Interplay between yielding, 'recovery', and strength of yield stress fluids for direct ink writing: new insights from oscillatory rheology.

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  • Additional Information
    • Source:
      Publisher: Royal Society of Chemistry Country of Publication: England NLM ID: 101295070 Publication Model: Electronic Cited Medium: Internet ISSN: 1744-6848 (Electronic) Linking ISSN: 1744683X NLM ISO Abbreviation: Soft Matter Subsets: PubMed not MEDLINE; MEDLINE
    • Publication Information:
      Original Publication: Cambridge, England : Royal Society of Chemistry, 2005-
    • Abstract:
      Formulation design and rheology are critical for successful manufacturing via direct ink writing (DIW), thus linking rheology and printability is a growing area of research amongst the DIW and rheology communities. This work provides an extensive rheological investigation into the material strength, yielding and 'recovery' properties of graphite (Gr)-hydrogel based formulations. Using state-of-the-art Large Amplitude Oscillatory Shear (LAOS) techniques, Fourier Transform (FT) rheology and sequence of physical process (SPP) analysis, and 3-step 'recovery' tests we provide new insights on the yielding phenomenon, energy transitions and microstructural changes that the formulations undergo. The insights from the rheology experiments are combined with in situ and continuous monitoring during the printing process. From these analyses, we select rheological metrics or descriptors to quantify flowability, recoverability, and material strength. There is a threshold concentration of Gr powders (30 wt%) at which there is a shift in the yielding process. Below this threshold (for the F127 hydrogel and mixtures with low Gr content), perfect plastic dissipation ratio ( ϕ ) values are close to 0 in the LVR and then steeply increase to close to 1 after the cross-over in a narrow strain (and stress) space. As Gr concentration increases, and print quality gets worse, ϕ values consistently increase in the LVR and at any given γ 0 , evidencing an increased energy dissipation throughout the flow transition region. Lissajous-Bowditch curves and SPP Cole-Cole plots illustrate these trends. The extent of the 'recovery' (quantified by the mutation time, λ I , and the storage modulus 'recovered' after large deformations ) is also directly related to Gr content, with higher loading resulting in lesser recovery. Our findings provide a comprehensive set of metrics to characterise complex (yield stress) fluids for DIW using three property maps, one for each stage: flowability or yielding process, recoverability and material strength. The results demonstrate that considering these three maps holistically provides insightful trends to guide formulation design and assess performance in DIW.
    • References:
      Adv Mater. 2014 Apr 2;26(13):2022-7. (PMID: 24343930)
      Chem Rev. 2021 Feb 10;121(3):1623-1669. (PMID: 33356176)
      Adv Mater. 2019 Sep;31(37):e1902725. (PMID: 31343084)
      Soft Matter. 2024 Sep 11;20(35):6868-6888. (PMID: 39028363)
      Proc Natl Acad Sci U S A. 2024 May 28;121(22):e2401409121. (PMID: 38776367)
      Chem Rev. 2020 Oct 14;120(19):11028-11055. (PMID: 32856892)
      Soft Matter. 2019 Feb 6;15(6):1444-1456. (PMID: 30667028)
      ACS Appl Mater Interfaces. 2021 Dec 29;13(51):61610-61619. (PMID: 34910475)
      Science. 2006 Jan 27;311(5760):515-8. (PMID: 16439659)
      Science. 2008 Dec 5;322(5907):1516-20. (PMID: 19056979)
      APL Bioeng. 2021 Feb 04;5(1):011502. (PMID: 33564740)
      Adv Mater. 2015 Mar 11;27(10):1688-93. (PMID: 25605024)
      Sci Rep. 2017 Jul 20;7(1):6017. (PMID: 28729671)
      Adv Mater. 2016 Apr 6;28(13):2587-94. (PMID: 26833897)
      Proc Natl Acad Sci U S A. 2020 Sep 8;117(36):21945-21952. (PMID: 32839307)
      Adv Mater. 2018 Apr;30(15):e1706383. (PMID: 29484726)
      ACS Appl Mater Interfaces. 2017 Sep 27;9(38):32977-32989. (PMID: 28898053)
      Acta Biomater. 2010 Jan;6(1):218-28. (PMID: 19563923)
      ACS Appl Mater Interfaces. 2018 Jul 11;10(27):23353-23361. (PMID: 29493215)
      Biophys Rev. 2016 Dec;8(4):409-427. (PMID: 28510011)
      iScience. 2021 Mar 19;24(4):102332. (PMID: 33889825)
      Biomacromolecules. 2009 Jul 13;10(7):1689-96. (PMID: 19445533)
      Sci Rep. 2017 Oct 23;7(1):13759. (PMID: 29062036)
      ACS Appl Mater Interfaces. 2017 Oct 25;9(42):37136-37145. (PMID: 28920439)
      Phys Rev Lett. 2021 May 28;126(21):218002. (PMID: 34114843)
    • Publication Date:
      Date Created: 20240911 Latest Revision: 20240926
    • Publication Date:
      20240926
    • Accession Number:
      PMC11388702
    • Accession Number:
      10.1039/d4sm00758a
    • Accession Number:
      39258474