51results about How to "Conducive to in-depth" patented technology

The invention discloses a method and system for measuring the in-class concentration degree of students. The method comprises the steps that the concentration degrees of the students in multiple measurement links in class are calculated respectively via student terminals to obtain an accumulated value of the concentration degree of each student in the multiple measurement links; the accumulated values of different students are combined and calculated to obtain the percentage of the concentration degree of each student; and the concentration degree of each student is pushed to a teacher terminal and displayed. According to the method and system, the multiple measurement links are created to measure the in-class concentration degree of the students, the in-class concentration degree of the students is quantified and measured in the comprehensive, systematic, intelligent and feasible manner, and the method and system are conducive to deepening and popularizing of teaching practice; and the method is simple and effective, and a full-digital, informationized and intelligent measurement process is realized.

The invention discloses a quick qualitative and quantitative method for oligosaccharide in breast milk. The quick qualitative and quantitative method mainly includes steps of 1, pretreating samples, to be more specific, removing fat and proteins from 150-250 micro-l of breast milk to obtain ultimate supernatant, adding ultra-pure water into the supernatant and diluting the supernatant to obtain the loaded samples; 2, establishing standard curves for standard substances by the aid of ultrahigh-performance liquid chromatography and mass spectrometry; 3, separating different components of the oligosaccharide in the breast milk in the loaded samples by the aid of ultrahigh-performance liquid mass spectrometry and carrying out quantitative analysis by the aid of mass spectrometry combined with the standard curves so as to obtain the content of the oligosaccharide in the breast milk. The ultrahigh-performance liquid chromatography is implemented by the aid of amino chromatographic columns with the sizes of 2.1*100 mm and 1.7 micrometers, 8-10 mmol / L of ammonium formate solution (A) and acetonitrile (B), and the ammonium formate solution (A) and the acetonitrile (B) are used as mobile phases; gradient elution programs are carried out by the aid of 95%-75% of B for 0-10 min or are carried out by the aid of 75% of B for 10-15 min or are carried out by the aid of 75%-65% of B for 15-20 min or are carried out by the aid of 65%-10% of B for 20-21 min or are carried out by the aid of 10% of B for 21-24 min or are carried out by the aid of 10%-95% of B for 24-25 min or are carried out by the aid of 95% of B for 25-35 min; the flow rates are 0.3 mL / min, and the column temperatures are 40-60 DEG C. The quick qualitative and quantitative method has the advantage that 12 types of oligosaccharide in the breast milk can be quickly detected by the aid of the quick qualitative and quantitative method and can be quantified by the aid of the quick qualitative and quantitative method.

The invention discloses an automatic charging interface device for an electric vehicle, and belongs to the technical field of electric vehicle charging devices. The automatic charging interface device comprises a charging interface A which is fixed to the back end of the electric vehicle and connected with a battery pack and a charging interface B connected with a charging station power supply. The charging interface A comprises two contacts connected with a positive electrode and a negative electrode of the battery pack of the electric vehicle and a switch connected with a control panel of the electric vehicle; and the charging interface B is arranged at the tail end of a charging power supply special for the electric vehicle and comprises a charging contact, a switch connected with a charging station controller and a telescopic device which comprises springs. According to the automatic charging interface device, automatic charging of the electric vehicle can be achieved without manual operation, the process is convenient and rapid to operate, and the charging efficiency of the electric vehicle can be improved.

The invention discloses a two-stage biomass hydrothermal catalytic activation reaction device and belongs to the field of a biomass hydrothermal technology. The device comprises a biomass high-pressure reaction kettle reactor and a vertical type activation furnace reactor which are communicated with each other through a packing auger drying bed; the biomass high-pressure reaction kettle reactor comprises a hydrothermal reaction cylinder, an additive loading tank and a biomass feeding pipe; under the condition of a carbon dioxide aqueous solution, the additive reacts with hydrogen ions in the aqueous solution to generate metal cations, so that biomass thermal decomposition is catalyzed to generate a high-quality liquid product; the biomass high-pressure reaction kettle reactor is also used for performing initial activation on hydrothermal coke; the vertical type activation furnace reactor comprises an activation reaction cylinder, a high-temperature activation gas nozzle, a round drainage plate and a ring-shaped drainage plate, and is used for preparing super activated carbon from the hydrothermal coke. The device is clever in design, can prepare supercapacitor electrode carbon and high-quality liquid products simultaneously by utilizing two-stage biomass hydrothermal catalytic activation reaction, and is high in energy utilization rate and high in production efficiency.

