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Yang L.,Dalian Polytechnic University | Guo J.,Dalian Polytechnic University | Guo J.,Functional Fiber and Its Composite Materials Engineering Technology Research Center in Liaoning Province | Zhang S.,Dalian Polytechnic University | And 10 more authors.
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | Year: 2015

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 3.5 min. The breaking strength of the fiber is around 2.58 CN/dtex. ©, 2015, Chengdu University of Science and Technology. All right reserved. Source

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