Effect of coupling agent content and water absorption on the mechanical properties of coir-agave fibers reinforced polyethylene hybrid composites

AbstractThis investigation is carried out to understand the effects of water absorption on the mechanical properties of hybrid phenol formaldehyde (PF) composite fabricated with Areca Fine Fibres (AFFs) and Calotropis Gigantea Fibre (CGF). Hybrid CGF/AFF/PF composites were manufactured using the hand layup technique at varying weight percentages of fibre reinforcement (25, 35 and 45%). Hybrid composite having 35 wt.% showed better mechanical properties (tensile strength ca. 59 MPa, flexural strength ca. 73 MPa and impact strength 1.43 kJ/m2) under wet and dry conditions as compared to the other hybrid composites. In general, the inclusion of the fibres enhanced the mechanical properties of neat PF. Increase in the fibre content increased the water absorption, however, after 120 h of immersion, all the composites attained an equilibrium state.

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Development of Banana/Coir Natural Fibers Reinforced Polypropylene Hybrid Composites: The Effect of MA-g-PP (Maleic Anhydride Grafted Polypropylene) on Mechanical Properties and Thermal Properties

Nano Hybrids and Composites ◽

10.4028/www.scientific.net/nhc.32.85 ◽

2021 ◽

Vol 32 ◽

pp. 85-97

Author(s):

Gunturu Bujjibabu ◽

Vemulapalli Chittaranjan Das ◽

Malkapuram Ramakrishna ◽

Konduru Nagarjuna

Keyword(s):

Mechanical Properties ◽

Impact Strength ◽

Coupling Agent ◽

Mechanical Performance ◽

Hybrid Composites ◽

Natural Fibers ◽

Mechanical Tests ◽

Coir Fiber ◽

Banana Fiber ◽

C Fibers

Banana/Coir fiber reinforced polypropylene hybrid composites was formulated by using twin screw extruder and injection molding machine. Specimens were prepared untreated and treated B/C Hybrid composites with 4% and 8% of MA-g-PP to increase its compatibility with the polypropylene matrix. Both the without MA-g-PP and with MA-g-PP B/C hybrid composites was utilized and three levels of B/C fiber loadings 15/5, 10/10 and 5/15 % were used during manufacturing of B/C reinforced polypropylene hybrid composites. In this work mechanical performance (tensile, flexural and impact strengths) of untreated and treated (coupling agent) with 4% and 8% of MA-g-PP B/C fibers reinforced polypropylene hybrid composite have been investigated. Treated with MA-g-PP B/C fibers reinforced specimens explored better mechanical properties compared to untreated B/C fibers reinforced polypropylene hybrid composites. Mechanical tests represents that tensile, flexural and impact strength increases with increase in concentration of coupling agent compared to without coupling agent MA-g-PP hybrid composites . B/C fibers reinforced polymer composites exhibited higher tensile, flexural and impact strength at 5% of Banana fiber, 15% of fiber Coir in the presence of 8% of MA-g-PP compared to 4% of MA-g-PP and untreated hybrid composites. The percentage of water absorption in the B/C fibers reinforced polypropylene hybrid composites resisted due to the presence of coupling agent MA-g-PP and thermogravimetry analysis (TGA) also has done.

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The Effect of Water Absorption on Mechanical Properties of Wood Flour/Wheat Husk Polypropylene Hybrid Composites

Materials Sciences and Applications ◽

10.4236/msa.2012.35047 ◽

2012 ◽

Vol 03 (05) ◽

pp. 317-325 ◽

Cited By ~ 7

Author(s):

Pradeep Upadhyaya ◽

Manoj Garg ◽

Vijai Kumar ◽

Ajay K. Nema

Keyword(s):

Mechanical Properties ◽

Water Absorption ◽

Hybrid Composites ◽

Wood Flour ◽

Effect Of Water ◽

Wheat Husk

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Investigations on the Mechanical Properties of Glass Fiber/Sisal Fiber/Chitosan Reinforced Hybrid Polymer Sandwich Composite Scaffolds for Bone Fracture Fixation Applications

Polymers ◽

10.3390/polym12071501 ◽

2020 ◽

Vol 12 (7) ◽

pp. 1501 ◽

Cited By ~ 4

Author(s):

Soundhar Arumugam ◽

Jayakrishna Kandasamy ◽

Ain Umaira Md Shah ◽

Mohamed Thariq Hameed Sultan ◽

Syafiqah Nur Azrie Safri ◽

...

