Investigating the morphological transitions in an associative surfactant ternary system

Honaryar, Houman; LaNasa, Jacob A.; Hickey, Robert J.; Shillcock, Julian C.; Niroobakhsh, Zahra

doi:10.1039/d1sm01668g

Cited by 4 publications

(3 citation statements)

References 86 publications

(236 reference statements)

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“…Furthermore, the storage moduli for all four bijels were shown to be nearly independent of angular frequency (ω), that combined with the dominant elastic component suggests a solid-like viscoelastic behavior. [48,49] Such behavior has also been reported for other bicontinuous structures such as the ones made from a ternary blend of two polymers and silica particles. [50] Moreover, a local minimum in G 00 curve is observed in frequency sweep results (Figure 6), similar to what is reported in another bijel study, supposedly due to various relaxation processes at short and long time scales, corresponding to high-and low-frequency range, respectively.…”

Section: Rheological Properties Of Printed Bijelssupporting

confidence: 58%

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Fabrication of Bijels via Solvent Transfer‐Induced Phase Separation using Liquid‐in‐Liquid Printing

Amirfattahi,

Honaryar,

Niroobakhsh

2023

Small Structures

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Bicontinuous interfacially jammed emulsion gels or bijels are a new class of soft materials containing both surfactants and particles. They are, however, distinguished from conventional surfactant‐stabilized and particle‐stabilized systems. Due to the partitioning of percolating sheets of particles in a bicontinuous morphology, the interpenetrating phases are stabilized by kinetically arresting the phase separation process. This leads to the generation of rheological features in bijels with a range of viscoelastic properties based on types, size, anisotropy, and volume fractions of particles. Research on bijels has been around for only about 15 years, and the need for substantial research is recognized in the fabrication of bijels. Herein, the focus is on fabricating on fabricating bijels using solvent transfer‐induced phase separation (STRIPS) and from polar oils, cationic/anionic surfactants, and various nanoparticles to investigate their microstructure–properties relation. Using the newly emerged liquid‐in‐liquid 3D printing approach, the fabrication of these bijels via STRIPS into arbitrary complex designs which are not reported before is shown. The rheological properties of the printed bijels and the baths used for printing are characterized. This work paves the way for the production of bijels using a broader range of materials and hence their application in various fields.

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Section: Rheological Properties Of Printed Bijelssupporting

confidence: 58%

Section: Resultsmentioning

confidence: 99%

Fabrication of Bijels via Solvent Transfer‐Induced Phase Separation using Liquid‐in‐Liquid Printing

Amirfattahi,

Honaryar,

Niroobakhsh

2023

Small Structures

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“…[8,34] Further experiments and simulations studies also suggest that self-assembly phase transition is attributed to the cosurfactancy of the surface-active oil, and the primary factor for the phase transition cannot be the electrostatic interaction as most oil molecules remain protonated and neutral. [8,34,59] Using this approach, various 2D and 3D designs were fabricated from the low viscous aqueous solution of surfactants (Figure 3F-left). Furthermore, by incorporating a photocurable polymer into the aqueous ink before printing, the printed constructs were solidified through UV radiation, yielding robust constructs with complex shapes (Figure 3F-right).…”

Section: Surfactants and Cosurfactantsmentioning

confidence: 99%

Associative Liquid‐In‐Liquid 3D Printing Techniques for Freeform Fabrication of Soft Matter

Honaryar

Amirfattahi

Niroobakhsh

2023

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processing, and enable numerous inks to be utilized within the same printed construct. However, most soft materials are not widely applicable to such traditional ink-based 3D printing techniques, specifically when necessary physicochemical properties such as certain rheological behavior and crosslinking mechanisms are lacking. Complementary to the ink-based printing approaches described above, the light-based 3D printing modalities, also known as vat polymerization-based 3D printing, are the other technology in place for soft materials in which a photocurable liquid resin stored in a vat (tank) is treated layer-by-layer with either visible or UV light. [7] Typical light-based 3D printing techniques for soft matter include stereolithography, digital light processing, continuous liquid interface production, and two-photon polymerization. [1,7] Despite the superior printing resolution, accuracy, speed, and the freedom to print very complex and delicate parts, the light-based printing techniques suffer from several drawbacks including a limited selection of processable photocurable resins and challenges in realizing multimaterial 3D printing in a single build process. Furthermore, using ink-or light-based printing modalities, it is challenging, if not impossible, to shape soft matters into freeform complex 3D designs, in which the printing can be performed in an omnidirectional manner (not limited to layer-by-layer patterning). Freeform 3D printing removes restrictions on structural complexity, allowing overhanging parts, internal void spaces, and disconnected features to be created. Thus, to overcome the inherent difficulties associated with printing soft matter discussed above and to enable freeform fabrication from an ever-broadening palette of soft materials, liquid-in-liquid 3D printing (LL3DP) approach has emerged as a new class of 3D printing techniques. [8][9][10][11]15,16,22] The LL3DP approaches fall under the category of ink-based 3D printing (Figure 1) since the printing materials (that make up the final part) are printed in the form of an ink as opposed to light-based (vat polymerization-based) 3D printing in which the printing materials are contained in a vat and cured selectively. In LL3DP techniques, while the translation stage moves according to a 3D design, the ink phase is extruded into a meticulously selected second bath phase. [8][9][10][11] The extrusion of the ink within the bath phase prevents the print collapse and ensures the shape fidelity, structural integrity, and necessary feature resolution of the final constructs. [8][9][10][11] By adopting such printing approaches, freeform fabrication Shaping soft materials into prescribed 3D complex designs has been challenging yet feasible using various 3D printing technologies. For a broader range of soft matters to be printable, liquid-in-liquid 3D printing techniques have emerged in which an ink phase is printed into 3D constructs within a bath. Most of the attention in this field has been focused on using a support bath with favorable rheology ...

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Rheological analysis of a novel phenylboronic acid-closomer gel

Akinjole

Honaryar

Coulibaly

et al. 2022

International Journal of Pharmaceutics

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Investigating the morphological transitions in an associative surfactant ternary system

Abstract: Associating surfactants involving polar oils have recently been shown to stabilize immiscible liquids by forming nanostructures at the liquid interface and have been used to print soft materials. Although these...

Cited by 4 publications

References 86 publications

Fabrication of Bijels via Solvent Transfer‐Induced Phase Separation using Liquid‐in‐Liquid Printing

Fabrication of Bijels via Solvent Transfer‐Induced Phase Separation using Liquid‐in‐Liquid Printing

Associative Liquid‐In‐Liquid 3D Printing Techniques for Freeform Fabrication of Soft Matter

Rheological analysis of a novel phenylboronic acid-closomer gel

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