1284 results about "Emulsion polymerisation" patented technology

The invention relates to a composite phase-change film based on liquid metal and PBO fiber and a preparation method thereof, and belongs to the technical field of phase-change material preparation, and the preparation method comprises the following steps: the composite phase-change film comprises a poly (p-phenylbenzobisoxazole) fiber (PBO) base material, a phase-change material and a heat-conducting filler, the phase-change material is composed of phase-change microcapsules (PM) which are prepared by taking polyurethane (PU) as a wall material and organic solid-liquid phase-change materials (OPCMs) as a core material through a Pickering emulsion polymerization method. The prepared PM has a core-shell structure, and leakage of OPCMs is effectively prevented. The PM and the PBO fiber network are combined, so that the dual packaging of the OPCMs is realized, and the leakage of the OPCMs is further prevented. Meanwhile, dispersion and interaction of the OPCMs in a PBO matrix are optimized, and formation of a network structure with a limited domain is promoted. The composite phase change film prepared by the invention has relatively high mechanical properties, remarkable heat conductivity, excellent and stable flexibility and excellent heat storage capacity.

The invention discloses a water-based lithium battery positive electrode adhesive, a preparation method and application. The adhesive is of a single-layer or multi-layer shell core-shell structure formed by polar monomers such as acrylic acid, acrylate monomers, cross-linking monomers, self-emulsifying monomers and water through core-shell emulsion polymerization; by controlling the mass percent of acrylate monomers, polar groups and the like in the core layer structure and the shell layer structure and selecting proper types and dosages of cross-linking monomers and self-emulsifying monomers, the adhesive has proper surface tension, shows excellent adhesion and wettability to the current collector, has high peel strength, and is suitable for the current collector. According to the present invention, the lithium ion battery pole piece has the low glass-transition temperature so as to ensure the high toughness, the high surface density, the excellent electrolyte resistance, the excellent electrical property, the excellent coating property and the like of the pole piece, and the raw materials are all non-fluorine materials so as not to produce hydrogen fluoride and other harmful gases during the lithium battery recovery; water is used as a solvent, recycling is not needed, environment friendliness and low carbon are achieved, the manufacturing process is simplified, and the application range is widened.

The invention relates to the technical field of preparation of lithium adsorbents, in particular to a fluorine-containing polymer microsphere adsorbent for selectively adsorbing lithium as well as a structure regulation and control method and an application method thereof, and solves the technical problems of poor selectivity, low adsorption capacity, high preparation cost and complex preparation process of an existing lithium adsorbent. The fluorine-containing polymer microsphere adsorbent material based on the emulsion polymerization method is synthesized, operation is easy, cost is low, synthesis efficiency is high, large-scale preparation can be achieved, and high selectivity and adsorption capacity are achieved. The adsorbent material can efficiently and selectively adsorb lithium ions in lithium-containing wastewater containing a large number of coexisting monovalent and high-valent competitive ions, the adsorbability of the adsorbent material to the lithium ions is far better than that of the adsorbent material to ions such as sodium, potassium, cobalt, manganese and the like, and the adsorption capacity of the adsorbent material to the lithium ions can reach 38.5 mg / g at most.

This case relates to a self-healing optical film and its preparation method. The optical film is made by adding a nanoparticle suspension to PET masterbatch as the main material during its melt extrusion process, resulting in a cast sheet. After biaxial stretching, a self-healing coating liquid is coated online, followed by shaping and cooling. The nanoparticle suspension includes nano-titanium oxide, MAH-PET polymer, ATO nanoparticles, and titanate coupling agent. The self-healing coating liquid is produced by core-shell emulsion polymerization, forming a nano-silica hard core and an acrylate functional monomer polymer soft shell. This invention adds the nanoparticle suspension by in-situ feeding in the middle of the extruder, reducing steps, improving dispersion uniformity, and making the film surface smoother. Then, the self-healing coating liquid is applied online after longitudinal stretching and before transverse stretching, forming a film on the film surface, improving the hardness and scratch resistance of the film material, enabling rapid self-healing at room temperature, strong stability, and avoiding the occurrence of rainbow patterns.

