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a b s t r a c t A high intensity ultrasonic liquid processor was used to infuse 0.1–0.4 wt.% car... more a b s t r a c t
A high intensity ultrasonic liquid processor was used to infuse 0.1–0.4 wt.% carbon nanofibers (CNFs) into
the polyester matrix which was then mixed with a catalyst using a high speed mechanical agitator. Both
conventional and nanophased glass fiber reinforced polyester composites (GRPCs) were fabricated using
the vacuum assisted resin transfer molding (VARTM) process. Scanning electron microscope (SEM)
revealed best dispersion of CNFs in the 0.2 wt.% CNF-loaded resin. Proper resin flow and impregnation
of the glass fibers were also seen in the SEM micrographs. DMA studies exhibited about 49.5% increase
in the storage modulus and about 3 C increase in the glass transition temperature (Tg) due to the incorporation
of CNFs into the GRPC. TMA studies also showed better thermal stability and lower thermal
expansion in the CNF-loaded GRPC. CNF-loaded GRPC showed higher ILSS due to better interfacial
bonding between the fiber and matrix due to the presence of CNFs. Fracture morphology studied by both
optical microscope (OM) and SEM revealed better interfacial bonding in the CNF-loaded GRPC.
... Hassan Mahfuz 1 , Mujibur R. Khan 1 , Ashfaq Adnan 2 , Mohammad M. Hasan 3 , ... [7] Kuriger ... more ... Hassan Mahfuz 1 , Mujibur R. Khan 1 , Ashfaq Adnan 2 , Mohammad M. Hasan 3 , ... [7] Kuriger RJ, Alam MK, Anderson DP, Jacobsen RL, Processing and characterization of aligned vapor grown fiber reinforced polypropylene, Composites: Part A, 2002; 33: 53-62. ...
Volume 8: Mechanics of Solids, Structures and Fluids; Vibration, Acoustics and Wave Propagation, 2011
ABSTRACT In this study, a high-intensity ultrasonic liquid processor was used to obtain a homogen... more ABSTRACT In this study, a high-intensity ultrasonic liquid processor was used to obtain a homogeneous molecular mixture of epoxy resin and carbon nano fiber. The carbon nano fibers were infused into the part A of SC-15 (diglycidylether of Bisphenol A) through sonic cavitations and then mixed with part B of SC-15 (cycloaliphatic amine hardener) using a high-speed mechanical agitator. The trapped air and reaction volatiles were removed from the mixture using high vacuum. Nanophased epoxy with 2 wt.% CNF was then utilized in a vacuum assisted resin transfer molding (VARTM) set up with carbon fabric to fabricate laminated composites. The effectiveness of CNF addition on matrix dominated properties of composites has been evaluated by compression, open hole compression and inter-laminar shear. The compression strength, open hole compression strength and ILS were improved by 21%, 23% and 15%, respectively as compared to the neat composite.
Volume 10: Mechanics of Solids and Structures, Parts A and B, 2007
ABSTRACT
IUTAM Symposium on Multi-Functional Material Structures and Systems, 2009
Effects of various functionalized multi-walled carbon nanotubes (MWCNT) on cure kinetics and flex... more Effects of various functionalized multi-walled carbon nanotubes (MWCNT) on cure kinetics and flexural properties of an epoxy based nanocomposite system were investigated. Chemical functionalization of MWCNT by oxidation (MWCNT-COOH), direct-fluorination (MWCNT-F) was confirmed by FTIR, and Raman spectroscopy. One weight percentage loading of MWCNT was used to prepare epoxy-based nanocomposites through in-situ polymerization. Curing kinetics showed that MWCNT-COOH and MWCNT-F
Materials Science and Engineering: A, 2008
In the present paper, vapor-grown carbon nanofibers were mechanically dry-mixed with polypropylen... more In the present paper, vapor-grown carbon nanofibers were mechanically dry-mixed with polypropylene powder and extruded into filaments with a single screw extruder. Then tensile tests were performed on the single filament at a strain rate range from 0.02min−1 to 2min−1. Results indicate that both neat and nanophased polypropylene were strain rate-strengthening material. The tensile modulus and yield strength both increased
Materials Science and Engineering, 1982
ABSTRACT This paper presents a study on the low-velocity impact response of sandwich panels with ... more ABSTRACT This paper presents a study on the low-velocity impact response of sandwich panels with different core structures. Sandwich panels were fabricated with neat and nanophased foam core and biaxial (±45) braided carbon fabric/SC-15 epoxy composite ...
