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Your search keyword '"Yanmei Zheng"' showing total 8 results
Start Over Author "Yanmei Zheng" Publisher american chemical society
8 results on '"Yanmei Zheng"'

3. High-Flux and Robust Co3O4 Mesh for Efficient Oil/Water Separation in Harsh Environment

Author

Jiale Huang, Wei Zeng, Yanmei Zheng, Xinxi Fu, Daohua Sun, and Jing Yu

Subjects
Materials science, business.industry, Abrasion (mechanical), General Chemical Engineering, Separation (aeronautics), General Chemistry, Article, law.invention, lcsh:Chemistry, Volume (thermodynamics), lcsh:QD1-999, Superhydrophilicity, law, Calcination, Wetting, Underwater, Process engineering, business, Sandpaper
Abstract

Material with special wettability for oil/water separation has drawn more and more attention, since the oil spill accidents and industrial processing are growing in frequency and in volume. A superhydrophilic and underwater superoleophobic mesh was prepared by introducing Co3O4 on a stainless steel mesh, through a simple hydrothermal process and subsequent calcination. The as-prepared Co3O4 mesh can not only separate various oil/water mixtures with high efficiency and high flux, but also work effectively in harsh environment such as highly acidic, alkaline, and salty solutions. Moreover, the Co3O4 mesh can still retain good separation performance after 40 abrasion cycles with sandpaper. The outstanding anticorrosion and antiabrasion behaviors make the Co3O4 mesh promising for oil/water separation even in harsh environment.

Published
2019

4. Graphene/Copper Nanoparticles as Thermal Interface Materials.

Author

Pengju Sun, Bowen Liu, Ziyun You, Yanmei Zheng, and Zhaoshou Wang

Abstract

Recently, graphene was extensively applied in the fields of electronic and thermal management for its extraordinary thermal conductivity (TC). The graphene prepared by venturi-assisted supercritical CO2 (scCO2) exfoliation has lots of advantages such as high quality, few defects, and extremely high in-plane TC and is usually used as thermal interface material (TIM). However, it was difficult to meet the development of three-dimensional integration due to the thermal anisotropy. Herein, we successfully introduced copper nanoparticles into graphene sheets to prepare the graphene nanocopper (Gr/Cu) composites with highly aligned graphene nanoplatelet by a vacuum filtration method. The unique structure of copper nanoparticles can significantly weaken the thermal anisotropy by providing a heat transfer channel for the graphene nanoplatelet. Experimental results revealed that through-plane thermal conductivity of Gr/Cu composites was increased by 2.05 times (5.22 W m-1 K-1) with 20 wt % copper nanoparticles doping and the thermal anisotropy decreased from 247 to 45, which means that there is great potential for TIMs. [ABSTRACT FROM AUTHOR]

Published
2022
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