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Xinyu Fan

Other affiliations: Katholieke Universiteit Leuven
Bio: Xinyu Fan is an academic researcher from Chinese Academy of Sciences. The author has contributed to research in topics: Materials science & Ultimate tensile strength. The author has an hindex of 16, co-authored 37 publications receiving 1299 citations. Previous affiliations of Xinyu Fan include Katholieke Universiteit Leuven.

Papers
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TL;DR: An alternative method for improving the interfacial and tensile properties of carbon fiber composites by controlling the fiber-matrix interface was developed and such multiscale reinforced composites show great potential with their improved mechanical performance to be likely applied in the aerospace and automotive industries.
Abstract: The performance of carbon fiber-reinforced composites is dependent to a great extent on the properties of fiber–matrix interface. To improve the interfacial properties in carbon fiber/epoxy composites, we directly introduced graphene oxide (GO) sheets dispersed in the fiber sizing onto the surface of individual carbon fibers. The applied graphite oxide, which could be exfoliated to single-layer GO sheets, was verified by atomic force microscope (AFM). The surface topography of modified carbon fibers and the distribution of GO sheets in the interfacial region of carbon fibers were detected by scanning electron microscopy (SEM). The interfacial properties between carbon fiber and matrix were investigated by microbond test and three-point short beam shear test. The tensile properties of unidirectional (UD) composites were investigated in accordance with ASTM standards. The results of the tests reveal an improved interfacial and tensile properties in GO-modified carbon fiber composites. Furthermore, significa...

561 citations

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TL;DR: In this paper, a facile approach to fabricate graphene oxide reinforced epoxy resin nanocomposites was developed by transferring GO from water to acetone, which showed significant improvements in flexural strength, flexural modulus, impact strength, and storage modulus.
Abstract: A facile approach to fabricate graphene oxide (GO) reinforced epoxy resin nanocomposites was developed by transferring GO from water to acetone. Three-point bending test, impact test, dynamic mechanical analysis (DMA) and thermogravimetric analysis (TGA) were used to investigate the mechanical and thermal properties of the nanocomposites. The results showed that significant improvements in flexural strength, flexural modulus, impact strength, and storage modulus were achieved when incorporating ∼1 wt% of graphene oxide. The TGA analysis indicated that the introduction of GO has not demonstrated obvious effect on the thermal stability.

145 citations

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TL;DR: In this paper, a new and facile route has been developed to prepare graphene oxide reinforced polyamide 6 (PA6) composites and synthesize simultaneously PA6 grafted GO hybrid materials: e-caprolactam (CL) was firstly fixed onto the GO sheets coupling by 4,4′-methylenebis(phenyl isocyanate), and then PA6 was grafted from the GO surface by in situ anionic ring-opening polymerization.
Abstract: In this study, a new and facile route has been developed to prepare graphene oxide (GO) reinforced polyamide 6 (PA6) composites and synthesize simultaneously PA6 grafted GO hybrid materials: e-caprolactam (CL) was firstly fixed onto the GO sheets coupling by 4,4′-methylenebis(phenyl isocyanate), and then PA6 was grafted from the GO surface by in situ anionic ring-opening polymerization. The polymerization processing was effectively carried out at relatively low reaction temperature (150 °C) and in a short reaction time (20 to 40 min) by using a caprolactam magnesium bromide (C1) initiator in combination with a difunctional hexamethylene-1,6-dicarbamoylcaprolactam (C20) activator. The PA6 grafted graphene oxide (g-GO) was verified by 1H NMR, FTIR, TGA, XPS and AFM. The PA6 grafted GO sheets (g-GO) contain about 74 wt% polymers, which make the GO sheets homogenously dispersed in matrix and gain good interfacial adhesion. The tensile results show that the tensile strength and Young's modulus of the nanocomposites can be obviously improved by incorporation of g-GO at low contents. Furthermore, the crystallization temperature and degree of crystallinity of PA6-GO nanocomposites both increased in the non-isothermal crystallization process, especially for the composites with GO loading less than 0.2 wt%. This simple and effective approach is believed to offer possibilities for broadening the graphene applications with the development of PA6-graphene nanocomposites.

128 citations

Journal ArticleDOI
Kang Tao1, Juan Li1, Liang Xu1, Xiulan Zhao1, Lixin Xue1, Xinyu Fan1, Qing Yan1 
TL;DR: In this paper, a novel phosphazene cyclomatrix network polymer poly(cyclotriphosphazene- co - pentaerythritol) (PCPP) was synthesized and characterized based on an attempt to look for a high efficient and green intumescent flame retardant.

98 citations

Journal ArticleDOI
TL;DR: Experiments proved that the high current-carrying capacity of microscale nanotube array samples improved to 10(6) A cm(-2) due to increased heat dissipation through the substrate, and a finite-element model based on Joule heating and heat convection was used to explain this relationship.
Abstract: Buckypapers (BPs) are thin films made up of carbon nanomaterials, such as single-walled carbon nanotubes (SWCNTs) or mixtures of SWCNTs with multi-walled carbon nanotubes (MWCNTs) or vapor-grown carbon nanofibers (VGCNFs). In this research, BPs were exposed to high electrical current densities under different environments, and the effects on nanotube and BP breakdown were observed. In ambient conditions, SWCNT BP breakdown happened at around 430 °C with a flash of light. Mixed BPs of SWCNTs/MWCNTs and SWCNTs/VGCNFs showed higher ignition temperatures of over 500 °C. The results were compared to those from thermogravimetric analysis. In a vacuum, current-driven thermal heating from the samples can generate temperatures greater than 2000 °C. The breakdown current density increased to more than three times that in open air. The breakdown current density of a BP sample increased proportionally to its conductivity. A finite-element model based on Joule heating and heat convection was used to explain this relationship. Further experiments also proved that the high current-carrying capacity of microscale nanotube array samples improved to 106 A cm−2 due to increased heat dissipation through the substrate.

68 citations


Cited by
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TL;DR: In this paper, the current status of the intrinsic mechanical properties of the graphene-family of materials along with the preparation and properties of bulk graphene-based nanocomposites is thoroughly examined.

1,531 citations

Journal ArticleDOI
TL;DR: In this article, the fundamental design principles of highly thermally conductive composites were discussed and the key factors influencing the thermal conductivity of polymers, such as chain structure, crystallinity, crystal form, orientation of polymer chains, and orientation of ordered domains in both thermoplastics and thermosets were addressed.

1,359 citations

Journal ArticleDOI
01 Apr 2014-Carbon
TL;DR: In this paper, the surface functionalization of DGEBA layer was found to effectively improve the compatibility and dispersion of GO sheets in epoxy matrix, and increased glass transition temperature and thermal stability was also observed in the dynamic mechanical properties and thermo-gravimetric analysis.

648 citations

01 Jan 1985

626 citations

Journal ArticleDOI
TL;DR: In this article, the authors provide a systematic and up-to-date account of various carbon fiber surface modification techniques, i.e., sizing, plasma, chemical treatments and carbon nano-tubes/nanoparticles coating, for increasing the wettability and interfacial adhesion with polymeric matrices.

552 citations