The invention discloses a chain tilling machine. The chain tilling machine comprises a machine frame, a transmission shaft fixed to the machine frame, transmission gears arranged on the transmission shaft, a square beam hinged to the transmission shaft, tensioning frames connected with the square beam, driven gear shafts, driven gears, chains, tilling blades and hydraulic rods, wherein the driven gear shafts and the driven gears are arranged on the tensioning frames, the chains are used for connecting the transmission gears and the driven gears, the tilling blades are arranged on the chains, and the two ends of each hydraulic rod are hinged to the square beam and the machine frame respectively. The square beam can buffer and reduce reverse impact force on the machine when the tilling blades collide with hard objects in a field, a transmission device of the machine is protected, and the service life of the machine is prolonged. The tensioning frames which are independent of one another easily increase the depth of soil loosening. The chain tilling machine can smash crop straw and weed at a time and mixes the smashed crop straw and weed into soil, and completes deep loosening, clod disintegrating, land formation and other tillage operation.

The invention relates to a bamboo leaf flavonoid composite liposome and its preparation method and application. The bamboo leaf flavonoid composite liposome contains ingredients according to the following weight ratio of bamboo leaf flavonoid to a complex agent to a membrane material to a propping agent to an antioxidant to a solubilizer being 0.1-2:0.1-2:0.2-5:0.02-0.5:0.01-0.1:0.1-2. By effectively coating bamboo leaf flavonoid, stability and integrity of the functional component are protected. Hyaluronic acid with an outstanding moisturizing effect is compounded during the coating process. Thus, system compatibility of the prepared bamboo leaf flavonoid composite liposome in the development of skin care products is enhanced. Meanwhile, unique carrying capacity and slow release capability of the liposome can promote absorption and long-acting care of the bamboo leaf flavonoid composite liposome in the skin, and effects of skin miniature retention, sun protection, whitening, antisenescence and the like are enhanced.

The root of Chinese yam under ground is 1m in length, and is very tender, which makes the digging and picking be time and labor consuming and damage the Chinese yam, the invention provides a hole cultivating method for Chinese yam, drilling vertically in the field with special punch, sowing the Chinese yam seed on the aperture mulch film after mulch film enclosing to make Chinese yam grow in suspended state after crossing the mulch film, which not only improves the Chinese yam quality greatly, but also make the Chinese yam picking and recovery more easier, and at the same time avoids the damage caused by digging.

The invention discloses a carbon dioxide cured prefabricated water-permeable concrete and a preparation method thereof. The water-permeable concrete is composed of following components in parts by weight: 55 to 80 parts of regenerated aggregate, 7 to 30 parts of nickel slag sand, 18 to 40 parts of cementing material, 5 to 25 parts of water, 0.01 to 2 parts of naphthalene water reducer, 0 to 0.02 part of cellulose ether, and 0 to 0.01 part of welan gum. The cementing material is composed of following components in parts by weight: 70 to 90 parts of common silicate cement, 5 to 15 parts of fly ash, 10 to 30 parts of steel slag, 5 to 15 parts of lime or lime slag, and 0.02 to 1 part of nano calcium carbonate. The technology is simple, the structure advantage of water-permeable concrete and the properties of industrial byproducts such as nickel slag, steel slag, fly ash, and the like are fully utilized; carbon dioxide curing is utilized to realize rapid, efficient and environmentally friendly production; high strength, durable and water permeable concrete is obtained, the energy consumption is reduced, the industrial tail gas, metallurgy slag, and building waste are effectively utilized, and good economic benefits, social benefits, and environmental benefits are generated.

