KENAF/RECYCLED JUTE NATURAL FIBERS UNSATURATED POLYESTER COMPOSITES: WATER ABSORPTION/DIMENSIONAL STABILITY AND MECHANICAL PROPERTIES

2012 ◽  
Vol 01 (01) ◽  
pp. 1250010 ◽  
Author(s):  
EKHLAS A. OSMAN ◽  
ANATOLI VAKHGUELT ◽  
IGOR SBARSKI ◽  
SAAD A. MUTASHER
Keyword(s):  
Water Absorption ◽  
Hybrid Composites ◽  
Unsaturated Polyester ◽  
Natural Fibers ◽  
Fickian Diffusion ◽  
Flexural Properties ◽  
Thickness Swelling ◽  
Kenaf Fiber ◽  
Polyester Composites ◽  
Kenaf Composites

Effects of water absorption on the flexural properties of kenaf-unsaturated polyester composites and kenaf/recycled jute-unsaturated polyester composites were investigated. In the hybrid composites, the total fiber content was fixed to 20 wt%. In this 20 wt%, the addition of jute fiber varied from 0 to 75%, with increment of 25%. The result demonstrates the water absorption and the thickness swelling increased with increase in immersion time. Effects of water absorption on flexural properties of kenaf fiber composites can be reduced significantly with incorporation of recycled jute in composites formulation. The process of absorption of water was found to approach Fickian diffusion behavior for both kenaf composites and hybrid composites.

Preparation and Dimensional Stability of Organo-Montmorillonite (O-MMT) Treated Unsaturated Polyester Hybrid Composites Filled with Keratin Fiber

2014 ◽  
Vol 980 ◽  
pp. 28-32
Author(s):  
Kiew Kwong Siong ◽  
Soon Kok Heng ◽  
Sinin Hamdan ◽  
Moaz Mohsin ◽  
Akshay Kakar ◽  
...  
Keyword(s):  
Water Absorption ◽  
Dimensional Stability ◽  
Hybrid Composites ◽  
Unsaturated Polyester ◽  
Fiber Content ◽  
High Dimensional ◽  
Thickness Swelling ◽  
Stability Properties ◽  
Chicken Feathers ◽  
Keratin Fiber

O-MMT treated unsaturated polyester based hybrid composites were prepared using keratin fiber obtained from chicken feathers. Fibers of similar dimension were selected to fabricate composites through hand lay-up method. The preparation and dimensional stability properties of keratin fiber as reinforcements in composites is outlined in this paper. Varying O-MMT contents in nancomposites is performed to investigate the effects on the dimensional stability (water absorption and thickness swelling) of the composites. Results indicated that increasing fiber content deteriorates dimensional stability of the composites and composites. However, improvements in dimensional stability of the keratin fibercomposites were observed with O-MMT. O-MMT treatment reduces the water absorption and thickness swelling, especially at 5wt% of O-MMT concentrationat all range of fiber content. At 5wt% concentration of O-MMt, 10wt% keratin fiber content marks the lowest water absorption and thickness swelling with rate of 0.65% and 1.93%, respectively. Adopting 10wt% of keratin fiber at 5wt% of O-MMT can be utilized for application requiring high dimensional stability.

scholarly journals Effect of Water Absorption on Flexural Properties of Kenaf/Glass Fibres Reinforced Unsaturated Polyester Hybrid Composites Rod

2022 ◽  
Vol 30 (1) ◽  
pp. 397-412
Author(s):  
Bassam Hamid Alaseel ◽  
Mohamed Ansari Mohamed Nainar ◽  
Noor Afeefah Nordin ◽  
Zainudin Yahya ◽  
Mohd Nazim Abdul Rahim
Keyword(s):  
Flexural Strength ◽  
Water Absorption ◽  
Glass Fibre ◽  
Volume Fraction ◽  
Hybrid Composites ◽  
Unsaturated Polyester ◽  
Flexural Properties ◽  
Effect Of Water ◽  
Kenaf Fibre ◽  
Kenaf Fibres

