47results about How to "Aggregation tight" patented technology

The invention discloses a method for extracting the characteristic of a natural image based on dispersion-constrained non-negative sparse coding, which comprises the following steps of: partitioning an image into blocks, reducing dimensions by means of 2D-PCA, non-negative processing image data, initializing a wavelet characteristic base based on 2D-Gabor, defining the specific value between intra-class dispersion and extra-class dispersion of a sparsity coefficient, training a DCB-NNSC characteristic base, and image identifying based on the DCB-NNSC characteristic base, etc. The method has the advantages of not only being capable of imitating the receptive field characteristic of a V1 region nerve cell of a human eye primary vision system to effectively extract the local characteristic of the image; but also being capable of extracting the characteristic of the image with clearer directionality and edge characteristic compared with a standard non-negative sparse coding arithmetic; leading the intra-class data of the characteristic coefficient to be more closely polymerized together to increase an extra-class distance as much as possible with the least constraint of specific valuebetween the intra-class dispersion and the extra-class dispersion of the sparsity coefficient; and being capable of improving the identification performance in the image identification.

The invention relates to a starch and polylactic acid composite material and a preparation method thereof. The composite material comprises, by weight, 20 to 75 parts of modified starch, 10 to 65 parts of polylactic resins, 2 to 10 parts of hydroxy-terminated lactic acid oligomer with molecular weight of 800 to 2000, 1 to 10 parts of plasticizers, 0.1 to 1.0 part of aliphatic chain extenders, 0.5 to 2 parts of talcum powders and 0.1 to 3 parts of auxiliaries. The preparation method includes that firstly the modified starch, the polylactic acids, the hydroxy-terminated lactic acid oligomer, the plasticizers, the talcum powders, lubricating agents and coupling agents are blended together in a homogenizer to obtain a blend, and then a mixed material of the blend and the chain extenders is added in a twin-screw extruder to be subjected to melt extrusion, cooling and granulation to obtain the starch and polylactic acid composite material. The starch and polylactic acid composite material has the advantages that the compatibility, toughness and heat resistance are good, the cost is low, the biodegradation can be completely achieved, the preparation technique process is simple, the 'three wastes' emission is absent, and the mass production can be achieved.

A nano-class composite nylon material is prepared through mixing one or more nylon monomers in fused state with one on more nano inorganic material, dewatering, and anionic polymerizing under existance of alkaline catalyst and cocatalyst. Its advantages are high strength, rigidity and size stability, and simple process.

The invention discloses PVC (polyvinyl chloride) foamed artificial leather and a preparation method thereof. The PVC foamed artificial leather comprises a fabric base material, a foaming layer and a surface layer which are attached from inside to outside sequentially, wherein the foaming layer comprises components in parts by weight as follows: 95-105 parts of PVC resin, 75-85 parts of filling powder, 75-85 parts of a plasticizer, 3.5-4.0 parts of a stabilizer, 4.5-5.5 parts of a foaming agent and 9.5-10.5 parts of masterbatch; the surface layer comprises components in parts by weight as follows: 65-75 parts of PVC resin, 6-8 parts of filling powder, 46-52 parts of a plasticizer, 1.5-3 parts of a stabilizer and 4.5-5.5 parts of masterbatch. The preparation method comprises steps as follows: (1), blending; (2), mixing, open milling and filtering; (3), calendering attachment; (4), cooling; (5), foaming; (6), embossing, cooling and rolling-up to obtain a finished PVC foamed artificial leather product. The artificial leather prepared with the method feels good, and is good in texture, high in breathability and good in wear resistance.

The invention discloses a video positioning method and device and electronic equipment. The method comprises the steps of obtaining a video and a statement; performing feature extraction on the videoand the statement respectively to obtain corresponding video clip features and word features; fusing the video clip features and the word features to obtain fusion features; aggregating and associating the fusion features layer by layer based on a time sequence through a time sequence convolutional neural network to obtain a multi-layer time sequence convolutional feature map; and performing semantic modulation on each layer of feature map in the multi-layer time sequence convolution feature map to obtain a modulated feature map, and performing time sequence convolution operation on the modulated feature map to obtain a target video clip related to semantics of the statement. According to the method and the device, the target video clip related to semanteme of the input statement can be quickly and accurately positioned.

