1034 results about "Caprolactam" patented technology

The invention discloses a biosynthesis system for high-yield 1, 6-hexamethylenediamine and application of the biosynthesis system, and belongs to the technical field of biology. According to the method, key genes which are excavated and optimized in a 1, 6-hexamethylenediamine biosynthetic pathway are co-expressed in a single cell module or a multi-cell module, and different enzyme elements expressed by the cell module are subjected to enzyme cascade reaction, so that 1, 6-hexamethylenediamine can be efficiently synthesized by taking caprolactam or 6-aminocaproic acid as a substrate; furthermore, after the carboxylic acid reductase MaCAR is mutated, the catalytic activity of the carboxylic acid reductase MaCAR can be remarkably improved, and the yield of the 1, 6-hexamethylenediamine is further improved; in addition, the biosynthesis system disclosed by the invention directly takes the cell module as a whole-cell catalyst, and an enzyme purification step is avoided, so that the biosynthesis system has the advantage of low cost.

The invention discloses a nylon elastomer preparation method, which comprises: S1, weighing preparation raw materials of a nylon elastomer according to a feeding ratio, and weighing the preparation raw materials by using a weighing device, the nylon elastomer is prepared from the following raw materials: tridecane diamine, tridecane dibasic acid, dodecanediamine, dodecanedioic acid, undecanediamine, undecanedioic acid, decamethylene diamine, sebacic acid, pentamethylene diamine, glutaric acid, hexamethylenediamine, adipic acid, caprolactam, and one or more of polyether amine and polyether alcohol; and S2, feeding the preparation raw materials weighed in the step S1. In the preparation process of the nylon elastomer, the nylon elastomer with different melting points, different crystallization temperatures, different strengths and different elongation at break is produced by adopting a multi-component copolymerization mode and adjusting the types and the molecular weights of polyether amine and polyether alcohol by adjusting the types and the proportions of binary acid and diamine, so that the nylon elastomer is suitable for different use environments; the utilization rate is improved.

The invention discloses an antibacterial nylon material as well as a preparation method and application thereof, relates to the technical field of antibacterial high polymer materials, and solves the problems of poor antibacterial performance and difficulty in industrial production of existing antibacterial nylon 6. The preparation method comprises the following steps: mixing a seven-membered cyclic lysine derivative monomer with lactam, and carrying out hydrolytic polymerization by taking water as an initiator to obtain copolyamide; and placing the copolyamide in an acid solution, heating and stirring to carry out protonation reaction, and purifying the reaction product to obtain the antibacterial nylon material. The seven-membered cyclic lysine derivative monomer is an unprotected cyclic lysine monomer (aminocaprolactam), a single protected cyclic lysine monomer or a salified cyclic lysine monomer. The method can be widely applied to the fields with antibacterial requirements, such as fabrics, plates, pipes, packaging and various panels.

The present disclosure relates to the technical field of drilling fluid, and discloses a high density environmentally friendly polymer water-based drilling fluid with resistance to 240° C. and saturated salts, a preparation method therefor and use thereof. The water-based drilling fluid comprises a micro-crosslinked heterocyclic polymer filtrate reducer, a hyper-branched strongly adsorbed filtrate reducer, a nanometer intercalated complex shearing potentiator, a flexible outer and rigid inner microsphere plugging agent, and water, wherein the micro-crosslinked heterocyclic polymer filtrate reducer is prepared by reacting sodium p-styrene sulfonate, N,N,N-trimethyl-3-(2-methylallylamino)-1-propyl ammonium chloride, N,N-diethyl acrylamide, N-vinyl caprolactam, tetramethyl ethylenediamine with phenyl triethoxy silane. The high density environmentally friendly polymer water-based drilling fluid with resistance to 240° C. and saturated salts of the present disclosure can exhibit good performance at high temperature and high salinity conditions, and has desirable weighting capability, it can meet the requirements of drilling well in the deep oil and gas formations.

