The Effects of Fiber Content in Plasticized Polyvinyl Alcohol (PVA) - Sweet Potato Peel Blends

2014 ◽  
Vol 699 ◽  
pp. 131-135
Author(s):  
Mohd Shahrul Nizam Salleh ◽  
Norzila Mohd ◽  
Zarina Omar ◽  
Sopiah Ambong Khalid ◽  
Norkamruzita Saadon ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Polyvinyl Alcohol ◽  
Sweet Potato ◽  
Interfacial Adhesion ◽  
Sem Analysis ◽  
Fiber Content ◽  
Test Results ◽  
Potato Peel ◽  
Casting Method ◽  
Melt Mixing

The effects of fiber content in sweet potato peel-plasticized polyvinyl alcohol blends were investigated. Plasticized Polyvinyl Alcohol (PPVA) was blended with Sweet Potato Peel (SPP). Prior to compounding process, PVA was plasticized with 30 phr glycerol as well as 10 phr distilled water. Blends of PPVA at composition of 80%, 70%, 60%, 50% and 40% of SPP were compounded using melt mixing equipment with an additional of 20 phr glycerol. A casting method was used to prepare the PPVA-SPP film sheet. Based on the tensile test results, PPVA with 80% SPP recorded the lowest tensile strength (5.385 MPa) as compared to blends which contain 40% SPP (13.612 MPa). The reduction of tensile strength with the addition of SPP was due to poor interfacial adhesion between the PVA and SPP which was proven by Scanning Electron Microscopy (SEM) analysis.

Comparison of Starch Fiber Filled-Polyvinyl Alcohol and Native Starch Filled-Polyvinyl Alcohol under Tensile Analysis

2015 ◽  
Vol 1113 ◽  
pp. 19-22 ◽  
Author(s):  
Mohd Salleh Shahrul Nizam ◽  
Norzila Mohd ◽  
Zarina Omar ◽  
Norkamruzita Saadon
Keyword(s):  
Tensile Strength ◽  
Polyvinyl Alcohol ◽  
Interfacial Adhesion ◽  
Continuous Phase ◽  
Distilled Water ◽  
Solution Casting ◽  
Test Results ◽  
Casting Method ◽  
Native Starch ◽  
Solution Casting Method

The tensile properties of starch fiber (SF) and native starch (NS) filled polyvinyl alcohol were investigated in this study. Polyvinyl Alcohol (PVA) was blend with starch fiber as well as native starch. Prior to compounding process, PVA was plasticized with 30 phr glycerol as well as 10 phr distilled water. A solution casting method was used to prepare the SF-PPVA and NS-PPVA film sheet. Based on the tensile test results SF filled PVA recorded the highest tensile strength (20.015 MPa) as compared to NS filled PVA (12.302MPa). The tensile strength of the blends film was depending to the interfacial adhesion between matrixes in the blends. In spite of that, NS filled PVA have noted the highest elongation during the test. SF and NS played important role in affecting the blends matrix through disturbing the arrangement of continuous phase of PVA.

scholarly journals Absorption and Strength Properties of Short Carbon Fiber Reinforced Mortar Composite

Buildings ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 300
Author(s):  
Md. Safiuddin ◽  
George Abdel-Sayed ◽  
Nataliya Hearn
Keyword(s):  
Tensile Strength ◽  
Carbon Fiber ◽  
Water Absorption ◽  
Carbon Fibers ◽  
Strength Properties ◽  
Fiber Content ◽  
Test Results ◽  
Air Content ◽  
Entrapped Air ◽  
Short Carbon

This paper presents the water absorption and strength properties of short carbon fiber reinforced mortar (CFRM) composite. Four CFRM composites with 1%, 2%, 3%, and 4% short pitch-based carbon fibers were produced in this study. Normal Portland cement mortar (NCPM) was also prepared for use as the control mortar. The freshly mixed mortar composites were tested for workability, wet density, and entrapped air content. In addition, the hardened mortar composites were examined for compressive strength, splitting tensile strength, flexural strength, and water absorption at the ages of 7 and 28 days. The effects of different carbon fiber contents on the tested properties were observed. Test results showed that the incorporation of carbon fibers decreased the workability and wet density, but increased the entrapped air content in mortar composite. Most interestingly, the compressive strength of CFRM composite increased up to 3% carbon fiber content and then it declined significantly for 4% fiber content, depending on the workability and compaction of the mortar. In contrast, the splitting tensile strength and flexural strength of the CFRM composite increased for all fiber contents due to the greater cracking resistance and improved bond strength of the carbon fibers in the mortar. The presence of short pitch-based carbon fibers significantly strengthened the mortar by bridging the microcracks, resisting the propagation of these minute cracks, and impeding the growth of macrocracks. Furthermore, the water absorption of CFRM composite decreased up to 3% carbon fiber content and then it increased substantially for 4% fiber content, depending on the entrapped air content of the mortar. The overall test results suggest that the mortar with 3% carbon fibers is the optimum CFRM composite based on the tested properties.

