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Synthesis and characterization of silica nanoparticles with modified surface for hydrophobic coatings

TEODORA MĂLĂERU1, MIRELA MARIA CODESCU1, ELENA CHIȚANU1,* , GABRIELA GEORGESCU1, CRISTINA ANTONELA BANCIU1,* , RADU CRISTIAN DASCĂLU1, DELIA PĂTROI1, VIRGIL MARINESCU1, 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

The paper presents the synthesis of spherical silica nanoparticles with narrow particle size distribution by a PVP surfactant-assisted sol-gel process and the modification of their surface character through a post-grafting process with a silane (PFOTS). X-ray diffraction, FT-IR spectrometry and EDS compositional analysis confirm the formation of silica structures and the presence of the silane layer on their surface. The hydrophobic character was tested by measuring the water contact angle. The resulting value of 148° supports the change in the character of their surface from hydrophilic to hydrophobic..

Keywords

Silica nanoparticles, Sol-gel, Hydrophobicity, Silane.

Submitted at: June 24, 2021
Accepted at: Feb. 11, 2022

Citation

TEODORA MĂLĂERU, MIRELA MARIA CODESCU, ELENA CHIȚANU, GABRIELA GEORGESCU, CRISTINA ANTONELA BANCIU, RADU CRISTIAN DASCĂLU, DELIA PĂTROI, VIRGIL MARINESCU, ISTVAN BORBATH, Synthesis and characterization of silica nanoparticles with modified surface for hydrophobic coatings, Journal of Optoelectronics and Advanced Materials Vol. 24, Iss. 1-2, pp. 74-81 (2022)