The invention discloses a perfluoroether raw rubber emulsion as well as a preparation method and application thereof, and particularly provides a preparation method of the perfluoroether raw rubber emulsion, which is characterized by comprising the following steps: (1) in the presence of a water medium, an initiator, an emulsifier and a chain transfer agent, carrying out emulsion polymerization reaction on an initial mixed monomer; (2) continuously supplementing the first-stage mixed monomer into a polymerization reaction system until the total yield of the polymerization reaction is 25-67% of the final yield; the percentage of the final yield is mass percentage; and (3) continuously supplementing the second-stage mixed monomer into the polymerization reaction system until the polymerization reaction accumulates to obtain a final product. Perfluoroether raw rubber further prepared from the perfluoroether raw rubber emulsion prepared by the preparation method has one or more advantages as follows: the perfluoroether raw rubber emulsion is resistant to high temperature, small in permanent compression deformation and good in processability, and rubber obtained after vulcanization of the perfluoroether raw rubber has better performance parameters.

The invention provides a perfluoroether rubber sealing element and a preparation method thereof, and the preparation method comprises the following steps: taking tetrafluoroethylene and perfluoroalkyl vinyl ether as comonomers, and carrying out emulsion polymerization under the condition of a vulcanization point monomer and a chain transfer agent to obtain raw perfluoroether rubber; the preparation method comprises the following steps: mixing the raw perfluoroether rubber, the carboxyl fluorinated modified carbon nanotubes, a filler, a vulcanizing agent and an accelerant, and performing first-stage vulcanization and second-stage vulcanization to obtain the perfluoroether rubber sealing element. According to the perfluoroether rubber sealing element and the preparation method thereof provided by the invention, the compressive deformation resistance of the perfluoroether rubber sealing element is improved by adding the carboxyl fluorinated modified carbon nanotubes, so that the sealing element is ensured to meet the sealing requirement of semiconductor equipment.

The invention discloses an uvioresistant acrylic resin coating and a preparation method thereof, and belongs to the technical field of acrylic resin paints.The uvioresistant acrylic resin coating is characterized in that step-by-step functional design is adopted, a functional polyurethane prepolymer is constructed through prepolymerization reaction and double-bond end capping, fluorosilicone modified acrylate emulsion is prepared through a core-shell emulsion polymerization process, and the uvioresistant acrylic resin coating is obtained. Then carrying out surface silane modification on hexagonal boron nitride and carrying out composite coating to obtain a modified boron nitride auxiliary agent; and finally, carrying out composite emulsification and dispersion compounding on all the components to obtain the anti-ultraviolet acrylic resin coating. Through the synergistic enhancement effect of the fluorosilicone modified core-shell structure and the surface modified boron nitride, the ultraviolet aging resistance and the insulation reliability of the coating are remarkably improved on the basis of keeping high adhesive force, excellent flexibility and impact resistance of the coating; the problems that a traditional acrylic coating is prone to yellowing and pulverization under long-term ultraviolet radiation, and the mechanical property is reduced are effectively solved, and the acrylic coating is suitable for the field of electronic equipment protective coatings with high requirements for weather resistance, mechanical strength and electrical insulating property.

The invention discloses a leak-free core-shell hydrogel microsphere delivery system for non-contact flora transplantation as well as a construction method and application of the leak-free core-shell hydrogel microsphere delivery system. According to the invention, bacteria are encapsulated in a core of a core-shell microsphere through a two-step photo-initiation emulsion polymerization method of methacrylic acid gelatin, and a non-contact microbiota transplantation system (NMTS) is constructed. The NMTS can be used for biological encapsulation of various strains, shows encapsulation efficiency close to 100%, and has little influence on bacterial activity at the same time. NMTS demonstrates: a shielding effect that protects sealed bacteria from low pH values in the gastrointestinal tract and bile acid disruption; sufficient mechanical strength ensures that bacterial leakage is prevented and the infection risk is eliminated in the whole gastrointestinal tract delivery process; and internal and external substance exchange is realized, and the intestinal microorganism structure is remodeled. The invention provides a unique bacterial cell microencapsulation method which is a non-contact, safe and effective micropopulation transplantation method.

