Nonionic polyoxazoline surfactants based on renewable source: Synthesis, surface and bulk properties

Chloé Giardi (1) , Vincent Lapinte (1) , Clarence Charnay (1) , Jean Jacques Robin (1)

1 ICGM ICMMM - Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier

The synthesis of amphiphilic lipid-polyoxazoline based on copolymers (CO-POxn) with narrow distribution has been achieved via cationic ring-opening polymerization of 2-methyl-2-oxazoline (MOx). Lipid-macroinitiator (COTs) was obtained from commercial castor oil (CO), widely renewable agricultural resource. CO-POxn with various length segments were synthesized from a macroinitiator COTs in order to investigate the effect of the length of the hydrophilic segment on the solution behavior of the nonionic polymer surfactants CO-POxn. The results showed that the critical micelle concentration rised with the increase of POx content and inversely surface tension decreased. The average size of aggregates of these structures suggested the formation of vesicles or nonspherical micelles. Star-shaped morphology of CO-POxn in solid state has also been observed using environmental scanning electron microscopy (ESEM). Addionally energy dispersive X-ray (EDX) analysis demonstrated the presence of POx block in the concentric stripes of the texture.

Mots clés: Castor oil; lipopolymer; nonionic surfactant; self-organisation; polyoxazoline

Domaines: Polymères

Chloé Giardi, Vincent Lapinte, Clarence Charnay, Jean Jacques Robin. Nonionic polyoxazoline surfactants based on renewable source: Synthesis, surface and bulk properties. Reactive and Functional Polymers, 2009, 69, pp.643-649. ⟨10.1016/j.reactfunctpolym.2009.04.008⟩. ⟨hal-00379102⟩