| 改性剂对纳米片状羟基磷灰石/聚乳酸复合材料性能的影响 |
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| 引用本文： | 黄梽焕,万怡灶,朱享波,张全超,杨志伟,罗红林.改性剂对纳米片状羟基磷灰石/聚乳酸复合材料性能的影响[J].复合材料学报,2021,38(3):749-760. |
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| 作者姓名： | 黄梽焕 万怡灶 朱享波 张全超 杨志伟 罗红林 |
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| 作者单位： | 华东交通大学先进材料研究院,南昌330013 |
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| 基金项目： | 国家自然科学基金(51662009,31660264,32000947)。 |
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| 摘 要： | 分别采用硅烷偶联剂(SC)和硬脂酸(SA)对纳米层片状羟基磷灰石(LHAp)进行表面改性，并通过挤塑工艺制备未改性和两种改性纳米片状羟基磷灰石(np-HAp)增强聚乳酸(PLA) (np-HAp/PLA、SC-np-HAp/PLA和SA-np-HAp/PLA)复合材料。比较了三种复合材料的微观结构、力学性能、热稳定性、结晶性及润湿性。利用XRD、FTIR、XPS、SEM、TGA、DSC、力学性能测试和接触角测试对复合材料的理化性能进行表征。研究发现，np-HAp、SA-np-HAp与PLA界面处存在相分离，而SC-np-HA与PLA两相界面结合紧密；与np-HAp/PLA复合材料相比，SC-np-HAp/PLA复合材料的压缩屈服强度和拉伸强度分别提高了9.4%和6.6%，而SA-np-HAp/PLA复合材料的压缩屈服强度和拉伸强度则出现减小；此外，与np-HAp/PLA复合材料相比，SC-np-HAp/PLA和SA-np-HAp/PLA复合材料的初始分解温度分别提高了7.4%和5.6%，SC-np-HAp/PLA复合材料的结晶度提高了6.7%，SA-np-HAp/PLA复合材料的结晶度则减小了3.5%。水接触角测试结果表明，与np-HAp/PLA复合材料和SA-np-HAp/PLA复合材料相比，SC-np-HAp/PLA复合材料具有更为优异的亲水性。上述结果表明，经SC改性后的np-HAp具有与PLA基体更好的界面结合能力，为制备性能优异的骨植入复合材料提供借鉴。
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| 关 键 词： | 纳米片状羟基磷灰石 表面改性 硅烷偶联剂 硬脂酸 聚乳酸 复合材料 |
| 收稿时间： | 2020-07-27 |
Effect of modifier on properties of nano-platelet hydroxyapatite/polylactic acid composites |
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| HUANG Zhihuan,WAN Yizao,ZHU Xiangbo,ZHANG Quanchao,YANG Zhiwei,LUO Honglin.Effect of modifier on properties of nano-platelet hydroxyapatite/polylactic acid composites[J].Acta Materiae Compositae Sinica,2021,38(3):749-760. |
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| Authors: | HUANG Zhihuan WAN Yizao ZHU Xiangbo ZHANG Quanchao YANG Zhiwei LUO Honglin |
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| Affiliation: | Institute of Advanced Materials, East China Jiaotong University, Nanchang 330013, China |
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| Abstract: | The surface modification of nano-lamellar hydroxyapatite(LHAp)was carried out with silane coupling agent(SC)and stearic acid(SA),separately.The unmodified and two modified nano-platelet hydroxyapatite(npHAp)reinforced polylactic acid(PLA)(np-HAp/PLA,SC-np-HAp/PLA,and SA-np-HAp/PLA)composites were prepared by extrusion process.The microstructure,mechanical properties,thermal stability,crystallinity,and wettability of the three composites were compared.XRD,FTIR,XPS,SEM,TGA,DSC,mechanical property test,and contact angle test were conducted to characterize the physiochemical properties of the composites.The results show that there is phase separation at the interface of np-HAp or SA-np-HAp and PLA,and the interface of SC-npHAp/PLA composite demonstrates strong interface adhesion.Compared with np-HAp/PLA composite,the compressive yield strength and tensile strength of SC-np-HAp/PLA composite increase by 9.4%and 6.6%,respectively,while SA-np-HAp/PLA composite exhibites reductions.Further,compared with np-HAp/PLA composite,the initial decomposition temperature of SC-np-HAp/PLA and SA-np-HAp/PLA composites increases by 7.4%and 5.6%,respectively,and crystallinity of the former increases by 6.7%,while the latter decreases by 3.5%.Compared with npHAp/PLA and SA-np-HAp/PLA composites,the SC-np-HAp/PLA composite has a significantly lower water contact angle.These results indicate that the SC-modified np-HAp has better interface compatibility with PLA matrix,which will provide a new criterion for the preparation of high-performance bone implant composites. |
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| Keywords: | nano-platelet hydroxyapatite surface modification silane coupling agent stearic acid polylactic acid composites |
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