Razak, S. I. A., Sharif, N. F. A., Nayan, N. H. M. (2014). Electrically Conductive Paper of Polyaniline Modified Pineapple Leaf Fiber. Fibers and Polymers, 15, 1107-1111
This research work reports new electrically conductive paper made of pineapple leaf fiber and polyaniline (PALF/PANI). The conductive paper shows remarkable preservation of mechanical properties while achieving its conductive state. Also it was found that, the amount of PANI needed to achieve the conductivity transformation is as low as 5 wt.%.
Razak, S. I. A., Rahman, W. A. W. A., Yahya, M. Y. (2014). Hybrid Composites of Short Acetylated Kenaf Bast Fiber and Conducting Polyaniline Nanowires in Epoxy Resin. Journal of Composite Materials, 48,667-676
This article reports the preparation and characterization of newly developed hybrid composites consisting of epoxy resin (EP) matrix, acetylated kenaf bast fiber (AKF) and conducting polyaniline (PANI) nanowires. Initially, the EP/AKF composites were prepared by varying the AKF loading (5–30 wt%). The EP/AKF displayed an optimum tensile strength at 20 wt% AKF loading which was higher than that of untreated kenaf fiber EP composites (EP/UKF). The hybrid composites of EP/AKF/PANI were then prepared by using 20 wt% AKF loading with PANI inclusions from 2 to 14 wt%. The addition of PANI into EP/AKF induced positive electrical properties without considerably sacrificing its mechanical integrity. It was found that the electrical percolation threshold of these hybrid composites was at 11 wt% of PANI loading. PANI inclusions at above the percolation loading resulted in reduction of tensile and flexural strength. Meanwhile, no significant mechanical loss was observed below the threshold. The fracture morphological analysis revealed the occurrences of PANI nanowires pull out from the matrix. The Fourier transform infrared spectroscopy showed that the PANI component still maintained its doped condition inside the EP/20AKF. Water absorption and thermal analysis indicate that the PANI incorporation induced lower water uptakes and greater thermal stability to the EP/20AKF, respectively.
As a researcher, you can get better at what you are doing when you write about what you research. The more you write, the better you get at writing and at your research. One of the ways to be motivated to work harder and to get better is to know your performance. H-index is one way to measure a researcher’s performance. By keeping track of your h-index you can have an idea of how well you have done and how much better you should do next. Continue reading How to calculate h-index→
Sharif, N. F. A., Razak, S. I. A., Rahman, W. A. W. A. (2014). Cassava Leaves as Packaging Materials. Cellulose Chemistry and Technology.48, 585-590.
New packaging materials made from cassava leaves (CLs) were successfully prepared having desirable sheet properties. The CLs were treated with various concentrations of NaOH solution (mercerization), prior to the sheet making process. Several characterization methods were applied to elucidate the performance of the mercerized CLs. The results show that the tear index of 15% mercerized CLs is comparable to that of available paper or plastic sheets,having low moisture uptake, good wetting time, smooth sheet formation and non-toxicity. It is expected that the use of CLs as packaging material could reduce the dependency on paper and plastic based packaging.
Jaganathan, S. K., Arunpandian, B., Vellayappan, M. V., Manjesh, A. K., Priyadarshini, A., John, A., Supriyanto, E., Razak S. I. A., Marvi, M. (2014). A Review on Antiproliferative and Apoptotic Activities of Natural Honey. Anti-Cancer Agents in Medicinal Chemistry
Recent statistics revealed that cancer is one among the main reasons for death throughout the world. Several treatments are available but still there is no cure when it is detected at late stages. One of the treatment modes for cancer is chemotherapy which utilizes anticancer drugs in order to eradicate the cancer cells by apoptosis. Apoptosis is a programmed cell death through which body maintains homeostasis or kills cancer cells by utilizing its cell machinery. Recent researches have concluded that dietary agents have a putative role in instituting apoptosis of cancer cells. Honey, one of the victuals rich in antioxidants, has a long-standing exposure to humans and its role in cancer prevention and treatment is a topic of current interest. Various researchers have been experimenting honey against different cancers and provided valuable insights about the apoptosis induced by the honey. This review will highlight the recent findings of apoptotic mechanism involved in different cancer cells. Further it also reports antitumor activity of honey in some animal models. Hence it is high-time to initiate more preclinical trials as well as clinical experiments which would further add to the knowledge of anticancer nature of honey and also endorse honey as a potential candidate in the war against cancer.
