AFRICAN FARMING AND FOOD PROCESSING E-NEWSLETTER

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The FUTO Library makes available to our esteemed staff members and students the full content of this African Farming and Food Processing E-Newsletter through this link: AFRICAN FARMING AND FOOD PROCESSING E-NEWSLETTER

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i PHYSICO – MECHANICAL PROPERTIES OF NATURAL RUBBER FILLED WITH TREATED GROUNDNUT SHELL POWDER FOR SHOE SOLE PRODUCTION

AUTHOR: AYO, MARK DADA (PhD)

DEPARTMENT: Polymer and Textile Engineering

SCHOOL: School of Engineering and Engineering Technology (SEET)

AFFILIATION: Federal University of Technology Owerri

Physico-Mechanical properties of natural rubber filled with chemically modified groundnut shells were studied. Natural rubber composites were prepared using modified fillers at varying concentrations of sodium hydroxide (NaOH) Solution and acetylating solutions respectively. The processing conditions, mechanical properties and sorption characteristics of these composites were analyzed. The cure characteristics of the compounded rubber were determined using Mosanto Rheometer (model MDR – 2000). The maximum torque and crosslinking density increases with increase in concentration of the mercerizing and acetylating agent. The fibre reinforcing efficiency of the chemically treated composites were compared with that of the untreated composite. Composites containing chemically treated fillers were found to posses improved tensile properties(from 18.30 to 31.50MPa for acetylated composites and 18.30 -28.00MPa for mercerized fillers), hardness (48 to 65 IRHD for acetylated filler and 48 to 58 for mercerized fillers) and abrasion resistance (from 31.55 t0 42.50% for acetylated filler and 31.5 to 39.30 for mercerized filler). These properties increases with increase in mercerizing and acetylating agent up to 20% concentration and starts decreasing. At higher concentration, the fibre is destroyed hence reduction in properties. These results were in agreement with empirical analysis. The sorption properties of the composite also decrease with the concentration of the mercerizing and acetylating agent. The improved properties observed were as a result of the increase in affinity between the rubber matrix and the chemically treated groundnut shell fillers. From this research work, it is recommended that chemically treated groundnut shell powder, particularly at 20% concentration can be employed for articles such as shoe soles, footmats and hoses that require less stress during service life.

THE FULL CONTENT OF THIS INFORMATION RESOURCE IS AVAILABLE AT THE FUTO LIBRARY WEBSITE AND CAN BE ACCESSED THROUGH THIS LINK: http://tinyurl.com/y9fbkk8c

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FEDERAL UNIVERSITY OF TECHNOLOGY OWERRI, CENTRE FOR         CONTINUING EDUCATION (CCE)

ONE YEAR CCE BASIC STUDIES PROGRAMME (JUPEB)

The Federal University of Technology, Owerri invites applications from suitably qualified candidates for consideration for admission into one year CCE Basic Studies Programme (JUPEB) for the 2017/2018 academic session.
DETAILS OF THIS INFORMATION CAN BE ACCESSED THROUGH THIS LINK:
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STUDIES OF SOME MECHANICL PROPERTIES OF WATERMELON RIND/PAWPAW PEEL REINFORCED POLYETHLENE COMPOSITES

AUTHOR: EZEIBEKWE STEPHEN UZODINMA (MSc)

DEPARTMENT: Polymer and Textile Engineering

SCHOOL: School of Engineering and Engineering Technology

AFFILIATION: Federal University of Technology Owerri

Some mechanical properties of water melon rind and pawpaw peel reinforced Low
density polyethylene (LDPE) and Linear Low Density, (LLDPE) composites have
been studied. Two sets of filler loaded LDPE and LLDPE composites were prepared using the injection moulding techniques at a processing temperature of 1900C
Dispersing agent, silicon oil, was added to the composite as a plasticizer to improve
flow, processability and to reduce the brittleness of the product. A comprehensive
range of mechanical properties: tensile strength, (modulus of elasticity, elongation at
break, elongation at yield), impact energy test and hardness test were carried out.
Tensile properties of the composite showed an increase in tensile modulus, impact
energy test, hardness test, a decline, in elongation at yield and break with increasing
filler loading. The tensile strength was enhanced with the incorporation of the two
fillers up to 20% filler loading and then decreased with further addition of filler. The
result obtained showed that pawpaw peel and water melon rind can be used as
reinforcing fillers in thermoplastics and secondly, development of composites,
enhances their mechanical properties.

THE FULL CONTENT OF THIS INFORMATION RESOURCE IS AVAILABLE AT THE FUTO LIBRARY WEBSITE AND CAN BE ACCESSED THROUGH THIS LINK: http://tinyurl.com/ybjp33x2

 

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SYNTHESIS AND CHARACTERIZATION OF ALKYD RESIN S FROM SELECTED INDIGENOUS SEEDS

AUTHOR: EZUGWU, MAUREEN UZOAMAKA (MSc)

