Novel polyurethane rigid foam/organically modified iron oxide nanocomposites

Abstract

Magnetic polyurethane rigid foam nanocomposites were synthesized by incorporation of surface functionalized iron oxide nanoparticles with 3‐aminopropyltriethoxysilane (APTS). Magnetite nanoparticles (MNPs) and Fe3O4@APTS were synthesized via co‐precipitation and sol–gel methods, respectively. The main purpose of the surface modification of MNPs was the formation of hydrogen bond between amino groups of Fe3O4@APTS with the urethane groups to improve magnetic and thermal properties of the nanocomposites. The effect of different amounts of Fe3O4@APTS on the thermal and magnetic behavior of resultant nanocomposite was investigated and the optimum percentage of nanostructure in foam formulation was defined. POLYM. COMPOS., 38:877–883, 2017. © 2015 Society of Plastics Engineers

A flame retardant containing biomass-based polydopamine for high-performance rigid polyurethane foam

“…31,32 In addition, the vibration modes of C-N and the unique stretching vibration of Si-O-Si are exhibited at 1300 cm À1 and 1100 cm À1 . 33 The ATH@PDA spectrum shows the vibration mode of C-N and CQN bonds derived from PDA at 1290 cm À1 and 1500 cm À1 , 34 and there is a weak peak at 1632 cm À1 caused by the benzene ring structure in PDA. 35 The elemental composition of the flame retardant surface was studied by X-ray photoelectron spectroscopy (XPS).…”

Reinforced magnetic polyurethane rigid (PUR) foam nanocomposites and investigation of thermal, mechanical, and sound absorption properties

“…As shown, in the Fe 3 O 4 spectrum (Figure 2(a)), the band at 584 cm −1 is attributed to Fe–O bending vibration mode. 14,15 In the FTIR spectrum of Fe 3 O 4 @SiO 2 @urea (Figure 2(b)), the absorption bands at 732 and 1060 cm −1 are due to the symmetrical and asymmetrical stretching vibrations of Si–O–Si. In addition, Si–O–Fe absorption appeared at 575 cm −1 .…”