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On the Use of Surfactant-Complexed Chitosan for Toughening 3D Printed Polymethacrylate Composites

Journal Article · · Macromolecular Materials and Engineering
 [1];  [2];  [3];  [4];  [5];  [2]
  1. Batangas State University (Philippines)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. De La Salle University, Manila (Philippines); Case Western Reserve Univ., Cleveland, OH (United States)
  4. University of the Philippines, Diliman (Philippines)
  5. Kansai University (Japan)

This work reports a simple approach to prepare toughened 3D-printed polymethacrylate (PMA) composites using surfactant-modified chitosan (SMCS) particles at loadings between 2–10 wt%. Chitosan (CS) is modified with anionic surfactant, sodium dodecyl sulfate, via ionic complexation to facilitate compatibility and dispersion of CS to PMA matrix by non-covalent interactions between the components. The study successfully demonstrates high-accuracy 3D printing of composites with significant improvements in the overall mechanical properties. The composite with the best loading of 8 wt% SMCS shows a tensile modulus of 1.23 ± 0.05 GPa, a tensile strength at 49.8 ± 0.96 MPa, a yield stress at 33.3 ± 1.48 MPa, and a strain-at-ailure 10.3 ± 0.61%, which are 45%, 40%, 32%, and 68% higher than neat PMA, respectively. This provides a significant improvement in toughness at 4.92 ± 0.55 MJ m-3 for the composite, 184% higher than that of neat PMA. The marked increase in toughness is due to enhanced filler-matrix interactions which improve the ability of the 3D printed composite to absorb energy under tensile load. The results from this work provide new understandings into the strategies for design and preparation of stereolithography 3D printed materials reinforced with toughening fillers from renewable resources.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1814301
Journal Information:
Macromolecular Materials and Engineering, Journal Name: Macromolecular Materials and Engineering Journal Issue: 1 Vol. 306; ISSN 1438-7492
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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