141results about How to "Excellent mechanical properties" patented technology

The invention relates to a spinel type high-entropy oxide photo-thermal super-hydrophobic anti-icing coating. The anti-icing coating is prepared from the following raw materials in parts by weight: 10 to 20 parts of spinel type high-entropy oxide, 20 to 40 parts of epoxy resin, 1 to 5 parts of stearic acid solution, 1 to 5 parts of polymethyl methacrylate solution, 5 to 10 parts of polydimethylsiloxane, 0.1 to 1 part of flatting agent, 0.1 to 1 part of dispersing agent, 0.1 to 1 part of defoaming agent, 0.5 to 1 part of curing agent and 30 to 60 parts of solvent. The spinel type high-entropy oxide is a powder material with the particle size of 50-600 nm, and the molecular formula of the spinel type high-entropy oxide is (A) 3O4. Meanwhile, the invention further discloses a preparation method of the coating. A coating prepared from the coating disclosed by the invention realizes coupling characteristics of photothermal conversion and super-hydrophobicity, not only has excellent super-hydrophobicity and light absorption characteristics, but also has good performance stability and durability in corrosion and wear environments.

The invention relates to the field of new energy storage materials, and discloses a multifunctional composite perfluorosulfonic acid ion exchange membrane for an all-vanadium redox flow battery, and the composite membrane comprises the following components: perfluorosulfonic acid resin which accounts for 60-90wt% of the total mass of the membrane and is used as a matrix material; the functionalized multi-walled carbon nanotube accounts for 5-15 wt.% of the total mass of the membrane, and carboxyl and hydroxyl are introduced through surface treatment; phosphotungstic acid accounts for 5-20wt.% of the total mass of the membrane, and is anchored on the surface of the functionalized multi-walled carbon nanotube through an electrostatic spinning process; n, N-dimethylformamide and isopropanol are used as solvents, and the solvents are mixed with a perfluorinated sulfonic acid resin solution according to the volume ratio of 1: 1. The proton conductivity, the vanadium ion barrier property and the tensile strength of the composite membrane are obviously superior to those of a traditional Nafion membrane. According to the technical scheme, an efficient and economical solution is provided for improving the overall performance of the all-vanadium redox flow battery, and the method has good application prospects and market value.

The invention discloses a carbon nanotube mechanical property analysis method based on machine learning molecular dynamics, and relates to the technical field of carbon nanotube mechanical property analysis. The diameter, the length and the defect proportion serve as variables to construct a structure parameter library; the temperature and the strain rate serve as supplementary variables to establish a tensile model parameter library; carrying out molecular dynamics simulation analysis on tensile mechanical properties; drawing a stress-strain curve and extracting key parameters; establishing a parameter association library between the structural parameters and the mechanical properties by using a machine learning method; selecting a machine learning algorithm to predict mechanical properties; and extracting a function relationship through the trained machine learning model to establish a fitting function. Starting from the relationship between different diameters, lengths, defect proportions, temperatures and strain rates and the mechanical properties of the carbon nanotubes, the optimal structure parameters of the carbon nanotubes under specific conditions are obtained through machine learning, the calculation amount is greatly reduced, the experiment cost is saved while the effectiveness of the model is ensured, and the research efficiency is remarkably improved.

The invention provides a water-based odorless elastic interior wall coating which is prepared from the following components in parts by weight: 28 to 38 parts of acrylate emulsion, 5 to 15 parts of hyperbranched polysiloxane, 0.1 to 0.5 part of pH (Potential of Hydrogen) regulator, 0.1 to 0.3 part of hydroxyethyl cellulose, 0.1 to 0.2 part of preservative, 0.1 to 0.2 part of wetting agent, 0.1 to 0.5 part of dispersing agent, 0.3 to 0.4 part of defoaming agent, 15 to 25 parts of titanium dioxide, 1 to 7 parts of kaolin, 5 to 15 parts of calcium carbonate, 0.1 to 0.5 part of coalescing agent, 0.1 to 2 parts of anti-freezing agent, 0.05 to 0.2 part of thickening agent and 30 to 50 parts of water. The hyperbranched polysiloxane is prepared by reacting 1, 3-bis (dichloromethyl)-1, 1, 3, 3-tetramethyldisiloxane with 2, 2-diglycolic acid at the temperature of between 70 and 100 DEG C. The invention further discloses a preparation method of the hyperbranched polysiloxane. The water-based odorless elastic interior wall coating provided by the invention has good mechanical properties, weather resistance and water resistance.

