Thermal Analysis of Sisal/Epoxy Composite Processed by RTM

2015 ◽  
Vol 719-720 ◽  
pp. 50-54
Author(s):  
Andressa Cecília Milanese ◽  
Kelly Cristina Coelho de Carvalho Benini ◽  
Maria Odila Hilário Cioffi ◽  
Herman Jacobus Cornelis Voorwald
Keyword(s):  
Epoxy Resin ◽  
Epoxy Composite ◽  
Low Cost ◽  
Natural Fibers ◽  
Polymeric Composites ◽  
Sisal Fiber ◽  
Processing Temperature ◽  
Scanning Calorimetry ◽  
Structural Applications ◽  
Sisal Fibers

Nowadays, polymeric composites reinforced with natural fibers are being considered in the civil engineering area. The use of polymeric composites to reinforce degraded timber structures can improve its behavior. Fibers with larger structural applications are glass and carbon but the use of natural fibers is an economical alternative and posses many advantages such as biodegradability, low cost and is derived from natural and renewable sources. Epoxy composite reinforced with sisal fabric was processed by resin transfer molding (RTM) at room temperature and this work studies thermal behavior and its respective mechanism of thermal decomposition. Samples of sisal fiber, epoxy resin and sisal/epoxy composite were characterized by Thermogravimetric Analysis (TGA) and Differential Scanning Calorimetry (DSC). Thermogravimetric curves showed that sisal fibers can be used in manufacturing process where the processing temperature does not exceed 177°C and shown that the epoxy resin has the greatest stability material followed by sisal/epoxy composite.

scholarly journals Effects of EPON on Mechanical and Thermal Properties of Epoxy Resins

2008 ◽  
Vol 47-50 ◽  
pp. 536-539 ◽  
Author(s):  
H. Ku ◽  
F. Cardona ◽  
D. Rogers ◽  
A. Vandenbroucke
Keyword(s):  
Thermal Properties ◽  
Epoxy Resin ◽  
Structural Engineering ◽  
Epoxy Composite ◽  
Low Cost ◽  
Mechanical And Thermal Properties ◽  
Scanning Calorimetry ◽  
Bending Tests ◽  
Three Point Bending ◽  
The Cost

Low cost composite materials are widely used in civil and structural engineering applications. This project uses EPON to plasticize a commonly used resin, epoxy resin to lower the cost of the composite and to find out the mechanical and thermal properties of the plasticized epoxy resin to see if it is suitable for the said applications. Three point bending tests were carried out to evaluate the flexural properties of the plasticized resins. Differential scanning calorimetry and dynamic mechanical thermal analysis are used to evaluate the thermal properties of the plasticized epoxy resin. The study with epoxy and EPON showed that the mechanical properties of the epoxy composite were lowered but its ability to dissipate energy increased because of its improved thermal properties. As EPON is much cheaper that epoxy resin, the composite produced is therefore cheaper and provided the service requirements were not so demanding, it can be used in the said applications.

Thermal Stability of Natural Fibers via Thermoset Coating for Application in Engineering Thermoplastics

2019 ◽  
Vol 809 ◽  
pp. 433-438 ◽  
Author(s):  
Natalie Vellguth ◽  
Tanja Rudeck ◽  
Madina Shamsuyeva ◽  
Franz Renz ◽  
Hans Josef Endres
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Epoxy Resin ◽  
Natural Fiber ◽  
Natural Fibers ◽  
Thermoplastic Composites ◽  
Processing Temperature ◽  
Scanning Calorimetry ◽  
Flax Fibers ◽  
Thermal Stability Of