The invention relates to the technical field of organic silicon coatings, in particular to a preparation method of an organic silicon antifouling coating for slowly releasing a lubricant. The preparation method of the organosilicon antifouling coating of the slow-release lubricant comprises the following steps: carrying out emulsion polymerization on silicon dioxide nanoparticles, acryloyloxy alkyl alkoxy silane, fluorine-containing acrylate and lubricating oil in a redox system to obtain a fluorine-silicon modified silicon dioxide nanoparticle emulsion of which the surface is attached with the lubricating oil; and then mixing with organic silicon resin, a coupling agent, a cross-linking agent and a catalyst, and carrying out cross-linking curing to obtain the organic silicon coating. The lubricating oil is adsorbed on the surfaces of the nano particles under the action of grafted functional groups of the functionalized nano particles, so that the lubricating oil is introduced into the organic silicon coating in the form of emulsion particles, micro-nano lubricating oil droplets are formed, long-acting slow release of the lubricating oil is realized, the amphiphobic property and low surface energy of the coating are improved, and the antifouling capacity of the coating is improved; meanwhile, the mechanical property is improved.

The invention discloses a preparation method of two-component microcapsule self-repairing insulation paper based on epoxy resin and polymercaptan. The preparation method comprises the following steps: (1) preparing a repairing agent microcapsule and a curing agent microcapsule by an emulsion polymerization method; (2) mixing the prepared repairing agent microcapsule and curing agent capsule to obtain a bi-component microcapsule solution, and adding the bi-component microcapsule solution into the treated paper pulp; and (3) performing papermaking, drying and calendaring on the paper pulp added with the bi-component microcapsule solution to obtain the insulation paper. According to the invention, diglycerol ether type bisphenol F epoxy resin (DGEBF) stabilized by an emulsifier is adopted as a core of a repairing agent, polythiol (PETMP) stabilized by the emulsifier is adopted as a core of a curing agent, and the emulsifier is cellulose nanofiber, so that the insulating paper with self-repairing performance is prepared. The dielectric constant, the breakdown field strength, the tensile strength, the elongation at break and the thermal stability of the insulation paper are superior to those of traditional cellulose insulation paper, and the overall performance and the service life of the insulation paper can be effectively improved.

The invention discloses quick-dry water-based ink and a preparation method thereof, and relates to the technical field of ink. The preparation method comprises the following steps: firstly, enabling 4, 6-bis (allyloxy)-n-butyl-1, 3, 5-thiazine-2-amine and vinyl sulfonamide to participate in a polymerization reaction of acrylic acid and butyl acrylate, and preparing 4, 6-bis (allyloxy)-n-butyl-1, 3, 5-thiazine-2-amine and vinyl sulfonamide through a two-step emulsion polymerization method; the core-shell structure modified polyester emulsion with 2, 5-thiazine-2-amine and vinyl sulfonamide as soft shells and acrylic acid and butyl acrylate as hard cores improves the wear resistance and durability of the ink. Then allyl polyether reacts with 2-(p-chlorphenyl) ethylene oxide, so that the drying time is shortened, and the wear resistance of the ink is improved; then through addition reaction of reactants, bis (2-ethoxyl) dimethyl ammonium chloride and hydrogen-containing silicone oil, the epoxy-amino-polyether combined modified silicone oil flatting agent is formed, the flatting agent has hydrophilicity and hydrophobicity, the drying speed is increased, and the wear-resistant effect is improved.

The invention belongs to the technical field of antibacterial super-hydrophobic functionalization of selective laser sintering parts, and particularly relates to a preparation method of a breathable, antibacterial and self-cleaning TPU sports knee pad. According to the invention, SiO2 and TiO2 are grown on GO to obtain super-hydrophobic modified GO, and the super-hydrophobic modified GO-WPU emulsion is prepared through emulsion polymerization. Then, the TPU sports knee pad which is formed through the SLS technology and is of a gradient hollowed-out lattice structure with the hollowed-out degree gradually increasing from outside to inside is coated with an antibacterial and self-cleaning coating. The finally prepared TPU sports kneecap has breathable, antibacterial and self-cleaning functions, and is light to wear and high in buffer protection performance.

The invention discloses a lignin fiber reinforced environment-friendly asphalt mixture and a preparation method thereof, belongs to the technical field of asphalt preparation, and is used for solving the technical problem that the high temperature resistance and the tensile property of an asphalt mixture in the prior art need to be further improved. The composite lignin fiber modified asphalt is prepared from the following raw materials in parts by weight: 5 to 6 parts of matrix asphalt, 3 to 5 parts of composite lignin fiber, 2 to 4 parts of composite hollow microspheres and 81 to 102 parts of auxiliary materials, an organic metal framework is modified by utilizing a silane coupling agent, and a stable modification structure is formed on the modified lignin fiber by a modified hydrophobic framework through hydrolysis under an alkaline condition, so that the composite lignin fiber modified asphalt is obtained. The composite hollow microspheres are prepared through an emulsion polymerization method, and the composite hollow microspheres and the composite hollow microspheres are used as additives to be mixed with materials, so that the high-performance asphalt composite material is finally prepared.

