71 results about "Smart polymer" patented technology

An extended release dosage composition of pharmaceutically active substances that have a water contact angle (θ) such that cos θ is between +0.9848 and −0.9848 presented as a matrix tablet containing the said pharmaceutically active substances, with/without suitable pharmaceutical excipients in intimate mixture with two groups of intelligent polymers having opposing wettability characteristics, one demonstrating a stronger tendency towards hydrophobicity and the other a stronger tendency towards hydrophilicity, the polymer combination being between the ratios of 1:50 and 50:1 amounts effective to control the release of said pharmaceutically active substances in a mathematically predictable manner, wherein the polymer demonstrating a stronger tendency towards hydrophobicity is not less than 5% wt/wt and preferably between 5-70% wt/wt of the final formulation composition. The intelligent polymers being ethylcellulose (EC) as a more strongly hydrophobic and hydroxyethylcellulose (HEC) and/or hydroxypropyl methylcellulose (HPMC) as more strongly hydrophilic (the ratio of HEC to HPMC being between 1:100 and 100:1). The matrix tablet is optionally coated with an enteric coat, 0-5%-15% wt/wt to prevent the initial burst effect seen in such systems and to impart gastrointestinal tract (GIT) “stealth” characteristics especially in the presence of food.

A controlled release pharmaceutical composition comprises (a) topiramate or a pharmaceutically acceptable salt thereof, (b) a first intelligent polymer component; and (c) a second intelligent polymer component having opposite wettability characteristics to the first intelligent polymer component. The polymer components are effective for controlled release of the pharmaceutically active substance from the composition.

A method, apparatus and production well system that utilize stimulus-responsive materials for “conformance control” and profile control along the fluid flow path in a well as part of a gravel pack or a coating on a well tool. The stimulus-responsive materials are also known as intelligent or smart polymers and are typically polymeric materials that reversibly or irreversibly swell or collapse in the presence of stimulus such as changes in concentration of a fluid media in contact with the stimulus-responsive material, pH or polarity of the media the stimulus-responsive material is in contact with, salinity, current; or temperature. The stimulus-responsive materials may swell upon contact with a rust stimulus and shrink or collapse upon contact with a second stimulus or vice-versa The changes between production and injection profiles may be automatic with the application of the stimulus-responsive materials and may occur without user intervention.

Design and preparation of a smart system, including a hydrophilic polymer nanoparticle as a core material and a hydrophilic-hydrophobic block copolymer as a coating nanolayer for use in a smart core-shell nanostructure flooding during enhanced oil recovery (EOR) process. The hydrophilic polymers are prepared by an inverse emulsion method. The central core of this nanostructure includes hydrophilic polymer. The nanolayer can be a surfmer. The binary properties of the shell and hydrophilic polymers increase the water viscosity in the water-oil interface and enhance oil recovery.

The current invention is a novel superparamagnetic site-targeting nanoparticle comprising superparamagnetic nanoparticles encapsulated with a smart polymer. The superparamagnetic site-targeting nanoparticle comprises a functionalized superparamagnetic core that is conjugated with a therapeutic agent and then encapsulated with a smart polymer. The smart polymer can be any polymer that exhibits a reversible conformational or physio-chemical change in response to an external stimulus or stimuli.

A smart polymer molded hybrid shipping container generally refers to large intermodal shipping container and their manufacture, and more particularly to a recyclable rotationally-molded RF (radio frequency) transparent thermoplastic polymer shell with a removable outer structural fabricated steel load bearing support frame capable of being integrated with an internally mounted geo-location detection system, date transmission communication devices, inner environmental sensors, data storage system, and power storage system. The smart polymer molded hybrid shipping container is designed to be 100% recyclable after useful life with a mechanically fastened exoskeleton steel frame that can be reused in the post manufacturing process. The smart polymer molded hybrid shipping container has a one piece molded shell with load bearing molded in floor system and outer polymer skin that is entirely weather resistant and non-corrosive.

Various embodiments of the present invention are directed to switchable carboxybetaine-based polymers, hydrogels, and/or elastomers, along with novel related monomers, crosslinkers, and methods. Under acidic conditions, the materials undergo self-cyclization and can catch and kill bacteria. Under neutral/basic conditions, these materials undergo ring-opening and can release killed bacterial cells and resist protein adsorption and bacterial attachment. These smart polymers, hydrogels and elastomers also show excellent mechanical properties making them highly desirable for many biomedical applications.

