scholarly journals MECHANICAL AND PHYSICAL PROPERTIES OF THERMOPLASTIC CORN STARCH

2021 ◽  
Vol 83 (5) ◽  
pp. 119-127
Author(s):  
Nazri Huzaimi Zakaria ◽  
Ridhwan Jumaidin ◽  
Mohd Adrinata Shaharuzaman ◽  
Mohd Rody Mohamad Zin ◽  
Fudhail Abdul Munir
Keyword(s):  
Tensile Strength ◽  
Moisture Content ◽  
Physical Properties ◽  
Water Absorption ◽  
Corn Starch ◽  
Absorption Test ◽  
Physical Test ◽  
Biodegradable Composite ◽  
Mechanical And Physical Properties ◽  
Water Absorption Test

The awareness to produce biodegradable composite has increased rapidly because of non-toxic and reachable. However, fully biodegradable composite production still low due to the matrix used in the composite is not biodegradable. Thus, this paper presents the study on mechanical and physical properties for the mixtures of corn starch (CS) with different weight percentages of glycerol as thermoplastics corn starch (TPCS) matrix. The selected glycerol contents were at 30, 35 and 40 wt%. The mixtures of CS and different weight percentages of glycerol were made using hot compression moulding at 165°C for 15 minutes to produce the TPCS samples. The mechanical and physical properties were done: the tensile test, hardness test, water absorption test, moisture content test and microstructure analysis under the Scanning Electron Microscopes (SEM). Incorporating 30 wt% loadings of glycerol has increased the tensile strength and hardness. The results show that the addition of higher than 30 wt% loadings of glycerol has decreased the tensile strength and hardness of the TPCS. The physical test results for 30 wt% loadings of glycerol for water absorption test and moisture content show the lowest value than other TPCS samples. However, the density value for all wt% loadings of glycerol does not offer much difference. It reveals that 30 wt% loadings of glycerol in the mixture of CS have shown a good interaction in the TPCS mechanical properties. Based on this finding, the TPCS has huge potential to be used as a matrix to develop a fully biodegradable composite.

scholarly journals CHARACTERISTICS OF PHYSICAL PROPERTIES OF WOOD POWDER COMPOSITES AND BAGASSEAS CONSTRUCTION MATERIALS OF SHIP

2019 ◽  
Vol 5 (1) ◽  
Author(s):  
Ersti Yulika Sari ◽  
Polaris Nasution ◽  
Fajri Ramdhan1
Keyword(s):  
Physical Properties ◽  
Water Absorption ◽  
Construction Materials ◽  
Absorption Test ◽  
Wood Powder ◽  
Powder Composites ◽  
Density Values ◽  
Water Absorption Test ◽  
Composite Wood

Parameters for measuring the physical properties on this research are divided into three elements, including measurement of weight, water absorption, and density. This research was conducted from January to March 2018 to determine the physical properties of wood powder composites and bagasse. The manufacturing and testing process refers to the ASTM and JIS standards. Weight and density testing refer to the ASTM D 792 standard while the water absorption test refers to the JIS A5908 standard. The results showed that the density of wood powder was 0.4175 gr / cm3, and the bagasse was 0.3125 gr / cm3. Then, fiber absorption in units of volume to water and resin were 16.88% and 13.75% respectively. The results showed that the largest water absorption was found in composite wood powder 60% and bagasse 40%, which was 13.47%, and for the highest density values found in wood powder composites as much as 80% or 1,078.29 kg / m3

The Effect of Ultraviolet Exposure on Physical Properties of Electrospun Nanofiber Membrane Based on Polyvinyl Alcohol and Aloe vera

2020 ◽  
Vol 860 ◽  
pp. 244-250
Author(s):  
Dyah Hikmawati ◽  
Noveni Putri Maharani ◽  
Alfian Pramudita Putra ◽  
Siswanto
Keyword(s):  
Polyvinyl Alcohol ◽  
Physical Properties ◽  
Water Absorption ◽  
Aloe Vera ◽  
Uv Exposure ◽  
Absorption Test ◽  
Scanning Calorimetry ◽  
Sem Images ◽  
Water Absorption Test ◽  
Test Result