The invention relates to sound insulating glass and a preparation method thereof, in particular to sound insulating PVB (polyvinyl butyral) laminated glass and a preparation method thereof. The sound insulating PVB laminated glass comprises a first glass substrate, a second glass substrate, a PVB film between the first glass substrate and the second glass substrate as well as polystyrene films located between the first glass substrate and the PVB film as well as between the second glass substrate and the PVB film, wherein the first glass substrate and the second glass substrate are arranged vertically. The preparation method of the sound insulating PVB laminated glass comprises the following steps: (1) cleaning of the glass substrate; (2) preparation of the polystyrene films; (3) combining operation: the PVB film is arranged in a combining chamber for combination of the glass substrates, the PVB film and the polystyrene films; (4) prepressing for exhausting; (5) high-pressure molding. The prepared PVB laminated glass has good mechanical property, impact resistance and good sound insulating effect, the PVB film cannot fall off the glass when the laminated glass meets external impact or the external environmental temperature changes acutely, and the service life is long.

The invention discloses a preparation method of transmission electron microscope samples of atmospheric particulates, and belongs to the preparation method of atmospheric particulate samples. The atmospheric particulates are collected by a sampler, a collecting membrane with sample particles is immersed in an ethanol solution and enriched sample particles are obtained through ultrasound concussion; enriched sample particles are subjected to gradient penetration of a mixture of ethanol and an embedding medium under a certain vacuum degree, and then polymerized for 48 hours at the temperature of 60 DEG C after stood for 8 hours under vacuum, and embedding blocks of the polymerized particulates are subjected to block repairing and slicing, and finally ultrathin section samples of the atmospheric particulates are obtained. The preparation method of the transmission electron microscope samples of the atmospheric particulates disclosed by the invention effectively eliminates residual gases among the particulates in the embedding process, and better fixes structure states of the particulates. The observation of a transmission electron microscope on the section samples of the atmospheric particulates can provide a technical way for a formation mechanism of the internal structures of the atmospheric particulates, and inference research of a formation reaction mechanism of the atmospheric particulates. The method is applicable to atmospheric particulates, coal particulates and the like.

The present invention discloses surface-organically-modified boron nitride powder, wherein a hydantoin epoxy resin cross-linked polymerization product layer is coated on the particle surface, the hydantoin epoxy resin cross-linked polymerization product content in the surface-organically-modified boron nitride powder is 5-10 wt.%, and the raw materials for preparing the surface-organically-modified boron nitride powder comprise 20-30 wt.% of boron nitride, 1-3 wt.% of a hydantoin epoxy resin, 0.1-2 wt.% of an organic amine curing agent, and the balance of water. According to the present invention, the surface-organically-modified boron nitride powder has characteristics of good compatibility with polymer substrates and easy dispersion in the substrate, and can maintain good construction or processing fluidity under the high filling rate of 47.5 wt.%, and the thermal conductivity of the prepared epoxy composite material is up to 2.42 W / m.K.

The invention discloses a combined type magnetic frame. The combined type magnetic frame provided by the invention comprises a magnet frame and a micro test tube frame. The magnet frame mainly comprises a magnet frame base and a column body part which is perpendicularly fixed to the magnet frame base and internally provided with magnets. The micro test tube frame mainly comprises a micro test tube frame flat plate and a column body part which is perpendicularly fixed to the lower end of the micro test tube frame flat plate and provided with a cavity structure. The column body part which is provided with the cavity structure is matched with the column body part which is perpendicularly fixed to the magnet frame base and internally provided with the magnets, so that separation and combination of the magnet frame and the micro test tube frame are achieved. The micro test tube frame flat plate is provided with micro test tube holes used for holding micro test tubes. The micro test tube holes are internally provided with flanges and boss bodies. Through the combined type magnetic frame provided by the invention, a user can conduct overturning, inclining, rotating, vibrating and other operations with the micro test tubes and the magnetic frame as a whole, and the work efficiency and the operation uniformity of a micro test tube chamber are improved exponentially.

