Remanufacturing of end-of-life glass-fiber reinforced composites via UV-assisted 3D printing

Mantelli, Andrea; Levi, Marinella; Turri, Stefano; Suriano, Raffaella

doi:10.1108/rpj-01-2019-0011

Cited by 13 publications

(15 citation statements)

References 34 publications

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“…As a consequence, From Figure 7b, the elongation at break values for all the composite materials are lower than neat resin. As supposed in other works [14,15], this could be attributed to the poor adhesion between the matrix and the filler particles. Moreover, failure properties for recycled GF formulations are better than virgin GF composite except for 60GAMF printed at 0.25 mm layer height.…”

Section: Sem Imagingsupporting

confidence: 59%

“…As previously mentioned by Mantelli et al [15], a post-curing cycle is needed to increase the polymerization conversion of the 3D-printed material. In fact, the 3D-printed objects were only partially photo-crosslinked during the 3D printing process.…”

Section: Additive Re-manufacturing and Post-curingmentioning

confidence: 98%

“…By adding a UV source on the extruder head, the resulting 3D printable ink (or material) was able to start its polymerization directly "in situ", which means immediately after the extrusion, avoiding collapses of the 3D printed structure with UV irradiation (UV-LDM process). Afterwards, the polymerization has to be completed by means of a post-curing treatment developed in the previous work [15].…”

Section: Uv-ldm and Glass Fibers Requirementsmentioning

confidence: 99%

“…The main 3D printing parameters for the different batches are listed in Table 2. Batches 1 and 2 (Neat Resin and 50FIL100), already presented by Mantelli et al [15], were used as a benchmark for the mechanical tests. Specifically, specimens of the Batch 1 were produced by casting the neat resin in silicon-based molds, whereas the others were obtained with the UV-LDM process.…”

Section: Mechanical Behaviormentioning

confidence: 99%

“…Very recently, the possibility of reusing mechanically recycled GFRPs in a curable matrix was presented in our previous works [14]. However, the elastic modulus of these 3D printed composites with recycled glass fibers (rGFs) was not comparable to those loaded with virgin glass fibers [15]. Even though the mechanical properties were not high enough because of the low glass fiber content in the recyclates, the potential of 3D printing recycled composites was demonstrated.…”

Section: Introductionmentioning

confidence: 99%

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Additive Re-Manufacturing of Mechanically Recycled End-of-Life Glass Fiber-Reinforced Polymers for Value-Added Circular Design

et al. 2020

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Despite the large use of composites for industrial applications, their end-of-life management is still an open issue for manufacturing, especially in the wind energy sector. Additive manufacturing technology has been emerging as a solution, enhancing circular economy models, and using recycled composites for glass fiber-reinforced polymers is spreading as a new additive manufacturing trend. Nevertheless, their mechanical properties are still not comparable to pristine materials. The purpose of this paper is to examine the additive re-manufacturing of end-of-life glass fiber composites with mechanical performances that are comparable to virgin glass fiber-reinforced materials. Through a systematic characterization of the recyclate, requirements of the filler for the liquid deposition modeling process were identified. Printability and material surface quality of different formulations were analyzed using a low-cost modified 3D printer. Two hypothetical design concepts were also manufactured to validate the field of application. Furthermore, an understanding of the mechanical behavior was accomplished by means of tensile tests, and the results were compared with a benchmark formulation with virgin glass fibers. Mechanically recycled glass fibers show the capability to substitute pristine fillers, unlocking their use for new fields of application.

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Section: Sem Imagingsupporting

confidence: 59%

Section: Additive Re-manufacturing and Post-curingmentioning

confidence: 98%

Section: Uv-ldm and Glass Fibers Requirementsmentioning

confidence: 99%

Section: Mechanical Behaviormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Additive Re-Manufacturing of Mechanically Recycled End-of-Life Glass Fiber-Reinforced Polymers for Value-Added Circular Design

et al. 2020

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2022

4D Printing 2

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Direct Ink Writing of Recycled Composites with Complex Shapes: Process Parameters and Ink Optimization

et al. 2021

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Within the complex framework of additive manufacturing, direct ink writing (DIW) processes significantly contribute to extending the range of 3D‐printable materials (i.e., thermosetting resins, ceramics, hydrogels). Thanks to this technology, viscous inks are easily extruded for the creation of 3D structures. Nevertheless, the quick recovery of the solid‐like behavior after extrusion remains one of the most crucial open issues for 3D‐printable inks. The main goal herein is to improve the printability of a UV‐curable thermosetting composite ink reinforced with mechanically recycled glass fiber composites by modifying its rheological behavior. The overall process is optimized, leading to the definition of the optimal extrusion parameters for these types of materials. Furthermore, the retraction mode is successfully developed for the DIW of recycled composites. Additional features are achieved, thanks to the aforementioned improvements, such as 3D complex shapes, assembled pieces, and/or moving built‐in mechanisms, increasing the number of new potential applications of recycled glass fiber‐reinforced polymers.

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Remanufacturing of end-of-life glass-fiber reinforced composites via UV-assisted 3D printing

Cited by 13 publications

References 34 publications

Additive Re-Manufacturing of Mechanically Recycled End-of-Life Glass Fiber-Reinforced Polymers for Value-Added Circular Design

Additive Re-Manufacturing of Mechanically Recycled End-of-Life Glass Fiber-Reinforced Polymers for Value-Added Circular Design

Getting Things Moving

Direct Ink Writing of Recycled Composites with Complex Shapes: Process Parameters and Ink Optimization

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