Search Results - chemicals

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Enriching Inlet
THE CHALLENGE More than 99.9999% of air is comprised of gases that are not chemically reactive (e.g., nitrogen, oxygen, carbon dioxide), even in polluted regions. The remaining <0.0001% of air includes all the components that form what we typically think of as air pollution (toxic odors, particulate matter, ozone, etc.). Due to these extremely low...
Published: 10/11/2021   |   Inventor(s): Gabriel Isaacman-Van Wertz
Category(s): Environment, Chemicals, Consumer Products, Engineering, Materials
Polymerization Via a Metal Centered Catalyst from Nanocellulose
High-density polyethylene composites are now able to go beyond previously realized storage moduli at 6-7% v/v loading using cellulose nanocrystals (CNC)s as the filler material. Using a custom catalyst, polymerization is carried out directly from the surfaces of the CNCs in a heterogeneous (slurry) fashion. Mechanical testing showed that this...
Published: 2/8/2019   |   Inventor(s): Earl Foster, Keith Hendren, Paul Deck, Travis Baughman
Category(s): Process/Procedures, Chemicals, Engineering
Cyclic gamma-Amino Acids and Peptoid Foldamers
Isonipecotic acid provides a stable scaffold with the potential for useful functionalization. Changing the side chains at the β- or γ-positions in the piperidyl ring will tune a peptide towards its biological target or catalytic function. Modifications at these positions is expected to have little effect on the chair conformation adopted...
Published: 11/27/2017   |   Inventor(s): Jatinder Josan, Robert Grams
Category(s): Medical, Biomedical, Biology, Biotechnology, Chemicals, Drug Delivery, Drug Discovery
Large Area - High Resolution Additive Manufacturing of Thin Patterned Membranes with Varying Thickness Using a Continuous, Recoat-less Vat Photopolymerization Technique
A fast, low cost manufacturing process/machine for large scale additive manufacturing of thin films and complex contours for abrasive/adhesion linings and semi-permeable membranes .
Published: 11/27/2017   |   Inventor(s): Viswanath Meenakshisundaram, Christopher Williams
Category(s): Chemicals
Gel for Ion Conduction Applications with Mechanical Strength
As key components of many energy storage and conversion technologies, polymer electrolyte materials allow for selective ion transport in diverse applications such as fuel cell membranes, battery separators, electro-responsive actuators, reverse-osmosis water purifiers, and solar cells. For electrochemical devices, solid-state polymer electrolyte materials...
Published: 11/30/2022   |   Inventor(s): Louis Madsen, Ying Wang
Category(s): Chemicals, Computer Hardware, Consumer Products, Devices, Electrical, Energy, Engineering, Materials
Porous Carbon Fiber from Block Copolymers
Carbon fibers are used in a wide range of industries and applications including composites, catalysis, sensing, energy conversions and storage and membrane filtration. One approach to make carbon fibers utilizes electrospinning of block copolymers. However, due to challenges associated with the technique, it can be difficult to produce carbon fibers...
Published: 7/1/2021   |   Inventor(s): Guoliang Liu, Zhengping Zhou
Category(s): Chemicals, Materials, Engineering, Energy, Electrical
Foams from (Ethylene Copolymers with) Inorganic Physical Blowing Agents with Improved Properties
The invention is directed to foamable compositions and foaming of ethylene-based copolymers containing carbon monoxide as a co-monomer with inorganic physical blowing agents with improved foaming features compared to ethylene copolymers that do not contain carbon monoxide.
Published: 11/27/2017   |   Inventor(s): Erdogan Kiran, David Dean, John Bishop
Category(s): Chemicals, Engineering
Binderless Jetting -- Using Nanoparticles to Replace Polymer Binders in Binder Jetting of Metal
In Binder Jetting of metals, polymer binding is selectively jetted onto a powder bed of metal to form a green part. Following printing, the green part undergoes a sintering post-process wherein the polymeric binder is pyrolized and the metallic particles sinter together. The use of polymer binders limits the printing process as they (i) burn off before...
Published: 1/9/2023   |   Inventor(s): Yun Bai, Christopher Williams
Category(s): Chemicals
Controlled Photoredox Ring-Opening Polymerization
Poly(a-hydroxy acids) (PAHAs), including polylactide (PLA), are important polymers that have been widely used in applications ranging from biomedical devices to packaging materials. We develop an unprecedented methodology to prepare high molecular weight PAHAs with side chain functionality.
Published: 11/27/2017   |   Inventor(s): Rong Tong, Quanyou Feng
Category(s): Chemicals
Piperazine-containing Dilithium Anionic Initiators for Isoprene Polymerization
A novel process that uses piperazine-containing dilithium anionic initiators has been developed at Virginia Tech. This process has yielded unprecedented polymerization of isoprene and polystyrenic block copolymers with improved specificity and repeatability. Resulting products could include any number of low-VOC adhesive and coatings.
Published: 11/27/2017   |   Inventor(s): Alison Schultz, Sachin Bobade, Timothy Long
Category(s): Chemicals, Process/Procedures, Consumer Products, Materials, Engineering
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