The invention relates to the technical field of leather manufacturing process, and provides a sponge foam soft-type full-grain flat leather production process. According to the sponge foam soft-type full-grain flat leather production process, low-grade heavy-weight cowhide is used as raw leather, a traditional wet dyeing and finishing process framework is broken through, first neutralization and filling is carried out after a softening process, then chrome retanning is carried out, second neutralization and filling is carried out, meanwhile a certain amount of grease is added in the softening,neutralization and filling processes, and materials with selective filling are mainly adopted in the filling process to finally prepare the high-quality and high-utilization full-grain flat leather with good softness, good foam feeling, a uniform and fine grain surface and no obvious position difference. The sponge foam soft-type full-grain flat leather production process effectively solves the problems of coarse grain surfaces, obvious disability, large grain size, a low utilization rate and the like existing in the processing process of the low-grade heavy-weight cowhide, reduces the production cost of manufacturing high-quality and high-utilization sponge foam soft-type full-grain flat leather for enterprises, improves the utilization rate of the low-grade cowhide and the value of finished leather, and brings considerable economic benefits to the enterprises.

The invention discloses a method for tanning sheepskin through synergy of organic amine and an epoxy resin composition tanning agent. The method comprises the steps that softened or acid removing sheepskin is processed by an organic amine bath lotion, and then the epoxy resin composition tanning agent is added for tanning. As the organic amine permeates into skin fibers, the organic amine can cooperate with the epoxy resin composition tanning agent to make amido of the organic amine and amido on skin collagen fibers have a reaction, a net-shaped crosslink structure is formed, and accordingly the damp heat resistance stability of leather is improved, the epoxy resin can serve as the main tanning agent to tan the sheepskin, the tanning performance is improved, the tanned sheepskin leather isclear in grain surface, rich in body, pure white in color and good in yellowing resistance performance, and the storage life of the tanned leather is longer than six months at the room temperature.

The invention belongs to the field of preparation of chlorosulfonated polyethylene, and in particular relates to a method for preparing chlorosulfonated polyethylene in a rotary reactor, which comprises adding chlorinated polyethylene powder and an anti-caking agent into the drum of the rotary reactor, The amount of anti-adhesive agent is 2-8% of the mass of chlorinated polyethylene powder; start the drum of the rotary reactor, fill it with hot nitrogen after vacuuming, then release the pressure, repeat the above operation several times; after vacuuming Add the initiator, feed the mixed gas of chlorine and sulfur dioxide, control the speed of the mixed gas to react, and control the reaction temperature ≤ 80°C in the whole process; move the reaction product to purified water and wash it repeatedly until the pH of the washing water is > 6, and then put The material was vacuum filtered and dried to obtain chlorosulfonated polyethylene powder. The invention can effectively solve the problems of scorching and discoloration of materials, serious equipment corrosion and high production cost in the existing CSM production process.

The invention provides an on-line oil coating device for steel stranded wires. The on-line oil coating device comprises an upper cover and a lower cover which are buckled together in a sealed manner, wherein a sealed high-pressure cavity is arranged between the upper cover and the lower cover, and a front squeezing mechanism and a rear squeezing mechanism are arranged in the high-pressure cavity; the high-pressure cavity is provided with an oil feeding nozzle; and the oil feeding nozzle and an oil coating gun are movably arranged together. By the on-line oil coating device, the steel stranded wires can be coated with oil on line; and the oil coating device adopts a high-pressure cavity structure, so that the oil can go deep into slits between wire strands, the oil can be comprehensively coated, and an oil coating effect is good. The oil coating device can be replaced according to a specific situation; and the upper cover and the lower cover of the oil coating device can be movably opened and closed, so that the oil coating device is easy to machine and use. The oil coating gun and the oil feeding nozzle are convenient to dismount because of movable connection; after the oil coating gun and the oil feeding nozzle are mounted, a sealing effect is good; and the front squeezing mechanism and the rear squeezing mechanism have functions of pressing the oil and scraping the oil. The on-line oil coating device is rational in structural design, good in using effect, convenient to maintain and replace and very suitable for popularization and execution.