The invention discloses a production method of flame-retardant and droplet-resistant nylon 6 filament, which belongs to the field of chemical industry and includes melt polymerization, slice preparation, spinning, drawing and post-processing in sequence, heating caprolactam into a molten state, and melting the already Add lactam, initiator, stabilizer and graphene evenly into the polymerization tube; heat to control the temperature of the first polymerization zone at 130-150°C, the temperature of the second polymerization zone at 200-220°C, and the temperature of the third polymerization zone The temperature is 250-270°C, the temperature of the polymerization zone in the fourth section is controlled at 230-250°C, and the temperature of the polymerization zone in the fifth section is controlled at 210-230°C; stir evenly, and enter the slice preparation process after the polymerization is completed. The beneficial effects of the present invention are as follows: graphene powder is introduced in the melt polymerization stage, so that graphene and nylon 6 are fully mixed and contacted, and when nylon 6 is burned, the carbon ash produced by graphene combustion will cover nylon 6 melt droplets, preventing nylon 6 The formation of molten droplets, coated on the surface of nylon 6 fiber, also prevents further burning inside the fiber.

The invention discloses a text recall system and method based on similarity retrieval. The method comprises the following steps: S1, receiving a query text input by a user; s2, extracting a short text semantic feature vector for the short text, and extracting a long text semantic feature vector for the long text; s3, constructing an initial vector topological structure; s4, performing dynamic adjustment on the initial vector topological structure in the vector library system by adopting an improved neural topological optimization algorithm; s5, generating local topological feature representation of each short text and each long text based on the optimized vector topological structure; s6, determining potential associated fragments of the query request text; s7, sorting the query request texts; and S8, returning a plurality of query request texts with the highest similarity in the sorting result as a retrieval result and outputting the retrieval result. According to the method, the efficiency and the accuracy of text recall are remarkably improved.

The invention relates to a preparation method of high-color-fastness water-based acrylate resin color paste, the resin color paste, and application and the use method of the resin color paste. The water-based acrylate resin color paste is a polymer with a core-shell structure, wherein an inner core polymer is a composition of an acrylate polymer and a pigment, and a shell polymer is a water-basedacrylate polymer synthesized in an emulsion polymerization manner. According to the invention, the pigment is added in a reaction process, a molecular chain in a polymer solution synthesized by solution polymerization and the pigment are dispersed more uniformly and combined more tightly, and after the polymer is self-emulsified to form emulsion particles, the pigment is uniformly dispersed and wrapped in the emulsion particles; and thus, the situation of phase separation caused by nonuniform pigment dispersion and pigment aggregation in the film forming process of the paste is reduced, and the color fastness of the water-based acrylate resin color paste is greatly improved.

The invention relates to the field of an antirust paint, in particular to an antirust paint added with magnet powder for food production machine for a food production machine. The antirust paint is prepared from the following raw materials in parts by weight: 30 to 32 parts of acrylic emulsion, 4 to 6 parts of dimethyl silicone oil, 6 to 10 parts of oxaloacetic acid, 4 to 6 parts of isocitric acid, 4 to 6 parts of cyclohexanamine benzoate, 10 to 16 parts of boric acid, 1 to 2 parts of medical chalk ash, 1 to 2 parts of dibenzothiazyl disulfide, 1.5 to 1.5 parts of catechin and 3 to 5 parts of modified magnet powder. The antirust paint provided by the invention has the advantages of non-toxic and antibacterial properties, acid and alkali and salt spray corrosion resistance, low kinematic viscosity, close polymerization between raw materials, very high surface hardness after drying, scratch and impact resistance, oil and water immersion resistance, no peeling and bubbling in long-term oil and water immersion, and service life 3 to 4 years longer than the ordinary antirust paint.

