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13 results on '"Shi, Meiwu"'

5. Resveratrol-Loaded Diacetate Fiber by Supercritical CO 2 Fluid Assisted Impregnation.

Author

Zhu, Weiwei, Long, Jiajie, and Shi, Meiwu

Subjects
CARBON dioxide, SUPERCRITICAL fluids, TIME pressure, FREE radicals, RESVERATROL, FIBERS
Abstract

(1) Background: Supercritical CO2 fluid (SCF-CO2)-assisted impregnation presents advantages on loading active drugs to polymer substrates, since it enables the realization of a drug-loaded polymer without any solvent residue. Besides, CO2 gas and drugs can be recycled and utilized again. Resveratrol-loaded diacetate fiber by SCF-CO2-assisted impregnation was done to give diacetate fiber biological activity function for enhancing its added value. (2) Methods: The effect of SCF-CO2 temperature, pressure and treatment time on loading ability (LA) of resveratrol onto diacetate fiber was explored by ultraviolet visible spectrophotometer. The variation of structure and property of diacetate fiber was analyzed by characterization instruments. (3) Results: LA had been increasing with SCF-CO2 treatment time, temperature and pressure when SCF-CO2 was above 70 °C, 12 MPa. The inhibiting rate of resveratrol to free radicals was affected positively by SCF-CO2. After resveratrol was impregnated by SCF-CO2 it appeared some small white granular substances on the surface of diacetate fiber. It had a good interaction between resveratrol and molecular chain of diacetate fiber. (4) Conclusions: Resveratrol was well-loaded onto the diacetate fiber by SCF-CO2 assisted impregnation. [ABSTRACT FROM AUTHOR]

Published
2022
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13. Electromagnetic Function Textiles

Author

Xiao, Hong, Shi, Meiwu, and Chen, Jianying

Subjects
Technology & Engineering / Materials Science
Abstract

This chapter is about the electromagnetic (EM) functional textiles. There are three parts including the EM properties of the textiles, the EM functional textile materials, and the application of the EM functional textiles. In the first part, we outline the textile materials including the fibers, yarns, and fabrics and their EM properties. Generally, textiles are poor in EM properties such as low conductivity and low dielectric and magnetic properties. In the second part, EM functional textiles are defined and the manufacture method is stated. The EM functional fibers and yarns and fabrics can be got by various methods; the EM properties can be improved to a high level. In the third part, several typical EM functional textiles are introduced. These textiles are antistatic textiles, EM shielding textiles, EM scattering textiles, and two-dimensional and three-dimensional frequency selective textiles. The principle, the processing methods, the properties of the static electro or EM shielding or EM scattering or frequency selection, and so on are described one by one in detail.

Published
2022

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