6881results about "Chemical industry" patented technology

The invention relates to the field of electric heating materials, and provides a graphene-based heating coating and a preparation method thereof. The coating is prepared from functionalized graphene, a surface modified bismuth telluride nanobelt, polyaniline, bisphenol A epoxy acrylate, polyurethane acrylate, a dispersing agent, a flatting agent, a silane coupling agent, a defoaming agent and a propylene glycol methyl ether acetate / N-methyl pyrrolidone mixed solvent. The functionalized graphene is obtained by modifying a hyperbranched polyolefin-acryloyl-POSS copolymer, and carrying out ultrasonic stripping, centrifugal separation, gradient washing and vacuum drying; the surface-modified bismuth telluride nanobelt is modified by an amino silane coupling agent, so that the interfacial compatibility is improved. The preparation method comprises the steps of solvent premixing, nanofiller dispersion, ultrasonic homogenization, coupling agent modification, ultraviolet curing and thermocuring. The heating coating provided by the invention has high conductivity, excellent thermal stability and adhesive force, and can be widely applied to heating electric appliances and intelligent temperature control equipment.

The invention relates to a preparation method of spherical silicon dioxide micropowder with ultralow dielectric loss. The preparation method comprises the following steps: preparing an organic silicon polymer; preparing slurry; performing solid-liquid separation on the synthetic slurry to obtain concentrated slurry, and drying the concentrated slurry to obtain spherical silica powder; carrying out low-temperature heat treatment on the obtained spherical silica powder at 1500-7000 DEG C for h to remove residual organic matters and free water in the powder; then, high-temperature densification is carried out at the temperature of 3000-28000 DEG C for h, and moisture is further removed; adding a modifier into the stirring equipment for surface modification; and after surface modification, drying at 55-300 DEG C for h, and removing modified micromolecular byproducts to obtain the spherical silicon dioxide micro powder with ultralow dielectric loss. The method is simple in production process, short in production period, low in production cost, high in yield and capable of effectively reducing the dielectric loss of the spherical silicon dioxide micro powder.

The invention relates to a deicing super-hydrophobic coating based on MXene, a coating, a preparation method and application of the coating. The coating comprises the following components in percentage by mass: 2%-5% of a super-hydrophobic modified MXene photo-thermal material, 2%-5% of epoxy resin, 0.5%-1.5% of an epoxy resin curing agent, 0.5%-1.5% of PDMS, 0.05%-0.15% of a PDMS curing agent and 80%-90% of a diluent. Wherein the super-hydrophobic modified MXene photo-thermal material is MXene powder treated by fluorine-free long-chain silane, and the super-hydrophobic modified MXene photo-thermal material is a super-hydrophobic modified MXene photo-thermal material. MXene with excellent photo-thermal conversion performance is used as a photo-thermal material, fluorine-free long-chain silane is used for performing low-surface-energy hydrophobic modification on the MXene material, environmental pollution caused by perfluorinated or polyfluorinated organic compounds is avoided, photo-thermal performance and super-hydrophobic performance are integrated, the advantages of a super-hydrophobic coating and a photo-thermal coating are integrated, and the application prospect is wide. The deicing super-hydrophobic coating based on MXene can be used for passive ice prevention and active photo-thermal deicing.

The invention relates to a preparation method of a radiation refrigeration coating with super-hydrophobic performance. According to the method, hydrophobic modified nano-particles and nano-particles with high reflectivity and high emissivity are blended in an adhesive solution, an adhesive is separated out to form a micron-sized aggregate through a non-solvent induced phase separation technology, and meanwhile, various nano-particles are uniformly coated on the surface of the aggregate, so that a stable suspension system is prepared. The radiation refrigeration coating has excellent radiation refrigeration performance, excellent super-hydrophobicity and good durability, the preparation process is simple, the radiation refrigeration coating is suitable for large-scale industrial application of outdoor scenes such as building outer walls, and a new technical solution is provided for developing efficient and lasting radiation refrigeration materials.

