Sains Malaysiana 51(9)(2022): 3019-3025

http://doi.org/10.17576/jsm-2022-5109-22

 

Cyclical Aging Tests in Latex Coating with TiO2 Nanoparticles by UVb Radiation

(Ujian Berkitar Penuaan dalam Salutan Lateks dengan Nanozarah TiO2 oleh Sinaran UVb)

 

JENNY MIRIAM FERNANDEZ-VIVANCO1,*, CÉSAR EDUARDO JIMÉNEZ-CALDERÓN2, ALDO JAVIER GUZMAN-DUXTAN3 & CARLOS ALBERTO LEVANO-HUAMACCTO4

 

1Quantum Chemistry and New Materials for Technological Innovation, Faculty of Medicine, National University of San Marcos, Lima, Peru

2César Vallejo University, Lima, Peru

3Department of Physics-chemistry, Faculty of Chemistry and Chemical Engineering,

National University of San Marcos, Lima, Peru

4Faculty of Natural Sciences and Mathematics, National University of Callao, Peru

 

Received: 14 November 2021/Accepted: 26 March 2022

 

Abstract

This study evaluated the properties of adhesion, cracking, rusting, and accumulated irradiance on the surface of four vinyl acrylic resin coatings. QUV accelerated aging technique was applied. The coatings accumulated irradiance in cyclic form and was controlled by the tests of atmospheric temperature and relative humidity. A paper money currency validator counterfeit has been used because of its constant irradiance of 1,41 mW/cm2; a power of 9 W of UV radiation; 220 V, ranging an equipment temperature (OPALUX) between 40 °C and 60 °C. Irradiance has been measured by using the UV light meter equipment model YK-35UV (2 to 20 mW/cm2). Latex coatings embedded with TiO2 nanoparticles and prepared in four different formulations with CaCO3 plus Diatomite were applied on a surface area of 5.5 cm length times 1.5 cm width. The exposition time ranged from 56 to 500 h of irradiance at a period span of eight h each day.  Coatings were altered on its properties of adhesion, elasticity and photooxidation on their surface.

 

Keywords: Aging technique; irradiance; latex coating; TiO2 nanoparticle

 

Abstrak

Kajian ini menilai sifat lekatan, keretakan, pengkaratan dan sinaran yang diterima pada permukaan empat salutan resin akrilik vinil. Teknik penuaan dipercepatkan QUV telah digunakan. Salutan menerima sinaran dalam bentuk kitaran dan dikawal oleh ujian suhu atmosfera dan kelembapan relatif. Pengesahan mata wang kertas palsu telah digunakan kerana sinaran malar 1,41 mW/cm2; kuasa 9 W sinaran UV; 220 V, dengan julat suhu peralatan (OPALUX) antara 40 °C dan 60 °C. Sinaran telah diukur menggunakan model peralatan meter cahaya UV YK-35UV (2 hingga 20 mW/cm2). Salutan lateks yang dibenamkan dengan nanozarah TiO2 dan disediakan dalam empat rumusan berbeza dengan CaCO3 dan Diatomit telah digunakan pada kawasan permukaan 5.5 cm panjang × 1.5 cm lebar. Masa dedahan adalah antara 56 hingga 500 jam penyinaran pada jangka masa lapan jam setiap hari. Salutan telah diubah pada sifat lekatan, keanjalan dan fotooksidasi pada permukaannya.

 

Kata kunci: Nanozarah TiO2; salutan lateks; sinaran; teknik penuaan

 

References

Agresti, G., Bonifazi, G., Calienno, L., Capobianco, G., Lo Monaco, A., Pelosi, C., Picchio, R. & Serranti, S. 2013. Surface investigation of photo - degraded wood by color monitoring, infrared spectroscopy, and hyperspectral imaging. Journal of Spectroscopy 2013: 380536.

Akbulut, G., Kayaoğlu, B.K., Eren, M., Yildiz, B. & Orbay, M. 2016. The effect of different radiation sources for the UV curing of a screen-printed, water-based polyurethane acrylate binder. Coloration Technology132(4): 269-279.

Andrés, A., Bustos, C., Lasserre, J.P. & Gacitua, W.2013. Efecto de un envejecimiento acelerado mediante rayos UV en la propagación superficial de grietas de bobinado en tableros contrachapados de Eucalyptus nitens. Maderas, Ciencia y Tecnología 15(1): 45-56.

ASTM G154-16. 2016. Standard Practice for Operating Fluorescent Ultraviolet (UV) Lamp Apparatus for Exposure of Nonmetallic Materials. American Society for Testing and Materials (ASTM).

ASTM D661-93. 2011. Standard Test Method for Evaluating Degree of Cracking of Exterior Paints.American Society for Testing and Materials (ASTM).

ASTM D3359-09. 2009. Standard Test Methods for Measuring Adhesion by Tape Test. ASTM International.

ASTM D610-08. 2008. Standard Practice for Evaluating Degree of Rusting on Painted Steel Surfaces. American Society for Testing and Materials (ASTM).

ASTM D4541-02. 2002. Standard Test Method for Pull-Off Strength of Coating using Portable Adhesion Testers. American Society for Testing and Materials (ASTM).

ASTM E1980-01. 2002. Standard Practice for Calculating Solar Reflecting Index of Horizontal and Low-Sloped Opaque Surfaces. American Society for Testing and Materials (ASTM).

Labordena, M., Naubauer, D., Folini, D., Patt, A. & Lillestam, J. 2018. Blue skies over China: The effect of pollution control on solar power generation and revenues. PLoS ONE 13(11): e207028.

Monfared, A.H. & Jamshidi, M. 2019. Effects of photocatalytic activity of nano TiO2 and PAni/TiO2 nanocomposite on the physical/mechanical performances of acrylic pseudo paints. Progress in Organic Coating 136: 105300.

Varganici, C.D., Rosu, L., Rosu, D., Mustata, F. & Rusu, T. 2020. Sustainable wood coatings made of epoxidized vegetable oils for ultraviolet protection. Environmental Chemistry Letters 19(1): 307-328.

Zhang, Y. & Zhai, X. 2019. Preparation and testing of thermochromic coatings for buildings. Solar Energy 191: 540-548.

 

*Corresponding author; email: Jenny.fernandez@unmsm.edu.pe

 

 

 

 
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