The invention aims to solve the problems in the prior art, provide a PVC (Poly Vinyl Chloride) external lubricant and a manufacturing process thereof, reduce the reaction temperature in the machining process and optimize the proportioning of a product. For fulfilling the aims, the manufacturing process comprises the following steps of: firstly, carrying out recovery processing on waste liquor generated in the chemical industry to obtain fumaric acid; in the machining process, firstly, using the fumaric acid as mother liquor according to a certain ratio, then adding polyatomic alcohol according to the ratio, adding pentaerythritol proportioned according to the ratio after sufficiently stirring, and finally, adding stearic acid to carry out esterification; then carrying out polymerization at a high temperature of 150 DEG C to 160 DEG C; after polymerization, carrying out vacuum dealcoholization at a high temperature of 200 DEG C; and slicing after cooling, wherein in the whole machiningprocess, no catalyst is added. The manufacturing process has the beneficial effects of low reaction temperature, good polymerization effect and high finished product conversion rate due to the adoption of the technical scheme.

The invention provides an antibacterial wood-like board for indoor decoration and a preparation method. The antibacterial wood-like board is prepared from an antibacterial wood-like layer formed on the surface of a polypropylene substrate through surface co-extrusion, the polypropylene substrate is prepared from polypropylene matrix resin, a coupling agent, a bulking agent and an antioxidant through mixing and extrusion, and the antibacterial wood-like layer is prepared as follows: coating natural clinoptilolite with graphene oxide, adding the coated natural clinoptilolite and hydrazine hydrate to a silver salt solution to react to prepare antibacterial filler, then, mixing the antibacterial filler with ASA weather-resistant resin and wood-like pigment and performing extrusion to prepare the antibacterial wood-like layer. In the antibacterial wood-like board, nano-silver and graphene in the antibacterial filler are closely combined and cannot fall off easily, the antibacterial effect is more lasting, the obtained wood-like plate is endowed with good antibacterial and sterilization characteristics, meanwhile, large granules are realized through two times of fixed loading, uniform dispersion is facilitated, and production and processing are easy.

The invention discloses a method for preparing a nanofiber-based composite nanofiltration membrane by low-temperature reverse interface polymerization, which is characterized in that it comprises: electrospinning a polymer solution to obtain a nanofiber non-woven fabric, which is obtained after cold pressing The nanofiber porous base membrane; the surface of the nanofiber porous base membrane is infiltrated with a low-temperature oil phase monomer solution; then the water phase monomer solution is added for reverse interfacial polymerization reaction; the nanofiber base composite nanofiltration membrane is obtained after heat treatment. The invention reduces the volatilization rate of the oil phase under low temperature conditions by controlling the temperature of the oil phase solution, provides a complete and uniform reaction interface for the reverse interface polymerization, and overcomes the skin layer inherent in the reverse interface polymerization caused by the rapid volatilization of the oil phase Defects and infiltration problems, the thickness, uniformity and density of the functional barrier layer are optimized by controlling the temperature of the oil phase solution and the polymerization parameters of the reverse interface, thereby enhancing the nanofiltration performance of the composite membrane.

The invention discloses a method for carrying out microcontact printing by employing a plane conjugate phthalocyanine-porphyrin coordination compound. The method comprises the following specific steps: with a dichloromethane solution of 5,10,15,20-parachloro-phenyl porphyrin zinc-hexabutoxyphthalocyanine zinc as a printing agent for microcontact printing, transferring a pattern of a PDMS stamp to a polymethyl methacrylate substrate, and adsorbing reduced copper on the substrate to obtain a fine metal pattern. A metal pattern is prepared by taking the dichloromethane solution of 5,10,15,20-parachloro-phenyl porphyrin zinc-hexabutoxyphthalocyanine zinc as microcontact printing ink on the surface of the polymethyl methacrylate substrate which is commonly used in the electron industry, so that the method is available in raw materials, low in cost and stable, and has great potential in industrial application, and a new idea is provided for the microcontact printing industry.

