Preparation and Evaluation of Biodegradation Performance of Potato Starch Mixed LDPE Polymer Composites

The potential of biodegradable polymers has long been appreciated. In this work, an attempt has been made to synthesize biodegradable polymer composite from potato starch and low density polyethylene (LDPE) with different ratios of starch (0%-15% w/w) by using an extruder. The structure and morphology of film surfaces was studied using X-ray diffraction and scanning electron microscopy (SEM) respectively. The physical (density, water absorption), mechanical (tensile, flexural) and thermal (TGA and DTA) analyses of starch/LDPE bio-composites were evaluated through standard methods and instruments. Biodegradation tendency was investigated utilizing soil burial and Rockwell micro-hardness test.The results revealed that the density and water absorption of polymer blends increased with increasing the starch content in starch/LDPE composites. The tensile strength and elongation at break decreased with starch content whereas the elastic modulus, flexural strength and flexural modulus rose. The biodegradability of composites enhanced by increasing the starch content and the result was backed by weight loss during burial of the samples in soil for 90 days. Microhardness test also supported the biodegradation probability as hardness found to reduce extensively after soil burial. However, further study to decide the optimum starch loading alongwith some modifications to starch and LDPE is highly suggested to have a biodegradable LDPE polymer composite in a realistic time frame.

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Effects of different starch types on the physico-mechanical and morphological properties of low density polyethylene composites

Journal of Polymer Engineering ◽

10.1515/polyeng-2013-0276 ◽

2015 ◽

Vol 35 (8) ◽

pp. 793-804 ◽

Cited By ~ 3

Author(s):

Md. Dalour Hossen Beg ◽

Shaharuddin Bin Kormin ◽

Mohd Bijarimi ◽

Haydar U. Zaman

Keyword(s):

Mechanical Properties ◽

Impact Strength ◽

Water Absorption ◽

Starch Content ◽

Flexural Modulus ◽

Morphological Properties ◽

Low Density Polyethylene ◽

Flow Index ◽

Low Density ◽

Sago Starch

Abstract The aim of this research is to investigate the effects of different thermoplastic starches and starch contents on the physico-mechanical and morphological properties of new polymeric-based composites from low density polyethylene (LDPE) and thermoplastic starches. Different compositions of thermoplastic starches (5–40 wt%) and LDPE were melt blended by extrusion and injection molding. The resultant materials were characterized with respect to the following parameters, i.e., melt flow index (MFI), mechanical properties (tensile, flexural, stiffness and impact strength) and water absorption. Scanning electron microscopy (SEM) was also used in this study for evaluating blend miscibility. MFI values of all blends decreased as the starch content increased, while the sago starch formulation showed a higher MFI value than others. The incorporation of fillers into LDPE matrix resulted in an increased in tensile modulus, flexural strength, flexural modulus and slightly decreased tensile strength and impact strength. However, sago starch filled composites exhibited better mechanical properties as compared to other starches. The SEM results revealed that the miscibility of such blends is dependent on the type of starch used. The water absorption increased with immersion time and the thermoplastic sago starch samples showed the lowest percentage of water absorption compared with other thermoplastic starches.

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Preliminary Study of Oil Palm Decanter Cake Natural Polymer Composite (OPDC-NPC)

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.911.40 ◽

2014 ◽

Vol 911 ◽

pp. 40-44 ◽

Cited By ~ 2

Author(s):

Muhammad Aqif Adam ◽

Alawi Sulaiman ◽

Che Mohd Som Said ◽

Ayub M. Som ◽

Azhari Samsu Bahruddin ◽

...

Keyword(s):

Tensile Strength ◽

Water Absorption ◽

Polymer Composite ◽

Palm Oil ◽

Oil Palm ◽

Absorption Rate ◽

Natural Fiber ◽

Natural Polymer ◽

Water Absorption Rate ◽

Decanter Cake

Palm oil industry produces huge amount of oil palm decanter cake (OPDC). Currently it is not yet commercialized however due to its characteristics, it can be used to produce oil palm decanter cake natural polymer composite (OPDC-NPC). NPC is a type of material made by combining natural fiber with polymer. Therefore the objective of this paper is to produce NPC from OPDC and then determine its mechanical and physical properties such as elasticity, stiffness, tensile strength and water absorption rate. The OPDC samples were collected from Felda Trolak Palm Oil Mill. Prior to NPC development, the oil was removed from OPDC using hexane soxhlet extraction method. OPDC-NPC was fabricated using molding method where the mixture of 95% polypropylene (PP) and 5% OPDC were mixed using twin-screw extruder. The results showed that OPDC-NPC has an elasticity of 2231 MPa, stiffness of 30 MPa, tensile strength of 32 MPa and water absorption rate of 0.16 % which was slightly better with the other types of fibers.

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Characteristics of gluten-free potato dough and bread with different potato starch-protein ratios

International Journal of Food Engineering ◽

10.1515/ijfe-2020-0287 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Jingyan Gao ◽

Nan Wang ◽

Lei Wang ◽

Shuang Song ◽

Miao Liu ◽

...

