Characteristics and properties of SiO2-Al2O3/EP-PU composite
来源期刊：中南大学学报(英文版)2014年第11期
论文作者：CHEN Yu-fei(陈宇飞) DAI Qi-wang(代起望) LIN Cai-wei(林彩威) FENG Tao(冯涛)
文章页码：4076 - 4083
Key words：nano-SiO2; nano-Al2O3; epoxy resin; polyurethane; property
Abstract: SiO2-Al2O3/EP-PU nanocomposites, which contained polyurethane (PU) flexible chain, were prepared via epoxy resin, PU and modified silica and alumina particles. Silica and alumina particles were modified by coupling agents KH-560 and KH550, respectively. EP-PU was used as matrix, PU as toughening agent, SiO2-Al2O3 as filled and MTHPA as curing agent. The mass ratio of PU was 30% in this system. The chemical structure of the products was confirmed by FT-IR measurements, the morphological structure of fracture surface and the surface of the hybrid materials were observed by scanning electron microscope (SEM) and transmission electron microscope (TEM), and shearing strength and breakdown field were measured, respectively. When the mass fraction of inorganic component was 10% and the mass ratio of SiO2 to Al2O3 was 4.5:5.5, shearing strength of SiO2-Al2O3/EP-PU was 28.5 MPa and breakdown field was 15 kV/mm, the data could meet the property requirement of insulating material.
CHEN Yu-fei(陈宇飞)1, 2, DAI Qi-wang(代起望)2, LIN Cai-wei(林彩威)2, FENG Tao(冯涛)2
(1. Key Laboratory of Engineering Dielectrics and Its Application of Ministry of Education
(Harbin University of Science and Technology), Harbin 150080, China;
2. College of Materials Science and Engineering,
Harbin University of Science and Technology, Harbin 150040, China)
Abstract:SiO2-Al2O3/EP-PU nanocomposites, which contained polyurethane (PU) flexible chain, were prepared via epoxy resin, PU and modified silica and alumina particles. Silica and alumina particles were modified by coupling agents KH-560 and KH550, respectively. EP-PU was used as matrix, PU as toughening agent, SiO2-Al2O3 as filled and MTHPA as curing agent. The mass ratio of PU was 30% in this system. The chemical structure of the products was confirmed by FT-IR measurements, the morphological structure of fracture surface and the surface of the hybrid materials were observed by scanning electron microscope (SEM) and transmission electron microscope (TEM), and shearing strength and breakdown field were measured, respectively. When the mass fraction of inorganic component was 10% and the mass ratio of SiO2 to Al2O3 was 4.5:5.5, shearing strength of SiO2-Al2O3/EP-PU was 28.5 MPa and breakdown field was 15 kV/mm, the data could meet the property requirement of insulating material.
Key words:nano-SiO2; nano-Al2O3; epoxy resin; polyurethane; property
