scholarly journals Effect of Surface Biopolymeric Treatment on Sisal Fiber Properties and Fiber-Cement Bond

2017 ◽  
Vol 12 (2) ◽  
pp. 155892501701200 ◽  
Author(s):  
Paulo R. L. Lima ◽  
Heni Mirna Santos ◽  
Geany Peruch Camilloto ◽  
Renato Souza Cruz
Keyword(s):  
Water Absorption ◽  
Cellulose Acetate ◽  
Natural Fiber ◽  
Absorption Capacity ◽  
Surface Treatments ◽  
Bond Stress ◽  
Sisal Fiber ◽  
Fiber Properties ◽  
Study Results ◽  
Sisal Fibers

Sisal fiber, available in various semi-arid regions around the world, is the most studied natural fiber for the reinforcement of polymeric and cement-based composites. However, to improve the fiber–matrix interaction and to reduce the hydrophilicity of the fiber, it is necessary to establish surface treatments that employ sustainable materials, unlike conventional surface treatments. In this work, sisal fibers were coated separately with cellulose acetate, hydrophobic starch, and cassava starch biopolymers in order to verify the possibility of reducing the water absorption capacity of the fiber by the use of a biodegradable resin. A combination of Fourier transform infrared spectroscopy, scanning electron microscopy, and water absorption and tensile tests was used to investigate the effects of the surface treatments on the sisal fiber properties. Pullout tests of sisal fibers with embedded lengths of 20 mm and 40 mm were performed to determine the influence of the treatments on the bond stress with cement mortar. Composites with 4 vol % short fiber were produced and tested for flexion. The study results indicated that all treatments reduced the mechanical properties of the fiber; however, the layer of the cellulose acetate biopolymer film formed on the fiber surface was effective in reducing the fiber hydrophilicity. Experimental tests on the composites revealed that the cellulose acetate treatment reduced the bond stress and, to a lesser degree, the flexural toughness of the composite, despite the increase in flexural strength.

scholarly journals Investigations on the Mechanical Properties of Glass Fiber/Sisal Fiber/Chitosan Reinforced Hybrid Polymer Sandwich Composite Scaffolds for Bone Fracture Fixation Applications

Polymers ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1501 ◽  
Author(s):  
Soundhar Arumugam ◽  
Jayakrishna Kandasamy ◽  
Ain Umaira Md Shah ◽  
Mohamed Thariq Hameed Sultan ◽  
Syafiqah Nur Azrie Safri ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Glass Fiber ◽  
Bone Fracture ◽  
Hybrid Composite ◽  
Bone Structure ◽  
Hybrid Composites ◽  
Sisal Fiber ◽  
Composite Scaffolds ◽  
Study Results

This study aims to explore the mechanical properties of hybrid glass fiber (GF)/sisal fiber (SF)/chitosan (CTS) composite material for orthopedic long bone plate applications. The GF/SF/CTS hybrid composite possesses a unique sandwich structure and comprises GF/CTS/epoxy as the external layers and SF/CTS/epoxy as the inner layers. The composite plate resembles the human bone structure (spongy internal cancellous matrix and rigid external cortical). The mechanical properties of the prepared hybrid sandwich composites samples were evaluated using tensile, flexural, micro hardness, and compression tests. The scanning electron microscopic (SEM) images were studied to analyze the failure mechanism of these composite samples. Besides, contact angle (CA) and water absorption tests were conducted using the sessile drop method to examine the wettability properties of the SF/CTS/epoxy and GF/SF/CTS/epoxy composites. Additionally, the porosity of the GF/SF/CTS composite scaffold samples were determined by using the ethanol infiltration method. The mechanical test results show that the GF/SF/CTS hybrid composites exhibit the bending strength of 343 MPa, ultimate tensile strength of 146 MPa, and compressive strength of 380 MPa with higher Young’s modulus in the bending tests (21.56 GPa) compared to the tensile (6646 MPa) and compressive modulus (2046 MPa). Wettability study results reveal that the GF/SF/CTS composite scaffolds were hydrophobic (CA = 92.41° ± 1.71°) with less water absorption of 3.436% compared to the SF/CTS composites (6.953%). The SF/CTS composites show a hydrophilic character (CA = 54.28° ± 3.06°). The experimental tests prove that the GF/SF/CTS hybrid composite can be used for orthopedic bone fracture plate applications in future.

