Characterization of PU Nanofiber Web Treated with Non-oxidized Graphene and Silver Nanowire

Autor: Woojin Kim, Ji Soo Choi, Gilsoo Cho, Eugene Lee
Rok vydání: 2020
Předmět:
Zdroj: Fibers and Polymers. 21:978-983
ISSN: 1875-0052
1229-9197
Popis: The purpose of this study was to investigate the applicability of polyurethane nanofiber webs as smart textiles by evaluating electrical properties, surface properties, chemical properties, and thermal properties after imparting electrical conductivity by treating non-oxidized graphene/silver nanowire. For this purpose, three specimens were prepared by mixing non-oxidized graphene and silver nanowire at ratios of 3:1, 2:1, and 3:2, in order to impart conductivity to the polyurethane nanofiber web. The prepared specimens were named G/Ag31, G/Ag21 and G/Ag32 according to the ratio. The linear resistance and the surface resistance of each specimen was measured to estimate electrical properties of each specimen. The surface characteristics of the specimens were observed by FE-SEM photographs. HR-XRD analysis and Raman analysis were performed in order to determine whether the non-oxidized graphene and silver nanowires were properly processed in the fabricated specimens respectively. DSC and TGA analysis were also performed to investigate the thermal properties. As the results, the higher ratio of silver nanowires coated on the specimen, the lower the electrical resistance value. In the surface characteristics analysis, it was confirmed that the density of the silver nanowire was higher than that of the specimen having the higher silver nanowire ratio. In HR-XRD analysis, it was confirmed that non-oxidized graphene and silver nanowire existed in all specimens. In Raman analysis, it was confirmed that the intensity of 2D-peak was lower in specimens with high silver nanowire ratio. However, the difference in intensity between G/Ag21 and G/Ag32 was relatively small. In thermal analysis, it was found that the thermal stability of the specimen was higher than that of the untreated polyurethane nanofiber web because the thermogravimetric after 600 oC of all the specimens was larger than the untreated specimen. Therefore, in this study, it was confirmed that G/Ag32 specimen is best suited as a smart textile and it is confirmed that it can be applied as a textile sensor in the future.
Databáze: OpenAIRE
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