The invention provides a method for preparing a double-layered pore-structured SOFC anode by an impregnation method, relates to a method for preparing an SOFC anode, and aims to solve the technical problem of low electrochemical activity caused by the nonuniform distribution of metallic nickel nano particles, in a porous YSZ (yttria stabilized zirconia) supporter, existing during the impregnation process when the SOFC anode is prepared in the conventional impregnation method. The method comprises the following steps: (1), preparing an YSZ anode supporter adopting flours as pore-forming agents; (2), preparing a porous YSZ anode supporter with a double-layered pore structure and poriness; (3), preparing a compact YSZ electrolyte membrane; (4), preparing a compact YSZ electrolyte surface cathode; (5), preparing the double-layered pore-structured SOFC anode through impregnation. The SOFC anode can greatly improve the output performance of a single cell as compared with the performances of cells prepared by adopting single pore-forming agents, and can be applied in the field of SOFC anode preparation.

A pipe composite comprises modified bamboo fiber and epoxy resin. The modified bamboo fiber accounts for 5-20% of the weight of the composite. The preparation method of the modified bamboo fiber includes the following steps that 1, bamboo fiber is pretreated in subcritical water; 2, the pretreated bamboo fiber obtained in step 1 reacts with alkali liquor and a surfactant; 3, the reaction product reacts with alkylene oxide; 4, the reaction product is evenly mixed with a meta-aluminate aqueous solution, dipping is performed, the pH is regulated to be a neutral value, stirring is performed for aging, and filtering and drying are performed. The method is simple in process, environmentally friendly and safe; a composite pipe prepared by the method has high strength and high toughness and is widely applied to the fields of chemical production, agricultural production and the like.

The invention relates to a pearl coloration method with the combination of nano-carbon and a reactive dye. The pearl coloration method is characterized in that scoured and bleached pearls are dyed into black color in dye solution containing the nano-carbon with a concentration of between 1.5 and 2.5g / L and beta-sulfuric acid ester vinyl sulfone with a concentration of between 2 and 3.5g / L under the vacuum degree (absolute pressure) of between 10 and 30kPa, the granularity of the nano-carbon and the beta-sulfuric acid ester vinyl sulfone is between 10 and 100nm, and then glittering, translucent, beautiful and bright black pearls are obtained through steps such as color fixation, soap boiling, dehydration and so on. The dyeing rate of the pearls obtained by the technology is more than 95 percent, and the steady color fixation rate of the coloration within 2 years is more than 85 percent. The pearl coloration method has simple operation and easy process control, and the dyed pearls have reliable quality and are safe to human bodies.

The invention provides an aspirating oral-protective toothbrush for a patient with tracheal intubation. The toothbrush comprises a brush rod, a brush handle, a brush head and a brush back, wherein an aspirating pipeline and a water injection pipeline are arranged in the brush rod and the brush handle; a through hole is formed in the top end of the brush rod; the brush head is arranged on one side of the top end of the brush rod, and the brush back is correspondingly arranged on the other side of the brush rod; an aspirating pipe connector is arranged at the tail end of the brush handle; a pressure control switch is arranged on the aspirating pipeline of the brush handle; a water injection pipe connector is arranged in the side wall of the brush handle; at least one brush tooth is arranged on the brush head; a water spray conduit and a waste aspirating conduit are arranged in the brush head; at least one orifice is formed in one side of the brush tooth, and at least one waste aspirating opening is formed in the other side of the brush tooth. The aspirating oral-protective toothbrush for the patient with tracheal intubation has a simple structure and smart design, is convenient to use, and is worthy of popularization and application in practical work.

The invention discloses a multilayer composite membrane and a preparation method therefor and belongs to the technical field of food packaging materials. The preparation method comprises the steps: firstly, dissolving and dispersing polylactic acid into tetrahydrofuran, then, adding graphene oxide, silicate, titanate, anhydrous ethanol and fatty acid, carrying out a heated refluxing reaction, andcarrying out flow casting film forming, so as to obtain a dry film; drawing the dry film, and then, carrying out alkali liquor soaking and drying, so as to obtain a basal membrane; and then, paintingthe surface of the basal membrane with a coating solution with polyethylene glycol phosphate, carboxymethyl chitosan and terephthalaldehyde, carrying out drying after painting is completed, then, carrying out secondary painting, carrying out repeated painting by 5 to 10 layers in such a manner, carrying out vacuum drying until the weight is constant after the painting of last layer is completed soas to form a composite layer on the surface of the basal membrane, and then, carrying out hot-pressing and discharging, thereby obtaining the multilayer composite membrane. The multilayer composite membrane disclosed by the invention can still maintain good mechanical properties after repeated folding and the like, and naked eyes cannot observe layering and cracking.

