Characterization of textile-grade carbon fiber polypropylene composites

In this work, we consider low-cost carbon fiber produced with a textile-grade precursor. The objective of the study is to investigate textile-grade carbon-fiber-reinforced-polypropylene composites (TCF-PP) from compounded pellets for mechanical and thermal characterization. Four sets of pellets with 1%, 5%, 10%, and 15% reinforcement were manufactured using textile-grade carbon fiber (TCF) and polypropylene (PP) by twin-screw compounding. The addition of TCFs through gravimetric feeder directly in the extruder resulted in lower fiber content; however, side feeder has shown good potential. The pellets were further processed in extrusion compression molding to manufacture plaques. An increase in fiber loading has a negligible effect on fiber attrition as fiber length distribution variation between 1% and 15% reinforced pellets was very small. The addition of TCFs in PP showed a significant improvement in mechanical properties. The tensile strength and modulus of the composite were 26% and 161%, respectively, improved by the addition of 10 wt% TCF. Similar results were observed in the flexure test. However, the impact properties were reduced by 25.54% by the addition of 15% TCF.

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Effects of initial fiber length and fiber length distribution on the properties of carbon-fiber-reinforced-polypropylene composites

Journal of Reinforced Plastics and Composites ◽

10.1177/0731684412452678 ◽

2012 ◽

Vol 31 (15) ◽

pp. 1053-1060 ◽

Cited By ~ 29

Author(s):

Nevin Gamze Karsli ◽

Ayse Aytac ◽

Veli Deniz

Keyword(s):

Carbon Fiber ◽

Fiber Length ◽

Length Distribution ◽

Fiber Reinforced ◽

Polypropylene Composites ◽

Fiber Length Distribution ◽

Carbon Fiber Reinforced ◽

Initial Fiber

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Mechanical and thermal characterization of grafted PP-NCC nanocomposites

Journal of Thermoplastic Composite Materials ◽

10.1177/0892705719878226 ◽

2019 ◽

pp. 089270571987822

Author(s):

Saud Aldajah ◽

Mohammad Y Al-Haik ◽

Waseem Siddique ◽

Mohammad M Kabir ◽

Yousef Haik

Keyword(s):

Thermal Properties ◽

Interfacial Adhesion ◽

Thermal Characterization ◽

Mechanical And Thermal Properties ◽

Screw Extruder ◽

Scanning Calorimetry ◽

Three Point Bending ◽

Twin Screw ◽

Thermal Stability Of

This study reveals the enhancement of mechanical and thermal properties of maleic anhydride-grafted polypropylene (PP- g-MA) with the addition of nanocrystalline cellulose (NCC). A nanocomposite was manufactured by blending various percentages of PP, MA, and NCC nanoparticles by means of a twin-screw extruder. The influence of varying the percentages of NCC on the mechanical and thermal behavior of the nanocomposite was studied by performing three-point bending, nanoindentation, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and Fourier-transform infrared (FTIR) spectroscopy tests. The novelty of this study stems on the NCC nanoparticles and their ability to enhance the mechanical and thermal properties of PP. Three-point bending and nanoindentation tests revealed improvement in the mechanical properties in terms of strength, modulus, and hardness of the PP- g-MA nanocomposites as the addition of NCC increased. SEM showed homogeneity between the mixtures which proved the presence of interfacial adhesion between the PP- g-MA incorporated with NCC nanoparticles that was confirmed by the FTIR results. DSC and TGA measurements showed that the thermal stability of the nanocomposites was not compromised due to the addition of the coupling agent and reinforced nanoparticles.

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Effects of A, B, and S components on fiber length distribution, mechanical, and impact properties of carbon fiber/ ABS composites produced by different processing methods

Journal of Applied Polymer Science ◽

10.1002/app.50674 ◽

2021 ◽

Vol 138 (28) ◽

pp. 50674

Author(s):

Heesook Lee ◽

Donghwan Cho

Keyword(s):

Carbon Fiber ◽

Fiber Length ◽

Length Distribution ◽

Processing Methods ◽

Impact Properties ◽

Fiber Length Distribution

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Low-cost optical instrumentation for thermal characterization of MEMS

Measurement Science and Technology ◽

10.1088/0957-0233/16/9/016 ◽

2005 ◽

Vol 16 (9) ◽

pp. 1833-1840 ◽

Cited By ~ 13

Author(s):

S Jorez ◽

J Laconte ◽

A Cornet ◽

J-P Raskin

Keyword(s):

Low Cost ◽

Thermal Characterization ◽

Optical Instrumentation

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Carbon Fiber Based Twisted and Coiled Artificial Muscles (TCAMs) for Powered Ankle-Foot Orthoses (AFO)

Journal of Biomechanical Engineering ◽

10.1115/1.4051927 ◽

2021 ◽

Author(s):

Parth Kotak ◽

Jason Wilken ◽

Kirsten Anderson ◽

Caterina Lamuta

Keyword(s):

