49 results about "Crystal growth inhibition" patented technology

The invention discloses a lignin based polyoxyethylene ether, a preparation method and application thereof. The preparation method comprises the steps of: heating and fusing polyethylene glycol, adding catalysts, then slowly adding epichlorohydrin in a dropwise manner to undergo reaction, thus obtaining a modified polyethylene glycol intermediate; heating alkali lignin to 60-80DEG C, and adding the modified polyethylene glycol intermediate dropwise to undergo reaction, thus obtaining the lignin based polyoxyethylene ether. The preparation method provided by the invention is carried out under normal pressure and low temperature, and is easy to operate and control. Due to direct introduction of a polyoxyethylene ether hydrophilic group into an alkali lignin molecule through grafting reaction, the side reaction is fewer, and the damage to the lignin structure is very small. Only two-step reaction is needed, and the reaction time is short. The product has good water solubility, is environmental friendly and non-toxic. The lignin based polyoxyethylene ether provided by the invention can be used as a dispersing agent of a pesticide suspension individually, and has the advantages of excellent dispersion and viscosity reduction performance, crystal growth inhibition, and high heat storage suspension rate.

A sapphire substrate having one principal surface on which a nitride semiconductor is grown, said one principal surface having a plurality of projections. Each of the projections has a generally pyramidal shape with a not truncated, more sharpened tip and with an inclined surface composed of a crystal growth-suppression surface that lessens or suppresses the growth of the nitride semiconductor and also which has an inclination change line at which an inclination angle discontinuously varies.

The present invention relates to a stable pharmaceutical composition comprising soft gelatin capsules containing at least one sparingly soluble active drug (singly or in combination with sparingly soluble and / or soluble drugs) and a solvent system, wherein the solvent system comprises of solvent, co-solvent, solubilizer(s), surfactant, aqueous solution of alkali and crystal growth inhibitor. The present invention further relates to process for preparing a stable pharmaceutical composition of sparingly soluble active drug(s) in soft gelatin capsules.

The invention provides a method for protecting metal negative electrode by double-layered membrane, relates to the field of lithium metal electrode protection materials and in particular relates to the method for protecting metal negative electrode by double-layered membrane, aiming at solving the problems that an existing lithium dendritic crystal growth inhibition method is lack of safety, the interface resistance is great, the growth of lithium dendritic crystals cannot be eliminated radically and the technical tedious difficulty is relatively great and the like. The method comprises the following steps: 1, preparing an outer-layer protection composite thin membrane; 2, preparing a double-layered protected metal electrode. According to the method provided by the invention, the dendriticcrystals can be effectively eliminated by a nano powder layer and a composite thin membrane layer can be used for preventing the dendritic crystals from piercing, so that the safety and stability ofa battery are improved; the whole body resistance value of an obtained ZnO / (PVDF-HFP)-ZnO double-layered protected lithium metal symmetrical battery is reduced by 80 percent to 97 percent when being compared with that of an unprotected lithium metal symmetrical battery. The lithium metal electrode modified by a double-layered protection material has the advantages that the stability is remarkablyimproved and the lithium dendritic crystals are effectively inhibited. The method for protecting metal negative electrode by double-layered membrane is applied to the fields of preparation and modification of the lithium metal electrodes.

A method for preparing pure rutile-phase titanium dioxide single crystalline nanorod without template in low temperature relates to a method for preparing rutile-phase titanium dioxide single crystalline nanorod. The invention settles a problem that the requirements of high-temperature treatment and additionally adding of template agent or crystal growing inhibitor existing in the prior method for preparing rutile-phase titanium dioxide crystalline nanorod. The method comprises the following steps: 1. adding the precursor of titanium into alcohol for preparing solution; 2. dripping the solution into distilled water, mixing after adding the alkaline solution; 3. centrifugating for obtaining precipitate after mixing, washing the precipitate; 4. after dissolving the washed precipitate into the acid solution, mixing for obtaining slurry liquid; and 5. after centrifugating the slurry liquid, obtaining the pure rutile-phase titanium dioxide single crystalline nanorod. The method for preparing pure rutile-phase titanium dioxide single crystalline nanorod is executed in normal pressure and low temperature and has no requirement for adding any template agent or crystal growth inhibitor. The product of the invention has the advantages of high crystallinity degree, good dispersibility, bigger specific surface area and surface hydroxylation degree, and stable photocatalysis characteristic.

