淀粉基可降解纤维制备及其性能的研究.pdf

,,并对可降解纤维的性能进行了较系统研究与表征。首先,采用熔融挤出纺丝技术制各了淀粉基可生物降解纤维,利用红外光谱仪、、差示扫描量热仪(DSC)、热分析仪(TG)以及单纤维强力仪等对纤维的结构和性能进行了测试和分析,通过土埋生物降解实验,研究了纤维的生物降解性能。借助数码相机以及扫描电子显微镜(SEM)对降解前后纤维试样的形貌特征进行了研究。结果表明,淀粉基可生物降解纤维中有结晶结构,具有较好的热稳定性,热分解温度为350℃左右:与其它常规纤维的力学性能相比,淀粉基可生物降解纤维具有较高的断裂强度与断裂伸长率,可以作为纤维材料使用。淀粉基可生物降解纤维在掩埋于土壤的过程中,随着时间的延长,降解率逐步增加,力学性能逐渐下降;纤维颜色逐渐变为褐色甚至黑色,纤维表面有微孔、裂缝出现,120天能达到完全降解,表明该纤维具有优异的可生物降解性;在不同pH值土壤中, 淀粉基可生物降解纤维的降解率不同,、,纤维的降解率较高;℃时,有利于淀粉基可生物降解纤维的快速降解。另外,。利用单纤维强力仪对纤维的力学性能进行了研究,通过紫外老化降解和土埋生物降解实验,。结果表明:,具备一定的物理机械强度,可以作为通用纤维材料使用:随着紫外光照时间的延长, ,%;随生物降解时间的增加,纤维的降解率逐步增大,,%;,:℃。关键词:熔融挤出纺丝;淀粉基纤维;力学性能:生物降解;光降解 Abstract With the biodegradable resin and materials,The starch based biodegradable degradable plastic masterbatch as raw fiberand photo·biodegradable fiberwas produced by melt andperformance forthe degradable fiber materials were researched andcharacterized indetail. The starch based biodegradable fiber was produced by melt andproperties were analysed with FTⅡ之,XRD, and mechanical surface features ofthe fibrebefore and afterdegradation was studiedwith digital camera and of the fibre was also investigsted inactivesludge. The resultsshow that thestarchbasedbiodegradable fiberwas ofgood thermal stability with the thermal position temperature 350。pared With the mechanical properties monly used fibers,the starchbasedbiodegradable fiberwas ofhiighmechanicalstrength and elongation atbreak,which can beused as general fiber starch based biodegradable fiberWas buried inthe theextension oftime,thedegradation rate increasedgradually,and the mechanical properties thebiological d