The invention discloses a preparation method of a high-dispersion and high-thermal-conductivity filler based on carbon black, and relates to the technical field of carbon black modification, and the preparation method specifically comprises the following steps: treating carbon black in a first acid solution to obtain activated carbon black; treating the single-walled carbon nanotube in a second acid solution to obtain an activated single-walled carbon nanotube; treating the activated single-walled carbon nanotube with a sulfanilamide solution to obtain a functionalized single-walled carbon nanotube; placing the graphene nanosheets in a third acid solution for treatment to obtain activated graphene nanosheets; the preparation method comprises the following steps: mixing amino silane hydrolysate and epoxy silane hydrolysate, adding activated carbon black, functionalized single-walled carbon nanotubes and activated graphene nanosheets, and treating to obtain a pre-modified filler; amino acid and a cross-linking agent are pre-polymerized to obtain an amino acid pre-polymerized solution, and the pre-modified filler is treated by the amino acid pre-polymerized solution to obtain the high-dispersion and high-thermal-conductivity filler. The method disclosed by the invention is simple to operate and low in energy consumption, the prepared filler is good in thermal conductivity and good in dispersity in a polymer matrix, and the thermal conductivity and the mechanical property of a polymer are greatly improved.

The present invention provides a silane cross-linked polyethylene insulating material for heating cables and a preparation method thereof, wherein the insulating material is prepared by mixing the following raw materials in parts by weight: 70-100 parts of polyolefin resin; 1.5-2.5 parts of silane cross-linking agent; 0.3-0.6 parts of grafting initiator; 0.2-0.6 parts of first lubricant; 0.1-0.3 parts of first antioxidant; 1.0-2.5 parts of cross-linking catalyst; 0.2-0.5 parts of second lubricant; 0.1-0.3 parts of second antioxidant; 5-15 parts of ethylene-vinyl acetate copolymer; 0.5-2 parts of maleic anhydride grafted polyethylene; 0.1-0.3 parts of ultraviolet absorber; 0.1-0.3 parts of antistatic agent. The preparation method includes mixing, melt blending, extrusion granulation, cross-linking molding and cooling and shaping. The finished product of the present invention has better performance, more stable production and more competitive cost.

The invention provides a continuous purification method of crude acetonitrile, and belongs to the field of acetonitrile purification. The continuous purification method of the crude acetonitrile comprises the following steps: rectification light component removal, membrane separation impurity removal, adsorption impurity removal and rectification purification. According to the continuous purification method of the crude acetonitrile, continuous purification of the crude acetonitrile can be realized, and meanwhile, the problems that new impurities are introduced by side reactions, the rectification efficiency and the rectification stability are influenced by treated products and the device is influenced by over-high alkalinity of the treated secondary rectification liquid due to the fact that sodium hydroxide and formaldehyde are adopted to treat the rectification liquid are avoided; the acetonitrile product with the purity meeting the requirement is prepared by continuously purifying the crude acetonitrile.

The utility model provides an emission reduction system for producing tetrahydrofuran from 1, 4-butanediol, and relates to the technical field of chemical production equipment. By arranging the 1, 4-butanediol raffinate separation unit, the 1, 4-butanediol raffinate generated in the tetrahydrofuran production unit can directly enter the film evaporator to be separated, the light component 1, 4-butanediol is rapidly evaporated and flows out from the first gas phase outlet, and the light component 1, 4-butanediol is condensed by the gas phase condenser and then returns to the tetrahydrofuran production unit to serve as a raw material to be recycled. And heavy components of tar in the film evaporator flow out from a first liquid phase outlet at the bottom and are discharged and incinerated. The system can further separate the 1, 4-butanediol raffinate generated in the tetrahydrofuran production unit, and recycle the 1, 4-butanediol in the raffinate, so that the material waste of the 1, 4-butanediol is reduced, and the utilization rate of the 1, 4-butanediol raw material is improved. And meanwhile, the 1, 4-butanediol residual liquid discharge incineration treatment amount is greatly reduced, energy conservation and emission reduction are achieved, and the production cost is reduced.

