Fabrication of new Fe-phthalocyanine oligomer–magnetite hybrid magnetic nano particles and their effects on the LCST behavior of thermo-sensitive poly(N-isopropylacrylamide-co-acrylic acid) magnetic nanocomposites

Nanomaterials Based on Fe3O4 and Phthalocyanines Derived from Cashew Nut Shell Liquid

“…Many studies related to hybrids have described the chemical interaction between phthalocyanine molecules and solid-state nanoparticles occurring through phthalocyanine’s peripheral functional groups that can anchor the particles’ surfaces [24,25,26,27]. Other reports have addressed a physical interaction, including alkyl chains in the phthalocyanine peripheral structure [28,29,30]. In the present study we report the successful synthesis of novel magnetic nanomaterials made by the combination of magnetite Fe 3 O 4 nanoparticles, with the surface functionalized in sequence with oleic acid and cardanol-derived phthalocyanines; the latter passivation is favored by Van der Waals interactions between alkyl chains.…”

Silver nanoparticle-loaded microgel-based etalons for H2O2sensing

“…As shown in Fig. 2 , the pure pNIPAm- co -AAc microgels exhibited a series of bands centered at 3306 cm −1 , 1715 cm −1 , 1649 cm −1 and 1541 cm −1 , which were attributed to the N–H stretching, 44 free carboxyl group (–COOH), 45 the amide carbonyl I bond, 46 and the amide carbonyl II bond, 47 respectively, in accordance with the characteristic IR absorption of the pNIPAm- co -AAc polymers. 41 The incorporation of AgNPs to form the hybrid microgels was shown to lead to three major changes, as shown in Fig.…”

Fabrication of a novel core–shell–shell temperature-sensitive magnetic composite with excellent performance for papain adsorption

“…35 When the Fe 3 O 4 hybrid nanoparticle content was increased, the LCST of Fe 3 O 4 @SiO 2 @-P(NIPAM-co-VI) increased to 41.52 C because nanoparticlenanoparticle interactions that makes the polymer aggregation be more difficult during the LCST. 36,37 In addition, the volume phase transition of Fe 3 O 4 @SiO 2 @P(NIPAM-co-VI) occurred continuously over a narrow range of temperatures (39.92-43.56 C), which indicates that the composite has good temperature sensitivity. 19,38 Optimization of conditions for papain adsorption onto the magnetic composite Effect of initial concentration of papain on papain adsorption.…”