Functional Polymeric Coatings

2016 ◽  
pp. 78-104 ◽  
Author(s):  
Peter Zarras ◽  
Paul A Goodman ◽  
John D Stenger-Smith
Keyword(s):  
Functional Groups ◽  
Analytical Techniques ◽  
Chemical Engineer ◽  
Polymer Coatings ◽  
Polymeric Coatings ◽  
Careful Selection ◽  
Science And Engineering ◽  
Functional Polymer ◽  
Polymer Properties ◽  
Static Coating

Functional polymeric coatings comprise a diverse array of organic/inorganic functional groups, properties, and applications. This chapter attempts to provide a comprehensive review on the science and engineering of functional polymer coatings for both the novice and experienced chemist/chemical engineer. Functional polymer coatings are coatings that are designed through careful selection of organic/inorganic functional groups and controlled synthesis on the substrate's surface. The design leads to changes in the surface properties (e.g., adhesion, wettability, corrosion resistance, wear resistance, anti-fouling, non-stick, and anti-scratch) of a particular substrate (metal, glass, wood, or plastic). Functional polymeric coatings represent the “next generation” of coatings. These coatings dynamically respond to their environment, as opposed to a static coating that is used as a simple barrier, or for decorative purposes. This review is divided into three sections: (1) functionalization of polymers, (2) polymer properties and surface analytical techniques, and (3) applications.

Functional Polymeric Coatings

2017 ◽  
pp. 648-674
Author(s):  
Peter Zarras ◽  
Paul A Goodman ◽  
John D Stenger-Smith
Keyword(s):  
Functional Groups ◽  
Analytical Techniques ◽  
Chemical Engineer ◽  
Polymer Coatings ◽  
Polymeric Coatings ◽  
Careful Selection ◽  
Science And Engineering ◽  
Functional Polymer ◽  
Polymer Properties ◽  
Static Coating

Functional polymeric coatings comprise a diverse array of organic/inorganic functional groups, properties, and applications. This chapter attempts to provide a comprehensive review on the science and engineering of functional polymer coatings for both the novice and experienced chemist/chemical engineer. Functional polymer coatings are coatings that are designed through careful selection of organic/inorganic functional groups and controlled synthesis on the substrate's surface. The design leads to changes in the surface properties (e.g., adhesion, wettability, corrosion resistance, wear resistance, anti-fouling, non-stick, and anti-scratch) of a particular substrate (metal, glass, wood, or plastic). Functional polymeric coatings represent the “next generation” of coatings. These coatings dynamically respond to their environment, as opposed to a static coating that is used as a simple barrier, or for decorative purposes. This review is divided into three sections: (1) functionalization of polymers, (2) polymer properties and surface analytical techniques, and (3) applications.

scholarly journals Physical Properties of Electropolished CoCrMo Alloy Coated with Biodegradable Polymeric Coatings Releasing Heparin after Prolonged Exposure to Artificial Urine

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2551
Author(s):  
Wojciech Kajzer ◽  
Janusz Szewczenko ◽  
Anita Kajzer ◽  
Marcin Basiaga ◽  
Joanna Jaworska ◽  
...  
Keyword(s):  
Physical Properties ◽  
Crevice Corrosion ◽  
Mass Density ◽  
Polymer Coatings ◽  
Metal Substrate ◽  
Reference Level ◽  
Polymeric Coatings ◽  
Initial State ◽  
Cocrmo Alloy ◽  
Artificial Urine

In this study, we aimed to determine the effect of long-term exposure to artificial urine on the physical properties of CoCrMo alloy with biodegradable heparin-releasing polymeric coatings. Variants of polymer coatings of poly(L,L-lactide-ɛ-caprolactone) (P(L,L-L/CL)) and poly(D,L-lactide-ɛ-caprolactone) (P(D,L-L/CL)) constituting the base for heparin-releasing (HEP) polyvinyl alcohol (PVA) coatings were analyzed. The coatings were applied by the dip-coating method. Heparin was used to counteract the incrustation process in the artificial urine. The study included tests of wettability, resistance to pitting and crevice corrosion, determination of the mass density of metal ions penetrating into the artificial urine, and the kinetics of heparin release. In addition, microscopic observations of surface roughness and adhesion to the metal substrate were performed. Electrolytically polished CoCrMo samples (as a reference level) and samples with polymer coatings were used for the tests. The tests were conducted on samples in the initial state and after 30, 60, and 90 days of exposure to artificial urine. The analysis of the test results shows that the polymer coatings contribute by improving the resistance of the metal substrate to pitting and crevice corrosion in the initial state and reducing (as compared with the metal substrate) the mass density of metal ion release into the artificial urine. Moreover, the PVA + HEP coating, regardless of the base polymer coatings used, contributes to a reduction in the incrustation process in the first 30 days of exposure to the artificial urine.

