Nik Noriman Zulkepli
Thumbnail Image
Preferred name
Nik Noriman Zulkepli
Official Name
Nik Noriman , Zulkepli
Alternative Name
Zulkepli, N. N.
Noriman, Nik Zulkepli
Noriman, N. Z.
Zulkepli, Nik N.
Zulkepli, Nik Noriman
Main Affiliation
Scopus Author ID
55898485400
Researcher ID
J-6410-2015

Research Output

Filters

16
2 1
16
Reset filters

Settings
Now showing 1 - 10 of 16
Thumbnail Image
Publication

The influence of alkali treatment on date seeds powder reinforced LLDPE composites: Flexural properties and impact strength

2020-03-25 , Elnaid A. , Nik Noriman Zulkepli , Dahham O.S. , Rosniza Hamzah , Muhammad Azizi Azizan , Hazry Desa , Umar M.U.

In this work, the influences of different concentration of sodium hydroxide (NaOH) (3, 6 and 9 wt.%) on the flexural and impact properties of linear low-density polyethylene / date seeds (LLDPE/DS) composites were examined. The LLDPE / DS ratio was fixed at 90/10 wt.% and the size of DS particles was measured at 125 - 250 micro m. The process used to synthesize the composites id extrusion followed by injuction molding process. Results showed that the presence of NaOH particularly at 6 wt.% concentration has improved the flexural and impact properties of the composite. This is due to bonding of the date seeds particles with the LLDPE matrix that reflected posativelly on the mechanical properties of the composite. However, the using of high NaOH concentration (9 wt.%) has shown an opposite trend, the increasing of surface roughness of the fiber after 9% NaOH treatment has reduced the flexibility of the composite and made it stiffer and more rigid, which in turn made it easy to break during mechanical test.

View
Thumbnail Image
Publication

Studies on characteristic of glycerol-kenaf pellet via fluidization drying process toward energy produced

2020-03-25 , Zainuddin H.H.M. , Mohd Al-Hafiz Mohd Nawi , Kasim M.S. , Mohd. Hazwan Mohd. Hanid , Wan Azani Wan Mustafa , Nik Noriman Zulkepli , Dahham O.S.

Glycerol is a co-product compound of biodiesel production that have an interesting heating value. In this study, biomass which is Kenaf plant was mixed with the Glycerol that act as a binder and additives to produce a pellet for energy. Kenaf plant was dried using Sherwood M501 air fluid bed dryer before pelletizing. Air fluid bed dryer is one of the fluidization drying process that have potential to be widely used. The motivation for this study was the material used contain the high value of water and the lower bulk density of pellet. The purpose of this study are to determine the characteristic of Glycerol-Kenaf pellet with a various test. This study will focused on the percentage of Glycerol used, the bulk density of pellet, durability of pellet and the calorific value of pellet. During fluidization process the best condition for the properties of pellet, the pellet which contain 40% Glycerol, 40% Epoxy has been produce a good density and durability. The 50% Glycerol, 30% Epoxy give a high calorific value than 40% Glycerol, 40% Epoxy. Glycerol can react as a binder and additives. Glycerol help to increase the calorific value of the biomass pellet.

View
Thumbnail Image
Publication

Insight on the structural aspect of ENR-50/TiO2 hybrid in KOH/C3H8O medium revealed by NMR spectroscopy

2020-01-01 , Dahham O.S. , Rosniza Hamzah , Abu Bakar M. , Nik Noriman Zulkepli , Alakrach A.M. , Sam Sung Ting , Mohd Firdaus Omar , Tijjani Adam , Al-rashdi A.A.

The ring-opening reactions (ROR) of epoxide groups in epoxidized natural rubber/titania (ENR-50/TiO2) hybrid in potassium hydroxide/isopropanol medium were examined using NMR spectroscopy and supported by the FTIR technique. The thermal behaviour of the hybrid was also studied using TG/DTG and DSC analyses. The 1H NMR results suggested that 16.82% of ROR occurred in the hybrid, while the 13C NMR results exhibited five new peaks at δ 19.5, 71.0, 73.7, 91.7 and 94.4 ppm in the hybrid. 2D NMR, such as HMQC, HMBC and COSY techniques, further scrutinized these assignments. The FTIR spectrum exhibited Ti-O-C characteristics via the peak at 1028 cm−1. The TG/DTG results showed four steps of thermal degradation at 44–148, 219–309, 331–489 and 629–810 °C due to the existence of Ti moieties along with a polymer chain mixture (intact and ring-opened epoxide groups) of ENR-50, which in turn led to an increase in the Tg value of the hybrid to 27 °C compared to that of purified ENR-50 at −17.72 °C.

