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183 Results for 'Materials & Chemicals'
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Technology
Dense Polymer Brush Growth with New Copolymer
Polymer brushes are a broad class of materials consisting of a polymer chain tethered at one end to a surface. These brushes have a variety of uses given their ability to tune or modify surface proper...
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Padma Gopalan, Daniel Sweat, Myungwoong Kim | P130169US02
Technology
Concentrated C5 and C6 Sugars from Biomass
Widespread production of sustainable fuels and chemicals will require cost-effective methods for breaking down biomass into its constituent sugars. Attaining high yields of concentrated C5 and C6 carb...
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James Dumesic, David Martin Alonso, Jeremy Luterbacher | P140075US01
Technology
Powering Devices with Piezoelectric ‘Sponge’
Piezoelectric materials produce electric charge in response to mechanical stress. Such materials can be utilized as very small ‘nanogenerators’ that absorb vibrations from the environment (e.g., a...
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Xudong Wang, Ping Zhao, Yanchao Mao | P130228US01
Technology
Environmentally Green Glue
Formaldehyde-based adhesives have been used to make interior plywood and particle board for decades. These synthetic adhesives, which are derived from petroleum, are inexpensive and perform well. Howe...
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Srinivasan Damodaran, Dani Zhu | P130276US02
Technology
An Orthopedic Implant Coating for Enhanced Bone Growth
"Orthobiologics" provides an improved method of treating fractures and other bone defects. This therapy employs inductive molecules, such as bone morphogenetic protein-2 or bone morphogeneti...
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William Murphy, Jae Sam Lee, Mark Markel, Ben Graf | P07031US
Technology
Modified Microbes Tolerate 50-Fold More Organic Acid
Production of industrial chemicals has long relied on petroleum-based starting material. As reserves of fossil carbon dwindle, a new approach is looking to microorganisms and their ability to convert ...
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Brian Pfleger, Matthew Begemann | P120017US02
Technology
Superior Plastic Parts
Plastics are the most widely used materials in the United States, surpassing steel, copper and aluminum combined by volume. While ubiquitous, fossil-based plastics are becoming more and more costly to...
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Lih-Sheng Turng, Xiaofei Sun | P140042US01
Technology
Smoother Plastic Products Using Microcellular Injection Molding
Several techniques exist for turning plastic into goods and packaging. Microcellular foams are of particular interest because they can be used to produce strong, lightweight plastic. Unfortunately, du...
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Lih-Sheng Turng, Eugene Dougherty, Chris Lacey, Jungjoo Lee, Pat Gorton, Keith Edgett, Xiaofei Sun | P110078US01
Technology
Phosphine Ligands Made Cheaper, Better
Enantiomers are pairs of compounds that have the same chemical formula but different spatial structures (like your left and right hand, they are non-superimposable mirror images of each other). This i...
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Jennifer Schomaker, Robert Grigg, Ryan Van Hoveln | P130268US02
Technology
Masks for Growing Nanopatterned Polymer Brushes
Polymer brushes are a broad class of materials made of polymer chains tethered at one end to a substrate. These brushes are able to tune and modify surface properties like bioadhesion and wettability....
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Padma Gopalan, Daniel Sweat, Myungwoong Kim, Eungnak Han | P130118US01
Technology
New Surface-Modifying Film for BCP Formation
Block copolymers (BCPs) self-assemble into well-defined, highly regular and dense nanostructures. Such BCP arrays are useful for fabricating electronic devices like magnetic storage media, quantum dot...
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Padma Gopalan, Eungnak Han, Myungwoong Kim | P130124US01
Technology
Degradable Neutral Layer for BCP Lithography
The lithographic process is one of the most powerful technologies of the digital electronics era. Lithography allows hundreds of millions of components to be fabricated on a single chip with pattern f...
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Padma Gopalan, Daniel Sweat, Jonathan Choi, Myungwoong Kim | P130174US01
Technology
Highly Foamed Plastic Parts Are Stronger and Cheaper to Produce
Microcellular injection molding produces lightweight, dimensionally stable plastic components using fewer raw materials than standard techniques.The process, also known as ‘microcellular foaming,’...
