14results about How to "Avoid brittle" patented technology

The application belongs to the technical field of flexible conductive materials for medical rehabilitation devices, and discloses a semi-invasive antibacterial electric stimulation rehabilitation hydrogel flexible electrode, which is prepared from a PVA-CMC-Na-HA-calcium propionate four-element synergistic system hydrogel and is surface-modified by sodium L-lactate; a three-dimensional network is constructed through one-pot physical crosslinking, polyvinyl alcohol and sodium carboxymethyl cellulose form a hydrogen bond interpenetrating network, hydroxyapatite is used as a rigid filler for reinforcement, and calcium propionate simultaneously acts as an ionic crosslinking agent and an electrolyte; sodium L-lactate forms a hydrophobic-hydrophilic gradient layer on the surface of the hydrogel in situ through an esterification reaction. The application solves the problems of mechanical mismatch, high impedance, poor biocompatibility of traditional metal electrodes, and the difficulty of simultaneously considering the strength, toughness and lubricity of existing hydrogels, realizes the mechanical properties of strong outside and tough inside of the electrode, has excellent biocompatibility and low impedance electric stimulation performance, does not need external conductive paste, and improves the comfort and safety of pelvic floor muscle rehabilitation treatment.

The application provides a production method of high-corrosion-resistance and high-strength galvanized steel strand, relates to the technical field of hot-dip plating, and comprises the following steps: collecting hot-dip plating related characteristic parameters and setting basic hot-dip plating time; pre-processing the hot-dip plating related characteristic parameters and outputting a hot-dip plating calibration coefficient; establishing a coupling formula and obtaining a hot-dip plating calibration time; collecting strength interference characteristic parameters; based on the collected strength interference characteristic parameters and the obtained actual hot-dip plating required time, calculating a tensile strength prediction score of the produced galvanized steel strand, and determining the eligibility of the galvanized steel strand prepared under the current working condition parameters. The application calculates a most suitable galvanizing time, ensures that the zinc layer is fully penetrated, and avoids excessive reaction to cause the steel strand to be brittle. Meanwhile, the application can predict whether the tensile strength of the finished product is qualified before production, realizes dynamic optimization, early warning and self-learning in the whole process, and effectively reduces the waste product rate.

The application discloses a drainage bag with an antibacterial functional layer and a preparation process thereof, and relates to the technical field of medical materials, and comprises the following steps: adding modified montmorillonite into N, N'-dimethylacetamide, uniformly mixing through ultrasonic, adding a polyurethane film, ultrasonic immersion for 60-120 min, drying, and obtaining a drainage bag substrate; adding polylactic acid into N, N-dimethylformamide, uniformly stirring and mixing, adding modified nano zinc oxide, uniformly mixing through ultrasonic, and then performing electrospinning to obtain an antibacterial coating fiber film; placing the antibacterial coating fiber film on the inner side surface of the drainage bag substrate, high-frequency heat sealing, assembling, and obtaining the drainage bag.

This application relates to the field of plastic film molding and processing, and discloses a multilayer co-extruded film for winter sheds in aquaculture and its preparation method. It is produced by co-extrusion and blown film blowing of an outer layer, a first adhesive layer, a middle layer, a second adhesive layer, and an inner layer. The inner layer contains the following weight percentages: 63-71% composite metallocene low-density polyethylene, 10-20% low-density polyethylene, 5-10% modified toughening masterbatch, 5-8% anti-fogging and anti-dripping agent, 0.5-1% UV stabilizer, 0.5-1% UV absorber, 0.2-0.5% antioxidant, and 2.5-5% processing aid. The modified toughening masterbatch contains EPDM rubber, and the anti-fogging and anti-dripping agent is obtained by melt extrusion and granulation of styrene-octene-glycidyl methacrylate copolymer, vinyl elastomer, acrylic modified silicone, long-chain carboxylic acid ester polyoxyethylene, and pentaerythritol stearate. Advantages: good anti-dripping, puncture and tear strength, good low-temperature toughness, and not easily cracked or damaged.

A wire-shaped grinding element (10) is used as a grinding element for a polishing brush. The wire-shaped grinding element (10) includes inorganic filaments and a resin that impregnates the inorganic filaments and is cured. The inorganic filaments contain 80 to 90% by weight of an alumina component and 20 to 10% by weight of a silica component. The crystal structure of the inorganic filaments includes mullite crystals and intermediate alumina. The mullite crystals have an average grain size smaller than 25 nm.