Adhesion and Electrical Insulation of Thin Polymeric Coatings Under Saline Exposure

1987 ◽  
Vol 110 ◽  
Author(s):  
R. N. Leyden ◽  
D. I. Basiulis
Keyword(s):  
Barrier Properties ◽  
Peel Strength ◽  
Polymer Coatings ◽  
Polymeric Coatings ◽  
Adhesive Failure ◽  
Short Term ◽  
Leakage Currents ◽  
Electrical Bias ◽  
Implanted Devices

AbstractA study was made of the adhesion of insulating polymer coatings under long term exposure to electrical bias. Since a common mode of failure in implanted devices is the penetration of water into poorly adhering insulation/conductor interfaces followed by electrolytic degradation, development of processes, primers, and insulators with good adhesion that resist the effects of water were sought. Polyimide coatings were tested for their ion barrier properties by immersion of insulated comb patterns in saline with 9 V D.C. bias between the comb fingers. Leakage currents, measured over three years exposure, increased from several picoamps initially to several nanoamps in surviving specimens. Subsequent studies showed that dramatic improvements in the moisture durability of the adhesion could be obtained using Hitachi's aluminum chelate type primer. Whereas the peel strength of polyimide on unprimed platinum fell more than 90% after several hours of boiling saline exposure, the peel strength of polyimide coatings on primed surfaces remained at over 80% of their initial values. ESCA analysis of the peel interfaces showed that both aluminum oxide and polyimide remain on the substrate after peeling back the polyimide. This suggests a combination of cohesive and adhesive failure at the primer/polyimide interface. The effects of exposure of the polymer/substrate interfaces (edges) to saline and electrochemical stress were examined by patterning circular openings in the polyimide. A 10 V anodic potential was found to damage adhesion to titanium as far as 75 microns away from the edge. Pulsing at 500 Hz, 1 V peak to peak was found to have no measurable effect in the short term.

Porous Polymer Coatings Based on Nitrocellulose

2019 ◽  
Vol 968 ◽  
pp. 68-75
Author(s):  
Valeriy Vyrovoy ◽  
Viacheslav Bachynckyi ◽  
Nadia Antoniuk
Keyword(s):  
Porous Structure ◽  
Cellular Structure ◽  
Polymer Coating ◽  
Experimental Studies ◽  
Polymer Coatings ◽  
Porous Polymer ◽  
Polymeric Coatings ◽  
New Approach ◽  
Porous Coatings

The paper presents the development of optimum structures and the production of polymeric coatings technology which can absorb aggressive substances. The studies of coatings penetrating into the film are presented due to the organization of their capillary-cellular structure by introducing special fillers. A new approach to solve the problem of protecting the environment, people, buildings and structures from the effects of aggressive substances has been proposed. The essence of the method consists in the preventive deposition on the surfaces of construction objects of porous coatings that can irreversibly absorb aggressive substances. Based on theoretical and experimental studies, porous coatings have been developed that are capable of accumulating in their volume aggressive substances, as well as certain principles of providing the coating with the necessary capillary-porous structure. The mechanism of creating a capillary-cellular structure of a polymer coating based on nitrocellulose are substantiated.

scholarly journals Synthesis, Characterization and Mechanical Properties of Nanocomposites Based on Novel Carbon Nanowires and Polystyrene

2020 ◽  
Vol 10 (17) ◽  
pp. 5737
Author(s):  
Vasilis Kostas ◽  
Maria Baikousi ◽  
Nektaria-Marianthi Barkoula ◽  
Aris Giannakas ◽  
Antonios Kouloumpis ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Analytical Techniques ◽  
Polymer Nanocomposite ◽  
Precipitation Method ◽  
Templating Method ◽  
Polymer Properties ◽  
Wide Range ◽  
First Time ◽  
Range Of Values ◽  
Carbon Nanowires