The present invention relates to a composite electrolyte exhibiting improved mechanical properties and ion conductivity while preventing liquid leakage, a method for preparing the same, and a lithium secondary battery comprising the same. The composite electrolyte may include: a liquid electrolyte; a cross-linked polymer of monomers having curable functional groups; and oxide-based solid electrolyte particles dispersed on the cross-linked polymer and having a particle diameter of greater than 300 nm.

The utility model discloses a novel armored cable, and belongs to the technical field of armored cables. Comprising a plurality of semi-conductive conductor shielding sleeves, a plurality of conductor cores are arranged in the semi-conductive conductor shielding sleeves, the peripheries of the semi-conductive conductor shielding sleeves are fixedly sleeved with an electromagnetic shielding sleeve, the outer wall of the electromagnetic shielding sleeve is sleeved with a fireproof layer, the outer wall of the fireproof layer is sleeved with a non-metal armor layer, and the outer wall of the non-metal armor layer is sleeved with a fireproof layer. A plurality of supporting strips are arranged in the non-metal armor layer and are annularly and uniformly distributed, and the supporting strips in the non-metal armor layer are made of carbon fiber reinforced plastic materials, so that the non-metal composite materials have excellent mechanical strength and light weight characteristics, the mechanical protection performance of the cable can be ensured, and the service life of the cable is prolonged. The weight of the cable is remarkably reduced, laying and installation are facilitated, the elastic bands are installed between the adjacent supporting strips, the multiple supporting strips can be evenly distributed on the outer wall of the fireproof layer through installation of the elastic bands, and meanwhile the multiple supporting strips can be conveniently fixed.

The invention relates to an anti-impact-damage composite grouting anchor rod, a construction method and application of the anti-impact-damage composite grouting anchor rod to rockburst prevention, the grouting anchor rod comprises an anchor rod body with a center channel and a spacer arranged in the center channel of the anchor rod body, and the end portion of the first end of the anchor rod body is sleeved with an expansion sleeve; the periphery of the expansion sleeve is expanded when the anchor rod is tightly ejected relative to the expansion sleeve, a plurality of through holes are formed in the position, between the first end and the partition plate, of the anchor rod, a limiting groove is formed in the position, close to the partition plate, in the anchor rod, an anchor connector is arranged in the limiting groove in a bearing mode, the anchor connector is connected with a prestressed pipe, and the right end of the prestressed pipe penetrates out of the second end of the anchor rod. A thread and a nut connected with the thread are arranged at the right end of the prestressed pipe, a resisting disc is connected between the nut and the second end of the anchor rod in an abutting mode, and a conveying pipe capable of penetrating through the spacer is arranged in a center hole of the prestressed pipe. The grouting anchor rod not only can resist tensile failure, but also can prevent shear failure, and the adaptability of anchor rod construction to complex geological environments is improved.

The invention relates to the technical field of battery packs, and discloses a bottom protection structure for a battery pack and the battery pack, the bottom protection structure for the battery pack comprises a liquid cooling plate, a bottom protection plate and a buffer layer; the bottom of the liquid cooling plate comprises a non-flow channel area and a protruding flow channel area; the bottom protection plate is arranged at the bottom of the liquid cooling plate, and the bottom protection plate and the liquid cooling plate are arranged at intervals; the buffer layer is arranged between the liquid cooling plate and the bottom protection plate, and the bottom of the buffer layer abuts against the bottom protection plate; in the flow channel area, the top of the buffer layer abuts against the liquid cooling plate; according to the present invention, the impact force can be effectively absorbed and dispersed when the different regions of the battery pack are impacted so as to ensure that the battery cells in the battery pack are not extruded when the battery pack is subjected to the external force effect, such that the battery pack can be prevented from being damaged, and the battery pack is prevented from being damaged. And the protection level of the battery cells in the battery pack is improved, and the overall safety of the battery pack is ensured.

