Static and Dynamic Gradient Based Directional Transportation of Neutral Molecules in Swollen Polymer Films

Ali, M. Ajmal; Volmert, Brett; Evans, Christopher M.

doi:10.1002/anie.202206061

Cited by 3 publications

(1 citation statement)

References 37 publications

(16 reference statements)

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“…When making a salt layer on some surface, the water first dissolves that salt that bound to surface. So it expected to give some hydrophilic properties (Ali et al, 2022). Immediately anodized titanium, the hydrophilic state high at the TiO2 surface.…”

Section: Discussionmentioning

confidence: 99%

Comparison of Surface Processes Applied to Preserve the Hydrophilic Property of Implants

Öztoprak¹,

Öztoprak²

2022

Proceedings of the 9th International Conference on Advanced Materials and Systems

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Today, studies are carried out on many surface modification techniques to improve the surface properties of dental implants. The common goal of all these studies is to increase cell retention on the implant surface and to perform implantation with high biomechanical properties and biocompatibility. Anodized implants are hydrophilic due to their surface properties. The hydrophilic nature of the implant surface has been found to be beneficial for osseointegration in many studies. After the implant surface anodization process, the hydrophilicity on the surface is at the highest level and the hydrophilic feature on the surface decreases as it comes into contact with air. Many commercially hydrophilic implants lose their hydrophilic properties early in their shelf life. Researchers are in search of longer preservation of hydrophilic properties in implants. In our study, we aimed to preserve the hydrophilic feature on the titanium surface for a longer time by forming a thin layer of NaCl on the surface by cleaning the Ti Gr4 1cm3 plate pieces immediately after the micro-arc oxidation process and dipping them into isotonic NaCl solution. The study was done in 5 groups. In the first group, titanium was cleaned after the micro-arc oxidation (MAO) process and the water contact angle (WCA) on the surface was measured. The remaining 4 groups were divided as MAO applied and 15 days passed, MAO + NaCl applied and 15 days passed, MAO applied and 30 days passed, MAO + NaCl applied and 30 days passed. Water contact angle measurements were made for all groups and their hydrophilic properties were compared. In our experiment, the highest WCA was found in the parts measured immediately after anodization in the first group. Titanium surfaces coated with NaCl showed 14% lower WCA after anodization compared to untreated titanium after 15 days. In the 30-day groups, 20% lower WCA was found in the titanium treated with NaCl compared to the untreated ones. NaCl treatment on the hydrophilic surface of titanium helped to preserve its hydrophilic property over time. In this study, it was observed that the hydrophilic properties on the surface of the implants that were treated with NaCl for the first time on hydrophilic titanium were preserved for a longer period of time. We propose to increase the osseointegration quality by performing such applications on hydrophilic implants.

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Section: Discussionmentioning

confidence: 99%

Comparison of Surface Processes Applied to Preserve the Hydrophilic Property of Implants

Öztoprak¹,

Öztoprak²

2022

Proceedings of the 9th International Conference on Advanced Materials and Systems

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Static and Dynamic Gradient Based Directional Transportation of Neutral Molecules in Swollen Polymer Films

2022

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Materials which selectively transport molecules offer powerful opportunities for concentrating and separating chemical agents. Here, utilizing static and dynamic chemical gradients, transport of molecules within swollen crosslinked polymers is demonstrated. Using an ≈200 μm static hydroxyl to hexyl gradient, the neutral ambipolar nerve agent surrogate diethyl (cyanomethyl)phosphonate (DECP) is directionally transported and concentrated 60‐fold within 4 hours. To accelerate transport kinetics, a dynamic gradient (a “travelling wave”) is utilized. Here, the non‐polar dye pyrene was transported. The dynamic gradient is generated by an ion exchange process triggered by the localized introduction of an aqueous NaCl solution, which converts the gel from hydrophobic to hydrophilic. As the hydrophilic region expands, associated water enters the gel, and pyrene is pushed ahead of the expansion front. The dynamic gradient provides about 10‐fold faster transport kinetics than the static gradient.

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Temperature-responsive peristome-structured smart surface for the unidirectional controllable motion of large droplets

Song,

Yang,

Zhang

et al. 2023

Microsyst Nanoeng

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The manipulation of fast, unidirectional motion for large droplets shows important applications in the fields of fog collection and biochemical reactions. However, driving large droplets (>5 μL) to move directionally and quickly remains challenging due to the nonnegligible volume force. Herein, we fabricated a scalable, bionic peristome substrate with a microcavity width of 180 μm using a 3D printing method, which could unidirectionally drive a large water droplet (~8 μL) at a speed reaching 12.5 mm/s by temperature-responsive wettability. The substrate surface was grafted with PNIPAAm, which could reversibly change its wettability in response to temperature, thereby enabling a temperature-responsive smart surface that could regulate droplet movement in real-time by changing the temperature. A series of temperature-responsive smart patterns were designed to induce water transport along specific paths to further realize controllable droplet motion with the antibacterial treatment of predesignated areas. The ability to achieve temperature-responsive unidirectional motion and dynamic control of droplet movement could allow programmable fluidic biosensors and precision medical devices.

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Static and Dynamic Gradient Based Directional Transportation of Neutral Molecules in Swollen Polymer Films

Cited by 3 publications

References 37 publications

Comparison of Surface Processes Applied to Preserve the Hydrophilic Property of Implants

Comparison of Surface Processes Applied to Preserve the Hydrophilic Property of Implants

Static and Dynamic Gradient Based Directional Transportation of Neutral Molecules in Swollen Polymer Films

Temperature-responsive peristome-structured smart surface for the unidirectional controllable motion of large droplets

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