The invention discloses functional caprolactam, an intrinsic flame-retardant nylon material as well as a preparation method and application thereof, and relates to the technical field of flame-retardant nylon materials. The preparation method comprises the following steps: preparing an alpha-amino-epsilon-caprolactam intermediate by taking lysine as an initial raw material through one-step efficient cyclization, then reacting with a reagent containing a flame-retardant group to obtain functional caprolactam, and finally introducing the flame-retardant group into a side chain of nylon 6 by utilizing ring-opening copolymerization of the functional caprolactam and caprolactam to prepare the intrinsic flame-retardant nylon material. The flame-retardant nylon material can effectively avoid the migration and loss of the flame retardant, improve the dispersity of the flame retardant and enhance the flame-retardant effect, can keep the main chain structure of the nylon 6 unchanged, reduces the influence on the inherent performance of the nylon 6, is expected to directly replace the existing nylon 6 material, and is applied to the fields of automobiles, textiles, electronics and electrics, buildings, packaging and the like. In addition, a renewable lysine resource is used for partially replacing a petroleum resource, so that the method has the advantages of resource conservation, environmental friendliness, simple process, low cost and the like.

The invention relates to the technical field of synthetic fibers, in particular to a high-elasticity textile fiber and a preparation process thereof. The high-elasticity textile fiber is prepared from the polyurethane-polyamide elastomer and the modified diatomite master batch through melt spinning, drafting and winding. According to the invention, hydroxyl-terminated polydimethylsiloxane is used as polyol, and the molar ratio of the polyurethane prepolymer to the polyamide prepolymer is controlled, so that the prepared polyamide-polyurethane elastomer slice has good heat resistance; the molar ratio of isocyanate to polyol and the molar mass ratio of caprolactam to adipic acid are controlled, so that the prepared textile fiber is excellent in mechanical property; 2, 2-dimethylolpropionic acid is used for a chain extension reaction, the molar ratio is controlled, the moisture regain of the prepared textile fiber is 8.58%, and the moisture absorption is high; the diatomite is modified by the quaternary ammonium salt compound, and the addition proportion is adjusted, so that the prepared spinning fiber has good antibacterial performance.

The invention relates to the technical field of fibers, and discloses an antibacterial and antistatic fiber material based on silver ions and halamine and a preparation method of the antibacterial and antistatic fiber material. The preparation method comprises the following steps: loading a methyl methacrylate-based polymer on the surface of a silver-loaded molecular sieve through an in-situ polymerization method, and grafting a halamine antibacterial monomer chlorinated piperidinol through an ester exchange reaction to obtain an antibacterial agent; the preparation method comprises the following steps: carrying out reaction polymerization on caprolactam, quaternized polyether, polyethylene glycol, 2, 6-dipicolinic acid and adipic acid to obtain an antistatic agent; an antibacterial agent, an antistatic agent and nano-silver are added into chemical fiber slices, the antibacterial and antistatic fiber material based on silver ions and halamine is prepared after melt spinning, and the chemical fiber slices are polyester slices or chinlon slices or polypropylene slices. The fiber material has excellent antibacterial and antistatic properties.

The invention discloses copolymerized nylon 6 resin with a synergistic flame-retardant effect and a preparation method of the copolymerized nylon 6 resin. The molecular structure of the copolymerized nylon 6 resin with the synergistic flame-retardant effect is shown as a formula I. The preparation method of the copolymerized nylon 6 resin with the synergistic flame-retardant effect comprises the steps that phosphorus-containing binary acid and low-molecular-weight amino-terminated organic silicon (Mn < = 2000) are subjected to a salt forming reaction to prepare a component A, and then the component A and caprolactam are copolymerized to obtain the copolymerized nylon 6 resin with the synergistic flame-retardant effect. The copolymer nylon 6 resin with excellent mechanical and flame retardant properties is obtained by regulating and controlling the molecular weight of the amino-terminated organic silicon and the copolymerization ratio of the component A, and the copolymer nylon 6 resin is simple in synthesis route and environment-friendly in technological process. # imgabs0 #