The invention belongs to the technical field of chemical production, and particularly relates to an efficient energy-saving refining system for producing cyclohexanone through dehydrogenation, which comprises an alcohol tower, a dehydrogenation heat exchanger, a dehydrogenation reactor, an alcohol tower feeding heat exchanger, a dehydrating tower, a light tower I, a light tower II, a ketone tower and an alcohol recovery tower which are connected in sequence, a middle feeding port of the alcohol tower is communicated with a tube pass discharging port of the alcohol tower feeding heat exchanger, a top discharging port of the alcohol tower is communicated with a tube pass feeding port of the dehydrogenation heat exchanger, a bottom discharging port of the alcohol tower is communicated with a middle feeding port of the alcohol recovery tower, and an alcohol ketone drying tower is additionally arranged between the alcohol tower feeding heat exchanger and the dehydration tower. A feed port of the alcohol ketone drying tower is communicated with a shell pass discharge port of the alcohol tower feed heat exchanger, and a liquid phase discharge port of the alcohol ketone drying tower is communicated with an upper feed port of the dehydrating tower. The alcohol tower adopts a process that raw materials directly enter the tower top, tower top reflux is cancelled, steam consumption is reduced, and the purpose of saving energy is achieved.

The invention provides a graphene-boron nitride composite epoxy resin material and a preparation method thereof, the surface of a graphene-boron nitride filler is modified to obtain a filler with magnetic response, the filler is added into epoxy resin, and the filler can be in more sufficient contact and ordered arrangement under the action of an external magnetic field, so that the graphene-boron nitride composite epoxy resin material is obtained. The heat conductivity coefficient of the composite material is effectively improved. Tests show that when the filler accounts for 25%, the heat conductivity coefficient reaches 2.1 (W / mk), and the friction coefficient can be effectively reduced and is reduced by about 30% compared with pure epoxy resin. The research of the invention provides a new thought and method for preparing the epoxy resin-based composite material with high heat-conducting property, expands a new field and direction for the application of epoxy resin in the field of electronic packaging, and has practical significance.

The invention discloses a chemical heat exchanger with energy-saving improved structural design, which comprises a heat exchange tank body, a connecting disc is fixedly mounted at the end part of the heat exchange tank body, a tank cover is arranged on one side, far away from the heat exchange tank body, of the connecting disc, and a processing assembly is arranged on the inner side of the tank cover. When the heat exchanger is used, dirt generated by liquid can adhere to the interior of the heat exchange tank body and needs to be cleaned, at the moment, a waterproof motor is started, a rotating rod fixedly installed at the output end of the waterproof motor starts to rotate, and a limiting ring fixedly installed at the end of the rotating rod drives a reciprocating lead screw to rotate along with the reciprocating lead screw; the rotating reciprocating lead screw drives the sleeve plate arranged on the outer wall of the reciprocating lead screw in a sleeving mode to move in a reciprocating mode, the sleeve plate drives the scraping ring to slide on the outer wall of the heat exchange pipe through the extrusion rod, and due to the fact that the scraping ring is attached to the outer wall of the heat exchange pipe to slide, dirt attached to the outer wall of the heat exchange pipe can be cleaned.

The invention discloses preparation of a high-uniformity cerium oxide abrasive material and application of the high-uniformity cerium oxide abrasive material in a chemical mechanical polishing solution. According to a method, cerium nitrate or cerium oxalate is used as a cerium source, a cationic or nonionic surfactant is used as a structure-directing agent, and the high-uniformity cerium oxide abrasive material is prepared in a mixed solvent system formed by water and isopropanol or water and diethylene glycol according to a specific volume ratio. The preparation method comprises the following steps: regulating the particle size and the morphology structure through a solvothermal reaction, carrying out cleaning, drying and high-temperature calcination treatment on a reaction product to obtain sphere-like cerium oxide nano-particles with high particle size concentration ratio, moderate surface roughness and good dispersity, adding cerium oxide powder into deionized water, and carrying out ultrasonic dispersion to obtain the spherical cerium oxide nano-particles. And sequentially adding a dispersing agent and amino acid while stirring, uniformly stirring, fixing the volume, and adding a pH regulator to enable the solution to be weakly acidic, thereby obtaining the chemical mechanical polishing solution. The cerium oxide submicron powder which is different in surface appearance, particle size and distribution uniformity is prepared by adjusting the solvent ratio and other reaction conditions.

