scholarly journals Effect of MWCNT Surface Functionalisation and Distribution on Compressive Properties of Kenaf and Hybrid Kenaf/Glass Fibres Reinforced Polymer Composites

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2522 ◽  
Author(s):  
Napisah Sapiai ◽  
Aidah Jumahat ◽  
Mohammad Jawaid ◽  
Anish Khan
Keyword(s):  
Polymer Composites ◽  
Hybrid Composites ◽  
Testing Machine ◽  
Compressive Modulus ◽  
Filament Winding ◽  
Uniaxial Compression Test ◽  
Compressive Properties ◽  
Multi Wall Carbon Nanotubes ◽  
Resin Impregnation ◽  
Reinforced Polymer

The aim of this study is to evaluate the effect of surface treated multi wall carbon nanotubes (MWCNTs) on compressive properties of the unidirectional (UD) kenaf and hybrid woven glass/UD kenaf fibre reinforced polymer composites. The MWCNTs were first treated using concentrated acid (a mix of H2SO4 and HNO3) and silane (three-aminoprophyltriethoxysilane) in order to improve the dispersion within the epoxy matrix using a high shear roll milling technique. In this study, nanomodified epoxies were prepared using 0.5, 0.75 and 1.0 wt % of pristine MWCNT (PCNT), acid treated MWCNT (ACNT) and silane treated MWCNT (SCNT). These nanomodified epoxies were then used for the fabrication of kenaf and hybrid composites using combination of filament winding and resin impregnation. The uniaxial compression test was conducted using a universal testing machine according to the ASTM D3410 standard. The morphology of fractured samples was observed and analysed using scanning electron microscopy (SEM) in order to evaluate the failure behaviour and mechanisms involved during compression. It was found that the addition of treated MWCNT (ACNT and SCNT) improved the compressive properties of kenaf and hybrid composites as compared to those of untreated-MWCNT (PCNT). The addition of 1.0 wt % of SCNT exhibited good compressive properties in both kenaf and hybrid composite systems. The compressive modulus and strength increased by 73.25% and 20.15%, respectively, for composites made of 1.0 wt % SCNT and Kenaf (1.0SCNT/K). For the hybrid composites, the compressive modulus and strength increased by 21.18% and 7.73% for composites made of 1.0 wt % SCNT filled G/K composites (1.0SCNT/G/K).

scholarly journals Electro-thermal and mechanical performance of multi-wall carbon nanotubes buckypapers embedded in fibre reinforced polymer composites for ice protection applications

2020 ◽  
Vol 54 (23) ◽  
pp. 3457-3469 ◽  
Author(s):  
Francesco Zangrossi ◽  
Fang Xu ◽  
Nick Warrior ◽  
Petros Karapappas ◽  
Xianghui Hou
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Polymer Composites ◽  
Mechanical Characteristics ◽  
Thermal Method ◽  
Multi Wall Carbon Nanotubes ◽  
Self Heating ◽  
Resin Impregnation ◽  
Reinforced Polymer ◽  
Fibre Reinforced Polymer

Several ice protection strategies have been developed to overcome the icing hazards in the aerospace industry. The electro-thermal method is one of the popular approaches to prevent ice accretion and accumulation on aircraft surfaces. Given the increasing requirement of composites on aircraft structures, metal frameworks/fibre-reinforced composites have been developed as a de-icing solution for the new generation aircraft. The present work aimed to fabricate self-heating multi-wall carbon nanotubes based composites for ice protection and to study their electro-thermal and mechanical characteristics. Carbon nanotube buckypapers (CNPs) were prepared and embedded in fibre reinforced polymer composites by two methods: pre-preg and resin impregnation. The influence of the carbon nanotube network structure on the mechanical properties and electrical characteristics of the composites was evaluated. Mechanical tests, three-point flexural test and interlaminar shear strength test demonstrated improved mechanical characteristics of the CNP based composites. De-icing performance of the composites was conducted through a heating test in a climate chamber at −20℃. The results indicated that the CNP-based composite is a promising self-heating material candidate for ice protection systems.