Keyword(s):

Relaxation Time ◽

Thermal Properties ◽

Potato Starch ◽

Starch Content ◽

Free Water ◽

Critical Issue ◽

Potato Flour ◽

Gluten Free ◽

Potato Protein ◽

The Poor

Abstract The poor retention of fermentation gases and air is a critical issue for gluten-free (GF) products. To better understand the effect of potato flour on the characteristics of GF bread, the mechanistic relations between potato starch and potato protein in different ratios at 9:1, 8:2, 7:3, 6:4 and 5:5 for GF dough were investigated for viscoelasticity, thermal properties, moisture, microstructures, and bread quality. The results reveal that potato starch had a relatively important role in both dough and bread. The viscous character of dough was highest at a proportion of 6:4, with a more compact microstructure and better bread color, volume, hardness, chewiness, resilience and springiness. With decreasing starch content, the gelatinization and retrogradation enthalpy decreased, and the relaxation time of immobilized water and free water increased significantly. These results are believed to be helpful for processors to develop and optimize GF breads with potato starch and potato protein.

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KARAKTERISTIK FISIK, KIMIA DAN ORGANOLEPTIK MIE KERING PADA BERBAGAI RASIO TEPUNG BONGGOL PISANG KEPOK

AGROINTEK ◽

10.21107/agrointek.v13i1.4918 ◽

2019 ◽

Vol 13 (1) ◽

pp. 82

Author(s):

Asnani Asnani ◽

Abdul Rahim ◽

Ifall Ifall

Keyword(s):

Water Absorption ◽

Water Content ◽

Wheat Flour ◽

Sensory Analysis ◽

Starch Content ◽

Weight Basis ◽

Chemical Characteristics ◽

Group Design ◽

Physical Chemical ◽

Physical And Chemical

<em>This work deals with the effect of banana (sweet plaintain or ‘kepok’ variety) hump flour substituted to wheat flour in the making of noodle, on physical, chemical, and sensory characteristics of noodle. A completely randomized was employed, with three replicates. Sensory analysis was conducted according to randomized group design. Four proportions of banana hump to wheat flour (10:90, 20:80, 30:70, and 40:60, weight basis) was studied. Results showed that the best physical and chemical characteristics was shown by noodle made from 10:90 proportion of banana hump to wheat flour, with 4.59% water absorption, 0.57% cooking loss, 10.37% water content, 34.21% starch content. However, result of sensory analysis suggested that the most liked noodle was that made from flour proportion of 20:80 with ‘like’ for colour, ‘like very much’ for aroma, ‘like’ for texture, ‘like’ for taste, and ‘like’ for overall preference</em>

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Ketahanan Papan Partikel Terhadap Suhu Tinggi, Serapan Air dan Perilaku Patah

Jurnal Nasional Teknologi Terapan (JNTT) ◽

10.22146/jntt.44941 ◽

2019 ◽

Vol 2 (3) ◽

pp. 230

Author(s):

Dian Sestining Ayu ◽

Edi Kurniadi

Keyword(s):

Physical Properties ◽

Water Absorption ◽

Particle Density ◽

Flexural Modulus ◽

Wood Powder ◽

Wood Floor ◽

Structural Purpose ◽

Density Values ◽

Shell Particles ◽

Coconut Shells

Wood is widely used for structural and non-structural purposes. In non-structural purpose, wood is used, among others, as furniture, parquet (wood floor), partitions and so on. In line with the decreasing availability of wood, the price of wood is becoming increasingly expensive. In certain uses, substitute materials such as particle boards have been started to use. Particle boards are generally composed of certain wood powder wastes. This study aimed to look for alternative materials for building particle boards from coconut shells. The particle boards to be tested were composed of coconut shells with the addition of certain wood powder which is added with certain percentage. Particle boards were printed with a certain size, given certain pressure and tested for their physical properties. The physical properties of the particle boards tested included particle density, water absorption, dry flexural modulus, and dry bending fracture modulus. The results showed that the best mixture composition capable of producing density values, water absorption, fracture modulus and optimum modulus of elasticity were found in the proportion of mixtures of 70-90% coconut shell particles and 30-10% wood particles.

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Mechanical and thermal characterization of a beet pulp-starch composite for building applications

E3S Web of Conferences ◽

10.1051/e3sconf/20198508005 ◽

2019 ◽

Vol 85 ◽

pp. 08005

Author(s):

Hamzé Karpaky ◽

Chadi Maalouf ◽

Christophe Bliard ◽

Alexandre Gacoin ◽

Mohammed Lachi ◽

...

