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Ding H.,Institute of Chemical Industry of Forestry Products | Ding H.,Key Laboratory of Biomass Energy and Material | Ding H.,National Engineering Laboratory for Biomass Chemical Utilization China | Ding H.,Key and Open Laboratory on Forest Chemical Engineering | And 25 more authors.
Journal of Applied Polymer Science | Year: 2015

A novel phosphorus- and nitrogen-containing polyurethane quasi-prepolymer (PNPUQP) was synthesized and incorporated into phenolic foam (PF) in different ratios in order to improve the toughness. The structure of PNPUQP was confirmed by Fourier transform infrared (FTIR) spectroscopy and nuclear magnetic resonance (NMR). The effects of PNPUQP on the flame retardant properties, thermal stability and mechanical properties of modified PF were investigated. The results suggested that the addition of 3 wt % PNPUQP increased the toughness of PF and improved the flame retardancy. The investigation on the morphology of PF and modified PF by scanning electron microscope (SEM) certified the good toughness of the PNPUQP on PF. Additionally, the thermal properties of the foams were investigated by thermogravimetric analysis (TGA) under N2 atmosphere. © 2015 Wiley Periodicals, Inc. Source


Feng X.-Y.,Institute of Chemical Industry of Forestry Products | Feng X.-Y.,Key Laboratory of Biomass Energy and MaterialJiangsu Province | Feng X.-Y.,National Engineering Laboratory for Biomass Chemical Utilization China | Feng X.-Y.,Key and Open Laboratory on Forest Chemical Engineering | And 16 more authors.
Chinese Journal of Inorganic Chemistry | Year: 2015

Gold nanorods (GNR) with longitudinal surface plasma resonance (LSPR) absorption at 785 nm were synthesized by seed-mediated growth method and their surface was modified with polyethylene glycol (PEG) macromolecular (PEG-GNR). The photothermal conversion effect and cytotoxicity of PEG-GNR were investigated. Different bacteria, including gram-positive bacterium Staphylococcus aureus and Bacillus cereus, gram-negative bacterium Escherichia coli and Pseudomonas aeruginosa were used to analyze the influences of concentration of PEG-GNR and laser output power on the inhibition effects. The results show that the PEG-GNR has good antibacterial properties for both Gram positive and negative bacterium under the radiation of near-IR laser. The concentration of PEG-GNR and laser output power determined antibacterial effects of the PEG-GNR. The preliminary investigation on the antibacterial mechanism was explored by studying of bacteria apoptosis status with fluorescence microscope and transmission electronic microscope, suggesting that the effective absorption of the PEG-GNR by the cells is one of the key factors in the process of photothermal antibiosis. © 2015, Chinese Chemical Society.All Rights Reserved. Source

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