Evaporation-driven self-assembly of binary and ternary colloidal polymer nanocomposites for abrasion resistant applications

Tinkler, James D.; Scacchi, Alberto; Kothari, Harsh R.; Tulliver, Hanna; Argaiz, Maialen; Archer, Andrew J.; Martín-Fabiani, Ignacio

doi:10.1016/j.jcis.2020.08.001

Cited by 17 publications

(29 citation statements)

References 57 publications

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“…Multi-layered films and coatings have numerous applications, ranging from pharmaceuticals 1,2 to photovoltaic devices 3 and automobiles. 4 Stratified microstructures with designed surfaces 5 are known to tailor coating properties, including the abrasion resistance, 6,7 wetting, 8,9 antifouling, 10 corrosion resistance, 11 and even flame retardancy. 12 Self-stratifying coatings 13 offer greater sustainability through efficient use of resources: materials, time and energy.…”

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confidence: 99%

“…Most of the reports in the literature have investigated colloidal binary systems of large and small particles. However, there have been some experiments 6 and simulations 28 considering stratification in ternary systems consisting of colloids of three different sizes and also experiments on polydisperse systems. 29 Elsewhere, mixtures of colloids with polymers in dilute solutions have been investigated in experiments, 19 simulations, 18,20 and theory 30 with a Pe defined for the coiled chains.…”

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confidence: 99%

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Suppression of self-stratification in colloidal mixtures with high Péclet numbers

Schulz

Brinkhuis²,

Crean

et al. 2022

Soft Matter

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confidence: 99%

mentioning

confidence: 99%

Suppression of self-stratification in colloidal mixtures with high Péclet numbers

Schulz

Brinkhuis²,

Crean

et al. 2022

Soft Matter

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“…These latex/CTAB dispersions were vortexed for 15 s, sonicated for 1 min, and vortexed again for 1 min to ensure adequate mixing. The silica dispersion was then added to obtain a silica volume fraction (in the initial wet films) of 0.013 as per our previous experiments 7 (with a latex volume fraction of 0.062). The resulting silica volume fraction of the dried films was 0.17.…”

Section: Methodsmentioning

confidence: 99%

“… 1 These dispersions are known as latexes and are commonly used in paints, 2 inks, 3 adhesives, 4 and cosmetics. 5 Dual-layered films, which can provide specific surface properties, are highly desirable for applications such as antibacterial coatings, 6 abrasion resistant paints, 7 antireflective coatings, 8 and inkjet printing. 9 In recent years, it has been shown that size segregation during drying of bimodal or polydisperse colloidal mixtures offers a promising method to produce stratified films containing two layers through a single-step process, 10 reducing production time and cost compared with conventional multistep deposition methods.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Particle Interactions on the Assembly of Drying Colloidal Mixtures

et al. 2022

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The effects of particle interactions on the size segregation and assembly of colloidal mixtures during drying were investigated. A cationic surfactant was added to a binary latex/silica colloidal dispersion that has been shown to self-stratify upon drying at room temperature. Atomic force microscopy was used to show that the change in particle interactions due to the presence of surfactants reduced the degree of stratification and, in some cases, suppressed the effect altogether. Colloidal dispersions containing higher surfactant concentrations can undergo a complete morphology change, resulting instead in the formation of armored particles consisting of latex particles coated with smaller silica nanoparticles. To further prove that armored particles are produced and that stratification is suppressed, cross-sectional images were produced with energy-dispersive X-ray spectroscopy and confocal fluorescence microscopy. The growth of armored particles was also measured using dynamic light scattering. To complement this research, Brownian dynamics simulations were used to model the drying. By tuning the particle interactions to make them more attractive, the simulations showed the presence of armored particles, and the size segregation process was hindered. The prevention of segregation also results in enhanced transparency of the colloidal films. Overall, this research proves that there is a link between particle interactions and size segregation in drying colloidal blends and provides a valuable tool to control the assembly of different film architectures using an extremely simple method.

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Carbon‐based conductive rubber composite for 3D printed flexible strain sensors

Srimongkol

Wiroonpochit

Utra

et al. 2022

Polymers for Advanced Techs

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Polymeric‐based flexible electronic devices are in high demand due to its wide range of applications. Natural rubber (NR) shows a great potential as matrix phase for flexible conductive polymer composites with its high elasticity and fatigue resistance. In this study, a new 3D printable conductive NR (CNR) composite was developed for strain sensor applications. Different contents of conductive carbon black (CCB) were mixed with NR latex to investigate the effect of the filler content on electrical and mechanical properties of the composites. The best‐known CNR composite with the CCB content of 12 phr was selected in order to produce the feedstock for the stereolithography process (SLA). The morphological, electrical, and mechanical properties of cast and 3D‐printed samples were investigated and compared. Although the 3D‐printed CNR sample had slightly lower conductivity than the cast one, it possessed comparable tensile strength and elongation at break, with values of 12.4 MPa and 703%, respectively. In addition, electrical responses of the CNR samples were investigated to demonstrate the electromechanical property of the material as a strain sensor. The 3D‐printed CNR sample exhibited the highest electromechanical sensitivity with a gauge factor (GF) of 361.4 (ε = 210%–300%) and showed good repeatability for 500 cycles. In conclusion, the development of this 3D printable functional material with great sensing capability will pave the way for innovative designs of personalized sensing textiles and other smart wearable devices.

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Evaporation-driven self-assembly of binary and ternary colloidal polymer nanocomposites for abrasion resistant applications

Cited by 17 publications

References 57 publications

Suppression of self-stratification in colloidal mixtures with high Péclet numbers

Suppression of self-stratification in colloidal mixtures with high Péclet numbers

Effect of Particle Interactions on the Assembly of Drying Colloidal Mixtures

Carbon‐based conductive rubber composite for 3D printed flexible strain sensors

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