The invention provides a hydrolysis method of a waste nylon 6 fishing net. The hydrolysis method comprises the following steps: step 1, screening the waste nylon 6 fishing net, cleaning, removing impurities, disinfecting and crushing; step 2, pretreating diatomite; step 3, adding pretreated diatomite, solid acid and deionized water into a reaction kettle, stirring at 50 DEG C for 5 hours, and removing moisture to obtain a solid acid catalyst; 4, adding the solid acid catalyst, the cleaned waste nylon 6 fishing net and deionized water into a reaction kettle, controlling the temperature and time for reaction, and filtering while hot to obtain a liquid-phase product; 5, neutralizing, decolorizing and extracting the liquid-phase product to obtain a caprolactam monomer; and 6, carrying out polymerization reaction on the obtained caprolactam monomer to generate regenerated polyamide for chinlon spinning. According to the method provided by the invention, the solid acid catalyst is easily separated from reactants, the catalytic efficiency is high, the corrosion to equipment can be reduced, and the method is more environment-friendly.

A high-strength PA6 composite material and a preparation method therefor, the PA6 composite material comprising, in parts by mass, 80-95 parts of caprolactam, 1-3 parts of benzoic acid and 10-30 parts of a modification additive. The benzoic acid is used for improving the tensile strength of the composite material, and the modification additive is used for enhancing the impact resistance of the composite material. Terephthalic acid and m-xylylenediamine undergo a reaction to generate m-xylylenediamine terephthalate, which is then subjected to a polycondensation reaction with caprolactam, so as to introduce same into the backbone of a PA6 molecule and modify the PA6 resin. The modified PA6 resin has remarkably improved tensile strength and impact resistance, so that the application range of the PA6 composite material can be greatly expanded.

The invention relates to the field of caprolactam production, and discloses a green and efficient production process and device. The process comprises the following steps: continuously oximating cyclohexanone and hydroxylamine in a microreactor under the catalysis of mesoporous silica solid acid; carrying out gas phase rearrangement on cyclohexanone-oxime in the presence of a ZSM-5 molecular sieve under the assistance of microwaves; coupling, rectifying and purifying the crude product through a four-stage molecular sieve membrane; and performing catalytic cracking on the by-product to obtain N2 / H2O and recycling. The device comprises a micro-reaction unit, a microwave-radial reactor, a membrane coupling rectifying tower group and a tail gas cracking unit. Zero emission of ammonium sulfate is achieved, the product purity is larger than or equal to 99.95%, and energy consumption is reduced by 45%.

The invention relates to the technical field of fabric waterproofing agents, in particular to a polyurethane modified organic silicon fluoride-free waterproofing agent and a preparation method thereof. The polyurethane modified organic silicon fluoride-free waterproof agent is prepared from the following raw materials in parts by mass: 5 to 15 parts of hexamethylene diisocyanate, 5 to 15 parts of butyl acrylate, 1 to 5 parts of methyl methacrylate, 40 to 60 parts of octamethylcyclotetrasiloxane, 10 to 30 parts of alpha, omega-dihydroxy polydimethylsiloxane and 5 to 10 parts of gamma-aminopropyl methyl diethoxy silane. The invention relates to a silane coupling agent, which is prepared from the following raw materials in parts by weight: 1 to 5 parts of glycidyl ether oxypropyl trimethoxy silane, 0.1 to 1 part of tetramethylammonium hydroxide, 0.1 to 1 part of triethylamine, 2 to 5 parts of tetraethoxysilane, 0.2 to 0.75 part of ammonia, 0.1 to 1 part of silane coupling agent KH-570, 0.01 to 0.1 part of dibutyltin dilaurate, 1 to 5 parts of epsilon-caprolactam, 1 to 2 parts of emulsifier and 0.1 to 1 part of initiator. The fabric treated by the method has good softness and excellent hydrophobic effect.

