scholarly journals Tensile, Thermal and Moisture Absorption Properties of Polyvinyl Alcohol (PVA) / Bengkuang (Pachyrhizus erosus) Starch Blend Films

2019 ◽  
Vol 16 (1) ◽  
pp. 70-75 ◽  
Author(s):  
MOCHAMAD ASROFI ◽  
DEDI DWILAKSANA ◽  
HAIRUL ABRAL ◽  
RAHMAT FAJRUL
Keyword(s):  
Tensile Strength ◽  
Polyvinyl Alcohol ◽  
Food Packaging ◽  
Moisture Absorption ◽  
Starch Content ◽  
Tensile Elongation ◽  
Absorption Characteristic ◽  
Blend Films ◽  
Pachyrhizus Erosus ◽  
Solution Casting Method

This paper described the tensile, thermal, and moisture absorption characteristic of polyvinyl alcohol (PVA) / bengkuang (Pachyrhizuserosus) starch blend films. The film was produced through the solution casting method. Tensile, thermogravimetric analysis and moisture test were studied to determine the tensile strength, thermal stability, and moisture absorption, respectively. The highest tensile strength (TS) was 15.86 ± 0.69 MPa for pure PVA film. This result was higher than bengkuang starch and its blends film. Tensile elongation (TE) decreased as increased bengkuang starch content in PVA. The thermal degradation of PVA film was higher 10°C than bengkuang starch films in range temperature 200-380°C. The addition of bengkuang starch in PVA also increased moisture absorption. The highest moisture absorption was in the bengkuang starch film. This blend film’s tensile, thermal, and moisture properties probably suggested it could be suitable for food packaging.

Preparation and Characterization of Polyvinyl Alcohol/Starch Blend Film Composite

2014 ◽  
Vol 554 ◽  
pp. 86-90 ◽  
Author(s):  
Nurul Saadiah Lani ◽  
Norzita Ngadi
Keyword(s):  
Polyvinyl Alcohol ◽  
Starch Content ◽  
Weight Ratio ◽  
Degradation Process ◽  
Absorption Capacity ◽  
Elongation At Break ◽  
Blend Film ◽  
Blend Films ◽  
Solution Casting Method

Nowadays, the demands of plastics materials are increasing rapidly. Nevertheless, most of these products are non-environmentally friendly and non–biodegradable. Polyvinyl alcohol (PVA) is one of the polymers that have been investigated widely for the potential for use as biodegradable plastics. However, the applications of PVA materials are limited due to their high cost and slow degradation process especially under anaerobic condition. Therefore, this study was conducted to investigate the effect of varying the PVA and starch content on the composite properties. A series of blend films with different ratio of PVA and starch were prepared by solution casting method. The results of this study have revealed that the polyvinyl alcohol and starch at a weight ratio of 70:30 was selected as the best blending composition, whereby the 70:30 blend film have the best elongation at break at about 334.69%, with a tolerable tensile strength value and water absorption capacity of 3.830 MPa and 49.59%, respectively.

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.

Dynamic and creep analysis of polyvinyl alcohol based films blended with starch and protein

2018 ◽  
Vol 39 (1) ◽  
pp. 35-47 ◽  
Author(s):  
Naman Jain ◽  
Vinay K. Singh ◽  
Sakshi Chauhan
Keyword(s):  
Polyvinyl Alcohol ◽  
Moisture Absorption ◽  
Viscoelastic Behavior ◽  
Mechanical Analysis ◽  
Cross Linking ◽  
Mechanical And Thermal Properties ◽  
Blend Films ◽  
Creep And Recovery ◽  
Degradation Temperature ◽  
Creep Analysis

