摘要
将聚乳酸(PLA)短纤纱与聚乙烯醇(PVA)/海藻酸钠(SA)混合水凝胶溶液复合,经冷冻、解冻、浸泡和干燥后获得水凝胶复合纱线,并进一步进行矿化处理。通过扫描电子显微镜(SEM)、能谱(EDS)、红外光谱(FTIR)、吸水率和拉伸测试对试样的形貌结构、元素组成、基团变化、亲水性和力学性能表征分析。结果表明:复合纱线中水凝胶成功披覆纱线表面并渗透入纱线内部,在纱线表面形成三维微孔结构;经矿化处理后,纱线表面沉积大量磷灰石,且磷灰石含量多于纯PLA短纤纱;与纯PLA短纤纱相比,复合纱线吸水率增加约50%,力学性能增强。该制备所得复合纱线具有良好的体外生物活性、吸水性和力学性能,可用于构建组织工程支架材料。
The polylactic acid(PLA)spun yarn was combined with mixed hydrogel solution of polyvinyl alcohol(PVA)/sodium alginate(SA).After freezing,thawing,soaking and drying,the hydrogel composite yarn was obtained andfurther mineralization treatment was carried out.The morphology,elemental composition,group change,hydrophilicity and mechanical properties were characterized by scanning electron microscopy(SEM),energy dispersive spectroscopy(EDS),infrared spectroscopy(FTIR),water absorption and tensile tests.The results show that the hydrogel in the composite yarn successfully wascoated on the surface of the yarn and penetrated into the inside of the yarn to form a three-dimensional microporous structure on the surface of the yarn.After mineralization,a large amount of apatite was deposited on the surface of the yarn.The apatite content was more than pure PLA spun yarn.Compared with the pure PLA spun yarn,the water absorption of the composite yarn increased by about 50%,and the mechanical properties were enhanced.The composite yarn has good in vitro biological activity,water absorption and mechanical properties,which can be used to construct tissue engineering scaffolds.
作者
刘玉
徐国平
祝佳琼
LIU Yu;XU Guoping;ZHU Jiaqiong(College of Materials and Textiles,Zhejiang Sci-Tech University,Hangzhou 310018,China)
出处
《浙江理工大学学报（自然科学版）》
2019年第6期723-729,共7页
Journal of Zhejiang Sci-Tech University(Natural Sciences)
关键词
聚乙烯醇
海藻酸钠
水凝胶
复合纱线
支架材料
polyvinyl alcohol
sodium alginate
hydrogel
composite yarn
scaffold material
