236 results about "Porous microspheres" patented technology

The invention belongs to the field of modified self-repairing calcium aluminate cement 3D printing, and particularly relates to a phosphate modified self-repairing calcium aluminate cement 3D printing material and a preparation method thereof. The phosphate modified self-repairing calcium aluminate cement 3D printing material prepared by the invention is prepared from the following raw materials in parts by mass: 60 to 70 parts of calcium aluminate cement, 3 to 7 parts of silica fume, 2 to 4 parts of metakaolin, 0.5 to 3.5 parts of double-template modified calcium bentonite, 0.8 to 1.5 parts of amino modified sodium polyphosphate and 0.15 to 0.8 part of basalt fiber. The invention relates to a concrete anti-microbial agent, which is prepared from the following raw materials in parts by weight: 20-30 parts of water, 20-30 parts of water, 20-30 parts of water, 20-30 parts of nano calcium carbonate, 20-30 parts of nano calcium carbonate, 20-30 parts of magnesium phosphate cement coated bacteria-loaded porous microspheres, 20-30 parts of a polycarboxylate superplasticizer, 20-30 parts of an organic silicon defoaming agent and 25-35 parts of mixing water. The technical-economic cooperation requirement of building 3D printing under complex working conditions is met, and various indexes of phosphate modified calcium aluminate cement applied to the 3D printing technology are met.

The invention discloses a preparation method of a cell inflammatory factor adsorbent, which comprises the following steps: mixing styrene, divinyl benzene and hydroxyethyl acrylate, and adding a pore-foaming agent and mesoporous SiO2 nano powder to prepare a porous microsphere carrier; the preparation method comprises the following steps: mixing chitosan and poly (N-isopropylacrylamide) in an acetic acid solution to obtain a temperature-sensitive chitosan hydrogel precursor solution; the preparation method comprises the following steps: activating the surface of a porous microsphere carrier by using 1-ethyl-(3-dimethylaminopropyl) carbodiimide and N-hydroxysuccinimide, mixing the activated porous microsphere carrier and a temperature-sensitive chitosan hydrogel precursor solution to obtain a water phase, and assembling, washing and drying in an oil phase to obtain the cell inflammatory factor adsorbent. Through the design of the core-shell structure and the addition of the mesoporous SiO2 nano powder, the temperature response characteristic and the recyclable characteristic are given to the cell inflammatory factor adsorbent, the adsorption capacity of cell factors is also improved, and a new solution is provided for physical adsorption of the cell inflammatory factors.

The invention relates to the technical field of catalyst materials, and particularly discloses a high-stability hydrogenation catalyst and a preparation method thereof. The invention relates to a preparation method of a high-stability hydrogenation catalyst, which comprises the following steps: preparing a hollow porous microsphere as an inner core from amino-terminated hyperbranched polyaryletherketone and polyvinyl alcohol, and then coating the porous microsphere with a mesoporous silicon dioxide intermediate layer by a sol-gel method; and finally, forming an Mg-Al hydrotalcite layer on the outermost side through a coprecipitation method, dipping and modifying with La (NO3) 3 and Ce (NO3) 3 solutions to obtain a catalyst carrier, dipping the catalyst carrier in an active metal dipping solution, and drying to obtain the catalyst. The high-stability hydrogenation catalyst provided by the invention has excellent mechanical properties and more reaction active sites, has high catalytic activity and catalytic efficiency, and is relatively long in catalytic life.

The invention discloses an organic wastewater adsorbent as well as a preparation method and application thereof, and belongs to the technical field of sewage treatment. Comprising the following steps: carrying out nitration reaction on styrene porous microsphere resin, and then carrying out reduction reaction to obtain amino-modified porous microsphere resin; the preparation method comprises the following steps: carrying out polymerization reaction on high-nitrogen-content amino organic small molecules and aldehyde group small molecules under the action of a basic catalyst in an adsorption polymerization manner to generate a nitrogen-doped organic porous polymer, and coating the surface of amino-modified porous microsphere resin with the nitrogen-doped organic porous polymer to obtain the organic wastewater adsorbent. The porous microsphere resin adsorbent with large adsorption capacity and high organic matter removal rate is synthesized by using the carrier advantage of styrene microsphere resin and introducing a porous heteroatom polymer on the microsphere resin. When the adsorbent is used, the adsorbent is directly added into an organic wastewater solution, and the removal rate of bisphenol A, aniline and tetracycline can reach 90% or above.

