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glycidoxypropyltrimethoxisilane
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Surface Modification of Nanosilica with Glycidoxypropyltrimethoxysilane and Investigating its Effect on the Physical and Mechanical Properties of Epoxy Resin
, M.Sc. Thesis Sharif University of Technology ; Mahmoudi Hashemi, Mohammad (Supervisor) ; Bastani, Saeed (Supervisor)
Abstract
In the first stage of this research, different amounts of glycidoxypropyltrimethoxysilane (GPS) were grafted as a coupling agent on the surface of nanosilica particles (NS). Surface characterization was done by Particle Size Analyzer and Thermal Gravimetric Analyzer (TGA) and that way, samples were distinguished from each other. More comparisons were taken by Scanning Electron Microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FTIR). Then the different amounts of modified NS were added into the matrix of an epoxy resin and the physical and mechanical properties of samples were tested with Abrasion Resistance test, Tensile Strength test, Thermal Mechanical Analysis (TMA),...
Synthesis and Evaluation of Antistatic Nanocoating Properties on Polymer Substrates
, M.Sc. Thesis Sharif University of Technology ; Dolati, Abolghasem (Supervisor)
Abstract
In this research, silica-based antistatic nanocoatings were prepared by sol-gel method and applied on polycarbonate substrate by immersion coating method, and their electrical and mechanical properties were investigated. Hybrid Sol was prepared by dehydration and condensation reaction of tetraethyl orthosilicate (TEOS) and 3-glycidoxypropyltrimethoxysilane (GPTMS) in the vicinity of acid catalyst and ethylenediamine (ED) as a curing agent. Quaternary ammonium silane was used as an antistatic agent, and 3-aminopropyltriethoxysilane (APTES) primer was used to increase the adhesion of the coating on the polycarbonate substrate. In order to investigate the effect of changing the quaternary...