135 results about "Dispersity" patented technology

The invention discloses a self-healing concrete intelligent preparation method and system based on a dynamic optimization algorithm. The method comprises the following steps: S1, feeding: feeding materials to a premixing module by a raw material bin and a repairing agent carrier storage bin; s2, premixing: monitoring the water content of the aggregate fed into the raw material bin in real time by a premixing module, and dynamically adjusting the rotating speed of the premixing module through the water content; s3, gradient stirring: after premixing, feeding the materials into a gradient stirring module, and sequentially stirring; s31, firstly entering a low-speed paddle for stirring, monitoring the stirring resistance moment and the slurry viscosity distribution in real time, and dynamically adjusting the rotating speed of the paddle according to the torque-viscosity relationship; s32, performing ultrasonic homogenization on the materials subjected to low-speed stirring, monitoring the dispersity of each substance in low-speed stirring in real time through an identification camera, calculating the concentration gradient, monitoring the particle size distribution of a carrier at a discharge port of an ultrasonic homogenizer to obtain the particle size of a target aggregate, and dynamically adjusting the ultrasonic frequency according to the particle size of the target aggregate to obtain the target aggregate. And dynamically adjusting ultrasonic power and action time according to the concentration gradient.

The invention belongs to the technical field of high polymer materials, and relates to a negative OC photoresist with low residual stress and high refractive index as well as a preparation method and application of the negative OC photoresist. The negative photoresist with the high refractive index at least comprises the following raw materials in parts by weight: 10-22 parts of nanoparticles with the high refractive index, 2-3 parts of an epoxy monomer, 3-10 parts of acrylic resin, 1-3 parts of an acrylic monomer, 1.5-4 parts of a photoinitiator, 0-4 parts of a photosensitizer, 0.01-0.5 part of a surfactant, 0-2 parts of a curing agent and 30-70 parts of a solvent. According to the invention, the epoxy monomer (spiro orthocarbonate compound) is added in the formula to form stable interaction with the nanoparticles, so that the dispersity of the nanoparticles in a polymer matrix is improved, and the overall performance of the photoresist is optimized.

A micron-sized speckle preparation method for quasi-in-situ OIM-DIC mesoscopic strain field analysis comprises the following steps: (1) polishing the surface of a sample to be detected to obtain a bright and scratch-free mirror surface; (2) preparing Si powder turbid liquid; (3) dipping speckles of a sample to be detected in the Si powder turbid liquid to obtain micron-sized speckles; and (4) observing and shooting speckle morphology, and if Si particles are uniformly distributed and dispersed, applying the Si particles to quasi-in-situ OIM-DIC mesoscopic strain field analysis. The method is simple, convenient and rapid, low in operation and construction cost, high in practicability, good in particle dispersity, high in precision, more suitable for calculation of a quasi-in-situ OIM-DIC mesoscopic strain field, controllable in preparation process, low in cost and free of damage to the surface of a sample, the definition and stability of speckle characteristics are remarkably improved, DIC mesoscopic micron-scale operation under a quasi-in-situ OIM mechanical test can be effectively achieved, and the method is suitable for large-scale industrial production. And the grain and mesoscopic strain field information is successfully coupled.

The invention belongs to the technical field of ethanol recovery, and relates to a preparation method of a tubular ceramic carrier-based C-ZIF-67 derived nano-porous carbon doped PDMS mixed matrix membrane and an application of the membrane in recovery of ethanol by pervaporation of a low-concentration ethanol aqueous solution. Comprising the following steps: synthesizing a ZIF-67 crystal, and carbonizing the ZIF-67 crystal to obtain C-ZIF-67 filler particles; the ZIF-67-derived nano-porous carbon particles are prepared through a high-temperature calcination method, the particles are fully carbonized at a certain calcination temperature, disappearance of characteristic groups after carbonization can reduce the influence of surface electrical properties of the particles, and the size shrinkage of the particles is reduced, so that the dispersity of the particles in a matrix membrane is improved; meanwhile, the MOF skeleton structure is still reserved after carbonization, the pore diameter is increased, the carbon material also has strong hydrophobicity, the hydrophobic large-pore-diameter separation pore channels are more beneficial to passing of ethanol molecules and promotion of the separation effect, the separation factor and the total flux are almost kept unchanged after long-time operation and use, and excellent performance is shown; good application prospects are realized.

