Jute Fiber Reinforced Polyester Composites Research Articles

Delamination and surface roughness analysis of jute/polyester composites using response surface methodology: Consequence of sodium bicarbonate treatment

The present research work explores the consequence of eco-friendly sodium bicarbonate treatment on drilling behavior of jute fiber reinforced polyester composites. The fiber surface treatment was done by immersing the jute fibers in sodium bicarbonate solution (10 wt.%) for five days at room temperature. The raw and treated jute fiber composites were produced through compression molding process. The drilling behavior was expressed in terms of delamination factor (at entry and exit) and surface finish. The response surface methodology coupled with three factors—three levels Box–Behnken Design was used to study the interactive effects of process variables (drill diameter, feed, and cutting speed) on delamination factor and surface finish. Furthermore, the significance of the developed model was examined through analysis of variance. The chip morphology of the fabricated composites was examined to assess the quality of the drilled hole. The fractography analysis of the machined surface has also been carried using scanning electron microscopy. The outcomes revealed that the sodium bicarbonate treatment of jute fiber improved the machinability of the composites.

Optimizing the Fabric Architecture and Effect of γ-Radiation on the Mechanical Properties of Jute Fiber Reinforced Polyester Composites.

The fiber architecture can significantly influence the rate of impregnation of a resin in making composites and the load-bearing ability of individual fibers on testing of the loading directions. Moreover, achieving the maximum mechanical performance of a natural fiber composite selection of yarn liner density and optimization of fabric structure and further modification of the composites remains a great challenge for the composite research community. In this study, a number of jute-based woven derivatives (plain, 2/1 twill, 3/1 twill, zigzag based on a 2/2 twill, and diamond based on a 2/2 twill) have been constructed from similar linear densities of yarn. The effect of the fabric architecture and further modification of optimized composites by applying γ-radiation is also explained in this study. The experimental results show a 54% increase in tensile strength, a 75% increase in tensile modulus, a 69% increase in flexural strength, a 124% increase in flexural modulus, and 64% increase in impact strength of twill (3/1) structured jute fiber polyester composites in comparison to other plain and twill structured composites. A further mechanical improvement of around 20–30% is possible for the optimized twill structured composites by applying γ-radiation on the composites. An FTIR, TGA, and SEM study confirms the chemical, thermal, and fractographic changes after applying the modification of composites.

Experimental Investigations to Promote Better Adaptability of Safety Helmets Using Jute Fiber Reinforced Polyester Composites– A Waste Utilization Approach

ABSTRACT Injuries and accidents that occur in the workplace are also due to improper usage of Personal Protective Equipment’s (PPE). This research made an attempt to investigate the behavior and attitude of the worker toward PPE. Risk associated with the non-usage of PPE is quantified using the likelihood and severity values of the hazards and it is found that safety helmets have higher risk value of 28. A qualitative approach say face-to-face interviews done to know the underlying reasons for avoiding the use of safety helmets and it is identified that discomfort is the major reason behind the negligence of safety helmets. In order to address this issue jute reinforced polyester composite helmet is fabricated with 44% of jute fiber and the remaining percentage of polyester resin using hand lay-up technique. Shock absorption test in the composites (44% of fiber and 56% of polyester) exhibited cracks on the top layer of the shell, so in order to further enhance the strength of composites bio char of 5% and 10% is added as filler and it is noted that the biochar-based helmet shows improved strength. The results satisfy the requirements as mentioned in Indian standards and helps in environmental sustainability.

Utilization of Taguchi Technique to Enhance the Interlaminar Shear Strength of Wood Dust Filled Woven Jute Fiber Reinforced Polyester Composites in Cryogenic Environment

ABSTRACT The characteristics of natural fiber reinforced composites such as light weight, non-abrasive, nonflammable, nontoxic, low cost and biodegradable have grabbed the attention of current researchers in the area of composites. The objective of this study is to examine the interlaminar shear strength of the polyester based wood and woven jute hybrid composite. To accomplish this objective, the following parameters such as (i) wood density, (ii) wood weight ratio, (iii) woven jute type, (iv) number of jute layers, (v) cryogenic treatment duration and (vi) alkaline treatment duration, each at three different levels were picked and optimized using the Taguchi method. The fibers were pretreated with 5% of NaOH solution for different length of time to reduce the moisture absorption. The L27 orthogonal array was selected for the chosen parameters and the required composite materials were fabricated using hand lay-up techniques. The fabricated composites were then subjected to cryogenic treatment by immersing in liquid nitrogen at 77 K for different period of time. The interlaminar shear strength of the fabricated hybrid composites was done according to ASTM standard. The morphological features and degree of dispersions of fibers into the matrix of the fabricated hybrid composites were further studied and discussed.

