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Comparative study of the hydrophobic properties of silicon dioxide particles functionalized with different agents

CRISTINA ANTONELA BANCIU1, ELENA CHIȚANU1,* , TEODORA MĂLĂERU1, VIRGIL MARINESCU1, MIRELA MARIA CODESCU1, GABRIELA GEORGESCU1, ISTVAN BORBATH2

Affiliation

  1. National Institute for Research and Development in Electrical Engineering ICPE-CA Bucharest, 313 Splaiul Unirii, 030138, Bucharest 3, Romania
  2. SC Roseal SA, 5/A N. Balcescu St., 535600, Odorheiu Secuiesc, Harghita, Romania

Abstract

Silica nanoparticles present special properties that give them extensive opportunities to be used in numerous applications, but one of the most spectacular application refers to the creation of surfaces with increased hydrophobicity and self-cleaning capabilities. The paper presents a comparative study of the hydrophobic properties of silicon dioxide (SiO2) fine particles functionalized with different agents. Spherical SiO2 particles with different sizes were synthesized by a sol-gel process and the modification of their surface was performed by a functionalization process with different silanes such as HMDS and PFOTS. The water contact angles for all analysed samples are higher than 138°, confirming the hydrophobic character of them. The functionalized SiO2 particles obtained in this study could be used as additive in paints for applications that required self-cleaning properties..

Keywords

Silicon dioxide fine particles, Sol-gel method, Hydrophobic surface, Water contact angle.

Submitted at: Sept. 13, 2022
Accepted at: Feb. 14, 2023

Citation

CRISTINA ANTONELA BANCIU, ELENA CHIȚANU, TEODORA MĂLĂERU, VIRGIL MARINESCU, MIRELA MARIA CODESCU, GABRIELA GEORGESCU, ISTVAN BORBATH, Comparative study of the hydrophobic properties of silicon dioxide particles functionalized with different agents, Journal of Optoelectronics and Advanced Materials Vol. 25, Iss. 1-2, pp. 89-95 (2023)