Carbon into polymer nanocomposite is so far a common additive for the enhancement of the polymer properties. The properties of the polymer, such as thermal, and especially its mechanical properties, are improved by the homogeneously dispersed carbon nanoparticles on the polymer matrix. In this study, carbon wires in nano dimensions are, for the very first time, synthesized via the hard templating method from the silicate matrix MCM-41, and used as nano additives of polystyrene. The carbon nanowires were chemically oxidized, and further modified by attaching octadecylamine molecules, for the development of organic functionalities onto carbon nanowires surface. The nanocomposite materials of polystyrene with the modified carbon nanowires were prepared by a solution-precipitation method at three nano additive to polymer loadings (1, 3 and 5 wt%). The as-derived nanocomposites were studied with a combination of characterization and analytical techniques. The results showed that the thermal and mechanical properties of the polystyrene nanocomposites gradually improved while increasing nano-additive loading until 3 wt%. More specifically, the 3 wt% loading sample showed the best mechanical properties, while the 5 wt% sample was difficult to achieve satisfactory dispersion of carbon nanowires and consequently has a wide range of values.

Plasma printing - direct local patterning with functional polymer coatings for biosensing and microfluidics applications

2020 ◽  
Vol 233 ◽  
pp. 111431
Author(s):  
Laura Barillas ◽  
Ekaterina Makhneva ◽  
Klaus-Dieter Weltmann ◽  
Hermann Seitz ◽  
Katja Fricke
Keyword(s):  
Polymer Coatings ◽  
Functional Polymer

Functional Polymer Coatings for Photonic Devices

2014 ◽  
Author(s):  
M. S. Cano-Velázquez ◽  
A. M. Velázquez-Benítez ◽  
J. R. Vélez-Cordero ◽  
J. Hernández-Cordero
Keyword(s):  
Polymer Coatings ◽  
Photonic Devices ◽  
Functional Polymer

A BIOLOGICALLY MOTIVATED ASSOCIATIVE MEMORY ARCHITECTURE

1993 ◽  
Vol 04 (02) ◽  
pp. 109-127
Author(s):  
COE F. MILES ◽  
DAVID ROGERS
Keyword(s):  
Storage Capacity ◽  
Interconnection Network ◽  
Distributed Storage ◽  
Analytical Techniques ◽  
Memory Model ◽  
Memory Architecture ◽  
Science And Engineering ◽  
Statistical Reconstruction ◽  
Functional Circuitry ◽  
And Storage

A synthesis of analytical techniques from the fields of biology, mathematics, computer science and engineering are used to model the information processing characteristics of the mammalian cerebellar cortex. By viewing anatomically different neurons as representing network elements whose input-output functions are different, a mechanism for distributing information throughout the memory is proposed. The functional circuitry developed to implement this feature is called the microcircuit. Overlapping microcircuit activity is used to describe the memory's read and write operations. Key features of the memory model include: (1) its use of a sparse interconnection network, (2) its ability to manipulate very large input patterns, (3) its distributed storage of input data patterns and (4) its statistical reconstruction of stored patterns during memory read operations. Quantitative measures for the memory's recall fidelity and storage capacity are derived and results of computer simulations are presented.

Biodegradation of Polymer Coatings

1994 ◽  
Vol 344 ◽  
Author(s):  
William R. Jones ◽  
Marianne Walch ◽  
Joanne Jones-Meehan
Keyword(s):  
Cost Effective ◽  
Polymer Coatings ◽  
Activity Levels ◽  
Polymeric Coatings ◽  
Environmentally Safe ◽  
Pressure Water ◽  
Paint Stripping ◽  
Degradation Activity ◽  
Paint Removal ◽  
Microbial Systems

AbstractConventional paint removal methods include chemical stripping with VOCs, blasting with plastic media, and delamination with high pressure water. These methods have many limitations, in that they are labor intensive, pose human health risks, are relatively expensive and pose significant waste disposal problems. However, polymeric coatings are known to contain structural components, such as ester, amide and urea linkages, that can be degraded biologically. We are working to develop a stable, enzyme-based, non-toxic paint stripping strategy that will be environmentally safe and cost effective.The specific objectives are to identify and characterize microbial systems capable of degrading polymeric coatings, to develop a quantitative degradation assay and to optimize activity levels for subsequent purification and concentration of the biological products required for rapid degradation of coatings.A water-dispersed colloid of an ester-based polyurethane polymer has been used in solid growth medium to screen about 100 different bacteria for microbial degradation activity. Those with demonstrable activity have been grown in the presence of epoxypolyamide paint- and polyester polyurethane paint-coated aluminum coupons. We have demonstrated delamination under certain conditions and have developed a spectrophotometric method for quantitating degradation activity as a function of dye release.

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