The invention relates to the technical field of polarizing beam splitters, in particular to a polarizing beam splitter and a preparation method and application thereof. The polarizing beam splitter provided by the invention comprises a diamond substrate, a polarizing beam splitting film and a first metalized film layer which are positioned on the surface of one side of the diamond substrate, a broadband antireflection film positioned on the surface of the other side of the diamond substrate, and a second metalized film layer positioned on the side surface of the diamond substrate, the first metallized film layer is located at the edge position of the surface of one side of the diamond substrate. Diamond is adopted as a substrate material of the polarizing beam splitter, and the characteristic of high thermal conductivity of the diamond is utilized, so that heat generated when laser acts on a film layer and a substrate can be quickly conducted as soon as possible, and damage to the polarizing beam splitter caused by local temperature rise is relieved; the edge of the polarizing beam splitter is metalized, so that the beam splitter body and a metal tube shell or a water cooling structure can be integrally welded, and a high-reliability and low-leakage-rate vacuum sealing solution can be provided while the heat conduction efficiency is improved.

The invention provides 3D printing plant-based protein double gel with intelligent responsiveness and a preparation method thereof.The protein double gel comprises a water-soluble gel composition and an oil-soluble gel composition, the water-soluble gel composition comprises plant protein, water, water-soluble nutrients and a water-soluble indicator, and the oil-soluble gel composition comprises an oil-soluble nutrient and an oil-soluble indicator; the oil-soluble gel composition includes an oil gel, a vegetable oil, a fat-soluble nutrient, and a fat-soluble indicator. According to the 3D printing plant-based protein double-gel with the intelligent responsiveness, a stable protein double-gel system is constructed through the interaction between the oil gel and the hydrogel, good mechanical stability is achieved, various nutrient elements are enriched in the same product, the nutritional value of the product is increased, and the 3D printing plant-based protein double-gel with the intelligent responsiveness has a good application prospect. The protein double gel also has good 3D printing adaptability and sensitive external environment stimulation responsiveness, changes of nutrients of the product in different processing and preservation processes are fed back by using sensory characteristics of the product, and visual monitoring of the nutritional value of the product is realized.

The invention relates to a bio-based polyurethane foam mulching film composition and a preparation method and application thereof.The mulching film composition comprises a component A and a component B. The component A comprises soybean oil polyol, nano cellulose hydrogel, a foam stabilizer and a catalyst, and the catalyst is an organic tin catalyst and / or an amine catalyst; and the component B is isocyanate. The component A and the component B are mixed, atomized and sprayed out, and the foam film with good spraying performance and physical performance is obtained. The method not only solves the problem of excessive dependence on petroleum-based polyether polyol in the field of polyurethane foam, but also does not need to additionally introduce a foaming agent. The mulching film not only has heat preservation and moisture preservation functions of a traditional mulching film, but also has biodegradability, is beneficial to reduction of soil pollution, and meets the requirements of environmental protection and sustainable development. The method is simple and feasible, and is suitable for large-scale production, popularization and application.

The present invention discloses a thin covering film with EMI function, which comprises a carrier layer, a first insulating layer, a metal layer, a second insulating layer, a second adhesive layer and a release layer which are stacked. The covering film has the function of insulating the covering film from an electronic circuit surface and shielding the transmission signal. In terms of manufacturing process, the covering film and the shielding film are combined into one, and the process difficulties of the two are combined to achieve a thickness thinner than the covering film, and the thickness can even reach 9-10 μm, which does not affect the product function and reduces the process steps and the production cost. In terms of product physical properties, the surface has high hardness, extremely low gloss, good mechanical properties, and good shielding effect. In terms of later storage, since the present invention contains EMI in the covering film, the storage method can be stored in the same way as the conventional covering film.

The invention discloses a low-loss high-temperature superconducting conductor and a manufacturing method thereof, and relates to the technical field of superconducting conductors. The low-loss high-temperature superconducting conductor of the present invention comprises: a high-temperature superconducting tape; the magnetic thin strip is wound and bound outside the high-temperature superconducting strip, and the magnetic thin strip is made of amorphous iron alloy; a gap is formed between the outer metal sheath and the high-temperature superconducting strip wound and bound with the magnetic thin strip; the low-melting-point alloy solder is arranged in the gap; during preparation, a certain number of high-temperature superconducting strips are stacked and wound and bound by the magnetic thin strip, then the high-temperature superconducting strips are inserted into the outer metal sheath, and vacuum pressure impregnation is performed between the outer metal sheath and the stacked strips wound and bound by the magnetic thin strip by the low-melting-point alloy solder; according to the invention, the magnetic field acting on the stacked strip can be obviously weakened, the alternating current loss is reduced, and the magnetic shielding effect is obvious in a high field.