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Lih-Sheng Turng, Xiaofei Sun | P130051US01
Technology
Improved Disulfide-Bond Reducing Agents
Disulfide bonds between cysteine residues are the most common crosslinking agents in proteins. Reducing these bonds is an ordinary procedure in biochemistry and biotechnology. The most commonly used r...
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Ronald Raines, John Lukesh | P110330US02
Technology
New Conductive Polymers for Lithium Ion Batteries
Batteries can be classified as primary (nonreusable) or secondary (rechargeable). The demand for rechargeable batteries of high energy density and specific energy has surged along with portable electr...
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Mahesh Mahanthappa, Ryan Weber | P120049US02
Technology
Biodegradable Poly(Vinyl Ester) Block Copolymers and Related Poly(Vinyl Alcohol) Surfactants
Common biodegradable polymers such as poly(lactide) and poly (3-hydroxyalkanaoates) are derived from relatively expensive chemical feedstocks and have low melt stability. This presents a challenge for...
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Mahesh Mahanthappa, Corinne Lipscomb, Milton Repollet-Pedrosa | P100170US02
Technology
Degradable Polycations Derived from Amino Acid Vinyl Esters
Degradable polyelectrolytes are useful materials for a variety of biological applications, from implant coatings and immunostimulants to therapeutic and gene delivery. Many of these applications rely ...
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Mahesh Mahanthappa, Corinne Lipscomb, Glen Thomas | P120121US02
Technology
Selective Conversion of Lignin into Simple Aromatic Compounds
Lignin is a major component of non-edible biomass (15-30 percent by weight; 40 percent by energy). It is a cheap byproduct of pulp and biofuel production and is one of the few naturally occurring sour...
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Shannon Stahl, Alireza Rahimi | P130104US01
Technology
Manufacturing Polymer Micropellets
Polymer-based micropellets can be formed having diameters smaller than 50 microns. The miniscule particles are vital to a number of processes like laser sintering—used to build rapid prototypes and ...
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Tim Osswald, Martin Launhardt | P100314US02
Technology
Controlling the Size and Shape of Polymer Micropellets
Polymer-based pellets are utilized in plastics manufacturing. In particular, very small micropellets and powders are in special demand for processes like selective laser sintering (SLS), which require...
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Tim Osswald, William Aquite | P130088US01
Technology
Crosslinkable Gemini Dicarboxylate Surfactant LLCs and Their Membranes
Aqueous lyotropic liquid crystal (LLC) assemblies are useful for highly selective chemical separations, such as water desalination and selective ion-transporting membranes. LLCs are formed in water wh...
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Mahesh Mahanthappa, Gregory Sorenson | P120048US02
Technology
Superior Nanocomposite Welding Wire
Advanced metal alloys with high strength and fracture toughness are used in an increasing number of applications. However, some metal alloys like Al-Cu have been underutilized due to poor weldability....
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Xiaochun Li, Hongseok Choi, David Weiss | P130003US01
Technology
Generating Medical Isotopes with Safer Vessel and Materials
Medical isotopes are valuable healthcare tools for patient imaging and disease treatment. Yet most radioisotopes used in medicine are produced in nuclear reactors, which are complex, generate high vol...
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Gregory Piefer, Thad Heltemes, Ross Radel, Eric Van Abel | P120047US01
Technology
Easier, More Flexible Synthesis of Therapeutic and Promising Compounds
Many pharmaceuticals and other biologically active molecules contain chemical sequences called triads that are challenging to prepare in the laboratory. Specifically, triads are three or more contiguo...
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Jennifer Schomaker, Luke Boralsky, John Hershberger, Jared Rigoli, Christopher Adams | P110299US02
Technology
Improved Immiscible Alloy Formation with Stabilizing Nanoparticles
Immiscible alloys are composed of materials that meld together above a certain temperature but become unstable and separate as the solution cools. For example, elements like bismuth or tin may coagula...
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Xiaochun Li, Lianyi Chen, Jiaquan Xu | P120305US01