DEPARTMENT: Polymer and Textile Engineering

SCHOOL: School of Engineering and Engineering Technology

AFFILIATION: Federal University of Technology Owerri

Alkyd resins were synthesized from the oils of flamboyant seed (FBO), sandbox seed (SBO), frywood seed (FWO) and vegetable sponge seed (VSO), and were compared with a commercial alkyd resin. The physico-chemical properties of both the oils and the consequent alkyd resin were studied. FourierTransform Infra-red (FTIR) spectroscopy was used to investigate the functional groups present in the alkyd resins. MATLAB was used to generate model equations for the extent of reaction for the synthesis of the alkyd resins. The oils extracted from the plants seedsexhibited different colours and were liquids at room temperature. The highest value of the oil yield (39.20%w/w) was seen in the sandbox seed while the vegetable sponge seed gave the lowest oil yield (2.20%w/w). The oil from the frywood seed was more viscous (27.06 m2/S) at 30oC while flamboyant seed oil was less viscous (21.74m2/S). The synthesized alkyd resins (FBOAR, SBOAR, FWOAR and VSOAR) were all dark-brown in colour while that of the commercially available alkyd resin (CPAR) was colourless. The specific gravity (52.80, 50.28, 47.70, 47.58 and 47.40 g/cm, at 30ºC) and viscosity (34.17, 33.97, 36.50, 35.46 and 32.34 m2/S, at 30 ºC) of FBOAR, SBOAR, FWOAR, VSOAR and CPAR were respectively determined and no significant different was observed in values of the test alkyd resins and the commercially prepared type. However, saponification values of the test alkyd resins (302.94, 403.92, 361.85 and 426.38mgKOH/g) were higher than the commercially prepared alkyd resin (263.97mgKOH/g) and iodine value was least in FWOAR (32.33gI2/100g) compared to FBOAR (56.98 gI2/100g), SBOAR (72.97 gI2/100g), VSOAR (48.84 gI2/100g) and CPAR (48.22gI2/100g). The acid value in SBOAR was highest (7.15mgKOH/g), followed by FWOAR (7.01mgKOH/g), FBOAR (6.45mgKOH/g), CPAR (6.31mgKOH/g), and VSOAR (6.17mgKOH/g). The model equation developed showed compliance with the experimental data. The IR spectra of the test alkyd resins and the commercially prepared alkyd resin show the broad band shoulder around 3859.69cm-1 and 3498.02 cm-1 were due to the OH stretch hydroxyl of the unsaturated fatty acid. The peak value within the range of 2930.93 cm-12933.83cm-1 observed in all the alkyd resins corresponds to SCN. The peak height observed around 1727.31cm-1 in all the alkyd resins except VSOAR, was due to CO stretch of unsaturated cyclic ester of monoglyceride while other peaks observed in FWOAR and CPAR suggest the presence of vinylidene compounds of unsaturated fatty acid of diglyceride and triglyceride. From the performance tests, the drying trend in terms of fast-to-dry were in the order: CPAR > VSOAR > SBOAR > FBOAR > FWOAR. All the alkyd film samples except that of FWOAR were observed to be highly resistant to water; CPAR, VSOAR and SBOAR were highly resistant to acidic medium. All alkyd film samples were poorly resistant to alkaline medium. Results obtained from this study suggest that the oils and oil modified alkyd resins synthesized from the test plants’ seeds exhibited good performance characteristics even when compared with the commercially produced resin and there are similar functional groups in the compounds observed in the absorbance of IR spectra.

THE FULL CONTENT OF THIS INFORMATION RESOURCE IS AVAILABLE AT THE FUTO LIBRARY WEBSITE AND BE ACCESSED THROUGH THIS LINK: http://tinyurl.com/yakuvmom

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PHYSICO – MEC H ANICAL PROPERTIES OF NATURAL RUBBER FILLED WITH CARBONIZED CHERRYAND RUBBER SEED SHELLS

AUTHOR: ONEGBEDAN, CORDELIA (MSc)

DEPARTMENT: Polymer and Textile Engineering

SCHOOL: School of Engineering and Engineering Technology (SEET)

AFFILIATION: Federal University of Technology Owerri

Physico-mechanical properties natural rubber filled with carbonized cherry and rubber seed shell as fillers were studied. Samples of cherry and rubber seed shells were carbonized at varying temperatures (100, 200, 300, 400, 500, 600 and 700oC for three hours each and sieved through a 100m mesh. The physical properties of fillers such as the swelling behavior, loss on ignition, iodine absorption number, moisture content, the pH and the bulk density results evaluated show that pH, iodine adsorption number and loss on ignition increase with carbonization temperature, moisture content decreases while bulk density varies with increase in carbonization temperature. The percentage swelling behaviour results show that carbonized cherry seed shell filled vulcanizates are more resistant to solvents used than carbonized rubber seed shell filled vulcanizates, The mechanical properties of the vulcanizate which include enlongation at break, compression set and flex fatigue decreases with increase in filler carbonization temperature. some mechanical properties Such as tensile strength, mochulus, Hardness and abrasion resistance increase with increase in filler carbonization temperature. The mesh size of 100m were used as to obtain a fine particles size. Any mesh size above 100m will be lesser. Thus for high quality vulcanizates carbonization should be done at 600oC.

THE FULL CONTENT OF THIS INFORMATION RESOURCE CAN BE ACCESSED FROM THE FUTO LIBRARY WEBSITE THROUGH THIS LINK: http://tinyurl.com/ya9zt8mv

 

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GHANA’S FIRST SATELLITE INTO SPACE BUILT BY UNIVERSITY STUDENTS

                                                         The development team behind the satellite | Photo via BBC

Ghana’s first satellite, dubbed GhanaSat-1, was released and deployed into orbit at an altitude of 420 km. This followed the successful launch on June 10 into the International Space Station (ISS) by SpaceX, Flight 11 from Kennedy Space Centre in Florida, the United States. The satellite was built by students of All Nations University.

The process was watched live at All Nations University campus in Koforidua, the Eastern Regional capital, some 85 km east of the capital. Project coordinator Dr Richard Damoah said it marked a new beginning for the country. “It has opened the door for us to do a lot of activities from space. It will also help us train the upcoming generation on how to apply satellites in different activities around our region. For instance, [monitoring] illegal mining is one of the things we are looking to accomplish,” he told the BBC. The satellite has cameras onboard capable of taking pictures of Ghana and providing data on happenings on Ghana’s coastal areas and the environment. The launch marked the end of a 2-year project which received support from the Japan Aerospace Exploration Agency (JAXA). The project cost $50,000.

 

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