scholarly journals Starch-Jute fiber hybrid biocomposite modified with Epoxy resin layer: Fabrication and Experimental Characterization

2018 ◽  
Author(s):  
Akarsh Verma ◽  
Kamal Joshi ◽  
Amit Gaur ◽  
V. K. Singh
Keyword(s):  
Tensile Strength ◽  
Water Absorption ◽  
Epoxy Resin ◽  
High Water ◽  
Epoxy Coating ◽  
Jute Fiber ◽  
Compression Moulding ◽  
Resin Layer ◽  
Major Disadvantage ◽  
Water Absorption Property

In this article, bio-composites derived from starch-glycerol biodegradable matrix reinforced with jute fibers have been fabricated using the wet hand lay-up and compression moulding techniques. Samples having different weight percentages of jute fiber in the starch matrix have been analysed. The fibers surface was chemically treated by alkaline sodium hydroxide for improving the interphase bonding between fiber and matrix. Tensile test for the composites were done and the sample with highest tensile strength was selected for further tests that included water absorption, scanning electron microscopy and thermal analysis. It has been concluded that the ultimate tensile strength was found to be maximum for the composition of 15% fiber by weight composite as 7.547 MPa without epoxy coating and 10.43 MPa with epoxy coating. The major disadvantage of bio-composite is its high water absorption property, which in this study has been inhibited by the epoxy resin layer. Herein, the results of various tests done disclose a noteworthy improvement in the overall properties of bio-composite, in comparison to the neat biodegradable starch matrix.

scholarly journals Starch-jute fiber hybrid biocomposite modified with an epoxy resin coating: fabrication and experimental characterization

2018 ◽  
Vol 27 (5-6) ◽  
Author(s):  
Akarsh Verma ◽  
Kamal Joshi ◽  
Amit Gaur ◽  
V. K. Singh
Keyword(s):  
Tensile Strength ◽  
Epoxy Resin ◽  
Tensile Tests ◽  
Epoxy Coating ◽  
Jute Fiber ◽  
Experimental Characterization ◽  
Compression Moulding ◽  
Major Disadvantage ◽  
The Matrix ◽  
Epoxy Resin Coating

AbstractIn this article, biocomposites derived from a starch-glycerol biodegradable matrix reinforced with jute fibers were fabricated using the wet hand lay-up and compression moulding techniques. Samples having different weight percentages of jute fiber in the starch matrix were analyzed. The fiber’s surface was chemically treated by alkaline sodium hydroxide to improve the interphase bonding between the fiber and the matrix. Tensile tests for the composites were done and the sample with highest tensile strength was selected for further tests that included water absorption (WA), scanning electron microscopy (SEM) and thermal analysis (TA). It has been concluded that the ultimate tensile strength was found to be maximum for the composition of 15% fiber by weight composite as 7.547 MPa without epoxy coating and 10.43 MPa with epoxy coating. The major disadvantage of the biocomposite is its high WA property, which in this study was inhibited by the epoxy resin layer. Herein, the results of various tests done disclose a noteworthy improvement in the overall properties of bio-composite, in comparison to the neat biodegradable starch matrix.

scholarly journals Mechanical Characteristic and Water Absorption Property of Bio Composite from Sago Starch and Jute Fiber (Boehmeria Nivea) as the filler

2021 ◽  
Vol 2 (1) ◽  
pp. 94-99
Author(s):  
Rozanna Dewi ◽  
Oktaviani Oktaviani ◽  
Zainuddin Ginting ◽  
Novi Sylvia
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Water Absorption ◽  
Modulus Of Elasticity ◽  
High Water ◽  
Thermoplastic Starch ◽  
Absorption Capacity ◽  
Sago Starch ◽  
Hemp Fiber ◽  
Water Absorption Property