The invention discloses micron-sized spherical gold powder and a preparation method and application thereof, and belongs to the technical field of metal powder.The gold powder is synthesized through a two-step method, firstly, the pH of a gold salt solution is adjusted to 7-9 and 3-5, the gold salt solution is mixed with a dispersing agent solution and a reducing agent solution, and a precursor solution is obtained; and secondly, the precursor solution is mixed with a gold salt solution, the pH is adjusted to 3-5, then the precursor solution is mixed with a dispersing agent solution and a reducing agent solution, micron-sized spherical gold powder is obtained, the gold powder is appropriate in particle size, spherical in surface appearance, uniform in particle size distribution, good in dispersity and free of the agglomeration phenomenon, and when the gold powder is applied to preparation of the conductive paste, the performance of the conductive paste can be effectively improved.

The invention discloses an emulsion type collecting agent prepared on the basis of an oil-water two-phase emulsifier phase composition transformation method and a preparation method and application of the emulsion type collecting agent, and the emulsion type collecting agent with the total mass fraction of 100 is prepared from 20-40 parts of an oily collecting agent, 1-5 parts of a W / O emulsifier, 4-10 parts of an O / W emulsifier and a plurality of parts of water. When the emulsion type collecting agent is prepared, the HLB value of a system can be accurately controlled by adjusting the mass ratio of the W / O emulsifier to the O / W emulsifier, the phase transformation process from W / O emulsion to bicontinuous phase and O / W emulsion is achieved, and then the emulsion type collecting agent with excellent performance is prepared. The average particle size of the emulsion type collecting agent is about 0.5 mu m, compared with a traditional oily collecting agent, the emulsion type collecting agent is better in dispersity, smaller in particle size and larger in specific surface area, the collision and adhesion probability of the collecting agent and particles is remarkably increased, and the low-rank coal interface hydrophobic modification effect and the flotation recovery rate are improved.

The present invention is a resist composition containing a hypervalent iodine compound, a carboxy-group-containing polymer, and a solvent, where the carboxy-group-containing polymer includes a repeating unit of a carboxylic acid derivative, represented by the following formula (1), and the polymer has a dispersity Mw / Mn of 1.30 or less, where Mw is a weight-average molecular weight and Mn is a number-average molecular weight measured by gel permeation chromatography. This can provide: a non-chemically amplified resist composition excellent in sensitivity and limiting resolution in photolithography using a high-energy beam; a laminate including the resist composition; a patterning process using the resist composition; and a method for manufacturing the resist composition.

The invention relates to the field of inorganic material preparation, and provides a bismuth hydroxide material and a preparation method thereof. The bismuth hydroxide is sphere-like nano-particles with the particle size of 85-175 nm, the dispersity is good, and the purity exceeds 99.8%. The preparation method comprises the following steps: preparing a micelle solution from a polyethylene glycol-polylactic acid (PEG-PLA) block copolymer, adding bismuth salt into the micelle solution, carrying out a reaction, and carrying out centrifugation, washing and vacuum drying to obtain the product. Due to the unique amphipathy of the PEG-PLA micelle, bismuth ions are uniformly distributed, and the uniformity of particles is improved; the hydrophilic chain segment forms steric hindrance to inhibit particle aggregation; meanwhile, the reaction rate is slowed down, and high-concentration ammonia water is combined to ensure high purity of the product. The method overcomes the problems of uneven particle size and agglomeration in traditional preparation.

