多巴胺修饰氮化硼对环氧树脂复合材料性能的影响

doi:10.11896/cldb.18100049

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Abstract For the sake of enhancing the stress load transfer between boron nitride (BN) and epoxy (EP) matrix, amino groups and hydroxyl groups were introduced on the surface of BN through co-deposition of dopamine (DA) and polyethyleneimine (PEI). The chemical bonds formed between the amine functional groups on the BN surface and the epoxy resin during curing provided strong sheet/matrix interfacial adhesion, and improved the dispersion of BN in EP matrix. Thermogravimetric analyzer (TGA), Fourier transform infrared spectrometer (FTIR), X-ray photoelectron spectroscope (XPS) and field emission scanning electron microscope (FSEM) were employed to characterize the structure and morpho-logy of the modified BN. Furthermore, the effect of addition of BN and modified BN on the tensile strength, fracture toughness (KIC) and thermal stability were investigated. The results demonstrated that the introduction of DA-PEI modified BN greatly contributed to enhancing the thermal stability and dynamic mechanical properties. Specifically, epoxy composite containing 1wt% of BN-DA-PEI nanosheets showed a remarkable improvement in tensile strength, elongation at break and KIC by 43.3%, 30.8% and 129.7%, respectively. Meanwhile, the EP/BN-DA-PEI composite showed an sharp increase of 1 063 MPa in storage modulus compared to pure PE, as well as an increase of glass transition temperature (T_g) from 167 ℃ to 178 ℃.

Key words： epoxy resin boron nitride dopamine polyethyleneimine

Published: 16 September 2019

CLC number:

TQ317

About author:: Nan Wangwas born in 1995, received her B.S. degree in Chemistry from Sichuan University of Arts and Science in 2017. She is currently pursuing her M.S. degree at School of Materials Science and Engineering, Southwest University of Science and Technology under the supervision of Prof. Jichuan Huo. Her research interests are in two-dimensional material modification, preparation, characterization and application of high performance epoxy resin.
Jichuan Huo, professor and supervisor in Southwest University of Science and Technology. He is currently the Director of the Analysis and Testing Center of Southwest University of Science and Technology. He received M.S. degree from Changchun Institute of Applied Chemistry Chinese Academy of Sciences. His research interests are in surface (boundary) modification of nano-materials, fiber materials and functional compo-sites, and he has about 200 publications.

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	WANG Nan
	HU Chengyao
	GUO Shiyan
	LIAO Jun
	HUO Jichuan

Cite this article:

WANG Nan,HU Chengyao,GUO Shiyan, et al. Impact of Dopamine Modified Boron Nitride on the Properties of Epoxy Resin Composites[J]. Materials Reports, 2019, 33(22): 3837-3841.

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http://www.mater-rep.com/EN/10.11896/cldb.18100049 OR http://www.mater-rep.com/EN/Y2019/V33/I22/3837

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