摘要
采用DV-C数显黏度计对海藻/磷虾蛋白(SA/AKP)复合材料溶液的流变性能进行研究,讨论了溶液黏度,粘流活化能、非牛顿指数、结构黏度指数与切变速率、温度之间的关系,并以流变性为指导制备SA/AKP复合纤维。探究了其表面形貌、力学性能与凝固浴浓度、停留时间的关系,并对复合纤维的性能进行分析。结果表明,SA/AKP纤维极限氧指数高达39;复合纤维以非晶形态存在;AKP的加入没有使纤维出现发霉腐败的现象,但使纤维的热稳定性略有降低;SA/AKP溶液属于假塑性流体,黏度随切变速率的增大而减小;纤维表面具有均匀的沟槽结构,断面呈现圆形或椭圆形形貌。纺丝最佳工艺为SA质量浓度3%,AKP质量份数30phr,80℃挤出,CaCl2质量浓度5%,凝固时间3.5min,纤维的断裂强度达2.58CN/dtex。
The sodium alginate/Antarctic Krill protein（SA/AKP）composite fiber was prepared successfully.The rheological properties of the composites were studied by DV-C digital rotational viscometer,and the relationship of relative rheological factors was discussed,such as temperature,shear rate,viscosity,viscous flow activation energy,non-Newtonian index,structural viscosity index and so on.Meanwhile,the processing factors（coagulation bath concentration,residence time）,microstructure（the surface morphology）and performance of the SA/AK composite fiber were also studied.The results of study show that the SA/AKP limits oxygen index（LOI）is around 39.The study also indicates that the SA/AK composite fiber is poor in crystal structure.The thermal stability decreases slightly due to the addition of AKP component.The SA/AKP solution can be regard as pseudoplastic fluid,its viscosity decreases as the shear rate increasing.Moreover,the study shows that the surface of composite fiber shows uniform groove microstructure and the cross section presents round or oval.Finally,the optimum processing condition of the SA/AK composite fiber is as follow：the SA mass concentration is 3%,the AKP is 30 phr by mass,spinning temperature is around 80℃,CaCl2 mass concentration is 5%,the coagulation time is 3.5min.The breaking strength of the fiber is around 2.58CN/dtex.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2015年第10期146-153,共8页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(51373027)
辽宁省教育厅一般项目(LR2012017)
关键词
海藻酸钠
南极磷虾蛋白
流变性
共混纤维
sodium alginate
Antarctic krill protein
rheological property
blend fiber
