Very Low Surface Energy (<11 dyn cm-1) Heterophase Polymeric Materials for Membrane Separations: An Integrated Polymer Chemistry/Engineering Approach and The Influence of Backpulsing on Fouling Properties of Novel Nanofiltration Membranes for Wastewater Remediation.

1998 ◽  
Author(s):  
Benny D. Freeman ◽  
Joseph M. DeSimone
Keyword(s):  
Surface Energy ◽  
Polymeric Materials ◽  
Polymer Chemistry ◽  
Membrane Separations ◽  
Wastewater Remediation ◽  
Nanofiltration Membranes ◽  
Engineering Approach ◽  
Low Surface Energy

Interfacial Characterization of Multiple Layer Coatings on Thermoplastic Olefins (TPO)

2007 ◽  
Vol 1049 ◽  
Author(s):  
Aaron M Forster ◽  
Chris A. Michaels ◽  
Justin Lucas ◽  
Lipiin Sung
Keyword(s):  
Surface Energy ◽  
Polymeric Materials ◽  
Raman Microscopy ◽  
Confocal Raman Microscopy ◽  
Instrumented Indentation ◽  
Clear Coat ◽  
Low Surface Energy ◽  
Automotive Parts ◽  
Thermoplastic Olefins ◽  
Confocal Raman

AbstractThermoplastic olefins (TPO) have made significant inroads as polymeric materials for interior and exterior automotive parts. Spray applied chlorinated polyolefins (CPO) are often used to improve paint adhesion to the low surface energy TPO substrates. The penetration of the CPO into the substrate is difficult to quantify, but is critical to achieving a good paint/TPO bond. The interphase between each layer in a coated TPO coupon was investigated using a combination of instrumented indentation and confocal Raman microscopy. The degree of CPO interpenetration was Thermoplastic olefins (TPO) have made significant inroads as polymeric materials for interior and exterior automotive parts. Spray applied chlorinated polyolefins (CPO) are often used to improve paint adhesion to the low surface energy TPO substrates. The penetration of the CPO into the substrate is difficult to quantify, but is critical to achieving a good paint/TPO bond. The interphase between each layer in a coated TPO coupon was investigated using a combination of instrumented indentation and confocal Raman microscopy. The degree of CPO interpenetration was altered by using three different CPOs exposed to two different manufacturing methods for the same TPO and base/clear coat system. It was found that the interfaces, CPO/base coat or CPO/TPO, were chemically and mechanically sharp at the 1 μm lateral resolution of both techniques. A gradient in the modulus through the thickness of the clear coat was observed using instrumented indentation.

Cytocompatibility of Carbon Nanofiber Materials for Neural Applications

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.

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

Polymer ◽  
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

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

AIP Advances ◽  
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

scholarly journals Low Surface Energy Polymeric Films from Novel Fluorinated Blocked Isocyanates

2004 ◽  
Vol 37 (2) ◽  
pp. 408-413 ◽  
Author(s):  
L. van Ravenstein ◽  
W. Ming ◽  
R. D. van de Grampel ◽  
R. van der Linde ◽  
G. de With ◽  
...  
Keyword(s):  
Surface Energy ◽  
Polymeric Films ◽  
Low Surface Energy

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

Polymers ◽  
2018 ◽  
Vol 10 (9) ◽  
pp. 979 ◽  
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.

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

2015 ◽  
Vol 3 (38) ◽  
pp. 19299-19303 ◽  
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.

Improvement of anti-icing properties of low surface energy coatings by introducing phase-change microcapsules

2017 ◽  
Vol 58 (6) ◽  
pp. 973-979 ◽  
Author(s):  
Kongying Zhu ◽  
Xiaohui Li ◽  
Junfeng Su ◽  
Hui Li ◽  
Yunhui Zhao ◽  
...  
Keyword(s):  
Surface Energy ◽  
Phase Change ◽  
Low Surface Energy
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