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Your search keyword '"Lin, Zhaoyun"' showing total 11 results
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11 results on '"Lin, Zhaoyun"'

9. High-Strength Regenerated Cellulose Fiber Reinforced with Cellulose Nanofibril and Nanosilica

Author

Jiachuan Chen, Ming He, Yu Xue, Lin Zhaoyun, Yang Guihua, and Qi Letian

Subjects
Materials science, Shear thinning, General Chemical Engineering, Pulp (paper), Regenerated cellulose, dissolving pulp, cellulose nanofibril, engineering.material, Article, Chemistry, chemistry.chemical_compound, Viscosity, nano silicon dioxide, chemistry, high strength, Ultimate tensile strength, engineering, General Materials Science, Fiber, Cellulose, Composite material, Dissolving pulp, QD1-999
Abstract

In this study, a novel type of high-strength regenerated cellulose composite fiber reinforced with cellulose nanofibrils (CNFs) and nanosilica (nano-SiO2) was prepared. Adding 1% CNF and 1% nano-SiO2 to pulp/AMIMCl improved the tensile strength of the composite cellulose by 47.46%. The surface of the regenerated fiber exhibited a scaly structure with pores, which could be reduced by adding CNF and nano-SiO2, resulting in the enhancement of physical strength of regenerated fibers. The cellulose/AMIMCl mixture with or without the addition of nanomaterials performed as shear thinning fluids, also known as “pseudoplastic” fluids. Increasing the temperature lowered the viscosity. The yield stress and viscosity sequences were as follows: RCF-CNF2 &gt, RCF-CNF2-SiO22 &gt, RCF-SiO22 &gt, RCF &gt, RCF-CNF1-SiO21. Under the same oscillation frequency, G’ and G” decreased with the increase of temperature, which indicated a reduction in viscoelasticity. A preferred cellulose/AMIMCl mixture was obtained with the addition of 1% CNF and 1% nano-SiO2, by which the viscosity and shear stress of the adhesive were significantly reduced at 80 °C.

Published
2021

11. Effect of Humidity on the Sensitivity of an Ion-Doped TiO2 Nanotube-Based Gas Sensor to H2S and Its Mechanism via Density Functional Theory.

Author

Tong, Xin, Zhang, Xuejin, Wang, Hong, Lin, Zhaoyun, Xi, Hongxia, and Li, Jing

Subjects
GAS detectors, DENSITY functional theory, HUMIDITY
Abstract

We analyzed the effects of humidity on the H2S sensing ability of the undoped, Zn-doped, and Fe-doped TiO2 nanotube (TiNT)-based gas sensors. The 0.1 M Zn-doped TiNT-based gas sensor had more stable responses to 50 ppm H2S at 300°C compared to the undoped TiNT when the relative humidity (RH) ranged from 3 to 85%RH. For the 0.1 M Fe-doped TiNT sensor, the response reached the highest value (34.19-50 ppm H2S) at 70%RH. The Fe-doped TiNT sensors maintained relatively high responses when the relative humidity was below 60%RH. To determine the relationship between the sensing mechanism and TiO2 band structures and to determine the effect of water on the sensing mechanism, the systematic density functional theory (DFT) calculations for adsorption modes were performed. We found that metal ion doping was effective in improving the performance of H2S TiNT film-based gas sensors under different relative humidities. We also demonstrated the value of metal-doped TiNT gas sensors in practical environments. [ABSTRACT FROM AUTHOR]

Published
2022
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