Ethan I. L. Jull

Insight into the composition-dependent transition from auxetic nematic to frustrated smectic in liquid crystal elastomers

Anonymous, Stuart R. Berrow, K. S. Margaryan, Gevorg S. Gevorgyan et autres

The ability to optimize the properties of a material is particularly advantageous for applications. Here the tuneable properties of side-chain liquid crystal elastomers (LCEs) are investigated. LCEs were fabricated using the same acrylate monomers, varying the proportion of mesogenic groups to influence …

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Shaping boundaries to control and transport topological defects in colloidal nematic liquid crystals

Gerardo Campos-Villalobos, André F. V. Matias, Ethan I. L. Jull, Lisa Tran et autres

Anisotropic rodlike particles form liquid crystalline phases with varying degrees of orientational and translational order. When confined geometrically, these phases can give rise to topological defects, which can be selected and controlled by tuning how the rods align near boundaries, known as …

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The role of FFF process parameters on impact strength: a review

Koen Winters, Ethan I. L. Jull

Fused filament fabrication (FFF) is a widely used additive manufacturing technique which, via plastic filament extrusion, fabricates parts via layer-by-layer build-up. Mechanical properties of parts can be optimised by control of print parameters. Impact strength is an important property which relates to …

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Dataset associated with 'Insight Into the Compositional-Dependent Transition from Auxetic Nematic to Frustrated Smectic in Liquid Crystal Elastomers'

Helen Frances Gleeson, Emily J. Cooper, Stuart R. Berrow, K. S. Margaryan et autres

This dataset contains the density, X-ray scattering, and mechanical measurements of a series of acrylate Liquid Crystal Elastomers. The mechanical measurements include the Young's moduli, Poisson's Ratio, and the auxetic threshold.

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Robust prognostics of impacted composite structures using an adaptive hidden semi-Markov model

Mariana Salinas-Camus, Georgios Galanopoulos, Lucas Amaral, Ethan I. L. Jull et autres

Prognostics and health management (PHM) is becoming increasingly important as engineering structures and systems grow more complex. Many of these systems lack accurate physical models to describe their degradation, especially in unpredictable scenarios. To meet safety regulations, robust prognostic models are needed …

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Robust Prognostics for Composite Structures Facing Unforeseen Impacts

Mariana Salinas-Camus, Ethan I. L. Jull, Lucas Amaral, Nick Eleftheroglou

Prognostics and Health Management (PHM) has gained prominence in recent years due to the increasing complexity of engineering systems and structures.Many of these systems lack comprehensive physical models that accurately describe their degradation processes, and there is limited engineering experience regarding their …

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Impact of adhesive layer properties on ceramic multi-layered ballistic armour systems: A review

Ethan I. L. Jull, R. Dekker, Lucas Fonseca Amaral

The role of the adhesive layer in the ballistic performance of ceramic multi-layer armour system is complex and multi-faceted, often with trade-offs between single- and multi-hit performance. However, research focused on untangling the underlying impact of varying adhesive cohesive or adhesion properties …

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Curvature-directed anchoring and defect structure of colloidal smectic liquid crystals in confinement

Ethan I. L. Jull, Gerardo Campos-Villalobos, Qianjing Tang, Marjolein Dijkstra et autres

Rod-like objects at high packing fractions can exhibit liquid crystalline ordering. By controlling how the rods align near a boundary, i.e. the anchoring, the defects of a liquid crystal can be selected and tuned. For smectic phases, the rods break rotational and …

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Flexible, Photonic Films of Surfactant‐Functionalized Cellulose Nanocrystals for Pressure and Humidity Sensing

Diogo V. Saraiva, Steven N. Remiëns, Ethan I. L. Jull, Ivo R. Vermaire et autres

Cellulose Nanocrystals Plant-derived, cellulose nanocrystals (CNCs) are abundant nanoparticles that can helically stack and form structural color (background polarized image, inset electron micrograph). In article number 2400104, Lisa Tran and co-workers show through surface-modification with a single surfactant, CNCs can be dispersed …

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Flexible, Photonic Films of Surfactant‐Functionalized Cellulose Nanocrystals for Pressure and Humidity Sensing

Diogo V. Saraiva, Steven N. Remiëns, Ethan I. L. Jull, Ivo R. Vermaire et autres

Most paints contain pigments that absorb light and fade over time. A robust alternative can be found in nature, where structural coloration arises from the interference of light with submicron features. Plant‐derived, cellulose nanocrystals (CNCs) mimic these features by self‐assembling into a …

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Controlling the Optical Properties of Transparent Auxetic Liquid Crystal Elastomers

Emily J. Cooper, Matthew Reynolds, Thomas Raistrick, Stuart R. Berrow et autres

High Resolution Image Download MS PowerPoint Slide Determining the tunability of the optical coefficients, order parameter, and transition temperatures in optically transparent auxetic liquid crystal elastomers (LCEs) is vital for applications, including impact-resistant glass laminates. Here, we report measurements of the refractive …

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Flexible, photonic films of surfactant-functionalized cellulose nanocrystals for pressure and humidity sensing

Diogo V. Saraiva, Steven N. Remiëns, Ethan I. L. Jull, Ivo R. Vermaire et autres

Most paints contain pigments that absorb light and fade over time. A robust alternative can be found in nature, where structural coloration arises from the interference of light with submicron features. Plant-derived, cellulose nanocrystals (CNCs) mimic these features by self-assembling into a …