Melt behavior of polypropylene‐co‐ethylene composites filled with dual component of sago and kenaf natural filler

2021 ◽  
pp. 51621
Author(s):  
Nor Azura Abdul Rahim ◽  
Loo Yu Xian ◽  
Yamuna Munusamy ◽  
Zunaida Zakaria ◽  
Suganti Ramarad
Keyword(s):  
Natural Filler

scholarly journals A review on allotropes of carbon and natural filler-reinforced thermomechanical properties of upgraded epoxy hybrid composite

2021 ◽  
Vol 60 (1) ◽  
pp. 237-275
Author(s):  
Krushna Gouda ◽  
Sumit Bhowmik ◽  
Biplab Das
Keyword(s):  
Hybrid Composite ◽  
Low Cost ◽  
Extraction Process ◽  
Thermomechanical Properties ◽  
Neat Epoxy ◽  
Inorganic Filler ◽  
Nonrenewable Resource ◽  
High Performing ◽  
Thermosetting Polymers ◽  
Natural Filler

Abstract The scarcity of nonrenewable resource motivated inclination towards the environmental-friendly novel materials and development of waste natural filler-based hybrid composite is encouraged to fulfill the material demand. Epoxy resins-based composites are high-performing thermosetting polymers and have outstanding blending properties, good machinability, and low cost. Due to these advantages, thermoset plastic is largely used in a broad range of engineering applications; however, thermomechanical properties of neat epoxy are low. Thus, to enhance the thermomechanical properties of epoxy, it is interfaced materials such as graphite, graphene nanoplatelet, boron, carbon fiber, aluminium, silver, etc. Among various substances, graphene has been deliberated as an acceptable novel filler because of its exceptional properties. In addition to inorganic filler inclusion, natural filler/fiber like hemp, sisal, flax, bamboo, jute, etc. can be utilized in a higher percentage as biodegradable material. The present article assisted to improve thermomechanical properties of neat epoxy. This work identifies and addresses (i) processes used for graphene modification; (ii) treatment utilized for enhancing the binding properties of natural filler; (iii) various natural filler extraction process employed; (iv) neat epoxy modification; and (v) influence of different dimensions of fillers.

Development of technology and research of quality indicators of yoghurt with natural filler in the preservation process

2021 ◽  
Vol 9 (16) ◽  
pp. 69-78
Author(s):  
Anna Helikh ◽  
◽  
Svitlana Danylenko ◽  
Tetiana Kryzhska ◽  
Li Qingshan ◽  
...  
Keyword(s):  
Control Sample ◽  
Storage Period ◽  
Storage Process ◽  
Toxicological Studies ◽  
Texture Characteristics ◽  
Practical Research ◽  
Microbiological Parameters ◽  
Natural Filler ◽  
Pumpkin Powder ◽  
Modern Technologies

The subject of research – yogurt and pumpkin powder. The purpose of the study – to develop the technology of making yogurt with filler – pumpkin powder. Methods. Standard and practical research methods of dairy products were used. The qualitative indicators of the developed yogurt (sensorial indicators, viscosity, microbiological and toxicological indicators) during storage (15 days) were studied. The results of the study. Modern technologies of yogurt production include the use of various additives to improve the technological properties, as well as quality and texture characteristics. In this work, new technological solutions were developed in the formulations of yogurts without stabilizer with dietary fiber contained in pumpkin meal powder, the acceptability of new types of yogurts was evaluated. The dependence of a rheological indicator - the viscosity of the product depending on the amount of filler - in the storage process is analyzed. It was found that the largest increase in effective viscosity was observed in the sample with the introduction of pumpkin meal powder in the amount of 10 %, and the smallest – in the sample with the introduction of pumpkin meal powder in the amount of 5 %. This is due to the quantitative introduction of pumpkin meal powder into the formulation, which is a good sorbent that promotes a more even distribution of moisture between the particles of crushed plant material, which contributes to the formation of a denser clot. The influence of the filler – pumpkin meal powder on the microbiological parameters of yogurt during storage was determined. Studies of microbiological parameters of the control sample of yogurt classic and experimental samples with pumpkin meal powder during storage (15 days) indicate that the opportunistic and pathogenic microflora are within acceptable values. Toxicological studies have shown that safety indicators developed samples of yogurt with filler – pumpkin meal powder – meet the toxicological requirements for the type of product. Based on research, it is proven that yogurt with a natural filler – pumpkin meal powder retains high quality throughout the storage period. Scope of research results. The results of the research will be used to improve the technology of yogurt production at dairy plants.