The invention discloses a single-phase refrigerant medium and a preparation method thereof.The preparation method comprises the following preparation steps that S1, in an inert gas atmosphere, a dimethyl cyclosiloxane mixed ring body and 1, 1, 3, 3-tetramethyldisiloxane react under the action of a second catalyst, and after impurities are removed, a hydrogen-terminated polysiloxane intermediate is obtained; s2, in an inert gas atmosphere, adding the end hydrogen-containing polysiloxane intermediate and a first catalyst into a solvent, then adding isolated diene for reaction, adding alpha-olefin after the reaction is performed for a period of time, and performing low-temperature removal to obtain the single-phase refrigerant medium. The single-phase refrigerant medium has the advantages of being good in fluidity, resistant to high and low temperature, good in insulativity, good in thermal conductivity, high in safe usability and the like, does not contain fluorocarbon compounds, is environmentally friendly, is simple in preparation method and is suitable for industrial production.

The invention provides a polyimide-based dielectric heat-conducting composite material and a preparation method thereof.The preparation method comprises the steps that a hexagonal boron nitride nanosheet is modified through polydopamine to obtain a modified boron nitride nanosheet (MBN), and the modified boron nitride nanosheet (MBN) is mixed with a polyamide acid (PAA) solution to obtain an MBN / PAA solution; mBN is directionally distributed in PAA nanofibers through an electrostatic spinning technology, meanwhile, dispersion liquid of silver wires is electrostatically sprayed, and the silver wires serve as a bridge, so that a heat conduction path is constructed under the condition that less filler is doped; finally, the MBN-AgNW / PI dielectric heat-conducting composite material is prepared through a staggered stacking-compression molding-thermal imidization technology, and the prepared composite material is good in heat conductivity, low in dielectricity and high in insulativity and has huge application potential in electronic packaging equipment.

The present application provides an entropy-regulated composite dielectric film, which comprises a polymer matrix; and fillers dispersed in the polymer matrix, wherein the fillers comprise Bi 4‑a M 1a Ti (3‑3b) M 2b O 12 , wherein M1 comprises at least one of lanthanum, neodymium, samarium and praseodymium, M2 comprises at least one of zirconium, hafnium and tin, 0 The entropy-regulated composite dielectric film has high temperature resistance, high breakdown strength, high polarization strength, high energy storage density and good stability.

The utility model relates to the field of resistance furnaces, and discloses a multi-tube resistance furnace for the production of carbon nanotube films, including a resistance furnace, an upper cover is installed at the top of the resistance furnace, a rotating assembly is installed at the top of the upper cover, a fixing assembly is plugged into the top of the resistance furnace, a heating tube is installed on the inner wall of the fixing assembly, a limiting assembly is installed at the left end of the resistance furnace, the fixing assembly includes a sleeve, a positioning ring is provided on the outer wall of the sleeve, a positioning groove is provided at the bottom end of the upper cover, the positioning ring and the positioning groove are matched, a positioning groove is also provided at the top of the resistance furnace, and a fixing block is plugged into the inner wall of the sleeve. In the utility model, by setting a fixing assembly, multiple groups of heating tubes can be fixed at one time, and the rotating assembly can be used to drive the fixing assembly to rotate, so as to ensure that the materials inside the multiple groups of heating tubes can be evenly heated. Since multiple groups of materials can be heated at one time, the heating efficiency is high when in use.

The invention relates to the technical field of abalone peptide production, and discloses extraction equipment for extracting natural taurine from sea cucumbers, which solves the problems of function splitting, pollution transfer and low efficiency in the traditional process by integrating three functional modules of countercurrent stirring, in-situ filtration and rotary elution. A reverse stirring part forms shear convection through stirring blades rotating in two directions and a stirring plate, and sea cucumber tissue breaking is accelerated; a dynamic adjusting and filtering mechanism is adopted in the filtering part, filtering modes are switched after stirring, and in-situ separation of the extracting solution and the raw materials is achieved; the elution part drives the cationic resin to be in forced contact with an extracting solution through rotation, and the adsorption efficiency is improved by combining through-channel type resin distribution. The three components cooperatively operate in a single tank, and traditional crushing, extracting, separating and eluting multi-step processes are integrated into a continuous flow. The method has the advantages that the extraction efficiency is improved, the taurine purity is improved, and meanwhile, the material transfer loss and the pollution risk are reduced.

