STUDY THE EFFECT OF SURFACE TREATMENT ON THE MECHANICAL BEHAVIOUR OF NATURAL FIBER COMPOSITES
Transcript of STUDY THE EFFECT OF SURFACE TREATMENT ON THE MECHANICAL BEHAVIOUR OF NATURAL FIBER COMPOSITES
STUDY THE EFFECT OF SURFACE TREATMENT ON THE MECHANICAL BEHAVIOUR OF
NATURAL FIBER COMPOSITES
Guided by presented byMr. K. KRISHNAMOORTHY M. BHUVANESHWARAN (1031104)Associate Professor M.E- II year- EDDept. Of Mechanical Engg. Dept. of Mechanical Engg. KSRCT KSRCT
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CONTENTS FOR DISCUSSION
• Objective• Abstract• Introduction• Literature survey• Problem identification• Methodology• Results and discussion• Conclusions• References
Objective
• To study the mechanical behavior of PALF composite materials with various surface treatments.
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AbstractIn this present work investigates the tensile, flexural and impact
properties of pineapple leaf fiber–epoxy composites as a function of different fiber length like 3, 5, 7 and 9 mm with different surface treatments like alkaline, Benzoylation, Acrylonitrile. The tensile strength of the composites were found to be increasing with fiber length acrylonitrile treated fibers 5 mm length. The flexural strength of the composites were to be found to be increasing with the alkaline treated 9 mm fiber length. The impact strength of the composites were to found to be increasing with the alkaline treated fibers (5, 7 mm) length. The mechanical properties of PALF/EPOXY composites are increased with surface treatments and fiber length.
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Introduction
• Recent days, industries and engineers have focused a huge research activity on natural fiber composite due to the low density and easy availability.
• Natural fiber are generally used as biodegradable material.
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Literature survey
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Title of the paper
CHARACTERIZATION OF NATURAL FIBER SURFACES AND NATURAL FIBER COMPOSITES
N.Sgriccia, M.C.Hawley, M.Misra[Composites: Part A 39 (2008) 1632-1637]
Parameters kept constant/ materials for
study
Hemp and kenaf fibersEpoxy resin
Parameter varied
With three different fiber treatments: alkali, silane, alkali + silane and untreated
Inference/observation/conclusion
with justification
Kenaf fiber is treated with silane gives better flexural modulus. The mechanical properties of kenaf fiber is better than hemp fiber.
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Title of the paper
EFFECT OF VARIOUS CHEMICAL TREATMENTS ON THE FIBRE STRUCTURE AND TENSILE PROPERTIES OF
INDUSTRIAL HEMP FIBERSMoyeenuddin A. Sawpan, Kim L. Pickering, Alan Fernyhough
[Composites: Part A 42 (2011) 888-895]
Parameters kept constant/ materials for
studyHemp fibre
Parameter varied Alkaline, Silane, Maleic anhydride, Acetylatioon.
Inference/observation/conclusion
with justification
The tensile strength of NaOH treated fibers slightly higher than the other treatments.Combined treatment (Alkaline +Silane) the average tensile strength was decreased.
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Title of the paper
THE EFFECT OF ALKALINE TREATMENT ON TENSILE PROPERTIES OF SUGAR PALM FIBRE REINFORCED EPOXY COMPOSITES
D.Bachtiar, S.M.Sapuan, M.M.Hamdan[Materials and Design 29 (2008) 1285-1290]
Parameters kept constant/ materials for
study
Sugar palm fiberEpoxy resin
Parameter varied
Fiber treatment.Sodium hydroxide (NaOH) solution at two different concentrations and three different soaking times.
Inference/observation/conclusion
with justification
As the alkali concentration increased, the tensile strength decreased for the case of 1hr of soaking time. For the case of 4 hr of soaking time, when the alkali concentration was increased, the strengths remain constant (37.56MPa).The significant increase tensile strength for 0.25M alkali concentration with 1 hr soaking time (49.88MPa).
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Title of the paper
CHEMICAL TREATMENTS OF NATURAL FIBER FOR USE IN NATURAL FIBER-REINFORCED COMPOSITES: A REVIEW
[Polym Environ 15 (2007) 25-33]
• The different chemical modifications on natural fibers for use in natural fiber-reinforced composites were reviewed.•Chemical treatments including alkali, silane, acetylation, benzoylation, acrylation, maleated coupling agents, isocyanates, permanganate and others were discussed.• The chemical treatment of fiber aimed at improving the adhesion between the fiber surface and the polymer matrix may not only modify the fiber surface but also increase fiber strength.
