Effect of Sisal Fiber-Snail Shell Hybrid Reinforcement on some Mechanical Properties and Moisture Uptake of Unsaturated Polyester Resin Based Composites

2020 ◽  
Vol 30 ◽  
pp. 87-99
Author(s):  
Isiaka Oluwole Oladele ◽  
Olakunle Timothy Betiku ◽  
Joseph Gbenga Akinseye ◽  
Baraka Abiodun Makinde-Isola
Keyword(s):  
Moisture Absorption ◽  
Unsaturated Polyester ◽  
Sisal Fiber ◽  
Hybrid Effect ◽  
Snail Shell ◽  
Chemically Modified ◽  
Polyester Matrix ◽  
Treated Fiber ◽  
Shell Particles ◽  
Hybrid Reinforcement

This study investigates the hybrid effect of chemically modified sisal fiber and snail shell particles on the performance of polyester composites. The sisal fiber used was extracted by soil retting method and some portions were treated with potassium hydroxide (KOH) and sodium hydroxide (NaOH) solutions, respectively. The snail shell was calcined before grinding and sieving into particle size of ˂75 μm. The composites were developed using randomly dispersed open mould technique by varying the reinforcements between 2-10 wt. %. The particulate snail shell was analyzed with XRF where it was discovered that Mn and Ni were the major constituents while the developed composites were also subjected to different tests in accordance with the existing ASTM standards. The results revealed that the incorporation of sisal fiber and snail shell particles in the polyester matrix resulted in better tensile and flexural properties. The performance of the materials in moisture environment showed that chemically modified sisal fiber samples reduce the tendency for moisture absorption. The influence of the modification was best for samples from KOH treated fiber compared to NaOH treated fiber. Hence, it was discovered that snail shell/modified sisal fiber aid the enhancement of the performance of the developed composites.

A new approach to chemically modified carboxymethyl chitosan and study of its moisture-absorption and moisture-retention abilities

2006 ◽  
Vol 102 (2) ◽  
pp. 1303-1309 ◽  
Author(s):  
Li-Ping Sun ◽  
Yu-Min Du ◽  
Xiao-Wen Shi ◽  
Xiao Chen ◽  
Jian-Hong Yang ◽  
...  
Keyword(s):  
Moisture Absorption ◽  
Carboxymethyl Chitosan ◽  
Moisture Retention ◽  
New Approach ◽  
Chemically Modified

Thermo Mechanical behaviour of Phenol Novolac Resin and Unsaturated Polyester Toughened Epoxy using nano Bentonite and Silica Nanoparticles

2020 ◽  
Vol 1 (3) ◽  
pp. 77-83
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Silica Nanoparticles ◽  
Moisture Absorption ◽  
Unsaturated Polyester ◽  
Physical And Mechanical Properties ◽  
Bending Test ◽  
Mechanical And Thermal Properties ◽  
Novolac Epoxy ◽  
Industrial Needs

Phenol novolac epoxy resin is a polymer matter which its properties can be modified for industrial needs. In this research, nanocomposites of phenol novolac epoxy resin and unsaturated polyester are made nano Bentonite and silica nanoparticles as filler. For this purpose, effect of nanoparticles percent on nanocomposite formation is studied and their physical, mechanical and thermal properties are obtained. The presence of unsaturated polyester in this process forms a cross-link capable of improving the physical and mechanical properties of epoxy resin. Fracture behavior was determined by a SEM device. Moreover, TGA, DSC, impact tests and bending test were applied for data analysis. When process ability is growing, moisture absorption decreases. Fracture toughness was also evaluated in a stoichiometric network. Physical and mechanical properties improve significantly with increasing nanoparticles. The most important reason for using this nanocomposite is its high resistance to corrosion.

scholarly journals Characterization of Polyester Nanocomposites Reinforced with Conifer Fiber Cellulose Nanocrystals

Polymers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 2838
Author(s):  
Grazielle da Silva Maradini ◽  
Michel Picanço Oliveira ◽  
Gabriel Madeira da Silva Guanaes ◽  
Gabriel Zuqui Passamani ◽  
Lilian Gasparelli Carreira ◽  
...  
Keyword(s):  
Cellulose Nanocrystals ◽  
Unsaturated Polyester ◽  
Cost Effective ◽  
Bending Test ◽  
X Ray Diffraction ◽  
Xrd Pattern ◽  
Glass Fiber Composites ◽  
Superior Mechanical Properties ◽  
Polyester Matrix

