96results about How to "Fully stripped" patented technology

The invention relates to a nucleating agent and a method for preparing the nucleating agent, wherein the nucleating agent is used for reducing the dimension of the foaming hole and improving the density of the foaming hole when a supercritical fluid foaming agent (such as carbon dioxide or nitrogen) is used for producing thermoplastic foaming products. The raw materials of the nucleating agent mainly consists of an organic montmorillonite, a thermoplastic resin and a supercritical fluid foaming agent; the specific weight of the nucleating agent master batches is controlled within 100+/-5% of that of the thermoplastic resin. The method has the advantages that a supercritical fluid foaming method is adopted to prepare the nucleating agent master batches which have approximate specific weights to the resin material adopted by the subsequent foam forming, thus facilitating the subsequent injection foam forming and extrusion foam forming; and the carbon dioxide or nitrogen in supercritical state is used for reducing the viscosity of the carrier resin during the mixing process, the dispersion uniformity of the peeled sandwich montmorillonite in the carrier resin is reinforced, the process temperature is reduced, the layer spacing of the sandwich nano-montmorillonite which may be not peeled is increased and the sufficient peeling is realized.

The invention relates to the technical field of performance enhancing and functionalization of carbon nanocomposite materials, in particular to a polymer thermal conductive film containing uniformly dispersed and highly oriented graphene and a preparation method thereof. The thermal conductive film material is composed of the following components: a polymer matrix, graphene, second thermal conductive filler, a surface treatment agent, a filler coating agent and a processing aid. A technical route combining "high shear melting dispersion" and "high stretching" is employed to promote the uniformdispersion of graphene nanosheets and other thermal conductive filler in the polymer matrix and the acquisition of high orientation, graphene itself is utilized to construct a long-range continuous and three-dimensional hybrid thermal conductive network structure, thus overcoming the anisotropy of graphene, and constructing a stable and effective thermal conductive network.

The invention discloses a polyamide/graphite composite material with high conduction performance and a preparation method thereof. The composite material consists of a polyamide substrate and nanometer graphite and is prepared through in-situ polymerization. The nanometer graphite has high diameter-to-thickness ratio; and an effective conduction network can be formed in a polymer by using little nanometer graphite. With the low content of a conduction filling of the nanometer graphite, a conduction polymer material keeps original good mechanical performance. The volume conductivity of the polyamide/graphite composite material with high conduction performance can reach 8*10S/cm; and compared with a conventional natural graphite and expanded graphite conductive composite material, the polyamide/graphite composite material has excellent properties of low filling amount and high conductivity.

The invention discloses a mudstone environmental protection regeneration system. The mudstone environmental protection regeneration system comprises a feeding mechanism; the feeding mechanism comprises a stock bin, a vibrating feeding machine, a crushing mechanism which comprises a jaw type rough crushing machine and a hammer type fine crushing machine, a sand and gravel separating mechanism, a gravel fine separating mechanism and a mud and sand water passing mechanism; the sand and gravel separating mechanism comprises a rough separating vibrating screen; the rough separating vibrating screen comprises a gravel layer and a mud and sand layer; the gravel fine separating mechanism comprises a fine separating vibrating screen; the fine separating vibrating screen comprises a multi-layer finished product layer and a fine sand layer; the mud and sand water passing mechanism comprises a spiral conveyer; other devices except the spiral conveyer is provided with a spraying water pipe respectively. The mudstone environmental protection regeneration system can crush and clean gravel residues containing soil to enable the gravel residues to be recycled and has huge economic benefits and a remarkable environmental friendly effect.

The invention discloses a production method of a super-toughness engineering plastic of nylon 6/ polycarbonate/ elastomer/ HDI, comprising the following steps: 1) 100 parts by mass of nylon 6 (PA6), 5-15 parts by mass of polycarbonate (PC) and 5-15 parts by mass of maleic anhydride graft ethylene-octene copolymer elastomer (POE-g-MAH) are added, 100 parts by mass of PA6, 5-15 parts by mass of PC and 0-5 parts by mass of organ-montmorillonite (OMMT) are added and 0-1.36 wt% of HDI is respectively added to be evenly mixed at a ratio; and 2) the mixture is fused and extruded by a screw extruder for granulation at the extruding temperature of 230-260 DEG C, the rotating speed of the screw is 50-80 r/min, and the cooling mode of extrudate is characterized in water cooling. Compared with the prior art, the invention obtains super-toughness nylon 6 engineering plastic with high modulus.