To provide a chemically amplified positive resist composition that can give a resist film which has extremely high isolated space resolution, small LER, excellent rectangularity, and on which formation of a resist pattern with suppressed etching resistance or pattern collapse is possible, and a resist pattern forming method using the chemically amplified positive resist composition.SOLUTION: A chemically amplified positive resist composition contains: (A) a base polymer which includes a repeating unit derived from hydroxystyrene or hydroxynaphthalene and a repeating unit derived from hydroxystyrene in which a hydroxy group is protected by acid-labile group or hydroxynaphthalene in which a hydroxy group is protected by acid-labile group, and in which dissolubility to alkali aqueous solution increases by acid action, and a dispersion degree is 1.0 to 1.19; (B) photo-acid generator expressed by the following formula (B); and (C) organic solvent.SELECTED DRAWING: None

The invention discloses vinyl MQ silicon resin with high dispersibility and low thermal weight loss and a preparation method thereof, and the preparation method comprises the following steps: (1) mixing and stirring water, an organic solvent, a catalyst and an end-capping reagent for 30 min, then heating to 60-75 DEG C, and reacting for 0.5-1.5 h; (2) cooling to 30-45 DEG C, dropwise adding 100 parts of tetraethoxysilane into the mixed solution for 0.5-1 hour, and continuously keeping the temperature at 30-45 DEG C to react for 0.5-1 hour after dropwise adding is completed; (3) raising the temperature to 60-80 DEG C, and continuously reacting for 4-6 hours; (4) adding alkali for neutralization after the reaction is finished, adding an extracting agent for extraction after the neutralization is finished, separating liquid, and washing to be neutral; (5) gradually heating the washed neutral mixture to 120 DEG C, and removing residual water; and heating to 150 DEG C, and removing the solvent in vacuum to obtain the powdery silicon resin. By controlling the temperature of different reaction stages, the hydrolysis rate and the polycondensation rate of different reactants are controlled, and the dispersity and the thermal stability of the final product are improved; the product is high in hydrolytic condensation degree, low in final alkoxy and hydroxyl content and suitable for reinforcement of addition type liquid glue.

The invention discloses a preparation method and an evaluation method of a high-stability ferric oxide / graphene nano composite material, and relates to the technical field of nano materials. The preparation method comprises the following steps: dissolving expanded graphite in DMF (Dimethyl Formamide), standing for one night, carrying out ultrasonic treatment on a mixture in an ice bath environment for 2.5-3 hours, and adding water to prepare a multi-layer graphene solution; respectively weighing FeCl3. 4H2O and anhydrous sodium acetate, adding the FeCl3. 4H2O and the anhydrous sodium acetate into the multilayer graphene solution, and violently stirring to obtain a reaction precursor solution; carrying out heat preservation on the reaction precursor solution in a water bath, cooling to room temperature, and carrying out high-speed centrifugal separation to obtain a wet sample; and washing the wet sample with absolute ethyl alcohol and purified water, and drying to obtain reddish brown powder. The Fe2O3 particles are loaded on the graphene, the two-dimensional lamellar structure, high thermal conductivity and high dispersity of the graphene can effectively prevent agglomeration of the nano particles, uniform distribution of the particles is guaranteed, the stability of the nano material in an aqueous solution is improved, the light absorption capacity of the nano material is improved, and the performance of the material in photothermal conversion is more stable.

The invention discloses a polyaluminum chloride-based flocculant as well as a preparation method and application thereof, belongs to the technical field of preparation of flocculants, and aims at solving the technical problem that the flocculation performance and the stability of a flocculant in the prior art need to be further improved. The surface charges of iron-based particles are adjusted through sodium citrate, so that the problem of particle agglomeration is effectively avoided, the coating uniformity of microgel is improved, and the specific surface area of the material is increased; abundant cation sites are introduced into the trimethylamine modified chitosan, so that the electrostatic adsorption capacity of the microgel on anion pollutants is remarkably enhanced, and meanwhile, the electrical property and the stability of a system are improved; the addition of sodium metasilicate further promotes the modified PAC to form a stable Al-O-Si bridging structure, the material is endowed with good three-dimensional skeleton strength and composite interface stability, the three components cooperate with each other and play key roles in particle dispersity, charge construction and skeleton stability, and finally, an efficient, stable and storable composite flocculation system is constructed.