Environmentally friendly plastics can be degraded biologically in an anaerobic environment. This plastic is synthesized from starch such as sago starch which is available in abundance. In the form of bioplastics, its mechanical properties are still not compared to conventional plastics derived from crude oil, so its application is limited. The incorporation of filler material increases its mechanical properties, one of the selected fillers is hemp fiber as used in this study. Thermoplastic starch from sago with flax fiber as a filler and the addition of Polypropylene to improve mechanical properties with a certain composition to maintain its natural biodegradability. The mechanical properties analyzed were tensile strength, elongation and modulus of elasticity. Water absorption tests were also carried out to observe the water resistance properties. The results of the tensile strength test showed that the best tensile strength value of 9.32 Mpa was obtained at the addition of 35% fiber with a TPS: PP ratio of 1:1.5. The same conditions were obtained for the percent elongation with the results of 10.16% and the modulus of elasticity was 91.73 Mpa. Water absorption showed that 55% filler gave the lowest water     absorption, namely 4.41% at a ratio of TPS: PP 1:0.5. The addition of fiber filler into the bio-composite affects the tensile strength,    elongation and modulus of elasticity, the higher the volume of filler entering the bio-composite, the lower the value of tensile strength, elongation and modulus of elasticity, or vice versa. The ratio of addition of polypropylene matrix is also influential, the higher the ratio contributes to the tensile strength, elongation and higher modulus of elasticity. High water absorption capacity will reduce the performance of biocomposite, so the lower the water absorption ability, the better the quality of the biocomposite product and the wider its application

scholarly journals In-Situ Synthesis and Property Evaluation of High-Density Polyethylene Reinforced Groundnut Shell Particulate Composite

2021 ◽  
Vol 6 (4) ◽  
pp. 305-311
Author(s):  
Abdulmumin Adebisi ◽  
Tajudeen Mojisola ◽  
Umar Shehu ◽  
Muhammed Sani Adam ◽  
Yusuf Abdulaziz
Keyword(s):  
Tensile Strength ◽  
Water Absorption ◽  
Impact Energy ◽  
High Density Polyethylene ◽  
In Situ Synthesis ◽  
High Density ◽  
Compression Moulding ◽  
Melt Mixing ◽  
Groundnut Shell

In-situ synthesis of high-density polyethylene (HDPE) reinforced groundnut shell particulate (GSP) composite with treated GSP within the range of 10-30 wt% at 10 wt% has been achieved. The adopted technique used in the production of the composite is melt mixing and compounding using two roll mills with a compression moulding machine. Properties such as hardness, tensile strength, impact energy and water absorption analysis were examined. The result revealed that addition of GSP increases the hardness value from 22.3 to 87 Hv. However, the tensile strength progressively decreased as the GSP increases in the HDPE. This trend arises due to the interaction between neighbouring reinforced particulate which appears to influence the matrix flow, thereby inducing embrittlement of the polymer matrix. It was also observed that water absorption rate steadily increased with an increase in the exposure time and the absorbed amount of water increases by increasing the wt% of the GSP. Analysing the obtained results, it was concluded that there were improvements in the hardness, tensile strength, impact energy and water absorption properties of the HDPE-GSP polymer composite when compared to unreinforced HDPE. On these premises, GSP was found as a promising reinforcement which can positively influence the HDPE properties of modern composites.

INFLUENCE OF STRUCTURE OF POLYMERIC MATRIX ON STRUCTURE AND PROPERTY PRIMING COVERINGS

2021 ◽  
pp. 50-58
Author(s):  
V.A. Kuznetsova ◽  
◽  
V.G. Zheleznyak ◽  
S.L. Lonskii ◽  
N.A. Kovrizhkina ◽  
...  
Keyword(s):  
Water Absorption ◽  
Epoxy Resin ◽  
Phase Structure ◽  
Water Resistance ◽  
High Water ◽  
Physicomechanical Properties ◽  
Structure And Property ◽  
Organic Silicon ◽  
To Receive ◽  
Kinetics Of

Adhesion, physicomechanical properties, and also kinetics of water absorption of priming coatings on basis the E-41 epoxy resin modified by liquid Thiokol 1 and by Laproxide AF, and also their phase structure are investigated. As hardeners of primer compositions organic silicon ammine ASOT-2 and low-molecular polyamide PO-200 has been used. It is shown that use of the reactive modifier Laproxide AF and hardener ASOT-2 in the epoxy and thiokol film-formers allows to receive priming coating with uniform finely divided phase structure with low porosity and high water resistance.

scholarly journals Influence of Fraction Particle Size of Pure Straw and Blends of Straw with Calcium Carbonate or Cassava Starch on Pelletising Process and Pellet

