King Saud University

Ayman M Atta

Hamad Abdulla Al-Lohedan

Abdelrahman Osama Ezzat

Mahmood M S Abdullah

Mohamed Hasan Wahby

The modification of sand with superhydrophobic silica/wax nanoparticles may provide for water storage, applicable, for example, in desert environments. In particular, highly thermal stable superhydrophobic coats for sand are made of nanoparticles composed of superhydrophobic silica capped with paraffin wax. Superhydrophobic sand modified by such nanoparticles addresses issues of water storage in desert environments, capitalizing on sand resource utilization. Superhydrophobic sand, as modified, has excellent water repellency and great water-holding capacity. The superhydrophobic sand modified with superhydrophobic silica/wax nanoparticles can be applied for the desert water storage for agriculture and planting.

Modification of sand with superhydrophobic silica/wax nanoparticles

A method of synthesizing bimetallic oxide nanocomposites includes the steps of: providing a first metal salt solution; adding an oxidizing agent to the first metal salt solution while degassing the solution with an inert gas; heating the first metal salt solution; adding a second metal salt solution to the heated first metal salt solution to form a reaction mixture; adding a solution comprising a poly (ionic liquid) into the reaction mixture; adding a first base into the reaction mixture; adding a second base while stirring and maintaining a temperature ranging from about 40&#xb0; C. to about 65&#xb0; C. to provide a solution including a bimetallic oxide nanocomposite precipitate. The first metallic salt solution can include FeCldissolved in water. The second metallic salt solution can include CuCldissolved in water. The bimetallic oxide nanocomposites can be combined with epoxy resin to coat a steel stubstrate.

Synthesis of bimetallic oxide nanocomposites using poly (ionic liquid)

Synthesis of modified chitosan particles for oral insulin delivery includes amidation of chitosan with a fatty acid, a modified fatty acid, and/or an amino acid. The amidated chitosan can be grafted with N-isopropylacrylamide (NIPAm) and cross-linked to provide the modified chitosan particles.

Growing community of inventors

Cairo, Egypt

Ayman M Atta