The invention provides a production method of a high-corrosion-resistance and high-strength galvanized steel strand, and relates to the technical field of hot dipping processes, and the production method comprises the following steps: collecting relevant characteristic parameters of hot dipping, and setting basic hot dipping time; the hot dipping relevant characteristic parameters are preprocessed, and a hot dipping calibration coefficient is output; a coupling formula is established, and hot dipping calibration time is obtained; acquiring intensity interference characteristic parameters; and calculating a tensile strength prediction score of the produced galvanized steel strand based on the acquired strength interference characteristic parameters and the acquired actual hot dipping time, and performing qualification judgment on the galvanized steel strand prepared under the current working condition parameters. According to the method, by calculating the most appropriate galvanizing time, it is guaranteed that a zinc layer permeates in place, and steel wire embrittlement caused by excessive reaction is avoided; meanwhile, whether the tensile strength of the finished product is qualified or not can be predicted before production, dynamic optimization of the whole process is achieved, early warning and self-learning are achieved, and the rejection rate is effectively reduced.

The invention discloses an organic-inorganic hybrid composite dust suppressant with rolling compaction resistance and a preparation method thereof. The organic-inorganic hybrid composite dust suppressant comprises the following raw material components in percentage by weight: (A) 10-20% of an organic-inorganic hybrid polymer; (B) 1%-3% of an inorganic nano material; (C) 1%-3% of a humectant; (D) 0.15%-0.45% of a wetting penetrant; (E) 0.75%-3% of a stable dispersion system; and (F) water: the balance being water, wherein the total percentage is 100%. Comprising the following steps: preparing a water-phase base solution, preparing an oil-phase pre-emulsion, carrying out in-situ hybridization polymerization, and carrying out functional compounding. A cured layer formed after the prepared composite dust suppressant is applied to mine road dust control can lock moisture for a long time and prevent a cured shell layer from shrinking and embrittling due to excessive drying, the composite dust suppressant has enough mechanical strength and excellent toughness, and organic-inorganic components of the composite dust suppressant must have a strong interface chemical binding force, so that the composite dust suppressant has a very good application prospect. And rolling impact and shearing of heavy-load vehicles can be effectively resisted.

The utility model relates to natural gas pressure regulating technical field, concretely relates to a CNG pressure regulating device for generator, the auxiliary heater of this design provides external heat supplement for the CNG gas that passes through pressure reducing valve through electric heating or engine circulating water heating mode, prevents system icing, avoids blocking pressure reducer valve, diaphragm hole and gas pipeline, thereby guarantees gas continuous supply and engine stable operation, simultaneously, the suitable temperature environment maintained by auxiliary heater protects the sealing element such as rubber diaphragm and O ring in the pressure reducer, prevents its hardening, fragile because of extremely low temperature, has guaranteed the sealing property and functional effectiveness of pressure reducer, besides, multistage pressure reducing valve cooperates intelligent flowmeter, has realized the accurate control and stable output of gas pressure, has reduced the influence of gas temperature fluctuation to density, and then has guaranteed the accurate control of engine electronic control unit to air-fuel ratio, has improved engine power, acceleration performance and combustion efficiency.

This invention discloses an environmentally friendly and efficient dry strength agent for papermaking based on zwitterionic polymers and its preparation method, belonging to the field of papermaking chemical technology. The active ingredient of this dry strength agent is a graft copolymer of quaternized chitosan with sulfobetaine methacrylate (SBMA) and acrylamide (AM). The preparation method includes: first, reacting chitosan with 2,3-epoxypropyltrimethylammonium chloride to obtain water-soluble quaternized chitosan; then, initiating a redox initiation system to perform a graft copolymerization reaction between the quaternized chitosan and SBMA and AM, followed by precipitation and drying to obtain a solid product. This invention uses biomass chitosan as the main chain, which is green and biodegradable; the grafted SBMA side chains have an anti-polyelectrolyte effect, allowing the molecular chain to extend in high anionic interference systems such as waste paper pulp, resulting in strong anti-interference ability; simultaneously, the introduction of AM flexible segments improves paper dry strength while also enhancing flexibility and providing retention and filtration functions. Compared with existing dry strength agents, the product of this invention has superior strengthening effect, stronger adaptability, and better environmental friendliness.