Thermal and Tribological Properties of Phenolic/CNT-Alumina Hybrid Composites

2013 ◽  
Vol 812 ◽  
pp. 226-230 ◽  
Author(s):  
Siti Shuhadah Mohd Saleh ◽  
Md Akil Hazizan ◽  
Ramdziah Md. Nasir ◽  
Herza Hasmi
Keyword(s):  
Polymer Composites ◽  
Tribological Properties ◽  
Vapour Deposition ◽  
Hybrid Composites ◽  
Chemical Vapour ◽  
High Strength ◽  
Thermal Constant ◽  
Reinforced Polymer ◽  
Transient Plane Source ◽  
Pin On Disk

Carbon nanotube (CNT) reinforced polymer composites are of great interest, because their superior properties can produce composite materials with high strength, light weight, and multifunctional features. In this work, the thermal and tribological properties (wear) of Phenolic/CNT-Alumina Hybrid composites were studied. The CNT-alumina hybrid (chemically hybrid) was produced via Chemical Vapour Deposition (CVD). The Phenolic/CNT-Alumina Hybrid composites were fabricated using hot mounting moulding. The tribological properties were monitored using a Ducom TR-20 pin-on-disk tester, under dry sliding conditions. The thermal conductivity was measured using the Transient Plane Source (TPS) method, using a Hot-DiskTM Thermal Constant Analyzer. The results show that CNT-Alumina hybrid enhanced the thermal and tribological properties of the polymer composites.

Mechanical Properties of GF/CF Hybrid ABS Composite by DFFIM

2016 ◽  
Author(s):  
Hisakura Yuuki ◽  
Kitahara Kenichi ◽  
Sugihara Makoto ◽  
Imajo Akihiko ◽  
Hamada Hiroyuki
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Polymer Composites ◽  
Hybrid Composites ◽  
Low Cost ◽  
Glass Fibers ◽  
Acrylonitrile Butadiene Styrene ◽  
Impact Testing ◽  
Bending Properties ◽  
Reinforced Polymer

GF reinforced polymer composites to improve the mechanical properties by increasing fiber content, but there is a limit. On the contrary, CF reinforced polymer composites are superior to the GF composites at a lower CF content in tensile and bending properties. However, CF is more expensive than GF. In this study, acrylonitrile butadiene styrene (ABS) was reinforced with single and hybrid reinforcing of glass fibers (GF) and carbon fibers (CF). The composites consisting of GF/ABS, CF/ABS and GF/CF/ABS were fabricated by direct fiber feeding injection molding (DFFIM). The reinforcing fiber was directly fed at the vent hole of the barrel in the DFFIM process. The effects of fiber Tex, fiber numbers and processing parameters on properties of the composites were investigated. Tensile, bending and Izod impact testing was conducted to compare mechanical properties of GF/ABS composites, CF/ABS composites and hybrid GF/CF/ABS composites. Morphology of the composites was observed by scanning electron microscopy. In addition, the cost advantage of each composite was compared with their mechanical properties. From the results, the addition of carbon fiber improved tensile, bending and impact properties of the hybrid composites. SEM photographs indicated that carbon fiber tended to agglomerate during the DFFIM process. The hybrid GF/CF/ABS composites presented an equivalent improvement in tensile and bending properties as compared to the CF/ABS composites. It can be noted that the low CF content was suitable for enhanced mechanical performances of the hybrid GF/CF/ABS composites. Therefore, the hybrid composites can be manufactured at a low cost as compared to the similar mechanical properties of the CF/ABS composites.