The invention belongs to the technical field of building materials, and discloses an early-strength polymer modified cement-based grouting material and a preparation method thereof. The grouting material disclosed by the invention is prepared from the following raw materials in parts by weight: 100 to 115 parts of a cementing material, 100 to 115 parts of river sand, 20 to 23 parts of water, 2 to 2.5 parts of a water reducing agent, 0.02 to 0.04 part of an expanding agent, 0.22 to 1.76 parts of an acrylic emulsion and 0.04 to 0.08 part of a de-foaming agent, wherein the cementing material comprises 71-81 parts of Portland cement, 9-19 parts of sulphoaluminate cement, 6-8 parts of silica fume and 11-15 parts of fly ash microbeads. The early-strength, high-strength and high-fluidity cement-based grouting material can be obtained under the conventional curing condition by adopting the combined action of the acrylic emulsion polymer, the Portland cement and the sulphoaluminate cement, the plastic expanding agent, the polycarboxylate superplasticizer and the defoaming agent, and has good economic benefits and practical values.

The invention belongs to the technical field of high polymer materials, and discloses a force-induced unclonable label as well as a preparation method and application thereof. Electronegative monodisperse polymer nanospheres are prepared through emulsion polymerization, and after being swelled by using an isooctyl acrylate monomer, the nanospheres, acrylamide and ethylene glycol dimethacrylate are mixed, polymerized and photocured to form the structural color hydrogel film. The hollow-out steel template is used for mechanical force pressing, randomly-distributed microcrystalline light spots are obtained after a solvent is volatilized, the optical property of force-induced discoloration is displayed, and rapid and effective identification can be achieved. Compared with a traditional hydrogel anti-counterfeit label, the label has higher stability and reusability, does not need a solvent, and is environmentally friendly and practical. The technology not only realizes high-level anti-counterfeiting and encryption, but also has the potential of large-scale production.

The invention relates to the technical field of in-vitro diagnostic kits, in particular to carboxyl polystyrene microspheres, a preparation method and application of the carboxyl polystyrene microspheres in a kit for quantitatively detecting MxA. The preparation method of the carboxyl polystyrene microspheres comprises the steps that firstly, polystyrene microspheres with the surface rich in aldehyde groups are prepared through a soap-free emulsion polymerization method; then carrying out a Schiff alkali reaction with 2-aminoethyl methacrylate hydrochloride to carry out double bond modification on the surface of the microsphere, and meanwhile, improving the hydrophilicity of the microsphere by an ester group and an imino group; and finally, carrying out sulfydryl-double bond addition reaction on the polystyrene microspheres and mercaptosuccinic acid to generate the polystyrene microspheres rich in carboxyl on the surfaces. The carboxyl polystyrene microspheres prepared by the invention can improve the binding efficiency of latex and an MxA antibody, so that the detection sensitivity is improved, the purpose of high-sensitivity quantitative detection of MxA protein can be achieved, and the detection time is greatly shortened.

The invention provides an environment-friendly water-based acrylic emulsion adhesive without containing an organic solvent. The environment-friendly water-based acrylic emulsion adhesive is prepared from the following raw materials: 55-60 wt% of eleostearic acid hydroxyethyl acrylate (TMA), 15-25 wt% of butyl acrylate (BA), 3-10 wt% of acrylic acid (AA), 2-5 wt% of a cross-linking agent, 3-8 wt% of modified soil and 0.5-1 wt% of an initiator as a solid phase; the liquid phase is deionized water, and the environment-friendly water-based acrylic emulsion adhesive is prepared through semi-continuous emulsion polymerization. The prepared environment-friendly water-based acrylic emulsion adhesive is high in biodegradability and low in VOC content, has the mechanical property matched with that of a traditional acrylic emulsion adhesive and also has the self-repairing capacity, waste materials can be treated by changing the temperature or pH condition, the environment-friendly water-based acrylic emulsion adhesive can be recycled for multiple times, and the recycling cost is reduced.

