摘要:
A method for concentration of fine particles dispersed in a dispersion into an ionic liquid comprising, adding an ionic liquid, especially an organic ionic liquid at ordinary temperature, e.g., a salt of 1-butyl-3-methylimidazolium with PF6− to a dilute dispersion of fine particles so as to concentrate the fine particles into the ionic liquid.
摘要:
A method of concentrating nanoparticles, having the steps of: adding and mixing an extraction solvent with a nanoparticles-dispersion liquid that nanoparticles are dispersed in a dispersion solvent, thereby concentrating and extracting the nanoparticles into a phase of the extraction solvent, and removing the dispersion solvent by filter-filtrating a liquid of concentrated extract, in which the extraction solvent is substantially incompatible with the dispersion solvent, and the extract solvent can form an interface after the extraction solvent is mixed with the dispersion solvent and left the mixture still; further a method of deaggregating aggregated nanoparticles, having the steps of: applying two or more ultrasonic waves different in frequency to a liquid containing aggregated nanoparticles, and thereby fining and dispersing the aggregated nanoparticles.
摘要:
The present invention relates to a method of preparing solid particulates and solid particulates prepared by using the method. The method of preparing solid particulates includes dissolving an organic or inorganic compound in a first solvent to provide an organic or inorganic compound-included solution, dispersing the organic or inorganic compound-included solution in a second solvent to provide an emulsion, and concentrating the emulsion in a dispersing medium to precipitate the organic or inorganic compound as solid particulates to provide a dispersion including the solid particulates. The first solvent is an organic solvent or an aqueous solvent, and the second solvent is an organic solvent or an aqueous solvent that is not compatible with the first solvent. It is possible to prepare solid particulates from a wide range of organic or inorganic compounds in accordance with the present invention, and in addition, it is possible to prepare a dispersion including organic or inorganic compound particulates in a high concentration. Therefore, according to the method of the present invention, the solid particulates can be mass-produced.
摘要:
A rewritable photomemory material obtained by combining a polymer possessing a carbonyl group in a main chain or a side chain with a function-imparting component such as a compound which produces rare earth ions is disclosed. The magnitude of fluorescence level of the rewritable phtomemory material can be intensified by light irradiation, while an initial state can be recovered by a heat treatment. Fine particle materials imparted with functions such as fluorescence characteristics, magnetic characteristics, coloration or non-linear characteristics are also disclosed, and particularly a fine particle material imparted with heat resistance through combination with polyimide is disclosed.
摘要:
The process for producing highly concentrated nanometer-size fine particles of an organic pigment, which comprises dissolving the organic pigment in an amide solvent, especially an organic solvent comprising at least 50 vol % 1-methyl-2-pyrrodinone, and pouring the resultant organic pigment solution with stirring into a poor solvent which is not compatible with the organic pigment. The pigment may be a quinacridone pigment, phthalocyanine pigment etc. Any atmospheric pressure to a sub-critical and/or supercritical state can be employed as the production conditions.
摘要:
Disclosed herein are polydiphenyldiacetylenes having the following repeating unit (III): ##STR1## (wherein R.sup.1 denotes a hydrogen atom or a methoxy group; R.sup.2 denotes a hydrogen atom, a methoxy group or a methylamino group; R.sup.3 denotes a hydrogen atom or a trifluoromethyl group; and R.sup.4 denotes a hydrogen atom or a trifluoromethyl group; provided that R.sup.1 is not a hydrogen atom when R.sup.2 is hydrogen atom, and R.sup.3 is not a hydrogen atom when R.sup.4 is hydrogen atom).
摘要翻译:本文公开了具有以下重复单元(III)的聚二苯基二乙炔:其中,R 1表示氢原子或甲氧基; R 2表示氢原子,甲氧基或甲基氨基; R 3表示氢原子 或三氟甲基; R 4表示氢原子或三氟甲基;条件是当R 2为氢原子时,R 1不为氢原子,当R 4为氢原子时,R 3不为氢原子)。
摘要:
A method for preparation of inorganic fine particle-organic crystal hybrid fine particle comprising; pouring an organic material having π-conjugated bond as a water soluble solution into aqueous dispersion in which inorganic fine particles of 50 nm or less selected from the compound group consisting of metal fine particles, semi-conductor fine particles, fine particles of inorganic fluorescent material and fine particle of inorganic luminescent material, are dispersed, co-precipitating said inorganic fine particle which forms a core into said organic material which forms a shell in said dispersion and forming shell of fine crystal of said organic material on the surface of the core of said inorganic fine particles of 50 nm or less by controlling the size of said inorganic fine particle and by controlling the adding amount of said organic material.
摘要:
A method of concentrating nanoparticles, having the steps of: adding and mixing an extraction solvent with a nanoparticles-dispersion liquid that nanoparticles are dispersed in a dispersion solvent, thereby concentrating and extracting the nanoparticles into a phase of the extraction solvent, and removing the dispersion solvent by filter-filtrating a liquid of concentrated extract, in which the extraction solvent is substantially incompatible with the dispersion solvent, and the extract solvent can form an interface after the extraction solvent is mixed with the dispersion solvent and left the mixture still; further a method of deaggregating aggregated nanoparticles, having the steps of: applying two or more ultrasonic waves different in frequency to a liquid containing aggregated nanoparticles, and thereby fining and dispersing the aggregated nanoparticles.
摘要:
[Problem] The purpose of the present invention is to provide organic particles containing pharmaceutical particles of which the particles are small and the particle size distribution is narrow, and a manufacturing method for the same.[Solution] Provided are pharmaceutical multimeric particles of which the particles are small and the particle size distribution is narrow and which are characterized in being obtained by pouring into water a solution of a pharmaceutical multimer dissolved in a water-miscible organic solvent, and a manufacturing method for the pharmaceutical multimeric particles. Pharmaceutical dimeric particles thereof are characterized in being obtained by pouring into water a solution of a compound represented by general formula (I) dissolved in a water-miscible organic solvent.
摘要:
A method for preparation of porous polyimide microparticles comprising, forming polyamide acid microparticles by pouring polymer solution prepared by dissolving polyamide acid containing 0.5 to 80 weight % of alkali metal salt to polyamide acid by 0.1 to 15 weight % concentration into a poor solvent selected from the group consisting of aliphatic solvents, alicyclic solvents, aromatic solvents, CS2 and mixture of two or more these solvents and the temperature of which is adjusted to the range from −20° C. to 60° C., wherein particle size of said polyamide acid microparticles is adjusted to 50 nm to 10000 nm by controlling the temperature of said poor solvent, pore size of said polyamide acid microparticles is adjusted to the range from 20 nm to 500 nm and porosity of said polyamide acid microparticles is adjusted to the range from 0.1% to 30% by controlling a content or a kind of said alkali metal salt, then treating said polyamide acid microparticles by chemical imidation or thermal imidation, or by thermal imidation after chemical imidation so that the particle size distribution, pore size and porosity of said polyamide acid microparticles can be maintained.