Closed-loop recycling of polyamide12 powder from selective laser sintering into sustainable composites

JOURNAL OF CLEANER PRODUCTION

卷:195

Article

Wang, Lu¹  Kiziltas, Alper²  Mielewski, Deborah E.²  Lee, Ellen C.²  Gardner, Douglas J.¹ 

[1] Univ Maine, Adv Struct & Composites Ctr, 35 Flagstaff Rd, Orono, ME 04469 USA

[2] Ford Motor Co, Mat Res & Adv Engn, 2101 Village Rd, Dearborn, MI 48124 USA

关键词: Additive manufacturing;    Fused deposition modeling;    3D printing;    Carbon fiber;    Nylon;    Aspect ratio;    Crystallinity;    Dispersion;   

DOI  :  10.1016/j.jclepro.2018.05.235

来源: Elsevier

【 摘 要 】

A considerable amount of powder residue is generated during the selective laser sintering (SLS) process. Processing the powder residue into filaments for extrusion-based additive manufacturing (EAM) provides an opportunity to recycle SLS residue without significantly reducing its value. In this study, the feasibility of using a milled carbon fiber (mCF)/recycled polyamide12 (rPA12) composite filament for EAM was demonstrated. A microscopic study on the morphology of mCF showed that mCF is a short and smooth fiber. The mCF did not significantly change the melting temperature, crystallization temperature or crystallinity of rPA12 as measured by differential scanning calorimetry (DSC). A morphological study on the fracture-surface of the composites revealed that there was moderate interfacial interaction between the mCF and PA12. Tensile strength, tensile modulus, flexural strength, flexural modulus and impact strength of rPA12 were improved by 35%, 163%, 61%, 138% and 23%, respectively with the addition of 30 wt.% mCF. (C) 2018 Elsevier Ltd. All rights reserved.

【 授权许可】

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