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J-FOR 2013年第6期3卷 39-47页

作者： Shen, Jing Fatehi, Pedram Ni, Yonghao Chemical Engineering Department Lakehead University 955 Oliver Road Thunder BayON Canada Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education Material Science and Engineering College Northeast Forestry University Harbin150040 China Limerick Pulp and Paper Centre and Department of Chemical Engineering University of New Brunswick FrederictonNB Canada

Production of dissolving pulp by means of the Kraft process has received much attention these days in Canada. In this process, wood chips are pretreated with steam before Kraft pulping. This steaming leads to dissolution of part of the lignocelluloses in the wood chips in the prehydrolysis liquor (PHL). The PHL contains 5%-8% lignocelluloses that can potentially be used to produce value-added chemicals, and methane has been commercially produced from PHL. However, the dilute nature of PHL may hinder its direct utilization in producing certain value-added chemicals. To accommodate lignocelluloses from PHL economically, they should be first isolated from the PHL. In this paper, various processes developed for isolating lignocelluloses from PHL and using them to produce value-added chemicals are reviewed. Acidification and solvent extraction can be used to extract lignin and hemicelluloses respectively from PHL. laboratory analysis of adsorption and flocculation processes showed promising results for isolating lignocelluloses from PHL, and their products could be used as modified fillers in board production, as fuel, or as raw material for producing bio-oil, for example. The main challenge in the production of acetic acid and furfural is the development of a viable separation process for lignocelluloses from PHL which can be integrated into the existing facilities of the Kraft process. © 2013, Pulp and Paper Technical Association of Canada. All rights reserved.

关键词： Lignocellulose

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Catalytic upgrading of wood-plastic composite fast pyrolysis vapors with USY/ HUSY catalysts

Catalytic upgrading of wood-plastic composite fast pyrolysis...

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2013 International Conference on materials for Renewable Energy and Environment, ICMREE 2013

作者： Sun, Jian-Ping Sui, Shu-Juan Zhang, Zhi-Jun Tan, Shun Wang, Qing-Wen Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education Northeast Forestry University Harbin China School of Municipal and Environmental Engineering Shenyang Jianzhu University Shenyang China

ISBN: (纸本)9781479933365

Ultra stable Y type(USY) zeolite and HUSY zeolite were applied to catalytic cracking of wood-plastic composite(WPC) fast pyrolysis vapors using analytical pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS). Compared with the results of non-catalytic pyrolysis, there was a dramatic increase in the concentration of olefins and aromatic compounds of the derived pyrolytic products. The catalysts significantly reduced aldehydes, acetic acid and ketones. In addition, levoglucosan was completely eliminated after catalysis. The results showed that both USY and HUSY zeolite exhibited high activity in the decarboxylation and decarbonylation of the pyrolytic products, and USY performed better than HUSY. © 2013 IEEE.

关键词： Zeolites

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The silane coupling agent treatment of basalt fibers reinforced wood-plastic composite

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Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica 2013年第SUPPL.期30卷 315-320页

作者： Wang, Weihong Lu, Guojun School of Materials Science and Engineering Key Laboratory of Bio-based Material Science and Technology of Ministry of Education Northeast Forestry University Harbin 150040 China

Basalt fibers (BFs) were surface-treated with γ-aminopropyltriethoxysilane (KH-550) coupling agent to improve the mechanical properties of wood fiber reinforced high density polyethylene (HDPE) composites. Basalt fibers were characterized by SEM and FT-IR. The effects of the basalt fiber content and apparent morphology on the mechanical properties of the hybrid composites were investigated in this paper. Results showed that BF coated with γ-aminopropyltriethoxysilane coupling agent contributed to an improvement in mechanical properties due to the increased interfacial compatibility between BF and HDPE. The tensile and impact properties increased obviously with 4 wt% treated basalt fibers.

关键词： High density polyethylenes

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Effect of preparation method on the flexural properties of WPC

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Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica 2013年第SUPPL.期30卷 311-314页

作者： Cao, Yan Wang, Weihong Wang, Haigang Wang, Qingwen Key Laboratory of Bio-based Material Science and Technology Ministry of Education Northeast Forestry University Harbin 150040 China Guizhou Minzu University College of Information Engineering Guiyang 550025 China

High density polyethylene composites (WPC) filled with 60% wood fibers (10~20, 20~40, 40~80, and 80~120 meshes) were prepared by extrusion, extrusion compound-hot pressing, extrusion compound-compression molding, and forming mat-compression molding. The flexural properties of these WPCs were investigated. The results show that preparation method has a significant effect on the flexural properties of WPC. Extrusion provides WPC the best flexural property and follow by the extrusion compound-hot pressing. While forming mat-compression molding gives the lowest bending strength and extrusion compound-compression molding gives the poorest elastic modulus. 20-40 mesh fiber is a good choice for preparing WPC.

