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马铃薯淀粉颗粒在微细化过程中结晶结构的变化 被引量:35
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作者 胡飞 陈玲 李琳 《精细化工》 EI CAS CSCD 北大核心 2002年第2期114-117,共4页
采用偏光显微镜、X光衍射及差热分析等测试手段 ,探讨了马铃薯淀粉颗粒在用机械球磨微细粉碎过程中结晶结构变化的特征及规律。结果表明 ,机械力化学效应使得淀粉颗粒结晶结构受到破坏 ,结晶程度降低 ,最终由多晶态转变成非晶态。马铃... 采用偏光显微镜、X光衍射及差热分析等测试手段 ,探讨了马铃薯淀粉颗粒在用机械球磨微细粉碎过程中结晶结构变化的特征及规律。结果表明 ,机械力化学效应使得淀粉颗粒结晶结构受到破坏 ,结晶程度降低 ,最终由多晶态转变成非晶态。马铃薯淀粉的糊化温度也随粉磨时间的延长而降低 ,糊化相变吸热峰逐渐消失 ,水分相变吸热峰增强。 展开更多
关键词 马铃薯淀粉 微细化 结晶结构 机械力学效应
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Geometry effect on mechanical properties of woven fabric composites
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作者 KIM Myungsoo SONG Jung-Il 《Journal of Central South University》 SCIE EI CAS 2011年第6期1985-1993,共9页
The effects of geometry on mechanical properties in woven fabric composites were explored. Two types of composites, including one-layered and two-layered composites, were designed and studied. For one-layered composit... The effects of geometry on mechanical properties in woven fabric composites were explored. Two types of composites, including one-layered and two-layered composites, were designed and studied. For one-layered composites, inter-strand gap effects on the mechanical properties were studied, while three cases of geometries with inter-strand gaps in two-layered composites were evaluated. A woven fiber micromechanics analytical model called MESOTEX was employed for theoretical simulation. The predicted results show that the inter-strand gap and simple variation of the strand positions in a repeating unit cell significantly affect the mechanical properties of woven fabric composites. 展开更多
关键词 woven fabric composites inter-strand gap mechanical properties micromechanics modeling
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