Ultraviolet (UV) irradiation in biomaterial synthesis is commonly used to do sterilization and increase physical characteristics. This study had a goal to evaluate the characteristics of polyvinyl alcohol-Aloe vera (PVA-AV) nanofibers from the electrospinning process that was exposed by UV with the power of 8, 10, 15, and 20 W for 6 h. The physical properties of the fiber were characterized by using Scanning Electron Microscope (SEM), Fourier Transform Infrared (FTIR), Differential Scanning Calorimetry (DSC) test, and water absorption test. The SEM images showed that the nanofibers were formed with s homogeneous structure and no beads. The diameter and the thickness of the nanofibers increased with the increase of the power of UV exposure to the sample. The biggest diameter was 319.60 ± 56.17 nm at UV exposure power of 20 W. The FTIR test result indicated that there was no new chemical bond after the PVA-AV was exposed by UV. DSC test result showed that the increase of power could increase the melting temperature (Tm) with the highest value of 189.51°C at UV exposure power of 20 W. The water absorption test showed that the highest water absorption was 739.6 % at UV exposure power of 20 W.

scholarly journals REDUCTION OF CEMENT CONSUMPTION BY THE AID OF SILICA NANO-PARTICLES (INVESTIGATION ON CONCRETE PROPERTIES)

2012 ◽  
Vol 18 (3) ◽  
pp. 416-425 ◽  
Author(s):  
Hadi Bahadori ◽  
Payam Hosseini
Keyword(s):  
Tensile Strength ◽  
Water Absorption ◽  
Physical And Mechanical Properties ◽  
Strength Loss ◽  
Experimental Results ◽  
Nano Particles ◽  
Hardened Concrete ◽  
Absorption Test ◽  
Concrete Properties ◽  
Water Absorption Test

In this study, effects of replacing cement with colloidal amorphous silica nano-particles have been experimentally investigated on the physical and mechanical properties, durability and microstructure of concrete. Experimental results include workability, fresh concrete density, and hardened concrete properties like compressive strength at different ages of 3, 7, and 28-days, and also 28-days splitting tensile strength. Furthermore, influence of silica nano-particles on durability and microstructure of concrete for 28-days specimens was tested by conducting water absorption test, Scanning Electron Microscopy (SEM), and Energy Dispersive X-ray Analysis (EDAX), respectively. In order to study the effect of replacement of cement with silica nano-particles, specimens with 10%, 20%, and 30% cement reduction, and addition of 1%, 2%, and 3% silica nano-particles with respect to witness specimen were fabricated. Experimental results revealed that 20% reduction of cement combining 2% silica nano-particles and also 10% cement reduction combined with 1% silica nano-particles enhance the microstructure of concrete, despite unnoticeable compressive and tensile strength loss. By remarkable reduction of cement consumption and addition of silica nano-particles, strength almost remains constant and consequently decreasing the cement content will become possible. Also, in all specimens, increase in nano-particles content and decrease in cement usage contributed to workability loss. Therefore, applying super-plasticizers seems indispensible while using silica nano-particles. On the other side, according to water absorption test, concretes containing nanoparticles showed more appropriate durability.

scholarly journals Utilization of Pitali (Trewia nudiflora) for Manufacturing Commercial Plywood in Bangladesh

1970 ◽  
Vol 43 (4) ◽  
pp. 581-587
Author(s):  
M Hasan Shahria ◽  
M Ashaduzzaman ◽  
M Iftekhar Shams ◽  
Arifa Sharmin ◽  
M Muktarul Islam
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Moisture Content ◽  
Physical Properties ◽  
Water Absorption ◽  
Linear Expansion ◽  
Urea Formaldehyde ◽  
Physical And Mechanical Properties ◽  
Thickness Swelling ◽  
Trewia Nudiflora

The study was conducted to find out the potentiality of Pitali (Trewia nudiflora) for manufacturing commercial plywood and evaluating its physical and mechanical properties. Two 9-ply plywood of 2.4m x 1.2m x 18mm size were manufactured using liquid urea formaldehyde adhesive. The physical and mechanical properties of T. nudiflora plywood were compared with the existing market available plywood manufactured by Simul (Bombax ceiba). It was found that density were 509.82 kg/m3 and 490.96 kg/m3, moisture content after curing were 10.67% and 17.61%, thickness swelling were 6.90% and 7.29%, linear expansion were 0.19% and 0.15%, water absorption were 50.89% and 64.79%, MOR were 29.94 N/mm2 and 27.05 N/mm2, MOE were 1613.89 N/mm2 and 1160.68 N/mm2, and tensile strength were 14.75 N/mm2 and 13.12 N/mm2 for T. nudiflora plywood and market plywood respectively. The evaluated physical and mechanical properties of T. nudiflora plywood were also compared with some relevant results and standards reported earlier. Key Words: Plywood, Trewia nudiflora, Physical properties, Mechanical properties. doi: 10.3329/bjsir.v43i4.2249 Bangladesh J. Sci. Ind. Res. 43(4),581-587, 2008