The invention discloses a preparation method of a graphene sheet. The graphene sheet is prepared from graphite and alkali metal through electrochemical reduction exfoliation of the graphite in a short-circuit-resembling environment under the condition of a nonaqueous electrolyte as an intercalation agent. The preparation method has the benefits as follows: oxidizing raw materials such as strong acid and the like are not used, the graphite is mixed with the alkali metal directly in the electrolyte and exfoliated in an short-circuit-resembling electrochemical environment, the operation is simple, an exfoliation product is in the electrochemical environment all along, and the graphene sheet material with sufficient exfoliation is obtained more easily; further, the method is amplified easily for macroscopic preparation, and the prepared graphene sheet have complete structure, fewer defects, good homogeneity and good electrical conductivity.

The invention discloses a method for separating corn stalk bark and corn pith, which comprises the steps of: (1) crushing corn stalks, (2) separating crushed stalk barks from other light parts; (3) separating light parts of corns from air flow and dusts. The invention further discloses a device for realizing the method for separating corn stalk bark and corn pith, which comprises a crusher, a high-speed oscillating sieve, a cyclone separator and a centrifugal fan, and all the parts are connected by pipes. The device is mainly used for separating corn stalks without leaves and corn pith, or directly dividing the whole corn stalks into two parts, i.e. stalk barks and a mixture of stalk leaves and corn pith. Because the stalk barks, leaves and pith of the corns are different in components, the separation of all the parts is helpful for high-efficiency utilization, and lays a foundation for commercialized high-efficiency utilization of stalks of corns and the like.

The invention relates to the technical field of functionalization and high performance of plastic pipes, in particular to a graphene modified oxygen-resistant polyethylene master batch and a preparation method and application thereof. The modified plastic master batch is composed of the following components: a polyethylene matrix, graphene, a second oxygen inhibitor, a coating agent, a surface treating agent, a dispersing agent and an antioxidant. According to the three-step production process, the mixing, dispersing and stripping effects of graphene in a polyethylene matrix are improved, thefilling proportion of graphene in the composite material is increased through organic combination of a new material, a new technology and a new method, and formation of a perfect network structure inthe composite material matrix is promoted. The oxygen barrier property of the composite material can be remarkably improved through good construction of a network, so that the application potential ofgraphene in the oxygen barrier pipe is brought into full play, and the pipe filled with the high-barrier graphene nanosheet layer structure is obtained.

The invention discloses a preparation method of graphene. The preparation method comprises the following steps that S1, hydrogen peroxide with the mass fraction being 35-40% is added into a reaction kettle, and the amount of the added hydrogen peroxide accounts for 55-60% of the volume of the reaction kettle; S2, expanded graphite is added into the reaction kettle, the mass ratio of the expanded graphite to the hydrogen peroxide is 1:(0.01-0.02), the temperature is raised to 200-280 DEG C under the normal pressure, and a reaction is conducted at the temperature of 200-280 DEG C for 10-20 minutes; S3, supercritical carbon dioxide is introduced into the reaction kettle for pressurizing, thus the pressure is increased to 8-15 MPa, and the pressure is maintained for 5-8 hours; S4, objects obtained in the reaction kettle is discharged and put into a homogenizer to be homogenized; and S5, the homogenized objects are dried, and then the graphene is prepared after drying. The preparation method has the advantages that stripping of graphene sheet layers is more thorough, the stripping layer number is less and more even, and environmental protection is achieved.