Provided are a magnetic transducer and a thin film magnetic head having good thermal stability and capable of obtaining a high exchange coupling magnetic field, a method of manufacturing a magnetic transducer and a method of a manufacturing a thin film magnetic head. An MR element has a stack having a stacked structure comprising an underlayer, a crystal-growth inhibitor layer, a first soft magnetic layer, a second soft magnetic layer, a nonmagnetic layer, a ferromagnetic layer, an antiferromagnetic layer and a cap layer, which are stacked in sequence. The ferromagnetic layer has an inner ferromagnetic layer, a coupling layer and an outer ferromagnetic layer, which are stacked in this order on the nonmagnetic layer. The crystal-growth inhibitor layer inhibits crystal growth of the layers formed on the crystal-growth inhibitor layer, thereby limiting an average in-surface particle diameter of the inner ferromagnetic layer to within the range of from 3 nm to 8 nm inclusive, so that an interface between the coupling layer and the inner ferromagnetic layer becomes flattened.

The invention discloses a method for preparing carbon-coated spherical nano lithium iron phosphate by a liquid phase method. According to the method, a lithium iron phosphate powder body with an olivine structure is quickly produced in a normal pressure liquid phase, the nano lithium iron phosphate powder obtained by the reaction is mixed with an organic carbon source such as glucose, the resultant product can be carbonized and spherized at high temperature within a very short time under the protection of inert atmosphere to obtain the carbon-coated spherical nano lithium iron phosphate with a small and uniform particle size, and the particle size range is 50nm to 300nm. The technical scheme of the invention is as follows: a certain-concentration mixed aqueous solution of ferrous salt and phosphoric acid is prepared with an equimolar ratio, and is placed in a reactor, a high-boiling-point polar organic solvent such as dimethyl sulfoxide and crystal growth inhibitor, such as polyacrylamide, of 0.5-3% are added, and the volume ratio of the aqueous solution to the high-boiling-point polar organic solvent is 0.5-2:1; under stirring, a lithium hydroxide solution with a certain concentration is added slowly until the pH value of a reaction solution is 6 to 7, and then the solution is heated to the boiling point, and reacts under reflux for 0.5 to 3h; the product is conventionally filtered, washed, and dried in a vacuum to obtain a nano-lithium iron phosphate powder body; and then the generated nano-lithium iron phosphate powder and the organic carbon source such as the glucose are mixed and placed in a high-temperature furnace in which inert gas is introduced to be used as protective gas, and under the condition that the temperature is controlled between 500 and 700 DEG C, the resultant product is crystallized and spheroidized for 1 to 5h, and is cooled and then pulverized to obtain the product provided by the invention. The product provided by the invention is used for a cathode material of lithium-ion batteries.

The invention discloses a method for preparing a copper(I)-based catalyst used for synthesizing an organic silicon monomer, and belongs to the technical field of chemical engineering. The method comprises the following steps of: (1) dissolving copper (II) salt in a solution A; (2) adding a crystal growth inhibitor, fully stirring, adding an aldehyde group, alcohol group or alcoholic sugar group containing substance serving as a reducing agent, and transferring feed liquor into a pressure-resistant corrosion-resistant reaction kettle; (3) sealing the kettle, heating to the temperature of between 50 and 300DEG C, and ensuring the reaction time is 0.5 to 48 hours; and (4) cooling and filtering the obtained precipitate, and washing and drying by using the conventional method to obtain the regular-shaped target product of copper(I)-based catalyst. The preparation process is simple, is easy to control, and has no harmful gas and waste liquor emission. When the prepared copper(I)-based catalyst is used for synthesizing the organic silicon monomer, the selectivity of the product and the conversion rate of silicon powder can be effectively improved.

