Morphology-Controlled Self-Assembly and Synthesis of Biopolyimide Particles from 4-Amino-<scp>l</scp>-phenylalanine
Thawinda Hirayama, Amit Kumar, Kenji Takada, Tatsuo Kaneko
Abstract
) of 432 °C at the maximum, and did not show any glass transition below the thermal decomposition temperature. The poly(amic acid) (PAA) precursors formed nanospheres upon reprecipitation over dimethylacetamide into water. The nanospheres were then added to solvents with different polarities and sonicated to induce deformation of the spherical forms into spiky balls, flakes, or rods. The PAA particle morphologies were retained in the PIs after the two-step imidization. Finally, the PI particles with self-assembling DKP moieties were formed, and their morphologies were fine-tuned using different mixed solvents.
Topics & Concepts
Thermal decompositionGlass transitionPolymer chemistryPhenylalanineMorphology (biology)Condensation polymerMaterials scienceChemical engineeringPolymerDimethylacetamideSelf-assemblyAmino acidChemistryOrganic chemistryNanotechnologySolventGeneticsEngineeringBiologyBiochemistrySynthesis and properties of polymersbiodegradable polymer synthesis and propertiesTribology and Wear Analysis