How a bio-based epoxy monomer enhanced the properties of diglycidyl ether of bisphenol A (DGEBA)/graphene composites
How a bio-based epoxy monomer enhanced the properties of diglycidyl ether of bisphenol A (DGEBA)/graphene composites
复制标题
生物基环氧单体如何增强双酚 A 二缩水甘油醚 (DGEBA)/石墨烯复合材料的性能
DOI：
10.1039/c3ta01700a
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发表时间：
2013-01-01
影响因子：
11.9
通讯作者：
Zhu, Jin
中科院分区：
文献类型：
--
作者：
Cao, Lijun;Liu, Xiaoqing;Zhu, Jin
以可再生没食子酸为原料，合成了一种生物基环氧单体GA-II。拉曼光谱和紫外光谱表明，所含的芳香族基团使其能够通过强的p-p相互作用被吸附到石墨烯表面。GA-II固定的石墨烯很容易均匀分散在环氧树脂中。固化后的石墨烯/环氧复合材料具有良好的力学性能、良好的导热性能和较高的导电性。加入2wt%GA-II/石墨烯后，复合材料的拉伸强度、拉伸模量、弯曲强度和弯曲模量分别提高了27%、47%、9%和21%。热导率和电导率分别提高了12倍(从0.15提高到1.8W·m(-1)K~(-1))和8个数量级(从7.0×10~(-15)提高到3.28×10~(-5)S厘米(-1))。这为我们提供了一种高效的环境友好型石墨烯分散剂，为制备性能优异的环氧树脂/石墨烯复合材料提供了一种有效的方法。
A bio-based epoxy monomer (GA-II) was synthesized from renewable gallic acid. The aromatic group contained made it capable of being absorbed onto the surface of graphene via strong p-p interactions, which was proven by Raman spectra and UV spectra. The GA-II anchored graphene was easily homogeneously dispersed in the epoxy resin. After solidification, the graphene/epoxy composites demonstrated superior performances in terms of good mechanical properties, excellent thermal conductivity, as well as high electrical conductivity. With the addition of only 2 wt% GA-II/graphene, the tensile strength, tensile modulus, flexural strength and flexural modulus of the composites were improved by 27%, 47%, 9% and 21%, respectively. The thermal and electrical conductivities were also improved by 12-fold (from 0.15 to 1.8 W m(-1) K-1) and 8 orders (from 7.0 x 10(-15) to 3.28 x 10(-5) s cm(-1)), respectively. This work provided us with an environmentally friendly agent with high efficiency for graphene dispersion and demonstrated an efficient method for fabricating epoxy/graphene composites with superior properties.