The present invention provides an aqueous suspoemulsion comprising (a) an oil phase comprising (i) at least one triazole active compound as emulsified component, solid at room temperature, (ii) at least one alkyl carboxylic acid amide as a solvent and a crystal growth inhibitor, and (iii) a polymeric stabilizer, and (b) a continuous water phase comprising (i) at least one strobilurin active compound as suspended solid component, solid at room temperature, (ii) at least one dispersant selected from the group consisting of methacrylic acid-methyl methacrylate-polyethyleneglycol graft copolymer, tristyrylphenolethoxylates and / or propylene oxide / ethylene oxide block copolymer with 10% to 50% EO, preferably with 20% to 50% EO and most preferably with 30% to 40% EO, (iii) water, and (iiii) additives, if appropriate. a process for preparing the suspoemulsion and its use for applying the active compounds comprised therein to plants and / or their habitat are also provided.

The invention provides a three-dimensional inorganic polymer composite solid electrolyte and a ternary solid-state lithium battery. The composite solid electrolyte is formed by casting and coating electrolyte slurry on a polyimide porous membrane. The electrolyte slurry comprises a polymer, nano ceramic powder and lithium salt, and the electrolyte slurry permeates into the polyimide porous membrane to form the solid electrolyte in a three-dimensional structure. According to the invention, the polyimide porous membrane is used as a base material film; the electrolyte slurry containing the nanoceramic powder and the polymer is coated through tape casting, so that the slurry fully permeates into the polyimide porous membrane to form the composite solid electrolyte in the three-dimensional skeleton structure, and the performance parameters of the composite solid electrolyte are controllable; the mechanical properties of the composite solid electrolyte are greatly improved; the lithium dendritic crystal growth inhibition capability is enhanced; the cycle stability of the battery can be improved; and the cycle life is prolonged; and in addition, the preparation process of the three-dimensional inorganic polymer composite solid electrolyte is simple and convenient.

[Technical Problem]A sapphire substrate and a method for manufacturing the same are provided, which enables growth of a nitride semiconductor having excellent crystallinity and can achieve a nitride semiconductor light emitting element having excellent light extraction efficiency.[Solution to Problem]A sapphire substrate provided with a plurality of projections on a principal surface on which a nitride semiconductor is grown to form a nitride semiconductor light emitting element, wherein the projection is substantially pyramidal-shaped having a pointed top and constituted by a plurality of side surfaces, wherein the side surface has an inclined angle of between 53° and 59° from a bottom surface of the projection, and wherein the side surface is crystal-growth-suppressed surface on which growth of nitride semiconductor is suppressed relative to the substrate surface located between the adjacent projections.

A sapphire substrate provided with a plurality of projections on a principal surface on which a nitride semiconductor is grown to form a nitride semiconductor light emitting element. The projections have a substantially triangular pyramidal-shape the projections having a plurality of side surfaces and a pointed top. The side surfaces have an inclination angle of between 53° and 59° from a bottom of the projections. The side surfaces are crystal-growth suppressed surfaces on which a growth of the nitride semiconductor is suppressed relative to a portion of the principal surface located between adjacent projections. A bottom of the projections has a substantially triangular shape having three outwardly curved arc-shaped sides, and each of the side surfaces has a substantially triangular shape having vertexes located at the top of the projection and at both ends of a respective side of the bottom of the projection.

