Ammonium persulfate 40 mM was added slowly over the period of 10 minutes to a solution containing 3-aminophenylboronic acid 40 mM , sodium fluoride 40 mM and excess D-fructose 10 M. Materials Science-Poland, 2006, 24, 261-268. In an embodiment, for example, and without limitation, the polymer may be in the form of a film or of a coating. Here we demonstrate a new strategy utilizing a chemically modified conducting polymer poly anilineboronic acid that forms anionic crosslink sites. In an embodiment, there is provided a substrate protected with an anticorrosive composition produced by the method as described anywhere herein.
The surface elemental compositions were determined by the ratios of peak areas corrected with sensitivity provided by Kratos for the Axis Ultra analyzer. The method according to claim 10 having a molecular weight of at least 100,000. This has important implications toward synthesis yield, molecular weight , processing controlled precipitation , and implementation extended pH range. In an embodiment, the aliphatic alcohol may be, for example, and without limitation, an anhydrous alcohol. In an embodiment, the polymer may be, for example, and without limitation, purified to remove excess reactants and byproducts using phosphoric acid. Since both zinc and chromium are heavy metals, there is a keen interest in reducing their introduction to the environment.
In an embodiment, the monomer may be, for example, and without limitation, 3-aminophenyl boronic acid or a salt thereof. This has important implications toward synthesis yield, molecular weight , processing controlled precipitation , and implementation extended pH range. Journal of Applied Electrochemistry, 2008, vol. The techniques include providing a sensor array including at least a first sensor and a second sensor in an arrangement having a defined fluid flow path, exposing the sensor array to a fluid including an analyte by introducing the fluid along the fluid flow path, measuring a response for the first sensor and the second sensor, and detecting the presence of the analyte in the fluid based on a spatio-temporal difference between the responses for the first and second sensors. The purpose of this book is to cover the rapidly developing area of self-doped conducting polymers, with the goal of describing the wide range of approaches that have been developed to synthesize, characterize and utilize them. Sensors and Actuators B: Chemical, 2004, 101, 47-56.
In an embodiment, there is provided a substrate protected with an anticorrosive polymer produced by the method as described anywhere herein. In an embodiment, the monomer having a boronic acid moiety may be, for example, and without limitation, a monomer that can undergo oxidative polymerization. This method allows the casting and spin-coating of films on conducting as well as insulating substrates with conductivities as well as optical and redox properties similar to those reported for chemically vapor phase and electrochemically synthesized thin films. The I D-V G characteristics show that the potential window of high conductivity is pH dependant similar to the redox behavior. In an embodiment, the compound having a phosphate moiety may be, for example, and without limitation, a compound having a phosphate moiety that is available for interacting with boron. Suitable oxidizing agents would be understood to and can be determined by those of ordinary skill in the art. A method of preparing an anti-corrosive polymer comprising: mixing, in any order, a monomer having a boronic acid moiety, or a salt thereof, a compound having a fluoride moiety and an oxidizing agent in the presence of phosphoric acid.
In the case of poly 1 , the atomic ratios C:N:O; theoretical-6:1:2 and experimental-6:1:2 are similar to that of the uncomplexed monomer, indicating that D-fructose is no longer present in the polymer and that it is therefore in a non-self-doped state. He was educated at Florida Atlantic University and gained his PhD at the University of Florida. Poly 2 was precipitated by reducing the fluoride concentration via dilution. Thin Solid Films, 2008, vol. .
Atomic ratios of the poly 2 confirmed the presence of somewhat more than one equivalent of D-fructose bound to the boronic acid group on the backbone C:N:O: theoretical-12:1:6 and experimental-16:1:11. More preferably, the molecular weight of the polyaniline polymers ranges from 100,000 to 2,000,000. Canadian Biosystems Engineering, 2001, vol. Each member is given 50 PubFacts points upon signing up. The mixture was stirred overnight at room temperature. In an embodiment, the solvent may comprise, for example, and without limitation, aqueous phosphoric acid.
The citation of any publication, patent or patent application in this specification is not an admission that the publication, patent or patent application is prior art. These results suggest that the stability of the dispersions in phosphoric acid relative to hydrochloric acid is due to the interaction of the phosphate with the boronic acid substituent. The polymer has a morphology tunable by changing the solvent. Thesis Submitted to the University of Manitoba, Aug. In an embodiment, the anticorrosive polymer may be, for example, and without limitation, for a substrate. Following conversion to poly 1 the spectra exhibits reduced intensity for all bands, which is consistent with the emeraldine base form of polyaniline and is due to charge carrier motion connected with lower conductivity of the polymer. Abstract: The present invention includes sensors and systems that include a sensor.
In an embodiment, the solvent may be, for example, and without limitation, water, methanol, ethanol, 1-propanol, isopropanol, butanol or octanol. Spectra were acquired with electron charge compensation in operation to avoid sample charging. Following filtration and rinsing with water, the precipitate was washed with 0. In an embodiment, the compound having a phosphate moiety may be, for example, and without limitation, a phosphate salt. For a review, see: Springsteen, G. Suitable compounds having a fluoride moiety would be understood to and can be determined by those of ordinary skill in the art. Kirby 7922 7922 Highlights Weighing biomolecules: Resonant cantilevers allow ultrasensitive weighing by detecting changes in the resonant frequency when mass is added to the cantilever.