This review describes the present state of science and technology of photopolymerizable (UV-curable) polyurethane (PU) nanocomposites which include nanosilica and organically-modified clay (organoclay). A number of documented improvements of properties of PU nanocomposites compared to the pristine PU are presented. Many data on the structure and properties of PU nanocomposites were obtained not...

In the reported work, wool fabric was coated with epoxy resin by hand layup method to fabricate wool-epoxy composites. Hydrophobic nanosilica used as a filler improve their mechanical characteristics. The physico-mechanical properties of composites were analyzed using various analytical techniques. surface morphology examined aid Scanning Electron Microscope. biodegradability developed determin...

Cement-based materials are ubiquitous in almost all built environment. In spite of this, little is known about the formation and the role played by the silicate chains always present in the cement nanostructure. By means of first principles simulations we provide compelling evidence on the pivotal role played by certain ionic species in the formation of the silicate chains inside the cementitio...

Heterogeneous proton exchange membranes (PEM) are synthesized using the dry phase inversion technique. The casting solutions are prepared by dispersing a finely ground cation exchange resin particle in N,N-dimethylacetamide (DMAc) solution of polyvinyl-chloride (PVC). Results show that ion exchange capacity is increased with the addition of 1 %-wt nanosilica (from 0.14 to 0.27 meq/g) while it i...

Abstract Concrete is one of the most extensively utilized building materials that can be produced, and has potential to release a significant quantity CO 2 into environment. In this research, through studying lightweight (LW) concrete, attempts are made produce environmentally friendly LW concrete with high strength using nanosilica rather than part cement waste glass powder instead aggregates....