The invention relates to the technical field of release film materials, in particular to a bimodal nano-system anti-bonding master batch for an MLCC (multilayer ceramic capacitor) base film and a preparation method of the bimodal nano-system anti-bonding master batch. The anti-bonding master batch comprises the following components in parts by weight: 85-98 parts of thermoplastic resin; 1 to 15 parts of a modified inorganic nanoparticle complex; 0.1 to 1 part of an auxiliary agent; the modified inorganic nanoparticle complex is prepared from the following raw materials: a silane coupling agent and an inorganic nanoparticle complex; the inorganic nano particle complex comprises SiO2 and Al2O3, and the inorganic nano particle complex comprises SiO2 and Al2O3; the particle size of the inorganic nano particle complex is 50 to 500 nm. The technical problems that inorganic nanoparticles are poor in dispersity and easy to agglomerate in PET resin are solved through a bimodal nanoparticle compounding and surface modification technology, the surface of the MLCC release film is endowed with ultralow roughness, and the comprehensive performance of an MLCC product is remarkably improved.

The invention discloses a confinement assembly method of a superstructure magnetic material and a product, the method comprises the following steps: mixing natural plant saccharides, long-chain charged supermolecules and an HCl solution for reaction, and calcining to obtain carbon cluster particles; then under the action of long-chain charged supramolecules, Fe < 3 + > covers the surfaces of carbon cluster particles, a spherical upper-layer structure, namely a carbon material containing Fe < 3 + >, is assembled, and the carbon material containing Fe < 3 + > is subjected to secondary calcination to obtain a magnetic carbon spherical upper-layer structure, namely a superstructure magnetic material; the superstructure magnetic material prepared by the confinement assembly method has the characteristics of high reflection loss, low dielectric constant and good uniformity and dispersity, has excellent microwave absorption capability and radar cross section attenuation capability, and can be used as a wave-absorbing material.

The invention relates to a composition and method for manufacture of paper, board, tissue or the like. The composition comprises an amphoteric polymer component, which has a weight average molecular weight of at least 600 000 g / mol, preferably at least 1 000 000 g / mol, more preferably at least 2 000 000 g / mol, and at least one synthetic cationic polymer component, which is a copolymer of a polyamidoamine and has a weight average molecular weight ≤550 000 g / mol, preferably ≤500 000 g / mol, more preferably ≤400 000 g / mol and dispersity index more than 15, preferably more than 20, more preferably more than 25.

The invention belongs to the field of conductive slurry, and particularly discloses a method for detecting the dispersity of slurry particles. The detection method comprises the following steps: centrifuging slurry, sampling from the bottom of the slurry, and forming a film on the obtained sample to obtain a test sample film; spraying metal on the surface of the test sample film, and observing the particle size and the number of large particles in the test sample film by adopting a scanning electron microscope; the centrifugation is as follows: the slurry is centrifuged for 3-12 times by adopting a centrifugal force of 500-3000g, and each time is centrifuged for 10s-7min. The large particles are actively enriched to the bottom of the slurry through centrifugation, and then are directly sampled and observed from the bottom, so that the large particles are more easily captured and analyzed. According to the method, the problems that in a traditional method, due to the fact that large particles naturally sink to the bottom in the drying film forming process and are difficult to be effectively observed by an electron microscope, size misjudgment and number missing detection are caused are fundamentally avoided, and therefore more accurate statistics and characterization of the large particles in the slurry are achieved.

The invention provides a preparation method of nano vanadium dioxide. According to the preparation method, a sol-gel method and a micro-scale confinement space reaction are combined, the sol-gel method can realize uniform mixing of raw materials in a liquid phase, a stable sol system is formed through hydrolysis and condensation chemical reactions, and the micro-scale confinement space reaction limits nucleation and growth processes through a micro-nano-scale physical space, so that the micro-scale confinement space reaction is formed. According to the preparation method, the material is subjected to'guiding 'growth, vanadium ion form transformation and ultrafine particle nucleation growth can be realized in one step, preparation of nano powder with given structural characteristics is realized, meanwhile, the phenomenon of product agglomeration is avoided, and the powder prepared by the process method is relatively high in particle size controllability and good in dispersity.