Effect of water absorption on mechanical and tribological properties of Indian ramie/epoxy composites

2021 ◽  
pp. 135065012110056
Author(s):  
Rajiv Kumar ◽  
Mir I Ul Haq ◽  
Sanjay M Sharma ◽  
Ankush Raina ◽  
Ankush Anand
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Tensile Strength ◽  
Impact Strength ◽  
Water Absorption ◽  
Epoxy Composites ◽  
Absorption Test ◽  
Mechanical And Tribological Properties ◽  
Water Absorption Test ◽  
Scanning Electron

In the present work, the water absorption behaviour of Indian ramie/epoxy composites and its effect on mechanical and tribological behaviour have been investigated. The composites fabricated using the hand layup technique were immersed in distilled water at room temperature for water absorption test for a period of 120 days. Mechanical and tribological properties were evaluated for composites with 30 wt.% ramie fibre loading. The results obtained were compared with that of the dry specimen. Mechanical properties including tensile strength, flexural strength, impact strength and hardness were evaluated. A reduction of 16.85%, 13.63%, 21.02% and 3.33% in tensile strength, flexural strength, impact strength and hardness was observed after the water immersion, respectively. Friction and wear behaviour was also investigated for water immersed specimen. Frictional coefficient decreased for the developed composites and wear performance reduced after the water absorption test. Fractured surfaces post to mechanical testing and worn out surfaces of tribological test samples were examined by scanning electron microscopy. The weakening of fibre–matrix interface was observed in the scanning electron microscopy micrographs, which appears to be the main cause for the degradation of properties.

Studies on the Development of Benzoyl Peroxide Catalysed Rapid Oil Tanning using Linseed Oil

2021 ◽  
Vol 116 (7) ◽  
Author(s):  
Bindia Sahu ◽  
Jaya Prakash Alla ◽  
Gladstone Christopher Jayakumar
Keyword(s):  
Amino Acids ◽  
Tensile Strength ◽  
Physical Properties ◽  
Water Absorption ◽  
Benzoyl Peroxide ◽  
Special Class ◽  
Linseed Oil ◽  
Tanning Process ◽  
Remarkable Reduction ◽  
Better Than

Leather tanning is a stabilisation process of skin fibers. This is achieved by the interaction of collagen amino acids with tanning agents to stabilise skin from putrefaction. Tanning of collagen with oil is a special class of tanning known as chamois tanning. Chemically, the oil tanning involves oxidation of unsaturation present in the oil, which is generally achieved by exposing oil treated skins to air. In this study, Benzoyl peroxide has been used as an accelerating agent for oxidation of unsaturated bonds present in the linseed oil for oil tanning process. Results shows remarkable reduction in tanning duration from fifteen days to two days. The chamois leathers prepared using oxidation accelerant (Benzoyl peroxide) have been evaluated for physical properties such as water absorption (611%), tensile strength (18 N/mm2) and percentage of elongation (66 %) which are found to be better than control leathers.

scholarly journals Chitosan succinate/PVA-PEG Membrane: Preparation, Characterization and Permeation Ability Test on Creatinine

2018 ◽  
Vol 21 (2) ◽  
pp. 80-84 ◽  
Author(s):  
Retno Ariadi Lusiana ◽  
Vivi Dia Ahmad Sangkota ◽  
Sri Juari Santosa
Keyword(s):  
Tensile Strength ◽  
Water Absorption ◽  
Poly Vinyl Alcohol ◽  
Inversion Method ◽  
Ability Test ◽  
Chitosan Membrane ◽  
Water Absorption Test ◽  
Poly Ethylene ◽  
Membrane Strain ◽  
Phase Inversion Method