View
Thumbnail Image
Publication

Flexural properties of rice husk (Oryza sativa) reinforced low density polyethylene composites for industrial injection moulded parts

2020-03-25 , Jaya H. , Nik Noriman Zulkepli , Shayfull Zamree Abd. Rahim , Mohd Firdaus Omar , Rosniza Hamzah , Dahham O.S. , Umar M.U.

Injection moulding had been one of the best choices in plastic manufacturing industry as it manage produced complex-shaped plastic parts in very short cycle times. This article is concerned with the flexural properties of low-density polyethylene (LDPE) reinforced with rice husk (RH) filler specifically for injection moulded parts. In this study, the RH/LDPE composites with different loadings of 5, 10, and 15 wt.% RH were feed into injection moulding machine and the moulded parts were tested using conventional universal testing machine. The results showed that the flexural properties of the RH/LDPE composites were strongly affected by the filler loadings. Furthermore, all the flexural properties of the RH/LDPE composites showed increasing trend as the filler loading increased, up to 15 wt.% of RH loading.

View
Thumbnail Image
Publication

Dielectric properties of Nephelium Lappaceum tropical wood

2020-03-25 , Khor Shing Fhan , Cheng Ee Meng , Banjuraizah Johar , Nashrul Fazli Mohd Nasir , Zaizul M.A. , Wan Azani Wan Mustafa , Nik Noriman Zulkepli , Dahham O.S.

Dielectric properties of rambutan wood (Nephelium Lappaceum) were investigated in three anisotropic directions, namely miters-cut, cross-cut, and rib-cut. Dielectric constants and dielectric loss factors were measured at ambient temperatures by using an impedance analyzer. The dielectric constant decreased as frequency increased from 4 to 1 MHz. Among the wood specimens, the rib-cut direction has the lowest dielectric constant, while the cross-cut direction has the highest value. A dielectric dispersion occurred within frequencies 100 Hz to 10 kHz, which corresponding to a relaxation peak as observed on dielectric loss factor spectra. The relaxation peak value of the dielectric loss factors shifted towards higher frequencies in the sequence of rib-cut, miters-cut, and cross-cut specimen. Above 500 Hz, the cross-cut specimen has the highest value conductivity than others. Generally, these variations were subjected to the anatomical structure in the wood, such as parenchyma, ray cell, vessel cell, and fiber cell.

View
Thumbnail Image
Publication

The influence of trans-polyoctylene rubber on the linear low-density polyethylene/acrylonitrile butadiene rubber/kenaf composites

2020-03-25 , Othman N.S. , Ragunathan Al Santiagoo , Azhar A.S. , Wan Azani Wan Mustafa , Nik Noriman Zulkepli , Dahham O.S.

The fabrication of new thermoplastic elastomer composites made up from linear low-density polyethylene (LLDPE), acrylonitrile butadiene rubber (NBR) and kenaf core (KC) were studied. The composites with and without trans-polyoctylene rubber (TOR) as compatibilizer was investigated. LLDPE/NBR/KC composite samples were prepared by using a heated two-roll mill at 130°C for 13 minutes. Then, the composite were moulded by using hot press machines at temperature of 130°C within 12 minutes. The ratio of composite investigated were 100/0/10, 80/20/10, 70/30/10, 60/40/10, 50/50/10 and 40/60/10 for both series. Meanwhile, the ratio of TOR was fixed at 10phr for composite with compatibilizer. The tensile strength, Young's modulus and elongation at break were recorded using INSTRON Universal Testing machine. The morphological properties of composites were also observed by using Scanning Electron Microscope (SEM). Meanwhile, the chemical composition of composite with and without TOR compatibilizer was investigated by using Fourier-transform infrared spectroscopy (FTIR). From the result obtained, the tensile strength and modulus were decreased with increasing of NBR loading while the elongation at break (Eb) was increased. The morphological examination indicated that the presence of TOR compatibilizers showed improvement in adhesion and better interfacial bonding between filler and matrix.

View
Thumbnail Image
Publication

The effects on different date seeds loading and size of LLDPE/Date seeds composites: Flexural properties and impact strength

2020-03-25 , Elnaid A. , Nik Noriman Zulkepli , Dahham O.S. , Rosniza Hamzah , Muhammad Azizi Azizan , Hazry Desa , Umar M.U.