The present invention discloses a wear-resistant liquid-cooled cable with an ultra-large current load for new energy, and belongs to the technical field of liquid-cooled cable processing. The present invention is used to solve the technical problem in the prior art that the wear resistance of liquid-cooled cables and the heat dissipation efficiency in high-temperature environments need to be further improved. A wear-resistant liquid-cooled cable with an ultra-large current load for new energy includes a plurality of conductors, and the exteriors of the plurality of conductors are sequentially provided with an insulating layer, a shielding layer, and an outer sheath layer; a heat exchange layer composed of a plurality of heat exchange tubes is provided between the shielding layer and the outer sheath layer, and the plurality of heat exchange tubes are all arranged in a spiral shape. The present invention improves the heat exchange performance inside the cable by preparing the insulating layer using a thermally conductive filler, and improves the thermal insulation and wear resistance of the cable outer sheath layer by preparing the cable outer sheath layer by synthesizing a composite polyolefin, thereby obtaining a liquid-cooled cable with high heat exchange efficiency inside, wear resistance outside, and suitable for high temperatures.

The invention relates to a preparation method of a degradable strapping tape material and belongs to the technical field of packaging materials. Polylactic acid is treated by argon plasma and graftedwith acrylic acid, and a high polymer material surface is subjected to plasma treatment to be modified; the plasma initiates surface grafting, the surface of polylactic acid can be hydrophilic and keeps hydrophilic for a longer time, thus, biological compatibility of the prepared strapping tape material is improved, and the degradation cycle of the prepared strapping tape material is easy to control; polypropylene is subjected to plasma treatment by plasma polymerization, and a thin film is formed on the surface of a graft copolymer and has good heat stability, good cohesiveness with the material, high strength, uniform and complete film surface and chemical corrosion resistance; polylactic acid is an aliphatic polyester high polymer material which is completely degradable and environmentally friendly, is prepared by polymerization of lactic acid obtained by cereal fermentation and can be completely decomposed under the actions of microorganisms, water, acid, alkali and the like afterbeing discarded.

The invention relates to a starch and polylactic acid composite material and a preparation method thereof. The composite material comprises, by weight, 20 to 75 parts of modified starch, 10 to 65 parts of polylactic resins, 2 to 10 parts of hydroxy-terminated lactic acid oligomer with molecular weight of 800 to 2000, 1 to 10 parts of plasticizers, 0.1 to 1.0 part of aliphatic chain extenders, 0.5 to 2 parts of talcum powders and 0.1 to 3 parts of auxiliaries. The preparation method includes that firstly the modified starch, the polylactic acids, the hydroxy-terminated lactic acid oligomer, the plasticizers, the talcum powders, lubricating agents and coupling agents are blended together in a homogenizer to obtain a blend, and then a mixed material of the blend and the chain extenders is added in a twin-screw extruder to be subjected to melt extrusion, cooling and granulation to obtain the starch and polylactic acid composite material. The starch and polylactic acid composite material has the advantages that the compatibility, toughness and heat resistance are good, the cost is low, the biodegradation can be completely achieved, the preparation technique process is simple, the 'three wastes' emission is absent, and the mass production can be achieved.

The invention discloses a flexible sensor electrode preparation method, a flexible sensor electrode and a flexible sensor, and the method comprises the steps: carrying out the silane modification of agraphene oxide film, and obtaining a modified reduced graphene oxide film; and adsorbing a medium material on the modified reduced graphene oxide film, and modifying biological enzyme on the modifiedreduced graphene oxide film adsorbed with the medium material. The preparation method is simple in process, a medium layer and the electrode body can be tightly combined, and the flexibility of the sensor electrode can be realized.

