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Title: Coal polymer composites prepared by fused deposition modeling (FDM) 3D printing

Journal Article · · Journal of Materials Science
 [1];  [2]; ORCiD logo [3];  [1]; ORCiD logo [4]; ORCiD logo [4];  [5];  [2];  [6]; ORCiD logo [7]
  1. Univ. of Tennessee, Knoxville, TN (United States)
  2. Pakistan Institute of Engineering and Applied Sciences, Faisalabad (Pakistan). National Institute for Biotechnology and Genetic Engineering Constituent College (NIBGE-C)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Joint Institute for Biological Sciences (JIBS)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  5. Univ. of Tennessee, Knoxville, TN (United States). Joint Institute for Advanced Materials, JIAM Diffraction Facility
  6. Univ. of Tennessee, Knoxville, TN (United States). Center for Renewable Carbon
  7. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Joint Institute for Biological Sciences (JIBS); Univ. of Tennessee, Knoxville, TN (United States). Center for Renewable Carbon

Coal is a vital energy resource worldwide, but pollutants and greenhouse gases from its combustion cause environmental problems. To explore the non-combustion approach to use and valorize coal, anthracite and lignite were blended with polyamide 12 (PA 12) through FDM printing in this work and compared in the composites. By adding lignite, Young’s modulus improved with increasing loading to 50 wt% while tensile strength leveled off among the composites, compared to that of PA 12. By contrast, the addition of anthracite decreased the tensile performance at all loadings. Rheology tests and morphology analyses suggested that the interactions between fillers (anthracite and lignite) and PA 12 may cause differences in tensile properties. In addition, the printed lignite composites showed improved thermal conductivity (~ twofold), indicating lignite demonstrates the potential to build functional composites. This work provides a strategy to use lignite in composites by 3D printing for value-added products and reduces the demand for petroleum-based polymers. Overall, our approach diverts lignite from combustion processes and alleviates the negative impact of lignite use on the environment.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1875332
Journal Information:
Journal of Materials Science, Journal Name: Journal of Materials Science Journal Issue: 22 Vol. 57; ISSN 0022-2461
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English

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