The effect of nano-SiO2 particles and film thickness on physical properties of transparent wood coatings

Document Type : Research Paper

Authors

1 Department of Wood and Paper Sciences and Technology, Faculty of Materials Engineering and New Technologies, Shahid Rajaee Teacher Training University

2 Faculty of Wood and Paper Engineering, Gorgan University of Agricultural Sciences and Natural Resources

Abstract

In this study, the effect of different levels of nano-SiO2 particles and film thickness on physical properties of acid catalyzed and nitrocellulose transparent coatings applied to beech and spruce wood was investigated. Nano-SiO2 particles were added to coatings in order to improve adhesion characteristics and wettability behavior. For this purpose, specimens were prepared to dimensions of 220 ×80 ×20 mm. Nano-SiO2 particles were prepared at concentrations of 0, 0.5, 1 and 2 wt% and added to the acid catalyzed and nitrocellulose transparent coatings. To study the effect of different levels of film thickness on adhesion characteristics of nano coatings, specimens were coated at two levels of thickness of 60 µm and 120µm using film applicator. According to ASTM D 4541 standard, the adhesion strength of specimens was determined. Scratch resistance was determined according to ASTM D 3359. According to ASTM D 5946 standard, contact angle was measured. Results revealed that the highest adhesion strength was obtained in beech species coated with acid catalyzed containing 1% nano-SiO2 particles with thickness of 60 µm. Increasing the nano particles up to 2% had negative effect on adhesion characteristics.The increase of the film thickness decreased adhesion characteristics significantly. The increase of nano-SiO2 particles, up to 2%, increased the contact angle of the surfaces of specimens significantly. Thus the incorporation of nano-SiO2 particles into coatings, up to 1%, improved adhesion characteristics and the incorporation of nano-SiO2 particles into coatings, up to 2%, improved the wettability behavior of coatings. Furthermore applying films with lesser thickness led to increase of adhesion characteristics.

