Papers by Author: Dan Yu

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Authors: Ying Ya Yang, Dan Yu, Wei Wang
Abstract: Antibacterial polyester (PET) fibers with high electric conductivity were introduced by pretreatment-free electro-less silver plating in this study. The PET fibers were modified with the amide-siloxane film before silver coating, which was proved by the ATR-FTIR spectra, energy dispersive X-Ray (EDX) analysis and thermo-gravimetric (TG) analysis, respectively. Uniform and compact silver-coated film was found on the surface of PET fibers, evidenced by scanning electron microscopy (SEM). With 16% silver loading, the results indicted that silver-coated fibers have high electric conductivity (2.66Ω/cm) and exhibit strong antimicrobial activity against Escherichia coli (with 6.5 mm inhibition ring).
154
Authors: Peng Peng Xu, Dan Yu, Chao Wang, Ting Ting Wang, Wei Wang
Abstract: Modified by silane coupling agents APTES and MPTES, PAN fiber was provided with multi-chelating-group on it. Through the chelating effect, it can be directly used to eletroless silver plating without roughening, sensitization and activation. The molecule structure, morphology and thermal stability were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and therm-gravimetric (TG) analysis. In addition, electrical conductivity, and washing performance were also tested respectively. The results indicated that silver-coated PAN fiber based on APTES/MPTES modification had high conductivity with a compact and homogeneous silver layer, as well as good washing fastness performance.
464
Authors: Zhen Quan Dong, Dan Yu, Wei Wang
Abstract: Abstract: A novel oligomeric P–N synergistic flame retardant (FR) poly(phenyl O–(2–aminoethyl) phosphonamidoate) (PPAP) was synthesized and characterized by fourier transform infrared spectrometry (FT–IR) and 1H nuclear magnetic resonances (1H NMR). Application of PPAP on cotton fabric was studied, and the results showed that the best dosage of PPAP and coupling agent tetraethyl orthosilicate (TEOS) were 350 g/L and100 g/L respectively. Under these conditions, the treated cotton fabric was tested with 10.6 cm of char length. The results of thermogravimetric analyser (TGA) indicated that the fabrics treated with PPAP were more stable in high temperature compared with original fabrics. All the results implied PPAP can be used as a promising FR.
381
Authors: Ning Xu, Dan Yu, Wei Wang
Abstract: In this paper, jasmine microcapsule was synthesized by in-situ polymerization and was applied on cotton fabric with UV curing method. The jasmine microcapsule was verified by Fourier transform infrared spectroscopy. Size distribution was evaluated using particle size analysis. The finishing durability was studied by human olfactory sensations and an optimal finishing process was determined. The results suggest that UV curing will be promising for use in aroma finishing.
306
Authors: Tian Qi Hao, Yi Zhen Zhan, Bao Jiang Liu, Wei Wang, Dan Yu
Abstract: In this work, polyaniline (PANI)/cotton composite was prepared by in-situ oxidative polymerization and applied to remove Cr (VI) in solution. The as-prepared composite shows a high Cr (VI) removal rate (93.81%) at pH=2. Meanwhile, the adsorption kinetics follows the pseudo-second-order rate equation and the adsorption isotherm data fits well to the Langmuir isothermal model.
285
Authors: Dan Yu, Jie Yang, Chong Qian, Jia Jia Zhang, Wei Wang
Abstract: The electrochemistry property of the ferric-oxalate-gluconate complex was investigated using a gold electrode as working electrode. The peak currents of the ferric-oxalate-gluconate complex were found to increase linearly with square root of scanning rate displaying a quasi-reversible cyclic response of the redox process. The optimal conditions could be drawn from the cyclic voltammetry results and K/S values. That is 8.00 g/L ferric sulfate, 10.08 g/L oxalate, 17.92 g/L calcium gluconate and 45.00 g/L sodium hydroxide. Under this condition, we can not only get high reducing strength in the electroanalysis process, but also have cotton fabrics with good dyeability.
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