Organizational issues for disseminating recycling technologies of carbon fiber-reinforced plastics in the Japanese industrial landscape

Ueda, Hiroyuki; Moriyama, Akihiro; Iwahashi, Hitoshi; Moritomi, Hiroshi

doi:10.1007/s10163-020-01138-8

Cited by 10 publications

(5 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The worldwide annual demand for carbon fiber composites can be expected to approach 199 kilotons by 2022, up from the 2018 usage of 128 kilotons [39]. By 2030, Japan's CFRP recycling market is expected to be worth roughly 100 billion yen [40].…”

Section: Introductionmentioning

confidence: 99%

Hybrid Novel Additive Manufacturing for Sustainable Usage of Waste

Balaji

Bhuvaneswari

Arulmurugan

et al. 2022

Journal of Nanomaterials

View full text Add to dashboard Cite

Additive manufacturing (AM) encompasses many forms of technologies and materials as 3D printing is being used in almost all industries. The variety of materials used includes but is not limited to plastics, ceramics, resins, metals, sand, textiles, biomaterials, glass, and food. Currently, in 3D printing technology, the printing mode of direct writing forming is widely applied. The raw material used is ceramic powder, and the direct writing forming of the ceramic could be applied to various fields of materials, chemistry, chemical engineering, and the like. This work is aimed at printing the nanopowder of nonsegregated waste into conventional components. The work is related to a system for converting nonsegregated waste material into the synthesized dough, comprising of a chamber, an ultraviolet (UV) disinfectant unit, a shedder, and a storage unit. The nonsegregated waste material is stored inside the chamber which dispenses the nonsegregated waste material into the UV disinfectant unit; said UV disinfectant unit removes the harmful germs and water content in the nonsegregated waste material to form solid waste. The disinfected solid waste enters the shedder which powders the solid waste. The powdered solid waste is stored in the storage unit. The powdered solid waste is mixed with components in a mixer to form a synthesized dough. The synthesized dough as the printable source is sent to a 3D printer which prints desired final component. The hardness value obtained for the printed component is 70 Brinell hardness units.

show abstract

Section: Introductionmentioning

confidence: 99%

Hybrid Novel Additive Manufacturing for Sustainable Usage of Waste

Balaji

Bhuvaneswari

Arulmurugan

et al. 2022

Journal of Nanomaterials

View full text Add to dashboard Cite

show abstract

“…(2) interference by contaminants in the polymer matrix, such as additives including pigments, fillers, and talc [9]; and (3) changes in the polymer structure, including alteration in the crystallinity and lamellar shape, polymer mixing, and changes in the number of tie molecules between lamellae [10,11].…”

Section: Introductionmentioning

confidence: 99%

“…The deterioration of the mechanical properties of recycled plastics is caused by several complex factors: chemical-degradation-induced molecular weight reduction [ 7 , 8 ]; interference by contaminants in the polymer matrix, such as additives including pigments, fillers, and talc [ 9 ]; and changes in the polymer structure, including alteration in the crystallinity and lamellar shape, polymer mixing, and changes in the number of tie molecules between lamellae [ 10 , 11 ]. …”

Section: Introductionmentioning

confidence: 99%

“…interference by contaminants in the polymer matrix, such as additives including pigments, fillers, and talc [ 9 ]; and…”

Section: Introductionmentioning

confidence: 99%

“…In the case of (1), the lost molecular weight cannot be restored. In contrast, in the cases of (2) and (3), by using a compounding process and optimizing the mixing conditions, the polymers and contaminants can be effectively mixed, thus mitigating any harmful effects [ 9 , 12 ]. In our previous study [ 13 ], the tensile properties of recycled plastic compounds were restored to the those of virgin plastics by molding plastic pellets under optimal press-molding conditions.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effects of a Twin-Screw Extruder Equipped with a Molten Resin Reservoir on the Mechanical Properties and Microstructure of Recycled Waste Plastic Polyethylene Pellet Moldings

et al. 2021

View full text Add to dashboard Cite

Each year, increasing amounts of plastic waste are generated, causing environmental pollution and resource loss. Recycling is a solution, but recycled plastics often have inferior mechanical properties to virgin plastics. However, studies have shown that holding polymers in the melt state before extrusion can restore the mechanical properties; thus, we propose a twin-screw extruder with a molten resin reservoir (MSR), a cavity between the screw zone and twin-screw extruder discharge, which retains molten polymer after mixing in the twin-screw zone, thus influencing the polymer properties. Re-extruded recycled polyethylene (RPE) pellets were produced, and the tensile properties and microstructure of virgin polyethylene (PE), unextruded RPE, and re-extruded RPE moldings prepared with and without the MSR were evaluated. Crucially, the elongation at break of the MSR-extruded RPE molding was seven times higher than that of the original RPE molding, and the Young’s modulus of the MSR-extruded RPE molding was comparable to that of the virgin PE molding. Both the MSR-extruded RPE and virgin PE moldings contained similar striped lamellae. Thus, MSR re-extrusion improved the mechanical performance of recycled polymers by optimizing the microstructure. The use of MSRs will facilitate the reuse of waste plastics as value-added materials having a wide range of industrial applications.

show abstract