关键词： Compression molding

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Application of hinokitiol potassium salt for wood preservative

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Journal of Environmental sciences (China) 2013年第S1期25卷 S32-S35页

作者： Hu, Junyi Shen, Yu Pang, Song Gao, Yun Xiao, Guoyong Li, Shujun Xu, Yingqian Center of Separation Technology School of Chemical Engineering University of Science and Technology Liaoning Anshan 114051 China Key Laboratory of Bio-based Material Science and Technology of Ministry of Education Northeast Forestry University Harbin 150040 China

The decay of wood and other cellulosic materials by fungi cause significant economic loss. The widely used chromated copper arsenate was prohibited for the environmental impact and safety of arsenic and chromium. It was found that natural product hinokitiol (HK) had fungicidal and insecticidal activities, and its toxicity was bearable for the environment. We described the practical synthesis of HK-K salt. According to the GB/T18261-2000 and LY/T1283-1998, wood preservative performance of HK-K salt was tested. The results showed that the best inhibitory concentration of HK-K salt was 50 mg/L, for which the prevention effectiveness on mold is better, the killed value is between 0 and 1, and the corrosion-resistant for wood-rotting fungi is grade A. © 2013 The Research Centre for Eco-Environmental sciences, Chinese Academy of sciences.

关键词： Salts

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Catalytic Upgrading of Wood-Plastic Composite Fast Pyrolysis Vapors with USY/HUSY Catalysts

Catalytic Upgrading of Wood-Plastic Composite Fast Pyrolysis...

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2013 International Conference on materials for Renewable Energy and Environment

作者： Jian-ping Sun Shu-juan Sui Zhi-jun Zhang Shun Tan Qing-wen Wang Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education Northeast Forestry University School of Municipal and Environmental Engineering Shenyang Jianzhu University

ISBN: (纸本)9781479933372

Ultra stable Y type(USY) zeolite and HUSY zeolite were applied to catalytic cracking of wood-plastic composite(WPC) fast pyrolysis vapors using analytical pyrolysis-gas chromatography/mass spectrometry(Py-GC/MS).Compared with the results of non-catalytic pyrolysis,there was a dramatic increase in the concentration of olefins and aromatic compounds of the derived pyrolytic *** catalysts significantly reduced aldehydes,acetic acid and *** addition,levoglucosan was completely eliminated after *** results showed that both USY and HUSY zeolite exhibited high activity in the decarboxylation and decarbonylation of the pyrolytic products,and USY performed better than HUSY.

关键词： Wood-Plastic Composite fast pyrolysis catalytic cracking Py-GC/MS USY/HUSY

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DETERMINATION OF MOISTURE DIFFUSION COEFFICIENT OF LARCH BOARD WITH FINITE DIFFERENCE METHOD

DETERMINATION OF MOISTURE DIFFUSION COEFFICIENT OF LARCH BOA...

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第十四次全国木材干燥学术研讨会

作者： Qiaofang Zhou Yingchun Cai Tengyun Tu Department of Wood Science and Engineering College of ForestrySouth China Agricultural University5 Key Laboratory of Bio-based Material Science and Technology of Ministry of Education Northeast Fores

This paper deals with the moisture diffusion coefficient of Dahurian Larch (Larix gmelinii Rupr.) by use of the Finite Difference Method (FDM).To obtain moisture distributions the dimensional boards of Dahurian Larch were dried, from which test samples were cut and sliced evenly into 9 pieces in different drying periods, so that moisture distributions at different locations and times across the thickness of Dahurian Larch were obtained with a weighing *** these experimental data, FDM was used to solve Fick's one-dimensional unsteady-state diffusion equation, and the moisture diffusion coefficient across the thickness at specified time was *** indicated that the moisture diffusion coefficient decreased from the surface to the center of the Dahurian Larch wood, and it decreased with decreasing moisture content at constant wood temperature;as the wood temperature increased, the moisture diffusion coefficient increased, and the effect of the wood temperature on the moisture diffusion coefficient was more significant than that of moisture *** diffusion coefficients were different for the two experiments due to differing diffusivity of the specimens.