Materials ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 4623
Author(s):  
Aleksander Lisowski ◽  
Patryk Matkowski ◽  
Leszek Mieszkalski ◽  
Remigiusz Mruk ◽  
Mateusz Stasiak ◽  
...  
Keyword(s):  
Particle Size ◽  
Tensile Strength ◽  
Calcium Carbonate ◽  
Water Absorption ◽  
Moisture Absorption ◽  
High Water ◽  
Agglomeration Process ◽  
Single Pellet ◽  
Compressive Loads ◽  
The Given

The aim of this study was to investigate the pressure agglomeration process of wheat straw (WS) and the blends of WS with calcium carbonate (CC) or cassava straw (CS) with a ratio of 6% wt./wt. from seven separate fractions with sizes in the range of 0.21–2.81 mm. The agglomeration was performed at a moisture of 30% wb and a material temperature of 78 °C, with a dose of 0.1 g, in a die of diameter 8 mm and height 80 mm. The effects of the process were evaluated based on the compaction parameters and the pellets’ density, tensile strength, and water absorption. The incorporation of additives into the WS improved the pellet process and quality. Refined results were achieved after adding CC, as compared to those achieved after adding CS, and the preferred particle size was in the range of 1.00–1.94 mm. This was because, under the given conditions, the back pressure in the die chamber significantly increased, allowing the achievement of a single pellet density of 800 kg·m−3. The pellets were resistant to compressive loads and cracked only at tensile strength of 6 MPa and a specific compression work of 6.5 mJ·mm−2. The addition of CC to the WS improved the strength of the adhesive and the cohesive bonds between the particles. The water absorption for the uncrushed pellets was considerably less than that for crushed pellets, which results in the safer storage of uncrushed pellets and excellent moisture absorption of crushed pellets. The addition of CC to the WS offers benefits in the form of pellet strength with a high water absorption capability. Notably, a study of crushed pellet litter under broiler rearing conditions and an analysis of the operational costs of using WS additives are required for implementing this study.

scholarly journals Hydraulic Abrasion-Resistant Elastic Epoxy Resin Materials

2019 ◽  
Vol 2019 ◽  
pp. 1-11
Author(s):  
Liqun Xu ◽  
Kai Zhang ◽  
Yanhui Liu
Keyword(s):  
Tensile Strength ◽  
Epoxy Resin ◽  
Abrasion Resistance ◽  
Concrete Structures ◽  
Epoxy Coating ◽  
Ring Test ◽  
Future Application ◽  
Pull Out ◽  
Hydraulic Concrete ◽  
Resistance Performance

The abrasion of hydraulic concrete structures caused by the washing action of flowing water is a common problem and cannot be solved by simply increasing the strength of the concrete. To ensure safe operation, increase in service life and reduction of maintenance costs of hydraulic concrete structures and the development of abrasion-resistant materials are required. In this work, polyurethane-modified epoxy resin was synthesized using the interpenetrating network technology (IPN). After many mixing experiments, the ratio of polyether amine to alicyclic amine in Component B was determined to be 29 : 14 and the ratio of Component A to Component B was 7 : 3. With these ratios, elastic epoxy achieved a tensile strength of more than 15 MPa and an elongation rate of more than 20%, thus balancing strength and toughness. The effects of the curing conditions, the ratio of Component A to Component B, and diluents and fillers on tensile strength and elongation of the elastic epoxy resin were analyzed. The results of the analysis indicated that the curing duration should be over 7 days, the optimal proportion of Component A to Component B should be 7 : 3, and the diluent of the elastic epoxy material should be the bifunctional butanedioldiglycidyl ether (622). The reliability of this material was determined by pull-out testing, adhesion, and tensile strength testing. The underwater steel ball test and ring test were adopted as the abrasion-resistance tests for the elastic epoxy resin material. The results showed that the abrasion-resistance performance of elastic epoxy coating improved hundreds of times over that of common concrete. Although the wearing strength was reduced with pressure, the elastic epoxy coating still retained excellent abrasion-resistance performance. At last, future application prospects of elastic epoxy improvement products are introduced and need further reach.

scholarly journals PENGARUH PENAMBAHAN BENTONIT TERMODIFIKASI SEBAGAI PENGISI TERHADAP SIFAT MEKANIK DAN PENYERAPAN AIR KOMPOSIT EPOKSI