Carbon Fiber ◽

Low Cost ◽

Input Voltage ◽

Input Power ◽

Artificial Muscles ◽

Specific Work ◽

Foot Orthoses ◽

Ankle Foot Orthoses ◽

Low Cost Manufacturing

Abstract Ankle foot orthoses (AFOs) control the position and motion of the ankle, compensate for weakness, and correct deformities. AFOs can be classified as passive or powered. Powered AFOs overcome the limitations of passive AFOs by adapting their performance to meet a variety of requirements. However, the actuators currently used to power AFOs are typically heavy, bulky, expensive, or limited to laboratory settings. Thus, there is a strong need for lightweight, inexpensive, and flexible actuators for powering AFOs. In this technical brief, Carbon Fiber/Silicone Rubber (CF/SR) Twisted and Coiled Artificial Muscles (TCAMs) are proposed as novel actuators for powered AFOs. CF/SR TCAMs can lift up to 12,600 times their weight with an input power of only 0.025 W cm-1 and are fabricated from inexpensive materials through a low-cost manufacturing process. Additionally, they can provide a specific work of 758 J kg-1 when an input voltage of 1.64 V cm-1 is applied. A mechanical characterization of CF/SR TCAMs in terms of length/tension, tension/velocity, and active-passive length/tension is presented, and results are compared with the performance of skeletal muscles. A gait analysis demonstrates that CF/SR TCAMs can provide the performance required to supplement lower limb musculature and replicate the gait cycle of a healthy subject. Therefore, the preliminary results provided in this brief are a stepping stone for a dynamic AFO powered by CF/SR TCAMs.

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Structure and Mechanical Behavior of Isotactic Polypropylene Composites Filled with Silver Nanoparticles

e-Polymers ◽

10.1515/epoly.2007.7.1.1618 ◽

2007 ◽

Vol 7 (1) ◽

Cited By ~ 4

Author(s):

Sie Chin Tjong ◽

Suping Bao

Keyword(s):

Mechanical Behavior ◽

Isotactic Polypropylene ◽

Ag Nanoparticles ◽

Screw Extruder ◽

Additional Increase ◽

Polypropylene Composites ◽

Melt Compounding ◽

Twin Screw ◽

Izod Impact ◽

The Impact

AbstractIsotactic polypropylene (PP) nanocomposites containing 0.1, 0.3, 0.5 and 1.0 wt % silver (Ag) nanoparticles were prepared via melt compounding in a twin-screw extruder followed by injection molding The effects of the Ag nanoparticle additions on the structure and mechanical behavior of PP were studied using DSC, WXRD, optical microscopy, tensile and Izod impact techniques. DSC and WXRD measurements showed that the addition of only 0.1 wt% Ag nanoparticles promote the formation of β-form PP. Further increasing Ag content would not lead to additional increase of the β-PP phase content. The induced β- form PP phase is beneficial to enhance the impact strength and tensile ductility of the PP/Ag nanocomposites.

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Study on the Characterization of Cotton Fiber Length Distribution

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.821-822.398 ◽

2013 ◽

Vol 821-822 ◽

pp. 398-401 ◽

Cited By ~ 1

Author(s):

Xue Qin Kuang ◽

Jian Ping Yang ◽

Chong Wen Yu

Keyword(s):

Probability Density Function ◽

Weibull Distribution ◽

Cotton Fiber ◽

Fiber Length ◽

Mixed Model ◽

Length Distribution ◽

Length Frequency ◽

Fiber Length Distribution ◽

Two Component

In order to characterize cotton fiber length distribution, the probability density function with parameters were used to describe the fiber length frequency histograms. In this paper, four cotton fiber samples (bale, carded sliver, combed sliver and finisher sliver) were selected, and the fiber histograms by weight were measured by USTER AFIS Pro. Two- and three-component mixed Weibull distributions were adopted by us to fit these histograms, and the relevant fiber length measures were calculated. The results showed that mixed model could well describe the entire fiber length distribution of different cotton fiber samples, and two-component mixed Weibull distribution, rather than three-component one, fitted these histograms better.

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On-Body Characterization of Planar Differential Antennas for Multiple, Wide, and Narrow Bands

International Journal of Antennas and Propagation ◽

10.1155/2016/7439403 ◽

2016 ◽

Vol 2016 ◽

pp. 1-9

Author(s):

Luigi Vallozzi ◽

Domenico Pepe ◽

Thijs Castel ◽

Hendrik Rogier ◽

Domenico Zito

Keyword(s):

Human Body ◽

Ad Hoc ◽

Low Cost ◽

Experimental Tests ◽

Body Measurements ◽

Antenna Performance ◽

Sensing Applications ◽

The Impact ◽

Narrow Bands

This paper reports the results of the on-body experimental tests of a set of four planar differential antennas, originated by design variations of radiating elements with the same shape and characterized by the potential for covering wide and narrow bands. All the antenna designs have been implemented on low-cost FR4 substrate and characterized experimentally through on-body measurements. The results show the impact of the proximity to the human body on antenna performance and the opportunities in terms of potential coverage of wide and narrow bands for future ad hoc designs and implementations through wearable substrates targeting on-body and off-body communication and sensing applications.

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