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Low Viscosity Liquid Polymeric Delivery System,Process for preparing halogen-free atrp products,Epoxy resin-enhanced laminated insulating profile and preparation method thereof,Super-hydrophobic polypropylene film and preparation method thereof,Ceramic nanofibers for liquid or gas filtration and other high temperature (> 1000 °c) applications

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10 results about "Polymer solution" patented technology

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Polymer solutions are solutions containing dissolved polymers. These may be liquid solutions (e.g. in aqueous solution), or solid solutions (e.g. a substance which has been plasticized). The introduction into the polymer of small amounts of a solvent (plasticizer) reduces the temperature of glass transition, the yield temperature, and the viscosity of a melt. An understanding of the thermodynamics of a polymer solution is critical to prediction of its behavior in manufacturing processes — for example, its shrinkage or expansion in injection molding processes, or whether pigments and solvents will mix evenly with a polymer in the manufacture of paints and coatings.

Low Viscosity Liquid Polymeric Delivery System

InactiveUS20090181068A1Heavy metal active ingredientsNervous disorderPolymer sciencePolymer solution

Low viscosity biodegradable polymer solutions of a liquid biodegradable polymer and biocompatible solvent and methods of using the compositions to form a liquid polymer implant are provided.

Owner:DUNN RES & CONSULTING

Process for preparing halogen-free atrp products

InactiveUS20090275707A1Obviates advantagePolymer scienceAtom-transfer radical-polymerization

The present invention relates to the in situ removal of terminal halogen atoms from polymer chains which have been prepared by means of atom transfer radical polymerization, and to the simultaneous removal of transition metals from polymer solutions.

Owner:EVONIK ROEHM GMBH

Epoxy resin-enhanced laminated insulating profile and preparation method thereof

InactiveCN105315620AMeet high performance requirementsImprove mechanical propertiesEpoxyFiber

The invention discloses an epoxy resin-enhanced laminated insulating profile. The epoxy resin-enhanced laminated insulating profile comprises modification polymers and a reinforcing material, wherein the modification polymers include epoxy resin, a curing agent, a promoting agent, a flame retardant, a wetting dispersant and a solvent; the reinforcing material is a fiber material; the components of the modification polymers are mixed to form a modification polymer solution, the reinforcing material is soaked into the modification polymer solution and is finally subjected to hot press molding to form the epoxy resin-enhanced laminated insulating profile. The epoxy resin-enhanced laminated insulating profile is integrated with lightness, flame retardance, corrosion resistance and insulativity, has extremely high mechanical property, excellent electrical insulation property and halogen-free flame retardance, is environmentally friendly, is high in use safety and can be applied to industries and fields including State Grid Corporation of China, new energy resources, energy conservation, consumption reduction and track traffic which have high requirements to material performance and special working conditions and environments.

Owner:SICHUAN D&F ELECTRICAL TECH

Super-hydrophobic polypropylene film and preparation method thereof

InactiveCN105860120AGood surface structure stabilityEasy to operateCoatingsAlkaneChemical treatment

The invention relates to super-hydrophobic film materials and provides a super-hydrophobic polypropylene film and a preparation method thereof. The super-hydrophobic polypropylene film is characterized in that an isotactic polypropylene-b-polyethylene glycol diblock copolymer serves as a surface modifier to construct a micronano composite structure on the surface of the polypropylene film. The preparation method includes steps: dissolving the isotactic polypropylene-b-polyethylene glycol diblock copolymer in an alkane solvent to obtain a polymer solution, coating to the surface of the polypropylene film by spin coating, putting the polypropylene film subjected to surface modification into a vacuum drying oven, and performing vacuum drying to obtain the super-hydrophobic polypropylene film. The super-hydrophobic polypropylene film and the preparation method thereof have advantages that simplicity in operation is achieved, complex chemical treatment is avoided, and expensive equipment is not needed; the preparation method is high in efficiency, feasible, environment friendly, low in cost and easy for industrialization; the prepared super-hydrophobic polypropylene film has excellent surface structural stability.

Super-hydrophobic polypropylene film and preparation method thereof

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Owner:ZHEJIANG UNIV

Ceramic nanofibers for liquid or gas filtration and other high temperature (> 1000 °c) applications

InactiveUS20100139226A1Electric discharge heatingElectric discharge tubesFiberOxide ceramic

In accordance with the invention there are devices and processes for making ceramic nanofiber mats and ceramic filters for use in high temperature and in corrosive environments. The process for forming a ceramic filter can include electrospinning a preceramic polymer solution into a preceramic polymer fiber having a diameter from about 10 nm to about 1 micron and forming a preceramic polymer fiber web from the preceramic polymer fiber onto a collector. The process can also include pyrolyzing the preceramic polymer fiber web to form a ceramic nanofiber mat having a diameter less than the diameter of the preceramic polymer fiber, the ceramic nanofiber mat comprising one or more of an oxide ceramic and a non-oxide ceramic such that the ceramic fiber mat can withstand temperature greater than about 1000° C.

