scholarly journals Mechanical and Physical Properties of Short Carbon Fiber and Nanofiller-Reinforced Polypropylene Hybrid Nanocomposites

Polymers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 2851
Author(s):  
Harri Junaedi ◽  
Muneer Baig ◽  
Abdulsattar Dawood ◽  
Essam Albahkali ◽  
Abdulhakim Almajid
Keyword(s):  
Carbon Fiber ◽  
Physical Properties ◽  
Hybrid Composites ◽  
Flexural Modulus ◽  
Hybrid Nanocomposites ◽  
Flow Index ◽  
Filler Materials ◽  
Short Carbon Fiber ◽  
Mechanical And Physical Properties ◽  
Short Carbon

The effect of various combinations of filler materials on the performance of polypropylene (PP)-based composites was investigated. PP in particulate form was used as the matrix. Milled short carbon fiber (SCF) micro-size, graphite nano-platelet (GNP), and titanium dioxide nanoparticles (nTiO2) were used as fillers. These fillers were incorporated in the polymer matrix to produce mono-filler (PP/SCF and PP/nanofiller) and hybrid composites. Hybrid composites consist of PP/10SCF/GNP, PP/10SCF/nTiO2, and PP/10SCF/GNP/nTiO2. The effect of the addition of SCF, GNP, and nTiO2 on PP-based composites was investigated by analyzing their morphological, mechanical, and physical properties. The addition of mono-filler to the PP matrix improved the mechanical properties of the composites when compared to the neat PP. The ultimate tensile strength (UTS), flexural modulus, flexural strength, and impact toughness of the hybrid composites with 15 wt % total loading of fillers, were higher than that of mono-filler composites with 15 wt % SCF (PP/15SCF). A maximum increase of 20% in the flexural modulus was observed in the hybrid composite with 10 wt % of SCF with the additional of 2.5 wt % GNP and 2.5 wt % nTiO2 when compared to PP/15SCF composite. The addition of 2.5 wt % nTiO2 to the 10 wt % SCF reinforced PP, resulted in increasing the strain at break by 15% when compared to the PP/10SCF composite. A scanning electron microscope image of the PP/10SCF composite with the addition of GNP improved the interfacial bonding between PP and SCF compared with PP/SCF alone. A decrease in the melt flow index (MFI) was observed for all compositions. However, hybrid composites showed a higher decrease in MFI.

Effect of a sizing agent on short carbon fiber production with radial chopping technology

2017 ◽  
Vol 88 (15) ◽  
pp. 1745-1754 ◽  
Author(s):  
Longsheng Lu ◽  
Zhaorui Hou ◽  
Feixiang Zhang ◽  
Huilong Liu ◽  
Songmao Chen ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Physical Properties ◽  
Yield Ratio ◽  
Length Scale ◽  
Fiber Production ◽  
Short Carbon Fiber ◽  
Important Index ◽  
Fibrous Network ◽  
Manufacturing Technologies ◽  
Short Carbon

Short carbon fiber (short-CF) has been extensively used as enforcement in composites or conductors in fibrous network materials, owing to its good subsequent processing compatibility with routine manufacturing technologies. Conventionally, short-CFs were made by cutting continuous CF-tows from thousands of meters into several millimeters length scale using a radial chopping technology, mainly through sizing, drying and chopping processes in sequence. In this work, four kinds of CF-tows with different physical properties were chopped to study the effect of a sizing agent on the production of short-CFs, including product morphology and yield ratio. All experiments were conducted on polyacrylonitrile-based CFs sized by polyurethane (PU)-acetone solution. Results show that the uniformity (an important index of short-CF appearance) of short-CFs is closely related to the unit sizing weight. The yield ratio is affected by the relative sizing amount of PU coated on CF-tows. In addition, a raw CF-tow with little fiber hairiness is beneficial to increase the yield ratio of short-CFs.

Sliding wear performance of nano-SiO2/short carbon fiber/epoxy hybrid composites

Wear ◽  
2009 ◽  
Vol 266 (7-8) ◽  
pp. 658-665 ◽  
Author(s):  
Qing Bing Guo ◽  
Min Zhi Rong ◽  
Guo Liang Jia ◽  
Kin Tak Lau ◽  
Ming Qiu Zhang
Keyword(s):  
Carbon Fiber ◽  
Sliding Wear ◽  
Hybrid Composites ◽  
Wear Performance ◽  
Short Carbon Fiber ◽  
Nano Sio2 ◽  
Carbon Fiber Epoxy ◽  
Short Carbon

Mechanical Properties and Microstructure of Short Carbon Fiber Reinforced Hydroxyapatite Bio-Composite

2011 ◽  
Vol 685 ◽  
pp. 357-361 ◽  
Author(s):  
Xin Guang Wang ◽  
Wan Li Gu ◽  
Zong Wei Niu
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Fracture Surface ◽  
Mass Fraction ◽  
Flexural Modulus ◽  
Short Carbon Fiber ◽  
Hot Pressing Sintering ◽  
Surface Morphologies ◽  
Short Carbon

The short carbon fiber (Cf) reinforced hydroxyapatite (HA) bio-composite was prepared by an in-situ processing. Mechanical properties and microstructure of Cf/HA were investigated. Structures of HA was analyzed using XRD and fracture surface morphologies of bio-composite were analyzed using SEM. Result shows that grain size of HA under hot pressing sintering (1423K, 35MPa) grow up to approximately 50nm. Bio-composite exhibits excellent mechanical properties when Cfmass fraction is 3%, whose flexural strength and flexural modulus reach the maximum values of 130MPa and 36GPa which surpass common level of nature bone. SEM fracture surface morphologies of Cf/HA shows Cfcan be uniformly dispersed in the HA matrix when the mass fraction less than 6%, while when the mass fraction is11%, partial aggregation appears.

3D PRINTING OF SHORT CARBON FIBER COMPOSITES VIA FRONTAL POLYMERIZATIONMORTEZA ZIAEE

2021 ◽  
Author(s):  
MORTEZA ZIAEE ◽  
MOSTAFA YOURDKHANI
Keyword(s):  
Additive Manufacturing ◽  
Carbon Fiber ◽  
3D Printing ◽  
Flexural Modulus ◽  
Frontal Polymerization ◽  
Carbon Fiber Composites ◽  
High Porosity ◽  
Short Carbon Fiber ◽  
Thermoset Resin ◽  
Short Carbon

Additive manufacturing (AM) of polymer composites is a growing field in academic and industrial research environment. Majority of research in this field is focused on thermoplastic-based composites, as manufacturing of thermoset composites requires long cure cycles that make the additive manufacturing process quite challenging. Even though thermoplastic composites are easier to print, the ultimate performance of composites is limited by low fiber volume fraction, relatively high porosity, and low mechanical performance of host polymers. Recently, a novel curing strategy based on frontal polymerization (FP) has been developed that enables 3D printing of high-quality thermoset polymers. In this approach, a monomer solution with a gel-like viscosity is in-situ cured following the extrusion from printing nozzle by a self-sustaining reaction front. In the present work, we use dicyclopentadiene as a thermoset resin that can be frontally polymerized to a high-performance solid polymer. We add short carbon fiber reinforcements (L ~74 μm) to resin to fabricate mechanically robust 3D composite structures. Our results show that incorporation of short fibers substantially improves the flexural strength and flexural modulus of 3D-printed composites by ~50 % and ~410 %, respectively, compared to traditionally molded neat samples. Optical microscopy from the crosssection of flexural samples reveals that no voids was formed within deposition lines.

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