吴大伟¹, 颜廷波², 李腾飞¹, 王应霞³, 肖玉斌¹, 薛志欣¹, 夏延致¹
1.青岛大学化学化工学院 海洋纤维新材料研究院生物多糖纤维成形与生态纺织国家重点实验室, 山东 青岛 266071;2.青岛兴程人力资源有限公司, 山东 青岛 266071;3.中国科学院 海洋研究所, 山东 青岛 266071

摘要:
利用湿法纺丝技术制备了琼胶/SiO₂复合纤维，对琼胶分子在溶液中的分散性、纺丝液流变性、纤维的形貌、化学结构分别用DLS、旋转黏度计、SEM、FTIR和XRD进行了表征，并对纤维的力学性能、热性能和吸湿性能进行了测定。研究结果表明：琼胶分子在溶液中呈纳米尺度分布，纺丝液具有良好的流动性；琼胶/纳米SiO₂复合纤维具有良好的形态。随着纳米SiO₂的添加量逐渐提高，复合纤维的力学拉伸强度先增强后降低，复合纤维的吸水性降低，复合纤维的热稳定性逐渐增强。结合复合纤维综合性能，纳米SiO₂的最佳添加质量分数为0.5%。
关键词:湿法纺丝流变琼胶纤维/SiO₂复合纤维纤维性能
DOI：10.11759/hykx20200213001
分类号:TQ341
基金项目:国家自然科学青年基金项目（50803030）；中国博士后科学基金项目（20100471495，201104618）；山东省自然科学基金（ZR2016EMB）

Preparation and properties of agar/SiO₂ blend fibers
WU Da-wei¹, YAN Ting-bo², LI Teng-fei¹, WANG Ying-xia³, XIAO Yu-bin¹, XUE Zhi-xin¹, XIA Yan-zhi¹
1.College of Chemistry and Chemical Engineering, Institute of Marine Biobased Materials, State Key Laboratory of Bio-fibers and Eco-textiles, Qingdao University, Qingdao 266071, China;2.Prospect Human Resources Co., Ltd., Qingdao 266071, China;3.Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
Abstract:
Agar/SiO₂ blend fibers were successfully prepared by the wet-spinning process. The dispersion of agar in solution, the rheological properties of the spinning dope, and the morphology and chemical structure of the fibers were characterized by dynamic light scattering, the rotation viscometer, scanning electron microscopy, Fourier-transform infrared spectroscopy, and X-ray diffraction. The properties of mechanical strength, thermal stability, and water adsorption of the fibers were determined. The results showed that the agar molecules were distributed in nano-scale in solution, the spinning dope featured good fluidity, and the agar/SiO₂ blend fibers had a fine uniform morphology. With an increase in the SiO₂ concentration, the mechanical strength of the blend fibers first increased slightly and then decreased, the water absorbance of the blend fibers decreased, and the thermal stability of the blend fibers increased.
Key words:wet spinningrheologyagar/SiO₂ blend fibersmechanical properties





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