Abstract The present study focuses on the fabrication and analyses of polyvinyl alcohol (PVA) based films blended with polymers, such as starch and protein. The aim is to improve the moisture absorption, solubility, mechanical and thermal properties of PVA by blending it with various polymers. The thermal cross-linking of the films has been studied by heating the films at 120°C for 4 h. The result shows that PVA was completely soluble in water, while post-blending solubility and moisture absorption of blended films decreased. The tensile strength of blended films was significantly higher (4%–29%) as compared to neat PVA, while thermally cross-linked films showed much higher strength (8%–174%). Blended films were characterized using Fourier transform infrared spectroscopy (FTIR) to confirm the formation of hydrogen bonds. Thermogravimetric analysis showed the increase in degradation temperature post-blending as compared to neat PVA. The viscoelastic behavior of the material as well as glass transition temperature was studied using dynamic mechanical analysis. Creep and recovery behavior were examined to study the effect of stress and temperature on creep strain. The biodegradability of the blended films was increased post-blending. This study showed that PVA based blend films can replace non-biodegradable plastics and hence are necessary for the development of environmentally friendly materials.

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.

Effect of Gelatinization on Morphology and Thermal Properties of Polyvinyl Alcohol-Corn Starch Blend Films

2012 ◽  
Vol 724 ◽  
pp. 89-92
Author(s):  
Ji Wei Li ◽  
Xue Gang Luo ◽  
Xiao Yan Lin ◽  
Xian Hong Li
Keyword(s):  
Weight Loss ◽  
Thermal Properties ◽  
Polyvinyl Alcohol ◽  
Corn Starch ◽  
Casting Method ◽  
Scanning Calorimetry ◽  
Blend Films ◽  
Hydrogen Bonding Interactions ◽  
Gelatinized Starch ◽  
Solution Casting Method

The blend films of ungelatinized and gelatinized starch/polyvinyl alcohol (PVA) were prepared by solution casting method. Their morphologies and thermal properties were analyzed by scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). A droplet phase was observed in the blends containing ungelatinized starch and a laminated phase was observed in the blends containing gelatinized starch. For both ungelatinized and gelatinized starch/PVA blends the melting temperature (Tm) (210230) of PVA was detected, and the Tm of gelatinized starch/PVA blends was higher than that of the ungelatinized starch/PVA blends. TGA results showed that over the rst 300 the weight loss for ungelatinized starch/PVA blends was higher than that for gelatinized starch/PVA blends, however the gelatinized starch/PVA blends showed the greater weight loss after scanning up to 400. Different morphologies and thermal properties of two types of blends were attributed to the different hydrogen bonding interactions between starch and polyvinyl alcohol.

scholarly journals Properties of Biocomposite Film Based on Whey Protein Isolate Filled with Nanocrystalline Cellulose from Pineapple Crown Leaf

Polymers ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 4278
Author(s):  
Fitriani Fitriani ◽  
Sri Aprilia ◽  
Nasrul Arahman ◽  
Muhammad Roil Bilad ◽  
Hazwani Suhaimi ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Whey Protein ◽  
Food Packaging ◽  
Water Solubility ◽  
Moisture Absorption ◽  
Principal Component ◽  
Whey Protein Isolate ◽  
Protein Isolate ◽  
Nanocrystalline Cellulose ◽  
Casting Technique

Among the main bio-based polymer for food packaging materials, whey protein isolate (WPI) is one of the biopolymers that have excellent film-forming properties and are environmentally friendly. This study was performed to analyse the effect of various concentrations of bio-based nanocrystalline cellulose (NCC) extracted from pineapple crown leaf (PCL) on the properties of whey protein isolate (WPI) films using the solution casting technique. Six WPI films were fabricated with different loadings of NCC from 0 to 10 % w/v. The resulting films were characterised based on their mechanical, physical, chemical, and thermal properties. The results show that NCC loadings increased the thickness of the resulting films. The transparency of the films decreased at higher NCC loadings. The moisture content and moisture absorption of the films decreased with the presence of the NCC, being lower at higher NCC loadings. The water solubility of the films decreased from 92.2% for the pure WPI to 65.5% for the one containing 10 % w/v of NCC. The tensile strength of the films peaked at 7% NCC loading with the value of 5.1 MPa. Conversely, the trend of the elongation at break data was the opposite of the tensile strength. Moreover, the addition of NCC produced a slight effect of NCC in FTIR spectra of the WPI films using principal component analysis. NCC loading enhanced the thermal stability of the WPI films, as shown by an increase in the glass transition temperature at higher NCC loadings. Moreover, the morphology of the films turned rougher and more heterogeneous with small particle aggregates in the presence of the NCC. Overall, the addition of NCC enhanced the water barrier and mechanical properties of the WPI films by incorporating the PCL-based NCC as the filler.