The invention belongs to the field of synthesis of inorganic non-metallic materials, and particularly relates to an equimolar-ratio seven-element high-entropy oxide and a preparation process thereof. The preparation process comprises the following steps: putting seven oxide powder Al2O3, Y2O3, TiO2, ZrO2, NiO, CuO and CeO2 into a ball milling tank according to a molar ratio of 1: 1: 2: 2: 2: 2: 2: 2, adding absolute ethyl alcohol and zirconium oxide grinding balls, performing ball milling in a ball mill, and fully drying and sieving after ball milling to obtain mixed powder; carrying out tabletting treatment on the mixed powder to obtain a to-be-sintered green body; and putting the to-be-sintered green body into an alumina crucible, and putting the alumina crucible into a microwave oven for microwave sintering. According to the method, the equimolar-ratio seven-element high-entropy oxide (AlYTiZrNiCuCe) Ox with good solid solution is obtained, the crystallinity and element uniformity of the seven-element high-entropy oxide are improved, all the raw materials react completely, meanwhile, the process efficiency is high, and energy consumption is low.

The invention relates to the technical field of graphene coatings, in particular to a graphene anti-corrosion heat dissipation coating and a preparation method thereof.The graphene anti-corrosion heat dissipation coating comprises a component A and a component B. The component A comprises, by weight, 50-70 parts of base resin, 10-20 parts of spherical silicon carbide, 5-20 parts of graphene slurry, 5-30 parts of anti-corrosion filler, 0-2 parts of dispersing agent, 0-2 parts of defoaming agent and 0-25 parts of diluent; comprising a component B curing chain extender. The invention has the following advantages: the curing agent composed of PPG, PCL, DETDA and MOCA is blended to generate a plurality of cross-linking reactions with matrix resin, so that the cured coating has excellent compactness, stability and mechanical properties; according to the present invention, the graphene slurry is subjected to gas phase synthesis, the graphene is uniformly dispersed, has characteristics of large sheet diameter and less layer number, and is well dispersed in the matrix resin to form the staggered and attached sheet-shaped barrier network, such that the invasion of the corrosion medium is blocked through the labyrinth effect, the coating compactness is enhanced, the corrosion resistance of the coating material is improved, the salt fog resistance of the coating material is up to 2000 h, and the resistance to 5% NaCl, 5% HSO5 and 5% NaOH is up to 90 days.

The invention relates to the technical field of collagen peptide extraction, and particularly discloses aquatic collagen tripeptide and a processing technology thereof, and the processing technology comprises the following steps: step S1, fish skin pretreatment; step S2, performing enzymolysis; step S3, fermentation; step S4, separation and purification; starting from three aspects, firstly, a modified degreasing agent is added in the degreasing treatment process, the modified degreasing agent takes 1-ethyl-3-methylimidazole acetate, zinc phytate and calcium citrate as main components according to a specific mass ratio, and secondly, gel emulsion is added in the enzymolysis process, so that the modified degreasing agent is prepared. The gel emulsion has an oil gel structure, grape seed oil and sodium lignin sulfonate, and 3, a composite strain is added in the fermentation process, the composite strain is prepared by mixing bacillus natto and lactobacillus plantarum according to a specific proportion, and the purity and the extraction rate of the aquatic collagen tripeptide are improved through the synergistic effect of all the procedures.

The utility model discloses a heat exchanger tube bundle with adjustable baffle plate spacing, which comprises a tube plate, one side of the tube plate is provided with a plurality of heat exchange tubes, the plurality of heat exchange tubes are provided with baffle plates which are alternately distributed up and down at equal intervals, and the joints of the two sides of the baffle plates and the heat exchange tubes are provided with adjusting locking components. The baffle plate heat exchanger is provided with the threaded chucks, the locking nuts, the set screws and the screw holes, the distance between the baffle plates is adjusted by adjusting the locking assemblies, the distance between the baffle plates is convenient to adjust, and the heat exchange efficiency is improved by adjusting the distance between the baffle plates and increasing the flow speed.

