Porous Electroactive and Biodegradable Polyurethane Membrane through Self‐Doping Organogel

Abstract

In order to improve the processability of conductive polyurethane (CPU) containing aniline oligomers, a new CPU containing aniline trimer (AT) and l-lysine (PUAT) are designed and synthesized. Further, the 3D porous PUAT membranes have been prepared by a simple gel cooperated with freeze-drying method. Chemical testings and conductive properties testify a self-doping model of PUAT based on the rich electronic l-lysine and electroaffinity AT moities. The self-doping behavior further endows the PUAT copolymers specific characteristics such as high electrical conductivity and the formation of the polaron lattice like-structure in good solvent dimethyl sulfoxide. The combination of organogel and freeze-drying could prevent the collapse of pore structure when the copolymers are molded as membranes. The synergistic effect of l-lysine and AT components has a strong influence on the dissolution, degradation, thermal stability, and mechanical properties of PUAT. The excellent properties of PUAT would broad the application of conductive polymers in biomedicine field.

Design, synthesis, and evaluation of high‐performing anticorrosive polyurethane coatings with inbuilt redoxable oligomeric aniline segments

“…The presence of adsorbed moisture content or solvent is responsible for the degradation that occurs around 150–200°C. The cured Pure‐PU first degradation was observed at 301°C which is attributed to the degradation between IPDI (hard segment) and PTMEG‐2000 (soft segment), 39,82 and the second degradation was found at 426°C. But as DCTA/DCTAni content increased thermal stability varied by varying percentages of DCTA/DCTAni.…”

“…All the results are presented in Figure 11 and TGA data are collected in Table 5. The presence of adsorbed moisture content or solvent is responsible for the degradation that occurs around 150-200 C. The cured Pure-PU first degradation was observed at 301 C which is attributed to the degradation between IPDI (hard segment) and PTMEG-2000 (soft segment), 39,82…”

Linear and star-shaped π-conjugated oligoanilines: a review on molecular design in syntheses and properties

“…111 Another biobased dopant, L-lysine (basic amino acid) has been employed as chain-spacer and self-dopant in conductive polyurethanes. 112 The incorporation of self-doped oligoanilinecovalently attached protonic acid moiety to the oligoaniline structurehas resulted in an incredible electrochemical property. 47 The carboxylic acid-capped oligoaniline shows reversible electrochromic properties, even at alkaline states, owing to the selfdoping effect of the carboxylic acid end-groups.…”

“…111 Another biobased dopant, l -lysine (basic amino acid) has been employed as chain-spacer and self-dopant in conductive polyurethanes. 112…”

“…232 Amine-capped trianiline, as a hard segment in conductive biodegradable l -lysine-based polyurethane, presents a synergic effect with lysine, and enhances the final electrochemical and thermomechanical properties of 3D porous polyurethane. 112 Conductive polymer 3D-ink based on polycaprolactone and block copolymer of TANI-PCL-TANI has enhanced the surface hydrophilicity and fibronectin absorption for tissue engineering application – possibly cartilage repair. A fully interconnected conductive biodegradable PCL scaffold of macropores has been prepared via direct-ink writing in 3D printing.…”