We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
表面氨基链修饰氧化石墨烯对DGEBA/3,3'- DDS环氧树脂涂层力学性能影响的研究.
- Authors
孙伟松; 于思荣; 徐坤山; 刘林; 张凯; 夏渊
- Abstract
The properties of DGEBA/3,3'-DDS epoxy resin coatings modified by graphene with different surface structures were studied by molecular dynamics simulation and experimental tests. Firstly, the different models of composites were established by Materials Studio 2019 software. Based on molecular dynamics simulation, the variation rules of cohesive energy density, mechanical properties and deformation quantity of the composite system under different temperature were studied to determine the composite system with the best mechanical properties. Secondly, the surface morphology and mechanical properties of the pure epoxy resin and amino modified GO/epoxy resin coating were tested by means of scanning electron microscopy and mechanical properties testing. The results show that the cohesive energy density and mechanical properties of epoxy resin system are effectively improved with the graphene components doped. With the system temperature increased, the values show a decreasing trend. When the temperature is 200K, the mechanical properties of the NH-GO/epoxy resin composite system are the best, and the maximum value of cohesive energy density is 4.394x108 J・m-1 The deformation quantity of the four composites increased with the increase of system temperature. They are in the compression state at low temperature (T<350 K) and in the expansion state at high temperature (T>350 K). The deformation of epoxy resin materials doped the surface amino modified GO are decreased effectively at high temperature. The surface of epoxy resin coating modified by NH-GO is more smooth and compact, and the particle size is more uniform. The mechanical properties of the DGEBA/3,3' -DDS epoxy resin coating can be effectively improved by doping the reinforcing GO modified by surface amino group.
- Publication
Coatings & Protection / Tuceng yu Fanghu, 2021, Vol 42, Issue 11, p38
- ISSN
2096-8639
- Publication type
Article