Deposition of zwitterionic polymer brushes in a dense gas medium

Puniredd, Sreenivasa Reddy; Jayaraman, Sundaramurthy; Gandhimathi, Chinnasamy; Ramakrishna, Seeram; Venugopal, Jayarama Reddy; Yeo, Tin Wei; Guo, Shifeng; Quintana, Robert; Jańczewski, Dominik; Srinivasan, M.P.

doi:10.1016/j.jcis.2015.01.070

Cited by 8 publications

(8 citation statements)

References 41 publications

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“…Lately, surface modification has been used to obtain materials with desired wettability. A surface grafted with zwitterionic functional groups exhibits the highly hydrophilic feature and has sparked interest − owing to its antifouling properties that resist the nonspecific protein adsorption and adhesion of bacteria. − Therefore, such zwitterionic surfaces have been explored for various applications in the field of biomedical sciences. − For example, materials used for bioimplants suffer problems such as bioadhesion, tissue inflammation, and infection. Therefore, sulfobetaine-based zwitterionic surfaces have been employed for making the implants biocompatible. − In addition, these antifouling zwitterionic surfaces also demonstrate technological applications such as protein separation, self-cleaning, antifog, and oil–water separation. ,− …”

Section: Introductionmentioning

confidence: 99%

Self-Propulsion and Shape Restoration of Aqueous Drops on Sulfobetaine Silane Surfaces

Singh

Sheng

et al. 2017

Langmuir

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The motion of droplets on typical surfaces is generally halted by contact line pinning associated with contact angle hysteresis. In this study, it was shown that, on a zwitterionic sulfobetaine silane (SBSi)-coated surface, aqueous drops with appropriate solutes can demonstrate hysteresis-free behavior, whereas a pure water drop shows spontaneous spreading. By adding solutes such as polyethylene glycol, 2(2-butoxy ethoxy) ethanol, or sodium n-dodecyl sulfate, an aqueous drop with a small contact angle (disappearance of spontaneous spreading) was formed on SBSi surfaces. The initial drop shape was readily relaxed back to a circular shape (hysteresis-free behavior), even upon severe disturbances. Moreover, it was interesting to observe the self-propulsion of such a drop on horizontal SBSi surfaces in the absence of externally provided stimuli. The self-propelled drop tends to follow a random trajectory, and the continuous movement can last for at least 10 min. This self-propelled random motion can be attributed to the combined effects of the hysteresis-free surface and the Marangoni stress. The former comes from the total wetting property of the surface, while the latter originates from surface tension gradient due to fluctuating evaporation rates along the drop border.

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Section: Introductionmentioning

confidence: 99%

Self-Propulsion and Shape Restoration of Aqueous Drops on Sulfobetaine Silane Surfaces

Singh

Sheng

et al. 2017

Langmuir

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“…The contents were 2.96 and 3.88%, respectively. This indicated the PSBMA was successfully grafted onto the surface of the PVA‐ co ‐PE nanofiber membrane . The grafting degree of the functionalized PVA‐ co ‐PE nanofiber membranes in each step were calculated and are presented in Table .…”

Section: Resultsmentioning

confidence: 98%

Zwitterionic‐polymer‐functionalized poly(vinyl alcohol‐co‐ethylene) nanofiber membrane for resistance to the adsorption of bacteria and protein

Wang

Lü

Luo

et al. 2016

J of Applied Polymer Sci

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A zwitterionic poly(vinyl alcohol‐co‐ethylene) (PVA‐co‐PE) nanofiber membrane for resistance to bacteria and protein adsorption was fabricated by the atom transfer radical polymerization of sulfobetaine methacrylate (SBMA). The PVA‐co‐PE nanofiber membrane was first surface‐activated by α‐bromoisobutyryl bromide, and then, zwitterionic SBMA was initiated to polymerize onto the surface of nanofiber membrane. The chemical structures of the functionalized PVA‐co‐PE nanofiber membranes were confirmed by attenuated total reflectance–Fourier transform infrared spectroscopy and X‐ray photoelectron spectroscopy. The morphologies of the PVA‐co‐PE nanofiber membranes were characterized by scanning electron microscopy. The results show that the poly(sulfobetaine methacrylate) (PSBMA) was successfully grafted onto the PVA‐co‐PE nanofiber membrane, and the surface of the nanofiber membrane was more hydrophilic than that of the pristine membrane. Furthermore, the antibacterial adsorption properties and resistance to protein adsorption of the surface were investigated. This indicated that the PSBMA‐functionalized surface possessed good antibacterial adsorption activity and resistance to nonspecific protein adsorption. Therefore, this study afforded a convenient and promising method for preparing a new kind of soft and nonwoven dressing material with antibacterial adsorption and antifouling properties that has potential use in the medical field. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 44169.

