scholarly journals Damping Augmentation of Nanocomposites Using Carbon Nanofiber Paper

2006 ◽  
Vol 2006 ◽  
pp. 1-7 ◽  
Author(s):  
Jihua Gou ◽  
Scott O'Braint ◽  
Haichang Gu ◽  
Gangbing Song
Keyword(s):  
Carbon Nanofibers ◽  
Composite Laminates ◽  
Carbon Nanofiber ◽  
Glass Fibers ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Glass Fiber Reinforced ◽  
Short Glass ◽  
Vartm Process

Vacuum-assisted resin transfer molding (VARTM) process was used to fabricate the nanocomposites through integrating carbon nanofiber paper into traditional glass fiber reinforced composites. The carbon nanofiber paper had a porous structure with highly entangled carbon nanofibers and short glass fibers. In this study, the carbon nanofiber paper was employed as an interlayer and surface layer of composite laminates to enhance the damping properties. Experiments conducted using the nanocomposite beam indicated up to 200–700% increase of the damping ratios at higher frequencies. The scanning electron microscopy (SEM) characterization of the carbon nanofiber paper and the nanocomposites was also conducted to investigate the impregnation of carbon nanofiber paper by the resin during the VARTM process and the mechanics of damping augmentation. The study showed a complete penetration of the resin through the carbon nanofiber paper. The connectivities between carbon nanofibers and short glass fibers within the carbon nanofiber paper were responsible for the significant energy dissipation in the nanocomposites during the damping tests.

Damping Enhancement of Hybrid Nanocomposites Embedded With Engineered Carbon Nanopaper

Aerospace ◽  
2006 ◽  
Author(s):  
J. Gou ◽  
S. Sumerlin ◽  
H. C. Gu ◽  
G. Song
Keyword(s):  
Carbon Nanofibers ◽  
Composite Laminates ◽  
Carbon Nanofiber ◽  
Glass Fibers ◽  
Cost Effective ◽  
Hybrid Nanocomposites ◽  
Structural Vibration ◽  
Damping Properties ◽  
Structural Damping ◽  
Short Glass

This paper presents a novel process to manufacture multifunctional and cost-effective hybrid nanocomposites through integrating engineered carbon nanofiber paper into traditional fiber reinforced composites to improve structural damping properties. In this study, carbon nanofibers are vapor grown carbon fibers, which are grown catalytically from gaseous hydrocarbons using metallic catalyst particles. Vapor grown carbon nanofibers are much less costly than single-walled and multi-walled carbon nanotubes. Carbon nanofibers were preformed as a nanopaper which had a porous structure with highly entangled carbon nanofibers and short glass fibers. The vacuum-assisted resin transfer molding (VARTM) process was used to fabricate the nanocomposites by using engineered carbon nanofiber paper as inter-layer or surface layer of traditional composite laminates. To characterize the structural damping properties, the influence of frequency dependence was analyzed through the experiments conducted using the nanocomposite beams. It was found that there is up to 200-700% increase of the damping ratios at higher frequencies. In addition, experiments were also performed to study the interface characteristics between the carbon nanofiber paper and the laminate ply. The study showed a complete penetration of the resin through the carbon nanofiber paper. It was found that the connectivities between carbon nanofibers and short glass fibers within the carbon nanofiber paper were responsible for the significant energy dissipation in the hybrid nanocomposites during the structural vibration applications. The research results confirm the possible advantage of using engineered carbon nanofiber for damping augmentation.

