. Chem. Phys., 201(18), 2654-2659(2000).   DOI   ScienceOn
9 Schwalm, R., UV Coatings: Basics, Recent Developments and New Applications, Elsevier(2007).
10 Gigant, K., Posset, U., Schottner, G., Baia, L., Kiefer, W. and Popp, J., "Inorganic-Organic Cross-Linking in UV Curable Hard Coats Based Upon Vinyltriethoxysilane-Tetraethoxysilane-Polyfunctional Acrylate Hybrid Polymers: A Raman Spectroscopic Study," J. Sol-Gel Sci. Technol., 26, 369-373(2003).   DOI   ScienceOn
11 Im, J. K., "Preparation and Properties of Photocurable Aliphatic Epoxy Modified Acrylates and Hyperbranched Acrylates," Ph. D. Dissertation, Hanyang University, Seoul, Korea(2005).
12 Peschel, G., Belouschek, P., Muller, M. and Konig, R., "The Interaction of Solid Surfaces in Aqueous Systems," Colloid Polym. Sci., 260(4), 444-452(1982).   DOI   ScienceOn
13 Sawitowski, T., "The Use of Nanoadditives to Improve Scratch Resistance of Radiation Curable Coatings," Proc. RadTech 2006, Conference, Chicago, IL(2006).
14 Russel, W. B., Saville, D. A. and Schowalter, W. R., Colloidal dispersion, Cambridge Univ. Press, New York(1989).
15 Ahn, J. B. and Noh, S. T., "The Rheology of the Silica Dispersion System with Single and Mixed Solvent," Appl. Chem. Eng., 20(6), 685-691(2009).
16 Raghavan, S. R. and Khan, S. A., "Shear-induced Microstructural Changes in Flocculated Suspensions of Fumed Silica," J. Rheol., 39(6), 1311-1325(1995).   DOI   ScienceOn
17 Lujean, B. and Josh, O., Paint and Coating Industry., March, (2003).
18 Raghavan, S. R., Hou, J., Baker, G. L. and Khan, S. A., "Colloidal Interactions between Particles with Tethered Nonpolar Chains Dispersed in Polar Media: Direct Correlation between Dynamic Rheology and Interaction Parameters," Langmuir., 16(3), 1066-1077(2000).   DOI   ScienceOn
19 Raghavan, S. R., Khan, S. A. and Walls, H. J., "Rheology of Silica Dispersions in Organic Liquids: New Evidence for Solvation Forces Dictated by Hydrogen Bonding," Langmuir., 16(21), 7920-7930(2000).   DOI   ScienceOn