关键词： Finite Difference Method Unsteady-state diffusion Moisture diffusion coefficient Dahurian Larch board

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International cultivation of talents for wood science and engineering specialty based on "ABC-KAQ model"

International cultivation of talents for wood science and en...

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2012 International Symposium on Information Technologies in Medicine and Education, ITME 2012

作者： Yuan, Yuan Guo, Minghui Key Laboratory of Bio-based Material Science and Technology Northeast Forestry University Harbin China

ISBN: (纸本)9781467321068

With the global economy developed rapidly, it is particularly urgent and important to speed up development of international cultivation of talents in the agriculture and forestry colleges, to meet the objective demand of talents in new era and enhance the core competitiveness of colleges and universities. This paper pointed out the main problems of Wood science and Engineering Specialty. based on the "ABC-KAQ model", the cultivation system of "practice-innovative" complex talent was put forward, in order to realize win-win goals of the social demand with the agriculture and forestry colleges. © 2012 IEEE.

关键词： Forestry

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Comparative study of plasticizing effect of corn starch using formamide and urea

Comparative study of plasticizing effect of corn starch usin...

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2012 International Conference on biobase material science and Engineering, BMSE 2012

作者： Yingfeng, Zuo Jiyou, Gu Haiyan, Tan Yanhua, Zhang Key Laboratory of Bio-based Material Science and Technology Ministry of Education Northeast Forestry University Harbin 150040 China

ISBN: (纸本)9781467323833

Formamide and urea were used as plasticizers for corn starch to prepare formamide plasticized-thermoplastic starch (FPTPS) and urea plasticized- thermoplastic starch (UPTPS), respectively. The properties of thermoplastic starch (TPS) were tested by scanning electron microscope (SEM), X-ray diffraction (XRD), differential scanning calorimetry (DSC), thermo gravimetric analysis (TGA) and mechanical testing machine. Scanning electron microscope result shows that both formamide and urea can make corn starch plasticized form uniform continuous phase, but plasticizing effect of formamide was better than that of urea. X-ray diffraction exhibits that the crystallization peaks of FPTPS were disappeared, and a reduction minish for UPTPS, the crystallinity of FPTPS was smaller than UPTPS. The gelatinization temperature of two kinds of thermoplastic starches was basically the same, but the gelatinization enthalpy of FPTPS was much less than UPTPS. Formamide was better plasticized than urea for corn starch, which made the TGA inflection temperature and residual quantity of FPTPS was lower than UPTPS. FPTPS tensile strength was lower than UPTPS, but the elongation at break was much bigger than UPTPS. © 2012 IEEE.

关键词： Urea

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Durability of wood-polymer composite prepared by in-situ polymerization of functional monomers

Durability of wood-polymer composite prepared by in-situ pol...

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2012 International Meeting on Opto-Electronics Engineering and materials Research, OEMR 2012

作者： Gong, Dingwang Liu, Zhenbo Huang, Huawei Zhang, Changqing Liang, Chen Key Laboratory of Bio-based Material Science and Technology of Ministry of Education Northeast Forestry University Harbin 150040 China

ISBN: (纸本)9783037854884

Fast-growing plant wood, Micheliamacclurel wood, was modified by formation of wood-polymer composite to improve its decay resistance. Two functional monomers, glycidyl methacrylate and ethylene glycol dimethacrylate, added with a few Azo-bis-isobutryonitrile as initiator, and maleic anhydride as catalyst, were first impregnated into wood cell lumen under a vacuum-pressure condition, and then in-situ polymerized into copolymers through a catalyst-thermal treatment. The decay resistances of untreated wood and wood-polymer composites were assessed by weight loss and compared by SEM observations. SEM and FTIR analysis indicated that the in-situ polymerized copolymers fully filled up wood cell lumen and also grafted onto wood cell walls, resulting in the blockage of passages for microorganisms and moisture to wood cell walls. Thus, the decay resistance of the wood-polymer composite against brown rot fungus and white rot fungus in terms of weight loss achieved 1.04%~1.33%, improved 95.10%~95.35% than those of untreated Micheliamacclurel wood;and also higher than that of boron-treated wood. The SEM observations presented the remarkable improvement of decay resistance of wood after such treatment, which effectively protected wood from degradation by fungi. © (2012) Trans Tech Publications, Switzerland.

关键词： Wood

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