This invention provides a jacketed multi-way plunger device and its application, belonging to the field of pipeline engineering design. The jacketed multi-way plunger device includes a first plunger valve and a second plunger valve; a first pipeline is vertically connected to the end of the first plunger valve, and a second pipeline is obliquely connected to the first plunger valve; a third pipeline is vertically connected to the end of the second plunger valve, and the first pipeline and the second plunger valve are obliquely connected. This invention integrates the first and second plunger valves into one unit through the pipeline arrangement, achieving both pipeline shut-off and flow functions, while simultaneously enabling continuous material feeding.

The present invention provides a system and a method for preparing a polyester polyol prepolymer. The system comprises an atmospheric pressure bubbling reaction rectifying tower and a reduced pressure heating reaction rectifying tower. The method comprises: introducing a protective gas into an atmospheric pressure bubbling reaction rectifying tower, introducing a raw material for preparing a polyester polyol prepolymer into the atmospheric pressure bubbling reaction rectifying tower, and carrying out a primary esterification reaction or an ester exchange reaction; and introducing the primary esterification product or the ester exchange product into a reduced pressure heating reaction rectifying tower, and carrying out one or more of a deep esterification reaction, an ester exchange reaction, and a pre-polycondensation reaction to obtain the polyester polyol prepolymer. The present invention has the advantages of high reaction efficiency, stable product quality, easiness in product separation, convenience in large-scale production and the like.

A preparation equipment and a process for a nylon salt solution. The preparation equipment includes a suspension preparation device, a first salt formation reactor and a second salt formation reactor. The suspension preparation device includes a feeding unit, a continuous feeding unit, a high-shear pump and a mixing reactor, the high-shear pump and the mixing reactor are cyclically connected with and in communication with each other through two connecting pipelines; the second salt formation reactor includes a second diamine feed pipe, a third diamine feed pipe, a circulation pipeline of the second salt formation reactor and an online near-infrared monitoring equipment located on the circulation pipeline of the second salt formation reactor.

The invention belongs to the technical field of organic synthesis of ethers, and particularly relates to a method for continuously synthesizing ethylene glycol dimethyl ether. The method comprises the following steps that ethylene glycol, sodium hydroxide and methane chloride serve as raw materials, multi-stage continuous reaction is carried out in liquid membrane reactors to synthesize ethylene glycol dimethyl ether, ethylene glycol, sodium hydroxide and methane chloride are introduced into the first-stage liquid membrane reactor, sodium hydroxide and methane chloride are introduced into the subsequent stages of liquid membrane reactors, and the first-stage liquid membrane reactor and the second-stage liquid membrane reactor are connected with the second-stage liquid membrane reactor. A byproduct sodium chloride is separated from a reaction product in the previous-stage liquid membrane reactor and then enters the next-stage liquid membrane reactor, a byproduct sodium chloride is separated from a reaction product in the last-stage liquid membrane reactor and then clear liquid is obtained, and ethylene glycol dimethyl ether is obtained through rectification treatment. The invention develops a novel process mode for continuously synthesizing an ethylene glycol dimethyl ether product, and provides a new idea for large-scale continuous production of ethylene glycol dimethyl ether.

The invention discloses a siraitia grosvenorii low-temperature continuous countercurrent extraction process and a siraitia grosvenorii extract, and belongs to the technical field of siraitia grosvenorii extraction.The siraitia grosvenorii low-temperature continuous countercurrent extraction process comprises the following steps that S1, fresh siraitia grosvenorii fruits are extracted through a four-stage squeezing and continuous countercurrent extraction combined method, s2, carrying out solid-liquid separation on the first liquid phase through ceramic membrane microfiltration, and collecting a microfiltrate; and S3, carrying out post-treatment on the micro-filtrate to obtain the extract. The siraitia grosvenorii low-temperature continuous countercurrent extraction process is high in extraction efficiency and low in solvent consumption, and the prepared extract has both high sweetness and oxidation resistance.

