Reversible Formation of Nanoparticles by Thermoresponsive Dehydroalanine Polymer: Poly(<i>N</i>-isobutyryldehydroalanine methyl ester)
作者:Yoshihiko Tezuka、Yoshitaka Bando、Hitoshi Tanaka
DOI:10.1246/cl.2002.184
日期:2002.2
Two kinds of dehydroalanine monomers, N-isobutyryl dehydroalanine (iBDHA) and its methyl ester (iBDHAM), were synthesized and their homopolymers were prepared by free radical polymerization. While poly(iBDHA) did not show any phase transition in water, poly(iBDHAM) exhibited the lower critical solution temperature (LCST) at 19 °C to form colloidal dispersion of nanoparticles with 60 nm diameter above the LCST. This nanoparticle formation was thermoreversible.
合成了两种脱氢丙氨酸单体N-异丁酰脱氢丙氨酸(iBDHA)及其甲酯(iBDHAM),并通过自由基聚合制备了它们的均聚物。虽然聚(iBDHA)在水中没有表现出任何相变,但聚(iBDHAM)在19°C表现出较低的临界溶液温度(LCST),形成高于LCST、直径为60 nm的纳米粒子的胶态分散体。这种纳米颗粒的形成是热可逆的。