Keyword(s):

Thermal Conductivity ◽

Sugar Beet ◽

Building Materials ◽

Potato Starch ◽

Starch Content ◽

Compressive Strain ◽

Thermal Inertia ◽

Thermal Characterization ◽

Sugar Beet Pulp ◽

Beet Pulp

This work shows the making of a new bio-based material for building insulation from sugar beet pulp and potato starch. The material is both lightweight and ecofriendly. The influence of starch/ sugar beet pulp ratio (S/BP) is studied. Four binder mass dosages are considered, 10, 20, 30 and 40% (relative to the beet pulp). Samples are characterized in terms of absolute and bulk density, compressive and flexural strength, as well as thermal properties (thermal conductivity and thermal inertia). The compressive strength increases linearly with the S/BP mass ratio to reach 0.52 MPa and the compressive strain is 30%. The thermal conductivity is to around 0.070 W/m. K. The results obtained shows that increasing starch amount tends to decrease composite porosity but increases thermal conductivity and mechanical properties. Depending on the starch content, beet pulp composites have a good thermal and can be used as building materials.

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Degradation studies during water absorption, aerobic biodegradation, and soil burial of biobased thermoplastic starch from agricultural waste/polypropylene blends

Journal of Applied Polymer Science ◽

10.1002/app.39123 ◽

2013 ◽

Vol 129 (6) ◽

pp. 3656-3664 ◽

Cited By ~ 25

Author(s):

Ming-Meng Pang ◽

Meng-Yan Pun ◽

Zainal Arifin Mohd. Ishak

Keyword(s):

Water Absorption ◽

Agricultural Waste ◽

Thermoplastic Starch ◽

Aerobic Biodegradation ◽

Soil Burial ◽

Degradation Studies ◽

Polypropylene Blends ◽

Waste Polypropylene

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Fabrication of raw and oxidized saw dust reinforced low density polyethylene (LDPE) composites and investigation of their physico-mechanical properties

Bangladesh Journal of Scientific and Industrial Research ◽

10.3329/bjsir.v47i4.14065 ◽

2013 ◽

Vol 47 (4) ◽

pp. 365-372 ◽

Cited By ~ 2

Author(s):

S Sultana ◽

HP Nur ◽

T Saha ◽

M Saha

Keyword(s):

Mechanical Properties ◽

Mangifera Indica ◽

Flexural Modulus ◽

Low Density Polyethylene ◽

Low Density ◽

Electron Micrograph ◽

Scanning Electron Micrograph ◽

Saw Dust ◽

Ldpe Composites ◽

Scanning Electron

In this research work, cellulosic waste mango (Mangifera indica) saw dust used as the reinforcing material with low density polyethylene (LDPE). A number of samples of saw dust reinforced low density polyethylene (LDPE) composites were prepared by compression moulding technique. In order to improve the mechanical properties of saw dust-LDPE composites, unbleached raw saw dust fibers were modified by oxidation using sodium hypochlorite. FT-IR spectroscopic and scanning electron micrograph (SEM) analyses were done and the results showed the evidence of positive oxidation reaction. The effects of oxidized saw dust on the performance of oxidized saw dust reinforced LDPE composites were studied comparing with the raw saw dust-LDPE composites. The effects of fiber content on the physico-mechanical properties of composites were also studied by preparing the composites with different percentage of fiber loading (from 7.5 wt% to 30 wt%) for each type of composite. Mechanical properties such as tensile strength, tensile modulus, elongation at break, flexural strength, flexural modulus of the resulting composite were measured. Better results were obtained from oxidized saw dust-LDPE composites. Scanning electron micrograph and water absorption tests were carried out for all composites and improved results were found for oxidized saw dust-LDPE composites. Bangladesh J. Sci. Ind. Res. 47(4), 365-372, 2012 DOI: http://dx.doi.org/10.3329/bjsir.v47i4.14065

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Thermoplastic Starch Films Added with Dry Nopal (Opuntia Ficus Indica) Fibers

Fibers ◽

10.3390/fib7110099 ◽

2019 ◽

Vol 7 (11) ◽

pp. 99 ◽

Cited By ~ 3

Author(s):

Fabrizio Scognamiglio ◽

Daniele Mirabile Gattia ◽

Graziella Roselli ◽

Franca Persia ◽

Ugo De Angelis ◽

...

Keyword(s):

Potato Starch ◽

Tensile Tests ◽

Thermoplastic Starch ◽

Morphological Characterization ◽

Scanning Calorimetry ◽

Opuntia Ficus Indica ◽

Positive Effects ◽

Manufacturing Procedure ◽

Starch Films ◽

Mechanical Tensile

Dry fibers coming from garden waste, originating from Opuntia ficus indica, were introduced in amounts of either 8 or 16 wt % into a self-produced thermoplastic starch (TPS) based on potato starch and glycerol. Thermal (differential scanning calorimetry, DSC), mechanical (tensile tests), and morphological characterization with scanning electron microscopy (SEM) and performing energy-dispersive X-ray spectrometry (microanalysis) were carried out. The results indicated that the uneven distribution and variable geometry of fibers introduced led to a reduction of tensile stress and strain with respect to pure TPS. However, the positive effects of prolonged mixing and increased thickness were highlighted, which suggest the fabrication of the composite could be improved in the future by controlling the manufacturing procedure.

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