摘要：Long-segment defects remain a major problem in clinical treatment of tubular tissue *** design of tubular scaffold with desired structure and functional properties suitable for tubular tissue regeneration remains a great challenge in regenerative ***,we present a reliable method to rapidly fabricate tissueengineered tubular scaffold with hierarchical structure via 4-axis printing *** fabrication process can be adapted to various biomaterials including hydrogels,thermoplastic materials and thermosetting *** polycaprolactone(PCL)as an example,we successfully fabricated the scaffolds with tunable tubular architecture,controllable mesh structure,radial elasticity,good flexibility,and luminal *** a preliminary demonstration of the applications of this technology,we prepared a hybrid tubular scaffold via the combination of the 4-axis printed elastic poly(glycerol sebacate)(PGS)bio-spring and electrospun gelatin *** scaffolds seeded with chondrocytes formed tubular mature cartilage-like tissue both via in vitro culture and subcutaneous implantation in the nude mouse,which showed great potential for tracheal cartilage reconstruction.

摘要：利用静电纺丝法,采用TiO2凝胶实现了聚丙烯腈(PAN)/TiO2超细纤维的制备。应用TEM、SEM、红外光谱、X射线衍射光谱等方法对其进行了理化性能表征,并测试了其对金黄色葡萄球菌的抗菌性能。结果表明:随PAN溶液与TiO2凝胶质量比的降低,电纺纤维尺寸较均匀,珠状物逐渐减少;该比率(PAN溶液∶TiO2凝胶)为3.5∶1时对金黄色葡萄球菌的抗菌率达到82%。由此制备的超细纤维有望用于过滤膜、防护服及医用敷料等纺织材料领域。

摘要：应用静电纺丝装置制备出锦纶6/TiO2复合超细纤维非织造布,采用扫描电子显微镜、能谱分析仪、红外光谱仪探讨其微观形貌、结构,通过抗菌性能测试验证其功能性,以期用于新型过滤膜、防护服等功能型复合材料。结果表明:TEOS助剂的添加实现了TiO2纳米颗粒的改性,有利于较好形貌的锦纶6/TiO2纤维的形成;当TiO2在锦纶6/TiO2超细纤维中质量分数为6%和8%时,静电纺纤维尺寸较均匀,珠状物较少;随质量分数增加,锦纶6/TiO2纤维膜对大肠杆菌的抗菌效果有所提高,当达到10%和12%时,其抗菌率均在80%以上。