Razak, S. I. A., Sharif, N. F. A., Nayan, N. H. M., Muhamad, I. I. (2014). In situ Deposition of Conducting Polymer onto Pineapple Leaf Fiber. Advanced Materials Research. 1043, 189-192.
This paper reports the properties of newly developed electrically conductive natural fiber made up of pineapple leaf fiber (PALF) and conducting polyaniline (PANI). The results revealed that the in situ coating of PANI (1 wt.%) showed minimal reduction on the PALF tensile strength. Percolation concentration of the PANI was observed at 5 wt.% and its corresponding electron micrograph showed good polymer deposition with the characteristic globular PANI formation plus no fiber damages. This fiber material has potentials for many applications such as composites, electroactive fillers and conductive sheets.
Nayan, N. H. M., Razak, S. I. A., Rahman, W. A. W. A. (2014). Biopulping by Ceriporiopsis Subvermispora towards Pineapple Leaf Fiber (PALF) Paper Properties. Advanced Materials Research. 1043, 180-183.
Environmental awareness and depletion of the wood resources are among vital factors that motivate various researchers to explore the potential of agro-based crops as an alternative source of fiber material in paper industries such as writing, printing, wrapping, and packaging. Fibers from agro-based crops are available in abundance, low cost, and most importantly its biodegradability features, which sometimes referred as “ecofriendly” materials. This paper reports the biopulping of pineapple leaf fiber (PALF) by Ceriporiopsis subvermispora towards the properties of its fiber and paper forms. The individual fibers were characterized having good tensile properties at 0.3% of fungus treatment and favourable structural properties as characterized by Fourier transform infra-red (FTIR) spectroscopy. It was also shown that the PALF paper achieved desirable tear index value and uniform morphological observations compared to the conventional chemical pulping method. This new approach of pulping PALF finds applications in paper and packaging products which requires biofriendly characteristic and cost effective.
Shaharuddin, S., Razak, S. I. A., Muhamad, I. I. (2014). Sugarcane Bagasse as the Potential Agro-waste Resource for the Immobilization of Lactobacillus rhamnosus NRRL 442. Advanced Materials Research Journal. 1043, 214-218.
Sugarcane bagasse was successfully developed to be used as immobilizing agent for Lactobacillus rhamnosus NRRL 442. Several different structural and morphology were obtained between the sugarcane bagasse and immobilized probiotic-sugarcane bagasse. Sugarcane bagasse was able to preserved high cell viability (~98%) after immobilization. Also it was shown that the bagasse was an excellent biomaterial for immobilizing Lactobacillus rhamnosus NRRL 442 and retaining the cell viability.
MOU INKED: More heart patients could be saved due to collaboration, says Muhyiddin
KUALA LUMPUR: MALAYSIANS can now get cheaper artificial hearts with the sharing of knowledge and further collaboration between two experts in their fields — the National Heart Institute (IJN) and Universiti Teknologi Malaysia (UTM). Continue reading IJN and UTM team up to build artificial hearts→
Razak, S.I.A., Ahmad, A.L., Zein, S.H.S., Boccaccini A.R. (2009). MnO2-filled Multiwalled Carbon Nanotube/Polyaniline Nanocomposites with Enhanced Interfacial Interaction and Electronic Properties. Scripta Materialia, 61, 592-595.
This paper reports the synthesis and characterization of new ternary nanocomposites combining polyaniline (PANI), multiwalled carbon nanotubes (MWCNTs) and manganese dioxide (MnO2). MnO2 was successfully incorporated within the MWCNTs. In situ polymerization of aniline in the presence of MWCNTs–MnO2 was carried out to form PANI/MWCNT–MnO2 nanocomposites, which were characterized by UV–visible and Fourier transform infrared spectroscopy, X-ray diffraction, field emission scanning electron microscopy with energy-dispersive X-ray analysis, and transmission electron microscopy, as well as electrical conductivity measurements. The PANI/MWCNT-MnO2 nanocomposites showed enhanced electrical conductivity compared to neat PANI and PANI/MWCNTs without MnO2 addition.