Keyword(s):

Mechanical Properties ◽

Water Absorption ◽

Glass Fiber ◽

Bone Fracture ◽

Hybrid Composite ◽

Bone Structure ◽

Hybrid Composites ◽

Sisal Fiber ◽

Composite Scaffolds ◽

Study Results

This study aims to explore the mechanical properties of hybrid glass fiber (GF)/sisal fiber (SF)/chitosan (CTS) composite material for orthopedic long bone plate applications. The GF/SF/CTS hybrid composite possesses a unique sandwich structure and comprises GF/CTS/epoxy as the external layers and SF/CTS/epoxy as the inner layers. The composite plate resembles the human bone structure (spongy internal cancellous matrix and rigid external cortical). The mechanical properties of the prepared hybrid sandwich composites samples were evaluated using tensile, flexural, micro hardness, and compression tests. The scanning electron microscopic (SEM) images were studied to analyze the failure mechanism of these composite samples. Besides, contact angle (CA) and water absorption tests were conducted using the sessile drop method to examine the wettability properties of the SF/CTS/epoxy and GF/SF/CTS/epoxy composites. Additionally, the porosity of the GF/SF/CTS composite scaffold samples were determined by using the ethanol infiltration method. The mechanical test results show that the GF/SF/CTS hybrid composites exhibit the bending strength of 343 MPa, ultimate tensile strength of 146 MPa, and compressive strength of 380 MPa with higher Young’s modulus in the bending tests (21.56 GPa) compared to the tensile (6646 MPa) and compressive modulus (2046 MPa). Wettability study results reveal that the GF/SF/CTS composite scaffolds were hydrophobic (CA = 92.41° ± 1.71°) with less water absorption of 3.436% compared to the SF/CTS composites (6.953%). The SF/CTS composites show a hydrophilic character (CA = 54.28° ± 3.06°). The experimental tests prove that the GF/SF/CTS hybrid composite can be used for orthopedic bone fracture plate applications in future.

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Hybrid Composites Based on Polypropylene with Basalt/Hazelnut Shell Fillers: The Influence of Temperature, Thermal Aging, and Water Absorption on Mechanical Properties

Polymers ◽

10.3390/polym12010018 ◽

2019 ◽

Vol 12 (1) ◽

pp. 18 ◽

Cited By ~ 2

Author(s):

Anna Kufel ◽

Stanisław Kuciel

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Water Absorption ◽

Thermal Aging ◽

Hybrid Composites ◽

Coefficient Of Thermal Expansion ◽

Tensile Modulus ◽

Charpy Impact ◽

Creep Tests ◽

Influence Of Temperature

The aim of the research was to study the effects of adding natural fillers to a polypropylene (PP) matrix on mechanical and physical properties of hybrid composites. The 10%, 15%, and 20% by weight basalt fibers (BF) and ground hazelnut shells (HS) were added to the PP matrix. Composites were produced by making use of an injection molding method. Tensile strength, tensile modulus, strain at break, Charpy impact strength, and the coefficient of thermal expansion were determined. The influence of temperature, thermal aging, and water absorption on mechanical properties was also investigated. In addition, short-time creep tests were carried out. To characterize the morphology and the filler distribution within the matrix, a scanning electron microscope (SEM) was used. The results showed that the addition of the two types of filler enhanced mechanical properties. Furthermore, improvements in thermal stability were monitored. After water absorption, the changes in the tensile properties of the tested composites were moderate. However, thermal aging caused a decrease in tensile strength and tensile modulus.