The invention discloses a polymer nanometer blocking agent for water-based drilling fluid and its preparation method, and belongs to the technical field of a drilling fluid function material. The polymer nanometer blocking agent for water-based drilling fluid is prepared from, by weight, 4-16 parts of emulgator, 2-14 parts of temperature sensitive monomer, 10-53 parts of hydrophilic monomer, 0.5-10 parts of hydrophobic monomer and 0.05-0.5 part of initiator. The polymer nanometer blocking agent is small in size, and can block micro and nano-sized holes of a shale well wall; through compressivedeformation property of the poymer, the compact blocking of the well wall hole can be realized; by means of the temperature response property of an intelligent polymer, the transformation from hydrophilia to hydrophobicity is realized in the well wall, and the zone closing to the well wall is transformed to be a hydrophobic environment, thus the diffusion and permeation of water in the water-based dirlling fluid towards the shale well wall is effectively stopped, thereby stabilizing the well wall and protecting reservoir, and providing an important technical guarantee for the development of the water-based drilling fluid system for shale development.

The present invention provides a porous hollow silica micro- or nanoparticle with a polymer grafted thereon, wherein the polymer is selected from poly(methacrylic acid) and copolymers thereof. The polymer may be covalently linked to the silica particle via a bridging group. Provided is also a method of covalently coupling a poly(methacrylic acid) to a silica surface of a hollow silica particle. The method comprises contacting a silica surface of a hollow silica particle that carries amino functional or halogen functional groups with a poly(methacrylic acid) or a copolymer or a respective monomer thereof. The method further comprises allowing the carboxyl group of the monomer or the poly(methacrylic acid) and an amino functional group or a halogen functional group on the silica surface to undergo a coupling reaction, thereby covalently coupling the polymer to the silica surface.

The invention provides a preparation method of an intelligent polymer composite. The preparation method includes the steps that functionalized graphene is uniformly dispersed in an anhydrous polar organic solvent, isocyanate-terminated polyurethane with a diene synthesis reaction is added, a reaction is carried out for 4-10 h at 50-100 DEG C, and the intelligent polymer composite is obtained. Functionalized graphene is connected to a polymer material with covalent bonds, the effect of uniform dispersion is achieved, and the strength of the polymer is improved; meanwhile, the optothermal conversion property of graphene is utilized, infrared light serves as a stimulus, and the effect of directional fixed-point repair is achieved.

An ultra-low voltage microfluidic device for manipulating droplets of liquid by inducing Marangoni stress therein includes a plurality of smart-polymer electrodes having films of smart polymer exposed at their surfaces. The surface of the smart polymer becomes hydrophobic or hydrophilic in response to different electromagnetic potentials. The smart polymer is reversibly oxidized by applying an electrical potential such that the smart polymer acquires a positive electrical charge. The oxidized smart polymer is reduced by applying an electrical potential such that it loses its positive electrical charge. The smart polymer is doped with a chemical compound having a negatively-charged end and a long-chain hydrophobic tail. The smart polymer is a polypyrrole and the dopant is a dodecylbenzene sulfonate. The microfluidic device includes a plurality of individually-addressable control electrodes, each of which is electrically-connected with smart-polymer electrodes. Droplets are transported, cut, or mixed by selectively applying electrical potential to individual electrodes.

The invention discloses an intelligent high-safety lithium-on battery with a polymer skeleton. The intelligent high-safety lithium-on battery comprises a positive electrode, a negative electrode, a membrane and an electrolyte, wherein the positive electrode, the negative electrode and the membrane all contain positive-temperature temperature-sensitive polymer particles; the lithium-on battery can be reversibly converted between a ''liquid lithium-on battery'' and a ''polymer lithium-on battery'' within different temperature ranges; the electrolyte in the ''liquid lithium-on battery'' exists in a form of a liquid electrolyte; and the electrolyte in the ''polymer lithium-on battery'' exists in a form of a polymer electrolyte. The lithium-on battery disclosed by the invention is quickly converted into the ''polymer lithium-on battery'' when the temperature suddenly rises, and does not contain the liquid electrolyte, so that an unstable solid-liquid interface can be removed and the interface stability of the battery can be effectively improved; and by adopting the polymer skeleton, the positive electrode, the negative electrode and the membrane of the battery are tightly connected, and the stability of the battery structure can be improved, so that the lithium-on battery can show good cycling stability and excellent electrochemical properties at different temperatures and is suitable for various complicated environments.

The invention relates to a carbon heating scarf and a preparation method thereof. The carbon heating scarf is characterized by comprising a base cloth, a carbon heating sheet, agraffes, connecting wires and intelligent polymer lithium battery pack; the carbon heating sheet is compounded by pressing and rolling carbon conductive fabric with a environment friendly polyurethane thin film or vinyl acetate thin film, and sewn and packed by nano bamboo charcoal knitted fabric; the carbon heating sheet is connected with the intelligent polymer lithium battery pack and a thin film regulating switch in series by the connecting wires to form a circuit; the agraffes are respectively sewn in the middle part of the base cloth of the scarf and on one side of the nano bamboo charcoal fabric of the carbon heating sheet so as to bond each other. The scarf has the advantages of fast heating and temperature rise, no odor, no pollution and good heat preservation effect, and the scarf is an ideal warm scarf with heat supply function.

