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Gao H.,Institute of Chemical Industry of Forestry Products | Gao H.,Key Laboratory of Biomass Energy and Material | Gao H.,National Engineering Laboratory for Biomass Chemical Utilization | Gao H.,Key and Laboratory on Forest Chemical Engineering | And 10 more authors.
Tetrahedron | Year: 2013

A series of triarylamines based on dehydroabietic acid methyl ester moieties (6a-h) were synthesized for possible application as hole transporting materials for organic electroluminescent devices. The target compounds were characterized by elemental analysis, FT-IR, NMR, and mass spectrometry. Their optical, electrochemical, and thermal properties were investigated using UV-vis, PL spectroscopy, cyclic voltammetry (CV), thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC), respectively. CV measurements show that the compounds present suitable HOMO values (in a range of -4.63 to -5.11 eV) for hole injection, which is confirmed by theoretical calculations. All compounds were thermally stable. Organic light-emitting diode devices having 6f, 6g, and 6h as a hole transporting layer showed better performance of maximum brightness, turn-on voltage, and maximum luminous efficiency than a comparable device NPB. These compounds could be excellent candidates for applications in OLED devices. © 2013 Published by Elsevier Ltd. Source


Xu J.,Institute of Chemical Industry of Forestry Products | Xu J.,Key Laboratory of Biomass Energy and Material | Xu J.,National Engineering Laboratory for Biomass Chemical Utilization | Xu J.,Key and Laboratory on Forest Chemical Engineering | And 8 more authors.
Renewable and Sustainable Energy Reviews | Year: 2016

The increasing demand for transportation fuels, coupled with the depletion of petroleum resources and growing environmental concerns necessitates the development of efficient conversion technologies for the production of biofuels. Thermochemical approaches hold great promise for converting biomass into liquid fuels in one step using heat and catalysis. Several thermochemical processes are employed in the production of liquid biofuels depending on the target product properties: 1) direct thermal conversion; 2) catalytic cracking; 3) hydrodeoxygenation of plant oils and animal fats. Since enormous quantities of liquid fuels are consumed by transport vehicles, converting biomass into drop-in liquid fuels may reduce the dependence of the fuel market on petroleum-based fuel products. In this review, we summarize recent progress in technologies for large-scale direct thermochemical production of drop-in biofuels. We focus on the technical aspects critical to commercialization of the technologies for production of drop-in fuels from triglycerides, including cracking catalysts, catalytic cracking mechanisms, catalytic reactors, and biofuel properties. We also discuss future prospects for direct thermochemical conversion in biorefineries for the production of high grade biofuels. © 2016 Elsevier Ltd. All rights reserved. Source


Xie Z.,Key and Laboratory on Forest Chemical Engineering | Chu F.,Beijing Institute of Technology | Wang C.,Key and Laboratory on Forest Chemical Engineering | Wang C.,Beijing Institute of Technology | And 2 more authors.
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | Year: 2015

Poly(lactic acid)-graft-glycidyl methacrylate (PLA-g-GMA) prepared by melt blending was used to compatibilize poly(lactic acid)/wood flour (PLA/WF) composites. The structure of PLA-g-GMA was investigated by 1H-nuclear magnetic resonance (1H-NMR) and Fourier transform infrared spectroscopy (FT-IR), and the composites were characterized by mechanical testing, scanning electron microscope (SEM) and dynamic mechanical analysis (DMA). The results show that wit h increasing the PLA-g-GMA content, the tensile strength and flexural strength increase by 31% and 21% respectively compared to composites without PLA-g-GMA. Micromorphologic investigation reveals the interfacial adhesion between PLA and WF phase is improved by the introduction of PLA-g-GMA, and cavities and gaps on tensile fracture surface are diminished gradually. The results of DMA analysis reveal that the glass transition temperature of PLA phase in composites trend s to decrease with increasing the content of PLA-g-GMA. ©, 2015, Chengdu University of Science and Technology. All right reserved. Source


Yang X.-J.,Institute of Chemical Industry of Forestry Products | Yang X.-J.,Key Laboratory of Biomass Energy and Material | Yang X.-J.,National Engineering Laboratory for Biomass Chemical Utilization | Yang X.-J.,Key and Laboratory on Forest Chemical Engineering | And 13 more authors.
Environment, Energy and Sustainable Development - Proceedings of the 2013 International Conference on Frontier of Energy and Environment Engineering, ICFEEE 2013 | Year: 2014

Two different novel oil-based Vinyl Ester Resin (VER) monomers derived from Soybean Oil (SO) and Dimer Fatty Acids (DFA) were prepared via ring-opening polymerization and esterification modification. Moreover, their copolymers with different weight ratios were prepared by a thermal polymerization to develop novel bio-based materials, and then their mechanical, morphological and thermal properties were also investigated. The analysis results of FTIR demonstrated that these two novel VER monomers have been successfully synthesized. Mechanical tests showed that these prepared copolymers' flexural strength could reach 20.55 MPa. Micro-morphological investigation displayed glossy and smooth flexural fractured surfaces with brittle characteristics. Thermogravimetric Analysis (TGA) results demonstrated that the copolymers had excellent thermal stability, as all copolymers showed high main thermal initial decomposition temperature above 380°C. These copolymers can be used as ecofriendly materials for biomedical and other applications to replace the currently used petroleum-based polymers. © 2014 Taylor & Francis Group, London. Source


Yang X.J.,Institute of Chemical Industry of Forestry Products | Yang X.J.,Key Laboratory of Biomass Energy and Material | Yang X.J.,National Engineering Laboratory for Biomass Chemical Utilization | Yang X.J.,Key and Laboratory on Forest Chemical Engineering | And 14 more authors.
Advanced Materials Research | Year: 2013

Myrcene-based vinyl ester resin (VER) monomer was prepared via simple Diels-Alder reaction and ring-opening esterification. The molecular structure and UV curing behaviors of prepared VER monomer were characterized using FTIR analysis method. Moreover, the mechanical properties, thermal stability and hardness of its UV cured product were also investigated. FTIR analysis results demonstrated that the target myrcene-based VER monomer has been successfully synthesized. UV curing behaviors analysis showed that prepared myrcene-based VER monomer could reach ultimate cured level within 50 s. Physical properties study showed that the UV cured product has certain tensile, flexural, impact resistance properties and high hardness. TGA indicated the UV cured product had excellent thermal stability, as it showed high thermal initial decomposition temperature at 359.6°C. © (2013) Trans Tech Publications, Switzerland. Source

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