Effects of fiber mass fraction and alkali treatment on mechanical properties of biodegradable composites
Biodegradable composites of polylactic acid reinforced with wood fiber are fabricated by using twin screw extruder followed by the injection molding machine.The effects of fiber mass fraction and alkali concentration on mechanical properties of biodegradable composites are investigated.The results show that through carrying out the TG analysis of wood fiber,the most suitable temperature for composite materials processing is about 160℃ is chosen,the mechanical properties of biodegradable composites presented tendency which reduced first,elevated,and again reduced along with fiber mass fraction increased,after the alkali treatment,the mechanical properties of biodegradable composites have the tendency which increased first and then reduced,when the concentration of alkali solution is 8%,both the tensile strength and impact strength are best.The scanning electron microscope and Infrared Spectrum Analysis are also used for examination of the wood fiber and biodegradable composites.
wood fiber mass fraction alkali treatment mechanical properties Infrared spectrum analysis
zhi-yong Qin Yi-qiang Wu Yan Qing
School of Materials Science and Engineering Central South University of Forestry and Technology, Hunan Changsha, P.R. China 410000
国内会议
成都
英文
1-8
2010-07-01（万方平台首次上网日期，不代表论文的发表时间）