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Ye Y.,South China University of Technology | Xu Y.,Dongguan University of Technology | Liu Y.,Dongguan Cleaner Production Center | Tu W.,South China University of Technology | Liao J.,Dongguan University of Technology
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | Year: 2013

Surface metallized polymers were widely used in many fields due to their excellent properties. Since the adhesion of metal film to the base polymer is usually poor, their practical applications was limited. In order to solve this problem, several surface modification techniques were employed to modify the surface properties of polymer. The reason of adhesion weakness was analyzed. The progress of polymer surface modification techniques, such as ion implantation, plasma treatment, ion beam irradiation, chemistry, photo-chemistry and excimer laser etching was reviewed. The modification effects and mechanisms of these techniques were also compared. At last, the direction and problems of industrial application were prospected on the basis of current research status. Source

Zhong S.,Dongguan University of Technology | Zhong S.,Dongguan Cleaner Production Center | Mo J.,Wuyi University | Li Y.,Dongguan University of Technology | Liu Y.,Dongguan University of Technology
Chinese Journal of Environmental Engineering | Year: 2016

2, 4-dichlorophenol, 2, 4, 6-trichlorophenol, and pentachlorophenol are typical representatives of chlorophenols. As chlorophenols have caused great harm to human health and the environment, they are classified as environmental priority pollutants in many countries. The adsorption of these chlorophenols onto powdered activated carbon (PAC) was studied, with a focus on the effects of PAC dosage, pH, and water quality on adsorption performance. The results indicated that more than 80% of the chlorophenols could be adsorbed by PAC, which follows the Freundlich and Langmuir adsorption isotherms. Particularly, chlorophenols in the molecular state were adsorbed more easily by PAC than those in the ionized state. © 2016, Science Press. All right reserved. Source

Xu Y.,Dongguan University of Technology | Xu Y.,Dongguan Cleaner Production Center | Liao J.,Dongguan Cleaner Production Center | Cai Q.,South China University of Technology | And 2 more authors.
Advanced Materials Research | Year: 2013

The SiO2 coated Al thin films deposited on glass substrate for solar front reflectors were designed using Essential Macleod Program (EMP) and successfully fabricated by magnetron sputtering. The obtained thin films showed high reflectivity (up to 89.51%) under the light wavelength ranged from 250 to 2500 nm, which was identical with calculated results. Moreover, the thin films showed high anti-corrosion properties after the harsh abrasion tests. The high performance of the thin films was mainly attributed to the SiO2 layer, which served as a good protection without serious degradation of reflectivity, demonstrating the bright prospects for outdoor solar front reflectors. © (2013) Trans Tech Publications, Switzerland. Source

Yang S.,Dongguan University of Technology | Yang S.,Dongguan Cleaner Production Center | Liu Z.,Dongguan University of Technology | Liu Z.,Dongguan Cleaner Production Center | And 6 more authors.
Journal of Materials Science | Year: 2013

Compatibility property, as well as crystalline morphology, of NBR/PEO blends has been investigated by Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), X-ray diffraction (XRD), and polarized optical microscopy (POM) thoroughly. There is no apparent shift of nitrile or ether groups in the FTIR spectra of NBR/PEO blends. Based on the calculations from glass transition temperature, the maximum volume fraction of PEO dissolved in NBR phase is about 6.41 % in blend with 5 wt% PEO content (PEO-5), indicating a weak intermolecular interaction in the NBR/PEO blends. From the characteristic absorption bands in the FTIR spectra, XRD and POM graphs, the crystallinity ratio of NBR/PEO blends decreases as the NBR content increases, which is further proved by DSC measurement that the crystallinity ratio and crystal melting temperature of pure PEO are 82.6 %, 69.9 C, and that of PEO-5 are 16.9 %, 59.5 C. This illuminates that the weak intermolecular interaction will affect the crystallinity ratio and crystal melting temperature of the NBR/PEO blends. © 2013 Springer Science+Business Media New York. Source

Yang S.,Dongguan University of Technology | Yang S.,Dongguan Cleaner Production Center | Liu B.,South China University of Technology | Liu Z.,Dongguan University of Technology | And 3 more authors.
Polymer International | Year: 2016

A novel borate ester (BE)-grafted carboxylated acrylonitrile butadiene rubber (XNBR) was synthesized. From Fourier transform infrared, 1H NMR and elemental analyses, the borate ester was successfully grafted to XNBR, resulting in a more flexible XNBR chain as revealed by differential scanning calorimetry. The binding energies of boron, oxygen, lithium and chlorine atoms of XNBR-g-BE-LiClO4 are quite different from those of XNBR or LiClO4. Meanwhile, the wavenumbers of C-O-B-O-C, C=O and C-H vibrations of the benzene ring shift towards lower values and a new shoulder peak for - at about 2260cm-1 emerges. By integrating fitting peak areas of - groups and ClO4 -, the fractions of - group and ClO4 - bidentate bonding in XNBR-g-BE-LiClO4 are much higher than in NBR-LiClO4. Based on these experiments, a possible dissociation mechanism is proposed in which the boron atom of XNBR-g-BE receives electron pairs from ClO4 -, releasing partial positive charge of Li+ to bind with - group. © 2016 Society of Chemical Industry. Source

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