In the present work, novel cellulose (C)/Antarctic krill protein (AKP) composite fibers with a multiple cross-linking network were prepared using glutaraldehyde (GA) as cross-linking agent to improve the fiber's properties. The structure and properties of fibers were characterized by different techniques including FTIR, NMR, XRD, SAXS, SEM and electronic single yarn strength tester, etc. The results indicate that the reaction of GA with C and AKP separately forms a multiple cross-linking network. The C/AKP composite fibers with a multiple cross-linking network has stronger crystallization ability, higher orientation degree and deeper trench than C/AKP composite fibers. The breaking stress and wet strength of composite fibers reaches the maximum of 1.04 cN/dtex and 0.55 cN/dtex at GA content of 0.2 wt%. And the fatigue and tensile properties, hygroscopicity and moisture retention of C/AKP composite fibers has been improved. The development of C/AKP composite fibers with a multiple cross-linking network could be a promising candidate for biomedicine applications.

Graphic abstract

中文翻译：

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具有多重交联网络的纤维素/南极磷虾蛋白复合纤维的改进性能

在目前的工作中，使用戊二醛 (GA) 作为交联剂制备了具有多重交联网络的新型纤维素 (C)/南极磷虾蛋白 (AKP) 复合纤维，以改善纤维的性能。通过FTIR、NMR、XRD、SAXS、SEM和电子单纱强力测试仪等不同技术对纤维的结构和性能进行表征。结果表明GA与C和AKP的反应分别形成了多重交联网络. 具有多重交联网络的C/AKP复合纤维比C/AKP复合纤维具有更强的结晶能力、更高的取向度和更深的沟槽。复合纤维的断裂应力和湿强度在 GA 含量为 0.2 wt% 时达到最大值 1.04 cN/dtex 和 0.55 cN/dtex。以及疲劳和拉伸性能，C/AKP复合纤维的吸湿性和保水性得到改善。具有多重交联网络的 C/AKP 复合纤维的开发可能是生物医学应用的有希望的候选者。

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