This study investigates the effect of water absorption on the flexural strength of kenaf/ glass/unsaturated polyester (UPE) hybrid composite solid round rods used for insulating material applications. Three volume fractions of kenaf/glass fibre 20:80 (KGPE20), 30:70 (KGPE30), and 40:60 (KGPE40) with three different fibre arrangement profiles of kenaf fibres were fabricated by using the pultrusion technique and were aimed at studying the effect of kenaf fibres arrangement profile and its content in hybrid composites. The fibre/ resin volume fraction was maintained constant at 60:40. The dispersion morphologies of tested specimens were observed using the scanning electron microscope (SEM). The findings were compared with pure glass fibre-reinforced UPE (control) composite. The water absorption results showed a clear indication of how it influenced the flexural strength of the hybrid and non-hybrid composites. The least affected sample was observed in the 30KGPE composite type, wherein the kenaf fibre was concentrated at the centre of a cross-section of the composite rod. The water absorption reduced the flexural strength by 7%, 40%, 24%, and 38% of glass/UPE (control), 20KGPE, 30KGPE, and 40KGPE composites, respectively. In randomly distributed composite types, the water absorption is directly proportional to the volume fraction of kenaf fibre. At the same time, flexural properties were inversely proportional to the volume fraction of kenaf fibres. Although the influence of water absorption on flexural strength is low, the flexural strength of pultruded hybrid composites was more influenced by the arrangement of kenaf fibre in each composite type than its fibre loading.

Comparative Study of Physical Properties Based on Different Parts of Sugar Palm Fibre Reinforced Unsaturated Polyester Composites

2011 ◽  
Vol 471-472 ◽  
pp. 455-460 ◽  
Author(s):  
J. Sahari ◽  
S.M. Sapuan ◽  
Z.N. Ismarrubie ◽  
M.Z.A. Rahman
Keyword(s):  
Physical Properties ◽  
Water Absorption ◽  
Unsaturated Polyester ◽  
Raw Material ◽  
Thickness Swelling ◽  
Natural Composites ◽  
Sugar Palm Fibre ◽  
Polyester Composites ◽  
Palm Fibre ◽  
Palm Bunch

This research was conducted to evaluate the potential of sugar palm residue as a raw material to produce the new green composites. The physical properties of sugar palm fibre reinforced unsaturated polyester composites from different part which are sugar palm frond (SPF/PE), sugar palm bunch (SPB/PE), sugar palm trunk (SPT/PE) and black sugar palm fibre (ijuk/PE) were studied. Samples were submerged in distilled water for 24 hours. The water absorption and thickness swelling were investigated in order to determine the dimensional stability of the composites. It is found that SPF/PE showed the higher value of water absorption and thickness swelling which are 1.57%, and 1.56% followed by SPB/PE (1.35%, 1.11%), ijuk/PE (0.65%, 0.76%) and SPT/PE (0.39%, 0.50%). Generally, this investigation is valuable for researchers in order to evaluate the potential and some possible application of sugar palm residues as a new natural composites product.

scholarly journals Water Absorption and Thickness Swelling Properties of Silica Aerogel Infused Sugar Palm Fiber/Polyester Composites

2019 ◽  
Vol 8 (2S4) ◽  
pp. 506-509
Keyword(s):  
Water Absorption ◽  
Silica Aerogel ◽  
Unsaturated Polyester ◽  
Thickness Swelling ◽  
Weekly Basis ◽  
Swelling Properties ◽  
Sugar Palm Fiber ◽  
Swelling Characteristics ◽  
Polyester Composites ◽  
Percentage Of Water Absorption

Using natural fibres as reinforcements in composites provides an inexpensive green alternate to its synthetic counterpart. In a similar scope, to enhance the usability of sugar palm fibres (SPF) in composites, various weight percentages (1% to 5%) of silica aerogel (SA) were infused in SPF reinforced unsaturated polyester composites. The samples were prepared using hand layup procedure followed by hot pressing at 80°C for 30 minutes. The physical properties such as water absorption and thickness swelling characteristics of the composites were investigated. The specimen of water absorption and thickness swelling were exposed to water absorption for a total of 90 days and measured on alternate days in first week. Later, the readings were taken on a weekly basis until the 3rd week and bi-weekly for the rest of immersion time. Pure SPF composites showed lowest water absorption and thickness swelling and it increased with addition of SA. The highest water absorption was recorded up to 12 % and thickness swelling was 7% in 5% SA composites. SA showed its hydrophilicity character, but the percentage of water absorption and thickness swelling is very less.