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“…The most popular techniques for surface functionalization, which have been used in various applications, include surface passivation, sensors, 1,2 micro/nanoelectronics, 3,4 and environmental 5 and energy 6 applications in the form of dendrimers, 7 polymer brushes, 8 self-assembled monolayers (SAMs), and layer-by-layer films (LBL). 8 Because they have more complicated structures, macromolecules such as cyclodextrins, calixarenes, and certain ionophores can be functionalized to perform supramolecular surface chemistry. These macromolecules often have bucketlike structures and are able to interact with molecules that are immobilized noncovalently.…”

Section: ■ Introductionmentioning

confidence: 99%

“…By enabling specific control over the properties (physical and chemical) of surfaces, the surface immobilization of molecules has provided a new route to the science of surface and interface chemistry, advancing current technologies and creating new opportunities for potential applications. The most popular techniques for surface functionalization, which have been used in various applications, include surface passivation, sensors, , micro/nanoelectronics, , and environmental and energy applications in the form of dendrimers, polymer brushes, self-assembled monolayers (SAMs), and layer-by-layer films (LBL) . Because they have more complicated structures, macromolecules such as cyclodextrins, calixarenes, and certain ionophores can be functionalized to perform supramolecular surface chemistry.…”

Section: Introductionmentioning

confidence: 99%

Universal Single-Step Approach to the Immobilization of Cyclodextrins in a Supercritical Medium for Capturing Drug, Dye, and Metal Nanoclusters

Bhartia

Das

Jayaraman³

et al. 2023

Langmuir

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By utilizing nanoreactor-like structures, the immobilization of macromolecules such as calixarenes and cyclodextrins (CD) with bucket-like structures provides new possibilities for engineered surface-molecule systems. The practical use of any molecular system depends on the availability of a universal procedure for immobilizing molecules with torus-like structures on various surfaces while maintaining identical operating parameters. There are currently several steps, including toxic solvent-based approaches using modified β-CD to covalently attach to surfaces with multistep reactions. However, the existing multistep process results in molecular orientation, restricts the accessibility of the hydrophobic barrel of β-CD’s for practical use, and is effectively unable to use the surfaces immobilized with β-CD for a variety of applications. In this study, it was demonstrated that β-CD attached to the oxide-based semiconductor and metal surfaces through a condensation reaction between the hydroxyl-terminated oxide-based semiconductor/metal oxide and β-CD in supercritical carbon dioxide (SCCO2) as a medium. The primary benefit of SCCO2-assisted grafting of unmodified β-CD on various oxide-based metal and semiconductor surfaces is that it is a simple, efficient, one-step process and that it is ligand-free, scalable, substrate-independent, and uses minimal energy. Various physical microscopy and chemical spectroscopic methods were used to analyze the grafted β-CD oligomers. The application of the grafted β-CD films was demonstrated by the immobilization of rhodamine B (RhB), a dye, and dopamine, a drug. The in situ nucleation and growth of silver nanoclusters (AgNCs) in the molecular systems were studied for antibacterial and tribological properties by utilizing the guest–host interaction ability of β-CD.

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Deposition of zwitterionic polymer brushes in a dense gas medium

Cited by 8 publications

References 41 publications

Self-Propulsion and Shape Restoration of Aqueous Drops on Sulfobetaine Silane Surfaces

Self-Propulsion and Shape Restoration of Aqueous Drops on Sulfobetaine Silane Surfaces

Zwitterionic‐polymer‐functionalized poly(vinyl alcohol‐co‐ethylene) nanofiber membrane for resistance to the adsorption of bacteria and protein

Universal Single-Step Approach to the Immobilization of Cyclodextrins in a Supercritical Medium for Capturing Drug, Dye, and Metal Nanoclusters

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