2017 ◽  
Vol 5 (4) ◽  
pp. 39-44
Author(s):  
Alvian ◽  
Kenrick ◽  
Iriany
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Water Absorption ◽  
Epoxy Resin ◽  
Cetyltrimethylammonium Bromide ◽  
Absorption Capacity ◽  
Modified Bentonite ◽  
Maximum Value ◽  
Ftir Characterization ◽  
Scaning Electron Microscopy

Research about the application of modified bentonite as filler in epoxy has been done for the purpose of getting the best composition of modified bentonite as filler at epoxy composite to obtain the best mechanical properties such as tensile strength, impact strength and the water absorption. In this research, epoxy resin mixed with bentonite which have been modified using cetyltrimethylammonium bromide (CTAB) surfactant with various concentrations of 0,05M, 0,1M, and 0,15M. Modified bentonite filler and TiO2 then mixed with epoxy resin with various concentration of 5%, 10%, 15%, and 20% of filler from the total mass of the composite and then the composite was produced with hand lay-up method. The result of FTIR characterization showed that the bond between matrix and the filler produced was only interfacial bonding. The result of the mechanical properties test indicated that 5% of filler composition with 0,1M of surfactant concentration obtained the maximum value of tensile strength and mechanical strength respectively 33,667 MPa and 12564,9 J/m2. The result of mechanical properties test was supported by analysis of Scaning Electron Microscopy (SEM). On the test of water absorption, the water absorption capacity increased along with the increased of filler composition.

scholarly journals Development of Modified Recycled Aggregate for the Production of Sustainable Concrete

2019 ◽  
Vol 8 (3) ◽  
pp. 8614-8618
Keyword(s):  
Fly Ash ◽  
Water Absorption ◽  
Alkaline Solution ◽  
High Water ◽  
Ash Content ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Micro Cracks ◽  
Class C ◽  
Water Absorption Property

This paper deals with the treatment methods of recycled aggregate (RA) for its high water absorption which is due to the old mortar and micro-cracks on the surface of the recycled aggregate. Geopolymer paste which is made using class C & F fly ash are used for coating the recycled aggregate in order to reduce the water absorption (WA). The parameters which influence the coating of RA are fly ash content, molarity of alkaline solution, Liquid alkaline to ash ratio (LA/ash). The effect of each parameter on coating RA are analysed using Response surface methodology. It is observed that all the parameters has influenced the water absorption property of RA. LA/ash ratio depends on the molarity of the alkaline solution in reducing the WA of recycled aggregate. Coating of recycled aggregate with class C fly ash performed better than class F and uncoated recycled aggregate concrete. The optimal content of fly ash content, LA/ash ratio and molarity of solution are arrived using the statistical analysis are 4%, 0.35 and 9M respectively

scholarly journals CHARACTERIZATION OF LOW DENSITY POLYETHYLENE WASTE FILLED WITH PALM KERNEL SHELL

2021 ◽  
Vol 8 (4) ◽  
pp. 71-78
Author(s):  
F. Inegbedion ◽  
L. C. Igbonazobi ◽  
A. O. Imasuen ◽  
C. O. Inetianbor
Keyword(s):  
Tensile Strength ◽  
Water Absorption ◽  
Agricultural Waste ◽  
Palm Kernel ◽  
Filler Loading ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Compression Moulding ◽  
Palm Kernel Shell

All over the world, polyethylene wastes has been found littered on the streets of most communities and states. Palm kernel shell (agricultural waste) constitutes dirt and environmental pollution. The aim of this research was to study the potentials of palm kernel shell (PKS) filler as reinforcement for low density polyethylene (LDPE) waste. LDPE-Palm kernel shell composites of varying ratio (100:0, 90:10, 80:20, 70:30, 60:40, 50:50) of LDPE to PKS respectively were produced using the compression moulding technique. Mechanical properties such as water absorption, hardness, young’s modulus and tensile strength of the composites were found to increase with increasing PKS loading. The results showed that composites containing 40% of PKS gave the highest tensile strength corresponding to 18.42MPa. The results also indicated that the composites with 50% filler loading gave the highest hardness of 84.25A and water absorption rate which stood at 3.1%. The elongation at break was found to decrease with increasing filler content. The scanning electron micrograph (SEM) obtained revealed that the composites with 20% and 50% palm kernel shell had voids and surface cracks.

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