文献类型：期刊文献

中文题名：乙酰木粉基复合材料的热学性能研究

英文题名：Study on thermal property of acetylated wood flour based composite

作者：谢振华[1] 张明明[1] 金立维[1,2]

第一作者：谢振华

机构：[1]中国林业科学研究院林产化学工业研究所,生物质化学利用国家工程实验室,国家林业局林产化学工程重点开放性实验室,江苏省生物质能源与材料重点实验室,南京210042;[2]中国林业科学研究院林业新技术研究所,北京100091

年份：2015

卷号：43

期号：7

起止页码：73-75

中文期刊名：化工新型材料

外文期刊名：New Chemical Materials

收录：北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

基金：林业公益性行业科研重大专项(201104004)

语种：中文

中文关键词：乙酰化木粉;复合材料;热学性能

外文关键词：acetylated wood flour; composite; thermal property

分类号：TQ174.758

摘要：通过双螺杆挤出、注塑方法制备了木粉(WF)、乙酰化木粉(AWF)与低密度聚乙烯(LDPE)、聚乳酸(PLA)的复合材料,对其加工性能进行了研究,并采用动态热机械分析(DMA)、差示扫描量热分析(DSC)、热重分析(TGA)等表征了共混材料的热学性能。结果表明:AWF基共混材料相对WF基共混材料在加工过程中的黏度和扭矩较小,说明其具有更优的加工性能;由AWF制备的共混材料相比具有更低的储能模量,WF和AWF的加入对塑料基体的分子链段运动有一定的影响,但对PLA的玻璃化转变温度影响不明显;DSC结果显示WF/PLA材料在加热过程中出现了很明显的冷结晶峰,其冷结晶焓也高于AWF/PLA材料,说明乙酰化改性大幅削弱了木粉基共混材料中PLA的冷结晶行为;热重分析的结果显示AWF基共混材料的热稳定性更高。
Blend composites of WF,AWF,LDPE and PLA were produced by twin-screw extrusion and injection molding.Processing properties of blend composites were studied,and thermal properties of composites were charactered by dynamic mechanical analysis（DMA）,differential scanning calorimeter（DSC）and thermogravimetric analysis（TGA）.The result showed that composites of AWF had lower viscosity and torque in the extrusion process than composites of WF,which revealed the former had better processability.Blend composites of AWF had lower storage modulus,and there was certain influence of adding WF and AWF on the molecular chains＇ movement of plastic matrix,but no influence on the glass transition temperature of PLA was observed.The result of DSC showed that obvious cold crystallization peak appeared during the heating process of WF/PLA composites,its cold crystallization enthalpy was bigger than composites of AWF/PLA,which reflected the influence of adding AWF on cold crystallization of PLA was smaller.The result of TGA showed that composites of AWF had higher thermal stability.