The Compressive Properties of Kevlar/Kenaf Hybrid Composites

2015 ◽  
Vol 763 ◽  
pp. 19-24 ◽  
Author(s):  
Koay Mei Hyie ◽  
Noor Haznida Bakar ◽  
Ridzuan Jazlan ◽  
A. Jumahat ◽  
Anizah Kalam
Keyword(s):  
Compressive Strength ◽  
Hybrid Composites ◽  
Fibre Orientation ◽  
Testing Machine ◽  
Outer Part ◽  
Raw Material ◽  
Stacking Sequence ◽  
Compressive Properties ◽  
Kenaf Fibre ◽  
Kenaf Fibres

Natural fibres are aimed to replace or at least to reduce the dependence of the industrial sector against low degradability of raw material. Hence, this study is performed to investigate the effect of stacking sequence and fibre orientation on the compressive properties of Kevlar/kenaf hybrid composites. Previous study suggested that treated kenaf fibres improved the fibre’s properties. Therefore, kenaf fibres was treated with NaOH of 6% concentration for 12 hours before rinsed and dried to be used in this study. The stacking sequence was varied for different weight percentage of woven Kevlar from 0 wt% to 23 wt%, while the kenaf fibres were arranged at 0° and 90° orientation, respectively. The compressive properties of the Kevlar/kenaf fibre hybrid composites were investigated using Instron Universal Testing Machine (ASTM standard D3410M). Stereo-zoom was used to identify the fibre orientation and the bonding between the fibres and matrix. For stacking sequence, the study showed that the arrangement of kenaf fibres on the middle part, “sandwiched” between Kevlar on the outer part, gave the best compressive performance. The sample in 0° orientation exhibited better compressive strength and modulus than 90° orientation. The outcome of this research has shown significant increase of compressive strength with the addition of kenaf fibre replacing the Kevlar.

Dynamic Mechanical Behavior of Fiber Reinforced Polymer Composites Embedded with ZnO Whiskers

2011 ◽  
Vol 197-198 ◽  
pp. 1532-1535 ◽  
Author(s):  
Wei Zhou ◽  
Xi Wang ◽  
Hong Bo Zhang ◽  
Ji Li Rong
Keyword(s):  
Tensile Properties ◽  
Polymer Composites ◽  
Testing Machine ◽  
Stress Transfer ◽  
Fiber Reinforced Polymer ◽  
Resin Matrix ◽  
Fiber Reinforced ◽  
Pull Out ◽  
Reinforced Polymer ◽  
Fiber Reinforced Polymer Composites

Glass fiber reinforced polymer composites were prepared by dispersing zinc oxide (ZnO) whiskers in resin matrix. Static and dynamic tensile tests of the as-prepared composites were performed by means of a universal testing machine and the split hopkinson tensile bar (SHTB), respectively. Good tensile properties, which can be affected by the strain rates, of the composites are obtained. The fracture section morphology of the composites was investigated by scanning electron microscope (SEM). The different failure of the composites under static and dynamic tension is found. The tensile properties of the composites are dominated by pull-out and fracture of fiber bundles. The influence of ZnO whiskers on the performance of composites has been discussed. ZnO whiskers, which have unique three-dimensional structures and corresponding stress transfer, contribute to the tensile properties of the composites.

scholarly journals Enhancing Longitudinal Compressive Properties of Unidirectional FRP Based on Microbuckling Compression Failure Mechanism

2018 ◽  
Vol 13 (1) ◽  
pp. 155892501801300
Author(s):  
Fangtao Ruan ◽  
Zhenzhen Xu ◽  
Dayin Hou ◽  
Yang Li ◽  
Changliu Chu
Keyword(s):  
Compressive Strength ◽  
Filament Winding ◽  
Resin Matrix ◽  
Fiber Reinforced ◽  
Compressive Properties ◽  
Uhmwpe Fiber ◽  
Compression Properties ◽  
Reinforced Polymer ◽  
Fiber Reinforced Polymer Composites ◽  
Buckling Length