A method for manufacturing a nitrile butadiene rubber includes: subjecting a material composition containing water, butadiene, acrylonitrile, an emulsifying agent, an initiator, and a molecular weight regulator to an emulsion polymerization reaction, so as to form an emulsion; and adding a reactive antioxidant and a non-reactive antioxidant to the emulsion to form a mixture, followed by subjecting the mixture to a coagulation process, so as to form the nitrile butadiene rubber.

The invention belongs to the field of environmental analytical chemistry, and provides a method for preparing micro / nano plastic based on stable isotope labeling and application of the micro / nano plastic. Specifically, an initiator, a pH buffer solution, ultrapure water, an emulsifier and a deuterated styrene monomer are mixed and emulsified through an emulsion polymerization method, a polymerization reaction is performed after emulsification, and then the deuterated polystyrene microspheres are obtained through cleaning and drying. According to the method, high sensitivity, high accuracy and safety of deuterium labeling are utilized, and a new research thought is provided for deeply researching the migration and transformation rule of the micro / nano plastic in the environment and long-term influence of the micro / nano plastic on organisms. The method is expected to promote the wide application of a hydrogen stable isotope labeling quantitative technology in the field of environmental science, and provides a scientific basis for evaluating the influence of the micro / nano plastic on the ecological environment and human health.

The invention relates to a film-forming filtrate reducer and a preparation method thereof, workover fluid and a workover method, and relates to the field of workover, the film-forming filtrate reducer comprises an oil phase, an emulsifier, acrylamide, N-vinyl pyrrolidone, 2-acrylamido-2-methylpropanesulfonic acid, hexadecyl dimethyl allyl ammonium chloride, water and an initiator; the workover fluid comprises water, a tackifier, a plugging agent, an acid-soluble temporary plugging agent, an interface modifier, a corrosion inhibitor, a weighting agent and the film-forming filtrate reducer. According to the film-forming filtrate reducer provided by the invention, specific acrylamide, N-vinyl pyrrolidone, acrylamido-2-methylpropanesulfonic acid and hexadecyl dimethyl allyl ammonium chloride are subjected to reverse emulsion polymerization to obtain a polymer, and the polymer is greatly adsorbed on the surface of a filter cake under the action of high temperature and high pressure to form a high-toughness polymeric film; the filter loss is reduced; the temperature resistance of the workover fluid is larger than or equal to 180 DEG C, the pressure-bearing plugging capacity of the workover fluid to a crack core is larger than 10 MPa, and the permeability recovery value is larger than or equal to 92%.

The invention relates to the technical field of thickening agents, and discloses a preparation process of a high-performance fracturing fluid emulsion type thickening agent. The preparation method comprises the following steps: S1, uniformly mixing 30-50% of oil phase and 50-70% of emulsifier; s2, preparing a water phase: dissolving a monomer and a cross-linking agent in water, and adjusting the pH to prepare the water phase; s3, emulsifying: dropwise adding the water phase into the oil phase, and performing high-speed shearing to form an inverse emulsion; and S4, polymerization reaction: adding an initiator under the protection of nitrogen, and carrying out polymerization reaction at 50-70 DEG C. By introducing the dynamic cross-linking agent, a reversible cross-linked network is formed in the molecular structure of the thickening agent. When the molecular chain of the thickening agent is broken under the action of high shearing force, the dynamic cross-linked structure can quickly reconstruct a molecular network, and the viscosity recovery rate of the thickening agent after shearing is ensured. And compared with the problem of low recovery rate caused by incapability of repairing broken molecules in the prior art, the adaptive capacity of the thickening agent in a high-shear environment is remarkably improved.

The invention relates to the technical field of ink resin preparation, in particular to a preparation method of quick-dry water-based ink resin.The preparation method comprises the steps that a pre-emulsification control module drives all emulsification raw material storage devices according to a preset proportion, pre-emulsification raw materials are injected into an emulsification kettle according to a certain sequence, the pre-emulsification technological process is regulated and controlled in real time, and pre-emulsion is prepared; a polymerization control module is used for adding part of the pre-emulsion and the polymerization initiator solution into a polymerization reaction kettle, when the polymerization reaction reaches a certain degree, the remaining pre-emulsion and the polymerization initiator solution are synchronously added according to a certain proportion, and polymerization is finished after the conversion rate is monitored to reach the standard in real time through near infrared spectroscopy. According to the present invention, through the preset ratio and the real-time regulation, the accurate mixing of the emulsification raw material and the strict control of the reaction condition can be ensured so as to improve the quality of the pre-emulsion and lay the good foundation for the subsequent polymerization reaction.