The invention discloses a nano-flake Silicalite-1 molecular sieve with a macroporous-microporous composite porous structure and a synthesis method of the nano-flake Silicalite-1 molecular sieve. The molecular sieve is of an MFI topological structure and is a nano-flake molecular sieve with a relatively short b axis in morphology; a crystal is internally embedded with abundant macropores, and the thickness of the nanoflake and the pore size of the macropores both can be regulated in a relatively wide range. The synthesis method of the nano-flake Silicalite-1 molecular sieve is characterized inthat the Silicalite-1 molecular sieve with the macroporous-microporous composite porous structure is prepared by taking urea, organic amine or inorganic alkali and ammonium salt impregnated mesoporoussilica as a precursor and utilizing a steam assisted crystallization method. According to the synthesis method, the macropores are constructed without the need of additionally adding a secondary template agent; the precursor is the raw material for synthesizing the molecular sieve and is also a temporary macroporous template agent; meanwhile, the cheap and easily-obtained urea is used as a crystal growth inhibitor; the method is simple and feasible and the synthesis cost is low.

The invention discloses a quasi-solid-state battery pole piece as well as a preparation method and application thereof; and the preparation method comprises the following steps: (1), mixing and sintering an electrode active material and a first powder material so as to enable the first powder material to form a coating layer on the surface of the electrode active material; (2), mixing the productobtained in the (1) with a second powder material, a conductive agent, a first binder and a first solvent to obtain first slurry; (3), coating a current collector with the first slurry, and performingrolling to obtain an initial pole piece; (4), mixing a third powder material, a second binder and a second solvent to obtain a second slurry; and (5), coating at least part of the surface of the initial pole piece with the second slurry to obtain a quasi-solid-state battery pole piece. According to the quasi-solid-state battery pole piece, on the premise of not reducing the rate capability of thebattery, problems of volume expansion / shrinkage, electrolyte wettability, lithium dendritic crystal growth inhibition, electrode interface side reaction and the like in the charging and discharging process of a battery cell are effectively avoided.

The invention relates to a method for preparing a copper-based catalyst. The method includes the following steps: copper (II) salt is dissolved into water-soluble chloride or a mixture of the water-soluble chloride and alkali liquor; after a crystal growth inhibitor is added, matter containing aldehyde groups, alcohol groups or alcohol sugar groups is added with the temperature ranging from 20 DEG C to 40 DEG C, the rotating speed ranging from 500 r / min to 1000 r / min and the stirring time ranging from 30 min to 60 min to serve as a reducing agent, copper-based catalyst carriers are added, feed liquid is transferred to a reaction still after ultrasonic dispersion, the reaction still is then sealed, heating is carried out until the temperature ranges from 50 DEG C to 300 DEG C, and the reaction time ranges from 0.5 h to 48 h; filtering is carried out after cooling is carried out to obtain precipitates, the precipitates are sequentially washed with diluted hydrochloric acid and ethyl alcohol, and the copper-based catalyst regular in shape is obtained after drying is carried out. The method for preparing the copper-based catalyst is simple in preparing technology, easy to control and free of noxious gas and liquid waste discharging, water and energy are saved, the powder with the good copper active component dispersion is directly obtained, and possibly-formed powder hard agglomerates are avoided.

The exhaust gas-purifying catalyst of the invention includes a noble metal, and crystallites that form CZ composite metal particles which serve as a carrier supporting the noble metal and contain at least zirconium (Zr) and cerium (Ce). The CZ composite oxide particles (crystallites) further contain crystal growth-suppressing fine particles which are fine metal particles comprising primarily a metallic element M that melts at 1,500° C. or above and which suppress crystal growth by the CZ composite oxide particles. The content of the metallic element M included in the CZ composite oxide particles, expressed in terms of the oxide thereof, is 0.5 mol % or less of the total oxide.

