Synthesis of luminescent polycarbonate grafted with methyl methacrylate/europium complex using supercritical CO2 technology as a green chemistry method

Abstract

Modification of polymers using supercritical carbon dioxide (scCO 2 ) impregnation technology is an advantageous method for imparting desirable properties into a new polymer formulation without the architecture of the material being affected. Methyl methacrylate (MMA) and acrylic complex of europium [Eu(TTA) 3 AA] were impregnated on polycarbonate (PC) in the scCO 2 phase. There was an increase in the amount of grafted Eu(TTA) 3 AA complex up to 6 h of impregnation, reaching 0.24% of grafting. For longer times of grafting, it was observed a small decrease in the amount of Eu(TTA) 3 AA complex in the PC polymer. On the other hand, the total amount of grafted MMA/Eu(TTA) 3 AA monomers increased for up to 10 h of impregnation. The PC-g-MMA/Eu(TTA) 3 AA copolymers showed appreciable luminescence emission at room temperature. Furthermore, the SEM images show that there was no formation of agglomerates in the structure of the copolymers over the grafting process, suggesting a excellent distribution of Eu(TTA) 3 AA complex in the copolymer matrix.

Synthesis and Characterization of Polycarbonate Copolymers Containing Benzoyl Groups on the Side Chain for Scratch Resistance

“…The monomer of DBHP was prepared by the modified literature procedure [17][18][19]. In the literature, mono-and dibenzoyl biphenols were obtained as the products, and they could be only separated by column chromatography, resulting in a low yield.…”

“…(3) Many researchers studied transparent ultrahydrophobic silica films modified alkoxysilane by the sol-gel process under UV irradiation [16]. Several authors reported to enhance the scratch resistance of polycarbonate with SiO 2 and TiO 2 using microwave-assisted sol-gel heating [17,18]. The morphology of the fabric with alkali treatment and polycarbonate coating was studied using the scanning electron microscopy and polarized optical microscopic techniques [19].…”

Polymerization of <i>D,L</i>-Lactide and <i>In Situ</i> Fabrication of PDLLA Porous Scaffolds in Supercritical Carbon Dioxide

“…However, for medical applications, the presence of toxic substances from the preparation process in the final materials is critical. Recently, there has attracted a lot of interesting in the synthesis and the processing of biomaterials and tissue engineering scaffold using supercritical carbon dioxide (scCO 2 ) as reaction media due to its low toxicity and inexpensive [3] . There are lots of works have reported synthesis of biodegradable polyester in scCO 2 .…”