Low Surface Energy Polymeric Films from Novel Fluorinated Blocked Isocyanates

Materials with bioinspired superhydrophobic properties are highly desirable for many potential applications. Here, nine novel monomers derived from indole are synthesized to obtain these properties by electropolymerization. These monomers differ by the length (C4F9, C6F13 and C8F17) and the position (4-, 5- and 6-position of indole) of the perfluorinated substituent. Polymeric films were obtained with C4F9 and C6F13 chains and differences in the surface morphology depend especially on the substituent position. The polyindoles exhibited hydrophobic and superhydrophobic properties even with a very low roughness. The best results are obtained with PIndole-6-F 6 for which superhydrophobic and highly oleophobic properties are obtained due to the presence of spherical nanoparticles and low surface energy compounds.

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Cytocompatibility of Carbon Nanofiber Materials for Neural Applications

MRS Proceedings ◽

10.1557/proc-774-o7.35 ◽

2003 ◽

Vol 774 ◽

Author(s):

Janice L. McKenzie ◽

Michael C. Waid ◽

Riyi Shi ◽

Thomas J. Webster

Keyword(s):

Carbon Fiber ◽

Surface Energy ◽

Carbon Nanofibers ◽

Carbon Fibers ◽

Carbon Nanofiber ◽

Fiber Composite ◽

Scar Tissue ◽

Pc 12 Cells ◽

Low Surface Energy ◽

Poly Carbonate

AbstractSince the cytocompatibility of carbon nanofibers with respect to neural applications remains largely uninvestigated, the objective of the present in vitro study was to determine cytocompatibility properties of formulations containing carbon nanofibers. Carbon fiber substrates were prepared from four different types of carbon fibers, two with nanoscale diameters (nanophase, or less than or equal to 100 nm) and two with conventional diameters (or greater than 200 nm). Within these two categories, both a high and a low surface energy fiber were investigated and tested. Astrocytes (glial scar tissue-forming cells) and pheochromocytoma cells (PC-12; neuronal-like cells) were seeded separately onto the substrates. Results provided the first evidence that astrocytes preferentially adhered on the carbon fiber that had the largest diameter and the lowest surface energy. PC-12 cells exhibited the most neurites on the carbon fiber with nanodimensions and low surface energy. These results may indicate that PC-12 cells prefer nanoscale carbon fibers while astrocytes prefer conventional scale fibers. A composite was formed from poly-carbonate urethane and the 60 nm carbon fiber. Composite substrates were thus formed using different weight percentages of this fiber in the polymer matrix. Increased astrocyte adherence and PC-12 neurite density corresponded to decreasing amounts of the carbon nanofibers in the poly-carbonate urethane matrices. Controlling carbon fiber diameter may be an approach for increasing implant contact with neurons and decreasing scar tissue formation.

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Corrigendum to “Fabrication superhydrophobic composite membranes with hierarchical geometries and low-surface-energy modifications” [Polymer 211 (2020) 123097]

Polymer ◽

10.1016/j.polymer.2021.123481 ◽

2021 ◽

Vol 217 ◽

pp. 123481

Author(s):

Zhanhui Gan ◽

Deyu Kong ◽

Qianqian Yu ◽

Yifan Jia ◽

Xue-Hui Dong ◽

...

Keyword(s):

Surface Energy ◽

Composite Membranes ◽

Low Surface Energy

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Automated pick-and-place of single nanoparticle using electrically controlled low-surface energy nanotweezer

AIP Advances ◽

10.1063/5.0041145 ◽

2021 ◽

Vol 11 (3) ◽

pp. 035219

Author(s):

Ya-Kun Lyu ◽

Zuo-Tao Ji ◽

Tao He ◽

Zhenda Lu ◽

Weihua Zhang

Keyword(s):

Surface Energy ◽

Low Surface Energy ◽

Single Nanoparticle ◽

Pick And Place

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Development of a Directly Patterned Low-Surface-Energy Polymer Brush in Supercritical Carbon Dioxide

