72 results about "Smart polymer" patented technology

Polymeric nanoparticles with a hydrophobic core and a hydrophilic shell are formed from: 1) N-isopropyl acrylamide (NIPAAM), at a molar ratio of about 50% to about 90%, and preferably 60% for specific delivery routes such as oral or parenteral; either water-soluble vinyl derivatives like vinylpyrolidone (VP) or vinyl acetate (VA), or water insoluble vinyl derivatives like methyl methacrylate (MMA) or styrene (ST), at a molar ratio of about 10% to about 30%; and acrylic acid (AA), at a molar ratio of about 10% to about 30%. The formed nanoparticles may be optionally surface functionalized using reactive groups present in AA, including PEGylation, or conjugation of moieties such as chemotherapeutics, contrasting agents, antibodies, radionucleides, ligands, and sugars, for diagnostic, therapeutic, and imaging purposes. The polymeric nanoparticles are preferably dispersed in aqueous solutions. The polymeric nanoparticles incorporate one or more types of medicines or bioactive agents in the hydrophobic core; on occasion, the medicine or bioactive agent may be conjugated to the nanoparticle surface via reactive functional groups. The polymeric nanoparticles are capable of delivering the said medicines or bioactive agents through oral, parenteral, or topical routes. The polymeric nanoparticles allow poorly water soluble medicines or bioactive agents, or those with poor oral bioavailability, to be formulated in an aqueous solution, and enable their convenient delivery into the systemic circulation.

A controlled release pharmaceutical composition comprises (a) at least one pharmaceutically active substance having a water contact angle (θ) such that cos θ is between +0.9848 and −0.9848, (b) a first intelligent polymer component; and (c) a second intelligent polymer component having opposite wettability characteristics to the first intelligent polymer component, the first and second polymer components being present in a ratio in the range of about 1:100 to about 100:1 by weight. The polymer components are effective for controlled release of the pharmaceutically active substance from the composition.

The name of the invention is conformance control through Stimulus-presponsive materials. The present invention describes 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 first 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.

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 viscous composition for transdermal drug delivery, a method of preparing the same, and a microstructure device prepared using the viscous composition are provided. Here, the viscous composition includes colloidal particles formed of a combination of a drug and a biodegradable polymer, and the biodegradable polymer includes a first amphiphilic polymer. The use of a solvent can be minimized to homogenize the drug in the biodegradable polymer including the first amphiphilic polymer, thereby forming colloidal particles. Therefore, since a separate solvent cannot be used, the microstructure device is expected to be a transdermal drug delivery system which is safe, efficient or useful for drugs which do not include a proper solvent, show poor bioavailability or have a high molecular weight.

The present invention corresponds to a method for the removal of unwanted phenolic compounds from foodstuffs, more particularly beverages. The method comprising contacting a selected polymer with the foodstuff. In a particular embodiment, the polymers are selected among polyaniline (PANI), polyaniline emeraldine base (PANI-EB) and polyaniline emeraldine salt (PANI-ES) polymers, or the polymers are selected among polyamidoamine (PAMAM) dendrimers functionalized with polyaniline (PANI), polyaniline emeraldine base (PANI-EB) and polyaniline emeraldine salt (PANI-ES) polymers.

The invention relates to a carbon heating waistband and a preparation method thereof. The waistband comprises a lumbar support, a patch pocket, an elastic band, a fibula, a battery bag, a carbon heating piece, a connecting lead, and an intelligent polymer lithium battery; a warp direction static wire in the carbon heating piece adopts the parallel connection mode, and then is connected with the positive set and the negative set of the lithium battery; the elastic band is connected with the two ends of the waistband; the fibula is respectively connected with the two ends of the elastic band; the lumbar support are weaved by three layers of textile fabrics and forms two patch pockets; the internal layer patch pocket is close to the waist of human body, made of knitting fishnet and used for putting the heating element; the outer layer is made of woven fabric and used for putting flexible synthetic glass thin material according to the requirements; the battery bag is arranged at one end of the elastic band and can be adjusted according to the requirements. The waistband has the advantages of quick heating and warming, being odourless and pollution-free, good effect, and is an ideal heat supplying and insulation waistband.

The invention belongs to the technical field of flexible intelligent driving materials and particularly relates to a phototropic shape memory polymer material integrating photo-response and temperature response and preparation and application methods thereof. The phototropic shape memory polymer material is a polyurethane elastomer material in a double-crosslinked net structure and is prepared bytaking polycaprolactone diol as a chain extender, tetrahydroxy functionalized hexaaryl biimidazole molecular switches as dynamic crosslinking points and polyols as fixed crosslinking points to performcrosslinking reaction with isocyanate. The phototropic shape memory polymer material can present rapid deformation response under ultraviolet radiation and temperature driving to achieve good phototropic properties and is reversible in deformation under temperature driving, thereby solving the technical problem that intelligent photo-driven materials can achieve driving effects only when the thickness is reduced to a micron scale or are slow in driving response, irreversible or the like.