Electrically Conductive Poly(DL‐lactide)/Chitosan/Polypyrrole Complexes

Abstract

Summary: The fabrication of novel conductive poly(DL‐lactide)/chitosan/polypyrrole complex membranes is reported. Using poly(DL‐lactide)/chitosan blends as matrices and polypyrrole as a conductive component, several kinds of membranes with various compositions are prepared. A percolation threshold of polypyrrole as low as 1.8 wt.‐% is achieved for some membranes by controlling the chitosan proportion between 40 and 50 wt.‐%. SEM images exhibit that the membranes with a low percolation threshold show a two‐phase structure which consists of poly(DL‐lactide) and chitosan phases. Dielectric measurements indicate that there is limited miscibility between the poly(DL‐lactide) and chitosan but polypyrrole is nearly immiscible with the other two components. Based on the structural characteristics of the membranes, the polypyrrole particles are suggested to be localized at the interface between two phases.

Fabrication and properties of conductive conjugated polymers/silk fibroin composite fibers

“…Damage to a peripheral nerve often results in a nerve gap, followed by poor functional recovery. Slow cell growth in the injury also results in poor recuperation [1]. Thus, a candidate for biomaterial applications is expected to benefit for nerve regeneration and cell growth.…”

The role of polyaniline and plasticizer on the development of the electrical conductivity of PHB composites

“…absorb plasticizer and make hydrogen bonds between them and PHB. There are some conductor polymers like polypyrrole (PPY), 11–13 and polythiophene (PTH) 14 which are considered as promising conductor polymers of the future. There are some previously studies to examine the electrical properties of a mixture PHB/PANI/CB blend with different solvent like chloroform and trifluoroethanol for fibers manufactured by electrospinning.…”

Proliferation of chondrocytes on porous poly(dl-lactide)/chitosan scaffolds

“…Although blending chitosan with polylactides at a highly miscible level is difficult to achieve due to the fact that chitosan cannot be processed via a melt-processing technique [23], and there are no shared common solvents for both chitosan and polylactides, several efforts have nevertheless been devoted to such blending [24][25][26]. We have prepared a series of PDLLA/chitosan and PLLA/chitosan membranes using an improved solution-casting and solvent-extracting method [27,28]. The resultant membranes showed acceptably well-blended structures because there was no visual phase separation appearing on the surfaces or inside of the membranes.…”