2. Academic Validation
  3. The Influence of New Hydrophobic Silica Nanoparticles on the Surface Properties of the Films Obtained from Bilayer Hybrids

The Influence of New Hydrophobic Silica Nanoparticles on the Surface Properties of the Films Obtained from Bilayer Hybrids

  • Nanomaterials (Basel). 2017 Feb 20;7(2):47. doi: 10.3390/nano7020047.
Cristian Petcu 1,  Violeta Purcar 2,  Cătălin-Ilie Spătaru 3,  Elvira Alexandrescu 4,  Raluca Şomoghi 5,  Bogdan Trică 6,  Sabina Georgiana Niţu 7,  Denis Mihaela Panaitescu 8,  Dan Donescu 9,  Maria-Luiza Jecu 10
Affiliations

Affiliations

  • 1 R & D National Institute for Chemistry and Petrochemistry-ICECHIM, Polymers Department, Spl. Independentei 202, 6th District, 060021 Bucharest, Romania. cpetcu@icf.ro.
  • 2 R & D National Institute for Chemistry and Petrochemistry-ICECHIM, Polymers Department, Spl. Independentei 202, 6th District, 060021 Bucharest, Romania. violetapurcar@yahoo.com.
  • 3 R & D National Institute for Chemistry and Petrochemistry-ICECHIM, Polymers Department, Spl. Independentei 202, 6th District, 060021 Bucharest, Romania. spataru.catalin@gmail.com.
  • 4 R & D National Institute for Chemistry and Petrochemistry-ICECHIM, Polymers Department, Spl. Independentei 202, 6th District, 060021 Bucharest, Romania. elviraalexandrescu@yahoo.com.
  • 5 R & D National Institute for Chemistry and Petrochemistry-ICECHIM, Polymers Department, Spl. Independentei 202, 6th District, 060021 Bucharest, Romania. r.somoghi@gmail.com.
  • 6 R & D National Institute for Chemistry and Petrochemistry-ICECHIM, Polymers Department, Spl. Independentei 202, 6th District, 060021 Bucharest, Romania. trica.bogdan@gmail.com.
  • 7 R & D National Institute for Chemistry and Petrochemistry-ICECHIM, Polymers Department, Spl. Independentei 202, 6th District, 060021 Bucharest, Romania. sabina.nitu@yahoo.com.
  • 8 R & D National Institute for Chemistry and Petrochemistry-ICECHIM, Polymers Department, Spl. Independentei 202, 6th District, 060021 Bucharest, Romania. panaitescu@icf.ro.
  • 9 R & D National Institute for Chemistry and Petrochemistry-ICECHIM, Polymers Department, Spl. Independentei 202, 6th District, 060021 Bucharest, Romania. ddonescu@chimfiz.icf.ro.
  • 10 R & D National Institute for Chemistry and Petrochemistry-ICECHIM, Polymers Department, Spl. Independentei 202, 6th District, 060021 Bucharest, Romania. jecu.luiza@icechim.ro.
PMID: 28336881 DOI: 10.3390/nano7020047
Abstract

Ultra-hydrophobic bilayer coatings on a glass surface were fabricated by sol-gel process using hexadecyltrimethoxysilane (C16TMS) and tetramethoxysilane (TMOS) (1:4 molar ratio) as precursors. After coating, silica nanoparticles (SiO₂ NPs) functionalized with different mono-alkoxy derivatives (methoxytrimethylsilane, TMeMS; ethoxydimethylvinylsilane, DMeVES; ethoxydimethylphenylsilane, DMePhES; and methoxydimethyloctylsilane, DMeC₈MS) were added, assuring the microscale roughness on the glass surface. Influences of the functionalized SiO₂ NPs and surface morphology on the hydrophobicity of the hybrid films were discussed. The successful functionalization of SiO₂ NPs with hydrophobic alkyl groups were confirmed by Fourier transform infrared spectroscopy (FTIR). The thermal stability of hydrophobic SiO₂ NPs showed that the degradation of the alkyl groups takes place in the 200-400 °C range. Bilayer coating with C16TMS/TMOS and SiO₂ NPs modified with alkoxysilane substituted with C₈ alkyl chain (SiO₂ NP-C₈) has micro/nano structure. Hydrophobicity of functionalized SiO₂ NPs-C₈ and its higher degree of nanometer-scale roughness gave rise to ultra-hydrophobicity performance for bilayer coating C16TMS/TMOS + SiO₂ NPs-C₈ (145°), compared to Other similar hybrid structures. Our synthesis method for the functionalization of SiO₂ NPs is useful for the modification of surface polarity and roughness.

Keywords

nanostructuration; organic–inorganic hybrids; silica nanoparticles; sol–gel process; trialkylmonoalkoxysilanes.

Figures
Products