Processing of a LLDPE/HDPE pressure vessel liner by rotomolding

Neto, E.S. Barboza; Coelho, Luci Boa Nova; Forte, Maria Madalena de Camargo; Amico, Sandro Campos; Ferreira, Carlos Arthur

doi:10.1590/s1516-14392013005000168

Cited by 12 publications

(6 citation statements)

References 13 publications

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“…This is the residue that remains once clear PET waste for mechanical recycling has been removed ( Tournier et al, 2020 ). PcW-PET was pre-treated using extrusion and micronization processes that are employed widely in plastics industries ( Awaja and Pavel, 2005 ; Barboza Neto et al, 2014 ). The reaction temperature was set at 72°C to maximize kinetic turnover.…”

Section: Future Perspectivesmentioning

confidence: 99%

Microbial Polyethylene Terephthalate Hydrolases: Current and Future Perspectives

2020

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Plastic has rapidly transformed our world, with many aspects of human life now relying on a variety of plastic materials. Biological plastic degradation, which employs microorganisms and their degradative enzymes, has emerged as one way to address the unforeseen consequences of the waste streams that have resulted from mass plastic production. The focus of this review is microbial hydrolase enzymes which have been found to act on polyethylene terephthalate (PET) plastic. The best characterized examples are discussed together with the use of genomic and protein engineering technologies to obtain PET hydrolase enzymes for different applications. In addition, the obstacles which are currently limiting the development of efficient PET bioprocessing are presented. By continuing to study the possible mechanisms and the structural elements of key enzymes involved in microbial PET hydrolysis, and by assessing the ability of PET hydrolase enzymes to work under practical conditions, this research will help inform large-scale waste management operations. Finally, the contribution of microbial PET hydrolases in creating a potential circular PET economy will be explored. This review combines the current knowledge on enzymatic PET processing with proposed strategies for optimization and use, to help clarify the next steps in addressing pollution by PET and other plastics.

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Section: Future Perspectivesmentioning

confidence: 99%

Microbial Polyethylene Terephthalate Hydrolases: Current and Future Perspectives

2020

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“…Rotomolding is a cost-effective method for pr ducing hollow polymer parts. The process involves placing the polymer in a mold in t shape of the final liner, then rotating and heating the mold, followed by a cooling proce [157,159]. Hydrogen has small molecules, making diffusion and penetration important aspects of safety in hydrogen pressure tanks.…”

Section: Manufacturing Processmentioning

confidence: 99%

“…Liner materials must consider both safety and cost-effectiveness [147,[151][152][153][154]. Type IV polymer liners can be manufactured using injection molding and welding [150,155], blow molding [156], and rotomolding [157,158] techniques, as shown in Figure 8b-d. Injection molding and welding is a multi-stage molding process [49].…”

Section: Manufacturing Processmentioning

confidence: 99%

A Review on the Cost Analysis of Hydrogen Gas Storage Tanks for Fuel Cell Vehicles

Shin

2023

Energies

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The most practical way of storing hydrogen gas for fuel cell vehicles is to use a composite overwrapped pressure vessel. Depending on the driving distance range and power requirement of the vehicles, there can be various operational pressure and volume capacity of the tanks, ranging from passenger vehicles to heavy-duty trucks. The current commercial hydrogen storage method for vehicles involves storing compressed hydrogen gas in high-pressure tanks at pressures of 700 bar for passenger vehicles and 350 bar to 700 bar for heavy-duty trucks. In particular, hydrogen is stored in rapidly refillable onboard tanks, meeting the driving range needs of heavy-duty applications, such as regional and line-haul trucking. One of the most important factors for fuel cell vehicles to be successful is their cost-effectiveness. So, in this review, the cost analysis including the process analysis, raw materials, and manufacturing processes is reviewed. It aims to contribute to the optimization of both the cost and performance of compressed hydrogen storage tanks for various applications.

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“…Estudiar los cambios en la temperatura de transición vítrea (Tg) de mezclas poliméricas binarias permitirá determinar la posible miscibilidad, inmiscibilidad o compatibilidad de estas. La miscibilidad completa está caracterizada por una sola Tg para todas las mezclas, para el caso de sistemas compatibles se tienen dos Tg los cuales dependerán de la composición de la mezcla y finalmente si la mezcla presenta inmiscibilidad la temperatura de transición vítrea de los componentes puros no se verá afectada por la composición [15,21,22] En la Figura 1. Termograma de DSC para los copolímeros de olefina cíclica.…”

Section: Tensión Superficialunclassified

Estudio de las propiedades mecánicas, térmicas y morfología de la mezcla de copolímero de olefina cíclica (COC) y polietileno lineal de baja densidad (LLDPE)

Espinoza-Ibarra,

Da Silva,

Sánchez-Valdés

2023

Braz. J. Develop.

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En el presente trabajo se estudiaron mezclas a base de copolímeros de olefinas cíclicas (COC) y polietileno lineal de baja densidad (LLDPE) con el objetivo de determinar las concentraciones de los componentes más adecuada para favorecer propiedades mecánicas como la resistencia al impacto y el módulo elástico. La mezcla LLDPE/COC se preparó en un barrido de concentraciones del 20, 25, 30 y 35% en volumen de COC con respecto al LLDPE en un mezclador por lotes y en un extrusor doble husillo. Se utilizaron dos tipos de COC, con norborneno o con tetraciclodoceno como segmento rígido y LLDPE. Una vez obtenidas las mezclas se caracterizaron sus propiedades mecánicas, térmicas, morfológicas y su compatibilidad. De acuerdo con los resultados obtenidos se puede concluir que las propiedades mecánicas se ven favorecidas al utilizar la concentración de 20-25% volumen del COC con norborneno en su estructura química y procesadas en continuo.

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Processing of a LLDPE/HDPE pressure vessel liner by rotomolding

Cited by 12 publications

References 13 publications

Microbial Polyethylene Terephthalate Hydrolases: Current and Future Perspectives

Microbial Polyethylene Terephthalate Hydrolases: Current and Future Perspectives

A Review on the Cost Analysis of Hydrogen Gas Storage Tanks for Fuel Cell Vehicles

Estudio de las propiedades mecánicas, térmicas y morfología de la mezcla de copolímero de olefina cíclica (COC) y polietileno lineal de baja densidad (LLDPE)

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