scholarly journals Polyethylene-coffee husk eco-composites for production of value-added consumer products

2021 ◽  
Vol 31 (1) ◽  
Author(s):  
Leyla Y. Jaramillo ◽  
Mauricio Vásquez-Rendón ◽  
Sergio Upegui ◽  
Juan C. Posada ◽  
Manuel Romero-Sáez
Keyword(s):  
High Density Polyethylene ◽  
Value Added ◽  
Young Modulus ◽  
Consumer Products ◽  
Elongation At Break ◽  
Coffee Husk ◽  
Worldwide Production ◽  
Natural Filler ◽  
Industrial Level ◽  
Microscopy Images

AbstractThe annual worldwide production of coffee exceeds 10 million tons, and more than 90% of this production is waste, including the husk. On the other hand, plastic consumption increases every year, and sustainable alternatives are necessary to decrease it. This work arises to solve these two problems, and seeks to produce products at an industrial level from polyethylene/coffee husk eco-composites. Both Low Density Polyethylene and High Density Polyethylene were used, and the amounts of coffee husk added as filler were 20 and 40 wt%. The composites were characterized by different morphological, thermal and mechanical techniques. Scanning Electron Microscopy images showed husk particles embedded in the polymer matrix, but with some gaps between the polymer and the filler, because no compatibilizer agent was used. The addition of large amounts of natural filler negatively affected the tensile strength and elongation at break, but increases eco-composites crystallinity, and hence, their Young modulus and hardness. The industrial applicability of the eco-composites was verified through the production of five different consumer products by extrusion and injection processes, using mixtures with 40 wt% coffee husks. All products were obtained without significant defects. If only 3.25 wt% of the polyethylene products produced each year in Colombia did so with the eco-composites developed in this work, all the coffee husk produced in the country would be used, and the emission of about 5.390 million m3 of greenhouse gases would be avoided.

The Effects of Stearic Acid (SA) on the Thermal and Physical Properties of LLDPE/DS Composites

2021 ◽  
Vol 1021 ◽  
pp. 299-307
Author(s):  
Abduati Elnaid ◽  
Rosniza Hamzah
Keyword(s):  
Stearic Acid ◽  
Degree Of Crystallinity ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Oh Groups ◽  
Gel Content ◽  
Hemicellulose Removal ◽  
Natural Filler ◽  
A Minor ◽  
Different Content

In this study, polymer composites were synthesized from date seeds (DS) powder as natural filler and low-density polyethylene (LLDPE) as polymer matrix. This composite was exposed into chemical modification using different content of Stearic Acid (SA) (3, 6 and 9 wt.%). The composite was fabricated by using the process of extrusion and injection molding respectively. The prepared samples were examined using TGA, DSC, FTIR, and Gel Content test. It can be clearly observed that all the treated samples have presented three-steps of decomposition as shown in TGA curves. It is also observed that the Tm, Tc, and degree of crystallinity of the modified LLDPE/DS biocomposites increased as SA increase. Thr FTIR spectra have shown different type of stretching bands, the band at 3346 - 3347 cm-1 appeared because of hydroxyle (OH) groups that is described as a hydrophilicity measure. Beside, there was a minor decrease on the peak between 3346 and 3347 cm-1 of modified composite, whichwas attributed to the hemicellulose removal from the modified composite. The gel content of the treated mples increased due to the increase of crosslinking between DS and LLDPE in existence of SA.

Characterization of a Novel Natural Filler from Sirisha Bark

2020 ◽  
pp. 1-10
Author(s):  
Tanmayee Khuntia ◽  
Sandhyarani Biswas
Keyword(s):  
Natural Filler

scholarly journals Release of thymol from poly(lactic acid)-based antimicrobial films containing kenaf fibres as natural filler

LWT ◽  
2016 ◽  
Vol 66 ◽  
pp. 629-637 ◽  
Author(s):  
Intan S.M.A. Tawakkal ◽  
Marlene J. Cran ◽  
Stephen W. Bigger
Keyword(s):  
Lactic Acid ◽  
Poly Lactic Acid ◽  
Natural Filler ◽  
Antimicrobial Films ◽  
Kenaf Fibres

Investigation of ultrasonic vibration on thrust force, surface integrity, and geometrical tolerances during drilling of natural filler reinforced composites