Title of the paper
A STUDY OF THE MECHANICAL PROPERTIES OF SHORT NATURAL-FIBER REINFORCED COMPOSITES
[Composite: Part B 36 (2005) 597-608]
• In this paper henequen fibers was used.•The surface treatments were: an alkali treatment, a silane coupling agent and the pre-impregnation process of the HDPE/xylene solution.•The comparison of tensile properties of the composites showed that the silane treatment and the matrix-resin pre-impregnation process of the fiber produced a significant increases in tensile strength.
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Title of the paper
STRENGTH AND ADHESION CHARACTERISTICS OF ELEMENTARY FLAX FIBERS WITH DIFFERENT SURFACE
TREATMENTS [Composite: Part A 34 (2003) 603-612]
• Flax fibers can compete in terms of mechanical properties with glass fibers.• Untreated flax fibers and fibers coated by a special surface treatment are used.• Results show that there is a definite improvement in interfacial strength when a fiber surface treatment was applied.
Title of the paper
THE INFLUENCE OF FIBER SURFACE TREATMENT ON THE MECHANICAL PROPERTIES OF JUTE-POLYPROPYLENE
COMPOSITES [Composite: Part A 28A (1997) 1001-1005]
• This article concerns the effectiveness of MAH-PP copolymers (graft copolymer of PP and maleic anhydride) as coupling agents in jute – polypropylene composites.•Flexural strength of the composites with MAH-PP treated fibers was higher than that of unmodified fibers.
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PROBLEM IDENTIFICATION
Based on the above literature survey it is found that the study of mechanical properties of PALF/epoxy composite yet to be explored.
PALF is potential alternatives for synthetic fibers.
Methodology • To collect the pineapple leaf• Extraction the fiber from pineapple leaf• To give the surface treatment for fiber• To choose the fiber & resin ratio• To make the samples by compression moulding• To cut specimen as per ASTM standard• Test the specimen as per ASTM standard• Result analysis
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MATERIALS USED
Fiber Palf fiber
Resin Epoxy (araldite LY 556)
Hardener Aradur HY 951
Wax Minolta super wax polish
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SURFACE TREATMENTS
Name of the treatment Chemicals used methods
Alkaline5 % of Sodium hydroxide (NaOH)Duration 1 Hr
BenzoylationPre treated with NaOH (5 % duration 1 Hr)Benzoyl chloride + NaOH (10 % + 10% duration 15 min )Ethanol duration 1 Hr
Acrylonitrile
Acrylonitrile (3 %)Di cumyl peroxide (0.5 %)Ethanol (96.5%)Duration 15 min
SAMPLES PREPARATION
• To prepare the samples as per standard size 300 X 300 X 3 mm
• The specimen for tensile test had been prepared according to ASTM D 3039 standards
• The specimen for flexural test had been prepared according to ASTM D 790 standards
• The specimen for impact test had been prepared according to ASTM D 256 standards
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Results and discussion
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TENSILE RESULTS
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COMPRATIVE TENSILE RESULTSUT-Un TreatedAK-AlkalineBZ-BenzoylationAC-Acrylonitrile
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FLEXURAL RESULTS UT-Un TreatedAK-AlkalineBZ-BenzoylationAC-Acrylonitrile
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COMPRATIVE FLEXURAL RESULTSUT-Un TreatedAK-AlkalineBZ-BenzoylationAC-Acrylonitrile
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COMPRATIVE IMPACT RESULTS
CONCLUSION
Mechanical behaviour of short PALF fiber reinforced epoxy composites were studied.
From the close results obtained for epoxy composites with untreated, alkaline, benzoylation and acrylonitrile treated PALF fibers, acrylonitrile treated fibers (5 mm) have good adhesion with the epoxy resin for tensile properties.
At the same time alkaline treated fibers (5,7 mm) shows good result in impact properties.
Flexural strength of the alkaline treated 9 mm fiber length was obtained good result.
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The fiber with 7, 9 mm length of alkaline treated gives good results due to better mechanical interlocking between fiber and matrix.
From the above result it can be concluded that the 3 mm fiber were not suitable for short fiber (PALF) epoxy composite.
It can be concluded that surface treatment of the fibers is necessary to get composites with moderate mechanical properties as well as better adhesion between fibers and matrix.
References• Alexandre Gomes., Takanori Matsuo., Koichi Goda., and Junji Ohgi. (2007)
“Development and effect of alkali treatment on tensile properties of curaua fiber green composites”, Composites: Part A, Vol.38, pp.1811–1820.
• Arib R.M.N., Sapuan S.M., Ahmad M.M.H.M., Paridah M.T., and Khairul Zaman H.M.D. (2006) “Mechanical properties of pineapple leaf fiber reinforced polypropylene composites ”, Materials and Design, Vol.27, pp.391–396.
