Bomin Electronics Co.

Meizhou, China

Bomin Electronics Co.

Meizhou, China
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Feng L.,Chongqing University | Zhang S.,Chongqing University | Zhang S.,Material Corrosion and Protection Key Laboratory of Sichuan Province | Yan S.,China University of Petroleum - Beijing | And 2 more authors.
International Journal of Electrochemical Science | Year: 2017

In order to explore the corrosion inhibition mechanism of 1-vinyl-3-hexylimidazolium iodide with different concentration for mild steel in 0.5M H2SO4 at 298K, experimental and theoretical studies were carried out. Not only weight loss but also electrochemical experiments reveal that 1-vinyl-3-hexylimidazolium iodide ([VHIM]I) has higher inhibition efficiency. And all experiments have good consistency. The inhibition efficiency was more than 96% comparing with the blank when the concentration was 5mM. It indicates that [VHIM]I adsorbed on the surface of invested metal by forming a film to protect metal. In addition, SEM observation and ATR-IR spectra was used to further confirmed the above. The Langmuir adsorption isotherm was the most proper adsorption model for the adsorption of [VHIM]I molecule on mild steel surface. Moreover, theoretical calculation and molecular dynamic (MD) simulation also manifest that [VHIM]I was absorbed mightily on the metal surface in a parallel mode. © 2017 The Authors.


Qiang Y.,Chongqing University | Qiang Y.,University of Sichuan | Zhang S.,Chongqing University | Zhang S.,Material Corrosion and Protection Key Laboratory of Sichuan Province | And 4 more authors.
Corrosion Science | Year: 2017

In this work, four allyl imidazolium-based ionic liquids (ILs) with various length of alkyl chains were developed for the corrosion inhibition of copper in 0.5. M sulfuric acid. Electrochemical techniques, morphological characterization, theoretical caculations were combined to investigate the inhibition performance and mechanism. The results show that corrosion circumstance of copper in sulfuric aqueous solution is efficiently inhibited by these ILs. Their favorable performance is ascribed to formation of ILs-adsorption films, which follow the Langmuir adsorption isotherm. Besides, the inhibition efficiencies of the investigated inhibitors increase with the augment of alkyl chain length attached to the imidazolium ring. © 2017 Elsevier Ltd.


Qiang Y.,Chongqing University | Qiang Y.,University of Sichuan | Zhang S.,Chongqing University | Guo L.,Tongren University | And 4 more authors.
Journal of Cleaner Production | Year: 2017

Sodium dodecyl benzene sulfonate (SDBS) was investigated as an eco-friendly inhibitor for zinc corrosion in 26% NH4Cl solution using corrosion experiments and theoretical calculations. Gravimetric and electrochemical results reveal that SDBS is an anodic inhibitor with excellent inhibition efficiency, which is further confirmed by field emission scanning electron microscope (FE-SEM) and atomic force microscopy (AFM) observation. The inhibitory effect diminishes with positive shift of potential, exhibiting a desirable characteristic for battery application. Despite the inhibition efficiencies decrease as increasing temperature from 298 to 328 K, the compound still shows favorable inhibitive ability at each temperature. In addition, the adsorption of SDBS on zinc surface obeys Langmuir adsorption model. Quantum chemical calculations and molecular dynamic simulations were further performed to correlate the adsorption mechanism with the structure of SDBS molecule. © 2017 Elsevier Ltd


He H.,Chongqing University | Chen J.,Chongqing University | Zhang S.,Chongqing University | Liao M.,Chongqing University | And 4 more authors.
Circuit World | Year: 2017

Purpose - This paper aims to propose a modified full-additive method (MFAM) to fabricate fine copper lines for high density interconnection (HDI) printed circuit boards (PCBs). In addition, the surface of the fine copper lines is treated with a brown oxidation process to obtain good adhesion between the copper and the dielectric resin. Design/methodology/approach - Fine copper lines fabricated by MFAM were observed to evaluate the undercut quality, in comparison to undercut quality of copper lines fabricated by the semi-additive method and the subtractive method. The effect of the thickness of the dry film on the quality of the copper plating was investigated to obtain the regular shape of fine lines. The fine copper lines treated with the brown oxidation process were also examined to generate a coarse surface microstructure to improve the adhesion between the copper and the dielectric resin. The cross section and surface of as-fabricated fine copper lines were characterized using an optical microscope, a scanning electron microscope and an atomic force microscope. Findings - MFAM has the potential to fabricate high-performance fine copper lines for HDI PCBs. Undercut of as-fabricated fine copper lines could be prevented to meet the design requirement of impedance. In addition, fine copper lines exhibit enough adhesive force to laminate with dielectric resin after the brown oxidation process. Originality/value - MFAM, with the advantages of high efficiency and being a facile process, is developed to fabricate high-quality fine copper lines for industrial HDI PCB manufacture. © 2017 Emerald Publishing Limited.