The invention provides a preparation method of rod-like copper powder, and belongs to the field of micro-nano copper powder preparation. The preparation method comprises the steps that a copper salt solution, a dispersing agent and halide ions are mixed to obtain a precursor solution, and the pH value of a reaction system is any one of 8-12; a reducing agent is added into the precursor solution at a preset rate, a reduced copper powder solution is obtained, the pH value of a reaction system is any value in the range of 8-12, and the preset rate is any value in the range of 0.1 mL / min to 3 mL / min; and the reduced copper powder solution is subjected to aftertreatment, and the rod-shaped copper powder is obtained. According to the preparation method, crystals are effectively induced to grow along the specific orientation, the reduction and growth rate is accurately regulated and controlled, and the prepared rod-like copper powder is uniform in morphology, narrow in particle size distribution, good in dispersity and high in purity.

The invention belongs to the field of membrane separation, and particularly relates to a preparation method and application of a porous liquid mixed matrix membrane. By utilizing the characteristic that the pore diameter of the metal organic framework can be adjusted, various ionic liquids are coated in the hydroxyl zirconium metal framework, then the polyether amine is grafted on the surface of the hydroxyl zirconium metal organic framework in a covalent grafting manner, the steric hindrance on the surface of the metal organic framework is increased by utilizing the polyether amine, the agglomeration of nano particles is reduced, and the pore diameter of the metal organic framework can be adjusted. The dispersity in a polymer matrix is improved; the obtained mixed matrix membrane not only contains the selectivity advantages of the metal organic framework, the ionic liquid and the polyether amine on carbon dioxide, but also further improves the permeability of the membrane on carbon dioxide molecules.

The application relates to the technical field of nanomaterials, and discloses monodisperse nanometer carbonate and a preparation method and application thereof. The method for preparing the monodisperse nanometer carbonate comprises the following steps: (1) performing acid-base neutralization reaction on a calcium source and / or a magnesium source and a surfactant in the presence of an organic solvent; wherein the calcium source is an alkaline calcium source, the magnesium source is an alkaline magnesium source, and the surfactant is an organic acid; (2) mixing water with the product obtained through the acid-base neutralization reaction in step (1); (3) performing first carbonization reaction on the mixture obtained through step (2) and a carbon source a; (4) performing second carbonization reaction on the product obtained through the first carbonization reaction and a carbon source b; wherein the carbon source a is different from the carbon source b. The monodisperse nanometer carbonate particles disclosed by the application are small in particle size, 1-5 nm in size, small in particle size, uniform in particle size distribution, monodisperse, and good in dispersity.

The present invention discloses a method for measuring the dispersion degree of powder materials, which is characterized in that: a dispersion liquid is prepared from the powder materials as the medium for buoyancy measurement, the buoyancy change of the float in the medium is measured, the dispersion force of the dispersion liquid medium is calculated, and the dispersion degree of the powder materials is obtained. The technical solution of the present invention can be applied to the measurement of the dispersion degree of powder materials, including titanium dioxide, clay, kaolin, calcium carbonate, diatomite, silicon dioxide, carbon black, white carbon black, etc. The measurement device has a low cost, the measurement method is simple, the measurement accuracy is high, and continuous and uninterrupted measurement can be achieved to obtain the continuous change value of the dispersion degree of the powder materials over time. The dispersion degree values of the powder materials at different positions in the dispersion system can also be measured simultaneously.

The invention discloses a preparation method and application of a high-dispersity cationic nano sheet covalent organic framework material based on quaternary ammonium salinization. The method comprises the following steps: firstly, successfully synthesizing COF powder by adopting an amino monomer (such as 2, 4, 6-tris (4-aminophenyl)-1, 3, 5-triazine (TAPT) and the like) and an aldehyde monomer (such as 2, 5-dihydroxy terephthalaldehyde (DHTA)) through Schiff base reaction, and then carrying out a reaction on the COF powder and a quaternary ammonium salinization reagent (such as 3-chloro-2-hydroxypropyltrimethyl ammonium chloride (CHPTAC)) to obtain a quaternary ammonium salt product. According to the preparation method, a cationic nano-sheet-shaped COF material with good dispersibility is prepared by taking a reaction in an alkaline solution for quaternization modification and combining with an ultrasonic method, and the nano-sheet is a nano-sheet-shaped cationic polyelectrolyte material with a nano-sheet layer structure and high charge characteristics, is expected to be applied to fiber flocculation and complex water treatment, and has a wide application prospect. And a new scheme is provided for sewage treatment in papermaking industry and chemical industry.

