Enhancing a multi-field-synergy process for polymer composite plasticization: A novel design concept for screw to facilitate phase-to-phase thermal and molecular mobility

Jian, Ranran; Yang, Weimin; Xie, Pengcheng; Liu, Haichao; Sain, Mohini

doi:10.1016/j.applthermaleng.2019.114448

Cited by 7 publications

(3 citation statements)

References 34 publications

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“…Based on the polymer multifield synergy theory, [23] a novel torsion element was designed and used as the core component of the torsion screw for uniformly dispersing renewable carbon and supercritical CO 2 into the polymer matrix to form single-phase homogeneous solution. The torsion element is shown in Figure 1a, there are several torsion channels divided evenly by torsion flights along the circumference, and two surfaces, named 90°twisted surface, are twisted by 90°along the axis in each torsion channel.…”

Section: Torsion Configurations and Its Functionary Mechanismmentioning

confidence: 99%

Acoustic Absorption Properties of Polystyrene‐Pyrolytic Pinus Resinosa Composite Foams Prepared by Torsion‐Induced Extrusion

Jian

Shahi

Semeniuk

et al. 2021

Macro Materials & Eng

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A lightweight acoustic composite foams with unique sound absorption feature is reported, that is, the foam acoustic composite demonstrates surprisingly stable sound absorption performance in a wide bandwidth of frequency. The unique acoustic properties are attributed to the highly exfoliated nanolayered biocarbon nucleation, derived from the pyrolytic pinus resinosa, with tailoring the foam structure and properties. Polystyrene (PS) composite foams with porous graphitic biocarbon are obtained by sequestering recycled supercritical carbon dioxide assisted with torsion extrusion technology. Unique design concept is validated and implemented in the torsion-induced extrusion process, with good mixing and thermal management, offering a suitable environment for the nucleation, uniform growth, and stability of the cells on the foam structures. The presence of porous graphitic nanolayered characteristics of biocarbon in the composition changes the sound insulation behavior from resonant absorber of pure PS closed cell foam to stable acoustic performance over a wide range in high frequency band (3.5-6.4 kHz), while preserving the closed cell structure. This allows the tailoring of cell structures and properties with varying renewable carbon content, so as to better adapt to a broadband sound absorption applications including absorbing panels, anechoic chamber with high accuracy and aircraft acoustic stealth technology.

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Section: Torsion Configurations and Its Functionary Mechanismmentioning

confidence: 99%

Acoustic Absorption Properties of Polystyrene‐Pyrolytic Pinus Resinosa Composite Foams Prepared by Torsion‐Induced Extrusion

Jian

Shahi

Semeniuk

et al. 2021

Macro Materials & Eng

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“…In this paper, a theoretical analysis of extrusion process was carried out, delving into the interrelationships among velocity field, velocity gradient field, and temperature gradient field [15], and the polymeric field synergy principle was proposed to elucidate the intrinsic mechanisms of heat and mass transport in the molten polymer during the extrusion process [16]. In order to validate the scientific validity of the proposed theory, four representative unconventional novel screws, widely used in industry, were selected to analyze and compared them with a standard screw.…”

Section: Introductionmentioning

confidence: 99%

Polymeric field synergy principle: Revealing the intrinsic mechanism of screw channel optimization to enhance thermal management and process efficiency

Pan,

Huang,

Zhu

et al. 2024

Clean Energy Sci. Technol.

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The process efficiency and energy efficiency of extrusion equipment emerge as pivotal challenges constraining the development of the polymer extrusion industry. This article presents a new principle of polymeric field synergy to guide the solution to the low mixing efficiency and energy utilization efficiency of traditional extrusion equipment. Finite element analysis was conducted on four novel unconventional screw configurations and compared with the traditional single-thread screw. Results revealed that more complicated melt flow patterns generated in the modified novel screw configurations enhanced the stretching deformation or helical flow. The stretching or helical flows to varying degrees during the melt extrusion process thereby improved the mixing and heat transport efficiency. Among them, helical flow induced by the Maddock element exhibited the most significant impact on stretching flow and ductile deformation in the flow field. Simultaneously, the helical flow caused radial motion of the internal material, significantly promoting the synergy between the velocity field, velocity gradient field, and temperature gradient field. This enhanced radial heat and mass transport efficiency within the screw channel, subsequently improving the overall operational efficiency of the equipment. The results of the finite element analysis have substantiated the scientific validity of the polymeric field synergy principle.

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“…In order to improve the cooling capacity in polystyrene foam extrusion, Rauwendaal [ 16 ] fabricated a high heat transfer (HHT) screw and achieved effective mass transfer from the center region to the outside region in the screw channel. In our previous work, Jian et al [ 17 , 18 ] developed a torsion extrusion technology based on multi-field synergy, inducing torsional spiral flow in the screw channel to improve phase-to-phase molecular and thermal mobility, achieving effective mass transfer from the top region to the bottom region in the screw channel. Then, Jian et al [ 19 , 20 ] studied the heat transfer and mixing capability of a torsion screw compared with three typical geometric forms commonly employed in practical application: conventional screw, Maddock screw and Pin screw.…”

Section: Introductionmentioning

confidence: 99%

Design and Ductile Behavior of Torsion Configurations in Material Extrusion to Enhance Plasticizing and Melting

et al. 2021

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In the present work, the ductile formation mechanism of a newly proposed torsion configuration has been investigated. One of the unique attributes of this paper is the first-time disclosure of the design and fabrication of a novel prototype screw with torsional flow character validating the orthogonal test model experimentally. The torsional spiral flow patterns that occurred in the torsion channel cause a ductile deformation of polymer in the form of a spiral, which in turn enhances the radial convection, achieving an effective mass transfer of material from the top region to the bottom region and vice versa. Furthermore, the characteristic parameters of torsion configuration have a significant influence on the plasticizing and melting capability of polymer. By range analysis and weight matrix analysis, the best factor and level combination was obtained. Results indicated that the aspect ratio of the torsion channel is almost equal to 1, and the plasticizing and melting capability of polymer is optimal. This novel design innovation offers a paradigm shift in the energy-efficient plasticization of polymer compounds.

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Enhancing a multi-field-synergy process for polymer composite plasticization: A novel design concept for screw to facilitate phase-to-phase thermal and molecular mobility

Cited by 7 publications

References 34 publications

Acoustic Absorption Properties of Polystyrene‐Pyrolytic Pinus Resinosa Composite Foams Prepared by Torsion‐Induced Extrusion

Acoustic Absorption Properties of Polystyrene‐Pyrolytic Pinus Resinosa Composite Foams Prepared by Torsion‐Induced Extrusion

Polymeric field synergy principle: Revealing the intrinsic mechanism of screw channel optimization to enhance thermal management and process efficiency

Design and Ductile Behavior of Torsion Configurations in Material Extrusion to Enhance Plasticizing and Melting

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