King Fahd University of Petroleum and Minerals

Sheffield Hallam University

Rami Khalid Suleiman

Bassam El Ali

Mansur Bala Ibrahim

Ahmad A Sorour

Tawfik Abdo Saleh

Sol-gel coating formulations including metal oxide particles such as aluminum oxide, calcium oxide, zinc oxide, magnesium oxide, and molybdenum oxide embedded in a hybrid polymer matrix based on a reacted form of a resin composition containing a tetraalkylorthosilicate, an aminoalkylsilane, a dialkoxysilane, and a silanol terminated polydimethylsiloxane. The sol-gel coating formulations are suitable for applications such as anticorrosive protective coatings of metal substrates (e.g. mild steel). These anticorrosive coated metal substrates are evaluated on their hydrophobicity (water contact angle), surface roughness, mechanical strength (e.g. hardness), adhesiveness to the substrate (e.g. critical load), and anticorrosiveness upon exposure to a saline solution (e.g. impedance value).

Cured siloxane coating and anticorrosion substrate formed therewith

Method for forming a sol-gel coating formulation

Metal oxide-containing sol-gel coating formulations

A complex of beta-cyclodextrin and graphene (CD-G) and a method of use of the complex in corrosion protection of the metal surfaces exposed to high saline concentrations. Composite laminates comprise CD-G, zinc (optionally magnesium) powder embedded in a resin matrix and adjacent to the metal, followed by polyurethane comprising a polymeric zinc chelator, followed by a hermetic sealant layer and finally by a hydrophobic self-cleaning fouling release layer as a topcoat. Optional managed stress of the laminated layers by temperature swings and mechanical vibration ensures resolution of local strain at the formative stage and not during functioning, producing defects that are healed during deposition of the next layer. More than 99% of the zinc and other toxic ions extracted from the metal and coating are intercepted by the selective chelator layer insulated under the sealer and fouling-release layers.

Graphene-cyclodextrin complex and its use in corrosion prevention

A solid-supported catalyst ligand which chelates palladium (II) species to form a complex that functions as a heterogeneous catalyst that is stable and can be recycled without significantly losing any catalytic activity in a variety of chemical transformations, a method for producing the solid-supported catalyst ligand and a method for catalyzing a palladium cross-coupling reaction, such as the Suzuki-Miyaura, Mizoroki-Heck, and Sonagashira reactions.

Aryl halide cross-coupling method and product made therefrom

Solid-supported catalyst for cross-coupling

Solid-supported palladium (II) complex as a heterogeneous catalyst for cross coupling reactions and methods thereof

Composite resins produced from chemical reactions among a polyglycol epoxide liquid epoxy resin, an aminosilane, tri- and/or tetra-alkoxysilanes and an isocyanate. The hybrid compositions are prepared by an in situ sol-gel process where components of the composition are mixed together sequentially. The composite resins are formed by a coupling reaction between the epoxide groups of the epoxy resin and the amino groups of the aminosilane. The silanes are hydrolyzed to form silanol groups which then undergo polycondensation to form an inorganic polymeric network of an intermediate. Finally, urethane moieties are introduced to the composite resins when unreacted hydroxyl groups from the intermediate react with the isocyanate. These composite resins are evaluated as protective coatings of mild steel substrates, including mechanical strength, anticorrosiveness in a saline medium, and adhesiveness to the mild steel substrates.

Epoxy composite resins and sol-gel compositions thereof

A catalytic process for synthesizing an ester compound, and a catalytic process for synthesizing an amide compound, wherein a solid-supported palladium catalyst is used to catalyze an alkoxycarbonylation reaction of an aryl halide to form the ester compound, or to catalyze an aminocarbonylation reaction of an aryl halide to form the amide compound. Various embodiments of each of the processes are also provided.

Palladium catalyzed synthesis of ester compounds

Catalytic process for synthesizing ester compounds and amide compounds

A palladium(II) complex which catalyzes the Sonogashira coupling reaction efficiently under aerobic condition and a method of employing the palladium(II) complex to synthesize internal alkynes. The palladium(II) complex is an effective catalyst for the coupling reactions of aryl iodo and diiodo compounds with unactivated alkyl alkynes and terminal dialkynes to produce various novel symmetrical dialkynes and disubstituted internal alkynes in excellent yields.

Growing community of inventors

Dhahran, Saudi Arabia

Rami Khalid Suleiman