2020 ◽  
Vol 234 (20) ◽  
pp. 4041-4055
Author(s):  
Farzad Pashmforoush ◽  
Reza Farshbaf Zinati ◽  
Davoud Maleki
Keyword(s):  
Surface Roughness ◽  
Ultrasonic Vibration ◽  
Thrust Force ◽  
Walnut Shell ◽  
Injection Molding Process ◽  
Reinforced Composites ◽  
Performance Parameters ◽  
Molding Process ◽  
Impact Action ◽  
Natural Filler

Growing global environmental threats have attracted researchers and engineers toward design and manufacture of green materials. In this regard, natural filler reinforced composites are environmentally friendly, cost-effective materials with a lot of advantages over conventional carbon/glass fiber reinforced composites. Hence, in this study, the drilling performance of walnut shell powder reinforced composite material was experimentally investigated. For this purpose, the composite specimens were first fabricated by injection molding process, followed by further drilling tests, which were performed with and without ultrasonic vibration. The effect of drilling parameters and ultrasonic vibration was investigated on surface roughness, thrust force and geometrical tolerances (circularity and cylindricity), as the process performance parameters. The obtained results demonstrated that by increase of the spindle rotational speed and decrease of feed rate, the thrust force, surface roughness and geometrical tolerances were reduced. Also, it was seen that ultrasonic vibration could effectively enhance the performance parameters, which was attributed to the intermittent cutting process and impact action of ultrasonic vibration, leading to reduced friction, improved material removal, reduced cutting forces, and better surface quality.

scholarly journals Material Extrusion Additive Manufacturing of Wood and Lignocellulosic Filled Composites

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2115
Author(s):  
Meghan E. Lamm ◽  
Lu Wang ◽  
Vidya Kishore ◽  
Halil Tekinalp ◽  
Vlastimil Kunc ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Present State ◽  
Material Properties ◽  
Large Scale ◽  
State Of The Art ◽  
Material Extrusion ◽  
Functional Additives ◽  
Natural Filler ◽  
Natural Fillers

Wood and lignocellulosic-based material components are explored in this review as functional additives and reinforcements in composites for extrusion-based additive manufacturing (AM) or 3D printing. The motivation for using these sustainable alternatives in 3D printing includes enhancing material properties of the resulting printed parts, while providing a green alternative to carbon or glass filled polymer matrices, all at reduced material costs. Previous review articles on this topic have focused only on introducing the use of natural fillers with material extrusion AM and discussion of their subsequent material properties. This review not only discusses the present state of materials extrusion AM using natural filler-based composites but will also fill in the knowledge gap regarding state-of-the-art applications of these materials. Emphasis will also be placed on addressing the challenges associated with 3D printing using these materials, including use with large-scale manufacturing, while providing insight to overcome these issues in the future.

scholarly journals Effect of Modified Natural Filler O-Methylene Phosphonic κ-Carrageenan on Chitosan-Based Polymer Electrolytes

Energies ◽  
2018 ◽  
Vol 11 (7) ◽  
pp. 1910 ◽  
Author(s):  
Joy Liew ◽  
Kee Loh ◽  
Azizan Ahmad ◽  
Kean Lim ◽  
Wan Wan Daud
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Tensile Strength ◽  
Infrared Spectroscopy ◽  
Ionic Conductivity ◽  
Polymer Electrolyte ◽  
Polymer Electrolytes ◽  
Solid Polymer Electrolyte ◽  
Solid Polymer ◽  
Solution Casting ◽  
Natural Filler

The potential for using O-methylene phosphonic κ-carrageenan (OMPk) as a filler in the chitosan-based polymer electrolyte N-methylene phosphonic chitosan (NMPC) was investigated. OMPk, a derivative of κ-carrageenan, was synthesized via phosphorylation and characterized using infrared spectroscopy (IR) and nuclear magnetic resonance (NMR). Both the IR and NMR results confirmed the phosphorylation of the parent carrageenan. The solid polymer electrolyte (SPE)-based NMPC was prepared by solution casting with different weight percentages of OMPk ranging from 2 to 8 wt %. The tensile strength of the polymer membrane increased from 18.02 to 38.95 MPa as the amount of OMPk increased to 6 wt %. However, the increase in the ionic conductivity did not match the increase in the tensile strength. The highest ionic conductivity was achieved with 4 wt % OMPk, which resulted in 1.43 × 10−5 Scm−1. The κ-carrageenan-based OMPk filler strengthened the SPE while maintaining an acceptable level of ionic conductivity.

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