Mechanical and Water Absorption Properties of Hybrid Kenaf/Glass Fibre Mat Reinforced Unsaturated Polyester Composites

2017 ◽  
Vol 888 ◽  
pp. 228-233 ◽  
Author(s):  
Nurshairatun Amira Rozali ◽  
Mohamad Bashree Abu Bakar ◽  
Mohamad Najmi Masri ◽  
Muhammad Azwadi Sulaiman ◽  
Mazlan Mohamed ◽  
...  
Keyword(s):  
Water Absorption ◽  
Glass Fibre ◽  
Room Temperature ◽  
Hybrid Composites ◽  
Unsaturated Polyester ◽  
Morphological Properties ◽  
Flexural Test ◽  
Thickness Swelling ◽  
Absorption Properties ◽  
Kenaf Fibre

Hybrid kenaf/glass fibre mat reinforced unsaturated polyester (UPE) composites have been prepared by using simple hand lay up moulding technique. The composites with various formulations were characterized by flexural test while water absorption behaviour were investigated with immersion in distilled water at room temperature. The result shows that the hybrid composites with kenaf fibre mat at the innermost layers (glass fibre mat at the outer layers) has given the highest flexural strength and modulus. On the other hand, water absorption study shows that, the hybrid composites with glass fibre mat at the innermost layers (kenaf fibre mat at the outer layers) showed the highest water uptake and thickness swelling. Further investigations on morphological properties were also done to correlate the mechanical properties of the hybrid kenaf/glass fibre mat reinforced UPE composites.

Tensile, Flexural and Water Absorption Properties of Bamboo Fiber/Unsaturated Polyester Composites: Effect of Calcium Carbonate Content

2020 ◽  
Vol 867 ◽  
pp. 68-74
Author(s):  
Sugiman Sugiman ◽  
Atin Martino ◽  
Paryanto Dwi Setyawan ◽  
Buan Anshari
Keyword(s):  
Tensile Strength ◽  
Elastic Modulus ◽  
Flexural Strength ◽  
Water Absorption ◽  
Unsaturated Polyester ◽  
Bamboo Fiber ◽  
Flexural Properties ◽  
Carbonate Content ◽  
Absorption Properties ◽  
Polyester Composites

The paper presents the effect of CaCO3 content on the tensile, flexural and water absorption properties of bamboo fiber/polystyrene-modified unsaturated polyester composites. Two volume fractions of bamboo fibers had been used with the CaCO3 content varied from 2.5 to 10 (wt%). The tensile and flexural properties were used to characterize the composites. In addition, the water absorption and its effect of the flexural properties had also been conducted. The results showed that at the bamboo content of 30%, adding CaCO3 up to 10wt% tended to decrease the tensile strength and elastic modulus of bamboo fiber/modified unsaturated polyester composites up to 27% and 4%, respectively; however, at the bamboo content of 20%, its effect was not significant for both the tensile strength and the elastic modulus. Adding CaCO3 seemed not to have a significant effect for both the flexural strength and modulus. Having exposed in distilled water, CaCO3 did not significantly affect the water uptakes and the flexural properties of bamboo fiber/modified unsaturated polyester composites; however, the flexural strength and modulus significantly decreased in the ranges of 24 - 45% and 36 - 43%, respectively, compared to those in dry condition.

The Effect of Fiber Size on the Mechanical Properties of Bertam/Unsaturated Polyester Composites

2015 ◽  
Vol 761 ◽  
pp. 52-56
Author(s):  
M.H. Norhidayah ◽  
Arep Hambali ◽  
M.Y. Yuhazri
Keyword(s):  
Mechanical Properties ◽  
Fiber Length ◽  
Unsaturated Polyester ◽  
Flexural Modulus ◽  
Flexural Properties ◽  
Fiber Size ◽  
Polyester Composites

The aim of this paper was the effects of different fiber size on tensile and flexural properties. Preparation of thermoset unsaturated polyester reinforced with particle Bertam (Eugeissona tristis) was done by hand layout method. Bertam/polyester composites containing Bertam fiber of different sizes, i.e., 15, 120 and 284 μm were prepared. For each composite, eight specimens were tested to evaluate the mechanical properties. It was found that composite reinforced with Bertam having the shortest fiber length, i.e, 15 μm showed the highest tensile and flexural modulus, which were 204.14 MPa and 1826.78 MPa, respectively.

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