The preparation method comprises the following steps: firstly, adding PEG (Polyethylene Glycol) which accounts for 3% of the mass of an industrial byproduct magnesium chloride solution as a dispersing agent into the industrial byproduct magnesium chloride solution, stirring and dissolving under the ultrasonic action to obtain a mixed solution, then carrying out ultrasonic precipitation reaction, and carrying out ultrasonic precipitation reaction on the mixed solution at constant temperature to obtain the flame-retardant grade magnesium hydroxide. The preparation method comprises the following steps: under the combined action of stirring and ultrasound, dropwise adding ammonia water to carry out a precipitation reaction, then standing and curing the reacted slurry at a constant temperature, and finally carrying out solid-liquid separation, washing, drying and grinding to obtain a flame-retardant grade magnesium hydroxide product, the XRD pattern of the product is consistent with the characteristic diffraction peak of a standard magnesium hydroxide diffraction pattern, the diffraction peak is sharp and has no impurity peak, and the flame-retardant grade magnesium hydroxide product is obtained. The particle size D90 is less than or equal to 1.5 mu m, and the morphology is an irregular sheet structure which is uniformly dispersed. According to the invention, the industrial byproduct magnesium chloride is used as a raw material to prepare the flame-retardant grade magnesium hydroxide with high purity, superfine particle size and good dispersity, and high-valued utilization of the byproduct magnesium chloride is realized.

The invention discloses nano magnetic powder with high dispersity and uniform particle size and a preparation method of the nano magnetic powder, and belongs to the technical field of powder material preparation and treatment. According to the invention, the dispersion medium, the dispersing agent and the wetting agent are added into the nano magnetic powder, so that efficient dispersion of the nano magnetic powder can be realized; meanwhile, the ultrahigh-pressure jet flow homogenization treatment is combined, so that soft aggregates can be thoroughly crushed, and the nano magnetic powder is monodispersed; besides, after the coating agent is used for coating, the magnetic effect can be weakened, secondary agglomeration can be prevented, and the stability of the coating slurry and the nano magnetic powder is remarkably improved; the particle size distribution of the powder can be accurately regulated and controlled by further adopting rotational flow grading treatment, and the nano magnetic powder with uniform particle size distribution is obtained; and the whole preparation process flow realizes integration of dispersing, coating, grading and drying, the process flow system is complete, parameters are easy to control, the method is suitable for large-scale continuous production, and the product performance is stable and reliable.

The invention discloses an Al / (NH4) xFeFy metastable intermolecular compound and a preparation method of the Al / (NH4) xFeFy metastable intermolecular compound. The method comprises the following steps: firstly, preparing needle-shaped stacked microsphere (NH4) xFeFy by a solvothermal method, and then compounding nano aluminum powder (n-Al) with (NH4) xFeFy in an ultrasonic-assisted dispersion manner to form an Al / (NH4) xFeFy metastable intermolecular compound with good dispersity. (NH4) xFeFy is stimulated to release HF and NH3 gaseous products, the HF gaseous products etch a passivation layer, the NH3 gaseous products provide kinetic energy for fuel, a large number of hot spots are formed, and secondary combustion is triggered. And the combustion performance is explored through combustion experiments in an open environment and a closed environment. Compared with a typical Al / FeF3 metastable state intermolecular compound, Al / (NH4) xFeFy has the remarkable advantages of being low in reaction starting temperature, high in heat release enthalpy, large in flame area, high in F release capacity and the like, and the combustion efficiency of the aluminum powder is greatly improved. The Al / (NH4) xFeFy metastable intermolecular compound has great application value in the fields of gas generators, propellants and combustion bombs.

The invention relates to the technical field of optical material preparation, and provides a polymerizable liquid crystal compound, a polymerizable composition and a phase difference film, a steric hindrance substituent group is introduced to a proper position of a short axis of the polymerizable liquid crystal compound, and the compound shows excellent reverse wavelength dispersity after film forming. Besides, steric hindrance substituent groups are introduced into proper positions of the molecular structure of the polymerizable liquid crystal compound, so that the structural regularity is destroyed, and the compound shows excellent solubility. A phase difference film produced using the polymerizable liquid crystal compound is not susceptible to crystallization and alignment defects.