The invention relates to the technical field of floor slab concrete, and discloses aerated concrete applied to sound insulation and heat preservation of a floor slab and a preparation method of the aerated concrete aiming at the problems that an existing sound insulation floor slab containing the aerated concrete is poor in structural stability, namely the sound insulation effect and the long-term effect of mechanical properties are poor and the like. Comprising 30-40 parts of fly ash, 25-35 parts of sand, 15-20 parts of ardealite, 10-15 parts of quick lime, 5-8 parts of silicon-aluminum porous microspheres, 3-5 parts of slaked lime, 1-2 parts of Fe3O4-polypropylene fiber and 0.2-0.5 part of aluminum powder. The preparation method of the silicon-aluminum porous microspheres comprises the following steps: mixing a silicon source, an aluminum source and a surfactant, and uniformly stirring to obtain silicon-aluminum homogenate; and adding nano titanium dioxide, carrying out ultrasonic dispersion and freeze drying, transferring into a heating furnace, and heating and calcining to obtain the silicon-aluminum porous microspheres. The supporting and strengthening effects on pores are realized through gas production reaction and the like in the material, so that the structural strength and durability of the aerated concrete are improved.

The invention provides a porous bio-based polymer microsphere as well as a preparation method and application thereof. The porous bio-based polymer microsphere provided by the invention comprises a mixture of a bio-based high-molecular polymer P1 and a bio-based block copolymer P2, wherein the bio-based block copolymer P2 is a bio-based block copolymer of which the end-capped group at one end is a hydrophilic group and the end-capped group at the other end is a hydrophobic group. The porous microspheres are prepared by adopting a method of combining condensation phase separation, solvent replacement and solvent volatilization, the obtained microspheres are uniform and stable, the pelletizing rate of the microspheres is nearly high, the yield is high, and subsequent screening is not needed; the process is simple, and the difficulty in operation and control of the process caused by introduction of multiple water phases / oil phases is reduced.

The invention provides a high-flux porous microsphere for chromatography and a preparation method thereof, and the preparation method of the high-flux porous microsphere for chromatography comprises the following steps: respectively dissolving agarose and aminated glucan in water, and uniformly mixing an agarose solution and an aminated glucan aqueous solution to obtain an aqueous phase; adding the water phase into the oil phase containing the emulsifier, and stirring and emulsifying at 70-90 DEG C for 30-90 minutes to obtain a mixed solution; cooling the obtained mixed solution to 20 DEG C or below at a speed of 1-5 DEG C / min, and curing into a ball to obtain a microsphere; and adding NHS-PEG-COOH into the obtained microspheres, carrying out a primary cross-linking reaction, adding epoxy chloropropane into the obtained microspheres, and carrying out a secondary cross-linking reaction to obtain the high-flux porous microspheres for chromatography. According to the preparation method of the high-flux porous microspheres for chromatography, the separation efficiency of the obtained porous microspheres can be improved, and relatively high dynamic adsorption capacity can still be realized at a high flow rate.

The invention relates to the technical field of biological materials, in particular to a PDRN porous microsphere as well as a preparation method and application thereof. The PDRN porous microspheres are prepared from the following raw materials: PDRN, an oil phase matrix, a curing agent and metal salt, the curing agent is at least one of polyethylene glycol acrylate and polylysine; the metal salt is at least one of calcium chloride, zinc chloride, magnesium chloride and ferric chloride. The PDRN porous microsphere has the advantages of being controllable in size, excellent in disintegration resistance and excellent in swelling resistance, is high in moist heat sterilization tolerance and strength, can be used as a filling material for medical beauty or an ideal candidate material of a tissue engineering scaffold, and has potential application value.