The invention relates to the technical field of organic synthesis, in particular to a synthesis method and application of functional caprolactam and functional nylon-6. The synthesis method comprises the following steps: in the presence of a catalyst and a solvent, enabling amino caprolactam and / or a derivative thereof to contact and react with benzaldehyde, so as to obtain functional caprolactam which is bis (benzyl) amino caprolactam, wherein the reaction conditions are as follows: the temperature is 150-350 DEG C; the hydrogen pressure is 0.1 to 10 MPa; the time is 5-15 hours. The synthesis method not only has the advantages of high reaction efficiency, high catalytic efficiency, adjustable target product selectivity and the like, but also simplifies process conditions, and realizes green large-scale production.

The invention discloses a hydroxylamine sulfate preparation method, which comprises: S1, carrying out analysis on caprolactam sulfate with water or a hydroxylamine sulfate aqueous solution to obtain a caprolactam sulfuric acid aqueous solution; extracting and separating the caprolactam sulfuric acid aqueous solution by using an extracting agent, conveying an extraction phase caprolactam organic solution to a caprolactam device for treatment, and entering a step S2 into a raffinate phase sulfuric acid aqueous solution or hydroxylamine sulfate and sulfuric acid aqueous solution; s2, adding ketoxime and a sulfuric acid aqueous solution or hydroxylamine sulfate and the sulfuric acid aqueous solution to generate a hydrolysis reaction to generate a hydroxylamine sulfate aqueous solution and ketone, and after ketone separation, sending the ketoxime to a ketoxime preparation device; s3, carrying out steam stripping separation on the hydroxylamine sulfate aqueous solution, sending unreacted ketoxime to the step S2 to participate in a hydrolysis reaction, and carrying out concentration crystallization, centrifugal filtration and drying dehydration on the hydroxylamine sulfate aqueous solution to obtain hydroxylamine sulfate; and S4, returning part of hydroxylamine sulfate raffinate subjected to centrifugal filtration to the step S1 for resolving caprolactam sulfate, and carrying out oximation reaction treatment on the residual hydroxylamine sulfate raffinate and ketone.

The invention relates to a method for efficiently hydrolyzing nylon 6 by acid catalysis, and relates to the technical field of hydrolysis of nylon 6, the method comprises the following steps: carrying out hydrolysis reaction on nylon 6, water and an acid catalyst in a closed state to obtain a hydrolysis product; and carrying out purification post-treatment on the hydrolysis product to obtain caprolactam, the reaction pressure of the hydrolysis reaction is controlled in a self-boosting manner; the specific process of the self-boosting mode comprises the step of changing the pressure of the hydrolysis reaction system by adjusting the adding mode of the water. The nylon 6 hydrolysis process provided by the invention is simple, hydrolysis reaction pressure is controlled mainly by a self-boosting control method of a reaction system by controlling a water adding mode, other raw materials do not need to be added, efficient hydrolysis of nylon 6 is realized, and the nylon 6 hydrolysis process has the characteristics of short hydrolysis reaction time, high depolymerization rate and the like, and is suitable for industrial production. The method effectively solves the technical problems of long hydrolysis reaction time and low depolymerization rate in the existing process for catalyzing and hydrolyzing nylon 6 by using an acid method.

The invention discloses a carbon nano tube / caprolactam in-situ body synthesized nylon 6 composite material and a preparation method and application thereof, the material is prepared from a carbon nano tube, caprolactam and a catalyst through a body reaction processing technology, and the carbon nano tube is a single-wall or multi-wall carbon nano tube. The preparation method specifically comprises the following steps: firstly, uniformly mixing the raw materials according to a specific proportion, and then sequentially completing the conveying of low-viscosity raw materials, the self-initiation of polymerization reaction, macromolecular growth and the extrusion of high-viscosity products in a double-screw extruder, so that the caprolactam monomer is subjected to continuous chemical reaction and physical forming, and the caprolactam-based composite material is obtained. The conductive carbon nanotube modified nylon 6 composite material is obtained through one-step in-situ bulk polymerization. According to the invention, under the condition that only a trace amount of carbon nanotubes are added, the composite material can present excellent conductivity, the preparation method is simple and efficient, has a remarkable cost advantage and is easy for industrial production, and the morphological structure of the composite material can be flexibly regulated and controlled through molding equipment according to actual use requirements.

