Transparent water repellent silica films by sol–gel process

Fabrication of durable hydrophobic cellulose surface from silane‐functionalized silica hydrosol via electrochemically assisted deposition

“…Functional silica sol doped with long‐chain silane agent can realize hydrophobic modification of substrate by creating a surface with certain degree of roughness and low surface free energy . Regarding eco‐friendly environment protection and cost‐saving, fluoride‐free long‐chain silane agents have been chosen to create hydrophobic surfaces . In general, sol‐gel hydrophobic finishing process involves relatively large quantities of organic solvents like ethanol as the cosolvent to promote the compatibility of organic precursor and deionized water for preparing a homogeneous phase .…”

Effect of abrasive particle size on tribochemical wear of monocrystalline silicon

“…5, a replacement of surface Si-H by Si-OH could occur continuously on the silicon surface in liquid water [29]. Because of the hydrolysis of SiO 2 network, the top surface of the SiO 2 tip also contains a high concentration of hydroxyl groups [30,31]. The dehydration and condensation reactions could then occur between two hydroxyl groups of Si surface and SiO 2 tip, thereby resulting in the formation of the Si-O-Si bridges across the sliding interface [18,19].…”

The influence of the hydrophobic agent, catalyst, solvent and water content on the wetting properties of the silica films prepared by one-step sol–gel method

“…In an aqueous solution, the ethoxy groups of ETES react with water to form reactive, hydrophilic silanol (Si─OH) groups and liberate free ethanol as a side product [15,16]. Then, the silanol groups condense to form silica nanoparticles by the following chemical reaction: ( However, using Iso-OTMS as a hydrophobic agent, the Hs from hydroxyl groups on silica surface are replaced by non-polar and hydrolytically stable O─Si─(C 8 H 17 ) groups through the siloxane bonds (Fig.1).…”