The invention discloses a dust-free stripping device for an environment-friendly coating, and relates to the technical field of decoration construction. The dust-free stripping device for the environment-friendly coating comprises a moving seat, wherein a fixing frame is supported on the moving seat through a lifting mechanism, a stripping mechanism used for stripping the coating is arranged at the end part of a gas collecting box, a coating accumulating used for accumulating the coating sleeves the stripping mechanism, and a reversing mechanism used for adjusting the rotating of the gas collecting box is arranged on the fixing frame. According to the dust-free stripping device for the environment-friendly coating, the horizontal and vertical orientation flexible conversion can be carriedout on the stripping mechanism used for stripping the coating through the arranged reversing mechanism, so that the coating of the wall surface and the wall top is subjected to sufficient stripping treatment; meanwhile, dust generated in the stripping process can be collected through an arranged collecting mechanism and timely sucked through a dust removal mechanism, so that dust removal operationis carried out while effective coating stripping is performed, and dust diffusion is greatly reduced; and finally, an arranged scraping disc can elastically slide relative to a hollow shaft, so thatpressing between the scraping disc and a wall coating layer is guaranteed, and the coating stripping effect is greatly improved.

The invention discloses a plastic master batch, and a preparation method and application thereof. The plastic master batch comprises a polymer matrix, graphene, a filling material, a coating agent, adispersant, an antioxidant, a crosslinking agent and an assistant crosslinking agent. Therefore, the plastic master batch has the characteristics of high thermal conductivity, high oxygen resistance,easiness in welding and uniform dispersion of graphene; and therefore, a capillary network prepared from the plastic master batch has the advantages of high thermal conductivity, high oxygen resistance and easiness in welding, so that cold and heat in a system are quickly transferred to the outside, efficient circulation of a medium is realized, energy waste is avoided, and popularization and application of a capillary network air conditioning system are facilitated.

The invention provides a nano-fluid, a preparation method thereof and a heat exchange device. The preparation method of the nano-fluid comprises the following steps: mixing expanded graphite with a stripping agent in a first base fluid to obtain a first mixture, and performing in-situ liquid phase stripping treatment on the first mixture to obtain a raw graphene stock containing graphene nano-sheets; and uniformly dispersing the raw graphene stock into a second base fluid to obtain the nano-fluid. The inventors have found that the method is simple and convenient to operate, facilitates large-scale production, is safe and environment-friendly, and can obtain the nano-fluid with high heat transfer coefficient, high thermal conductivity, low flow resistance and long-term stable dispersion.

The invention discloses a reduction cleaning agent for terylene. The reduction cleaning agent for the terylene is characterized by comprising deionized water, an unsaturated reduction system, a surfactant system and a pH value buffering system, in parts by mass: 84 to 35 parts of the deionized water, 10 to 50 parts of the unsaturated reduction system, 5 to 10 parts of the surfactant system and 1 to 5 parts of the pH value buffering system. The reduction cleaning agent for the terylene is stable in state, avoids heating and spontaneous combustion conditions, does not have pungent smell, is convenient to transport and store, and has an excellent cleaning effect.

The invention discloses a self-repairing environmentally-friendly rubber material and a preparation method thereof, and relates to the field of self-repairing rubber. The self-repairing environmentally-friendly rubber material comprises the following components: a butyl rubber substrate, a self-repairing filler, a toughening anti-stretching filler, and a vulcanization auxiliary agent dispersion, wherein the vulcanization auxiliary agent dispersion is composed of zinc oxide, bentonite, sodium carboxymethylcellulose, accelerator TMTD and expanded graphite. The preparation method comprises the following steps: performing ball milling to obtain the vulcanization auxiliary agent dispersion, performing mixing, and performing vulcanization to obtain the rubber material. The preparation method provided by the invention does not requires harsh conditions and is simple and controllable, and the finished rubber material produced by vulcanization can achieve a good repairing effect in air atmosphere without adding other repairing systems and thermoplastic components; and the rubber material has tear strength of 26.5 KN/m, tensile strength of 10.9 MPa, impact resilience of 62%, and self-repairing property of 74.6%.

The invention relates to tin-soldering resistant polybutylece terephthalate (PBT) engineering plastic and a method for preparing the same. The PBT engineering plastic comprises the following raw material by weight percent: 40-45 percent of PBT, 9-16 percent of flame retardant of decabromodiphenyl ethane, 3-6 percent of antimony trioxide, 1-5 percent of plasticizer of ethylene-butyl acrylate-glycidyl ester terpolymer, 0.1-0.5 percent of compound anti-aging agent of Belta-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid octadecanol ester, 0.1-0.5 percent of pentaerythritol bis-phosphite ester (2, 4-di-tert-butyl-phenyl), 25-35 percent of short glass fiber, 3-6 percent of modified polytetrafluoroethylene TN3500 and 1-4 percent of release agent of polyethylenewax. The total weight percent of the raw materials is 100. The tin-soldering resistant PBT engineering plastic has low price and low requirement for the mold injecting and molding equipment.