In some embodiments of the present disclosure, a solid dispersion is provided, comprising: lurasidone or its pharmaceutically acceptable salt and a carrier. The material of the carrier comprises polyvinyl acetate phthalate (PVAP), polyvinyl alcohol (PVA), cellulose acetate phthalate (CAP), mesoporous silica, hydroxypropyl methycellulose (HPMC), polyvinyl caprolactam-polyvinyl acetate-polyethylene glycol graft copolymer, acrylic resin, hydroxypropyl cellulose (HPC), povidone, copovidone, ethyl cellulose, polyoxyethylene glycol, hypromellose acetate succinate (HPMCAS), hypromellose phthalate (HPMCP), or a combination thereof.

The present invention discloses an α-aminocaprolactam flame retardant containing a substituted P-C-N functional group, and a preparation method and application thereof. The flame retardant is prepared by a two-step reaction of three components, namely, α-aminocaprolactam, an aldehyde-containing compound, and an organophosphorus compound containing a P-H bond. First, the aldehyde-containing compound is reacted with the α-aminocaprolactam to obtain a Schiff base intermediate, which is then subjected to nucleophilic addition with the organophosphorus compound containing a P-H bond to obtain an α-aminocaprolactam substituted with a P-C-N functional group. The flame retardant of the present invention can introduce a variety of flame retardant elements including phosphorus, nitrogen, halogen, silicon and the like through the aldehyde-containing compound and the organophosphorus compound containing a P-H bond, thereby giving it good flame retardant properties; at the same time, the caprolactam group contained can be copolymerized with a variety of monomers or exchanged with a variety of polymers to prepare a variety of intrinsic flame-retardant polymers, and has broad application prospects.

The present disclosure relates to a method that includes hydrolyzing a polyamide by contacting the polyamide with a hydrolase. In some embodiments of the present disclosure, the polyamide may include nylon-6, nylon 6,6, or a combination thereof. In some embodiments of the present disclosure, the hydrolyzing may produce aminohexanoic acid, an oligomer of aminohexanoic acid, ε-caprolactam, or combinations thereof.

The invention discloses an enhanced monomer casting nylon material and a preparation method thereof, and relates to the technical field of high-molecular compounds, in particular to a high-molecular compound obtained by reaction except for carbon-carbon unsaturated bond, the nylon material comprises caprolactam, glass fiber, resin particles, graphene powder and an antibacterial agent, by utilizing the high strength of the glass fiber and the resin particles, the texture of the nylon material is tighter, an attachment site is provided for the antibacterial agent when the nylon material is combined with the caprolactam, the antibacterial agent and the caprolactam can have firmer combining capacity, the compact material structure can resist corrosion, and the service life of the antibacterial agent is prolonged. The corrosion resistance and the antibacterial property of the monomer casting nylon are improved, and the defect that the corrosion resistance and the antibacterial property are insufficient in the monomer casting nylon process is overcome; the silver ion antibacterial agent is tightly combined with the graphene, so that the release speed of the silver ion antibacterial agent can be slowed down, and a stable antibacterial effect can be realized.

