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Pressure Sensitive Adhesives
Pressure sensitive adhesives bond two materials when physical pressure is applied to marry the adhesive with the adherent. They are widely applied in self-adhesive tapes, labels and marking films, medical plasters and pads, dermal pharmaceutical dosage forms, medical drapes and biomedical electrodes. Curing current adhesives often involves UV irradiation or heat, capital and energy intensive steps which may produce to toxic byproducts.

 

The invention concerns novel compositions and crosslinking strategies that greatly simplify fabrication of pressure sensitive adhesives.  A soluble and flowable polymer containing latent crosslinking sites is applied to a substrate as a low-viscosity solution or melt.  After application, spontaneous crosslinking occurs at ambient conditions, eliminating the need for post-crosslinking equipment, capital and expense. It also eliminates formation of undesired or toxic residues; allows the formation of crosslinked adhesive layers on temperature-sensitive substrates; enables the use of opaque crosslinkable adhesive formulations; and facilitates the incorporation of adhesives into porous or complex substrates. These strategies may be generalized to broader classes of solvent borne and hot melt pressure adhesives.

 

Published: 8/14/2017   |   Inventor(s): Shelly Peyton, John Klier, Yen Tran, Todd Emrick
Category(s): Engineering, Healthcare, Material science
Novel Systems for Improved Backscatter Tag Communications
A new fully asymmetric backscatter communication protocol where nodes blindly transmit data as and when they sense. This model enables fully flexible node designs, from extraordinarily power efficient backscatter radios that consume barely a few micro-watts to high-throughput radios that can stream at hundreds of Kbps while consuming a paltry tens of micro-watts.

 

 

Published: 8/11/2017   |   Inventor(s): Deepak Ganesan, Pan Hu, Pengyu Zhang
Category(s): Communications & internet, Devices & sensors, Electronics, Engineering, Software & information technology
Chemically Stable Fibers Electrospun from Polyelectrolytes
The invention is a new platform for fabricating nano- and macro- scale fiber materials and for encapsulation. Complex coacervates are associative complexes of positive and negative polyelectrolytes, which form complexes due to a combination of electrostatic and entropic interactions between the oppositely charged polyions. Due to their aqueous solubility, polyelectrolyte solutions are a good medium for encapsulating small molecules. However, while the concept of polyelectrolyte complexes for a drug delivery system and other applications has seen heightened interest in recent years, significant obstacles and challenges remain both in processing technologies and functionalities of the resulting materials.

 

Electrospinning is an established, versatile, inexpensive and scalable process for creating continuous, nanofibrous mats of non-woven nano-/micro-scale diameter fibers. Electrospun mats hold great promise in biomedical, environmental, and industrial fields.

 

The invention provides novel polymer nanofiber or microfiber mats and methods for their preparation via an aqueous, one-step polyelectrolyte complexation and electrospinning of complex coacervates. The process involves an aqueous medium and no organic solvents and/or strongly acidic or basic condition, resulting in chemically and thermally robust fiber mats. Thus, this process and the resulting materials have tremendous potential as a green processing strategy that can serve as the basis for developing a new class environmentally benign fiber scaffolds for use in applications, such as wound healing, water remediation, catalysis, and food packaging.

 

Published: 8/11/2017   |   Inventor(s): Jessica Schiffman, Sarah Perry, Xiangxi Meng
Category(s): Material science, Healthcare, Engineering
Modular and Portable Multi-camera Photogrammetry System
This invention provides a hand-held, portable, and modular photogrammetry system that consists of multiple cameras attached to movable mounting arms coupled to a holdable plate. The system also includes a trigger mechanism that activates the cameras simultaneously.  The system enables rapid (15 - 45 seconds) capture of 2D images of objects for the creation of high-resolution 3D models.
Published: 9/15/2016   |   Inventor(s): Duncan Irschick, Kasey Smart, Dylan Briggs
Category(s): Devices, Engineering
Prosthetic Fitment System
An ill-fitting prosthesis can result in discomfort and can compromise mobility and performance. Therefore, there is a strong need for innovative diagnostic tools for quantifying the socket-limb interface during the fitment process. Scientists at UMass Amherst have developed a prosthetic socket fitment tool which applies recently-available high-precision line-of-sight ultrasound transceivers and intuitive visualization software to provide a quantifiable internal measurement of the residual limb and bone movement to a prosthetist during the fitment process. This tool will inform the positioning of socket components to ensure a comfortable fit for the patient.
Published: 9/15/2016   |   Inventor(s): Frank Sup, Andrew LaPre, Michael White
Category(s): Devices, Diagnostic technology, Healthcare, Engineering
Seatbelt System for Buses – Retrofit or New
A novel seatbelt system has been developed that can be installed independent of the existing bus seats that did not have seatbelts. The invention can be adaptable for inter-city buses (coaches), as well as mid-sized buses and school buses.  Most other seatbelt systems apply only to a specific seat design whereas this invention facilitates a seamless transition for the different seat configurations of the intended buses.  Based on the design and condition of the sets, the strength of the support can be uniquely designed and customized to support the seatbelt design, while maintaining the integrity of the existing bus frame structure.  Thus, this seatbelt system can be expected to be universal and economical.
Published: 9/14/2016   |   Inventor(s): Sundar Krishnamurty, Douglas Eddy, Anne Schewe, Conrad Zanzinger
Category(s): Devices, Engineering
FS Backscatter Communication
The Frequency-Shifted (FS) Backscatter invention promotes practical backscatter communication for ultra-low power on-body sensors by leveraging radios on existing smart phones and wearables. This invention addresses the self-interference from the wireless carrier without relying on built-in capability to cancel or reject the carrier interference.  Utilizing this invention, the tag shifts the carrier signal to an adjacent non-overlapping frequency band and isolates the spectrum of the backscatter signal from the spectrum of the primary signal to enable more robust decoding.
Published: 9/14/2016   |   Inventor(s): Deepak Ganesan, Pengyu Zhang
Category(s): Communications & internet, Devices & sensors, Electronics, Engineering, Software & information technology
Braidio - Assymetric Transceiver for Mobile Devices
 
Published: 9/14/2016   |   Inventor(s): Deepak Ganesan, Pan Hu
Category(s): Communications & internet, Devices & sensors, Electronics, Engineering, Software & information technology
Ultra-high Strength Multilayer Graphene Materials
This invention relates to the use of single crystalline graphene to create multilayer structures of graphene materials with superior shear strength.
Published: 9/14/2016   |   Inventor(s): Christos Dimitrakopoulos, Dimitrios Maroudas, Andre Muniz, D. Kurt Gaskill
Category(s): Material science, Nanotechnology, Electronics, Engineering, Physical Science
Silver Nanoparticles Detection and Analysis in Complex Matrices
Silver nanoparticles (AgNPs) are the most commonly used nanoparticles in many consumer products and related matrices. Given the wide application and formation of AgNPs, the environmental and biological fate and toxicity of the AgNPs needs to investigated comprehensively, including if AgNPs transfer through different trophic levels and impact food chains. This invention was developed by combining hydrophobization-mediated extraction with unique capability of Surface-enhanced Raman spectroscopy (SERS).
Published: 9/13/2016   |   Inventor(s): Lili He, Baoshan Xing, Huiyuan Guo
Category(s): Devices, Diagnostic technology, Environmental, Healthcare, Engineering, Nanotechnology
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