The invention discloses PVC (polyvinyl chloride) foamed artificial leather and a preparation method thereof. The PVC foamed artificial leather comprises a fabric base material, a foaming layer and a surface layer which are attached from inside to outside sequentially, wherein the foaming layer comprises components in parts by weight as follows: 95-105 parts of PVC resin, 75-85 parts of filling powder, 75-85 parts of a plasticizer, 3.5-4.0 parts of a stabilizer, 4.5-5.5 parts of a foaming agent and 9.5-10.5 parts of masterbatch; the surface layer comprises components in parts by weight as follows: 65-75 parts of PVC resin, 6-8 parts of filling powder, 46-52 parts of a plasticizer, 1.5-3 parts of a stabilizer and 4.5-5.5 parts of masterbatch. The preparation method comprises steps as follows: (1), blending; (2), mixing, open milling and filtering; (3), calendering attachment; (4), cooling; (5), foaming; (6), embossing, cooling and rolling-up to obtain a finished PVC foamed artificial leather product. The artificial leather prepared with the method feels good, and is good in texture, high in breathability and good in wear resistance.

The invention belongs to the technical field of phospholipid membrane monolithic columns, and particularly relates to a preparation method and application of a bionic phospholipid membrane monolithic column for screening and separating antimicrobial peptides. The bionic phospholipid membrane monolithic column is prepared from phospholipid monomers or mixed phospholipids, and is directly prepared in a quartz capillary through an in-situ polymerization reaction, so that the monolithic column has richer phospholipid types and a more complex phospholipid membrane structure, a biological membrane environment can be more accurately simulated, and the separation efficiency and selectivity are improved; the obtained mixed phospholipid membrane monolithic column is relatively good in polymerization condition, is tightly combined with a capillary wall, is excellent in structural performance, can realize separation of alkyl benzophenone compounds, has non-specific adsorption resistance, can also be used for separation, purification and screening of antibacterial peptides, and has wide application prospects. The method has important significance, and solves the problems of low efficiency, high cost, activity loss and the like existing in the conventional antibacterial peptide screening and purifying method.

The invention belongs to the technical field of solid waste resource utilization, and particularly relates to a liquid degradable mulching film produced by utilizing a humus product as well as a preparation method and application of the liquid degradable mulching film. Rural mixed organic waste humus products are adopted as raw materials, active organic components in the raw materials are extracted through an alkali extracting agent, and then a film-forming agent, a plasticizer, a cross-linking agent and a reinforcing agent are added. The film-forming agent and the active organic component form a stable and dense three-dimensional network macromolecular chain polymer film structure through the cross-linking polymerization effect of the cross-linking agent; plasticizer molecules are inserted among molecular chains of the polymer film structure, so that the acting force among the molecular chains is weakened, the mobility of the molecular chains is increased, and the crystallinity of the molecular chains is reduced, thereby increasing the plasticity of the polymer film structure, adjusting the flexibility of the polymer film structure and improving the mechanical property of the polymer film structure; the reinforcing agent and the polymer form hydrogen bonds and are tightly combined, so that the mechanical property of the polymer membrane structure is improved.

The invention relates to sound insulating glass and a preparation method thereof, in particular to sound insulating PVB (polyvinyl butyral) laminated glass and a preparation method thereof. The sound insulating PVB laminated glass comprises a first glass substrate, a second glass substrate, a PVB film between the first glass substrate and the second glass substrate as well as polystyrene films located between the first glass substrate and the PVB film as well as between the second glass substrate and the PVB film, wherein the first glass substrate and the second glass substrate are arranged vertically. The preparation method of the sound insulating PVB laminated glass comprises the following steps: (1) cleaning of the glass substrate; (2) preparation of the polystyrene films; (3) combining operation: the PVB film is arranged in a combining chamber for combination of the glass substrates, the PVB film and the polystyrene films; (4) prepressing for exhausting; (5) high-pressure molding. The prepared PVB laminated glass has good mechanical property, impact resistance and good sound insulating effect, the PVB film cannot fall off the glass when the laminated glass meets external impact or the external environmental temperature changes acutely, and the service life is long.