The present application relates to the technical field of bamboo fiber composite material, in particular to a purification preparation method of bamboo fiber reinforced natural polymer composite material. The bamboo raw material is crushed and treated by steam explosion to obtain primary bamboo fiber; the primary bamboo fiber is sequentially subjected to organic solvent dewaxing treatment and oxidation system selective delignification treatment to obtain purified bamboo fiber; the purified bamboo fiber is treated in a tannin acid solution to form a polyphenol interface layer on the surface thereof; and a solution containing polyvalent metal ions is added to the treated bamboo fiber to form a coordination cross-linking interface layer on the surface of the bamboo fiber. The present application constructs a stable interface layer between the fiber and the natural polymer matrix. The interface layer can effectively transfer stress, significantly improve the tensile strength, bending strength and shear strength of the composite material, and solve the problem of weak interface and easy delamination of traditional natural composite materials.

A method for preparing a high-temperature ablation-resistant chopped carbon fiber reinforced SiBCN‑MAS composite material, which relates to a method for preparing a SiBCN ceramic-based composite material. The present invention aims to solve the problem that the existing carbon fiber or cracked carbon coated carbon fiber reinforced SiBCN ceramic-based composite materials have poor contact surface bonding and limited improvement in high-temperature ablation resistance. Method: 1. Prepare cracked carbon coated chopped carbon fibers; 2. Prepare SiBCN amorphous ceramic powder; 3. Mix raw materials; 4. Sinter. The present invention is used for the preparation of high-temperature ablation-resistant chopped carbon fiber reinforced SiBCN‑MAS composite materials.

A series of palladium compounds described in the specification are excellent vinyl addition polymerization catalysts. Specifically, compounds represented by general formulae (I) and (II) described in the specification unexpectedly exhibit much higher reactivity than compounds known in the art in the vinyl addition polymerization of various cycloolefin monomers, and thus can form a polymer having an extremely high molecular weight. The present specification also discloses methods of forming various solid three-dimensional articles, such as solution extrusion of a polymer solution formed by vinyl addition polymerization of various cycloolefin monomers using very low amounts of a palladium compound of general formula (I) or (II) as described in the specification. Polymer films formed from the polymerizable composition exhibit unprecedented properties, such as excellent transparency properties, higher thermal and mechanical properties, and other improved properties. Thus, the films so formed can be used in a variety of optoelectronic applications. # imgabs0 #

The invention belongs to the technical field of foundation treatment in civil engineering, and discloses a device for preparing a composite foundation treatment pile body section through deep modification of waste flow-state sludge, which comprises a rigid frame, an electric hoisting mechanism, a pile body forming mechanism, a sliding bearing mechanism and a sliding releasing mechanism, the rigid frame and the electric hoisting mechanism are used for hoisting and fixing an upper closing cover of the pile body forming mechanism; the pile body forming mechanism is used for pressurizing, dehydrating and forming the mud subjected to flocculation-solidification conditioning; the sliding bearing mechanism is arranged on a rigid frame base of the device, bears the pile body forming mechanism and facilitates material filling. After the pile body sections are formed, the pile body can be separated from the pile body forming mechanism and temporarily stored or conveyed to a centralized place for maintenance through the sliding separation mechanism. Waste flow-state sludge is directly converted into a high-reinforcement solidified soil column capable of being used as a precast pile component, and then the high-reinforcement solidified soil column and a gravel drainage body are assembled, so that the effects of shortening the construction period, reducing post-construction settlement and improving the bearing capacity of a composite foundation are achieved.

Provided is a method for producing a crystalline resin sheet in which a sheet-like crystalline resin composition containing a crystalline resin and a melt-type nucleating agent is sandwiched and rolled in a molten state by a pair of nip rolls, when the radius of the pair of nip rollers is R, the average thickness of the rolled sheet is L, and the sheet pulling speed in the pair of nip rollers is V, the average elongation strain speed [epsilon] (R, L, V) in the sheet elongation direction, which is represented by a specific formula, is adjusted so as to exceed 30 s <-1 > and 80 s <-1 > or less.