The invention discloses a measurement method and system for students' classroom oral practice. The measurement method includes: respectively counting the cumulative value of the number of correct answers to oral practice and the cumulative value of the number of wrong answers in oral practice for each student in each measurement link in the classroom through a student terminal and the cumulative value of the times of distracted listening in oral practice; then they are combined and counted separately to obtain the correct percentage of oral practice, the percentage of wrong answers in oral practice and the percentage of distracted oral practice; the percentage of correct oral practice, oral practice The percentage of wrong answer rate and the percentage of distracted attention in oral practice are sent to the teacher's terminal, and the statistics of students' oral practice correct rate, oral practice answer rate and oral practice distraction can be checked through the teacher's terminal. The invention realizes comprehensive, systematic, intelligent and feasible quantification and measurement of correct rate of oral practice in class, wrong answer rate of students and distracted listening in class.

The invention discloses a method and a system for realizing a teacher teaching reflex function in the technical field of teaching. The method for realizing the teacher teaching reflex function comprises the following steps: acquiring a current teaching index statistical value in real time through a teacher terminal; comparing the obtained current teaching index statistical value with a corresponding historical teaching index statistical value, and comparing whether a comparison result is greater than an index early warning preset value, and if so, judging that the teaching index is in an abnormal state; when the teaching indicator is abnormal, enabling the teacher terminal to output abnormal teaching index information for prompting a teacher to refresh, and outputting a reflection information editing input window for teachers to perform teaching reflection on the abnormal teaching indexes. According to the invention, a big data statistical analysis and key teaching index early warningmethod is utilized to realize comprehensive, systematic, intelligent and feasible quantification and measurement of classroom teaching indexes, thereby facilitating deep and popularization of effective teaching process practice by teaching reflection.

The invention relates to a novel anti-condensation steamer case for steamer cooking or electric steamer cooking. The novel anti-condensation steamer case consists of a steamer case rack and a steamer case tray, wherein the steamer case tray is provided with a condensation water flow guide groove 3; the flow guide groove 3 is arranged in the way that the depth of the groove is gradually increased from one end to the other end; and water drop holes 4 are formed on the deepest part of the flow guide groove 3. Thus, water condensed on the front face of the steamer case is guided to flow to the water drop holes 4 at the edge of the steamer case tray along the groove to drop; meanwhile, since the depth of the flow guide groove is gradually increased from one end to the other end, the water condensed on the reverse face of the steamer case tray also smoothly flows to the edge of the steamer case tray along a convex part on the reverse face of the flow guide groove to drop; and thus, most of the condensation water formed on the front face and the reverse face of the steamer case tray can be prevented from dripping into foods in the steamer case on the lower layer, and the foods in the steamer case on the lower layer can be prevented from flavor reversion and deformation due to contact with more condensation water, and the tainting by odor is reduced.