The invention relates to the technical field of lithium adsorbents, in particular to a preparation and application method of a porous microsphere adsorbent for extracting lithium, and the preparation method comprises the following steps: preparing a water phase solution containing methacrylic acid, water and an emulsifier; the preparation method comprises the following steps: preparing an oil phase solution containing a fluorinated methacrylate monomer containing beta-diketone, cyclohexyl methacrylate, methoxyethyl methacrylate, N, N-bis (acryloyl) cystamine, ethylene glycol dimethacrylate, azodiisobutyronitrile and a solvent; dropwise adding the oil-phase solution into the water-phase solution for gradient emulsification, adding sodium persulfate to initiate polymerization, and performing centrifugal drying to obtain porous microspheres; and immersing the porous microspheres into a NaOH solution for hydrolysis activation, and drying to obtain the porous microsphere adsorbent for selective adsorption of lithium ions. Wherein the beta-diketone can enhance the targeted adsorption effect of the adsorbent on lithium ions and has relatively high selectivity and adsorption capacity, and the strong electron-withdrawing property of CF3 further polarizes carbonyl and enhances the coordination ability of the lithium ions.

The invention discloses a water treatment filtering material and a preparation method thereof, and relates to the technical field of water treatment. When the water treatment filtering material is prepared, alkaline lignin, epichlorohydrin and triethylenetetramine are subjected to a reaction through a reverse suspension cross-linking technology, and lignin porous microspheres are prepared; carrying out reaction on the lignin porous microspheres and picolinamide ligands to obtain modified lignin porous microspheres; 3-mercaptopropyltriethoxysilane and titanium dioxide are subjected to a reaction, and modified titanium dioxide is prepared; the preparation method comprises the following steps: reacting pyromellitic dianhydride, 1, 4-diaminobutylene and 4 ', 4-diaminodiphenyl ether to prepare functionalized polyamide; the functional polyamide, the modified lignin porous microspheres and the modified titanium dioxide are prepared into a spinning solution, and a polyamide membrane is prepared through electrostatic spinning; and carrying out liquid reaction on bromohexane on the polyamide membrane to obtain the water treatment filtering material. The prepared water treatment filtering material has excellent antibacterial property, heavy metal adsorption property, dye removal property and mechanical property.

The invention relates to the field of biological materials, in particular to a preparation method of magnetic microspheres and amino and / or carboxyl magnetic microspheres. The invention provides a preparation method of magnetic microspheres, which comprises the following steps: carrying out first polymerization reaction on styrene in the presence of an initiator to obtain polystyrene seed microspheres; swelling the seed microspheres in the presence of a pore-foaming agent, a monomer and an initiator to generate a second polymerization reaction; extracting and washing to obtain porous microspheres; modifying carboxyl on the inner and outer surfaces of the porous microspheres through a third polymerization reaction, mixing with iron ions, and coprecipitating to obtain the monodisperse superparamagnetic microspheres. The magnetic microspheres provided by the invention have monodispersity and superparamagnetism, and the particle size and the magnetic content of the magnetic microspheres can be regulated and controlled as required; the surface of the microsphere is rich in amino or carboxyl functional groups, and the content range of amino and carboxyl can be regulated and controlled according to the requirements of coupled protein; the method can be widely applied to the fields of in-vitro detection, biomedical research, protein separation and purification, cell sorting and the like.

The application provides a modified hollow porous silica microsphere and a preparation method and application thereof. The preparation method of the modified hollow porous silica microsphere comprises the following steps: S1, mixing a pre-hydrolysis solution of orthosilicate, a pre-hydrolysis solution of alkyl trialkoxysilane, a pre-hydrolysis solution of 1,2-bis(trialkoxysilyl)ethane and a polyol to obtain a mixture, refluxing, removing alcohol and obtaining a prepolymer; S2, mixing the prepolymer obtained in the step S1 with water, emulsifying, adjusting pH to alkaline, aging, filtering and drying, and the modified hollow porous silica microsphere is obtained. The application uses 1,2-bis(trialkoxysilyl)ethane as one of main silicon sources, and uses the mode of pre-hydrolyzing different silanes separately and then mixing and condensing, so that the highly hydrolyzable and polymerizable silane is prevented from being highly hydrolyzed and polymerized and the non-hydrolyzable and polymerizable silane is prevented from being hydrolyzed and polymerized, the preparation process is simple, the raw material cost is low, the porous microspheres obtained have good morphology and high yield, the operation condition is mild, and the application is easy to industrialize.

