Surface properties and liquid crystal alignment behavior of poly(2-hydroxyethyl methacrylate) derivatives with alkyl ester side chains

Sohn, Eun‐Ho; Kim, Sung Hyun; Lee, Mongryong; Lee, Jong-Chan; Song, Kigook

doi:10.1016/j.jcis.2011.04.070

Cited by 12 publications

(5 citation statements)

References 61 publications

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“…In agreement with ref for a range of brush properties and contact line speeds, the advancing contact line exhibits a stick–slip motion. Such behavior is also mentioned in ref and described for other soft or otherwise deformable substrates. ,,,,,− This includes layers of thermoresponsive PNIPAM and related copolymers . For such systems, it might be interesting to elucidate the respective role of swelling and phase transition in the stick–slip behavior employing an amended gradient dynamics model.…”

Section: Discussionmentioning

confidence: 90%

Drops on Polymer Brushes: Advances in Thin-Film Modeling of Adaptive Substrates

Hartmann,

Diekmann,

Greve

et al. 2024

Langmuir

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We briefly review recent advances in the hydrodynamic modeling of the dynamics of droplets on adaptive substrates, in particular, solids that are covered by polymer brushes. Thereby, the focus is on long-wave and full-curvature variants of mesoscopic hydrodynamic models in gradient dynamics form. After introducing the approach for films/drops of nonvolatile simple liquids on a rigid smooth solid substrate, it is first expanded to an arbitrary number of coupled degrees of freedom before considering the specific case of drops of volatile liquids on brushcovered solids. After presenting the model, its usage is illustrated by briefly considering the natural and forced spreading of drops of nonvolatile liquids on a horizontal brush-covered substrate, stick− slip motion of advancing contact lines as well as drops sliding down a brush-covered incline. Finally, volatile liquids are also considered.

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Section: Discussionmentioning

confidence: 90%

Drops on Polymer Brushes: Advances in Thin-Film Modeling of Adaptive Substrates

Hartmann,

Diekmann,

Greve

et al. 2024

Langmuir

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“…Even though the θ adv of water on the P(VDF-CTFE) film surface (103.2°) was slightly larger than that on the P(VDF-CTFE)- g -TFEMA (101.4°) surface, its θ hys (≈ 54°) was considerably higher than that of the other samples; all the P(VDF-CTFE)- g -PFMMA samples showed similar θ hys values in the ranges of 19–21°, 13–14°, and 9–11° for water, DIM, and EG, respectively. The θ hys values for DIM and EG on P(VDF-CTFE) could not be obtained because of stick–slip behavior − and instability of the film surface, respectively.…”

Section: Resultsmentioning

confidence: 99%

Fluorinated Methacrylate-Grafted P(VDF-CTFE) and Albumin Layers for Reducing Fibrinogen Adsorption

Han

Heo

Park

et al. 2019

ACS Appl. Polym. Mater.

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The use of extracorporeal devices is growing rapidly for the treatment of the fatal cardiovascular and kidney failures. Even though there has been much clinical progress in the past few decades to reduce fatality, these improvements are insufficiently supported by the development in medical devices. Particularly, it is imperative that the blood-contacting medical devices have nonprotein-fouling materials that can efficiently prevent blood coagulation. Herein, perfluoromethyl methacrylates (PFMMAs) with short perfluorinated side groups (−CF3, −CF2CF3, and −(CF2)2CF3) are strategically grafted into poly(vinylidene fluoride-co-chlorotrifluoroethylene) (PVDF-CTFE) to reduce protein adhesion. On the basis of the type of the perfluorinated side group, the surface energies of the graft copolymers are controlled in the range of 11.1–18.7 mN m–1. The graft copolymer with the lowest surface energy showed the lowest protein adsorption for both albumin and fibrinogen, as compared with the other graft copolymers and PMMA. Interestingly, albumin pretreatment of the surface remarkably reduces the amount of adsorbed fibrinogen from 2069 ng cm–2 (without albumin pretreatment) to 5.6 ng cm–2. This indicates that the graft copolymer is practically useful for various blood-contacting devices because fibrinogen is the key glycoprotein that induces blood coagulation.

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“…5 The OH groups of PHEMA were reacted with different feed ratios of octadecanoyl chloride in a solvent mixture of pyridine and THF in order to synthesize PHEMA17 copolymers ( Figure 1) with different degrees of alkyl side chain substitution (37%, 70%, and 92%). Fourier transform infrared (FTIR) spectra of these three PHEMA17 copolymers (PC-37, PC-70, and PC-92) are shown in Figure 2 and were obtained using a Bruker Alpha FTIR spectrometer in a nitrogen environment.…”

Section: Resultsmentioning

confidence: 99%

“…[1][2][3][4][5] In many comb-like polymers, the long side chains tend to crystallize in an interdigitated structure and lie normal to the main chain backbone. The lengths of the side chains of comblike polymers can also be modified in order to obtain different molecular structures and physical properties within the same polymer system.…”

Section: Introductionmentioning

confidence: 99%