Use of waste copper slag filled jute fiber reinforced composites for effective erosion prevention

This work addresses the erosion performance of waste copper slag filled jute fiber reinforced polyester composites. The composites are prepared by two different fiber treatment methods such as sodium hydroxide (NT) and calcium hydroxide (CT) and the results are compared with the specimen prepared by untreated fiber (UT). The fiber dosage of 40% and the waste copper slag filler materials of 10% are used to prepare the composites. A compression molding machine with an optimum pressure of 17 MPa is used for the fabrication process. Erosion tests are conducted on an erosion test rig by varying the input process parameters such as impingement angle (30°, 60°, 90°) and jet pressure (70, 100, 130 m/s). The experimental result shows that use of copper slag filler particles increased the interfacial bond between the matrix and fiber resulting to erosion prevention. A regression model has been developed for each composite to predict the future values. Further, the desirability analysis was performed and found that the CT composite with impingement angle at 90° and jet velocity at 86.36 m/s could achieve lower erosion rate. Finally, the erosion mechanism of the eroded surface of the composite has been studied using scanning electron microscope and 3D surface profilometry images.

Experimental and Micromechanical ThermalCharacteristics of Jute Fiber Reinforced Polyester Composites

Abstract An understanding of the thermal analysis of natural fiber reinforced polymer composites is extremely important in the structure-property relationship and industrial production. The temperature dependent properties such as thermal conductivity, thermal diffusivity and specific heat are an important and plays a significant role in determining their heat conduction/insulation capability. In this paper, short jute fiber reinforced polyester composites were prepared by varying the fiber loading (0–40 wt.%). The physical and thermal characteristics were evaluated as per ASTM standards. The experimental thermal conductivity results were validated with the results obtained by analytical methods existing in the literature. The analytical methods like rule of mixture, geometric mean, and Lewis and Nielsen approaches have been used to evaluate the properties of composite material. The thermal conductivity values predicted by analytical methods are in good agreement with the experimental results and observed an acceptable range. The density of the jute fiber composites was increases with increase in the fiber loading. The specific heat capacity and thermal diffusivity of the jute fiber composites were decreases with increase in the fiber loading. The results indicated that jute fiber reinforced polyester composites were suitable for building components and automobiles in order to reduce the energy consumption.

Strength Analysis of E-Glass and Jute Fiber Reinforced Polyester Composites

Strength Analysis of E-Glass and Jute Fiber Reinforced Polyester Composites

Dual Reinforcement Effect of Nanoclay and Jute Fiber on the Mechanical Properties of Polyester Resin

The research work aims in analysing the effect of minimal loading of nanoclay in altering the mechanical properties of jute fiber reinforced polyester (JFRP) composites. Nanoclay content of 0.5 Wt.% has been constantly maintained for polyester composites containing 5 and 7.5 Wt.% jute fibers. Nanoclay was incorporated in polyester resin by magnetic stirring at 80°C for 3 hours. Further, the JFRP composites were fabricated by a conventional method known as hand lay-up method. Nanoclay filled polyester-jute fiber composites showed enhancement in tensile, flexural, impact strength and modulus of elasticity compared to pure, fiber reinforced polyester and nanoclay filled resin. Uniform distribution of nanoclay in the polyester matrix may form a strong physical interaction at the interface between the fiber and matrix. Surface morphology of the tensile fractured surface viewed through scanning electron microscopy (SEM) proved less fiber pull-out due to presence of nanoclay.

Hybridization effect on mechanical properties of short basalt/jute fiber-reinforced polyester composites

Abstract Mechanical properties of fiber reinforcement that can be obtained by the introduction of basalt fibers in jute fiber-reinforced polyester composites have been analyzed experimentally. Basalt/jute fiber-reinforced hybrid polymer composites were fabricated with a varying fiber percentage by using compression molding techniques. The fabricated composite plates were subjected to mechanical testing to estimate tensile strength, flexural strength and impact strength of the composites. The effect of fiber content on basalt/jute fiber in the composites has been studied. Addition of jute fiber into basalt fiber composite makes it a cost-effective one. Incorporation of basalt fiber into the composites was at approximately 10%, 20%, up to 90%, and the jute fiber percentage was reduced from 90%, 80%, to 10% correspondingly. Mechanical properties were investigated as per ASTM standards. Tensile and flexural strengths were tested by using a computer-assisted universal testing machine, and impact strength by using an Izod impact tester. It has been observed that the addition of jute fiber to the basalt fiber polyester composites enhanced the mechanical properties. Water absorption of hybrid composites was also analyzed and was found to be proportional to fiber percentage.

Study of jute fiber reinforced polyester composites by dynamic mechanical analysis

Cyanoethylation of jute fibers in the form of nonwoven fabric was studied, and these chemically modified fibers were used to make jute–polyester composites. The dynamic mechanical thermal properties of unsaturated polyester resin (cured) and composites of unmodified and chemically modified jute–polyester were studied by using a dynamic mechanical analyzer over a wide temperature range. The data suggest that the storage modulus and thermal transition temperature of the composites increased enormously due to cyanoethylation of fiber. An increase of the storage modulus of composites, prepared from chemically modified fiber, indicates its higher stiffness as compared to a composite prepared from unmodified fiber. It is also observed that incorporation of jute fiber (both unmodified and modified) with the unsaturated resin reduced the tan δ peak height remarkably. Composites prepared from cyanoethylated jute show better creep resistance at comparatively lower temperatures. On the contrary, a reversed phenomenon is observed at higher temperatures (120°C and above). Scanning electron micrographs of tensile fracture surfaces of unmodified and modified jute–polyester composites clearly demonstrate better fiber–matrix bonding in the case of the latter. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 71: 1505–1513, 1999