scholarly journals Physico-Mechanical, Morphological Properties of Polyvinyl Alcohol/Palm Kernel Shell/Coconut Kernel Shell Elastomeric Polymer Nanocomposites

2018 ◽  
Vol 5 (2) ◽  
pp. 296-303
Author(s):  
Josephine Chang Hui Lai ◽  
Nor Liyana Yusof
Keyword(s):  
Polyvinyl Alcohol ◽  
Polymer Nanocomposites ◽  
Moisture Absorption ◽  
Palm Kernel ◽  
Morphological Properties ◽  
Test Results ◽  
Casting Method ◽  
Palm Kernel Shell ◽  
Coconut Kernel ◽  
Solution Casting Method

In this study, the physico-mechanical and morphological properties of polyvinyl alcohol/palm kernel shell/coconut kernel shell elastomeric polymer nanocomposites (PVA/PKS/CKS EPNCs) were investigated. PVA/PKS/CKS EPNCs were prepared via solution casting method and the properties of the elastomeric polymer nanocomposites were characterized through Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), tensile testing and moisture absorption test. Test results showed that increasing the PVA content increased the mechanical properties of elastomeric polymer nanocomposites as well as provided better surface morphology. However, beyond certain percentage of PVA content, the moisture absorption increased too. Therefore, 55wt% of PVA/PKS/CKS EPNCs was chosen as the best elastomeric polymer nanocomposites as it had the best overall properties from the aspect of physico-mechanical, morphological and moisture absorption.

scholarly journals Studying the effect of silica (SiO2) addition on the adhesive properties of polyvinyl alcohol

2019 ◽  
Vol 14 (29) ◽  
pp. 107-124
Author(s):  
Nahida J. Hameed
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Shear Strength ◽  
Polyvinyl Alcohol ◽  
The Other ◽  
Casting Method ◽  
Adhesive Properties ◽  
Adhesive Material ◽  
Vulcanized Rubber ◽  
Adhesive Characteristic

The work concerned with studying the effect of (SiO2) addition as afiller on the adhesive properties of (PVA). Samples were prepared assheets by using casting method. The mechanical properties showedthat increase in tensile strength from (34MPa) to (68MPa) when(SiO2) added to (PVA). The adhesive strength showed that jointproperties depend upon specific adhesive characteristic of material(PVA) and (SiO2\PVA)composites at different concentrations (1.5%,2.5%, 3.5%, 4.5wt%), the cohesive strength of the adhesive material,the joint design, and adherent type (Sponge Rubber(SR), Naturalleather (NL), Vulcanized Rubber(VR), and Cartoon). The resultsproved the tensile strength increased with (SiO2) ratio, so it can beused as the adhesive material. Shear strength showed an increasewith (SiO2) ratio of sponge rubber, and cartoon adherent, whereas itwas increased up to 2.5% for Natural Leather, and VulcanizedRubber then decreased; That suggested it is most suitable for spongerubber adhesive and cartoon than the other adherents.

Effect of Degassing Time and Cooling Rate on Microstructure and Porosity of Aluminum 6061 Alloy Using Sand Casting Method

2019 ◽  
Vol 964 ◽  
pp. 124-129 ◽  
Author(s):  
Wikan Jatimurti ◽  
Boby Alexander ◽  
Alvian Toto Wibisono
Keyword(s):  
Tensile Strength ◽  
Cooling Rate ◽  
Raw Materials ◽  
Liquid Aluminum ◽  
Sand Casting ◽  
The Other ◽  
Test Results ◽  
Casting Method ◽  
Porosity Level ◽  
Aluminum 6061 Alloy