Owner:UNIV OF FLORIDA RES FOUNDATION INC

Zirconium hydroxide nanosheet/nanofiber composite membrane and preparation method thereof

ActiveCN112832018AStable structurePlay a key roleSynthetic fibresSpinningPolymer solution

The invention discloses a zirconium hydroxide nanosheet/nanofiber composite membrane and a preparation method thereof. The composite membrane is of a hierarchical pore structure, wherein the zirconium hydroxide nanosheets are constructed at the surface confinements of the polymer nanofibers and are uniformly distributed on the surfaces of the polymer nanofibers; and the zirconium hydroxide nanosheet is in a zigzag form. The preparation method comprises the following steps: dissolving a high-molecular polymer in a solvent to prepare a high-molecular polymer solution; adding a zirconium source and an electrostatic spinning precursor solution; and injecting the mixture into an injector for electrostatic spinning to obtain a hybrid nanofiber membrane with uniform fiber diameter, infiltrating the hybrid nanofiber membrane with ammonia water, and heating for reaction. The preparation process is simple, environmentally friendly and energy-saving; the prepared super-soft self-supporting zirconium hydroxide nanosheet/nanofiber composite membrane has a hierarchical pore structure, super-strong moisture permeability and super-high air permeability, and has very strong adsorption and degradation capabilities on erosive chemical warfare agents and simulants thereof, and neurological chemical warfare agents and simulants thereof.

Zirconium hydroxide nanosheet/nanofiber composite membrane and preparation method thereof

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Owner:DONGHUA UNIV

Substrate with super-absorbent material, method for manufacture thereof and use

InactiveUS6946189B2Layered productsInsulated cablesSuper absorbentPolymer solution

The invention relates to a substrate provided with super-absorbent material to be manufactured by allowing suitable monomers to polymerize in the presence of a catalyst in order to obtain a polymer solution, adding a cross-linking agent to the polymer solution to obtain a pasty composition, subsequently applying the composition on or in a substrate and allowing the applied composition to dry and cross-link in order to obtain the substrate with the super-absorbent material. The pasty composition further contains other additives. The invention further relates to a method for manufacturing such a substrate. The substrates can be used as sheathing material in cables, in hygiene products such as baby napkins, sanitary towels and incontinence products, in or as packagings and packaging materials and in agricultural substrates. The invention also relates to such products.

Substrate with super-absorbent material, method for manufacture thereof and use

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Owner:EVONIK DEGUSSA GMBH

Profile control and plug removal integrated operation system and method for polymer flooding and injection well

PendingCN114810002AAvoid secondary damageIncrease the amount of suction and deblocking working fluidCleaning apparatusFluid removalWater floodingIntegrated operations

The invention discloses a profile control and plug removal integrated operation system and method for a polymer flooding and injection well, and belongs to the technical field of profile control and plug removal of a polymer injection well in the petroleum drilling and production technology. The method comprises the following steps: manufacturing an artificial high-permeability core and a low-permeability core, evacuating saturated water and saturated oil from the high-permeability core and the low-permeability core, connecting the high-permeability core and the low-permeability core in parallel to form a model for simulating intra-layer and inter-layer heterogeneity of an oil reservoir, performing constant-speed water flooding, injecting a polymer solution into the parallel model at a constant speed, and performing subsequent water flooding until the water content is 90%; the calcium chloride, the spacer fluid and the sodium silicate solution are alternately injected into the parallel model for multiple rounds under constant pressure P profile control, and contact and react in the high-permeability layer to finally generate the silicate gel profile control agent; according to constant-pressure P plug removal, plug removal working liquid is injected into the parallel models, and the models are closed for 12-36 h; and injecting water into the parallel model under the constant-pressure P follow-up water drive, and performing follow-up water drive until the water content reaches 90%.

Owner:CNOOC TIANJIN BRANCH

Hydrophobicity regulation and control method of alkaline polyelectrolyte fuel cell catalyst layer

InactiveCN111740118AHigh absolute performanceImprove water managementCell electrodesPolyelectrolytePtru catalyst

The invention discloses a hydrophobicity regulation and control method of an alkaline polyelectrolyte fuel cell catalyst layer. The method comprises the following steps of firstly, synthesizing a series of fluorine-containing alkaline polyelectrolytes, and dissolving and dispersing the fluorine-containing alkaline polyelectrolytes in an organic solvent (such as dimethyl sulfoxide) to prepare a polymer solution with a certain concentration; then adding the hydrophobic polymer solution and the common polymer solution into the catalyst dispersion solution according to different volume ratios (thehydrophobic polymer solution can be completely used), and carrying out uniform ultrasonic dispersion to prepare catalyst ink; finally, spraying uniformly dispersed catalyst ink on the alkaline membrane, removing the solvent by heating in the spraying process, and placing the alkaline membrane with the catalyst layer between the gas diffusion layers to form a membrane electrode. The method is characterized in that the hydrophilicity and hydrophobicity of the catalyst layer can be adjusted by adding the hydrophobic polymer solution in proportion, the hydrophobic polyelectrolyte is located in athree-phase reaction interface, and the hydrophilicity and hydrophobicity of reaction active sites of the catalyst layer can be accurately adjusted and controlled without introducing the extra electrode components.

Owner:WUHAN UNIV

10 results about "Polymer solution" patented technology

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