The invention discloses a device and a method for preparing silicon nitride powder with high sintering activity by a self-propagating method. The method comprises the following steps: mixing silicon powder and silicon nitride powder to obtain a mixed raw material; putting a porous plate into a crucible, scattering magnesium powder on the porous plate, and stacking the mixed raw material on the magnesium powder; sealing and vacuumizing the crucible, then filling nitrogen, repeating the operation for a plurality of times, and keeping the nitrogen atmosphere and pressure in the crucible; igniting the magnesium powder in the crucible, and starting a self-propagating combustion reaction; and cooling the crucible to obtain the silicon nitride powder with high sintering activity. The device comprises an ignition system, a self-propagating autoclave and a temperature detection module, one end of the ignition system and one end of the temperature detection module extend into the self-propagating high-pressure kettle. According to the method and the device, a continuous ventilation low-pressure self-propagating method is adopted, sufficient nitrogen is ensured to participate in the reaction, the raw materials are completely reacted, the yield and the purity of the product are ensured, the alpha-phase content of the product is relatively high, and the self-propagating device is simple in structure and convenient to operate.

The invention relates to the technical field of water bath shakers, in particular to a water bath shaker for extracting chondroitin sulfate from squids, which comprises a box body, and a motor is mounted on the outer wall of one side of the bottom end of the box body; the oscillation mechanism is arranged on the inner wall of the box body; the vibrating mechanism comprises a vibrating frame arranged in the box body, vibrating frames are fixedly connected to the outer walls of the two sides of the vibrating frame, supporting rods are fixedly connected to the outer walls of the bottom ends of the vibrating frames, eccentric wheels are fixedly connected to the outer walls of the bottom ends of the supporting rods, and mounting grooves are formed in the inner walls of the two sides of the bottom of the box body; a rotating rod is rotationally arranged on the inner wall of the mounting groove; in the oscillation process of the oscillation frame and the eccentric wheel, further oscillation treatment can be carried out, hot water distribution is more uniform through further oscillation, the oscillation extraction effect is optimized, clamping and limiting of the test tube are safer, the problems that the oscillation process is too single and the oscillation effect is poor are solved, and the oscillation extraction efficiency of the squid chondroitin sulfate is improved.

The invention discloses a high-heat-conductivity floor heating spiral pipe based on graphene, and belongs to the field of floor heating pipes. Comprising a pipe body, a plurality of protruding structures and groove structures are arranged on the outer wall of the pipe body, and the protruding structures and the groove structures are arranged alternately. According to the floor heating spiral pipe, a PERT material serves as a base pipe, and in the raw material preparation process of the base pipe, a graphene material is added according to a specific proportion. The graphene is uniformly dispersed in a PERT matrix through an advanced mixing process to form a stable composite material system, so that the PERT-based tube is endowed with excellent high heat-conducting property, and compared with a traditional PERT material, the heat conductivity coefficient of the PERT-based tube is remarkably improved. During construction, the spiral pipe is designed and laid according to a floor heating system, the spiral concave-convex outer wall of the spiral pipe is in contact with a cement filling layer, the occlusion degree with cement is increased through the concave-convex structure, and the compactness is improved.

The invention belongs to the technical field of energy-saving materials, and discloses a thermal insulation coating energy-saving material, which is prepared from the following raw materials in parts by weight: 90 to 120 parts of waterborne resin, 10 to 25 parts of modified nano cesium tungsten bronze material, 5 to 20 parts of modified nano silicon dioxide, 1 to 10 parts of light stabilizer, 0.1 to 1 part of coupling agent, 0.5 to 3 parts of flatting agent, 5 to 10 parts of wetting dispersant and 0.05 to 0.1 part of defoaming agent. According to the heat-preservation heat-insulation coating energy-saving material disclosed by the invention, the water-based resin is used as a main film-forming material, the modified nano cesium tungsten bronze and the modified nano silicon dioxide are used as nano functional materials, and the light stabilizer is used as an auxiliary material; by utilizing the excellent visible light transmittance and near-infrared light shielding performance of the modified nano-scale cesium tungsten bronze and the high transmittance and infrared barrier performance of the modified nano-silica, the glass can ensure that the visible light transmittance of the glass is 76% or above, meanwhile, 97% or above of infrared light and ultraviolet light are isolated, and the glass has excellent heat insulation and cooling effects.