This research is aimed to get a better understanding on the effort of reducing the porosity level in aluminum alloys. The degassing process (2, 5 and 8 minutes) is done to reduce the hydrogen content in liquid aluminum and cooling rate modifications (13 °C / min, 20 °C / min and 26 °C / min) was performed to reduce the porosity by reducing the size of Dendrite Arm Spacing (DAS). The casting method used in this research is sand casting and raw materials were melted using an electric furnace at 720 °C. The microstructural images showed the DAS size are decreased by size from 137.3 μm to 87.58 μm obtained from cooling rates of 13 °C / min and 26 °C / min respectively. In the other hand, the level of porosity is also decreased from 3.58% at 2 min degassing and the cooling rate of 13 °C / min to 1.8% at 5 min degassing and 26 °C / min cooling rate. Furthermore, the tensile test results show that the value of tensile strength increases when the DAS size and porosity level are smaller. The highest ultimate tensile strength value is 105.9 and the lowest is 70,53 MPa.

scholarly journals Sweet Potato Peel Flour Applications in The Textural Quality of Waffle Ice Cream Cone and Other Food Products

2020 ◽  
Vol 1 (2) ◽  
Author(s):  
Zanariah Mohd Dom ◽  
Nurul Atikah Mohd Zulkeple Amin ◽  
Roslizah Kadir Basha
Keyword(s):  
Tensile Strength ◽  
Sweet Potato ◽  
Wheat Flour ◽  
Textural Properties ◽  
Ice Cream ◽  
Food Products ◽  
Physical Analysis ◽  
Potato Peel ◽  
Food Applications

Sweet potatoes are nutritious vegetables commonly grown in Malaysia. However, its beneficial skins are mostly peeled and thrown away. The sweet potato peel has a slightly bitter taste with its good nutritional food value in producing healthy food products. In this study, sweet potato peel flour (SPPF) is added to the existing wheat flour in the formulation of ice cream waffle cones. The amount of wheat flour added in the mixture depends on the SPPF amount added. Preliminary study on the content of protein, moisture, crude fiber, protein, carbohydrate and fat were conducted and determined. Then, the SPPF was added based on the formulation of 5%, 10% and 15% addition to the wheat flour at 95%, 90% and 85%, respectively, in a batter mix formulation for the making of ice cream waffle cones. The control was made out of 100% wheat flour, in order to compare with the newly formulated ice cream waffle cones batter mixture. Addition of SPPF has impacted the quality of waffle ice cream cone in regards to its physicochemical properties such as colour, odour, tensile strength and textural properties. As the results, waffle cones of SPPF had lower value of L*, a* and b*, which turned darker than a controlled sample. The 5% formulation of sweet potato peel flour (SPPF) resulted to the highest crispiness of the waffle cones. Tensile strength of fiber materials in sweet potato peels flour became stable and balanced with the cone structure. Overall SPPF formulated waffle cones have passed the physical analysis and food applications’ requirements. As the SPPF have high value in water holding capacity, it can contribute to other food applications.

scholarly journals Microwave Absorbent Packaging Material from Composites Chitosan-Polyvinyl Alcohol Polymer

2014 ◽  
Vol 17 (2) ◽  
Author(s):  
Bambang - Riyanto ◽  
Akhiruddin - Maddu ◽  
Esa Ghanim Fadhallah
Keyword(s):  
Tensile Strength ◽  
Polyvinyl Alcohol ◽  
Reflection Loss ◽  
Sem Analysis ◽  
Packaging Material ◽  
Packaging Materials ◽  
Loss Measurement ◽  
Average Value ◽  
Chitosan Concentration ◽  
Microwave Reflection

Microwave absorbent packaging materials currently tend to biomaterial. Chitosan is a dielectric biomaterial with polycationic properties. The aim of this study was to analyze characteristics of microwave absorbing packaging material made from composite chitosan-polyvinyl alcohol (PVA) polymer. The ability of the packaging material to absorb microwave was determined by reflection loss measurement. Formed packaging prototype resembles as a thin transparent yellowish plastic with thickness (0.11-0.22 mm) and the tensile strength (106.33±2.82-143.00±2.59 kPa). SEM analysis showed homogenous structure characterized by interaction between chitosan and PVA. Optimum absorption value was obtained from chitosan concentration of 1%, with average value of reflection loss was (-31.9289±4.0094) dB.<br />Keywords: chitosan, material packaging, microwave, reflection loss

scholarly journals Tensile Strength and Moisture Resistance Properties of Biocomposite Films Based on Polyvinyl Alcohol (PVA) with Cellulose as Reinforcement from Durian Peel Fibers

