Table of Content

30 November 2013, Volume 47 Issue 6 Previous Issue    Next Issue

研究报告

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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 ( 890 )   PDF (1098KB) ( 892 )   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. Related Articles | Metrics

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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 ( 746 )   PDF (844KB) ( 921 )   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. Related Articles | Metrics

综述评论

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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 ( 825 )   PDF (1885KB) ( 957 )   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. Related Articles | Metrics

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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 ( 799 )   PDF (1389KB) ( 945 )   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. Related Articles | Metrics

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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 ( 859 )   PDF (1575KB) ( 992 )   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. Related Articles | Metrics

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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 ( 967 )   PDF (1385KB) ( 865 )   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. Related Articles | Metrics

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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 ( 1009 )   PDF (1698KB) ( 1086 )   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. Related Articles | Metrics

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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 ( 817 )   PDF (1161KB) ( 938 )   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. Related Articles | Metrics

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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 ( 694 )   PDF (2059KB) ( 801 )   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. Related Articles | Metrics