Polyol mediated nano size zinc oxide and nanocomposites with poly(methyl methacrylate)

Abstract

Abstract. Organophilic nano ZnO particles have been synthesized in various diols (ethylene glycol -EG, 1,2 propane diol -PD, 1,4 butane diol -BD and tetra(ethylene glycol) -TEG) in the presence of p-toluenesulfonic acid, p-TsOH, as an end capping agent. The addition of p-TsOH reduces the ZnO particle size and increases its crystallite size. With increasing diol main chain length the ZnO particle size increases (EG (32 nm) < PD (33 nm) < BD (72 nm) < TEG (86 nm)). Using the assynthesized and unmodified ZnO nanocomposites with poly(methyl methacrylate), PMMA, matrix have been prepared by the in-situ bulk polymerization of methyl methacrylate, MMA. The addition of surface modifiers is avoided which is an advantage for the application since they can influence other properties of the material. ZnO particles, especially those with smaller particle sizes (EG -32 nm, PD -33 nm) showed enhanced effect on the thermal stability of PMMA, ultraviolet, UV, absorption and transparency for visible light. Transparent materials with high UV absorption and with enhanced resistance to sunlight were obtained by optimizing the nanocomposite preparation procedure using ZnO particles of about 30 nm size in concentrations between 0.05 and 0.1 wt%. The reported nanocomposite preparation procedure is compatible with the industrial process of PMMA sheet production.

In‐situ Glycine Sensor Development Based ZnO/Al2O3/Cr2O3 Nanoparticles

“…To evaluate the functional properties existing in ZnO/Al 2 O 3 /Cr 2 O 3 NPs, FTIR spectra was carried out as in Figure (b). As it is observed from Figure (b), there are two major peaks at 480 and 1130 cm −1 associated with metal‐oxygen (Zn−O/Cr−O/Al−O) and C−O bonds vibration ,. The Optical absorption (UV/vis) of ZnO/Al 2 O 3 /Cr 2 O 3 NPs was shown an intense and Sharp peak at 277 nm characteristic band for synthesized NPs as illustrated in Figure (c) ,.…”

Novel Green Route of Synthesis of ZnO Nanoparticles by Using Natural Biodegradable Polymer and Its Application as a Catalyst for Oxidation of Aldehydes

“…In most of the cases, ZnO nanoparticles have been prepared by solgel, combustion, precipitation, hydrothermal, solvothermal, chemical vapor deposition (CVD), microemulsion precipitation and microwave assisted thermal oxidation (7)(8)(9)(10)(11)(12). ZnO nanoparticles have been synthesized with different morphologies such as nanoflower, nanobelt, corallike, tube like, nanonail, ellipsoidal, nanocolloids, nanopowders (13,14).…”

The influence of oxide nanoparticles on the kinetics of free radical methyl methacrylate polymerization in bulk

“…The composites based on different polymeric matrix and inorganic fillers are characterized with a good combination of optical, electrical, magnetic, and mechanical properties, and improved chemical and fire resistance . Poly(methyl methacrylate) (PMMA) is an amorphous thermoplastic polymer with the excellent optical properties, high strength and dimensional stability , and its choice is based on remarkable mechanical properties, biocompatibility and transparency . PMMA material can replace the inorganic glass in many practical applications, due to its good impact resistance performance, and favorable processing properties .…”

“…The addition of oxide nanoparticles to monomer enables the preparation of PMMA hybrid materials with a high potential for new technologically attractive application areas (sensors, optoelectronic devices, protecting, and antireflective coatings, transparent barrier/protective layers), and with the enhanced thermal stability . The chemical composition and molecular weight of PMMA, as well as the average particle size and type, are important factors influencing PMMA nanocomposite properties .…”