The invention discloses a PVDF / PFA composite filter material for sewage treatment and a preparation method of the PVDF / PFA composite filter material, and relates to the technical field of water treatment. When the filtering material is prepared, firstly, N-propenylimidazole and 1-chloro-3-phenylpropane react to prepare vinyl imidazolium salt, PVDF subjected to alkali treatment is grafted with the vinyl imidazolium salt, then the PVDF and 5-aza-uracil react, and modified PVDF is obtained; secondly, enabling resorcinol, 3, 5-dihydroxybenzoic acid and formaldehyde to react to obtain porous microspheres, and sulfonating the porous microspheres through chlorosulfonic acid to obtain modified microspheres; finally, PVDF, PFA, polyoxyethylene and the modified microspheres are mixed and subjected to melt spinning, and a fiber membrane is prepared; and carrying out in-situ generation of ferroferric oxide, and activating with hypochlorous acid to obtain the PVDF / PFA composite filter material for sewage treatment. The filter material prepared by the invention has good antibacterial, hydrophilic and photocatalytic degradation properties.

The invention discloses a feed for feeding cordyceps sinensis host hepialus larvae as well as a preparation method and application of the feed, and relates to the technical field of artificial feeds. The feed comprises the following components in parts by weight: 5-20 parts of beer yeast powder and / or casein, 30-80 parts of wheat germ powder, 20-40 parts of carrot powder, 0.2-5 parts of a modified preservative, 0.05-0.2 part of antibiotics, 0.2-5 parts of vitamins, 0.01-1 part of edible oil, 6-15 parts of agar and 200-400 parts of water. The modified preservative is composed of a chitosan oligosaccharide-natamycin compound subjected to plasma activation treatment and potassium sorbate according to the ratio of 1: 3-1: 5; a modified preservative composed of a chitosan oligosaccharide-natamycin compound subjected to plasma activation treatment and potassium sorbate is adopted, a porous microsphere structure is formed through a specific preparation process, and the contact area of the preservative and the feed is greatly increased. Agar and water form a gel matrix at a specific temperature, and nutritional ingredients and the like are injected into a coaxial micro-fluidic device, so that the preservative effect of the feed is remarkably enhanced.

The invention belongs to the technical field of grinding wheel abrasives, and particularly relates to a diamond porous microsphere, a grinding wheel abrasive and a preparation method and application thereof. The preparation raw materials of the diamond porous microspheres comprise mixed powder, a binder and water, the mixed powder comprises a first ceramic bond, diamond and a pore forming agent. The first ceramic bond, the diamond and the pore forming agent are used as raw materials for preparing the diamond porous microspheres, the diamond porous microspheres have natural pores and prefabricated spherical pores, the porosity is high, and the self-sharpening performance of the grinding wheel grinding material can be improved; the grinding wheel abrasive material is prepared through secondary air degreasing sintering of the diamond porous microspheres, a new three-dimensional pore structure is formed among the naturally stacked diamond porous microspheres, the grinding wheel abrasive material with a'natural pore + prefabricated spherical pore + stacked pore 'multi-stage pore structure is obtained, the cooling, lubricating and chip removal effects of a grinding wheel can be greatly improved, and the service life of the grinding wheel is prolonged. Therefore, the grinding performance and the service life of the grinding wheel are improved.

This invention discloses an iontophoresis gel scleral contact lens and its preparation method, comprising a contact lens frame, a polymer porous microsphere drug-carrying layer loaded with nano-sustained-release drugs, an electrode layer, and a flexible material covering the electrode layer on the contact lens frame, and a gel layer covering the outer side of the contact lens frame. This iontophoresis gel scleral contact lens has a simple structure, facilitates convenient and rapid drug delivery, and provides sustained-release efficacy. It allows patients to self-administer the drug, directly delivering it to the intraocular lesion site, avoiding adverse reactions in other tissues or the whole body, and has a sustained-release function to reduce the frequency of drug administration.