Study on the Bio-Composite from Sisal Fiber Reinforced Cellulose Acetate

2012 ◽  
Vol 535-537 ◽  
pp. 2301-2306 ◽  
Author(s):  
Ai Ju Jiang ◽  
Xiao Qiang Xu ◽  
Hong Wu Wu
Keyword(s):  
Cellulose Acetate ◽  
Interfacial Adhesion ◽  
Sisal Fiber ◽  
Initial Length ◽  
Hot Press ◽  
Biodegradation Rate ◽  
Twin Screw Extrusion ◽  
Screw Extrusion ◽  
Twin Screw ◽  
Sisal Fibers

In this paper, sisal fibers (SF) reinforced cellulose acetate composites were prepared using twin-screw extrusion followed by hot-press moulding technology. Both the mechanical properties and the biodegradable rate of the composite were investigated in terms of effect of initial length and mass content percentage of sisal fiber on. The results showed that the fibers tended to be shorter and thinner during the processing of twin-screw blending and the tensile and flexure strength of composites were enhanced, with the content or initial length of sisal fibers increasing. Furthermore, the biodegradation rate of the composite was forward at first, and gradually became slow in later period and then leveled off finally. In addition, Micro-morphologies of the fracture surface of the composite were visualized by scanning electron microscopy (SEM) to analyze the effect of initial length and content of sisal fibers on interfacial adhesion and the distribution of sisal fibers in the composites.

scholarly journals Impact of Surface Modification and Nanoparticle on Sisal Fiber Reinforced Polypropylene Nanocomposites

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Idowu David Ibrahim ◽  
Tamba Jamiru ◽  
Emmanuel Rotimi Sadiku ◽  
Williams Kehinde Kupolati ◽  
Stephen Chinenyeze Agwuncha
Keyword(s):  
Water Absorption ◽  
Weight Ratio ◽  
Tensile Modulus ◽  
High Strength ◽  
Sisal Fiber ◽  
Plant Fibers ◽  
Environmental Friendliness ◽  
Polypropylene Nanocomposites ◽  
Fiber Treatment ◽  
Sisal Fibers

The use of plant fibers, polymer, and nanoparticles for composite has gained global attention, especially in the packaging, automobile, aviation, building, and construction industries. Nanocomposites materials are currently in use as a replacement for traditional materials due to their superior properties, such as high strength-to-weight ratio, cost effectiveness, and environmental friendliness. Sisal fiber (SF) was treated with 5% NaOH for 2 hours at 70°C. A mixed blend of sisal fiber and recycled polypropylene (rPP) was produced at four different fiber loadings: 10, 20, 30, and 40 wt.%, while nanoclay was added at 1, 3, and 5 wt.%. Maleic anhydride grafted polypropylene (MAPP) was used as the compatibilizer for all composites prepared except the untreated sisal fibers. The characterization results showed that the fiber treatment, addition of MAPP, and nanoclay improved the mechanical properties and thermal stability and reduced water absorption of the SF/rPP nanocomposites. The tensile strength, tensile modulus, and impact strength increased by 32.80, 37.62, and 5.48%, respectively, when compared to the untreated SF/rPP composites. Water absorption was reduced due to the treatment of fiber and the incorporation of MAPP and nanoclay.

Natural Fiber Reinforced Plastic Foams from Plant Oil-Based Resins

2008 ◽  
Vol 47-50 ◽  
pp. 149-152 ◽  
Author(s):  
Min Zhi Rong ◽  
Su Ping Wu ◽  
Ming Qiu Zhang
Keyword(s):  
Natural Fiber ◽  
Sisal Fiber ◽  
Fiber Reinforced ◽  
Plant Oil ◽  
Soil Burial ◽  
Plastic Foams ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic ◽  
Compressive Performance ◽  
Sisal Fibers

In this work, a simple but effective approach was reported for preparing natural fiber reinforced plastic foams based on plant oil with excellent compressive performance and biodegradability. Firstly, epoxidized soybean oil (ESO) was converted into its acrylate ester AESO, which can be free-radically copolymerized with reactive diluents like styrene to give thermosetting resins and their foam plastics. Then the bio-foam composites were produced using short sisal fiber as the reinforcement. Effects of fiber loading, length and surface treatment on properties of the foam composites were investigated. It was found that exposure of the fibers to gas cells of the foam reduced the effectiveness of interfacial effect, which is different from conventional bulk composites. As a result, reinforcing ability of sisal fibers became a function of fiber length, loading, etc. Furthermore, the plastic foams based on plant oil resin were proved to be biodegradable in soil burial or in the presence of fungi.