Rheological properties of grafted maleic anhydride based polypropylene composites filled with organoclay and glass fibers

e-Polymers ◽  
2007 ◽  
Vol 7 (1) ◽  
Author(s):  
Seung Hwan Lee ◽  
Jae Ryoun Youn
Keyword(s):  
Glass Fiber ◽  
Rheological Properties ◽  
Glass Fibers ◽  
Layered Silicate ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Silicate Nanocomposites ◽  
Glass Fiber Reinforced ◽  
Polypropylene Matrix

AbstractExfoliated polypropylene/layered silicate nanocomposites and chopped glass fiber reinforced composites were prepared by a melt compounding process using maleic anhydride modified polypropylene (PP-g-MAH). The effect of fillers on morphological and rheological properties in melt mixing of polypropylene matrix with compatibilizer was investigated and compared with various measurements. It was observed that polypropylene/layered silicate nanocomposites exhibited remarkable reinforcement compared with the conventional composites filled with glass fibers which were dispersed at micrometer scale. The nanocomposites had larger storage modulus at low frequency region and outstanding strain hardening behavior than those of pure polypropylene or glass fiber reinforced composites. It was shown that glass fiber reinforced composites had lower elastic properties and steady state elongational viscosities than pure polypropylene melt. Contrary to glass fiber reinforced composites, it was confirmed that 3-dimensional network structure due to strong intermolecular bonding between polypropylene matrix and layered silicates affected particular rheological properties of nanocomposites.

FT-IR Microspectroscopic Investigation of the Interphase of Epoxy Resin-Glass Fiber-Reinforced Composites

1996 ◽  
Vol 50 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Constantinos D. Arvanitopoulos ◽  
Jack L. Koenig
Keyword(s):  
Glass Fiber ◽  
Glass Fibers ◽  
Fiber Reinforced Composites ◽  
Interfacial Region ◽  
Reinforced Composites ◽  
Glass Fiber Reinforced ◽  
Different Types ◽  
Ft Ir ◽  
Ir Microspectroscopy ◽  
Dimensional Mapping

Glass fiber-epoxy with composites were analyzed with the use of FT-IR microspectroscopy. With the use of spectral subtraction along with two-dimensional mapping experiments, spectral features characteristic of the interfacial region were revealed. Different types of glass fibers were used in order to observe spectral differences at the interphase. When as-received and heat-cleaned glass fibers were used, certain similarities were observed, although an inhibition of the curing seems to be taking place at the interfacial region of epoxy-heat-cleaned glass fibers. When the glass fibers were treated with an aminosilane coupling agent (γ-APS), there was spectral evidence that the glass surface was modifying the epoxy-glass fiber interphase.

Structural Damping Enhancement of Nanocomposites With Engineered Vapor Grown Carbon Nanofiber Paper

2006 ◽  
Author(s):  
Jihua Gou ◽  
Haichang Gu ◽  
Gangbing Song
Keyword(s):  
Carbon Nanotubes ◽  
Energy Dissipation ◽  
Carbon Nanofibers ◽  
Composite Laminates ◽  
Carbon Nanofiber ◽  
Glass Fibers ◽  
Hybrid Nanocomposites ◽  
Structural Vibration ◽  
Damping Properties ◽  
Structural Damping

Due to their nanometer size and low density, the surface area to mass ratio of carbon nanotubes and carbon nanofibers is extremely large. In addition, the large aspect ratio and high elastic modulus of carbon nanotubes and carbon nanofibers allow for large differences in strain between the constituents in the nanocomposites, which could enhance the interfacial energy dissipation ability. While there are many reported benefits of carbon nanotubes and carbon nanofibers in the nanocomposites, the potential of carbon nanotubes and carbon nanofibers to enhance the structural damping properties of nanocomposites has not been fully explored. This paper presents a novel process to manufacture multifunctional and cost-effective hybrid nanocomposites through integrating engineered carbon nanofiber paper into traditional fiber reinforced composites to improve the structural damping properties. The vacuum-assisted resin transfer molding (VARTM) process was employed to fabricate the nanocomposites by using engineered carbon nanofiber papers as inter-layers or surface layers of traditional composite laminates. To characterize the structural damping properties, the influence of frequency dependence was analyzed through the experiments conducted using the nanocomposite beams. It was found that there is up to 200–700% increase of the damping ratios at higher frequencies. It was found that the connectivities between carbon nanofibers and short glass fibers within the carbon nanofiber paper were responsible for the significant energy dissipation in the nanocomposites during structural vibration applications.

Sign in / Sign up

Export Citation Format

Share Document