Ion transport and thermal properties of poly(ethylene oxide) - LiClO4 polymer electrolytes
Abstract The ion transport and thermal properties of polymer electrolytes formed by poly(ethylene oxide) (PEO) and lithium perchlorate are discussed. The phase diagram is examined over a LiC1O 4 concentration range of 0 – 34 mole %: regions of existence of amorphous and crystalline phases are defined. Conductivity and activation energies of the polymers have been determined through complex impedance analysis of cells with blocking electrodes. For the amorphous 8:I composition, which exhibits the highest ionic conductivity, the lithium transport number, measured at 70 – 150 °C using reversible Li electrodes, is approximately constant and equal to 0.30.
Abstract Aseptic loosening of implant is one of the main causes of Ti-based implant failure. In our previous work, a novel stable collagen/hyaluronic acid (Col/HA) multilayer modified titanium coatings (TCs) was developed by layer-by-layer (LBL) covalent immobilization technique, which showed enhanced biological properties compared with TCs that were physically absorbed with Col/HA multilayer in vitro. In this study, a rabbit model with femur condyle defect was employed to compare the osteointegration performance of them. Results indicated that Col/HA multilayer with favourable stability could better facilitate osteogenesis around implants and bone-implant contact. The Col/HA multilayer covalent-immobilized TC may reduce aseptic loosening of implant.