TY - JOUR
T1 - Polymer-inorganic hybrid colloids for ultraviolet-assisted direct ink write of polymer nanocomposites
AU - Scott, Philip J.
AU - Rau, Daniel A.
AU - Wen, Jianheng
AU - Nguyen, Mai
AU - Kasprzak, Christopher R.
AU - Williams, Christopher B.
AU - Long, Timothy E.
N1 - Funding Information:
Funding for this research was provided by the Division of Civil, Mechanical, and Manufacturing Innovation (CMMI), an organization of the National Science Foundation, under award number 1762712. The authors thank our GOALI partner on this grant, Michelin North America Inc. for their collaboration and expertise throughout this work. The authors thank Steve McCartney and the Nanoscale Characterization and Fabrication Laboratory (NCFL) at Virginia Tech for expertise and instrumentation for electron microscopy. The authors also thank Prof. Michael Bortner for his rheological expertise. The authors thank Michael Berg and Nissan Chemical Corp as well as Dan Derbyshire and Mallard Creek Polymers for answering questions regarding supplied materials and their generous donation of colloidal silica nanoparticles and SBR latex, respectively.
Funding Information:
Funding for this research was provided by the Division of Civil, Mechanical, and Manufacturing Innovation (CMMI) , an organization of the National Science Foundation , under award number 1762712 . The authors thank our GOALI partner on this grant, Michelin North America Inc., for their collaboration and expertise throughout this work. The authors thank Steve McCartney and the Nanoscale Characterization and Fabrication Laboratory (NCFL) at Virginia Tech for expertise and instrumentation for electron microscopy. The authors also thank Prof. Michael Bortner for his rheological expertise. The authors thank Michael Berg and Nissan Chemical Corp as well as Dan Derbyshire and Mallard Creek Polymers for answering questions regarding supplied materials and their generous donation of colloidal silica nanoparticles and SBR latex, respectively.
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/10
Y1 - 2020/10
N2 - Inorganic-polymer hybrid colloids present a modular and tunable route to fabricate polymer nanocomposites from low viscosity precursors; however, their use in additive manufacturing remains limited. This manuscript describes photocurable “hybrid colloids” to enable layered fabrication of elastomeric nanocomposites, i.e., combination of continuous-phase photocrosslinking chemistry with hybrid colloids of water-dispersible silica nanoparticles and styrene-butadiene rubber (SBR) latex particles. Varying the relative concentrations of polymeric and inorganic particles afforded precise tuning of filler loading in the final nanocomposite and introduced a bimodal particle size distribution with desirable rheological behavior for extrusion-based additive manufacturing. Specifically, ultraviolet-assisted direct ink write (UV-DIW) processing of the photocurable hybrid colloid pastes generated free-standing green bodies, which contained a combination of SBR and silica nanoparticles. Subsequent drying of the green bodies allowed SBR particle coalescence and penetration through the scaffold and surrounding the silica nanoparticles, which yielded a semi-interpenetrating network (sIPN) nanocomposite. Facile tuning of silica concentrations in the hybrid colloid enabled tuning of both the colloidal ink rheology and mechanical properties of the final sIPN nanocomposites to achieve additive manufacturing of silica-SBR nanocomposites with ultimate tensile strains exceeding 300 % and ultimate tensile strengths above 10 MPa.
AB - Inorganic-polymer hybrid colloids present a modular and tunable route to fabricate polymer nanocomposites from low viscosity precursors; however, their use in additive manufacturing remains limited. This manuscript describes photocurable “hybrid colloids” to enable layered fabrication of elastomeric nanocomposites, i.e., combination of continuous-phase photocrosslinking chemistry with hybrid colloids of water-dispersible silica nanoparticles and styrene-butadiene rubber (SBR) latex particles. Varying the relative concentrations of polymeric and inorganic particles afforded precise tuning of filler loading in the final nanocomposite and introduced a bimodal particle size distribution with desirable rheological behavior for extrusion-based additive manufacturing. Specifically, ultraviolet-assisted direct ink write (UV-DIW) processing of the photocurable hybrid colloid pastes generated free-standing green bodies, which contained a combination of SBR and silica nanoparticles. Subsequent drying of the green bodies allowed SBR particle coalescence and penetration through the scaffold and surrounding the silica nanoparticles, which yielded a semi-interpenetrating network (sIPN) nanocomposite. Facile tuning of silica concentrations in the hybrid colloid enabled tuning of both the colloidal ink rheology and mechanical properties of the final sIPN nanocomposites to achieve additive manufacturing of silica-SBR nanocomposites with ultimate tensile strains exceeding 300 % and ultimate tensile strengths above 10 MPa.
KW - 3D printing
KW - Hybrid latex
KW - Polymer nanocomposite elastomer
KW - Silica nanoparticles
KW - Styrene-butadiene rubber (SBR)
KW - UV-assisted direct ink write (UV-DIW) additive manufacturing
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U2 - 10.1016/j.addma.2020.101393
DO - 10.1016/j.addma.2020.101393
M3 - Article
AN - SCOPUS:85086984817
SN - 2214-8604
VL - 35
JO - Additive Manufacturing
JF - Additive Manufacturing
M1 - 101393
ER -