The invention relates to the technical field of polycarboxylate superplasticizer modification, in particular to a method for modifying a polycarboxylate superplasticizer through Ti-SiO2 porous microspheres, the modified polycarboxylate superplasticizer and application. The polycarboxylate superplasticizer is modified by adopting the nano Ti-SiO2 porous microspheres, and the modified polycarboxylate superplasticizer effectively reduces the liquid level tension of slurry, increases the spacing of cement particles and releases more free water, so that the viscosity reduction performance of cement slurry is improved, the mechanical property and durability of a hardened cement material are improved, and the strength of concrete is enhanced. The modified polycarboxylate superplasticizer prepared by adopting the method for modifying the polycarboxylate superplasticizer by adopting the nano Ti-SiO2 porous microspheres, provided by the invention, has relatively high water-reducing rate and relatively good workability and viscosity reduction performance, and the mechanical strength and durability are improved.

The invention discloses a method for preparing PDLLA porous microspheres with high porosity and uniform particle size distribution in batches, and belongs to the technical field of polymer biomedical material preparation. According to the method, an ultrasonic-assisted double-emulsification system is combined with an inner water phase (an ammonium bicarbonate solution), an oil phase and an outer water phase (a polyvinyl alcohol solution), and a staged curing process is adopted to realize accurate regulation and control of a pore structure and a particle size. Petroleum ether is introduced as a poor solvent to optimize the precipitation uniformity, ultrasonic and mechanical stirring synergistically improve the emulsification uniformity, and staged curing ensures that the solvent evaporation rate is matched with pore formation. The porosity of the prepared PDLLA microspheres reaches 75%-87%, the SPAN value is as low as 0.512, the pore size distribution is uniform, the process expandability is high, and the method is suitable for the biomedical fields of drug carriers, tissue engineering scaffolds and the like. The technical problems of low porosity, wide particle size distribution and complex process are solved, and the method has a remarkable application prospect.

The invention discloses a preparation method and application of sand control fluid in an outer annular space of an oil-string casing, and belongs to the technical field of oil-gas field development. The preparation method comprises the steps that S1, the perforation aperture of the oil-string casing and the sand grain size and temperature of a sand production oil layer are obtained; s2, uniformly mixing a non-metallic mineral material, pulverized coal and natural organic compound particles, adding water, and roasting to prepare porous microspheres; s3, paraffin is added, and microspheres wrapping the paraffin are prepared; and S4, adding water and cement to prepare a primary sand control fluid, and adding a retarder or an accelerator to enable the primary sand control fluid to meet the set initial setting time to prepare the sand control fluid. After the prepared sand prevention fluid is solidified, the paraffin can be melted and discharged at the oil layer temperature, so that a sand prevention barrier is formed in an annular space outside an oil-string casing, and due to the fact that the microspheres are porous, a wellbore in the casing is communicated with a sand outlet oil layer, oil gas can enter an oil pipe through pores to be normally exploited and produced, and sand grains are isolated outside. The method is suitable for oil layer sand prevention in oil-gas field exploitation.

The present application provides a kind of porous poly-L-lactic acid microspheres, and its preparation method and injection preparation comprising porous poly-L-lactic acid microspheres, the porous poly-L-lactic acid microspheres are prepared by emulsification-solvent evaporation method from first component, second component and optional auxiliary component, wherein the first component is poly-L-lactic acid, the second component is sodium carboxymethyl cellulose, the content of the first component is 98%-99.9% of the total mass of the first component and the second component, the content of the second component is 0.1%-2% of the total mass of the first component and the second component, and the porous poly-L-lactic acid microspheres have topological morphology.

According to the lithium ion battery electrode material and the preparation method thereof, a composite material with molybdenum sulfide nanoparticles loaded on the surfaces of porous microspheres Ce-lambda-MnO2 is prepared through a two-step hydrothermal method, the porous structure provides a large number of active sites, the reversible capacity is improved, electrolyte permeation is promoted, and the performance of the lithium ion battery electrode material is improved. The wettability of the electrolyte on an electrode material is improved, and the lithium ion transmission rate is increased; by doping manganese dioxide with Ce, additional free electrons can be introduced, the band gap of MnO2 can be reduced, the electron mobility can be enhanced, lambda-MnO2 and MoS2 are compounded, and after a heterojunction structure is formed by the lambda-MnO2 and the MoS2, the conductivity and the capacity performance are further improved, the preparation process is simple, the price is low, and the preparation method has an industrialization prospect.

