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Patent
Michigan Molecular Institute and Central Michigan University | Date: 2015-02-23

The present invention provides a sustained release composition having hyperbranched polymers that are polyesters that are biobased and biodegradable, and that have at least one active ingredient, which composition delivers the active ingredient over time. These active ingredients can be a wide variety of compounds so long as they can covalently bind to the polymer or be encapsulated in the polymer in a manner that is released at the point of delivery, usually by acid hydrolysis or enzymatic bond scission.


Decker B.,Chemsultants International | Hartmann-Thompson C.,Michigan Molecular Institute | Carver P.I.,Michigan Molecular Institute | Keinath S.E.,Michigan Molecular Institute | Santurri P.R.,Chemsultants International
Chemistry of Materials | Year: 2010

Single-layer proton exchange membranes (PEMs) have been under development for several decades. The current use of conductive polymers in PEM fuel cells has been limited primarily to single layered sulfonated fluoro polymers,Nafion. Although this architecture has certain positive characteristics, it lacks the robust properties required for use in high-temperature, low = humidity conditions. In this work, a multilayer composite PEM consisting of outer layers of sulfonated polyphenylsulfone (S-PPSU) and an inner layer blend of octa-sulfonatcd octaphenyl-POSS (S-POSS) and S-PPSU has been developed and shown to exhibit good conductivity, physical and chemical durability, and high strength. The multilayer composite PEM showed improved conductivity at 90 °C and 25% RH relative to analogous single-layer S-POSS-S-PPSU PEMs and to the typical sulfonated fluoro polymers currently in use.


Owen M.J.,Michigan Molecular Institute
Silicon | Year: 2014

Polydimethylsiloxane (PDMS), the most familiar silicone polymer, is a very water repellent material. Its hydrophobicity is not markedly less than many fluorine containing polymers. The original purpose of introducing fluorine into silicones in the form of polymethyltrifluoropropylsiloxane (PMTFPS) was not to seek enhanced water repellency but to provide improved resistance to organic oils and solvents. Because of the two methyl groups on each silicon atom in PDMS, the resultant oleophilicity is a considerable drawback in applications involving exposure to hydrocarbon fluids and oils. In this article we survey the contact angles with water and n-hexadecane of these polymers and related, more highly fluorinated fluorosilicones, being the simplest measure of their hydrophobicity and oleophilicity, respectively. These contact angle values provide quantitative insight into commercially valuable aspects of silicone surface science. © 2014 Springer Science+Business Media Dordrecht.


Owen M.J.,Michigan Molecular Institute
Silicon | Year: 2015

The author, to his surprise, encountered glassblowing demonstrations on two recent cruises, one in the Caribbean and one on a Danube/Rhine river journey. © 2015 Springer Science+Business Media Dordrecht


Owen M.J.,Michigan Molecular Institute
ACS Symposium Series | Year: 2010

Uses that relate to surface properties dominate the silicone industry. Since only aliphatic fluorocarbon-based materials have lower surface energies than conventional silicones such as polydimethylsiloxane (PDMS), it can be expected that fluorocarbon-modified silicones, i.e. fluorosilicones, would exhibit interesting and useful surface behavior. The fundamental characteristics of fluorosilicones are summarized. Significant properties such as surface energy and glass transition temperature are reviewed and related to important applications like release behavior. A particularly interesting subset of these fluorocarbon/silicone hybrids is the perfluoroether-modified silicones. Useful new fluorosilicone materials for release and other applications are a consequence of having both side-chains and backbone that are flexible, low-glass-transition entities. © 2010 American Chemical Society.


Patent
Michigan Molecular Institute | Date: 2011-01-19

The HBP Free-POSS compounds of Formula I are superior to prior HB polymers and linear polymers in space and electronic applications because they have better resistance to electrons, protons and atomic oxygen, have superior out-gassing performance, and are transparent. They are used as coatings, films, adhesives, sealants and elastomers.


Patent
Michigan Molecular Institute | Date: 2010-12-08

A modified carbon-supported metal catalyst is disclosed which has durability and activity wherein the surface of the carbon support has been modified by the addition of silicon carbides or boron carbides made by calcination. This catalyst is used as a catalyzed electrode in fuel cells.


The present invention provides a composition comprising an antimicrobial bilayer coating on a substrate which coating comprises: The bilayers, where an anionic outermost layer is present, is preferred. These coating compositions, applied to a substrate, are then crosslinked and finally treated with aqueous hypochlorite when NX is NCl. The substrate that is coated can be sterilized prior to applying the coating composition, but it is not required to do so. These coatings are useful for military and hospital equipment and environments, especially against spores.


Patent
Michigan Molecular Institute | Date: 2010-04-08

The present invention relates to surface modification of reverse osmosis membranes to introduce antifouling properties without compromising the separation properties of the original membranes. This approach utilizes: providing a coated membrane surface having enhanced hydrophilic characteristics that prevents the biofoulants from settling; have a surface that consists of hydrophilic brushes that unsettle any biofoulants that get through; and having antimicrobial ions present in the membrane coatings and able to remove or minimize any remaining biofoulants without leaching into the permeate. These coatings are made using dendritic polymers such as hyperbranched polymers or dendrimers.


Patent
Michigan Molecular Institute | Date: 2010-04-21

The present invention provides a polymer delivery system for the in vivo binding and release of growth factors, preferably orthobiologic GF, comprising a hyperbranched polymer having physiologically-acceptable anionic phosphorous groups. The hyperbranched polymer is preferred to be a polyurea with phosphonate anions. This polymer can be cross-linked to form a network and provide a coating for implanted devices.

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