摘要:
Germanium-based polymers are described. In one embodiment, a germanium-based polymer includes a structure given by the formula: [GeR]n, wherein n is a non-negative integer that is at least one, and R is selected from a wide variety of groups, such as alkyl groups, alkenyl groups, alkynyl groups, aryl groups, iminyl groups, and so forth. Also described are methods of forming germanium-based polymers, methods of forming nanoparticles from germanium-based polymers, methods of forming nanostructured materials from germanium-based polymers, nanoparticles formed from germanium-based polymers, nanostructured materials formed from germanium-based polymers, and devices formed from germanium-based polymers.
摘要:
The present disclosure relates to thermoplastic polymeric microspheres comprising a thermoplastic polymer shell surrounding a hollow core, in which the thermoplastic polymer shell comprises a copolymer of a monomer of Formula 1:
wherein:
each of A1 to A11 are independently selected from H and C1 to C4 alkyl, in which each C1-4 alkyl group can optionally be substituted with one or more substituents selected from halogen, hydroxy and C1-4 alkoxy; A12 is selected from C1 to C4 alkyl, in which the C1-4 alkyl group can optionally be substituted with one or more substituents selected from halogen, hydroxy and C1-4 alkoxy X is a linking group selected from —O—, —NR″—, —S—, —OC(O)—, —NR″C(O)—, —SC(O)—, —C(O)O—, —C(O)NR″—, and —C(O)S—; and
R″ is H or C1-2 alkyl optionally substituted with one or more substituents selected from halogen and hydroxyl.
摘要:
Methods and compositions for improving performance of flocculants in an industrial production process. Methods include pH triggered cross-linking reaction between a flocculating agent, such as dextran, and a composition comprising a boronic acid-containing polymer. The pH trigger can be provided by a fluid having a pH of 8 or more. The production process can be a Bayer Process and the fluid is caustic liquor or slurry in the fluid circuit of the Bayer, wherein the reaction time is reduced over conventional methods and the cross-linked dextran composition effectuates improved flocculation of the trihydrate particles.
摘要:
The present invention relates to a cryogel which contains a polyol selected from polyvinyl alcohol or galactomannan and a co-polymer of Formula I: The cryogel is formed by mixing the monomers of the co-polymer of Formula I at a temperature of less about 5 degrees C. with the polyol and a free radical initiator in an aqueous solution and polymerizing the solution to form the cryogel. The cryogel is used for culturing cells and can be decomposed by contact with a monosaccharide.
摘要:
A minimally invasive glucose-responsive colloidal crystal microneedle (GCC-MN) patch is disclosed for naked-eye glucose monitoring. The (GCC-MN) patch is designed with a resin or polymeric core to mechanically support a shell of glucose-responsive colloidal crystal material for glucose sensing and reporting of glucose concentrations or concentration changes. The GCC-MN patch could translate the glucose concentrations into naked-eye distinguishable color changes within about 5 min, and such glucose responsiveness is reversible. Demonstrated in a type 1 diabetic mouse model, the interstitial fluid extraction, glucose sensing, and resulting glucose-relevant color display procedures are simultaneously achieved with this GCC-MN patch.
摘要:
Polymer foam bodies are made from phosphorus-containing thermoplastic random copolymers of a dialkyl (meth)acryloyloxyalkyl phosph(on)ate. Foam bodies made from these copolymers exhibit increased limiting oxygen indices and surprisingly have good properties. In certain embodiments, the phosphorus-containing thermoplastic copolymer is blended with one or more other polymers and formed into nanofoams.
摘要:
The invention provides cryogels whose porosity, pore size, pore connectivity, swelling agent concentration, and/or specific volume undergoes a change from a first value to a second value in response to an electrical stimulus. The cryogels have interconnected macropores which greatly enhance their ability to rapidly undergo volumetric collapse when subjected to moderate electric fields. The cryogels of the invention can be easily integrated into arrays capable of rapid configurational and chromatic optical modulations, and when loaded with drugs, are able to coordinate the delivery profile of multiple drugs. The cryogel can be prepared by polymerizing an aqueous solution of charged monomers and cross-linker monomers at a temperature below the freezing temperature of the solvent.
摘要:
Disclosed are polymeric foam materials obtained using monomers based on silicon and/or germination. The copolymerization of silicon- or germanium-based monomers provide foams that have low glass transition temperatures and low densities. These foams also exhibit relatively high yield stress values, which make the foams suitable for absorption of fluids, particularly aqueous fluids such as urine and menses (when the foams are rendered hydrophilic). The foams have a variety of other uses, including insulation applications.
摘要:
Polymer foam bodies are made from phosphorus-containing thermoplastic random copolymers of a dialkyl (meth)acryloyloxyalkyl phosph(on)ate. Foam bodies made from these copolymers exhibit increased limiting oxygen indices and surprisingly have good properties. In certain embodiments, the phosphorus-containing thermoplastic copolymer is blended with one or more other polymers and formed into nanofoams.
摘要:
The invention provides cryogels whose porosity, pore size, pore connectivity, swelling agent concentration, and/or specific volume undergoes a change from a first value to a second value in response to an electrical stimulus. The cryogels have interconnected macropores which greatly enhance their ability to rapidly undergo volumetric collapse when subjected to moderate electric fields. The cryogels of the invention can be easily integrated into arrays capable of rapid configurational and chromatic optical modulations, and when loaded with drugs, are able to coordinate the delivery profile of multiple drugs. The cryogel can be prepared by polymerizing an aqueous solution of charged monomers and cross-linker monomers at a temperature below the freezing temperature of the solvent.