多孔二氧化硅填充环氧树脂复合材料的力学性能和机理研究

郑茹静; 郑振伟; 宋一波; 郭金山

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Study on mechanical properties and mechanism of porous silica filled epoxy resin nanocomposites

首发时间：2018-12-14

ZHENG Rujing ¹
ZHENG Rujing(1994-),Female,Master student,nanocomposite material
ZHENG Zhenwei ¹ SONG Yibo ¹ GUO Jinshan ¹
GUO Jinshan(1963-),male,Associate professor,nanocomposite material

1、Institute of Polymer Science and Engineering, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu, 730000, China

Abstract：It is well known that porous silica(P-SiO2) is widely used in nanocomposites. However, there is still no specific data to clearly explain the composite mechanism of porous silica in nanocomposites. Therefore, we prepared porous silica/epoxy nanocomposites with different porous silica loadings. Studies show that the pristine epoxy (EP) exhibits brittle fracture and the P-SiO2/ EP nanocomposites exhibit ductile fracture characteristics after filling the porous silica. Mechanical properties show that the strength and toughness of the nanocomposites increase at the same time. The impact strength of the pristine epoxy is 7.79 J/m2, and when the P-SiO2 content is 7%, the impact strength reaches a maximum at 15.70 J/m2 which is 101.54% increase compared with that of epoxy. From the TEM images, the tunnels of P-SiO2 are not obvious at the edge of the junction of P-SiO2/EP nanocomposites, but can be clearly seen at the junction in the middle.It means after compounding with epoxy resin, a certain amount of resin is adsorbed at the edge of porous silica, which makes it better to combine with epoxy resin. According to nitrogen adsorption/desorption isotherms and the FTIR spectra, the template agent interacts with the epoxy resin adsorbed at the edge of P-SiO2, so that the template agent is more closely entangled with the epoxy resin. P-SiO2 can greatly enhance the mechanical properties of P-SiO2/EP nanocomposites owing to the strong interfacial interaction between P-SiO2 and EP. When the content of the P-SiO2 is over 7%, the mechanical properties are deteriorated due to agglomeration between the nanoparticles.

keywords： composite material mechanical properties porous silica epoxy resin

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多孔二氧化硅填充环氧树脂复合材料的力学性能和机理研究

郑茹静 ¹
ZHENG Rujing(1994-),Female,Master student,nanocomposite material
郑振伟 ¹ 宋一波 ¹ 郭金山 ¹
GUO Jinshan(1963-),male,Associate professor,nanocomposite material

1、兰州大学化学化工学院高分子科学与工程研究所，甘肃兰州，730000

摘要：众所周知，多孔二氧化硅（P-SiO2）广泛用于纳米复合材料中。然而，仍然没有具体数据可以清楚地解释多孔二氧化硅在纳米复合材料中的复合机理。因此，我们制备了不同含量的多孔二氧化硅/环氧树脂纳米复合材料。研究表明，纯环氧树脂（EP）表现出脆性断裂，P-SiO2/EP复合材料在填充P-SiO2后表现出韧性断裂特征。机械性能表明纳米复合材料的强度和韧性同时增加。纯环氧树脂的冲击强度为7.79J/m2，当P-SiO2含量为7％时，冲击强度达到最大值15.70 J/m2，比环氧树脂增加101.54％。由透射电镜照片可知，P-SiO2的孔道在P-SiO2/EP复合材料的边缘结合处不明显，但可以在中间的结合处清楚看到。说明与环氧树脂复合后，一定量树脂被吸附在P-SiO2的边缘，使之与环氧树脂结合更好。根据氮气吸脱附等温线和红外光谱可知，模板剂与吸附在P-SiO2边缘的环氧树脂相互作用，使模板剂与环氧树脂缠结更紧密。由于P-SiO2与EP之间的强界面相互作用，P-SiO2可以大大提高P-SiO2/EP复合材料的力学性能。当P-SiO2的含量超过7％时，由于颗粒之间的团聚，机械性能劣化。

关键词：复合材料机械性能多孔二氧化硅环氧树脂

基金：

1. Key Research and Development Program of China（2016YFC0304502）

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ZHENG Rujing,ZHENG Zhenwei,SONG Yibo,et al. Study on mechanical properties and mechanism of porous silica filled epoxy resin nanocomposites[EB/OL]. Beijing:Sciencepaper Online[2018-12-14]. https://www.paper.edu.cn/releasepaper/content/201812-43.

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论文编号	201812-43
论文题目	多孔二氧化硅填充环氧树脂复合材料的力学性能和机理研究
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