Keywords

Main Subjects

References

[1] Amerio,E., Fabbri,P., Malucelli, G., Messori,M., Sangermano, M., and Taurino, R., 2008. Scratch resistance of nano-silica reinforced acrylic coatings. Progress in Organic Coatings. 62: 129–133.
[2] Nikolic, M., Lawther, J.M., and Sanadi, A.R., 2015. Use of nanofillers in wood coatings: a scientific review. Journal of Coatings Technology and Research. 12 (3) 445–461.
[3] Zhang, X., Chen, R., and Hu, J., 2016. Superhydrophobic surface constructed on electrodeposited silica films by two-step method for corrosion protection of mild steel. Corrosion Science.104: 336–343.
[4] Othman,S.H., Abdul Rashid, S., Ghazi, T.I.M. and Abdullah1, N., 2012. Dispersion and stabilization of photocatalytic TiO2nanoparticles in aqueous suspension for coatings applications. Journal of Nanomaterials. 10 pages.
[5] Sun, L., and Gong, K., 2001. Silicon-based materials from rice husks and their applications. Industrial & Engineering Chemistry Research. 40: 5861-5877.
[6] Bergna, H.E., and Roberts, W.O.,2005. Colloidal silica: fundamentals and applications. Surfactant Science Series. Vol. 131, New York, CRC Press.
[8] Bauer, F.,and Mehnert, R., 2005.Uv curable acrylate nanocomposites: properties and applications. Journal of Polymer Research.12(6) : 483–491.
[9] Bulian, F., and Graystone. J.,2009. Wood coatings. Theory and Practice, Elsevier Science Ltd., Amsterdam.
[10] Mastouri, A., azadfallah, M., tarmian, A., and efhamisisi, D., 2018. The effect of cerium dioxide nanoparticles on the physical properties of polyurethane clear coating. Iranian Journal of Wood and Paper Industries. 8(4): 645-656.
[11] KhojastehKhosro, S.,Ghofrani, M., and Ganjaei sari, M.,2016.The effect of adding zinc oxide nanoparticles on color change and adhesion strength of polyurethane coating on wood surface. Iranian journal of wood and paper science research. 30(4):690-704.
[12] Cristea, M.V., Riedl, B., andBlanchet, P., 2010.Enhancing the performance of exterior waterborne coatings for wood by inorganic nanosized UV absorbers .progress in organic coatings. 69(4):432-441.
[13] Malaki, M., Hashemzadeh, Y., and Fadaei Tehrani, A., 2018. Abrasion resistance of acrylic polyurethane coatings reinforced by nanosilica.Progress in Organic Coatings. 507–515.
 [14] Pagnola, M.R.,Vivero,J.U., and Marrugo,A.G.,2018.New uses of micro and nanomaterials. Publisher: Intech Open. ISBN: 978-1-78984-173-2: 79-81.
[15] Bomba,J., Ježek,J., Hýsek,S., Sikora,A., Stolariková,R., Palacká,A.,Berková,M.,andKolbabová.T., 2017. Polyurethane coatings on hardwood and softwood surfaces:their resistance to household liquids as an educational case study. BioResources. 12(3): 5867-5877.
[16] Latibari, A., 2007. Science and technology of adhesion for lignocellulosic substances, Islamic Azad University publication, Karaj, ISBN No: 9644504194. P348.
[17] Pandit, S.K., Tudu, B.K., Mishra, I.M., and Kumar, A.,2019. Development of stain resistant, superhydrophobic and self-cleaning coating on wood surface. Progress in Organic Coatings.
[18] TSE -TS 2471. 1976. Wood - Determination of moisture content for physical and mechanical tests, TSE: Ankara, Turkey.
[19] ASTM D 2832. Standard Guide for Determining Volatile and Nonvolatile Content of Paint and Related Coatings.
 [20] Peng,Z. L.,and Chen, S.H.,2011. Effects of surface roughness and film thickness on the adhesion of a bioinspired nanofilm. Physical review E 83, 051915.
[21] Cheng, E., and Sun,X., 2006. Effects of wood-surface roughness, adhesive viscosity and processing pressure on adhesion strength of protein adhesive .Journal of adhesion science and technology. 20(9): 997–1017.
[22] Kaygin, B.,and Akgun, E., 2008. Comparison of conventional varnishes with nanolake UV varnish with respect to hardness and adhesion durability.International Journal of Molecular Sciences.476-485.
 [23] Budakci, M.,2003. Design and production of a new adhesion testing device and its utilization with testing of wood varnishes, Ph.D. Thesis, Department of Furniture and Decoration, Gazi University, Ankara.
[24] Ozdemir, T., Temiz, A., and Aydin, I., 2015. Effect of wood preservatives on surface properties of coated wood. Advances in Materials Science and Engineering.1-6.
[25] Parhizkari, M.M., Tarmian, A., Taghiyari, H.R., and Karimi, A.N., 2011. The effect of drying intensity and moisture content on longitudinal permeability of poplar tension and normal wood (populus nigra). Iranian Journal of Wood and Paper Science Research. 26(3):477-485.
[26] Panigrahi, S., Kumar, S., Panda, S., and Borkataki, S., 2018.Effect of permeability on primary processing of wood. Journal of Pharmacognosy and Phytochemistry. 7(4): 2593-2598.
[27] Ghofrani, M., Mohammad Moradi, Z., and KhojastehKhosro, S., 2016. Investigation on the effect of different methods of applying transparent coatings on adhesion strength of coating in wooden surfaces. Iranian Journal of Wood and Paper Science Research. 31(2):248-260.
[28] Manavi, G.H., Ghofrani, M., and Mirshokraei, S.A., 2012. Effects of wood type, moisture content and paint type on adhesion strength of conventional clear paints used in furniture manufacture. Iranian Journal of Wood and Paper Sciences Research. 27: 743-753.
[29] Rahman, I., andPadavettan, V., 2012. Synthesis of silica nanoparticles by sol-gel: size-dependent properties, surface modification, and applications insilica-polymer nanocomposites – a review. Journal of Nanomaterials. 1-15
[30] LabbaniMotlagh, A., Bastani, S., and Hashemi, M.M., 2014. Investigation of synergistic effect of nano sized Ag/TiO2particles onantibacterial, physical and mechanical properties of UV-curable clearcoatings by experimental design. Progress in Organic Coatings. 77: 502– 511.
 [31] Sow, C., Riedl, B., and Blanchet, P., 2010. UV-waterborne polyurethane-acrylate nanocomposite coatings containing alumina and silica nanoparticles for wood: Mechanical, optical, and thermal properties assessment. Journal of Coatings Technology and Research. 8 (2): 211–221.
[32] ErshadLangroudi, A., and Azadi, N., 2017. Hydrophobic coatings based on acrylic copolymers and the effect of adding nano silica. Advanced materials and novel coatings.6 (23): 1655-1668.
[33] Malaki, M., Hashemzadeh, Y., and Karevan, M., 2017.Effect of nano-silica on the mechanical properties of acrylic polyurethane coatings. Progress in Organic Coatings. 477–485.
[34] Karevan, M., and Kalaitzidou, K., 2013.Formation of a complex constrained region at the graphite nanoplatelets-polyamide 12 interface. Polymer. 54(14):3691-3698.
 [35] Sargsyan, A., Tonoyan, A., Davtyan, S., and Schick, C.,2007. The amount of immobilized polymer in PMMA SiO2 nanocomposites determined from calorimetric data. European Polymer Journal. 43 (8): 3113–3127.
[36] Gunduz, G., 2015. Chemistry, materials, and properties of surface coatings: traditional and evolving technologies. DEStech publication. ISBN No. 978-1-60595-066-2. Page: 650- 652.
[37] Talaei, A., Rezvani, M. H., and DoostMohammadi, H., 2018. Investigation of adhesion strength of alkyd and nitro cellulose transparent coatings in different heat-treated poplar wood. Journal of Color Science and Technology. 171-180.
Iranian Journal of Wood and Paper Industries
Volume 12, Issue 1
June 2021
Pages 1-15

Files

Share

How to cite

Statistics