Polyurethane nanoparticles from a natural polyol via miniemulsion technique

Preparation of poly(urethane-urea) nanoparticles containing açaí oil by miniemulsion polymerization

“…In the same way, when PEG was used as co-monomer of castor oil a small increase was observed in the particle size, especially when PEG 1000 was used. Zanetti-Ramos et al observed an increase in the particle diameter from 246 nm to 261 nm when PEG 400 was used as co-monomer in the synthesis of PUU from castor oil and IPDI [9] . While polyols with low molar mass as PEG 400 and, especially, glycerol resulted in smaller particles with narrow size distributions, as shown in Figure 3, polyols with higher molar mass as PEG 1000 and castor oil led to the formation of broad particle size distributions, as also observed in SEM and TEM images of reaction A3 with PEG 1000 and castor oil as polyol in Figure 2.…”

“…In addition, the development of biocompatible poly(urethaneurea) (PUU) has drawn much attention due to their excellent physical properties, biocompatibility and biodegradability and the potential value has been discussed for a variety of pharmaceutical, medical, and cosmetic applications such as medium for controlled release [1][2][3][4][5][6] . PUU particles have been synthesized using several techniques such as suspension, miniemulsion and interfacial polymerization [7][8][9] . Miniemulsion is defined as dispersions of relatively stable oil droplets with a size range 50-500 nm, prepared by shearing a system containing oil, water, surfactant and costabilizer [10][11][12] .…”

Green polyurethane synthesis by emulsion technique: a magnetic composite for oil spill removal

“…Before the polymerization, the emulsion was prepared following the methodology described in the literature [14] . In a typical procedure, a solution containing 0.5 g of DBSA into 1 liter of distilled water was previously prepared, and employed as continuous phase.…”

Surfactant Effect in Miniemulsion Polymerization for Biodegradable Latexes

“…Recently, we synthesized biocompatible nanoparticles using a natural triol (castor oil) as a monomer and isophorone diisocyanate (IPDI) in aqueous medium using the miniemulsion polymerization technique [28,29]. The stabilization of the nanoparticles was achieved by adding nonionic surfactants (Tween 80 or Pluronic F68) and olive oil as a co-stabilizer.…”