An effective integration of natural fibers into engineering thermoplastics requires sufficient thermal stability of natural fibers during processing, since melting temperature of engineering thermoplastics lies above 200 °C. The aim of the work was to protect natural fibers from the heat of the molten thermoplastic via coating with a modified epoxy resin, thus enabling manufacture of natural fiber-reinforced engineering thermoplastic composites with minimized thermal degradation of the fibers. Processing temperature comprised the range of engineering thermoplastic polyamide 6 (PA6), which was 225 °C. Flax fabrics were spray coated with partially bio-based epoxy resin and incorporated via hot press technique into a PA6 matrix. The composite samples including spray coated flax fibers as well as the reference flax fibers without coating were characterized with regard to their mechanical properties, namely bending and tensile tests, thermal properties with differential scanning calorimetry (DSC) as well as thermogravimetric analysis (TGA) and optical via scanning electron microscopy (SEM) and computer tomography (CT). The results show that this approach enables manufacture of composites with reproducible mechanical properties, i.e. bending and tensile properties as well as enhanced thermal stabilities.

scholarly journals Sisal fiber as an alternative to the construction of flexible fiber filters applied to water treatment

2019 ◽  
Vol 9 (4) ◽  
pp. 608-615
Author(s):  
Alice K. M. Morita ◽  
Marco A. P. Reali
Keyword(s):  
Low Income ◽  
Aluminum Sulfate ◽  
Natural Fibers ◽  
Low Income Countries ◽  
Sisal Fiber ◽  
Internal Diameter ◽  
Flexible Fiber ◽  
Filtration System ◽  
Polyamide Fibers ◽  
Sisal Fibers

Abstract The recently developed flexible fiber filters (3Fs) are modular filtration units, which can satisfactorily remove solids at high filtration rates. Normally built with polyamide fibers, it is supposed that natural fibers can be used alternatively. This paper evaluated the performance of 3Fs using as filtering media sisal fibers in lieu of the polyamide ones. The sisal fibers were evaluated by means of scanning electronic microscopy and through solubility assays in hydrochloric acid and sodium hydroxide. Six filters with 28 mm of internal diameter were built, varying their length (25, 60, and 100 cm) and porosity (85 and 93%). The filtration system was fed with synthetic water, in-line coagulation was applied by the addition of 22.5 mg/L of aluminum sulfate, and filtration rates from 20 to 80 m/h were evaluated. Only the filter with 100 cm of length and 85% of porosity could work within the limit established (1 NTU), operating at 20 and 40 m/h. For all the studied configurations, the pressure drop was considerably low (less than 0.5 mH2O) when compared with 3Fs built with polyamide, which shows the potential of using this kind of filter as pre-filtration units or for less restrictive uses. This study showed that 3Fs can be adapted to include different configurations and materials, reducing their cost and making them appropriate for low-income countries.

Tensile Behavior of Epoxy Composites Reinforced with Thinner Sisal Fibers

2016 ◽  
Vol 869 ◽  
pp. 249-254
Author(s):  
Lazaro Araújo Rohen ◽  
Anna Carolina Cerqueira Neves ◽  
Frederico Muylaert Margem ◽  
Carlos Maurício Fontes Vieira ◽  
Fabio de Oliveira Braga ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Elastic Modulus ◽  
Polymer Matrix Composites ◽  
Low Cost ◽  
Natural Fibers ◽  
Tensile Behavior ◽  
Epoxy Composites ◽  
Matrix Composites ◽  
Synthetic Fibers ◽  
Sisal Fibers

The use of natural fibers as reinforcement in polymer matrix composites is replacing the use of synthetic fibers, especially from an environmental standpoint. Indeed, natural fibers are biodegradable and renewable, with no aggression to the environment. Moreover, they are worldwide abundant with relatively low cost. It was found that fine fibers of sisal, with the thinnest diameters can achieve tensile strength on the order of 1000 MPa. In this work, tensile specimens were prepared with 30% in volume of sisal fibers with diameters between 0.1 and 0.10mm incorporated in a continuous and aligned way into epoxy matrix. The results showed a significant increase in tensile strength and elastic modulus of the composites as a function of the incorporated amount of thinner sisal fibers.

