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Table of Content

    30 November 2013, Volume 47 Issue 6 Previous Issue    Next Issue
    Preparation and Properties of Random Carboxylated Butadiene Nitrile Rubber Modified Epoxy Resins
    CHANG Xia;NIE Xiao-an;WANG Yi-gang;CHEN Jie;LI Ke
    2013, 47 (6):  1-5.  doi: 10.3969/j.issn.1673-5854.2013.06.001
    Abstract ( 874 )   PDF (1098KB) ( 788 )   Save
    The preparation of epoxy resin modified by random carboxylated butadiene nitrile rubber and the properties of its cured products were studied in this paper. By infrared spectrum and chemical analysis, the effects of catalyst dosage, reaction temperature and reaction time on the properties of modified epoxy resin were discussed. Through the analysis of the mechanical properties of the cured products, the modified epoxy resin and its application were evaluated. The results showed that the modified product of epoxy value 0.40 and viscosity 90-95 Pa·s were obtained under conditions of mass proportion of epoxy resin:RCBN:catalyst 100:15:0.3, reaction temperature 120 ℃ and reaction time 3 h. The shear strength and elongation at break of the cured products of modified epoxy resin modified amine 411 were 18.41 MPa and 4.41%, respectively. The random carboxylated butadiene nitrile rubber had obvious toughening effect on epoxy resin.
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    Application and Production of Rosin Products in Tin Solder in China
    LIN Ke-zhong
    2013, 47 (6):  6-8.  doi: 10.3969/j.issn.1673-5854.2013.06.002
    Abstract ( 731 )   PDF (844KB) ( 819 )   Save
    This paper reviews application and production of the rosin products used in tin solder. The types and quality of rosin products in tin solder are discussed. The difference of products quality between China and foreign country is found. The improvement target of products quality is proposed.
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    Advences in Bioelectrochemistry of Bilirubin Oxidase
    ZHAO Min;LIU Zu-yan;ZHANG Xi;ZHAO Dan
    2013, 47 (6):  9-15.  doi: 10.3969/j.issn.1673-5854.2013.06.003
    Abstract ( 796 )   PDF (1885KB) ( 850 )   Save
    The paper made a summary of bilirubin oxidase in several aspects, i.e. the structural properties, the sources, mechanism of bioelectrocatalytic reaction (the redox potential of the copper ions active center, and mediators involved in electron transportation), the material of modified electrode, immobilization technology and the applications in bio-fuel cells. The paper illustrated the source and structure of bilirubin oxidase, bioelectrocatalysis, bilirubin oxidase fuel cells and application of bilirubin oxidase in electrochemistry.
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    Research Progress on Biomass Liquefaction and Refining Technology
    WANG Jin-biao;JIANG Jian-chun;XU Jun-ming;SI Zhan;HE Xiao-liang
    2013, 47 (6):  16-20.  doi: 10.3969/j.issn.1673-5854.2013.06.004
    Abstract ( 778 )   PDF (1389KB) ( 832 )   Save
    The domestic and abroad research progress on biomass thermo-chemical conversion methodology was reviewed. An overview about present state of refining techniques in bio-oil was given. The biomass liquefaction technologies, i.e., liquefaction in phenol, liquefaction by polyols, fischer-tropsch synthesis catalytic hydrogenation, catalytic cracking, catalytic esterification etc. were presented. Finally, the existing problems were summarized and the future development was prospected.
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    Research Progress on Upgrading of Bio-oil
    SI Zhan;JIANG Jian-chun;WANG Kui
    2013, 47 (6):  21-26.  doi: 10.3969/j.issn.1673-5854.2013.06.005
    Abstract ( 842 )   PDF (1575KB) ( 889 )   Save
    In this paper, the recent progress in upgrading process of bio-oil is reviewed. The advantages and shortcomings of several important processes such as catalytic hydrogenation, catalytic pyrolysis, catalytic esterification, steam reforming and emulsification are analyzed. The main problems and development tendency in the future are summarized.
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    Summaries of Influence Factors of Biomass Liquefaction under High Pressure
    HE Xiao-liang;JIANG Jian-chun;JIANG Xiao-xiang;FENG Jun-feng
    2013, 47 (6):  27-32.  doi: 10.3969/j.issn.1673-5854.2013.06.006
    Abstract ( 937 )   PDF (1385KB) ( 763 )   Save
    The factors influencing biomass liquefaction in high pressure, such as biomass type, solvent, catalyst, reaction temperature, reaction pressure, residence time, reaction atmosphere, heating rate, extractive and reactor types, are summarized in this paper. The refining methods of liquefaction oil were introduced briefly.
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    Advances on Preparation of Furfural from Xylose Catalyzed by Metal Salt Catalysts
    HU Qing-song;CHEN Ming-qiang;WANG Jun;YANG Zhong-lian
    2013, 47 (6):  33-40.  doi: 10.3969/j.issn.1673-5854.2013.06.007
    Abstract ( 976 )   PDF (1698KB) ( 973 )   Save
    Recent research findings in preparation of furfural from xylose catalyzed by metal salt catalysts was reviewed. The furfural formation mechanism, catalytic efficiency of various metal salts and properties of various reaction mediums were introduced. Finally, the prospected research on furfural from xylose was provided.
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    Influence of Torrefaction Pretreatment on Biomass Gasification
    YU Wei-jin;YING Hao;WANG Yan-jie
    2013, 47 (6):  41-45.  doi: 10.3969/j.issn.1673-5854.2013.06.008
    Abstract ( 797 )   PDF (1161KB) ( 824 )   Save
    This paper briefly describes the physical and chemical characteristics of the biomass. The existing feedstock pretreatment method on biomass gasification, including on the research situation of biomass torrefaction and the influence of torrefaction pretreatment on biomass gasification is introduced. Many research results show that torrefaction can significantly improve the biomass powder grinding performance, effectively increase the density and bulk density, and reduce the biomass O/C ratio. Finally, the paper made an outlook on the application of torrefaction pretreatment on biomass gasification.
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    Research Progress on Extracting Diosgenin from Yellow Ginger by Biological Technology
    LI Wen-jun;WANG Cheng-zhang
    2013, 47 (6):  46-52.  doi: 10.3969/j.issn.1673-5854.2013.06.009
    Abstract ( 668 )   PDF (2059KB) ( 702 )   Save
    The paper introduced the application of biological technology in the screening and breeding yellow ginger varieties with the high content of diosgenin and the extraction process. The paper compared the effect of different extraction methods on the yield of diosgenin and analyzed the main factors which influence the yield with the biological methods. Enzyme hydrolysis has obvious advantages in extracting diosgenin from yellow ginger in the yield and environmental protection compared with the traditional acid hydrolysis. Therefore, the study proposes new thoughts of development and evaluation method of diosgenin from yellow ginger using biological technology comprehensively. It has practical guidance to promote the industrialization of diosgenin.
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