Abstract: The present invention relates to the field of medical health monitoring. Disclosed in the present invention is an on-skin sensing system for detecting blood flow status in a postoperative flap and reconstructed limb, the system including a front-end status detection module and a back-end signal processing and outputting module. The front-end status detection module acquires, in real time, blood oxygen saturation and temperature statuses of postoperative flaps and reconstructed limbs. The front-end status detection module uses a flexible packaging layer to package a printed circuit board, and after the surface of the flexible package layer is chemically treated, a pre-polymerized hydrogel solution is injected to carry out cross-linking to obtain a hydrogel adhesive layer, thereby ensuring long-time close attachment to the skin while avoiding bacterial infection on the surface of the skin.

Abstract: Embodiments of this invention are directed to bio-based epoxy compositions. and method of their preparation and use. Other embodiments are directed to cured bio-based epoxies, and manufactured articles having bio-based epoxy coatings, adhesives. or composites.

Abstract: Processing facilities, systems, devices, equipment, and associated methods of processing for recycling thermosetting polymers are described herein. In one example, a process includes reacting, under atmospheric pressure, a thermosetting polymer with a catalytic solution containing a solvent having sulfolane and/or a derivative thereof. The reaction converts the thermosetting polymer to polymer fragments dissolvable in the sulfolane and/or the derivative thereof of the catalytic solution. The process then includes causing the polymer fragments to precipitate as solid polymer fragments from the catalytic solution and separating the precipitated polymer fragments from the catalytic solution. As such, the thermosetting polymer can be recycled as the solid polymer fragments.

Abstract: The present invention relates to the field of medical health monitoring. Disclosed in the present invention is an on-skin sensing system for detecting blood flow status in a postoperative flap and reconstructed limb, the system including a front-end status detection module and a back-end signal processing and outputting module. The front-end status detection module acquires, in real time, blood oxygen saturation and temperature statuses of postoperative flaps and reconstructed limbs. The front-end status detection module uses a flexible packaging layer to package a printed circuit board, and after the surface of the flexible package layer is chemically treated, a pre-polymerized hydrogel solution is injected to carry out cross-linking to obtain a hydrogel adhesive layer, thereby ensuring long-time close attachment to the skin while avoiding bacterial infection on the surface of the skin.

Abstract: A high-efficiency, low-energy consumption and environmental-friendly recycling technology for PETE plastic waste is disclosed. The degradation of PETE plastic waste includes a method for attacking the —O— ester linkage in the repeat unit of PETE plastic with water in saturated pressure and CO2 in supercritical (Sc) conditions.

Abstract: Embodiments of this invention are directed to bio-based epoxy compositions, and method of their preparation and use. Other embodiments are directed to cured bio-based epoxies, and manufactured articles having bio-based epoxy coatings, adhesives, or composites.

Abstract: A high-efficiency, low-energy consumption and environmental-friendly recycling technology for PETE plastic waste is disclosed. The degradation of PETE plastic waste includes a method for attacking the —O— ester linkage in the repeat unit of PETE plastic with water in saturated pressure and CO2 in supercritical (Sc) conditions.

Abstract: Techniques for chemically recycling cellulose waste such as cotton are disclosed herein. In one embodiment, a method includes hydrolyzing a cotton waste and dissolving cellulose in the hydrolyzed cotton waste in an aqueous solution containing an alkali and one or more of urea ((NH2)2CO), polyethylene glycol, or thiourea (SC(NH2)2) to produce another aqueous solution containing dissolved cellulose. Then the another aqueous solution containing the dissolved cellulose can be extruded into a coagulation bath to coalesce the dissolved cellulose in the extruded solution, thereby reforming the dissolved cellulose from the cotton waste into a regenerated fiber.

Abstract: A recyclable polyurethane foam is produced by reacting a carbon dioxide-based polyol-containing composition and an isocyanate composition. The polyurethane foam may include a molar ratio of active hydrogen to isocyanate groups of 1:0.9. The polyurethane foam may include a catalyst at about greater than or equal to about 0.5 to less than or equal to about 1.5 parts by weight percent.

Abstract: A recyclable polyurethane foam is produced by reacting a disulfide reactive chemical-based polyol-containing composition and an isocyanate composition. The polyurethane foam may include a molar ratio of the disulfide reactive chemical of greater than or equal to about 2:1 mol %, 4:1 mol %, or 6:1 mol %, wherein the ratio equates to the molar ratio of hydroxyl groups of the disulfide reactive chemical versus the molar ratio of hydroxyl groups of the polyol.