The invention discloses a method for carrying out microcontact printing by employing a plane conjugate phthalocyanine-porphyrin coordination compound. The method comprises the following specific steps: with a dichloromethane solution of 5,10,15,20-parachloro-phenyl porphyrin zinc-hexabutoxyphthalocyanine zinc as a printing agent for microcontact printing, transferring a pattern of a PDMS stamp to a polymethyl methacrylate substrate, and adsorbing reduced copper on the substrate to obtain a fine metal pattern. A metal pattern is prepared by taking the dichloromethane solution of 5,10,15,20-parachloro-phenyl porphyrin zinc-hexabutoxyphthalocyanine zinc as microcontact printing ink on the surface of the polymethyl methacrylate substrate which is commonly used in the electron industry, so that the method is available in raw materials, low in cost and stable, and has great potential in industrial application, and a new idea is provided for the microcontact printing industry.

The invention discloses a video positioning method, device and electronic equipment. Wherein, the method includes: acquiring video and sentences; performing feature extraction on the video and the sentence respectively to obtain corresponding video segment features and word features; fusing the video segment features and the word features to obtain fusion features ; Aggregating and associating the fusion feature layer by layer based on time series through a time series convolutional neural network to obtain a multi-layer time series convolution feature map; performing semantic modulation on each layer feature map in the multi-layer time series convolution feature map to obtain modulation After the feature map, and perform temporal convolution operation on the modulated feature map to obtain the target video segment related to the semantics of the sentence. Through the present invention, it is possible to quickly and accurately locate the target video segment related to the semantics of the input sentence.

The invention aims to solve the problems in the prior art, provide a PVC (Poly Vinyl Chloride) external lubricant and a manufacturing process thereof, reduce the reaction temperature in the machining process and optimize the proportioning of a product. For fulfilling the aims, the manufacturing process comprises the following steps of: firstly, carrying out recovery processing on waste liquor generated in the chemical industry to obtain fumaric acid; in the machining process, firstly, using the fumaric acid as mother liquor according to a certain ratio, then adding polyatomic alcohol according to the ratio, adding pentaerythritol proportioned according to the ratio after sufficiently stirring, and finally, adding stearic acid to carry out esterification; then carrying out polymerization at a high temperature of 150 DEG C to 160 DEG C; after polymerization, carrying out vacuum dealcoholization at a high temperature of 200 DEG C; and slicing after cooling, wherein in the whole machining process, no catalyst is added. The manufacturing process has the beneficial effects of low reaction temperature, good polymerization effect and high finished product conversion rate due to the adoption of the technical scheme.

The invention discloses equipment for stabilizing a steel tube punch pin. The equipment for stabilizing the steel tube punch pin comprises a machine body, a punch pin mechanism, a long machine box, asmall machine box and a stabilizing mechanism. The punch pin mechanism is located in the front of the machine body, and a part of the punch pin mechanism is located in the machine body; the long machine box is horizontally arranged in the front of the machine body; the small machine box is located in the front of the long machine box and directly faces the down position, rollers are arranged underthe front ends of the small machine box and the long machine box, and the roller are used for feeding steel tubes into the punch pin mechanism; and the stabilizing mechanism is located between the small machine box and the machine body. The stabilizing mechanism fixes the position of the steel tubes, can counteract the vibration generated in the operation process of the steel tubes, so that the steel tube punch pin is stabilized, and the operation precision of the steel tube punch pin is improved.

The present invention belongs to the field of material technology, and in particular to a method for preparing an efficient low-phosphorus corrosion inhibitor. The present invention dissolves a soluble zinc salt and an imidazole ligand in methanol / water and mixes them evenly, and then adds a tris hydrochloric acid buffer solution to the mixed solution by ultrasonic treatment to obtain a polydopamine-coated zinc metal organic framework material, and finally obtains a polydopamine-coated zinc metal organic framework functionalized with a thiadiazole dimer by adding 2,5-dimercaptothiadiazole dimer and 1-aminopropyl-3-methylimidazole hexafluorophosphate. By introducing hydroxyl and sulfhydryl groups on the surface of the corrosion inhibitor, the binding ability of the corrosion inhibitor to the metal surface can be effectively improved, and the two can be more closely combined, reflecting an efficient slow-release effect.