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Guo X.,Chongqing University | Li X.,Chongqing University | Zheng Y.,Chongqing Fiber Inspection Bureau | Lai C.,Chongqing University | And 3 more authors.
Journal of Nanomaterials | Year: 2014

Three-dimensional porous nickel (3D-PN) film with large specific surface area (As) and high porosity has been successfully prepared by hydrogen bubble dynamic template (HBDT) method. This work presents the effects of PEG 10000 and 1,4-butynediol as new additive combination on surface morphology of the PN film. Meanwhile, the application of 3D-PN in Zn2+ adsorption was preliminarily investigated in the paper. The surface area is determined as large as 166.7 cm2/mg and the porosity is 0.762 when the concentration of PEG 10000 and 1,4-butynediol was 0.3 g/100 mL and 0.1 g/100 mL, respectively. The adsorption capacity (Qt and Q (%)) of PN for Zn2+ is observed to be 9.145 mg/g and 0.691 for Zn(NO3)2·6H 2O. The morphology and the microstructure, the product formation, the As the concentration of the metal ions were characterized by scanning electron microscopy (SEM), X-ray powder diffraction (XRD), electrochemical impedance spectroscopy (EIS), and atomic absorption spectrometry (AAS), respectively. © 2014 Xiaogang Guo et al.

Asad R.A.,Donghua University | Asad R.A.,University of Gezira | Yu W.,Donghua University | Zheng Y.,Chongqing Fiber Inspection Bureau | He Y.,Chongqing Fiber Inspection Bureau
Textile Research Journal | Year: 2015

This research contributes to the study of prickle sensation in terms of single fiber bending modulus and flexural rigidity, which are important factors for fabric-evoked prickle for garment tactile comfort. In this study, a novel technique was used to study the flexural buckling behavior of single fibers using an axial fiber-compression-bending analyzer (FICBA). The bending behavior and bending equivalent modulus of different single fibers were measured and analyzed. The bending properties of single fibers were quantified by calculating the equivalent bending modulus, and the flexural rigidity via measurement of the protruding length (l), diameter (d) of single fiber, and its critical force (Pcr), obtained from the peak point of the force–displacement curve. The experimental results indicate that ramie single fiber has the highest bending modulus, while cotton has the lowest bending modulus. However, hemp, jute, wool, flax, and cashmere fiber have bending modulus values lower than ramie but higher than cotton. On the other hand, the flexural rigidity of jute fiber is higher than that of wool followed by ramie, hemp, flax, cashmere, and cotton consecutively. Therefore, jute, wool, and ramie are stiffer than the other fibers, especially jute fiber. Thus, jute, wool, and ramie are uncomfortable single fibers because the fabric-evoked prickle, which is caused by short, coarse, and stiff fibers protruding from the fabric surface, generate sufficient force to evoke a low level of activity on a human nociceptors, but insufficient to penetrate the human skin so as to cause itchiness. © The Author(s) 2014 Reprints and permissions: sagepub.co.uk/journalsPermissions.nav.

Cong Y.-B.,Southwest University | Zheng Y.-H.,Chongqing Fiber Inspection Bureau | Zheng L.,Southwest University | Wu F.,Southwest University | Tan K.-J.,Southwest University
Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis | Year: 2015

For the property of persistent, bioaccumulation and genetic toxicity, perfluorooctanesulfonate (PFOS) is classified as a sort of persistent organic pollutants (POPs). It is significant to develop a novel assay for the determination of PFOS. In this work, we create a new colorimetric assay for PFOS in which the positively-charged gold nanoparticles (AuNPs) work as a nanoprobe. This method works on the aggregation of AuNPs induced by PFOS via electrostatic interaction. The stable monodisperse AuNPs coated by cysteamine present color of red wine and the addition of PFOS can make the monodispersed AuNPs aggregated resulting in the color change from wine red to reddish purple with a red-shift in ultraviolet-visible absorption spectrum. The experimental results show that AuNPs has a characteristic absorption peak (524 nm), as well as a wide absorption peak (650 nm) and the absorption signal intensity is proportional to the PFOS content in a range of 0.8~8.0 μmol·L-1. According to these, we developed a method based on ultraviolet-visible absorption and colorimetric to detect PFOS with the detection limit of 80 nmol·L-1. The scanning electron microscope (SEM) was investigated and the photos show that the stable AuNPs are made and the degree of AuNPs aggregation is related with PFOS concentration. The effect tests of coexisting substances in system show that common anions had less impact on the system and inorganic metal ions had some interference, which can be get rid of by cation exchange resin in real sample. This assay was applied to detect PFOS in tap water with a recovery range of 87.5%~118% and RSD≤4.4%. It is a novel application of AuNPs-based probe for PFOS detection. The proposed method has more advantages such as rapidity, low-cost and simplicity than conventional ones. In addition, it has the visual sensing function and the difference of color can be sensed by naked eyes directly, which produce ideas of real-time colorimetric strategies of nanoprobe application in environmental pollutant detection. ©, 2015, Science Press. All right reserved.

Zhang F.,Southwest University | Zheng Y.,Chongqing Fiber Inspection Bureau | Liang J.,Southwest University | Long S.,Chongqing Fiber Inspection Bureau | And 2 more authors.
Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy | Year: 2016

A simple, highly sensitive resonance light scattering (RLS) method for the detection of perfluorooctanoic acid (PFOA) has been developed based on the interaction with crystal violet (CV). It was found that PFOA can form complexes with CV in acid medium resulting in remarkable enhancement of the RLS intensity of the system. And the enhanced RLS intensities are in proportion to the concentration of PFOA in the range of 0.1-25.0 μmol/L (R2 = 0.9998), with a detection limit of 11.0 nmol/L (S/N = 3). In this work, the optimum reaction conditions and the interferences of foreign substances were investigated. The reaction mechanism between CV and PFOA was also studied by the absorption spectrum and scanning electron microscope (SEM). This method is successfully applied to the determination of PFOA in tap water and Jialing river water samples with RSD ≤ 4.04%. © 2016 Elsevier B.V. All rights reserved.

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