The invention discloses a quick qualitative and quantitative method for oligosaccharide in breast milk. The quick qualitative and quantitative method mainly includes steps of 1, pretreating samples, to be more specific, removing fat and proteins from 150-250 micro-l of breast milk to obtain ultimate supernatant, adding ultra-pure water into the supernatant and diluting the supernatant to obtain the loaded samples; 2, establishing standard curves for standard substances by the aid of ultrahigh-performance liquid chromatography and mass spectrometry; 3, separating different components of the oligosaccharide in the breast milk in the loaded samples by the aid of ultrahigh-performance liquid mass spectrometry and carrying out quantitative analysis by the aid of mass spectrometry combined with the standard curves so as to obtain the content of the oligosaccharide in the breast milk. The ultrahigh-performance liquid chromatography is implemented by the aid of amino chromatographic columns with the sizes of 2.1*100 mm and 1.7 micrometers, 8-10 mmol / L of ammonium formate solution (A) and acetonitrile (B), and the ammonium formate solution (A) and the acetonitrile (B) are used as mobile phases; gradient elution programs are carried out by the aid of 95%-75% of B for 0-10 min or are carried out by the aid of 75% of B for 10-15 min or are carried out by the aid of 75%-65% of B for 15-20 min or are carried out by the aid of 65%-10% of B for 20-21 min or are carried out by the aid of 10% of B for 21-24 min or are carried out by the aid of 10%-95% of B for 24-25 min or are carried out by the aid of 95% of B for 25-35 min; the flow rates are 0.3 mL / min, and the column temperatures are 40-60 DEG C. The quick qualitative and quantitative method has the advantage that 12 types of oligosaccharide in the breast milk can be quickly detected by the aid of the quick qualitative and quantitative method and can be quantified by the aid of the quick qualitative and quantitative method.

The invention discloses production equipment for a copper wire. The production equipment comprises a drawing machine, wherein a processing box is further arranged on one side of the drawing machine; acooling furnace is arranged in the processing box; the cooling furnace is fixed on the left side of the interior of the processing box through a supporting column; the upper end of the cooling furnace is connected with a gas delivering pipe; the gas delivering pipe penetrates through the top of the processing box and is connected with an air blower; a water cooling box is arranged at the lower end of the right side of the interior of the processing box; a gas suction pipeline mechanism is arranged at the upper end of the right side of the interior of the processing box; a winding mechanism isfixedly arranged on one side of the processing box; and the winding mechanism comprises a rack and a wire arranging mechanism. According to the production equipment, by arrangement of the wire arranging mechanism, the copper wire can be arranged and wound, and the obtained copper wire coil is compact and attractive.

The invention discloses a sugarcane ridging machine which comprises a machine frame, a transmission shaft, a drive gear, a square beam, a tension frame, a driven gear shaft, a driven gear, chains, tillage knives and a hydraulic rod, wherein the transmission shaft is fixed on the machine frame; the drive gear is arranged on the transmission shaft; the square beam is hinged to the transmission shaft; the tension frame is connected with the square beam; the driven gear shaft and the driven gear are arranged on the tension frame; the chains are connected with the driven gear and the drive gear; the tillage knives are mounted on the chains; the two ends of the hydraulic rod are respectively hinged to the square beam and the machine frame. The quantity of the chains is 5-6, knife edges of the tillage knifes on the two chains on the two sides face the inner side of the ridging machine, knife edges of the tillage knifes on the other chains are back on to the chains, the tillage knifes on the two adjacent chains are mutually staggered, and the tillage widths of the tillage knifes on the two adjacent chains are overlapped. The square beam can buffer and reduce reverse impact force generated to machines and tools when the tillage knives collide with hard objects in a field so as to protect a transmission device for the machines and the tools. The arrangement of the tillage knives can play a role in ridging.

The invention belongs to the field of preparation of CSM (chlorosulfonated polyethylene), and particularly relates to a method for preparing oil-extended CSM through a gas-solid reaction. The method comprises steps as follows: high-Mooney-viscosity CPE (chlorinated polyethylene) powder and an anti-bonding agent are added to a reactor, stirring is started, the inside of the reactor is vacuumized, the reactor is filled with hot nitrogen and then decompressed, the process is repeated for multiple times, an ultraviolet lamp is turned on for irradiation, chlorine and sulfur dioxide mixed gas is fed into the reactor, a reaction product is transferred to purified water to be washed repeatedly until the pH of the washing water is higher than 6 after the reaction, then a material is dehydrated and dried, high-Mooney-viscosity CSM powder is obtained, the high-Mooney-viscosity CSM powder and rubber processing oil are put into a high-speed stirrer in proportion, a stabilizer is heated, mixing and forming are performed by the aid of conventional rubber mixing and forming equipment, and the oil-extended CSM product is obtained. With the adoption of the method, problems that a main raw material, namely, low-Mooney-viscosity CPE, is difficult to produce, the CSM product is not high in tensile strength, the production cost is high and the like in the process for producing the CSM with an existing gas-solid method can be solved.

