Role of silane coupling agents for performance improvement of poly(vinyl acetate)/tetraethyl orthosilicate hybrid composites prepared by a sol-gel process

2001 ◽  
Vol 50 (11) ◽  
pp. 1247-1251 ◽  
Author(s):  
Jyongsik Jang ◽  
Joonwon Bae ◽  
Doohwan Kang
Keyword(s):  
Performance Improvement ◽  
Vinyl Acetate ◽  
Hybrid Composites ◽  
Sol Gel ◽  
Tetraethyl Orthosilicate ◽  
Coupling Agents ◽  
Silane Coupling Agents ◽  
Sol Gel Process ◽  
Silane Coupling

A Facial Route for Preparation of Hydrophobic Nano-Silica Modified by Silane Coupling Agents

2017 ◽  
Vol 727 ◽  
pp. 353-358 ◽  
Author(s):  
Jian Hui Luo ◽  
Yuan Yang Li ◽  
Ping Mei Wang ◽  
Bi Bo Xia ◽  
Li Peng He ◽  
...  
Keyword(s):  
Sol Gel ◽  
Silica Particles ◽  
Coupling Agents ◽  
Nano Silica ◽  
Silane Coupling Agents ◽  
Stöber Method ◽  
Inorganic Hybrid ◽  
Organic Functional Groups ◽  
Silane Coupling ◽  
The Fourier Transform

Nano-silica was prepared using tetraethylorthosilicate (TEOS) as precursor by sol-gel technology based on stÖber method. These silica nanoparticals were further modified with silane coupling agents, i.e., Hexadecyltrimethoxysilane (HDTMS), dimethoxydiphenylsilane (DMMPS), to introduce organic functional groups on the surface of SiO2 nanoparticles. The Fourier transform-infrared (FTIR) spectra indicated that these silane coupling agents were anchored on the surface of silica particles. And the obtained organic–inorganic hybrid SiO2 particles showed an improvement in hydrophobicity, which can effectively inhibit these silica particles from aggregating.

scholarly journals Synthesis of Zinc Oxide Nanomaterials via Sol-Gel Process with Anti-Corrosive Effect for Cu, Al and Zn Metallic Substrates

Coatings ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 444
Author(s):  
Raluca Somoghi ◽  
Violeta Purcar ◽  
Elvira Alexandrescu ◽  
Ioana Catalina Gifu ◽  
Claudia Mihaela Ninciuleanu ◽  
...  
Keyword(s):  
Contact Angle ◽  
Zinc Oxide ◽  
Sol Gel ◽  
Coupling Agents ◽  
Neutral Medium ◽  
Silane Coupling Agents ◽  
Corrosion Properties ◽  
Water Contact ◽  
Metallic Substrates ◽  
Silane Coupling

Nanosized zinc oxide (ZnO) particles modified with different silane coupling agents (octyltriethoxysilane (OTES), octadecyltriethoxysilane (ODTES) and (3-glycidyloxypropyl)trimethoxysilane (GPTMS)) were synthesized in basic catalysis using the sol-gel method. The structure and morphology were characterized by dynamic light scattering (DLS), environmental scanning electron microscopy (ESEM) and Fourier transform infrared spectroscopy (FTIR) for bonding characteristics. The final hybrid materials were deposited on three types of metallic substrates (aluminum (Al), copper (Cu) and zinc (Zn)) in order to obtain coatings with ultrahydrophobic and anti-corrosion properties. Water wettability was studied revealing a contact angle of 145° for the surface covered with ZnO material modified with ODTES. The water contact angle increased with the length of the alkyl chain supplied by the silica precursor. The anti-corrosive behavior of ZnO/silane coupling agents particles deposited on metallic substrates was studied by the linear polarization technique in neutral medium.

scholarly journals Robust Super-Repellent Anisotropic Silica Films by Emulsion-Based Sol–Gel Growth

NANO ◽  
2018 ◽  
Vol 13 (01) ◽  
pp. 1850005 ◽  
Author(s):  
Yingyu Zhou ◽  
Hongling Chen
Keyword(s):  
Sol Gel ◽  
Coupling Agents ◽  
Silane Coupling Agents ◽  
One Pot ◽  
Silica Films ◽  
Heat Treated ◽  
Silane Coupling ◽  
Silica Nanostructures ◽  
Oil Water ◽  
Harsh Conditions

In this paper, anisotropic SiO2 with different morphologies were synthesized through an emulsion-based one-pot method by adding various silane coupling agents. Silane coupling agents affected the growth of silica nanostructures at the oil/water interfaces. Robust super-repellent film that showed great durability under different harsh conditions were obtained by bonding the self-assembled anisotropic silica nanostructures (ASN) film to substrate by the commercial acrylic adhesive. The film switched from superhydrophobic (157.1[Formula: see text] to superhydrophilic (0[Formula: see text] after being heat-treated at 500[Formula: see text]C. Further, silane treatment with addition of acid reduced the time of modification. Meanwhile, silane grafting density was improved and superhydrophobicity of calcinated ASN films was regenerated.

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