李楠,王瑞莉,侯成义,刘梅,张青红
LI Nan,WANG Rui-li,HOU Cheng-yi,LIU Mei,ZHANG Qing-hong

• 1:东华大学材料科学与工程学院
• 2:南京医科大学江苏省口腔疾病重点实验室

摘要(Abstract)：

以羟基磷灰石(HAp)纳米颗粒及聚甲基丙烯酸甲酯(PMMA)为主要原料,采用静电纺丝的方法制备了直径均匀、取向良好的HAp/PMMA纳米复合纤维,并通过场发射扫描电镜、傅里叶红外吸收光谱仪、热重分析仪对复合纤维进行了表征。将研磨后的复合纤维作为填料,与微纳米二氧化硅按一定比例填充后,光固化得到齿科复合树脂。力学性能测试表明:填充质量分数为1%的HAp/PMMA复合纤维有效提高了氧化硅基复合树脂的力学性能,其弯曲模量为(8.7±0.7) GPa,弯曲强度为(113.8±5) MPa,压缩强度为(320.1±62) MPa;当复合纤维填充量从质量分数1%提高至3%、5%后,力学强度呈下降趋势。扫描电镜表征显示,当填充量提高后,高分子对填料的浸润性变差,出现部分孔隙及缺陷,导致其力学性能有所下降。
HAp/PMMA nanocomposite fibers with uniform diameter and somewhat orientation were prepared by electrospinning with hydroxyapatite(HAp) nanoparticles and PMMA as the main raw materials. The composite fiber was characterized by FESEM, FTIR and TGA, and the milled composite fiber was co-filled with micro/nano silica in the varying proportion, and then the dental composite resin was obtained by light curing. Mechanical property tests showed that filling 1% HAp/PMMA composite fiber effectively improved the mechanical properties of silica matrix composite resin, with flexural modulus of(8.7±0.7) GPa, flexural strength of(113.8±5) MPa and compression strength of(320.1±62) MPa, respectively. When the filling content of composite fiber increased from 1% to 3% and 5%, the mechanical strength decreased. FESEM results showed that when the filling amount was increased, the infiltration of the polymer to the filler became worse, and some pores and defects appeared, leading to decline and fall in the mechanical properties.

关键词(KeyWords)： 复合纳米纤维;羟基磷灰石;齿科树脂;力学强度;光固化深度
composite nanofiber;hydroxyapatite;dental resin;mechanical strength;depth of cure

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划(2016YFA0201702/2016YFA0201700);; 国家自然科学基金项目(81701025)

作者(Author): 李楠,王瑞莉,侯成义,刘梅,张青红
LI Nan,WANG Rui-li,HOU Cheng-yi,LIU Mei,ZHANG Qing-hong

DOI: 10.16090/j.cnki.hcxw.2020.02.009

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