Eco-friendly synthesis of biodegradable and high strength ternary blend films of PVA/starch/pectin: Mechanical, thermal and biodegradation studies

2020 ◽  
pp. 096739112097288
Author(s):  
Sohan Lal ◽  
Vinod Kumar ◽  
Sanjiv Arora
Keyword(s):  
Thermal Stability ◽  
Tensile Strength ◽  
Tensile Properties ◽  
Food Packaging ◽  
Corn Starch ◽  
Plastic Material ◽  
Ternary Blend ◽  
Cross Linking ◽  
Elongation At Break ◽  
Blend Films

The present study described reduces of plastic based non-biodegradable food packaging material and sustainability toward the environmental protection. The polyvinyl alcohol (PVA) based ternary blend biodegradable films with bio-materials (corn starch and pectin) in ratio 1:5, 1:2, 1:1 and 2:1 were synthesized by solution casting method in water as a solvent to improve the tensile strength, high % elongation at break, and sustained packaging properties. Citric acid and glycerol were used for cross-linking and plasticizing purposes which are also bio-degradable and non-toxic. Blend films were characterized by FTIR and checked out the cross-linking of different components. The dispersion of contents in films was analyzed by SEM images. Thermal stability and degradation behavior of casted films were studied with thermogravimetry and thermal stability increased in blends as compared to neat PVA film. Biodegradability of cast films was also checked by Soil Burial method and bio-degradation increased with time i.e. almost 50% degrades in 30 days and 68% after 90 days. Tensile properties of blend films were tested and found that tensile strength (18.85 MPa) and elongation at break (516%) are high in blend films as compared with neat PVA film (12.04 MPa, 170%). The films are eco-friendly and biodegradable, might be a replacement of plastic material in food packaging having improved tensile properties.

scholarly journals Penambahan Gliserol terhadap Karakteristik Bioplastik dari Komposit Pati Aren dan Glukomanan

METANA ◽  
2020 ◽  
Vol 16 (1) ◽  
pp. 19-25
Author(s):  
Sari Purnavita ◽  
Dyionisius Yoga Subandriyo ◽  
Ayu Anggraeni
Keyword(s):  
Tensile Strength ◽  
Polyvinyl Alcohol ◽  
Water Resistance ◽  
Tensile Elongation ◽  
High Tensile Strength ◽  
Starch Solution ◽  
Resistance Value