The present invention provides a conjugate of tenofovir, addy adefovir and intelligent polymers, a method for preparing the same, and an usage. The invention relates to the technical field that antiviral medicinal molecular tenofovir and addy adefovir are chemical modified, namely, phosphate group of tenofovir or addy adefovir is linked with X group, then X group is linked with intelligent polymers R, or phosphate group of tenofovir or addy adefovir is linked with intelligent polymers R with X function group, and a conjugate of tenofovir, addy adefovir and intelligent polymers with A-X-R-Y formula is formed. The modified tenofovir and addy adefovir forms efficient screen for raw medicine, and improves obviously medicine absorption of intestinal and absorption of cell, improves bioavailability of medicine, at the same time, reduces the kidney cleaning of medicine, and reduces the toxic for kidney, improves security.

A system and a method for adaptively releasing a lubricant or a cosmetic for a razor cartridge, a sensing unit detects a property of at least one of skin, air, water and a chemical agent in a region adjacent to the razor cartridge. A smart polymer provided on the razor cartridge is selectively responsive to a characteristic external stimulus by undergoing a physical or chemical change. A processing unit controls the release of the lubricant or the cosmetic by providing the characteristic external stimulus to cause the smart polymer to undergo a change. The processing unit compares the detected property to a reference threshold parameter and determines whether to provide the characteristic external stimulus to the smart polymer based on the comparison, thereby generating the lubricant or the cosmetic. The determined level of depletion of the smart polymer is indicated by a light, aural, or haptic indication.

The invention relates to a lactose-based intelligent polymer and application thereof. The lactose-based intelligent polymer is prepared by grafting aldehyde group of a lactose functional monomer to a main chain of a poly-amino polymer; the poly-amino polymer comprises a mixture of one or more of polyacrylamide, polyethyleneimine, poly-asparagine, polyamide, aminoethyl polymethacrylate, polyamide-amine and aminopropyl polymethacrylate. Polymer film material prepared from the lactose polymer is capable of responding to sialic acid adsorption and desorption dynamically and irreversibly, thereby exhibiting great change in the materials properties, such as surface wettability, hardness, and viscous force. These materials characteristics can promote the application of materials in the recognition and detection of sialic acid. Therefore, by grafting the lactose-based intelligent polymer to a porous inorganic medium, a chromatographic separation material is acquired which is capable of separating glycopeptides different in sugar chain structure, particularly sialoglycopeptide.

The invention discloses a photo-thermal patterned self-reinforced polymer material and a preparation method thereof, and belongs to the technical field of self-reinforced polymer materials. The photo-thermal patterned self-reinforced polymer material comprises the following raw materials: a monomer with a polymerized side chain containing an ester bond, an initiator, a photo-thermal conversion filler, an ester exchange reaction catalyst and a cross-linking agent. According to the present invention, the self-crosslinking polymerization reaction and the ester exchange reaction under the thermalor illumination condition are performed to obtain the polymer material capable of locally achieving the patterning self-enhancement, such that the same material has two different properties so as to meet the intelligent requirement on the material; and the preparation method of the polymer material is simple and easy to operate, the intelligent polymer material with different hardness degrees andspecific patterns can be obtained at the same time, practicability is high, and wide application prospects are achieved.

A microfluidic movement control method utilizing light, a device, and a microtubule actuator (2). The microtubule actuator (2) is prepared by utilizing a light-induced deformed smart polymer material. The smart polymer material forms, by an exciting beam, asymmetrical deformation, and is induced to produce a capillary action to drive a microfluid movement. The embodiment can drive microfluids having various polarities and compositions, and can drive creep of the microfluid, and can even drive the microfluid to generate a 3D movement trail. The embodiment has found a wide range of potential applications in controllable microfluidic transport, micro-reaction systems, micro-mechanic systems, IC laboratories, and others.

The invention discloses an intelligent elastic bearing and a control method. The intelligent elastic bearing comprises an intelligent polymer material layer, a metal spacer layer and two joints, wherein one joint is used for connecting blades, and the other joint is used for connecting a propeller hub; and an external electric field or magnetic field is applied to the intelligent polymer materiallayer. According to the elastic bearing, a rubber material overlapped with a metal layer in a traditional elastic bearing is changed into an intelligent polymer material, and the novel elastic bearingwith the metal layer and the intelligent polymer material layer overlapped with each other is formed. Compared with a traditional elastic bearing made of a rubber material, in the working process ofa helicopter rotor system, the performance of the bearing can be controlled to be changed by changing physical parameters such as the external electric field and the magnetic field, and therefore active or semi-active vibration reduction of the helicopter rotor system is achieved.