Evaluation of Interfacial Properties of Sisal Fiber Reinforced High Density Polyethylene (HDPE) Composites

2007 ◽  
Vol 334-335 ◽  
pp. 625-628 ◽  
Author(s):  
Yan Li ◽  
Hong Xia Deng ◽  
Ye Hong Yu
Keyword(s):  
Natural Fiber ◽  
Fiber Surface ◽  
Interfacial Properties ◽  
Sisal Fiber ◽  
Fiber Reinforced ◽  
Statistical Parameters ◽  
Pull Out ◽  
Bonding Properties ◽  
Fiber Surface Treatment ◽  
Sisal Fibers

Statistical methods were employed to study the structure characteristics of sisal fibers. Two types of fiber surface treatment methods, namely chemical bonding and oxidization were used to improve the interfacial bonding properties of sisal fiber reinforced HDPE (sisal/HDPE) composites. Interfacial properties were evaluated by single fiber pull out test. The interfacial shear strength (IFSS) was calculated and analyzed by the statistical parameters. The results were compared with those obtained by traditional ways. A novel method which could more accurately evaluate the interfacial properties between natural fiber and polymeric matrices was proposed.

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.

scholarly journals Durability Study of Hybrid Fiber Reinforced Concrete

2021 ◽  
Vol 11 (1) ◽  
pp. 59-69
Author(s):  
Srinivasa Rao Naraganti
Keyword(s):  
Reinforced Concrete ◽  
Water Absorption ◽  
Cement Composite ◽  
Strength Loss ◽  
Fiber Reinforced Concrete ◽  
Sisal Fiber ◽  
Fiber Reinforced ◽  
Acid Attack ◽  
Chloride Permeability ◽  
Sisal Fibers

Sisal has been reported as one of the promising fibers for cement composite applications. The durability of sisal fiber reinforced concrete (SFRC) and steel sisal fiber reinforced concrete (SSFRC) have not been reported. Water absorption, rapid chloride permeability, and acid attack tests are conducted on fibrous cement composites. Steel, polypropylene, and sisal fibers with a total volume of 0.50%, 1.00%, 1.25%, and 1.50% were used. Sisal at a content of 1.50% in SFRC increases the water absorption by 76%, but it is reduced to 30% for SSFRC with 0.2% of sisal content. SFRC and SSFRC show the increased permeability of 1.69% and 2.09% respectively. SFRC experiences the highest volume loss of 6.52%. SSFRC illustrates the resistance to the mass loss and compressive strength loss. In conclusion, untreated sisal in any form is found to be not advantageous for durable fibrous concrete structures.

Water Absorption in Sisal Fiber Reinforced-Polymeric Matrix Composites: Three-Dimensional Simulations and Experiments

2018 ◽  
Vol 20 ◽  
pp. 143-154
Author(s):  
D. Gomes dos Santos ◽  
A.G. Barbosa de Lima ◽  
P. de Sousa Costa ◽  
E. Santana de Lima ◽  
G. Moreira ◽  
...  
Keyword(s):  
Water Absorption ◽  
Polymer Composite ◽  
Three Dimensional ◽  
High Water ◽  
Water Bath ◽  
Sisal Fiber ◽  
Matrix Composites ◽  
Polyester Matrix ◽  
Sisal Fibers ◽  
Polymeric Matrix Composites

In this work was conducted a theoretical and experimental study of water absorption in polyester matrix composites reinforced with sisal fiber at temperatures of 25, 50 and 70°C. A fiber content 44.6% sisal fibers, and 55.4% polyester matrix were used in the manufacture of the polymer composite. The dimensions of the composite were 20x20x3mm3and 20x20x6mm3. Water absorption tests were conducted by immersion of the samples in a distilled water bath and the water uptake calculated by weight difference of the samples in the dry and wetted condition at different elapsed time. A three-dimensional mathematical model was developed to predict mass transfer during the water absorption inside the parallelepiped solid. Results of water absorption kinetic and moisture content distribution inside the composites showed the more favorable areas which presents delamination problems due the weakness of the fiber-matrix interface and consequently, reduction in the mechanical properties. It was found that the high water bath temperatures accelerate the absorption process and that the water absorption of the sisal reinforced polymer composite with 3 mm of thickness was faster than the with 6 mm of thickness.

Sign in / Sign up

Export Citation Format

Share Document