In the present work,novel cellulose(C)/Antarctic krill protein(AKP)composite fbers with a multiple cross-linking network were prepared using glutaraldehyde(GA)as cross-linking agent to improve the fber's properties.The structure and properties of fbers were characterized by diferent 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 fbers with a multiple cross-linking network has stronger crystallization ability,higher orientation degree and deeper trench than C/AKP composite fbers.The breaking stress and wet strength of composite fbers 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 fbers has been improved.The development of C/AKP composite fbers with a multiple cross-linking network could be a promising candidate for biomedicine applications.
Qiang YangJing GuoYuanfa LiuFucheng GuanJingxing SongXueyong Gong
为提高海藻酸钠/南极磷虾蛋白(SA/AKP)复合纤维的强度,采用聚乙烯醇(PVA)共混改性,并用湿法纺丝制备改性海藻酸钠纤维。通过傅里叶变换红外光谱研究了复合纤维基本结构,并用二阶导数和高斯拟合分峰表征复合体系中氢键的作用,同时分析了改性后复合纤维表面形貌、结晶性能、力学性能。结果表明,SA/AKP/PVA复合体系中氢键的类型和含量,随PVA增多自由羟基的数量由1.2%增加到3.6%,分子间氢键数量由57.8%减少到54.8%,而体系分子内氢键数量几乎没有变化。复合纤维表面沟槽变细且分布更加均匀。随PVA含量的增加,复合纤维的结晶度降低,力学性能呈先增后减的趋势,当PVA含量为3.5%时,其断裂强度达到最大值2.43 c N/dtex。