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- W4386190038 abstract "3D printing waste (3DPW) contains hazardous substances, such as photosensitizers and pigments, and may cause environmental pollution when improperly disposed of. Pyrolysis treatment can reduce hazards and turn waste into useful resources. This study coupled thermogravimetric (TG), TG-Fourier transform infrared spectroscopy-gas chromatography/mass spectrometry, and rapid pyrolysis gas chromatography/mass spectrometry analyses to evaluate the pyrolytic reaction mechanisms, products, and possible decomposition pathways of the three typical 3DPW of photosensitive resin waste (PRW), polyamide waste (PAW), and polycaprolactone waste (PCLW). The main degradation stages of the typical 3DPW occurred at 320–580 °C. The most appropriate reaction mechanisms of PRW, PAW and PCLW were D1, A1.2 and A1.5, respectively. The main pyrolysis processes were the decomposition of the complex organic polymers of PRW, the breaking of the NH-CH2 bond and dehydration of -CO-NH- of PAW, and the breaking and reorganization of the molecular chains of PCLW, mainly resulting in toluene (C7H8), undecylenitrile (C11H21N), tetrahydrofuran (C4H8O), respectively. Unlike the slow pyrolysis, the rapid pyrolysis produced volatiles consisting mainly of phenol, 4,4'-(1-methylethylidene)bis- (C15H16O2) for PRW; 1,10-dicyanodecane (C12H20N2) for PAW; and ɛ-caprolactone (C6H10O2) for PCLW. These pyrolysis products hold great potential for applications. The findings of the study offer actionable insights into the hazard reduction and resource recovery of 3D printing waste. With the rise of the 3D printing industry comes the inevitable generation of 3D printing waste (3DPW). However, 3DPW contains hazardous compounds such as photosensitive resins, photosensitizers, pigments and so on. Therefore, its improper disposal will cause the waste of resources and environmental pollution. The pyrolysis technology can effectively reduce the production of volatile organic compounds and obtain value-added chemicals. This study elucidated the pyrolysis kinetics, mechanisms, products, energetically optimal pyrolytic settings, and possible degradation pathways for 3DPW, providing new insights into the treatment of hazardous 3DPW to enable their environmentally friendly disposal and sustainable utilization." @default.
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- W4386190038 date "2023-10-01" @default.
- W4386190038 modified "2023-09-30" @default.
- W4386190038 title "Actionable insights into hazard mitigation of typical 3D printing waste via pyrolysis" @default.
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- W4386190038 doi "https://doi.org/10.1016/j.jhazmat.2023.132414" @default.
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