The invention discloses a lithium metal battery negative electrode current collector capable of inhibiting dendritic crystal growth and a modification method thereof, belongs to the field of lithium battery negative electrode dendritic crystal growth inhibition, and aims to reduce the generation of lithium dendrites and the formation of dead lithium and improve the coulombic efficiency and the cycle life of a lithium metal negative electrode by performing corresponding treatment on a Cu current collector. The surface of the current collector is modified with a layer of PES film through a spin-coating method, the PES film contains a large number of polar functional groups O = S = O, and in the lithium deposition process, the polar functional groups can induce uniform nucleation of lithium ions, so that growth of lithium dendrites is inhibited; meanwhile, wettability of an electrode interface is improved, impedance of a negative electrode and an electrolyte solid-liquid phase interface is reduced, and transmission of interface lithium ions is improved; and the PES high polymer covers the copper foil, so that the direct contact between the electrode and the electrolyte can be prevented, and the consumption of the electrolyte in the circulation process is prevented.

The invention discloses a method for preparing nanometer lithium iron phosphate in liquid phase, which is characterized in that: reaction can be quickly completed in normal-pressure liquid phase, the synthesized lithium iron phosphate powder has small and homogenous particle size, and the particle size is 50nm to 400nm. The invention adopts a technical scheme that: ferrite and phosphoric acid mixed aqueous solution with a given concentration is prepared according to an equivalent mol ratio, the mixed aqueous solution is placed into a reactor, polarity organic solvent with a high boiling point such as dimethylsulfoxide with a volume ratio to the aqueous solution of 0.5 to 2:1 and 0.5 to 3 percent of crystal growth inhibitors such as polyacrylamide are added, lithium hydroxide solution is slowly added during the blending until the pH value of the reaction solution is 6 to 7, then the mixed solution is heated to the boiling point to have refluxing reaction for 0.5 to 3 hours, and products are conventionally filtered, washed and vacuum dried to obtain the nanometer lithium iron phosphate. The product is used as an anode material of a lithium-ion battery.

The disclosure includes tablet cores comprising Sovaprevir and a crystal growth inhibitor selected from hydroxypropyl methyl cellulose (HPMC), HPC (hydroxypropyl cellulose), hypromellose acetate succinate (HPMCAS), polyvinyl pyrrolidone (PVP), copovidone (PVP-VA), a copolymer of methacrylic acid and ethyl acrylate, or any combination of the foregoing, wherein ratio of Sovaprevir to crystal growth inhibitor is from about 40:60 (w / w) to about 60:40 (w / w). The disclosure further includes film coated tables. The disclosure also includes methods of treating HCV with the tablets described herein.

The invention provides methods of modifying the crystal habit of a compound without altering the crystal structure of the compound through a controlled precipitation technique in the presence of a crystal growth inhibitor as well as the crystallized compounds formed by these methods. Using these methods, the crystal habit of the compound may be modified from acicular to bipyramidal. The modification in crystal habit is attributable to a preferential adsorption mechanism of the crystal growth inhibitor to a fast growing crystal face of the compound. Powder flow properties of the crystallized product are significantly enhanced with the habit modification. This selective crystal habit modification using a crystal growth inhibitor provides a strategy to circumvent the manufacturing difficulties associated with acicular crystal habits, and may increase the manufacturing capability of supercritical fluid based crystallization and precipitation technologies.

A water evaporation system includes an evaporation module configured to evaporate water from a brine; a support module attached to the evaporation module and configured to support the evaporation module above the brine; and an inlet configured to add a crystal growth inhibitor to the brine.

The present invention provides a process for producing a colored toner comprising the steps of: providing a polymer composition comprising at least one polymer wherein the at least one polymer has a softening temperature from about 30° C. to about 160° C.; and a colorant; forming an aqueous mineral suspension of at least one multivalent metal phosphate by contacting a water-soluble salt of the multivalent metal with an aqueous solution comprising: a water-soluble phosphate salt; and at least one crystal growth inhibitor which controls the growth of the at least one multivalent metal phosphate, wherein the pH of the aqueous mineral suspension is from 5.5 to 14; and forming a dispersion of the polymer composition by adding the polymer composition to the aqueous mineral suspension under agitation to form a solid portion comprising dispersed particles of the polymer composition, wherein the temperature of the aqueous mineral suspension during the dispersing step is at least about 70° C.