Penelitian ini bertujuan untuk mengetahui pengaruh rasio glukomanan dan pati aren dengan penambahan gliserol terhadap karakteristik bioplastik yang dihasilkan. Pembuatan bioplastik dilakukan dengan mencampurkan larutan glukomanan dan larutan pati aren, selanjutnya dilakukan penambahan gliserol dan poli vinil alkohol. Campuran tersebut dipanaskan pada suhu 80°C selama 20 menit, hasil pencampuran kemudian dimasukkan cetakan dan dikeringkan dengan oven hingga menjadi lembaran, Selanjutnya bioplastik tersebut diuji karakteristiknya yang meliputi ketahanan air, tensile strength dan tensile elongation. Rasio glukomanan terhadap pati aren yaitu 1:0,5 ; 1:1 ; 1:1,5 ; dan 1:2 Serta jumlah penambahan gliserol yaitu : 0 ml dan 10 ml. Hasil penelitian menunjukkan bahwa berbagai rasio glukomanan dan pati aren dengan penambahan gliserol berpengaruh terhadap karakteristik bioplastik. Pada penambahan gliserol 0 ml (tanpa gliserol), komposit bioplastik dengan perbandingan glukomanan : pati aren sebesar 1:1 menghasilkan nilai ketahanan terhadap air yang tertinggi , nilai tensile strength yang cukup tinggi, dan morfologi yang baik, tetapi nilai tensile elongation rendah. Sedangkan pada percobaan dengan penambahan gliserol 10 ml, komposit bioplastik dengan perbandingan glukomanan : pati aren sebesar 1:1 menghasilkan nilai tensile elongatiom yang tertinggi, morfologi bagus tetapi nilai tensile strength dan ketahanan airnya rendah. Aim of this research to determine the effect of glucomannan ratio and sugar palm starch with the addition of glycerol to the bioplastic characteristics. Making of bioplastics by mixing glucomannan solution and sugar palm starch solution, then addition of glycerol and polyvinyl alcohol. The mixture is heated at 80° C for 20 minutes, the result of mixing afer that put into a mold and dried in the oven until it becomes a sheet. After that, the characteristics of the bioplastics were tested which included water resistance, tensile strength and tensile elongation. The ratio of glucomannan to sugar palm starch is 1:0.5; 1:1; 1:1,5; and 1:2 And the amount of glycerol addition are: 0 ml and 10 ml. The results showed that the ratio of sugar palm starch and glucomannan with the addition of glycerol affected the bioplastic characteristics. At the addition of glycerol 0 ml, bioplastic composites with glucomane: palm starch ratio of 1:1 produce the highest water resistance value, high tensile strength value, and good morfology but low tensile elongation value. Whereas in experiments with the addition of 10 ml of glycerol, bioplastic composites with a glucomane: palm starch ratio of 1:1 produced the highest tensile elongatiom value and good morfology result but the value of tensile strength and water resistance was low

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.

scholarly journals Preparation and optimization of Starch/Poly vinyl alcohol/ ZnO nanocomposite films applicable for food packaging

2021 ◽  
Author(s):  
Saeed Yari ◽  
Jamshid Mohammadi-Rovshandeh ◽  
Mohsen Shahrousvand
Keyword(s):  
Tensile Strength ◽  
Polyvinyl Alcohol ◽  
Food Packaging ◽  
Film Formation ◽  
Water Vapor Permeability ◽  
Good Choice ◽  
Nanocomposite Films ◽  
Poly Vinyl Alcohol ◽  
Vapor Permeability ◽  
Factors Affecting

Abstract Pollution and destruction of the environment due to the accumulation of non-degradable plastics are some of the most important concerns in the world. A significant amount of this waste is related to the polymers used in food packaging. Therefore, in recent years, experts in the food industry have been looking for suitable biodegradable alternatives to synthetic polymers. Preparing biocompatible and biodegradable films based on starch is a good choice. In this study, various factors affecting films of starch/polyvinyl alcohol (PVA)/ containing ZnO nanoparticles such as the amount of starch, PVA, glycerol, and ZnO were evaluated by response surface methodology (RSM). Film formation, mechanical properties, swelling, solubility, and water vapor permeability (WVP) were selected as responses of RSM. The results showed that hydrogen bonding interactions between polyvinyl alcohol and starch improved the film formation. The effect of glycerol and PVA content on the mechanical strength was contrary to each other. As the amount of PVA increased, the tensile strength first decreased and then increased. The value of WVP was for all Runs from 0 to 6.77 × 10− 8 gm− 1s− 1Pa− 1. Finally, films with high film formation, maximum tensile strength, and high elongation at break, minimum solubility, permeability, and swelling were optimized.

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