Qiang Y.,Chongqing University | Qiang Y.,University of Sichuan | Zhang S.,Chongqing University | Zhang S.,Material Corrosion and Protection Key Laboratory of Sichuan Province | And 3 more authors.
Corrosion Science | Year: 2017

In this work, three halogeno-indazole compounds were investigated for corrosion inhibition of copper in 3.0. wt% NaCl solution using potentiodynamic polarization measurement, electrochemical impedance spectroscopy, and X-ray diffraction (XRD) analysis. The electrochemical results revealed that all of these organics are mixed-type inhibitors with an inhibitive ability order: 4-CIA >. 4-BIA >. 4-FIA, which was further confirmed by observations with field emission scanning electron microscope (FE-SEM) and atomic force microscope (AFM). Their favourable performance is ascribed to the formation of inhibitor-adsorption films on copper. Furthermore, theoretical calculations showed the electronic structure of studied compounds and their optimized adsorption configurations on the copper surface. © 2017 Elsevier Ltd.


Zhang Q.,Chongqing University | Liu L.,Chongqing University | Liu Y.-C.,Chongqing University | Zhang C.,Chongqing University | And 4 more authors.
Gaodeng Xuexiao Huaxue Xuebao/Chemical Journal of Chinese Universities | Year: 2013

Polyvinyl alcohol/polyetherimide(PVA/PEI) nanofibers were fabricated by electrospinning. Subsequently, the nanofibers were functionalized with carbon disulfide to form polyvinyl alcohol/dithiocarbamates(PVA/DTC) nanofibers with higher adsorption capacity for heavy metal ions. The adsorption performance of PVA/DTC nanofibers for lead as well as the crosslinking and functionalization reaction PVA/PEI were investigated. The experimental data show that the fibers have diameters in hundreds nanometers and good appea-rance. The microstructure of nanofiber almost kept unchanged after crosslinking process and functionalization. The PVA/DTC nanofibers with good regeneration power possess much rapid adsorption and higher adsorption capacity. It is potential adsorption material for efficently removal heavy metal ions from waste water.


Luo L.,Chongqing University | Zhang S.,Chongqing University | Qiang Y.,Chongqing University | Qiang Y.,University of Sichuan | And 4 more authors.
International Journal of Electrochemical Science | Year: 2016

In this paper, the anti-corrosive effect of an ionic liquid named 1-allyl-3-butylimidazalium bromine for X65 steel in 0.5 M H2SO4 has been systematically studied via various electrochemical techniques, containing weight loss experiments, electrochemical tests, scanning electron microscope (SEM), theoretical calculations. The results obtained from weight loss experiments and electrochemical tests displayed that [ABlm]Br served as a mixed-type inhibitor primarily controlling cathode corrosion process and the anti-corrosive efficiency (up to 90.38% at 10 mM) improved with the increase of the concentration. Besides, it was found that the adsorption of the organic molecules on X65 steel substrate followed the Langmuir adsorption isotherm and surface topography of X65 steel was characterized using Scanning electron microscopy (SEM). In addition, theoretical calculations suggested that investigated inhibitor was flat-lying adsorbed on the X65 steel surface. © 2016 The Authors.


Tong L.,Chongqing University | Chen J.,Chongqing University | Yuan Y.,Chongqing University | Cui Z.,Chongqing University | And 6 more authors.
Journal of Applied Polymer Science | Year: 2015

A novel Pb(II) ion-imprinted chelating nanofibers (nIIP), synthesized by combining electrospinning with surface ion imprinting technique, was reported in this study. nIIP was characterized with Fourier transmission infrared spectrometry and scanning electron microscopy, respectively. The performance of nIIP for Pb(II) sorption was conducted through a batch adsorption experiments. Experimental data showed that adsorption capacity of nIIP was much higher than that of non-ion imprinted chelating acrylic microfibers (mNIP) derived from commercial available acrylic microfibers, and adsorption behaviors agreed well with pseudo-second-order kinetic and Langmuir isotherm model. The values of Gibbs free energy change derived from experimental data suggested that the adsorption Pb(II) on nIIP is spontaneous and favorable at high temperature. In addition, nIIP had the highest selectivity among three tested fibrous adsorbents for Pb(II) from binary metal solution, the selectivity coefficients for Pb(II) from binary metal solution of Pb(II)/Cu(II), Pb(II)/Ni(II), and Pb(II)/Cd(II) onto nIIP were 47, 101, and 162, respectively. Besides, a forty adsorption/desorption cycles revealed that nIIP was a promising recyclable adsorbent. In conclusion, the novel nIIP is a highly effective adsorbent for enrichment and separation of Pb(II) in the presence of competitive ions in aqueous solution, and it is potential to be applied for recovering metals from heavy metal polluted industrial wastewater such as Pb(II)/Cd(II), Pb(II)/Ni(II), and Pb(II)/Cu(II) polluted wastewater. © 2014 Wiley Periodicals, Inc.

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