The invention relates to the technical field of textile materials, and particularly discloses high-strength screen cloth and a preparation method thereof. The high-strength screen cloth is prepared from the following raw materials: caprolactam, p-phenylenediamine, adipic acid, diphenyldicarboxylic acid, a modified monomer, zinc diethyl hypophosphite, divinyl benzene, modified glass fibers, an antioxidant and a lubricant. The preparation method comprises the following steps: preliminarily polymerizing caprolactam, p-phenylenediamine, adipic acid, biphenyldicarboxylic acid and the modified monomer, then adding the modified glass fiber, zinc diethyl hypophosphite and divinyl benzene for continuous reaction to obtain a polyamide copolymer, and finally performing melt spinning and weaving on the polyamide copolymer, the antioxidant and the lubricant to obtain the required high-strength mesh cloth. The high-strength screen cloth prepared by the invention has excellent mechanical properties and aging resistance, is suitable for being applied to the fields with high-performance requirements, such as constructional engineering materials and special protective equipment, and is high in practicability and wide in application prospect.

The invention discloses a thermal antistatic fabric based on polyamide fibers and a preparation method thereof, and relates to the technical field of textile fibers. When the thermal antistatic fabric based on the polyamide fiber is prepared, caprolactam, a flame retardant and hexamethylenediamine react to prepare pre-modified polyamide; the pre-modified chinlon and 3-chloro-1-propanethiol are subjected to a reaction, and modified chinlon is prepared; the preparation method comprises the following steps: sequentially reacting graphene oxide with mercaptopropyltrimethoxysilane and 2-(2H-benzotriazole-2-yl)-4-methyl-6-(2-propenyl) phenol, so as to obtain modified graphene oxide; the modified chinlon and the modified graphene oxide are mixed and then subjected to melt spinning, and modified chinlon fibers are obtained; and twisting the modified polyamide fiber, spinning, and post-processing to obtain the thermal antibacterial fabric based on the polyamide fiber. The warm-keeping antistatic fabric based on the polyamide fiber has good warm-keeping, antistatic, flame-retardant, anti-aging and mechanical properties.

The present disclosure provides siloxane derivatives of amino acids that have surface-active properties. The amino acid can be naturally-occurring or synthetic, or they may be obtained via a ring-opening reaction of a lactam, such as caprolactam. The amino acid may be functionalized with a siloxane group to form a compound that is surface-active and has surfactant characteristics. The compounds have low critical micelle concentrations (CMC) as well as the ability to lower the surface tension of a liquid.

Disclosed are a nylon-overmolded TPE composite material, a preparation method therefor and a use thereof. The nylon-overmolded TPE composite material of the present invention comprises: a hydrogenated styrene elastomer, mineral oil, polypropylene, polycaprolactam, a thermoplastic polyamide elastomer, maleic anhydride grafted polypropylene, a maleic anhydride grafted olefin copolymer elastomer, a maleic anhydride grafted hydrogenated styrene elastomer, a filler, and an additive. The nylon-overmolded TPE composite material combines polycaprolactam and a thermoplastic polyamide elastomer, along with other components; the use of the polycaprolactam enhances the strength of the composite material and improves the overmolding performance; moreover, the thermoplastic polyamide elastomer not only increases the elastomer content to improve the appearance of the composite material, but also can improve the overall compatibility of the polycaprolactam with the composite material; thus, a nylon-overmolded TPE composite material having high binding force, excellent mechanical properties and good appearance is obtained.

The present disclosure provides derivatives of amino acids that have surface-active properties. The amino acid can be naturally-occurring or synthetic, or they may be obtained via a ring-opening reaction of a lactam, such as caprolactam. The amino acid may be functionalized to form a compound that is surface-active and have advantageous surfactant characteristics. The compounds of the present disclosure have low critical micelle concentrations (CMC) as well as superior ability to lower the surface tension of a liquid.

The invention relates to a method for preparing polyamide 6 fine denier fibers through anionic polymerization. Caprolactam and a catalyst are added into a drying device A to remove system moisture and then placed in a storage tank A. Caprolactam is added into a drying device B to remove moisture and then placed in a storage tank B together with an initiator and a cyclic oligomer inhibitor. Caprolactam liquid in the storage tank A and the storage tank B is continuously injected into a screw extruder for anionic ring-opening polymerization reaction to prepare a polyamide 6 basic melt, the basic melt is further conveyed to a tandem devolatilization reaction system to remove monomers and part of cyclic oligomers to obtain a polyamide 6 final polymer, and finally, the polyamide 6 final polymer can be directly spun. The polyamide 6 fine denier fiber is obtained.