This invention provides a biodegradable microsphere, its preparation method, and its application. The biodegradable microsphere comprises a porous microsphere with a continuous internal pore structure and a gelatin component loaded on the porous microsphere. The biodegradable polyester microspheres prepared by this invention using a thermally induced phase separation-crystallization method have an excellent interconnected porous structure. The microspheres formed by combining with gelatin biomacromolecules can provide an excellent adhesion and survival environment for cells.

The invention relates to the technical field of drugs for neutron capture therapy and medical contrast agents, in particular to 157Gd neutron embolism microspheres as well as a preparation method and application thereof. According to the technical scheme, the 157Gd neutron embolization microsphere comprises an amidoxime-based porous microsphere and 157Gd loaded on the amidoxime-based porous microsphere. The preparation method comprises the following steps: grafting and polymerizing a functional monomer containing a nitrile group onto a porous substrate microsphere to obtain a porous microsphere containing a polyacrylonitrile group; carrying out ammoximation reaction on the porous microspheres containing the polyacrylonitrile groups, and converting nitrile groups into amidoxime groups to obtain amidoxime-based porous microspheres; and carrying out coordination chelation on the amidoxime-based porous microspheres and 157Gd, so as to obtain the 157Gd neutron embolization microspheres. The medicine is mainly used for neutron capture therapy of tumor local embolism.

The invention discloses a composition with an anti-oxidation function as well as a preparation method and application thereof, and belongs to the technical field of functional foods. The preparation method of the composition comprises the following steps: preparing a gamma-aminobutyric acid-citric acid eutectic mixture; constructing a corn oligopeptide-plant polyphenol oligosaccharide composite micelle; preparing corn germ concentrated powder-lactitol porous microspheres; and synergistically blending. Aiming at the problems of lack of synergistic effect, release mismatching and the like in the prior art, a three-stage physical structure design is adopted, a quick release-medium release-slow release cascade system is constructed, and component time sequence release and function collaboration are realized; plant polyphenol oligosaccharide is introduced to construct natural micelles, and the stability is improved through porous starch coating. The problems of poor component synergism, easy inactivation and the like are solved, endogenous and exogenous anti-oxidation linkage is realized, the action time is prolonged, and the bioavailability is improved.

The present application provides a kind of polyurethane foam of wide frequency range sound absorption.The polyurethane foam of wide frequency range sound absorption includes polyurethane matrix and the porous polyurethane microsphere of bimodal distribution of particle size dispersed therein, the porous polyurethane microsphere is prepared by incomplete reverse emulsification method, its particle size presents bimodal distribution, the particle size ratio of large particle size porous microsphere and small particle size porous microsphere is 2:1~10:1, and the total mass ratio of large particle size porous microsphere and small particle size porous microsphere is 0.5:1~4:1.The present application is dispersed by bimodal distribution of porous polyurethane microsphere in polyurethane foam material, so as to obtain the polyurethane foam sound absorption material of wide frequency range, and the method process is simple.

The invention discloses a medical sponge for laparoscopic surgery and a preparation method thereof, and relates to the field of medical sponges, a sponge matrix is composed of polyvinyl alcohol, gelatin for the matrix, collagen and sodium alginate for the matrix, and is provided with directionally arranged macroporous channels; the drug-loaded porous microspheres are composed of gelatin for microspheres and sodium alginate for microspheres and are loaded with tranexamic acid, an antibacterial agent and hemostatic active ingredients, oriented microporous channels are formed in the microspheres, and macroporous channels of the sponge matrix and microporous channels of the drug-loaded microspheres form a communicated cross-scale pore network; a hierarchical porous structure with the average diameter of a macroporous channel being 12-40 microns and the average diameter of a microporous channel being 3.0-8.0 microns is realized, the diameter of the drug-loaded microspheres is 50-90 microns, the drug-loaded microspheres are uniformly dispersed according to the proportion of 25%-35% of the dry weight of a matrix, the total drug loading capacity of active drugs reaches 1.5%-4.0% of the weight of the microspheres, and the problems that traditional medical sponge drug release is uncontrollable and the hemostatic and antibacterial effects are poor are solved. The clinical application value is wide.