This work evaluated the effect of different loading and size of date seeds (DS) on some mechanical properties of LLDPE/DS composites. Three different size (125 - 250 mm, 250-500 mm, and 500 - 1000 â–¡m) and four different size loading (5, 10, 15, 20 wt%) of DS were used in this work. Flexural and Impact properties were evaluated when DS added to the LLDPE/DS composites. In order to fabricate this composite, the extrusion process followed by injection molding process was used respectively. It is found that the Flexural strength and Flexural modulus decreased with the increasing of date seeds loading in the composites. Furthermore, the Flexural properties of the composite with a coarser size of DS reduced more than other size of DS. The results of the impact strength testing have shown a similar trend of flexural properties. The LLDPE/DS composites at high DS loading show low impact strength (IS) value. Furthermore, the DS coarser size shows lower impact strength than other DS size. The reduction of the mechanical properties in the composites was probably due to the lack of a suitable coupling agent system need to be used to improve the adhesion bonding between filler and matrix.

View
Thumbnail Image
Publication

The sustainability of recycled concrete as green material solution

2020-03-25 , Muhammad Azizi Azizan , Nik Noriman Zulkepli , Hazry Desa , Nurfadzillah Ishak , Dahham O.S. , Umar M.U. , Johari I.

Nowadays, there are lot of concrete waste were produced from demolition, destruction and others. The usage of concrete is not environmentally friendly due to depletion of reserve natural resources, high energy consumption and disposal issues. Construction debris give a large fraction of solid waste disposal problem, and constitutes the large component. By recycling concrete waste for brick production as replacement the other materials, it can reduce the usage of natural resources and disposal problem that have been occur. The aim of this study to determine the sustainability of the recycled concrete by producing a brick using recycled coarse concrete aggregate at nominal size 10mm. An experiment done by comparing the result of the control specimen using 100% natural sand with specimen that have replaced the sand with recycled concrete aggregate for 0%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, and 100%. The result showed the optimum recycled concrete to produce a brick is at 90% replacement of RCCA where the compressive strength and flexural was achieved 9.7MPA and 3.53MPA respectively with 16133.33 kg/m3 of density. The water absorption of green brick is 9.23% and the cost of brick have been reduced from Rm0.26 to 0.20.

View
Thumbnail Image
Publication

Mechanical properties of rice husk (Oryza sativa) reinforced low density polyethylene composites for industrial injection moulded parts

2020-03-25 , Jaya H. , Nik Noriman Zulkepli , Shayfull Zamree Abd. Rahim , Mohd Firdaus Omar , Rosniza Hamzah , Dahham O.S. , Umar M.U.

Injection moulding is one of the most widely used processes in manufacturing plastic products, which has developed into a mature technology. Injection moulding is greatly preferred in manufacturing industry because it can produce complex-shaped plastic parts with good dimensional accuracy in very short cycle times. This article is concerned with the tensile properties of low-density polyethylene (LDPE) reinforced with alkaline treated rice husk (RH) specifically for injection moulded parts. In this study, the RH/LDPE composites with different loadings of 5, 10, and 15 wt.% treated RH were feed into injection moulding machine and the moulded parts were tested using conventional universal testing machine. The results showed that the tensile and flexural properties of the RH/LDPE composites were strongly affected by the filler loadings. Furthermore, all the tensile and flexural properties of the RH/LDPE composites showed increasing trend as the filler loading increased, up to 15 wt.% treated RH.

View
Thumbnail Image
Publication

The effectiveness of highway information modeling in Kuala Perlis - Changlun Roadway

2020-03-25 , Muhammad Azizi Azizan , Nik Noriman Zulkepli , Hazry Desa , Nurfadzillah Ishak , Dahham O.S. , Umar M.U. , Jaya H.

Road and highway observation is critical for road engineers to determine the information of the highway itself for the needs of maintenance, rehabilitation and even in construction. This research reviews the efficiency of information of roads and highway by visual and experience. The mean of visual includes the usage of Unmanned Aerial Vehicles (UAV) and on spot observation. It also reveals the image based, photogrammetric and stereo-vision, and mobile mapping systems.The software output has compatibility with known CAD/GIS packages to widen its scope of applications. Methodologies, examples and demonstration related to the use of the developed software and laser scanning data in road mapping for a case study are described. The results showed the flexibilities of the developed software and the proposed method for generating the necessary maps and data for road distresses such as longitudinal cracks, transverse cracks, patch deterioration, potholes, and ravelling. However, the present work shows that using terrestrial laser scanning technologies for modelling the road surface has advantages such as surveying speed, big roads, highways and tunnels. Also it provides the safety for surveyors and the absence of a disruption to traffic. The developed software and methodology are suitable for universities, academic centres and are of great interest to small engineering firms for the generation of road surface maps.

View