Abstract: Disclosed is a novel room-temperature curable bio-based epoxy vitrimer with a simple design of the chemical structure. A hempseed oil-derived glycidyl ester type epoxy (HOEP) was synthesized and then blended with a bisphenol A epoxy (DER331) to manipulate the properties of the resulting vitrimer s. An aliphatic amine hardener, diethylenetriamine (DETA), was selected as hardener to realize the room temperature curing in presence of triethanolamine (TEOA) as the catalyst. Unlike the traditional glycidyl ether epoxy-amine the thermosets which are based on stable C-N and ether linkages, the epoxy vitrimer herein includes ester bonds with HOEP and hydroxyls formed from the reaction of amine and epoxy in its cross-linked network. Dynamic transesterification (DTER) between the ester bonds and hydroxyls take place at elevated temperatures, imparting the vitrimer significant stress relaxation behavior and repairability. This provided a viable method to produce room temperature curable epoxy vitrimer s.

Abstract: Embodiments of this invention are directed to bio-based epoxy compositions, and method of their preparation and use. Other embodiments are directed to cured bio-based epoxies, and manufactured articles having bio-based epoxy coatings, adhesives, or composites.

Abstract: A high-efficiency, low-energy consumption and environmental-friendly recycling technology for PETE plastic waste is disclosed. The degradation of PETE plastic waste includes a method for attacking the —O— ester linkage in the repeat unit of PETE plastic with water in saturated pressure and CO2 in supercritical (Sc) conditions.

Abstract: The present embodiments herein generally relate to thermoset resins that are derived from vegetable oil based sources, including fibrous plant sources. The utilization of plant based oil as starting materials makes the technology a green alternative to currently available solutions. This, coupled with the novel synthetic methods that are utilized, results in a transformation of the plant based oils into useful, durable, and resilient thermoset resins.

Abstract: The present embodiments herein generally relate to thermoset resins that are derived from vegetable oil based sources, including fibrous plant sources. The utilization of plant based oil as starting materials makes the technology a green alternative to currently available solutions. This, coupled with the novel synthetic methods that are utilized, results in a transformation of the plant based oils into useful, durable, and resilient thermoset resins.

Abstract: The present embodiments herein generally relate to thermoset resins that are derived from vegetable oil based sources, including fibrous plant sources. The utilization of plant based oil as starting materials makes the technology a green alternative to currently available solutions. This, coupled with the novel synthetic methods that are utilized, results in a transformation of the plant based oils into useful, durable, and resilient thermoset resins.

Abstract: The subject matter disclosed herein is generally directed to methods of recycling epoxy polymers using organic salts as catalysts in an aqueous solution. Epoxy polymers and their composites are widely used in many fields such as coatings, adhesives, wind blades, automobiles, aeronautic vehicles, and sporting goods. However, the management of thermoset composite wastes is becoming a public concern as the out of service thermoset products build up. With the increasing awareness of environmental protection and the depleting of landfill sites, it is of great importance to develop an economically viable and environmentally-friendly recycling technology of thermoset materials that is suitable to industrial scale-up production. As such, there is a clear and present need for a novel solution that is environmentally friendly and scalable in the market.

Abstract: Techniques for chemically recycling cellulose waste such as cotton are disclosed herein. In one embodiment, a method includes hydrolyzing a cotton waste and dissolving cellulose in the hydrolyzed cotton waste in an aqueous solution containing an alkali and one or more of urea ((NH2)2CO), polyethylene glycol, or thiourea (SC(NH2)2) to produce another aqueous solution containing dissolved cellulose. Then the another aqueous solution containing the dissolved cellulose can be extruded into a coagulation bath to coalesce the dissolved cellulose in the extruded solution, thereby reforming the dissolved cellulose from the cotton waste into a regenerated fiber.

Abstract: The present embodiments herein generally relate to thermoset resins that are derived from vegetable oil based sources, including fibrous plant sources. The utilization of plant based oil as starting materials makes the technology a green alternative to currently available solutions. This, coupled with the novel synthetic methods that are utilized, results in a transformation of the plant based oils into useful, durable, and resilient thermoset resins.

Abstract: The present embodiments herein generally relate to thermoset resins that are derived from vegetable oil based sources, including fibrous plant sources. The utilization of plant based oil as starting materials makes the technology a green alternative to currently available solutions. This, coupled with the novel synthetic methods that are utilized, results in a transformation of the plant based oils into useful, durable, and resilient thermoset resins.