31 results about "Sol-Gel Phase Transition" patented technology

The present invention relates to a poly(organophosphazene)-bioactive molecule conjugates in which biodegradable and thermosensitive poly(organophosphazene) with a functional group showing the sol-gel phase transition with change of temperature is combined with various bioactive molecules, such as drugs, a preparation method thereof, and a use thereof for delivery of bioactive molecules.

Through the active-light-ray-curable inkjet white ink according to the present invention, the ink including a pigment, a dispersing agent, a wax, a photopolymerizable compound, and a photopolymerization initiator, and being capable of a sol-gel phase transition by a temperature change, the pigment including titanium dioxide surface-coated with alumina, the content of the titanium dioxide being 10% by mass to 15% by mass of the total mass of the ink, the ink including sodium ions in a mass ratio of 200 ppm or lower with respect to the pigment, and the dispersing agent including a comb-shaped block copolymer having a tertiary amine group, even when titanium dioxide is used as the pigment, the viscosity of the ink can be restrained from increasing, luster equivalent to that of another color is obtained, and clogging of a recording head for ink discharge is reduced.

An inkjet ink set comprising: a color ink including a photocurable compound, a photopolymerization initiator, a gelling agent, and a colorant, the color ink undergoing a sol-gel phase transition depending on the temperature; and a clear ink including a photocurable compound, a photopolymerization initiator, and a gelling agent, the clear ink undergoing a sol-gel phase transition depending on the temperature. The viscosity (η) (CL) of the clear ink at 25° C. is less than ½ the viscosity (η) (CO) of the color ink at 25° C., and the viscosity (η) (CL) of the clear ink is 1×103 mPa·s or greater. Provided is an inkjet ink set by which a printed image offering both high image quality and surface gloss can be formed.

An inkjet recording method comprising: shooting to a recording medium an active-light-ray-curable inkjet ink including a photopolymerizable compound, a wax, a photopolymerization initiator, and a coloring material, and that undergoes reversible sol-gel phase transition relative to temperature; and curing the ink by irradiating an active light ray to the ink that has been shot to the recording medium, wherein the ink including a (meta) acrylate compound (B) having a molecular weight of 300-1500 and a ClogP value within the range 4.0 to 7.0, the wax content being 1.0-10 percent by mass of the total mass of the ink, and the temperature of the recording medium at active light ray irradiation being set such that the saturation solubility of the wax with respect to the ink constitutes 0.5 percent by mass or less. According to this image-forming method, blooming is suppressed.

A fuel cell system of the present invention includes: a fuel cell stack (1) composed by stacking a plurality of single cells, each single cell having: a membrane electrode assembly in which electrode catalyst layers (3) and gas diffusion layers (4) are disposed on both surfaces of an electrolyte membrane (2) formed of a gel electrolyte with a sol-gel phase transition temperature; and separators (5) disposed on both sides of the membrane electrode assembly; and a temperature adjusting apparatus (12) which adjusts a temperature of the electrolyte membrane in the single cell. In such a way, a defect such as a pinhole that has occurred in the electrolyte membrane (2) can be solved.

There is provided in the present invention a composition for inhibiting adhesion comprising polymers that are dissolved in an aqueous solution and have temperature sensitivity showing a sol-gel phase transition dependant upon temperature, wherein the polymer solution in a sol state becomes a gel state by body temperature and is thus stably coated within tissues whereby it functions as a membrane inhibiting adhesion and as time lapses, it is degraded into low molecular weight surfactants and bio-degradable single molecular substances whereby they can be absorbed into body and the degraded products can bring about secondary adhesion inhibiting effects.

The purpose of the present invention is to provide an actinic ray curable inkjet ink which, in an inkjet printing method, is capable of having both high pinning characteristics and high ejection characteristics. In order to achieve the above purpose, this actinic ray curable inkjet ink includes an actinic ray curable compound, ketone wax, and ester wax, and reversibly goes through a sol-gel phase transition depending on the temperature.

The purpose of the present invention is to provide an actinic ray curable inkjet ink which, in an inkjet printing method, is capable of having both high pinning characteristics and high ejection characteristics. In order to achieve the above purpose, this actinic ray curable inkjet ink includes an actinic ray curable compound, ketone wax, and ester wax, and reversibly goes through a sol-gel phase transition depending on the temperature.

The present invention relates to a biodegradable and thermosensitive poly(organophosphazene) with a functional group, a preparation method thereof, and a use thereof for delivery of bioactive substances. According to the present invention, poly(organophosphazene) is a phosphagen-based polymer showing biodegradability, thermosensitivity, and sol-gel phase transition depending on temperature change, whereby when administered into a living body with bioactive substances such as drugs, the poly(organophosphazene) forms a gel-phase at body temperature to be capable of controlled release of the bioactive substances. Further, the poly(organophosphazene) has functional groups to chemically bind with bioactive substances through an ionic bond, covalent bond, or coordinate covalent bond to be capable of a sustained release of the bioactive substances due to its good binding property. Therefore, the poly(organophosphazene) is useful as a delivery material for bioactive substances.

The invention discloses a cellulose composite microsphere, a preparation method thereof and application. The particle size of the cellulose composite microsphere is 1mum-1200mum, the specific surface area of the cellulose composite microsphere is 100m<2> / g-500m<2> / g, and the aperture of the cellulose composite microsphere is 200nm-900nm. The preparation method comprises the following steps of: preparing a mixture solution of cellulose and a composite material by using the cellulose as a matrix, a polymer material as composite material and a water solution of alkali / urea or alkali / thiourea as a solvent, and obtaining the cellulose composite microsphere through sol-gel phase transition and cross-linking agent cross linkage. The advantages of cellulose microsphere are reserved by the cellulose composite microsphere, and due to the adding of the composite material, new functional groups are simultaneously added for the surface of the microsphere and further decoration and modification are facilitated. An organic solvent used in the preparation method disclosed by the invention can be reused, the whole preparation technology is simple, low in time consuming, undemanding for equipment and convenient for industrial production, and the prepared cellulose composite microsphere has a good flow property and mechanical property and a wide application.