The invention relates to a composite liposome of bamboo leaf flavonoids, a preparation method and an application thereof. The bamboo leaf flavone composite liposome of the present invention contains the following components in weight ratio, bamboo leaf flavone: compound agent: membrane material: proppant: antioxidant: solubilizer=0.1-2: 0.1-2: 0.2 ‑5: 0.02‑0.5: 0.01‑0.1: 0.1‑2. The invention protects the stability and integrity of its functional components by effectively coating the bamboo leaf flavonoids. In the wrapping process, hyaluronic acid with excellent moisturizing effect is compounded to prepare bamboo leaf flavonoid complex liposome, which improves its system compatibility in the development of skin care products. At the same time, the unique carrying performance and slow-release ability of liposomes can promote the absorption and long-term care of bamboo leaf flavonoid complex liposomes in the skin, and improve the expression of skin moisturizing, sun protection, whitening and anti-aging effects.

The invention discloses a method for tanning sheepskin with an organic amine synergistic epoxy resin composition tanning agent. The softened or acid-removed sheepskin is first treated with an organic amine bath, and then an epoxy resin combination is added. tanning agent. Because the present invention allows the organic amine to penetrate into the leather fiber first, it can cooperate with the epoxy resin tanning agent to react with the amine group of the organic amine and the amine group on the skin collagen fiber at the same time to form a network crosslinked structure, thereby not only improving the leather's durability. Moisture and heat stability, also enable epoxy resin to be used as the main tanning agent to tan sheepskin, improve its tanning performance, and make the tanned sheepskin grain clear, full leather body, white color, excellent yellowing resistance , The storage period of the tanned leather at room temperature is more than 6 months.

The invention discloses an application of a star type polycation based compound as bactericide. A high performance star type poly-quaternary ammonium salt bactericide is synthesized. The bactericide can effectively inhibit hydration, swelling, dispersion and migration of clay even if the using amount of the bactericide is very low. The molecules of the cation bactericide comprise 18 quaternary ammonium salt groups, thus the bactericide can act on the clay particles with negative charges through multiple sites, the adsorption degree is high, the using amount is low, and the swelling inhibitingperformance is excellent. The cation bactericide can be widely used to process oil containing sewage in an oil field.

The invention provides a disc-shaped unscrewing mechanism, which comprises a rotary fixed shaft assembly, an unscrewing mechanism and a blade mechanism. In the initial state, the blade mechanisms areall contracted to be a straight line type, thereby being beneficial to reducing the volume; in the unfolded state, a first step gear and a second step gear are driven to rotate through the rotation ofa straight bevel gear, the first step gear and the second step gear are respectively meshed with circular gears in a first sheet gear set and a second sheet gear set in sequence in the rotating process, so that the unfolding blades fixedly arranged on the circular gears are unfolded in sequence. In addition, the invention also provides a partial discharge detection device containing the disc-shaped unscrewing mechanism.

The invention belongs to the field of high polymer material preparation. Specifically, the invention relates to a chlorinated methyl methacrylate-butadiene-styrene copolymer (CMBS) and a preparation method thereof through gas-solid phase reactions. The preparation method comprises the following steps: adding polymethyl methacrylate-butadiene-styrene (MBS) powder and an anti-bonding agent into a rotary reactor or a tank reactor with a stirring function, wherein the dosage of the anti-bonding agent is 0-6% of the mass of the MBS powder; starting a rotary drum of the rotary reactor or stirring function of the tank reactor, vacuumizing, then adding an initiator, introducing chlorine into the reactor, controlling the mixed gas introducing speed, carrying out reactions, and controlling the reaction temperature to be less than or equal to 80 DEG C in the whole process; repeating the chlorination process for multiple times, washing the reaction product until the pH value is larger than 6, thenperforming suction filtration, and drying to CMBS powder. The chlorine content of CMBS is 8%-30%. The prepared CMBS can be used as a weather-resistant transparent impact modifier for polyvinyl chloride, engineering plastic and special synthetic rubber.