可吸收生物玻璃陶瓷/聚己内酯复合接骨板的制备工艺及力学性能  

Preparation Process and Mechanical Properties of Absorbable Biological Glass Ceramic/Polycaprolactone Composite Bone Plate

作　　者：杨蒙蒙 伍言龙 赵广宾 陈旭 刘亚雄[2] 周建平 YANG Mengmeng;WU Yanlong;ZHAO Guangbin;CHEN Xu;LIU Yaxiong;ZHOU Jianping(School of Mechanical Engineering, Xinjiang University, Urumqi 830047, China;Ji Hua Laboratory, Foshan, Guangdong 528200, China;State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an 710049, China)

机构地区：[1]新疆大学机械工程学院,乌鲁木齐830047 [2]季华实验室,广东佛山528200 [3]西安交通大学机械制造系统工程国家重点实验室,西安710049

出　　处：《西安交通大学学报》2021年第3期155-163,共9页Journal of Xi'an Jiaotong University

基　　金：国家重点研发计划资助项目(2018YFB1106904);国家自然科学基金资助项目(52075421);季华实验室建设资助项目(X200031TM200)。

摘　　要：针对生物陶瓷存在脆性高、韧性差无法满足接骨板所需的力学性能的问题,提出采用光固化陶瓷成形技术结合聚合物渗透法,在多孔陶瓷中渗透聚己内酯,制备出集强度韧性和生物相容性于一体的可吸收陶瓷/聚己内酯复合结构。对不同烧结保温时间下多孔陶瓷的微观孔隙分布进行了研究,探讨了不同渗透时间对可吸收玻璃陶瓷/聚己内酯复合材料微观结构和力学性能的影响,分析了多孔陶瓷在渗透聚己内酯前后和不同渗透时长两种情况下的增强增韧机理,并利用所提出的方法制备玻璃陶瓷/聚己内酯复合接骨板。实验结果表明:当多孔陶瓷微观孔隙较多时,利于后期渗透工艺;渗透聚己内酯可大大改善复合材料的力学性能,在应力屏蔽和缺陷修复两种机制综合作用下复合材料的抗压强度和抗弯强度显著增加,其韧性也因聚己内酯固有韧性和裂纹桥接机制有所提升。根据该工艺研究,当烧结保温时间为120 min、渗透时间为240 min时,复合材料的力学性能最佳,强度和韧性达到最佳,为可吸收接骨板提供了一种可行性方案。To solve the problem that high brittleness and poor toughness of bioceramics cannot meet the required mechanical properties of bone plate,a method for fabricating absorbable ceramics/polycaprolactone(PCL)composites with excellent strength,toughness and biocomp-atibility is proposed.The method combines digital light processing(DLP)3D printing technology and polymer infiltration method in which molten PCL was infiltrated into 3D printed porous ceramics to fabricate composite structure.The microscopic pore distribution of porous ceramics at different sintering times was studied and the effects of different infiltration times on the microstructure and mechanical properties of glass ceramic/PCL composites were investigated.The strengthening and toughening mechanisms of porous ceramics before and after permeation with PCL and at different permeation times were analyzed.Glass ceramic/PCL composite bone plate was prepared by the proposed method.The experimental results showed that the porous ceramics with higher porosity is beneficial to the infiltration process.The mechanical properties of the composites can be greatly improved by the infiltration of PCL.The compressive and flexural strength of the composites are significantly increased under the combined action of stress shielding and defect repair mechanisms,and the toughness of the composites is also improved due to the toughness of PCL and the crack bridging mechanism.Based on the experimental results,the mechanical properties of the composite material(strength and toughness)reached the optimum when the sintering holding time was 120 min and the infiltration time was 240 min,which provides a feasible scheme for the bio-absorbable bone plate.

关 键 词：可吸收接骨板 玻璃陶瓷 聚己内酯 复合材料 力学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]