Thermoplastic starch plasticized by an ionic liquid

A. Sankri (1) , A. Arhaliass (1) , Isabelle Dez (2) , Annie-Claude Gaumont (2) , Yves Grohens (1) , D. Lourdin (1) , Isabelle Pillin (1) , Agnès Rolland-Sabaté (3) , Eric Leroy (4)

1 LIMATB - Laboratoire d'Ingénierie des Matériaux de Bretagne
2 LCMT - Laboratoire de chimie moléculaire et thioorganique
3 inconnu
4 GEPEA - Laboratoire de génie des procédés - environnement - agroalimentaire

Thermoplastic starch (TPS) plasticized by 1-butyl-3-methylimidazolium chloride ([BMIM]CI) was obtained by melt processing. The resulting electrically conductive TPS samples were less hygroscopic than glycerol plasticized TPS samples. Despite this lower water uptake, [BMIM]CI seems to be intrinsically a more efficient plasticizer of starch. [BMIM]CI plasticized TPS samples show a much higher elongation at break in the rubbery state than the glycerol plasticized TPS samples. Their unusually low rubbery Young's modulus for thermoplastic starch (0.5 MPa) suggests a strong reduction of hydrogen bonds between the starch chains due to the presence of the ionic liquid. A detailed IR spectroscopy analysis supports this interpretation.

Mots clés: THERMOPLASTIC STARCH; INTERACTIONS; MECHANICAL PROPERTIES; PLASTICIZATION; ELECTRICAL CONDUCTIVITY; STRUCTURE MACROMOLECULAIRE

Mots clés: IONIC LIQUIDS; LIQUIDE IONIQUE; CAPACITE DE RETENTION D'EAU

Domaines: Chimie organique; Polymères

A. Sankri, A. Arhaliass, Isabelle Dez, Annie-Claude Gaumont, Yves Grohens, et al.. Thermoplastic starch plasticized by an ionic liquid. Carbohydrate Polymers, 2010, 82 (2), pp.256-263. ⟨10.1016/j.carbpol.2010.04.032⟩. ⟨hal-00879869⟩