Multi-layered polymerized high internal phase emulsions with controllable porosity and strong interfaces

McKenzie, Tucker J.; Smail, Soren; Rost, Kathryn; Rishi, Kabir; Beaucage, Gregory; Ayres, Neil

doi:10.1016/j.polymer.2021.124116

Cited by 8 publications

(11 citation statements)

References 62 publications

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“…We also observe sections of the material where the surface is smooth consisting of regions of non-porous bulk PDMS. This partially interconnected pore structure has been previously observed 23,36,37 as the aqueous dispersed phase droplets prefer an aggregated morphology when Silube is used as the surfactant in water-in-PDMS emulsions.…”

Section: Resultssupporting

confidence: 70%

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Mechanically tunable PDMS-based polyHIPE acoustic materials

et al. 2022

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Section: Resultssupporting

confidence: 70%

“…In this work, we prepared PDMS elastomers using thiol-ene click reactions (Scheme 1a) following our reported protocols, 36,37 where the ratio of thiol-functionalized PDMS and vinyl-terminated PDMS was systematically changed to control crosslinking density (Scheme 1b).…”

Section: Resultsmentioning

confidence: 99%

Mechanically tunable PDMS-based polyHIPE acoustic materials

et al. 2022

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“…In addition to the preparation of copolyHIPEs, two copolymerizable components can also be used to prepare bilayered polyHIPEs. ,, A bilayered PBLG–PCL polyHIPE consists of the stiff PBLG layer and the softer PCL layer covalently bonded to each other. Since the PBLG and PCL layers swell and deswell similarly during purification, both layers and the interface withstand purification and freeze-drying without shape deformation (Figure A).…”

Section: Resultsmentioning

confidence: 99%

Synthetic Polypeptide–Polyester PolyHIPEs Prepared by Thiol–Ene Photopolymerization

et al. 2022

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Synthetic polypeptides and aliphatic polyesters represent promising materials in biomedical applications due to their degradability and biocompatibility. In this work, we investigated the preparation and properties of porous synthetic polypeptide–polyester materials prepared by thiol–ene photopolymerization of allyl-functionalized star macromonomers based on poly(γ-benzyl-l-glutamate) (PBLG) and poly(ε-caprolactone) (PCL). We copolymerized the macromonomers in the continuous phase of high internal phase emulsions (HIPEs) to obtain highly porous polyHIPEs. We demonstrated that the PBLG polyHIPE is a stiffer material compared to the softer PCL polyHIPE, while the copolyHIPEs composed of both components have a combination of thermomechanical properties that can be tuned by varying the chemical composition. Moreover, using a thiol–ene HIPE-templating approach, we were able to prepare a bilayered PBLG–PCL polyHIPE consisting of two chemically and mechanically distinct layers covalently bonded with a thin and robust interface while maintaining the typical polyHIPE morphology throughout the material.

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“…Our lab has synthesized PDMS polyMIPE polyHIPEs with tunable porosity and storage moduli using thiol- and ene-functionalized PDMSs. , Recently, we reported thiol–ene PDMS polyMIPEs that resulted in low longitudinal sound speeds of ∼40 m/s through the polyMIPEs at ultrasonic frequencies. The storage modulus ( G ′) was dependent on the thiol to ene ratio of the PDMS components and polyMIPEs, and G ′ values from ∼40 to 230 kPa could be obtained at a single porosity of ∼40%.…”

Section: Siliconesmentioning

confidence: 99%

Synthesis and Applications of Elastomeric Polymerized High Internal Phase Emulsions (PolyHIPEs)

McKenzie

Ayres

2023

ACS Omega

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Polymer foams (PFs) are among the most industrially produced polymeric materials, and they are found in applications including aerospace, packaging, textiles, and biomaterials. PFs are predominantly prepared using gas-blowing techniques, but PFs can also be prepared from templating techniques such as polymerized high internal phase emulsions (polyHIPEs). PolyHIPEs have many experimental design variables which control the physical, mechanical, and chemical properties of the resulting PFs. Both rigid and elastic polyHIPEs can be prepared, but while elastomeric polyHIPEs are less commonly reported than hard polyHIPEs, elastomeric polyHIPEs are instrumental in the realization of new materials in applications including flexible separation membranes, energy storage in soft robotics, and 3D-printed soft tissue engineering scaffolds. Furthermore, there are few limitations to the types of polymers and polymerization methods that have been used to prepare elastic polyHIPEs due to the wide range of polymerization conditions that are compatible with the polyHIPE method. In this review, an overview of the chemistry used to prepare elastic polyHIPEs from early reports to modern polymerization methods is provided, focusing on the applications that flexible polyHIPEs are used in. The review consists of four sections organized around polymer classes used in the preparation of polyHIPEs: (meth)acrylics and (meth)acrylamides, silicones, polyesters and polyurethanes, and naturally occurring polymers. Within each section, the common properties, current challenges, and an outlook is suggested on where elastomeric polyHIPEs can be expected to continue to make broad, positive impacts on materials and technology for the future.

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Multi-layered polymerized high internal phase emulsions with controllable porosity and strong interfaces

Cited by 8 publications

References 62 publications

Mechanically tunable PDMS-based polyHIPE acoustic materials

Mechanically tunable PDMS-based polyHIPE acoustic materials

Synthetic Polypeptide–Polyester PolyHIPEs Prepared by Thiol–Ene Photopolymerization

Synthesis and Applications of Elastomeric Polymerized High Internal Phase Emulsions (PolyHIPEs)

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