In this study, a new methodology to improve the longitudinal compressive strength and modulus of ultra-high molecular weight polyethylene (UHMWPE) fiber-reinforced epoxy resin matrix is developed. The proposed method involves wrapping a UHMWPE fiber bundle with a poly-p-phenylene benzobisoxazole fiber filament using a winding method, and using these bundles to fabricate unidirectional UHMWPE fabric. UHMWPE/epoxy composites were fabricated using vacuum-assisted resin-transfer molding (VARTM), and the compression properties of the composite were evaluated and compared to investigate the effect of the filament wrapping. Improvements in the compressive modulus were achieved for filaments wound with applied tension, and when increasing the filament-winding spacing; however, the compressive strength decreased with an increase in the filament-winding spacing. Results obtained confirm that fiber microbuckling failure occurred in the composite under longitudinal compression, and that inhibiting the buckling length of the fiber improved compressive properties. These results may be useful when designing the mechanical properties of fiber-reinforced polymer composites.

Performance Evaluations of Carbon/Glass Hybrid Polymer Composites

2014 ◽  
Vol 980 ◽  
pp. 8-12 ◽  
Author(s):  
Chye Lih Tan ◽  
Azwan Iskandar Azmi ◽  
Noorhafiza Muhammad
Keyword(s):  
Glass Fiber ◽  
Polymer Composites ◽  
Mechanical Performance ◽  
Hybrid Composites ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced Polymer ◽  
Frp Composites ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced

In this work, the influence of hybrid effect on carbon and glass fiber reinforced polymer (FRP) on the mechanical performance for structural application was studied. The hybrid fiber reinforced polymer (FRP) composites made from woven E-glass and carbon fibers with epoxy resin. The FRP hybrid composites were fabricated using vacuum-assisted resin transfer moulding process, which is capable of producing constant thickness with high volume fractions of composite panels compared to that of traditional wet hand lay-up method. Mechanical performance of the FRP hybrid composites were evaluated against full carbon or glass fiber reinforced polymer composites. Important properties such as tensile strength, flexural strength and volume fraction of reinforcement were determined according to the ASTM standards. It was found that the mechanical properties of carbon-glass hybrid composites exhibited significant improvement in term of strength and strain respectively compared to that of full glass FRP composites and full carbon FRP composites.

scholarly journals Axial and Radial Compression Behavior of Composite Rocket Launcher Developed by Robotized Filament Winding: Simulation and Experimental Validation

Polymers ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 517
Author(s):  
Rajesh Mishra ◽  
Bijoy Kumar Behera ◽  
Sayan Mukherjee ◽  
Michal Petru ◽  
Miroslav Muller
Keyword(s):  
Finite Element ◽  
Composite Structures ◽  
Hybrid Composites ◽  
Computational Modelling ◽  
Filament Winding ◽  
Radial Compression ◽  
Element Analysis ◽  
Compression Behavior ◽  
Resin Impregnation ◽  
Filament Wound

The principal objective of the work is to compare among carbon-glass filament wound epoxy matrix hybrid composites with a different fiber ratio made by robotized winding processes and optimize the geometry suitable for the Rocket Propelled Grenade Launcher. ANSYS based finite element analysis was used to predict the axial as well as radial compression behavior. Experimental samples were developed by a robot-controlled filament winding process that was incorporated with continuous resin impregnation. The experimental samples were evaluated for the corresponding compressional properties. Filament wound tubular composite structures were developed by changing the sequence of stacking of hoop layers and helical layers, and also by changing the angle of wind of the helical layers while keeping the sequence constant. The samples were developed from carbon and glass filaments with different carbon proportions (0%, 25%, 50%, 75%, and 100%) and impregnated with epoxy resin. The compressional properties of the tubular composites that were prepared by filament winding were compared with the predicted axial and radial compressional properties from computational modelling using the finite element model. A very high correlation and relatively small prediction error was obtained.

Sign in / Sign up

Export Citation Format

Share Document