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Water absorption and mechanical properties of PP/HIPS hybrid composites filled with wood flour

Polymer Composites ◽

10.1002/pc.23647 ◽

2015 ◽

Vol 38 (5) ◽

pp. 863-869 ◽

Cited By ~ 14

Author(s):

Nadir Ayrilmis ◽

Münir Taşdemir ◽

Turgay Akbulut

Keyword(s):

Mechanical Properties ◽

Water Absorption ◽

Hybrid Composites ◽

Wood Flour

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Hybrid Composites Made from Jute/Coir Fibers: Water Absorption, Thickness Swelling, Density, Morphology, and Mechanical Properties

Journal of Natural Fibers ◽

10.1080/15440478.2013.825067 ◽

2014 ◽

Vol 11 (1) ◽

pp. 39-53 ◽

Cited By ~ 36

Author(s):

Sudhir Kumar Saw ◽

Khurshid Akhtar ◽

Narendra Yadav ◽

Ashwini Kumar Singh

Keyword(s):

Mechanical Properties ◽

Water Absorption ◽

Hybrid Composites ◽

Thickness Swelling ◽

Coir Fibers ◽

Absorption Thickness ◽

Morphology And Mechanical Properties

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Mechanical properties and water absorption of kenaf/pineapple leaf fiber‐reinforced polypropylene hybrid composites

Polymer Composites ◽

10.1002/pc.25451 ◽

2020 ◽

Vol 41 (4) ◽

pp. 1255-1264 ◽

Cited By ~ 2

Author(s):

Ng Lin Feng ◽

Sivakumar Dhar Malingam ◽

Chen Wei Ping ◽

Nadlene Razali

Keyword(s):

Mechanical Properties ◽

Water Absorption ◽

Hybrid Composites ◽

Fiber Reinforced ◽

Pineapple Leaf Fiber ◽

Leaf Fiber

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Study of Mechanical Properties of Alkali Treated SZF/SF/VE Hybrid Composites under Wet Condition

Materials Science ◽

10.5755/j02.ms.25410 ◽

2021 ◽

pp. X

Author(s):

Athijayamani AYYANAR ◽

Ramkumar GP ◽

Alavudeen AZIZ BATCHA ◽

Thiruchitrambalam MANI

Keyword(s):

Mechanical Properties ◽

Water Absorption ◽

Hybrid Composite ◽

Vinyl Ester ◽

Hybrid Composites ◽

Fiber Composites ◽

Hybrid Fiber ◽

Wet Condition ◽

Water Absorption Test ◽

Sisal Fibers

Mechanical properties of vinyl ester hybrid composites reinforced with alkali treated Smilax zeylanica and sisal fibers were studied at wet condition in the present communication. Hybrid composites were fabricated by using a simple hand lay up technique based on three different fiber loading of 25, 35, and 45 wt.% with alkali treated fibers. Hybrid composite specimens were then subjected to the water absorption test to observe the behaviours of composite specimens at wet condition under mechanical loads such as tensile, flexural and impact. Water absorption test was carried out in two ways at distilled water environment at room temperature. First way test was conducted for 10 days to observe the percentage of water particle absorption of hybrid composites. Second way test was performed for 5 days to determine the mechanical properties of hybrid composites at wet condition to observe its durability when they are used in outdoor applications. Mechanical properties of hybrid composite specimens at wet conditions were compared with the dry composite specimens. Experimental results showed that the percentage of the water particle absorption in the alkali treated hybrid fiber composites is lower as compared to the untreated hybrid fiber composites. Mechanical properties of alkali treated hybrid fiber composites at wet condition are slightly reduced as compared to the treated hybrid fiber composite at dry condition. As a result, it is observed that the resistance for the penetration of the water particles is higher for the alkali treated smilax zeylanica and sisal fibers reinforced vinyl ester hybrid composites. The fracture surfaces of the hybrid composite specimens were examined by scanning electron microscope to understand the effects of water absorption on the mechanical properties.

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