The invention relates to the technical field of adhesives, and discloses an anti-static acrylate pressure-sensitive adhesive and a preparation method thereof.The acrylate pressure-sensitive adhesive is formed by mixing an acrylate polymer serving as a base material and a curing agent serving as an auxiliary material, the acrylate polymer is prepared in a seed emulsion polymerization mode, and the anti-static acrylate pressure-sensitive adhesive is obtained. According to the pressure-sensitive adhesive, the carbon nanotube core and the modified polymeric monomer are added at the same time, on one hand, carbon nanotubes connected through chemical bonds can be uniformly dispersed in the pressure-sensitive adhesive, a continuous conductive path is formed, the antistatic effect of the pressure-sensitive adhesive is improved, and the modified polymeric monomer structure contains a large number of polymerizable unsaturated alkenyl functional groups, so that the antistatic effect of the pressure-sensitive adhesive is improved. The acrylate pressure-sensitive adhesive can improve the adhesive property and the high-temperature resistance of the acrylate pressure-sensitive adhesive by adding a large amount of high-polarity sulfonic acid groups and rigid heterocyclic structures, and also can generate an auxiliary effect on eliminating static electricity by utilizing the hydrophilicity of the sulfonic acid groups.

The invention discloses a preparation method of nitrile rubber with improved thermo-oxidative aging resistance, which comprises the following steps: butadiene and acrylonitrile are used as main polymerization monomers, and a reactive anti-aging agent with an amide group is used as a functional monomer; the total addition amount of butadiene and acrylonitrile is 100 parts by mass, and acrylonitrile is added in batches or continuously, preferably more than three times; a low-temperature emulsion polymerization method is adopted, and the compound emulsifier at least contains disproportionated rosin soap, C10-C13 linear alkyl benzene sulfonic acid and naphthalene sulfonic acid formaldehyde condensate sodium salt; the preparation method comprises the following steps of: adding a molecular weight regulator into a compound emulsifier, preferably 3.2-6.5 parts by weight, more preferably 3.8-6.0 parts by weight of the compound emulsifier, adding the molecular weight regulator once or multiple times, synthesizing butyronitrile rubber cement, adding a terminating agent, degassing, condensing, washing and drying to obtain the butyronitrile rubber. According to the invention, the nitrile rubber with good thermo-oxidative aging resistance is produced, wherein the content of bound acrylonitrile is 17-20%, and the binding amount of Mooney viscosity # imgabs0 # reactive anti-aging agent is 1-2%.

The invention discloses a preparation method of an anti-static ABS (Acrylonitrile Butadiene Styrene) composite material, and belongs to the technical field of ABS composite materials. According to the preparation method of the anti-static ABS composite material, the anti-static performance and the mechanical performance of the composite material are remarkably improved through the synergistic effect of the conductive core-shell particles and the surfactant type anti-static agent. The formula comprises ABS resin, conductive core-shell particles, a surfactant type antistatic agent, an antioxidant BHT (butylated hydroxytoluene), EPDM (Ethylene-Propylene-Diene Monomer), a plasticizer and the like. Conductive core-shell particles are prepared through an emulsion polymerization method, and in-situ polymerization and blending reaction are carried out at high temperature to ensure that the conductive particles are uniformly dispersed in the material to form a stable conductive network. According to the method, melt blending is performed through a double-screw extruder, so that the uniformity and stability of the material are ensured. The finally obtained composite material has excellent antistatic property, mechanical strength and thermal stability, is suitable for the industries of electronics, automobiles and the like, and has a wide application prospect.

