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.

Study on mechanical properties, thermal stability and crystallization behavior of PET/MMT nanocomposites

Abstract: PET/montmorillonite (MMT) nanocomposites were prepared via melt-blending and its nano-dispersion morphology was confirmed by X-ray diffraction and transmission electron microscopy. Its non-isothermal crystallization behavior was studied by DSC. It is found that the crystallization rate of PET nanocomposite was increased significantly. The Avrami equation parameters related to crystallization, such as n , Z c and t 1/2 , were calculated and analyzed. The thermal property and mechanical property of the composite were studied. When the MMT content was 1%, the composite has a desired comprehensive property. At this composition, the thermal degradation onset temperature and the thermal deformation temperature of PET were increased by 12 and 35 °C, respectively, and the tensile strength of the PET was increased by 25% with slightly increase of the notched impact strength.

An Improved Amplitude-frequency Formulation for Nonlinear Oscillators

Abstract: A brief introduction to amplitude-frequency formulae for nonlinear oscillators is given, an improved one is suggested.

Electrospun flexible nanofibrous membranes for oil/water separation

Abstract: Frequent oil spills and the ever-growing discharge of industrial oily wastewater seriously threaten ecosystems and human safety and result in huge economic loss, which has stimulated researchers to explore advanced oil/water separation materials. Electrospun nanofibrous membranes, featuring tunable wettability, good flexibility, high porosity, and outstanding pore connectivity, have received increasing attention. In this review, we aim to present the design and fabrication of electrospun flexible nanofibrous membranes with special wettability for oil/water separation. This review focuses on the discussion of various electrospun flexible membranes, assorted into three categories, including polymer-based membranes, ceramic-based membranes, and carbon-based membranes. In each type, the representative studies, fabrication techniques, and the synergistic effect among the membrane structure, selective wettability, and oil/water separation performance are discussed in detail. Finally, future perspectives and challenges in this promising field are highlighted.

3-Dimensional porous N-doped graphene foam as a non-precious catalyst for the oxygen reduction reaction

Abstract: Nitrogen-doped graphene materials have been demonstrated as promising alternative catalysts for the oxygen reduction reaction (ORR) in fuel cells and metal–air batteries due to their relatively high activity and good stability in alkaline solutions. However, they suffer from low catalytic activity in acid medium. Herein, we have developed an efficient ORR catalyst based on nitrogen doped porous graphene foams (PNGFs) using a hard templating approach. The obtained catalyst exhibits both remarkable ORR activity and long term stability in both alkaline and acidic solutions, and its ORR activity is even better than that of the Pt-based catalyst in alkaline medium. Our results demonstrate a new strategy to rationally design highly efficient graphene-based non-precious catalysts for electrochemical energy devices.