Synthesis and Mechanical Characterization of Sisal-Epoxy and Hybrid-Epoxy Composites in Comparison with Conventional Fiber Glass-Epoxy Composite

2014 ◽  
Vol 984-985 ◽  
pp. 285-290
Author(s):  
K. Hari Ram ◽  
R. Edwin Raj
Keyword(s):  
Mechanical Strength ◽  
Mechanical Characterization ◽  
Natural Fiber ◽  
Epoxy Composite ◽  
Low Cost ◽  
Glass Fibers ◽  
Natural Fibers ◽  
Impact Testing ◽  
Natural Glass

Polymer composites reinforced with natural fibers have been developed in recent years, showing significant potential for various engineering applications due to their inherent sustainability, low cost, light weight and comparable mechanical strength. Sisal is a natural fiber extracted from leaves of Agave Sisalana plants and substituted for natural glass fiber. Six different combinations of specimens were prepared with sisal, sisal-glass and glass fibers with epoxy as matrix at two different fiber orientation of 0-90° and ±45°. Mechanical characterization such as tensile, flexural and impact testing were done to analyze their mechanical strength. It is found that the hybrid composite sisal-glass-epoxy has better and comparable mechanical properties with conventional glass-epoxy composite and thus provides a viable, sustainable alternate polymer composite.

scholarly journals The Influence of Alkaline Treatment of Recycled Natural Materials on the Properties of Epoxy Resin Composites

2018 ◽  
Vol 14 (4) ◽  
pp. 45-53
Author(s):  
Hamza M. Kamal ◽  
Mohammed J. Kadhim ◽  
Raeid K. Mohammed
Keyword(s):  
Epoxy Resin ◽  
Low Cost ◽  
Natural Fibers ◽  
Alkaline Treatment ◽  
Walnut Shell ◽  
Reinforced Composites ◽  
Jute Fibers ◽  
Naoh Solution ◽  
Shell Powder ◽  
Properties Of Composites

Natural fibers and particles reinforced composites are being broadly used due to their bio and specific properties such as low density and easy to machine and production with low cost. In this work, water absorption and mechanical properties such as tensile strength, flexural strength and impact strength of recycled jute fibers reinforced epoxy resin were enhanced by treating these fibers with alkaline solution. The recycled jute fibers were treated with different concentration of (NaOH) solution at (25 0C) for a period of (24) hours. From the obtained results, it was found that all these properties are improved when fibers treated with (7.5wt% NaOH) related to untreated fibers. Conversely, the mentioned properties of composites decreased after fibers treated with (10wt% NaOH). In addition, the hybrid composite with recycled jute fibers and recycled walnut shell powder showed obvious enhancement in the above-mentioned properties.

scholarly journals Properties of Fibrous Composites with Polyester: A Comparative Analysis Between Sisal Fiber and Pet

2020 ◽  
Vol 3 (4) ◽  
pp. 334-340
Author(s):  
Matheus Vinicius Falcão Moreira ◽  
Lorrane Carneiro Laranjeira Silva ◽  
Joyce Batista Azevedo ◽  
Pollyana da Silva Melo Cardoso ◽  
Josiane Dantas Viana Barbosa ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Raw Materials ◽  
Natural Fibers ◽  
Impact Resistance ◽  
Sisal Fiber ◽  
Reinforced Composites ◽  
Fiber Concentration ◽  
Synthetic Fibers ◽  
New Material ◽  
Sisal Fibers

Fiber-reinforced composites represent 75% of the application of these materials in several industrial segments. It has the purpose of improving technical characteristics and reducing environmental impact through the use of sustainable raw materials such as natural fibers and other fibers from industrial waste. In this sense, the objective of this work was to study and compare the mechanical properties of polyester composites (PL) reinforced with natural sisal fiber and residues of polyethylene terephthalate (PET) synthetic fibers. Initially, we evaluated the moisture and morphology of the fibers. The composites with PL matrix were obtained and the fiber concentration varied by 1%, 3%, and 5% by weight. In the composites, the mechanical properties under flexion and impact resistance were evaluated. We concluded that the level of reinforcement with sisal fibers did not significantly affect the mechanical properties. However, the PET fiber provided significant improvements in the properties of the composite. Thus, the composites reinforced with PET fiber residue have advantages in the development of new material with sustainable characteristics.  