The invention discloses a seamless constant-temperature moisture-absorbing and heating fabric containing phase-change microcapsules and a preparation method, and relates to the technical field of functional textile materials. The fabric comprises a three-layer seamless structure formed by integrally weaving regenerated cellulose-based yarns, wherein an outer layer contains 10%-20% of ternary composite microcapsules and 20%-40% of far infrared polyester fibers, so that moisture absorption and heating (the heating rate is 1.6-2.0 DEG C / min) and infrared radiation are realized; the middle layer contains 15%-25% of phase change microcapsules and 5%-10% of heat conduction filler, a heat buffer channel is constructed, and the constant temperature duration is 4.5-5.2 hours; the inner layer contains 10%-18% of double-response microcapsules and 5%-10% of porous microspheres, and the skin microenvironment is adjusted. According to the invention, the synergy of instantaneous temperature rise, long-acting constant temperature and comfortable humidity regulation is realized, the retention rate of temperature rise amplitude after 50 times of washing reaches 93.5-94.8%, the interlayer peel strength is maintained at 11.6-12.0 N / cm, and the fabric has high washability and structural integrity.

The invention discloses a preparation method of a monodisperse high-molecular polymer filler, which comprises the following steps: synthesizing seed microspheres with uniform particle size by a dispersion polymerization method, and preparing porous microspheres with required size and aperture by a two-step seed swelling method. In the preparation process, the selection, the mixing mode, the reaction temperature, the reaction time, the material proportion and the like of all the raw materials are accurately controlled, for example, the mass ratio of the dispersing agent to the vinyl monomer is (5-20)%: 1, and the like. A particle size control and pore size distribution model is also introduced to assist in controlling the product performance. The preparation method is simple in process, controllable in process and easy for industrial large-scale production. The obtained monodisperse polymer chromatographic filler has the advantages of accurately adjustable particle size and pore size, good monodispersity, good sphericity and narrow pore size distribution, can be widely applied to the fields of biochemistry, catalytic carriers, drug carriers and the like, effectively overcomes the defects of the traditional chromatographic filler, and meets the requirements of the market on high-performance chromatographic filler.

The invention relates to the technical field of modified melamine resin, and discloses a modified melamine resin preparation method, which comprises: mixing melamine, a formaldehyde solution, deionized water and a toughening monomer, adjusting the pH value, carrying out a stirring reaction, and after the system becomes clarified, obtaining a mixture; and adding zinc oxide whiskers loaded with the composite porous microspheres into the mixture, stirring and mixing, and cooling to room temperature to obtain the modified melamine resin. The zinc oxide whiskers loaded with the composite porous microspheres and the melamine resin form mechanical interlocking, external stress can be absorbed, then the mechanical strength of the melamine resin is improved, and release of free formaldehyde in the melamine resin is effectively reduced through the dual effects of physical adsorption and chemical fixation; the toughening monomer enlarges the spacing of rigid triazine rings in the melamine resin, and improves the toughness of the melamine resin.

The invention provides porous silica gel microspheres and a preparation method thereof, and the preparation method comprises the following steps: mixing porous polymer microspheres, a solvent and an organic silicon source, depositing the organic silicon source in pores of the porous polymer microspheres, and carrying out solid-liquid separation to obtain polymer / silica gel composite microspheres; and calcining the obtained polymer / silica gel composite microspheres to obtain the porous silica gel microspheres. According to the preparation method, the porous polymer microspheres are used as a template, surface functionalization treatment does not need to be carried out on the porous polymer microspheres, a surfactant does not need to be used for dispersing the porous microspheres, and an organic silicon source is directly deposited into pores of the porous polymer microspheres; the porous silica gel microspheres can be prepared after the obtained polymer / silica gel composite microspheres are calcined, the use of compounds with extremely high dangerousness and high toxicity is avoided, the raw material cost is saved, the operation process is simplified, the preparation process is safe and environment-friendly, and the porous silica gel microspheres can be applied to the fields of chromatographic packing and the like.