The present invention provides a method of treatment of inflammatory disorder of the eye, said method comprising administering into the eye of a person in need thereof, an aqueous solution comprising difluprednate as the sole active ingredient at a concentration of 0.02% to 0.04% weight by volume in an aqueous vehicle, wherein the solution is free of oil and wherein the solution is administered twice-a-day. The present invention also provides an ophthalmic solution comprising a. therapeutically effective concentration of difluprednate, a crystal growth inhibitor and pharmaceutically acceptable amounts of a solubilizer comprising a mixture of i. quaternary ammonium compound and ii. polyethoxylated castor oil, b. in an aqueous vehicle. wherein the crystal growth inhibitor is polyvinyl alcohol or its derivatives.

The invention discloses a preparation method and application of a porous zeolite adsorbent, and particularly relates to the technical field of zeolite synthesis. According to the invention, solid powder silica gel with high specific surface area is used as a silicon source, sodium hydroxide is used as alkali, potassium fluoride is used as a potassium source, a titanium trichloride solution is used as a titanium source, and methacryloyloxyethyl trimethyl ammonium chloride is used as a crystal growth inhibitor; a supplement is added into the reaction mixture gel, so that the adsorption performance and the photocatalytic treatment performance of the porous zeolite adsorbent can be further enhanced; gel is prepared after mixing, and nano ETS-10 zeolite crystal grains are synthesized through hydrothermal crystallization and assembled to form the porous zeolite adsorbent with high crystallinity, large outer surface area and high mesoporous volume; and the surface of the nanocrystal is subjected to hydrophobic treatment by using a silane reagent (trimethylchlorosilane or hexamethyldisilazane), so that the hydrophobic porous zeolite adsorbent is obtained, and the hydrophobic surface is more beneficial to adsorption of molecules in VOCs.

An inhibitor for crystal growth of fats and oils, containing a polyglycerol fatty acid ester, which is an esterified product formed between a polyglycerol and a fatty acid, the polyglycerol having a hydroxyl value of 850 mg KOH / g or less and a ratio of primary hydroxyl groups to all the hydroxyl groups of the polyglycerol of 50% or more, wherein the polyglycerol fatty acid ester has a hydroxyl value of 100 mg KOH / g or less. Since the inhibitor for crystal growth of fats and oils of the present invention can inhibit crystal growth of fats and oils by adding the inhibitor to fats and oils, storage property of the fats and oils in a refrigerator, cold climates, or the like, so that the inhibitor can be suitably used in liquid fats and oils such as salad oil for which transparency is important.

The present invention provides an ophthalmic solution comprising a. therapeutically effective concentration of difluprednate, a crystal growth inhibitor and pharmaceutically acceptable amounts of a solubilizer comprising a mixture of i. quaternary ammonium compound and ii. polyethoxylated castor oil, b. in an aqueous vehicle. wherein the crystal growth inhibitor is polyvinyl alcohol or its derivatives. Also, the present invention provides a method of treatment of inflammatory disorder of the eye, said method comprising administering into the eye of a person in need thereof, an aqueous solution comprising difluprednate as the sole active ingredient at a concentration of 0.02% to 0.04% weight by volume in an aqueous vehicle, wherein the solution is free of oil and wherein the solution is administered twice-a-day.

An inhibitor for crystal growth of fats and oils, containing a polyglycerol fatty acid ester, which is an esterified product formed between a polyglycerol and a fatty acid, the polyglycerol having a hydroxyl value of 850 mg KOH / g or less and a ratio of primary hydroxyl groups to all the hydroxyl groups of the polyglycerol of 50% or more, wherein the polyglycerol fatty acid ester has a hydroxyl value of 100 mg KOH / g or less. Since the inhibitor for crystal growth of fats and oils of the present invention can inhibit crystal growth of fats and oils by adding the inhibitor to fats and oils, storage property of the fats and oils in a refrigerator, cold climates, or the like, so that the inhibitor can be suitably used in liquid fats and oils such as salad oil for which transparency is important.