Tensile and Statistical Analysis of Sisal Fibers for Natural Fiber Composite Manufacture

2015 ◽  
Vol 1115 ◽  
pp. 349-352 ◽  
Author(s):  
Md. Masudur R. Abir ◽  
S.M. Kashif ◽  
Md. Abdur Razzak
Keyword(s):  
Tensile Strength ◽  
Statistical Analysis ◽  
Natural Fiber ◽  
Fiber Composite ◽  
Natural Fibers ◽  
Young Modulus ◽  
Gage Length ◽  
Sisal Fiber ◽  
Natural Fiber Composite ◽  
Sisal Fibers

To achieve sustainability in the composite industry, natural fibers must be able to replace synthetic fibers .In this work the tensile properties of sisal fibers were determined. The relationships between tensile strength, young modulus, failure to strain and gage length was studied. Also variation in tensile strength was quantified using statistical analysis. The relationship between Weibull statistics and gage length were also investigated. The strength of the sisal fiber obtained in this work was between 255-377 MPA and decreased with an increase in gage length. The Weibull modulus obtained was similar for all gage lengths and was around 2.5.

Effects of Weave Type and Fiber Content on Physical Properties of Sisal Fiber/Epoxy Composites

2010 ◽  
Vol 123-125 ◽  
pp. 1139-1142 ◽  
Author(s):  
Sawitri Srisuwan ◽  
Pranee Chumsamrong
Keyword(s):  
Impact Strength ◽  
Physical Properties ◽  
Epoxy Resin ◽  
Flexural Modulus ◽  
Fiber Content ◽  
Epoxy Composites ◽  
Sisal Fiber ◽  
Pure Epoxy ◽  
Sisal Fibers ◽  
The Impact

In this study, the effects of weave type and fiber content on the physical properties of woven sisal fiber/epoxy composites were investigated. Sisal fibers used in this work were obtained from Nakhon Ratchasima, Thailand. Both untreated and alkali-treated fibers were employed. The woven sisal fibers were manufactured by hand weaving process. The fiber content in sisal fiber/epoxy composites were 3 wt.%, 5 wt.% and 10 wt.%. The composites were cured at room temperatures. In order to determine mechanical properties of the composites, flexural and impact tests were applied. Flexural strength and flexural modulus of all composites were higher than those of pure epoxy resin and tended to increase with increasing fiber content. The impact strength of all composites was lower than that of pure epoxy resin. The composites containing 10 wt.% sisal fibers showed the highest impact strength. There was no definite influence of weave type on flexural properties of the composites. At 3 and 5 wt.% fiber, the composites containing plain weave fibers seemed to show a higher impact strength than the composites containing other weave types.

scholarly journals Sensing Performance and Mechanical Properties of Buckypaper Impregnated with Epoxy Resin

Nanomaterials ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2258
Author(s):  
Shiuh-Chuan Her ◽  
Wei-Chun Hsu
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Epoxy Composite ◽  
Strain Sensitivity ◽  
Piezoresistive Effect ◽  
Thermogravimetric Analyzer ◽  
Structural Applications ◽  
Overall Performance ◽  
Sensing Performance ◽  
Better Than

Buckypaper consisting of a carbon nanotube (CNT) sheet has a great potential for sensing and structural applications due to the exceptional piezoresistive and mechanical properties of CNTs. In this work, buckypaper was impregnated with the epoxy resin to improve the fragility and handling capability. The mechanical properties of the buckypaper/epoxy composite were determined by the tensile and nanoindentation tests. A thermogravimetric analyzer (TGA) was used to evaluate the thermal stability. Strain and temperature sensing performances of the buckypaper/epoxy composite based on the piezoresistive effect were investigated using a meter source. Experimental results indicated that the elastic modulus and ultimate strength of the buckypaper/epoxy composite were increased by 82% and 194%, respectively, in comparison with the pristine buckypaper, while the strain and temperature sensitivities were decreased by 33% and 0.2%, respectively. A significant increase of the tensile strength accompanied with a moderate decrease of the strain sensitivity demonstrates that the overall performance of buckypaper/epoxy composite is better than that of pristine buckypaper.

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