• Beckermann G.W., and Pickering K.L. (2008) “Engineering and evaluation of hemp fiber reinforced polypropylene composites: Fiber treatment and matrix modification”, Composites: Part A, Vol.39, pp.979–988.
• Bibin Mathew Cherian., Alcides Lopes Leaoa., Sivoney Ferreira de Souza., Sabu Thomas., Laly A. Pothan., and Kottaisamy M. (2010) “Isolation of nanocellulose from pineapple leaf fibers by steam explosion Carbohydrate”, Polymers, Vol.81, pp.720–725.
• Brahmakumar M., Pavithran C., and Pillai R.M. (2005) “Coconut fiber reinforced polyethylene composites: effect of natural waxy surface layer of the fiber on fiber/matrix interfacial bonding and strength of composites”, Composites Science and Technology, Vol. 65, pp.563–569.
• Geethamma V.G., Thomas Mathew K., Lakshminarayanan R., and Sabu Thomas. (1998) “Composite of short coir fibers and natural rubber: effect of chemical modification, loading and orientation of fiber”, Polymer, Vol.39, pp.1483-1491.
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• Gonzalez-Murillo C., and Ansell M.P. (2010) “Co-cured in-line joints for natural fiber composites”, Composites Science and Technology, Vol.70, pp.442–449.
• Harish S., Peter Michael D., Bensely A., Mohan Lal D., and Rajadurai A. (2009) “Mechanical property evaluation of natural fiber coir composite Materials characterization”, Vol. 60, pp.44–49.
• Herrera-Franco P.J., and Valadez-Gonza´lez A. (2005) “A study of the mechanical properties of short natural-fiber reinforced composites”, Composites: Part B, Vol.36 pp.597–608.
• Herrera-Franco P.J., and Valadez-Gonza´lez A. (2004) “Mechanical properties of continuous natural fiber-reinforced polymer composites”, Composites: Part A, Vol.35, pp.339–345.
• Hoi-yan Cheung., Mei-po Ho., Kin-tak Lau., Francisco Cardona., and David Hui. (2009) “Natural fiber-reinforced composites for bioengineering and environmental engineering applications”, Composites: Part B, Vol.40, pp.655–663.
• Jayamol George., Bhagawan S.S., and Sabu Thomas. (1998) “Effects Of Environment On The Properties Of Low-Density Polyethylene Composites Reinforced With Pineapple-Leaf FIBER Composites”, Science and Technology, Vol.58, pp.1471-1485.
• Monteiro S.N., Terrones L.A.H., and D’Almeida J.R.M. (2008) “Mechanical performance of coir fiber/polyester composites”, Polymer Testing, Vol.27 pp.591– 595.
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• Morsyleide F., Rosa., Bor-sen Chiou., Eliton S. Medeiros., Delilah F. Wood., Tina G. Williams., Luiz H.C. Mattoso., William J., Orts., and Syed H. Imam. (2009) “Effect of fiber treatments on tensile and thermal properties of starch/ethylene vinyl alcohol copolymers/coir biocomposites”, Bioresource Technology Vol.100, pp.5196–5202.
• Sasa Sofyan Munawar., Kenji Umemura., and Shuichi Kawai. (2007) “Characterization of the morphological, physical, and mechanical properties of seven nonwood plant fiber bundles” J Wood Sci, Vol.53, pp.108–113.
• Sgriccia N., Hawley M.C., and Misra M. (2008) “Characterization of natural fiber surfaces and natural fiber composites”, Composites: Part A, Vol.39, pp.1632–1637.
• Threepopnatkul P., Kaerkitcha N., and Athipongarporn N. (2009) “Effect of surface treatment on performance of pineapple leaf fiber–polycarbonate composites”, Composites: Part B, Vol.40, pp.628–632.
• Wanjun Liu., Manjusri Misra., Per Askeland., Lawrence Drzal T., and Amar K. Mohanty. (2005) “‘Green’ composites from soy based plastic and pineapple leaf fiber: fabrication and properties evaluation”, Polymer, Vol.46, pp.2710–2721.
• Xue Li Lope G., and Tabil Satyanarayan Panigrahi. (2007) “Chemical Treatments of Natural Fiber for Use in Natural Fiber-Reinforced Composites : A Review” J Polym Environ, Vol.15, pp.25–33.
• Yan Li., Yiu-Wing Mai., and Lin Ye. (2000) “Sisal fiber and its composites: a review of recent developments Composites”, Science and Technology, Vol.60, pp.2037-2055.
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Thank you