The invention provides a process method for chemically regenerating a PA6 product by using waste chinlon textiles, and belongs to the technical field of chinlon 6 waste recovery. According to the method, the waste chinlon textile is used as a raw material, refined caprolactam is obtained through depolymerization, flash evaporation, centrifugal separation and purification, and then the refined caprolactam is subjected to two-stage polymerization including front-stage pressurization and rear-stage decompression and a devolatilization process, so that the regenerated PA6 product is directly obtained. The PA6 melt prepared by the method is low in oligomer content, low in cyclic dimer content and low in caprolactam content, the regenerated PA6 product is excellent in performance, a new method is provided for resource reutilization of waste chinlon textiles, and the method has the advantages of being low in cost and easy to popularize.

The invention relates to the technical field of catalysts, in particular to a silicon-aluminum-based metal catalyst as well as a preparation method and application thereof, and a method for preparing dimethylaminocaprolactam. The modified aluminum oxide provided by the invention effectively reduces the density of B acid on the premise of ensuring certain density of L acid, and also has low wear index, high crushing strength, high specific surface area and low average pore size; meanwhile, the silicon-aluminum-based metal catalyst containing the modified aluminum oxide has relatively high catalytic activity, and has relatively high raw material conversion rate and target product selectivity when being particularly used for preparing dimethylaminocaprolactam.

The invention discloses a pH and temperature dual-responsive Pickering emulsion resistant to high temperature and an acid-base environment, which is characterized in that N-vinylcaprolactam (VCL) and sodium alginate (SA) are used as raw materials, flexible P (VCL-co-SA) microgel solid particles with pH and temperature dual-responsiveness are synthesized through a precipitation polymerization method, and the flexible P (VCL-co-SA) microgel solid particles are used for stabilizing the pH and temperature dual-responsive Pickering emulsion with water as a continuous phase and the pH and temperature dual-responsive Pickering emulsion. The O / W type Pickering emulsion is an O / W type Pickering emulsion with a water phase and dodecane and the like as a dispersed phase, and the stability of the emulsion is enhanced by adding Ca < 2 + > into the water phase. The Pickering emulsion disclosed by the invention has pH and temperature responsiveness and excellent stability, and can be stable not only at normal temperature but also at high temperature in strong acid (pH = 3) and strong alkali (pH = 9) environments. The preparation method of the emulsion is simple, the reaction condition is mild, the dosage of raw materials for preparing the microgel is small, the cost is low, and the prepared microgel and emulsion have good biocompatibility and have wide application prospects in the fields of food, medicine, cosmetics, petrochemical engineering and the like.

The invention discloses a sulfonate grafted polyether-polyester-polyamide block copolymer and a synthesis method thereof, and belongs to the field of materials. The invention provides a block copolymer elastomer material taking polycaprolactam as a hard segment and polyether and polyester as soft segments, and specific sulfonic acid groups are introduced to meet specific applications. According to the invention, caprolactam, 6-aminocaproic acid, aliphatic dibasic acid, aliphatic diamine, polyether glycol, sulfonate grafted polyester polyol BY-3305 and the like are used as raw materials, and macromolecular sulfonate grafted polyester polyol BY-3305 is used as a sulfonate grafting agent, so that the reaction efficiency is higher than that of a small molecular monomer containing a sulfonic acid group, and fewer reaction byproducts are generated; the polymerization reaction can be smoothly carried out. The sulfonate grafted polyether-polyester-polyamide block copolymer elastomer is obtained through one-step melt polymerization, and has the advantages of being simple and convenient in synthesis method, low in production cost, high in strength, adjustable in performance and the like.