ACS Applied Materials & Interfaces ◽

10.1021/am9003733 ◽

2009 ◽

Vol 1 (9) ◽

pp. 2013-2020 ◽

Cited By ~ 9

Author(s):

Abhinav Rastogi ◽

Marvin Y. Paik ◽

Christopher K. Ober

Keyword(s):

Carbon Dioxide ◽

Supercritical Carbon Dioxide ◽

Surface Energy ◽

Polymer Brush ◽

Low Surface Energy ◽

Supercritical Carbon

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Low Surface Energy Polyurethane Coatings Based on Acrylic Copolymer and Polyisocyanate Modified with an Organosilicon Block Copolymer

Russian Journal of Applied Chemistry ◽

10.1134/s107042722105013x ◽

2021 ◽

Vol 94 (5) ◽

pp. 647-655

Author(s):

D. A. Erofeev ◽

L. N. Mashlyakovskii ◽

E. V. Khomko ◽

G. E. Litosov

Keyword(s):

Block Copolymer ◽

Surface Energy ◽

Acrylic Copolymer ◽

Polyurethane Coatings ◽

Low Surface Energy

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A Novel Synthetic UV-Curable Fluorinated Siloxane Resin for Low Surface Energy Coating

Polymers ◽

10.3390/polym10090979 ◽

2018 ◽

Vol 10 (9) ◽

pp. 979 ◽

Cited By ~ 3

Author(s):

Chunfang Zhu ◽

Haitao Yang ◽

Hongbo Liang ◽

Zhengyue Wang ◽

Jun Dong ◽

...

Keyword(s):

Surface Energy ◽

Photoelectron Spectroscopy ◽

Contact Angles ◽

Proton Nuclear Magnetic Resonance ◽

Energy Materials ◽

Uv Curable ◽

X Ray ◽

Low Surface Energy ◽

Low Concentrations ◽

Siloxane Polymers

Low surface energy materials have attracted much attention due to their properties and various applications. In this work, we synthesized and characterized a series of ultraviolet (UV)-curable fluorinated siloxane polymers with various fluorinated acrylates—hexafluorobutyl acrylate, dodecafluoroheptyl acrylate, and trifluorooctyl methacrylate—grafted onto a hydrogen-containing poly(dimethylsiloxane) backbone. The structures of the fluorinated siloxane polymers were measured and confirmed by proton nuclear magnetic resonance and Fourier transform infrared spectroscopy. Then the polymers were used as surface modifiers of UV-curable commercial polyurethane (DR-U356) at different concentrations (1, 2, 3, 4, 5, and 10 wt %). Among three formulations of these fluorinated siloxane polymers modified with DR-U356, hydrophobic states (91°, 92°, and 98°) were obtained at low concentrations (1 wt %). The DR-U356 resin is only in the hydrophilic state at 59.41°. The fluorine and siloxane element contents were investigated by X-ray photoelectron spectroscopy and the results indicated that the fluorinated and siloxane elements were liable to migrate to the surface of resins. The results of the friction recovering assays showed that the recorded contact angles of the series of fluorinated siloxane resins were higher than the original values after the friction-annealing progressing.

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Superhydrophobic polyaniline hollow spheres with mesoporous brain-like convex-fold shell textures

Journal of Materials Chemistry A ◽

10.1039/c5ta05614d ◽

2015 ◽

Vol 3 (38) ◽

pp. 19299-19303 ◽

Cited By ~ 18

Author(s):

Ruixia Yuan ◽

Huaiyuan Wang ◽

Tuo Ji ◽

Liwen Mu ◽

Long Chen ◽

...

Keyword(s):

Surface Energy ◽

Phase Transfer ◽

Hollow Spheres ◽

Perfluorooctanoic Acid ◽

Porous Structures ◽

Low Surface Energy ◽

Transfer Method ◽

Ordered Porous

A novel micelle-mediated phase transfer method is developed to synthesize hollow polyaniline spheres with mesoporous brain-like convex-fold shell textures. High superhydrophobicity is achieved due to the highly ordered porous structures and low surface energy provided by perfluorooctanoic acid.

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