Preparation and properties of sodium alginate/feather keratin composite fibers
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摘要: 采用酸碱法在鸭毛中提取羽毛角蛋白（FK），通过正交实验研究了FK提取的最佳条件。将FK与海藻酸钠（SA）进行共混，制备SA/FK复合溶液，测试了复合溶液的流变性。通过湿法纺丝制备SA/FK复合纤维，研究了复合纤维的基本性能并表征了复合纤维分子间氢键作用。结果表明：在最佳提取条件下（提取温度为60.0℃，提取时间为120.00 min，碱浓度为2.00wt%），FK产率最高为45.75%。SA/FK复合溶液的表观黏度随剪切速率的增加而减小，随FK含量的增加呈现先增后减的趋势。FK的加入使分子间氢键作用增强。SA/FK复合纤维的力学断裂强度能够达到1.96 cN/dtex。SA与FK的复合破坏了原有分子的晶体结构，SA/FK复合纤维分子结构是以非晶态存在。SA/FK复合纤维的表面具有均匀的沟槽结构。Abstract: Based on the acid-alkali method to extract feather keratin in duck feather, the optimum conditions for extraction of feather keratin were studied by orthogonal experiment.The feather keratin and sodium alginate were mixed to prepare sodium alginate/feather keratin (SA/FK) composite solution and the rheology of solution was tested. The SA/FK composite fibers were prepared by wet spinning. The basic properties of composite fibers were studied and the intermolecular hydrogen bondsof composite fibers were characterized. The results show that under the optimum extracting condition (the temperature is 60.0℃, the reaction time is 120.00 min, alkali concentration is 2.00wt%), the feather keratin presents the largest production rate of 45.75%. The apparent viscosity of the SA/FK composite solution decreases with the increasing of shear rate and increases first and then decreases with the increasing of the feather keratin content. The addition of feather keratin enhances the intermolecular hydrogen bonds. The fracture strength of SA/FK composite fiber can reach 1.96 cN/dtex. The recombination of sodium alginate and the feather keratin damage the crystalline structure of the original molecule. The molecular structure of SA/FK composite fibers exist as amorphousstate. The surface of SA/FK composite fibers have a uniform trench structure.
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Keywords:
- feather keratin /
- extraction /
- orthogonal experiment /
- sodium alginate /
- composite fiber /
- hydrogen bond
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