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Sains Malaysiana 48(5)(2019):
1121–1128 http://dx.doi.org/10.17576/jsm-2019-4805-21
Kesan Penambahan
Kepingan Nanozarah
Grafin terhadap Sifat Mekanik dan
Terma Hibrid
Komposit Serabut Sansevieria-Getah Asli-Polietilena
Berketumpatan Tinggi (Effects of Addition Graphene Nanoplatlet on the Mechanical Properties and Thermal Hybrid
Composite Fibre Sansevieria
Natural Rubber-High Density Polyethylene) NURZAM EZDIANI
ZAKARIA2,3,
ISHAK
AHMAD1,2,
WAN
NAZRI
WAN
BUSU3,
KHAIRUNNIZAH
HAZILA
KHALID3
& AZIZAH BAHARUM1,2* 1Pusat Penyelidikan
Polimer (PORCE), Fakulti
Sains dan Teknologi,
Universiti Kebangsaan
Malaysia, 43600 UKM Bangi, Selangor
Darul Ehsan, Malaysia 2Pusat Pengajian
Sains Kimia dan
Teknologi Makanan, Fakulti Sains dan
Teknologi, Universiti
Kebangsaan Malaysia, 43600 UKM Bangi,
Selangor Darul Ehsan, Malaysia 3Program Perekaan,
Pemprosesan dan
Pembungkusan Makanan, Pusat Penyelidikan Sains Teknologi, Makanan Institut Penyelidikan dan Kemajuan Pertanian Malaysia, Peti Surat 12301 Pejabat Pos Besar Diserahkan: 19 September 2018/Diterima: 15 Mac 2019 ABSTRAK Kajian ini dilakukan untuk
mengkaji kesan
penghibridan kepingan nanozarah grafin (GNP)
ke atas sifat
mekanik, morfologi
dan terma komposit
Sansevieria trifasciata-getah
asli-polietilena ketumpatan
tinggi (STF-NR-HDPE). Pemprosesan penghibridan komposit STF-NR-HDPE dan
GNP
dilakukan dengan
menggunakan mesin
pengadun dalaman. Tahap pengisian sebanyak 20 % bt. STF ke atas matriks
(NR/HDPE)
telah dilakukan
dalam kajian ini
dengan variasi
GNP
yang digunakan adalah
antara 1-10 % bt. Adunan komposit yang terhasil ditekan dengan mesin penekan
panas untuk
mendapatkan sampel ujian berketebalan 1 mm dan 3 mm. Sampel dinilai melalui ujian tegangan, ujian hentaman Izod, pembelauan sinar-X (XRD) dan
kalorimetri pengimbasan
berbeza (DSC). Kajian
morfologi pula dijalankan
dengan menggunakan mikroskop elektron pengimbas pelepasan medan (FESEM). Keputusan
menunjukkan bahawa
nilai kekuatan regangan dan kekuatan
hentaman komposit
menunjukkan sedikit penurunan bacaan pada permulaan penambahan amaun GNP tetapi bacaan kebanyakan
komposisi kemudiannya
menunjukkan peningkatan selepas 5 % bt. tahap pengisian dan ke atas.
Modulus tegangan pula secara
umumnya menunjukkan
peningkatan bacaan dengan penambahan pengisi. Analisis terma dengan menggunakan
alat DSC tidak
menunjukkan perubahan
aliran graf yang ketara terhadap kelakuan terma bahan. Ini kerana
STF
adalah bahan
yang mempunyai kestabilan
terma yang baik. Kata kunci:
Kepingan nanozarah
grafin; komposit hibrid; serabut semula jadi; sifat
mekanik ABSTRACT This research was done to study
the effects of graphene nanoplatlet
(GNP)
hybridization on the mechanical, morphological and thermal properties
of Sansevieria trifasciata-natural
rubber-high density polyethylene (STF-NR-HDPE) composite. Processing
of STF-NR-HDPE with modification of GNP was
done by using an internal mixer. Filler loading of 20 wt. % STF into
the matrix (NR/HDPE) was introduced in this study with variation of
GNP
composition used was around 1-10 wt. %. Composite
blends obtained were pressed with a hot-press machine to produce
samples with 1 mm and 3 mm of thickness. Samples were evaluated
via tensile test, Izod impact test,
X-Ray Diffraction (XRD) and differential scanning calorimeter
(DSC). Morphological study was done by using a field emission
scanning electron microscope (FESEM). The results showed that
tensile strength and impact strength had decreased at the early
stage of GNP
addition but the values keep increasing after more
than 5 wt. % of GNP were
added to the system. Generally, tensile modulus showed an increasing
trend with the increment of filler loading. Thermal analysis with
DSC did
not show any obvious trend towards materials’ thermal behavior.
This is due to the good thermal stability characteristic of STF. Keywords: Graphene nanoplatlet; hybrid
composites; mechanical properties; natural fiber RUJUKAN
Das, A., Boldt,
R., Jurk, R., Jehnichen,
D., Fischer, D., Werner Stockelhuber,
R. & Heinrich, G. 2014. Nano-scale morphological analysis
of grapheme-rubber composites using 3D transmission electron microscopy.
Royal Society of Chemistry 18: 9300-9307. Faruk, O., Bledzki,
A.K., Fink, H.P. & Sain, M. 2012.