The invention relates to a preparation method of an epoxy resin grafted montmorillonite filler. The montmorillonite filler is prepared from the following raw materials: 100 of montmorillonite, 1-45 of organic amine, protonating agent same molar equivalent with organic amine, 0.5-300 of epoxy resin, 100-10000 of dispersant, and 10-5000 of solvent. The preparation method comprises the following steps of: firstly preparing organized montmorillonite; then adding epoxy resin to the organic montmorillonite, adding the solvent to regulate the viscosity of the reaction system, reacting at the temperature range of 15-140 DEG C for 1-24 hours, introducing epoxy resin molecules to the nano laminar surface of montmorillonite, and remaining the rest epoxide group; and stripping the nano lamella of montmorillonite to obtain the epoxy resin grafted montmorillonite filler. The obtained filler has few defects and pores, and can form a densified protective layer in an anti-corrosion coating, thereby significantly improving anticorrosion effect and service life of the anti-corrosion coating.

The invention relates to the field of building waterproof materials and particularly relates to an aqueous antistatic acrylate waterproof coating and a preparation method thereof. The aqueous antistatic acrylate waterproof coating comprises, by mass, 35 to 45 parts of an acrylate emulsion, 0.2 to 5 parts of graphene oxide, 3 to 12 parts of an emulsified eco-friendly plasticizer, 1 to 2 parts of adefoamer, 2 to 4 parts of a dispersant, 1 to 2 parts of a wetting agent, 0.5 to 1.5 parts of a preservative, 0.5 to 3 parts of a thickener diluent, 35 to 40 parts of heavy calcium carbonate, 10 to 20parts of quartz powder, 1 to 2 parts of a multifunctional aid APM-95 and 4 to 8 parts of water. The aqueous antistatic acrylate waterproof coating significantly improves the antistatic performances ofa waterborne acrylic waterproof coating and has tensile strength of greater than or equal to 1.22MPa and the elongation at break of greater than or equal to 359%.

The invention provides a preparation technology of a graphene oxide toughened alumina-based ceramic cutter, and relates to the technical field of ceramic cutters. The preparation technology comprisesthe following steps: (1) adding graphene oxide into anhydrous ethanol, and adding polyethylene glycol and alumina powder to obtain a powder slurry I; (2) mixing anhydrous ethanol with polyethylene glycol, and adding beta-SiC nanoparticles, TiC whiskers and a sintering aid to obtain a powder slurry II; (3) performing ball milling to obtain a composite slurry; (4) drying and sieving the composite slurry to obtain a composite powder; (5) carrying out pre-pressing forming; and (6) carrying out vacuum hot-pressing sintering on the obtained pre-pressed green body. The graphene, TiC whiskers and beta-SiC nano-particles have synergistic effects, so the reinforcing and toughening effects are good, the dispersity of all the raw materials in the preparation process is high, and the prepared ceramic cutter has excellent mechanical properties, high toughness and strength and good wear resistance.

The invention discloses a method for dyeing cotton and viscose polyester fabrics by combining overflow dyeing and continuous dyeing, which comprises the steps of A, invert-sewing cotton and viscose-polyester grey fabrics to obtain a product A; B, performing alkaline-oxygen pretreatment on the product A and then performing cold stacking to obtain a product B; C, tightly desizing and bleaching the product B to obtain a product C; D, singeing the product C to obtain a product D; E, presetting the product D to obtain a product E; F, performing high-temperature high-pressure overflow dyeing on theproduct E with disperse dyes to obtain a product F; G, stripping and washing the product F to obtain a product G; H, drying the product G to obtain a product H; I, carrying out continuous dyeing on the product H with reactive dyes to obtain a product I; J, post-finishing the product I to obtain a product J; K, preshrinking the product J to obtain a product K; and L, inspecting and packaging the product K to obtain a finished product. According to the invention, the dyeing efficiency is high, the vat difference is small, the fastness is good, the gram weight reduction is small, and the elasticity of the dyed stretch fabrics is good.