The application relates to the field of metal material heat treatment, and discloses a high-strength anti-breaking saw chain low-temperature carburizing heat treatment process, which comprises the following steps: loading dried 68CrNiMo alloy steel saw chain buckles into a controllable atmosphere multi-purpose furnace, replacing with high-purity nitrogen and keeping a micro positive pressure, establishing a reducing basic atmosphere after constant temperature heating, executing asynchronous pulse alternating circulation under constant temperature, and the circulation comprises the following steps in sequence: first stage, dripping anti-coking adjusting liquid to control surface coking; second stage, dripping interface replacement adjusting liquid and synchronously passing nitrogen to remove surface adsorbents and restore activity; third stage, restoring dripping of industrial-grade pure methanol to reestablish a carburizing atmosphere; and after the circulation, replacing, cleaning, cooling and taking out the furnace. Through pulse alternating circulation, the application realizes periodic switching of anti-coking and carburizing absorption, maintains a channel for carbon atom inward diffusion, avoids hindering of carbon deposition on the carburizing process, and improves the depth of the carburizing strengthened layer and the overall mechanical strength of the saw chain.

The invention relates to the technical field of traditional Chinese medicine preparations, in particular to a compound emblic leafflower fruit sore-throat relieving lozenge film-coated tablet for treating throat diseases and a preparation method thereof. The compound emblic leafflower fruit sore-throat relieving lozenge film-coated tablet for treating throat diseases comprises a tablet core and a film coating layer wrapping the tablet core, the tablet core comprises phyllanthus emblica dry paste powder, compound dry powder, menthol, borneol, corn starch, sucrose powder and hydroxypropyl methylcellulose; the compound dry powder is a water extract of a mixture of radix scrophulariae, platycodon grandiflorum and liquorice; the weight ratio of the corn starch to the sucrose powder to the hydroxypropyl methylcellulose is (0.5-15): (45-60): (0.5-8); the film coating layer comprises gelatin; the weight ratio of the gelatin to the hydroxypropyl methylcellulose is (0.5-8): (0.3-3). The compound emblic leafflower fruit sore-throat relieving lozenge film-coated tablet for treating throat diseases has good storage stability, and the appearance and palatability are improved.

The application discloses a preparation method of high-strength flexible cable insulation material and belongs to the technical field of cable insulation material preparation. The preparation method comprises the following steps: preparing a ternary compounded matrix of linear low-density polyethylene (LLDPE), ethylene-vinyl acetate copolymer (EVA) and ethylene-octene copolymer (POE); performing surface modification on a nano-silicon dioxide and hydroxylated multi-walled carbon nanotube composite filler by using a silane coupling agent KH550; and accurately controlling the mass ratio of a peroxide diisopropylbenzene initiator and a grafted monomer ethenyl trimethoxysilane to be 0.03-0.05, and then preparing the insulation material through melting blending, controllable grafting and warm water crosslinking. The preparation method of the high-strength flexible cable insulation material adopts a ternary compounded system of LLDPE, EVA and POE, LLDPE provides basic mechanical strength and electrical insulation, EVA improves the flexibility and adhesion of the material to the conductor, and POE significantly improves the low-temperature impact resistance and bending resistance of the material, and the three components synergistically make the material have high strength and high flexibility.

The invention belongs to the technical field of solid-state electrolytes, and particularly relates to a lithium lanthanum zirconium oxide and polyacrylonitrile composite solid-state electrolyte, a preparation method and application thereof and an all-solid-state battery. The preparation method comprises the following steps: 1) preparing cubic phase LLZTO powder; (2) carrying out surface silanization treatment on the cubic phase LLZTO powder under an acidic condition; 3) preparing polyacrylonitrile, a polyion liquid, a lithium salt and the cubic phase LLZTO of which the surface is silanized into composite electrolyte slurry at room temperature; and 4) casting the composite electrolyte slurry to form a film, and then performing vacuum drying to obtain the lithium lanthanum zirconium oxide and polyacrylonitrile composite solid electrolyte. The LLZTO and polyacrylonitrile composite solid electrolyte provided by the invention can integrate the advantages of organic and inorganic materials, solves the problem of contact between traditional polyacrylonitrile and LLZTO and a positive electrode side interface, and realizes a stable composite structure with high voltage resistance, high temperature resistance and high ionic conductivity.

The application provides a low-temperature adaptive packaging adhesive film composition, a low-temperature adaptive packaging adhesive film and a preparation method thereof, a photovoltaic module and a photovoltaic system, and relates to the photovoltaic field. The raw materials of the low-temperature adaptive packaging adhesive film composition include, according to the total mass of 100%, 40%-60% of a copolymer resin, 15%-30% of a modified thermoplastic elastomer, 5%-15% of an additive and 10%-20% of a filler; the copolymer resin includes an ethylene-acrylate-norbornene terpolymer; and the raw materials of the modified thermoplastic elastomer include maleic anhydride and a styrene thermoplastic elastomer. The low-temperature adaptive packaging adhesive film composition can still maintain good flexibility in a low-temperature environment, and will not become hard and brittle due to low temperature, thereby effectively avoiding problems such as rupture and delamination caused by the brittleness of the adhesive film.