Study on modification of nanosilica by polydimethylsiloxane used to increase the mechanical and environmental strength of electromagnetic transparent coating
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https://doi.org/10.54939/1859-1043.j.mst.88.2023.66-72Keywords:
Transparent electromagnetic; Polydimethylsiloxane; Anti-corrosion; Nanosilica.Abstract
Electromagnetic transparent coating is used to protect radars, and electromagnetic wave transceivers, coating has both a protective effect, and good environmental resistance, and also allows electromagnetic waves to pass through the coating and ensures the protection of electromagnetic waves. stable working of the radar. Enhancing the weather protection and environmental resistance of radars and electromagnetic wave transceivers, especially in marine and island climates, requires a transparent electromagnetic coating to meet durability. By modifying nano-silica with PDMS by sol-gel method and adding it to an electromagnetic transparent paint system, it was found that with a content of 2% compared to the mass of the film-forming agent, the mechanical and mechanical strength of the paint film was increased up to 200 kG.cm and environmental durability up to 60 salt-blind cycles, while the electromagnetic transparency of the paint film remains unchanged, reaching an average of over 99%.
References
[1]. Zahra Ranjbara, Saeed Rastegarb, “The influence of surface chemistry of nano-silica on microstructure,optical and mechanical properties of the nanosilica containing clear-coats”, Progress in Organic Coatings, 65(1), pp.125–130, (2009). DOI: https://doi.org/10.1016/j.porgcoat.2008.10.006
[2]. Malaki, M., Hashemzadeh, Y., & Karevan, M., “Effect of nano-silica on the mechanical properties of acrylic polyurethane coatings”, Progress in Organic Coatings, 101, pp. 477–485, (2016). DOI: https://doi.org/10.1016/j.porgcoat.2016.09.012
[3]. Hamedi, N., Hassanajili, S., & Sajedi, M. T., “An Investigation of Mechanical Properties of Polyurethane Nanocomposites with Various Silicas: Experimental Study and Modeling of Finite Deformation Response”, Silicon, 10(4), pp.1243–1255, (2017). DOI: https://doi.org/10.1007/s12633-017-9597-y
[4]. Matin, E., Attar, M. M., & Ramezanzadeh, B., “Investigation of corrosion protection properties of an epoxy nanocomposite loaded with polysiloxane surface modified nanosilica particles on the steel substrate”, Progress in Organic Coatings, 78, pp.395–403, (2015). DOI: https://doi.org/10.1016/j.porgcoat.2014.07.004
[5]. Ismail Ab Rahman, Vejayakumaran Padavettan, “Synthesis of Silica Nanoparticles by Sol-Gel: Size-Dependent Properties, SurfaceModification, and Applications in Silica-Polymer Nanocomposites—A Review”, Journal of Nanomaterials, pp.1 -16, (2012). DOI: https://doi.org/10.1155/2012/132424
[6]. Z. Ranjbara, S. Rastegar, “Nano mechanical properties of an automotive clear-coats containing nano silica particles with different surface chemistries”, Progress in Organic Coatings, 72(1 -2), pp.40–43, (2011). DOI: https://doi.org/10.1016/j.porgcoat.2010.11.001
[7]. Jian Li, Yushun Zhao, Jianlin Hu, Lichun Shu & Xianming Shi, “Anti-icing Performance of a Superhydrophobic PDMS/Modified Nano-silica Hybrid Coating for Insulators”, Journal of Adhesion Science and Technology, 26(4-5), pp. 665–679, (2012). DOI: https://doi.org/10.1163/016942411X574826
[8]. Đặng Trần Thiêm, Phạm Minh Tuấn, Phạm Xuân Thạo, Phạm Như Hoàn, Nguyễn Huy Thanh, Nguyễn Việt Long, “Nghiên cứu tổng hợp nhựa alkyd GP-019 và biến tính nhựa epoxy E-40 để chế tạo este epoxy alkyd E-30”, Tạp chí Nghiên cứu Khoa học và Công nghệ quân sự, 9-2020, pp. 155-161, (2020).
[9]. Protsak, I., Tertykh, V., Pakhlov, E., & Derylo-Marczewska, A., “Modification of fumed silica surface with mixtures of polyorganosiloxanes and dialkyl carbonates”, Progress in Organic Coatings, 106, pp. 163–169, (2017). DOI: https://doi.org/10.1016/j.porgcoat.2017.01.020
[10]. Ju, S., Chen, M., Zhang, H., & Zhang, Z., “Dielectric properties of nanosilica/low-density polyethylene composites: The surface chemistry of nanoparticles and deep traps induced by nanoparticles”. Express Polymer Letters, 8(9), pp. 682–691, (2014). DOI: https://doi.org/10.3144/expresspolymlett.2014.71