The application of cellulose nanocrystal has lately been investigated as polymer composites reinforcement owing to favorable characteristics of biodegradability and cost effectiveness as well as superior mechanical properties. In the present work novel nanocomposites of unsaturated polyester matrix reinforced with low amount of 1, 2, and 3 wt% of cellulose nanocrystals obtained from conifer fiber (CNC) were characterized. The polyester matrix and nanocomposites were investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD), bending test, and thermogravimetric analysis (TGA). The result showed that the addition of only 2 wt% CNC increased the nanocomposite flexural strength by 159%, the ductility by 500% and the toughness by 1420%. Fracture analyses by SEM revealed a uniform participation of the CNC in the polyester microstructure. The resistance to thermal degradation of the CNC reinforced nanocomposites was improved in more than 20 °C as compared to neat polyester. No significant changes were detected in the water absorptions and XRD pattern of the neat polyester with incorporations up to 3 wt% CNC. These results reveal that the 2 wt% CNC nanocomposite might be a promising more ductile, lightweight and cost-effective substitute for conventional glass fiber composites in engineering applications.

Morphology and properties of composite coating on mild steel: effect of bath temperature and snail shell weight composition

2019 ◽  
Vol 16 (2) ◽  
pp. 296-303
Author(s):  
Victor Sunday Aigbodion ◽  
Enyi C.C. ◽  
Akinlabi E.T. ◽  
Suleiman I.Y. ◽  
Ezema I.C. ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Design Methodology ◽  
Bath Temperature ◽  
Shell Weight ◽  
Uncoated Sample ◽  
Content Type ◽  
Snail Shell ◽  
Maximum Improvement ◽  
Shell Particles ◽  
Hardness Values

PurposeThis paper aims to investigate the parametric study of addition of snail shell particles (SSp) and bath temperature on the properties of Zn-ZnO-SSp composites coating.Design/methodology/approachBath temperatures of 60°C and 90°C and SSp of 0, 5, 10, 15, 20 and 25g were used in the electrodeposition. The microstructure, electrochemical, wear and hardness values of the coated samples were determined.FindingsHighest coating thickness of 240 µm, 277 per cent improvement in hardness values, 66.67 per cent improvement of wear rate were obtained at bath temperature of 60oC and 15gSSp addition over that of the uncoated sample. There was improvement in corrosion resistance after composites coating. Maximum improvement in the properties was obtained at bath temperature of 60°C at 15gSSp addition.Originality/valueIt has been established in this work that bath treatment and SSps improved the properties of the developed coating.

scholarly journals Moisture Absorption in Polymer Composites Reinforced with Vegetable Fiber: A Three-Dimensional Investigation via Langmuir Model

Polymers ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 1847 ◽  
Author(s):  
Brito ◽  
Santos ◽  
Correia ◽  
Queiroz ◽  
Tavares ◽  
...  
Keyword(s):  
Moisture Content ◽  
Polymer Composites ◽  
Layer Thickness ◽  
Moisture Absorption ◽  
Three Dimensional ◽  
Water Concentration ◽  
Langmuir Model ◽  
Sisal Fiber ◽  
Average Moisture Content ◽  
Material Surface

This work aims to study numerically the moisture absorption in polymer composite reinforced with vegetable fibers using the Langmuir model which considers the existence of free and entrapped water molecules inside the material. A three-dimensional and transient modeling for describing the water absorption process inside the composite and its numerical solution via finite volume method were presented and discussed. Application has been made for polymer composites reinforced with sisal fiber. Emphasis was given to the effect of the layer thickness of fluid close to the wall of the composite in the progress of water migration. Results of the free and entrapped solute (water) concentration, local moisture content and average moisture content, at different times of process, and inside the composite were presented and analyzed. It was verified that concentration gradients of the molecules (free and entrapped) are higher in the material surface, at any time of the process, and concentration of free solute is greater than the concentration of entrapped solute. It was verified that the water layer thickness surrounding the composite strongly affects the moisture absorption rate.

Impact Toughness Evaluation of Coir Mat Reinforced Unsaturated Polyester Composite

2013 ◽  
Vol 765-767 ◽  
pp. 3125-3129 ◽  
Author(s):  
Jia Yao ◽  
Li Wei Jiang ◽  
Ping Han ◽  
Da Shuai Zhou
Keyword(s):  
Impact Toughness ◽  
Random Distribution ◽  
Unsaturated Polyester ◽  
Mechanical Index ◽  
Weight Percentage ◽  
Polyester Composite ◽  
Toughness Evaluation ◽  
Polyester Matrix ◽  
The Impact ◽  
Better Than

Coir mat reinforced unsaturated polyester composites have been prepared and the impact toughness has been researched, and the impact toughness model has been established based on the coir weight percentage content, the change laws of each mechanical index have been detailed, thus the optimal solutions have been put forward when the coir content was from 10 wt.% to 35 wt.%. The toughening effect of coir mat on unsaturated polyester matrix is remarkable, the non-woven needle mat of coir as the reinforced body for unsaturated polyester matrix is better than that of random distribution coir form.

Sign in / Sign up

Export Citation Format

Share Document