a b s t r a c t A high intensity ultrasonic liquid processor was used to infuse 0.1–0.4 wt.% car... more a b s t r a c t
A high intensity ultrasonic liquid processor was used to infuse 0.1–0.4 wt.% carbon nanofibers (CNFs) into
the polyester matrix which was then mixed with a catalyst using a high speed mechanical agitator. Both
conventional and nanophased glass fiber reinforced polyester composites (GRPCs) were fabricated using
the vacuum assisted resin transfer molding (VARTM) process. Scanning electron microscope (SEM)
revealed best dispersion of CNFs in the 0.2 wt.% CNF-loaded resin. Proper resin flow and impregnation
of the glass fibers were also seen in the SEM micrographs. DMA studies exhibited about 49.5% increase
in the storage modulus and about 3 C increase in the glass transition temperature (Tg) due to the incorporation
of CNFs into the GRPC. TMA studies also showed better thermal stability and lower thermal
expansion in the CNF-loaded GRPC. CNF-loaded GRPC showed higher ILSS due to better interfacial
bonding between the fiber and matrix due to the presence of CNFs. Fracture morphology studied by both
optical microscope (OM) and SEM revealed better interfacial bonding in the CNF-loaded GRPC.
... Hassan Mahfuz 1 , Mujibur R. Khan 1 , Ashfaq Adnan 2 , Mohammad M. Hasan 3 , ... [7] Kuriger ... more ... Hassan Mahfuz 1 , Mujibur R. Khan 1 , Ashfaq Adnan 2 , Mohammad M. Hasan 3 , ... [7] Kuriger RJ, Alam MK, Anderson DP, Jacobsen RL, Processing and characterization of aligned vapor grown fiber reinforced polypropylene, Composites: Part A, 2002; 33: 53-62. ...
Volume 8: Mechanics of Solids, Structures and Fluids; Vibration, Acoustics and Wave Propagation, 2011
ABSTRACT In this study, a high-intensity ultrasonic liquid processor was used to obtain a homogen... more ABSTRACT In this study, a high-intensity ultrasonic liquid processor was used to obtain a homogeneous molecular mixture of epoxy resin and carbon nano fiber. The carbon nano fibers were infused into the part A of SC-15 (diglycidylether of Bisphenol A) through sonic cavitations and then mixed with part B of SC-15 (cycloaliphatic amine hardener) using a high-speed mechanical agitator. The trapped air and reaction volatiles were removed from the mixture using high vacuum. Nanophased epoxy with 2 wt.% CNF was then utilized in a vacuum assisted resin transfer molding (VARTM) set up with carbon fabric to fabricate laminated composites. The effectiveness of CNF addition on matrix dominated properties of composites has been evaluated by compression, open hole compression and inter-laminar shear. The compression strength, open hole compression strength and ILS were improved by 21%, 23% and 15%, respectively as compared to the neat composite.
Volume 10: Mechanics of Solids and Structures, Parts A and B, 2007
ABSTRACT
IUTAM Symposium on Multi-Functional Material Structures and Systems, 2009
Effects of various functionalized multi-walled carbon nanotubes (MWCNT) on cure kinetics and flex... more Effects of various functionalized multi-walled carbon nanotubes (MWCNT) on cure kinetics and flexural properties of an epoxy based nanocomposite system were investigated. Chemical functionalization of MWCNT by oxidation (MWCNT-COOH), direct-fluorination (MWCNT-F) was confirmed by FTIR, and Raman spectroscopy. One weight percentage loading of MWCNT was used to prepare epoxy-based nanocomposites through in-situ polymerization. Curing kinetics showed that MWCNT-COOH and MWCNT-F
Materials Science and Engineering: A, 2008
In the present paper, vapor-grown carbon nanofibers were mechanically dry-mixed with polypropylen... more In the present paper, vapor-grown carbon nanofibers were mechanically dry-mixed with polypropylene powder and extruded into filaments with a single screw extruder. Then tensile tests were performed on the single filament at a strain rate range from 0.02min−1 to 2min−1. Results indicate that both neat and nanophased polypropylene were strain rate-strengthening material. The tensile modulus and yield strength both increased
Materials Science and Engineering, 1982
ABSTRACT This paper presents a study on the low-velocity impact response of sandwich panels with ... more ABSTRACT This paper presents a study on the low-velocity impact response of sandwich panels with different core structures. Sandwich panels were fabricated with neat and nanophased foam core and biaxial (±45) braided carbon fabric/SC-15 epoxy composite ...