The invention relates to a water shutoff profile control agent and a preparation method thereof, and belongs to the technical field of oilfield chemicals. The water shutoff profile control agent is prepared by inverse emulsion polymerization reaction, and is prepared from the following raw materials: a water phase solution, an oil phase solution and an initiator, the water-phase solution comprises acrylamide, an anionic monomer, a cationic monomer, a temperature-resistant salt-resistant monomer, a cross-linking agent, a silane coupling agent modified carbon nanotube, a reinforcing agent, modified tannic acid and water; the oil phase solution comprises base oil and an emulsifier. The water shutoff and profile control agent prepared by adding the silane coupling agent modified carbon nanotubes, the reinforcing agent and the modified tannic acid in inverse emulsion polymerization is good in injectivity, high in strength after water absorption and swelling, controllable in swelling time, capable of achieving secondary crosslinking under the high-temperature and high-salt condition, and good in water shutoff and profile control effect. The plugging agent not only can be matched with oil layers with different permeability and heterogeneous stratums, but also can be well adapted to plugging of deep well ducts with higher pressure and higher depth, and the plugging effect is more excellent.

The invention relates to an ammonium polyphosphate microcapsule flame retardant, and belongs to the technical field of flame retardant materials. The ammonium polyphosphate microcapsule flame retardant is prepared by a method comprising the following steps: carrying out emulsion polymerization reaction on ammonium polyphosphate, an alkenyl silane coupling agent and a borosilicate polymeric monomer under the action of an organosiloxane / persulfate redox system containing Si-N bonds; the borosilicate polymeric monomer is prepared by carrying out condensation reaction on alkenyl trialkoxy silane and boric acid, and the mass ratio of the alkenyl trialkoxy silane to the boric acid is (14-15): (6-7). The ammonium polyphosphate microcapsule flame retardant disclosed by the invention does not need an organic solvent during preparation, and is simple in operation process, low in toxicity, convenient to produce, easy to control, safe and environment-friendly.

The invention relates to the technical field of anti-counterfeiting films, and in particular to a multi-layer composite anti-counterfeiting film and a preparation method thereof. The invention uses styrene, n-butyl acrylate, methacrylic acid and allyl methacrylate as raw materials, and adopts a semi-stepwise emulsion polymerization method to prepare a colloidal microsphere component having excellent structural stability and dispersibility. In the process of preparing a photonic crystal film with the colloidal microsphere component, perovskite quantum dots are added, and the perovskite quantum dots can be embedded in the photonic crystal film formed by the colloidal microspheres, so that the periodic structure of the photonic crystal interacts with the fluorescence characteristics of the perovskite quantum dots, thereby leading to fluorescence enhancement; secondly, the colloidal microspheres serve as a protective layer, wrapping the perovskite quantum dots inside, reducing direct contact between the quantum dots and the external environment, thereby reducing the erosion of the quantum dots by factors such as water, oxygen, light and heat, improving the stability of the quantum dots, and preventing the agglomeration of the perovskite quantum dots, which helps to maintain their optical properties.

The invention provides N-O doped flower-like porous carbon microspheres as well as a preparation method and application thereof, and belongs to the technical field of electromagnetic wave absorbing materials. According to the invention, microspheres are coated by using a simple soap-free emulsion polymerization method, a complex multi-layer heterogeneous interface structure is realized, N and O atoms are introduced, and heteroatom doping is realized so as to improve the wave-absorbing performance; a unique flower-shaped structure is grown on the surface of the microsphere through a self-assembly process, and an exquisite flower-shaped porous carbon microsphere can be obtained through carbonization, so that an ingenious structure beneficial to multiple reflection and scattering generation is realized. Under the conditions that the mass ratio of the flower-like porous carbon microspheres to the paraffin is 1: 5 and the matching thickness is 2.5-3mm, the minimum reflection loss of the flower-like porous carbon microspheres is-40.8 to-48.0 dB, the optimal effective absorption bandwidth is 4.40 GHz, and the flower-like porous carbon microspheres have excellent electromagnetic wave absorption performance.

A novel seed coating composition. The coating comprises a wax emulsion, a polymeric binder, a fibrous material, and a filler having a bulk density of 0.05 to 0.80 g / mL. In particular, the coating is selected from polyethylene or Fischer-Tropsch wax emulsions, polyvinyl-based binders, talc and cellulosic fibers. When applied to seed, the seed coating composition provides water permeability, good wear resistance, low dust emissions, short drying time, good flowability and plantability, low caking, good modification and / or coverage, higher ability to add a greater number of desired nutrients and seed and plant protectants, as well as the ability to coat seeds and plants. And / or increasing seed size to improve plantability. The use of the seed coating composition for coating a seed, a method of forming a coated seed using the composition, and the resulting coated seed are also provided.