期刊：
PROCEEDINGS OF THE 2007 INTERNATIONAL CONFERENCE ON AGRICULTURE ENGINEERING,2007年:670-674
作者机构：
[Wu Yi-Qiang; Liu Yuan] Cent S Univ Forest & Technol, Coll Mat Sci & Technol, Changsha 410004, Peoples R China.
会议名称：
2007 International Conference on Agriculture Engineering(2007年农业工程国际会议)
会议时间：
2007-10-20
会议地点：
河北保定
会议论文集名称：
2007 International Conference on Agriculture Engineering(2007年农业工程国际会议)论文集
关键词：
drying temperature;plantation-grown Eucalyptus;colorimetric parameters;CIEL*C*h colour system
摘要：
In order to make out the reasonable drying technology suitable for plantation-grown eucalypt wood, the the colorimetric parameters in seven species of Eucalyptus urophylla, E.grandis, E.urophyllaxE.grandis, E. grandisxE.urophylla, E.dunii, E.cloeziana and E. pellita wood dried at 3 levels of 20 degrees C, 60 degrees C and 100 degrees C were measured and evaluated. The results demonstrated that: (1) The lightness(L*), chroma(C*),hue value(h) and color difference (Delta E*ab) in seven species of plantation-grown eucalyptus wood appeard to be turning point at 60 degrees C, except for E. dunii. (2) Color change at less than 60 degrees C would be mainly affected by the polyphenol compounds, in particular hydrolysable tannins, while either the degradation of hemicellulose or the combination of hemicellulose and polyphenol compounds probably played major role in color change at more than 60 degrees C. (3) With the increasing of temperature, Delta E*ab gradually decreased and the color becamed more homogeneous. Accordingly, it is suggested that it should be reasonable to properly enhance temperature in the last stage of drying plantation-grown eucalypt wood.
作者机构：
[吴义强; 陈鹤梅] College of Materials Science and Engineering, Central South University Forestry and Technology, Changsha 410004, China;[Goda, Koichi] Department of Mechanical Engineering, Yamaguchi University, Yamaguchi 7558611, Japan;[曹勇] College of Materials Science and Engineering, Central South University Forestry and Technology, Changsha 410004, China<&wdkj&>Department of Mechanical Engineering, Yamaguchi University, Yamaguchi 7558611, Japan
通讯机构：
[Cao, Y.] C;College of Materials Science and Engineering, Central South University Forestry and Technology, China
期刊：
PROCEEDINGS OF THE 2007 INTERNATIONAL CONFERENCE ON ADVANCED FIBERS AND POLYMER MATERIALS VOLS 1 AND 2,2007年1:299-302
通讯作者：
Cao Yong
作者机构：
[Wu Yiqiang; Cao Yong] Cent S Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.
通讯机构：
[Cao Yong] C;Cent S Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China.
会议名称：
2007年先进纤维与聚合物国际会议
会议时间：
2007-10-15
会议地点：
上海
会议论文集名称：
2007年先进纤维与聚合物国际会议论文集
摘要：
Multi-ply laminate biodegradable composites made from kenaf fibers and polylactide acid biodegradable resin we're fabricated by a hot press forming. The effects of different laminate methods and kenaf fiber mass fractions on mechanical properties were investigated. The tensile properties and impact strength of the unidirectional (0 degrees ply) and cross-ply laminate composites increased with increasing fiber mass fraction. This clarified the reinforcement effect of kenaf fibers. Compared with the unidirectional (90 degrees ply) and cross-ply laminate composites, the tensile properties and impact strength of the unidirectional (0 degrees ply) composite showed higher values. This was attributed to the different fiber orientations in these composites. The observations of the tensile and impact fracture modes and SEM micrographs of the fracture surface could support this result.
期刊：
PROCEEDINGS OF INTERNATIONAL CONFERENCE ON HEALTH MONITORING OF STRUCTURE, MATERIALS AND ENVIRONMENT, VOLS 1 AND 2,2007年:1161-1165
通讯作者：
Peng, Wanxi
作者机构：
[Wu, Yiqiang; Peng, Wanxi; Ma, Qingzhi] Cent S Forestry Sci & Technol Univ, Coll Mat Sci & Engn, Changsha 410014, Peoples R China.
通讯机构：
[Peng, Wanxi] C;Cent S Forestry Sci & Technol Univ, Coll Mat Sci & Engn, Changsha 410014, Peoples R China.
关键词：
gas chromatography;mass spectrometry;cold water extractives;Castanopsis fissa
摘要：
The chemical components of Cold Water extractives of Castanopsis fissa wood chips were separated and identified by GC/MS after enriching and dissolving in benzene-methanol in order to their economic properties. Relative content of each component was determined by area normalization. 18 compounds representing 80.1% of the extractives were identified. The most abundant constituents were butachlor(40.73%), 2,3-diphenyl-5-(3-methoxyphenyl) pyrrole (4.57%), 1,2-benzenedicarboxylic acid, bis(2-methylpropyl) ester (cas) (4.44%), vitamin E(3.83%), hexanedioic acid, bis(2-methylpropyl) ester (3.51%), 1, 2-benzenedicarboxylic acid, diisooctyl ester (2.93%), cyclohexanol, dodecyl(2.76%), dibutyl phthalate(2.51%), 2,6-di-tert-butyl-4-(dimethylaminomethyl) phenol (2.49%), 3-hydroxy-2,4-dimethoxy-6-(methoxymethyl) benzoic acid(2.39%), 4,5,6,7,8,9-hexahydrocycloocta [c] furan-1(3h)-one(2.38%), hexadecanoic acid, methyl ester (cas) (2.27%), hexadecanoic acid, ethyl ester (cas) (2.11%), pentanedioic acid, dibutyl ester (cas) (1.02%) and so on.
作者机构：
[吴义强] College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China;[Goda, Koichi] Department of Mechanical Engineering, Yamaguchi University, Yamaguchi 7558611, Japan;[曹勇] College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China<&wdkj&>Department of Mechanical Engineering, Yamaguchi University, Yamaguchi 7558611, Japan
通讯机构：
[Cao, Y.] C;College of Materials Science and Engineering, Central South University of Forestry and Technology, China
