Donghua University

About: Donghua University is a education organization based out in Shanghai, China. It is known for research contribution in the topics: Fiber & Nanofiber. The organization has 21155 authors who have published 21841 publications receiving 393091 citations. The organization is also known as: Dōnghuá Dàxué & China Textile University.

A Dendritic Nickel Cobalt Sulfide Nanostructure for Alkaline Battery Electrodes

Abstract: A uniform dendritic NiCo 2 S 4 at NiCo 2 S 4 hierarchical nanostructure of width ≈100 nm is successfully designed and synthesized. From kinetic analysis of the electrochemical reactions, those electrodes function in rechargeable alkaline batteries (RABs). The dendritic structure exhibited by the electrodes has a high discharge-specific capacity of 4.43 mAh cm -2 at a high current density of 240 mA cm -2 with a good rate capability of 70.1% after increasing the current densities from 40 to 240 mA cm -2 . At low scan rate of 0.5 mV s -1 in cyclic voltammetry test, the semidiffusion controlled electrochemical reaction contributes ≈92% of the total capacity, this value decreases to ≈43% at a high scan rate of 20 mV s -1 . These results enable a detailed analysis of the reaction mechanism for RABs and suggest design concepts for new electrode materials.

Study of the preparation and properties of UV‐blocking fabrics of a PET/TiO2 nanocomposite prepared by in situ polycondensation

Abstract: Poly(ethylene phthalate) (PET)/nano-TiO2 composites prepared via in situ polymerization were spun into fiber by the melt-spinning process. The dispersion of nanosized rutile TiO2 in the PET was studied using transmission electron microscopy (TEM) and scanning probe microscopy (SPM) techniques. The mechanical properties and the properties of ultraviolet (UV) protection were investigated. The results showed that rutile TiO2 can be dispersed uniformly by the in situ polycondensation process. The mechanical properties of PET/TiO2 fiber were slightly affected by adding nano-TiO2. The UV-ray transmittance of PET/nano-TiO2 fabrics was below 10% in the UV-A band and below 1% in the UV-B band. And the ultraviolet protection factor (UPF) of PET/nano-TiO2 fabrics was greater than 50. All these PET/TiO2 nanocomposite fabrics exhibited excellent UV-blocking properties. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 1588–1593, 2006