Wood and cellulose derivatives, in both fibrous and water-soluble macromolecular form, are emerging as outstanding candidates for organic electronics applications due to their large-scale availability, low cost, and easy processability. Paper and wood fibre-based derivatives are considered to be materials of choice as supports for communication world-wide. The interest in producing inexpensive ...

Chitin, chitosan and quaternary chitosan films were prepared, and the mechanical properties and the antibacterial activities of chitosan and quaternary chitosan films were evaluated. The tensile strength of chitin films was 30-40% lower than that of chitosan films, but the crystallinity of the former was much higher than those of the latter. A detailed analysis of the crystallinity and orientat...

For the purpose of obtaining high bone forming efficacy, development of chitosan was attempted as a tool useful as a scaffolding device. Porous chitosan matrices, chitosan-poly(L-lactide) (PLLA) composite matrices and chitosan coated on PLLA matrices were dealt with in this research. Porous chitosan matrix was fabricated by freeze-drying and cross-linking aqueous chitosan solution. Porous chito...

In order to characterize stable composites that will contribute industrial applications, polypyrrole (PPy)/huntite were prepared by the physical method. Polypyrrole produced at various huntite concentrations (10, 20, 30, 40 wt.%). Polypyrrole/huntite was characterized Fourier transform infrared spectroscopy (FTIR), Thermal Gravimetric Analyses (TGA), Differential (DTA), Scanning electron micros...

The ion-mediated conduction and versatility of device fabrication of conducting polymers provide a route to the study of neural signaling. Patterned junctions of conducting polypyrrole have been electropolymerized on commercially available microelectrode arrays, with typical dimensions 200 mum between electrodes, each electrode being 30 mum in diameter. Tetrabutylammonium perchlorate or sodium ...

Microelectrodes have been used for over 30 years of glucose biosensor history. Two different types of glucose biosensors were developed using 176μm and 25μm diameter Pt wire cylindrical microelectrodes. The 176 μm Pt wire type microelectrodes were modified with non-conductive polymers and glucose oxidase enzyme. The lifetime of biosensors was over 50 days and had negligible response to interfer...

electrode has been investigated as the electrode substrate for deposition of a thin membrane ion gating polymer called polypyrrole (PPy). The PPy membrane was successfully deposited and its surface morphology studied using scanning electron microscopy. Given the properties of the bucky gel electrode and its ability to conduct ions, this work establishes the first step towards a semi-solid ion-g...

The development of highly flexible fibre batteries based on conducting polymers is described. The performance of cells with polypyrrole–hexafluorophosphate (PPy/PF6) and polypyrrole–polystyrenesulfonate (PPy/PSS) is evaluated. Based on the results, fibre batteries consisting of a PPy/PF6 cathode and a PPy/PSS anode are fabricated and tested in an electrolyte of 1M LiPF6 in a mixture of ethylene...

BACKGROUND Chitosan and its derivates are widely used for biomedical application due to antioxidative, anti-inflammatory, antimicrobial and tissue repair induced properties. Chitosan-based materials also used as a haemostatic agent but influence of different molecular weight and concentration of chitosan on biological response of blood cells is still not clear. The aim of this research was to e...

This work includes the exploitation of laboratory-assembled SPR technique for application gas sensors at room temperature. The refractive index change interface ZnO/polypyrrole with adsorption gases (NH3) is basis sensor. theoretical simulations were done to find out optimum thickness ZnO and polypyrrole composite films sharp reflectance values. Theoretical curves obtained by changing value gol...