2021 ◽  
Vol 302 ◽  
pp. 02001
Author(s):  
Melbi Mahardika ◽  
Mochamad Asrofi ◽  
Devita Amelia ◽  
Edi Syafri ◽  
Sanjay Mavinkere Rangappa ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Polyvinyl Alcohol ◽  
Cellulose Fibers ◽  
Moisture Resistance ◽  
Solution Casting ◽  
Casting Method ◽  
Elongation At Break ◽  
Biocomposite Films ◽  
Solution Casting Method ◽  
Biocomposite Film

Polyvinyl Alcohol (PVA) based biocomposite film with cellulose was successfully fabricated by the solution casting method. The cellulose fibers were obtained by extraction of durian peel using alkalization and bleaching treatments. These treated cellulose fibers were used for the fabrication of PVA-based biocomposites. The durian peel cellulose fibers were varied by 2%, 4%, 6%, and 8% in the PVA matrix. Tensile test and moisture resistance of biocomposites were evaluated. The 6% addition of cellulose fibers in biocomposites increases the tensile strength up to 54% (37 MPa) than pure PVA film (24 MPa). Conversely, it reduces the elongation at break of the biocomposite film. Meanwhile, the moisture resistance properties of the biocomposites increased with the addition of cellulose fibers. The tensile strength and moisture resistance of biocomposites have been increased due to the homogeneous dispersion of the cellulose fibers and PVA matrix. These biocomposites able to reduce the environmental impacts by utilizing residual lignocellulosic biomass.

Experimental Study on Strength and AE Characteristics for PFRC with Different Fiber Content

2012 ◽  
Vol 446-449 ◽  
pp. 297-302
Author(s):  
Yao Wang ◽  
Yan Wang ◽  
Wei Hong Xuan ◽  
Gang Zheng ◽  
Yu Zhi Chen
Keyword(s):  
Experimental Study ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Fiber Diameter ◽  
Polypropylene Fiber ◽  
Fiber Content ◽  
Fiber Reinforced Concrete ◽  
Test Results ◽  
Action Mechanism ◽  
Polypropylene Fiber Reinforced Concrete

Tests for compressive strength and splitting tensile strength were performed on the concrete reinforced by Polypropylene Fiber of two diameters and of three fiber contents respectively and the whole loading process was monitored by acoustic emission (AE) technique. The test results showed that compressive strengths of Polypropylene Fiber Reinforced Concrete (PFRC) changed slightly with the increasing of fiber content but that splitting strengths changed more. The change rule of splitting strengths with fiber content was related to Fiber diameter which would determine a certain average fiber distance in concrete. There existed a bound value of average fiber distance, which was the most favorable to the splitting strength. Nine AE parameters of specimens received from their splitting tests always showed maximum or minimum at a fiber content of 0.6 kg/m3, which meant that these parameters would be helpful to the further research for the action mechanism of fiber in concrete.

scholarly journals PREPARATION OF POLYAMIDE11/BAMBOO FLOUR POLYMER COMPOSITE USING POLYVINYL ALCOHOL AS COMPATIBILIZER

2018 ◽  
Vol 56 (2A) ◽  
pp. 209-216
Author(s):  
Mai Duc Huynh
Keyword(s):  
Tensile Strength ◽  
Impact Strength ◽  
Polyvinyl Alcohol ◽  
Ethanol Solution ◽  
The Other ◽  
Step Method ◽  
Melt Mixing ◽  
Polyamide 11 ◽  
One Step ◽  
Bamboo Flour

In this work, the effects of bamboo flour (BF) and polyvinyl alcohol (PVA) contents on the tensile strength, impact strength, thermogravimetric analysis (TGA) and dynamic mechanical thermal analysis (DMTA) of polyamide 11/BF composites were studied in detail. The PVA was added into PA11/BF composites by two methods: (i) melt mixing with the other components in Haake mixer (one-step method); (ii) dispersing on the surface of BF in ethanol solution before mixing with PA11 in the melted state (two-step method). The investigation of mechanical properties showed the tensile strength of composites prepared by two-step method was higher than that of one-step method, while the trend for impact strength was opposite. On the other hand, DMTA analyses exhibited the enhacement of the compatibility of PA11/BF sample by observing the shift of peaks at the b relaxation around -80 oC due to the presence of PVA. This led to the increase of thermal stability of PA11/PVA/BF composites in comparison with PA11/BF composites. 

Sign in / Sign up

Export Citation Format

Share Document