Evaluation character of chitosan membrane-succinate / poly vinyl alcohol-poly ethylene glycol (PVA-PEG) were prepared in acetic acid solvent through a phase inversion method has been performed. The study began with the preparation of crosslinked chitosan compounds with succinic acid, followed by preparation into membrane by combining PVA-PEG. Character analysis of the resulting material using FTIR, EDX, TGA, water absorption test, tensile strength, membrane hydrophilicity. The ability of membrane permeation was tested against creatinine. The results showed that the succinate had reacted with chitosan. Chitosan modification through cross link and polymer alloys increases tensile strength and membrane strain of 1.7-2.5 x of pure chitosan membrane. In addition, the modified membrane also has higher water absorption and hydrophilicity values than the unmodified membrane, and this implies the ability of membrane-induced creatinine permeation. Permeable permeation values were 13.8% in chitosan, 24.84% on chitosan-succinate and 25% in chitosan-succinate / PVA-PEG. Chitosan-succinate membranes have the ability to use more than 4x repeated use.

scholarly journals Nahrwan Clays Study for Brick Industry

2008 ◽  
Vol 5 (4) ◽  
pp. 538-544
Author(s):  
Baghdad Science Journal
Keyword(s):  
Compressive Strength ◽  
Chemical Analysis ◽  
Moisture Content ◽  
Physical Properties ◽  
Clay Brick ◽  
Quaternary Sediment ◽  
Physical Test ◽  
Class A ◽  
Clay Deposits ◽  
Depth Ranges

Nahrawan clay deposits lies in Diyala governorate , 65 Km, NE of Baghdad , according to the previous work in this field, in which they study the reserve belong to category of investigation ( C2 & C1 ) , we choice the proper area to investigation of category (B) with drill net( 200x 200m ) to rise the amount of reserve. The investigation work included drilling (116) boreholes of total depth ranges from (10.0-12.55m) , showed mainly clayey and silty deposits with little sand , and the typical borehole (648) represents all types of sediment in the area , and most of boreholes without sandy deposits , and all of these deposits is Quaternary sediment which is consist of two main sedimentary cycles ( the Pleistocene & Holocene ) . Chemical analysis for (343) samples were done , and physical test carried on ( 143 ) samples , and all show suitable properties for clay brick industry . the area of investigation covered ( 5.200.000 m2) involving ( 620.000 m2 ) containing soluble salt more than ( 3.5%) , which was separated from the total area , so the residual (4.580.000m2 ) had been taken to calculate the reserve , with depth of ( 10.76m) for the industrial clay bed . The reserve calculations depended on the following chemical & physical Properties: The chemical analysis shows that , CaO ( 16.53%) MgO ( 4.65% ) , SO3 ( 1.42%) , T.S.S. (2.42%) , the physical properties are unfired properties Which contains Bulk density ( 2.09gm/cm3) , moisture content (20.95%) , linear dry shri. (7.63%) , and fired properties which contain water absorption (18.8%) , linear shri. (0.8%) volume shri. (2.212% ) , compressive strength ( 468.606Kg/cm2) . So the reserve of category (B) is ( 49.280. 800 m3 ) or (102.966.000 Ton) the physical test showed that the brick classified into class (A-B) .

Studies on Tensile and Water Absorption Properties on Kenaf (Hibiscus Cannabinus) Fibre Mat/Polyester Composite Using Chemical Treatment

2013 ◽  
Vol 421 ◽  
pp. 290-295
Author(s):  
Mohammad Taib Mohamad Nurul Azman ◽  
Abu Kassim Masitah ◽  
Ariff Jamaludin Mohd ◽  
Ismail Tayibbah
Keyword(s):  
Water Absorption ◽  
Treatment Duration ◽  
Hibiscus Cannabinus ◽  
Absorption Test ◽  
Duration Of Treatment ◽  
Absorption Properties ◽  
Kenaf Fibre ◽  
Polyester Composite ◽  
Water Absorption Test ◽  
Polyester Composites

This research investigated the tensile and water absorption properties of kenaf fibre mat/polyester composites. Treatment using acetylation method has been introduced to improve the properties of product manufactured. The effects of acetylation treatment with three variations of time that were 1, 4 and 24 hours on the kenaf fibre mats were investigated. The MOE of the tensile of treated fibre mat/polyester composite for 1 hour was the highest with value 4589.61 MPa. The tensile strength of treated fibre mat/polyester composite for 4 hours was the highest with value 0.6213 MPa. For water absorption test, the results showed that fibre mat/polyester composite with treatment duration for 1 hour had the lowest water absorption that was 1.23% compared with treatment duration for 4 hours and 24 hours. For overall it can be concluded that the treatment duration of 1 hour was recommended for acetylation method when compared with 4 hours and 24 hours duration treatments. Using acetylation treatment on the kenaf fibre mat/polyester composites was showed improvement on composite and was recommended in short duration of treatment.

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