Synthesis and characterization of an amphiphilic multi-blockpolyurethane based on oleic acid using diisocyanate method

Polyurethanes (PUs) are promising candidates for various areas. In this work, a renewable, greenand scalable dihydroxy acid (DHA) was synthesized from oleic acid and applied in the preparationof a diisocyante-endded prepolymer by the reaction with isophorone diisocyanate (IPDI). Then thesynthesized prepolymer was used for the fabrication of an amphiphilic multi-block polyurethane(AMBPU) by the reaction with polyethylene glycol (PEG) using one drop of dibutyl tin dilaurate(DBTL) as a catalyst. The formed AMBPU was characterized and the structure was approved byFT-IR and ۱H NMR analysis. The polymer could be self-assembled in toluene to form reversepolymer micelles with a particle size of ۱۳۴ nm. The morphologies of these nanoparticles wereinvestigated by field emission scanning electron microscopy (FE SEM), dynamic light scattering(DLS), ۱H NMR spectroscopy and water contact angle (WCA) measurement.The synthesizedamphiphilic polyurethane had the ability to form reverse micelles in organic medium. Thesemicelle-shaped structures have the ability to load the hydrophilic guest in its hydrophilic core.

کلیدواژه ها:

Polyurethane ، reverse micelles ، amphiphilic polymer nanoparticles