Biocomposites reinforced with natural fibers: 2000-2010. Progress
in Polymer Science 37: 1552-1596. Frasca, D., Schulze, D., Wachtendorf, V., Huth, C. &
Schartel, B. 2015. Multifunctional multilayer graphene/elastomer
nanocomposites. European Polymer Journal 71: 99-113. Gao, Y., Picot, O.T., Bilotti, E. & Peijs, T. 2017.
Influence of filler size on the properties of poly(lactic
acid) (PLA)/graphene nanoplatelet (GNP)
nanocomposites. European Polymer Journal 86: 117-131. Geng, Y., Wang, S.J. & Kim, J.K. 2009.
Preparation of graphite nanoplatelets
and graphene sheets. Journal of Colloid and Interface Science
336: 592-598. Hanafi, I., Nizam,
J.M. & Abdul Khalil, H.P.S. 2001. The effect of a compatibilizer
on the mechanical properties and mass swell of white rice husk
ash filled natural rubber/linear low density polyethylene blends.
Polymer Testing 20(2): 125-133. He, F., Mensitieri,
G., Lavorgna, M., Luna, M.S., Filippone,
G., Xia, H., Esposito, R. & Scherillo,
G. 2017. Tailoring gas permeation and dielectric properties of
bromobutyl rubber - Graphene oxide nanocomposites
by inducing an ordered nanofiller microstructure. Composites Part B 116: 361-368.
Idumah, C.I. & Hassan, A. 2016. Characterization
and preparation of conductive exfoliated graphene nanoplatelets kenaf fibre hybrid polypropylene composites. Synthetic Metals
212: 91-104. Kang, H., Tang, Y., Yao, L. Yang,
F., Fang, Q. & Hui, D. 2017. Fabrication of graphene/natural
rubber nanocomposites with high dynamic properties through convenient
mechanical mixing. Composites Part B 112: 1-7. Kanimozhi, M. 2011. Investigating the physical
characteristics of Sansevieria
trifasciata fibre. International
Journal of Scientific and Research Publications 1(1): 1-4.
Kumar, K.H.G. & Xavior, A.M. 2017. Processing and characterization of Al 6061
- graphene nanocomposites. Materials Today: Proceeding 4:
3308-3314. Muhammad Razlan,
Z., Muhammad Helmi, A.K., Hazizan,
M.A. & Mohd Zharif,
M.T. 2017. Comparative study of graphene nanoparticle and multiwall
carbon nanotube filled epoxy nanocomposites based on mechanical,
thermal and dielectric properties. Composites Part B 119:
57-66. Noor Intan,
S.A., Sarani, Z., Kaco,
H., Chia, C.H., Wang, C. & Husna
Shazwani, A. 2018. Physico-mechanical,
chemical composition, thermal degradation and crystallinity of
oil palm empty fruit bunch, kenaf and polypropylene fibres:
A comparatives study. Sains
Malaysiana 47(4): 839-851. Nor Nabilla, K., Julie Elvyana, R., Norhamidi, M., Abu
Bakar, S. & Farhana, M.F. 2018.
Pengoptimuman parameter sonikasi
dan pengacauan magnetik bagi mendapatkan
penyerakan sebati
komposit kuprum-grafin berdasarkan sifat morfologi. Sains Malaysiana 47(5): 1039-1043. Nurul Hidayah,
I., Mohd Hafizi,
M. & Mariatti, J. 2018. Multi-walled carbon nanotubes/woven kenaf fabric-reinforced epoxy laminated composites. Sains Malaysiana 47(3):
563-569. Nurzam Ezdiani,
Z., Ishak, A., Wan Zarina,
W.M. & Azizah, B. 2018. Effects
of fibre size on Sansevieria
trifasciata/natural rubber/ high
density polyethylene biocomposites.
Malaysian Journal of Analytical Sciences 22(6): 1057-1064.
Ramanaiah, K., Ratna
Prasad, A.V. & Hema Chandra Reddy,
K. 2013. Mechanical, thermophysical
and fire properties of sansevieria fiber-reinforced polyester composites. Materials
and Design 49: 986-991. Sameer, B.R.K., Kumar, M.A., Murthy,
V.N. & Karthikeyan, N. 2015. Development
of Sansevieria trifasciata-carbon
fiber reinforced polymer hybrid nanocomposites. International
Letters of Chemistry, Physics and Astronomy 50: 179-187. Sathishkumar, T.P., Naveen, J. & Satheeshkumar, S. 2014. Hybrid fiber reinforced polymer composites
- A review. Journal of Reinforced Plastics and Composites 33:
454-471. Shesmani, S., Ashori,
A. & Fashapoyeh, M.A. 2013. Wood
plastic composite using graphene nanoplatelets.
International Journal of Biological Macromolecules 58:
1-6. Sreenivasan, V.S., Somasundaram,
S., Ravindran, D., Manikandan,
V. & Narayanasamy, R. 2011. Microstructural,
physico-chemical and mechanical characterization of Sansevieria cylindrica
fibres - an exploratory investigation. Materials and Design
32: 453-461. Valentini, L., Bon, S.B, Machado, M.A.L., Verdejo, R., Pappalardo, L., Bolognini, A., Alvino, A., Borsini,
S., Berardo, A. & Pugno,
N.M. 2016. Synergistic effect of graphene nanoplatelets
and carbon black in multifunctional EPDM nanocomposites. Composites
Science and Technology 128: 123-130. *Pengarang untuk surat-menyurat; email: azeiss@ukm.edu.my
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