Temperature dependent surface modification of silica spheres with methacrylate

Abstract

Surface modification of silica spheres with 3-(Trimethoxysilyl)propylmethacrylate (TMSPM) has been performed at ambient condition. However, the FTIR spectra and field emission scanning electron microscope (FESEM) images show no evidence of the surface modification. The reaction temperatures were varied from 60 to 80 °C with various reaction periods. Small absorption shoulder of the C=O stretching vibration was at 1700 cm -1 , and slightly increased with the increase of the reaction time at 60 °C. The clear absorption peak appeared at 1698 cm -1 for the spheres reacted for 80 min at 70 °C and shifted toward 1720 cm -1 with the increase the reaction time. Strong absorption peak showed at 1698 cm -1 and shifted toward 1725 cm -1 with the increase of the reaction time at 80 °C. The spheres were dispersed to methanol and added photoinitiator (Irgacure-184). The solution was poured to a patterned glass substrate and exposed to the 254 nm UV-light during a self-assembly process. A large area and crack-free silica sphere film was formed. To increase the mechanical stability, a cellulose acetate solution was spin-coated to the film. The film was lift-off from the glass substrate to analyze the surface nanostructures. The surface nanostructures were maintained, and the film is stable enough to use as a mold to duplicate the nanopattern and flexible.

Photochemically Catalysed Polymerisation of 3-Trimethoxysilylpropyl Methacrylate Containing Silver, Copper and Zinc Ions

“…One of the widely used UV curable organoalkoxysilanes forming hybrid materials is 3-(trimethoxysilyl)propyl methacrylate (TMSPM), either in a pure form or in combination with silica alkoxides, e.g., tetraethylorthosilicate, which supports both organic and inorganic polymerisation processes and is known as a good sol-gel precursor. TMSPM is of a great interest to obtain hybrid materials for a large variety of photonic [24] and biomedical applications [25] thanks to the presence of hydrolysable functional groups and carbon-carbon double bond in its molecule. By varying the reaction conditions such as hydrolysis, solvent, initiator type, the final product can be tailored for specific purposes in terms of the optical, mechanical and chemical properties [26].…”