The invention discloses a research method of dope-dyed anti-ultraviolet chinlon 66. The research method comprises the following steps: coloring by an oxidation modification method; coloring by a coating modification method; coloring by a grafting modification method; and PA66 stock solution coloring CIELAB color brightness value comparison is carried out. According to the research method, the carbon black is subjected to surface treatment through oxidation modification, coating modification and grafting modification, and the influence of the modification method and process on the surface performance and the dispersing performance of the carbon black is researched; then, the modified carbon black is dispersed in a PA66 matrix through solvent volatilization, high-temperature and high-pressure solution prepolymerization-melting final polymerization and solid-phase polymerization, and the influence of carbon black particle surface modification and PA66 coloring modes on the compatibility and dispersity of the carbon black particles in the PA66 matrix is researched; the relationship between the mass fraction of the modified carbon black and the surface morphology, thermal performance, crystallization performance and CIELAB color brightness value of the PA66 film is explored. The high-quality nano carbon black is expected to be provided for coloring the PA66 fiber stock solution.

The invention discloses a color master batch dispersibility detection method based on a rheology principle. The method comprises the following steps: S1, preparing a polymer melt test sample containing a color master batch to be detected and a standard sample with good dispersibility; s2, using a capillary rheometer to obtain the total pressure drop when the sample flows through the capillary; s3, determining inlet pressure drop of the to-be-detected sample and the standard sample; s4, on the basis of the difference between the inlet pressure drop of the to-be-tested sample and the inlet pressure drop of the standard sample, calculating a dispersity index for quantitatively evaluating the dispersion degree of the to-be-tested color master batch. According to the invention, the color master batch dispersibility is improved from qualitative description to quantitative evaluation, and the reproducibility, comparability and high sensitivity of the detection method are ensured.

The invention discloses sedimentation-free and agglomeration-free nano-diamond slurry and a preparation method and application thereof.The sedimentation-free and agglomeration-free nano-diamond slurry is composed of a component A and a component B. The weight percentage of the component A to the component B is 80-95 wt%: 5-20 wt%, the component A is prepared from, by weight, 20-50 wt% of a first organic solvent, 20-50 wt% of a silane coupling agent, 5-20 wt% of a dispersing agent, 5-20 wt% of a permeation promoter and 5-20 wt% of nano-diamond powder, and the component B is prepared from, by weight, 20-50 wt% of a second organic solvent, 5-20 wt% of the content of the silane coupling agent is 2-5 wt%, the content of the dispersing agent is 5-20 wt%, the content of the permeation promoter is 3-10 wt%, the content of the nano diamond powder is 15-70 wt%, and the permeation promoter is selected from at least one of pure Fe powder, pure Co powder, 2% of pure Cr powder and pure CeO2 powder; the component B is prepared from the following raw materials in percentage by weight: 60 to 80 percent of second organic solvent, 10 to 20 percent of resin and 10 to 20 percent of corresponding curing agent. The dispersity and stability of the nano-diamond powder are remarkably improved; the slurry viscosity is optimized, and a simple dip-coating process is realized; a thick hardened infiltrated layer is formed, and the steel hardness is remarkably improved; the process is simple, economical and environment-friendly; and universality and expandability are realized.

The purpose of the present invention is to provide a novel material which exhibits good alkali solubility when irradiated with a high-energy ray and which can be used as a resist material. A novel material according to the present invention is a branched organopolysiloxane which is represented by an average unit formula (1), has a weight-average molecular weight of 2,000 or less, has a polydispersity of 1.30 or less, and has, in the molecule, a hydrophilic group protected by an acid-decomposable functional group: (R3SiO1 / 2) a (R2SiO2 / 2) b (RSiO3 / 2) c (SiO4 / 2) d (O1 / 2Z) e (1), r is a group selected from a monovalent hydrocarbon group or the like and a hydrophilic group protected by an acid-decomposable functional group, and a, b, c, d and e are numbers satisfying the following conditions: 0 < = a, 0 < = b, 0.8 < = c, 0 < = d, 0 < = e, and a + b + c + d = 1).