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Guan G.,Fudan University | Qiu Z.,Yantai Tayho Advanced Materials Co. | Sun X.,Fudan University | Yang Z.,Fudan University | And 3 more authors.
Journal of Materials Chemistry | Year: 2012

Carbon nanotubes have for the first time been demonstrated as a novel and effective colorant for synthetic fibers such as poly(p-phenylene terephthalamide). Compared with the conventional carbon black, the nanotube colorant was found to be more uniformly dispersed in the polymer matrix with a better coloration effect and higher coloration stability. The nanotube colorant also enabled much improved electrical, mechanical, and thermal properties compared with the pure polymer and carbon black-colorized polymer fibers. © 2012 The Royal Society of Chemistry. Source

Wang W.-Q.,Yantai Tayho Advanced Materials Co. | Xu Q.-Y.,Yantai Tayho Advanced Materials Co. | Wei H.-F.,Yantai Tayho Advanced Materials Co.
Wool Textile Journal | Year: 2014

The application of spandex in the textile industry especially the wool spinning industry was briefly covered. Based on the production process of spandex, spandex technical modification on the current progress was introduced. For dry spinning spandex production, the influence of proportioning on properties of products was comparative analyzed, and in-depth discussion on the composition and structure of polyurethane was carried out. The main raw material included PTMEG, MDI and amines, while properties of spandex involved tensile strength, elongation strength, and breaking elongation. The results showed that; the higher the CR value (the molar ratio of MDI and PTMEG ) , the more hard segment ratio of raw materials, the higher the spandex stress, the higher the intensity, the greater the elongation at break. The influence of proportioning on other properties (such as heat resistance, dyeing, etc.) need to be further explored. Source

Xu C.,Ludong University | Qu R.,Ludong University | Li S.,Ludong University | Sun C.,Ludong University | And 7 more authors.
Journal of Polymers and the Environment | Year: 2016

A series of nanaoscale aramid-based adsorbents were prepared by the functionalization of poly (p-phenylene terephthalamide) (PPTA) with different content of ethylenediamine (EDA). Their structures were characterized by field emission scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis, and elemental analysis. Metal ions, including Hg2+, Pb2+, Ag+, Cu2+, Cd2+, and Ni2+ were chosen as the models to explore the binding behaviors of PPTA–ECH–EDA in aqueous medium. Results showed that PPTA–ECH–EDA exhibited higher adsorption capacity for Hg2+ due to their nanoscale structures. In particular, the adsorption rate was so high that equilibrium was achieved within 15 min for Hg2+. The adsorption of Hg2+ on PPTA–ECH–EDA followed the pseudo second-order model well. Langmuir and Freundlich models were employed to fit the isothermal adsorption, and the results revealed that Freundlich isotherm was a better model to predict the experimental data. The adsorption mechanism was revealed by X-ray photoelectron spectroscopy. It is preconceived that PPTA–ECH–EDA could be used as an effective adsorbent for fast removal of heavy ions from wastewater. © 2016 Springer Science+Business Media New York Source

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