A polyimide resin powder is provided, which is a polyimide resin powder containing a tetracarboxylic acid component and a diamine component. The tetracarboxylic acid component includes 3,3',4,4'-biphenyltetracarboxylic acid dianhydride and 2,3,3',4'-biphenyltetracarboxylic acid dianhydride. The diamine component includes p-phenylenediamine, m-phenylenediamine and / or 4,4'-diaminodiphenyl ether. Based on the total molar amount of the diamine component, the content of p-phenylenediamine is 70 mol% to 98 mol%, and based on the total molar amount of the diamine component, the combined content of m-phenylenediamine and 4,4'-diaminodiphenyl ether is 2 mol% to 30 mol%.

The application discloses a high-flash-point alkyd protective paint and a preparation method thereof. The paint is a single-component product and specifically comprises high-flash-point alkyd resin, mixed alkane / aromatic hydrocarbon solvent oil, pigment, filler, bentonite, dispersant, drier, anti-skinning agent and the like. The paint has the advantages of high flash point (67-70 DEG C), fast drying, anti-yellowing, impact resistance, salt water resistance, excellent adhesion, high solid content, low VOC content and the like, and can be stored and transported as common goods.

The invention discloses a rodlike carbon nitride-polydimethylsiloxane composite coating and a preparation method and application thereof.The rodlike carbon nitride-polydimethylsiloxane composite coating is prepared by mixing rodlike carbon nitride filler, polydimethylsiloxane and a curing agent, and even doping of the rodlike carbon nitride filler can effectively improve the crosslinking density of the composite coating; the adhesive force and the tensile strength of the coating are enhanced; when the composite coating is applied to the surface of a matrix, a multifunctional nano coating with mechanical reinforcement, long-acting corrosion prevention and microbial antifouling characteristics can be formed, the impedance arc radius is kept at 5.17 * 10 < 9 > omega.cm < 2 > after the composite coating is soaked for 60 days, and the composite coating shows excellent bacteriostasis and sterilization performance on chlorella and escherichia coli; the excellent biological pollution prevention characteristic is shown.

The present invention provides an odor adsorption material, adsorption system and preparation method for a landfill, which can efficiently absorb H2S in a landfill. An odor adsorption material for a landfill, the raw material of which is a recycled fine aggregate prepared from recycled construction waste and recycled powder mixed with recycled fine aggregate, and the recycled construction waste contains quicklime or slaked lime. An odor adsorption system for a landfill, the system includes at least one intermediate adsorption subsystem and a topmost closure adsorption subsystem; the intermediate adsorption subsystem includes three functional layers, which are, from top to bottom, an upper gas collection layer, an odor adsorption layer II, and a lower gas collection layer; the closure adsorption subsystem includes six functional layers, which are, from top to bottom, a vegetation layer, a drainage layer, an impermeable layer, a drainage layer, an odor adsorption layer I, and a gas collection layer I, and the materials of the odor adsorption layer I and the odor adsorption layer II are the odor adsorption materials.

The invention provides a resin composition and a molded article thereof. A resin composition according to the present invention contains a graft copolymer (A) and a thermoplastic resin (B) (excluding the graft copolymer (A) and a polylactic acid polymer (D)). ) and a fatty acid compound (C).

The invention provides a solid rotor iron core, a rotor assembly and a motor, the solid rotor iron core comprises an iron core body, the outer circumferential wall of the iron core body is provided with a plurality of annular grooves arranged at intervals along the axial direction of the iron core body, the depth of each annular groove is b, the depth b of a fundamental wave magnetic flux generated in the operation process of a motor applying the iron core body into the outer circumferential wall of the iron core body is larger than or equal to 7% and smaller than 7%. According to the solid rotor iron core, a harmonic eddy current loop is effectively cut off on the outer circumferential wall of the iron core body while closed-loop flow of fundamental wave eddy current in the iron core body is not hindered, so that the harmonic eddy current loss of the solid rotor iron core is greatly reduced, the efficiency and mechanical characteristics of a solid rotor motor are improved, and the service life of the solid rotor motor is prolonged. And popularization and application of the solid rotor iron core in the industry are facilitated.

The invention provides a solid-liquid rocket engine grain embedded with metal wires and application of the solid-liquid rocket engine grain. The solid-liquid rocket engine grain embedded with the metal wires comprises a grain body of a hollow cylindrical structure. Wherein metal wires are embedded between the grain bodies. According to the solid-liquid rocket engine grain, a large amount of heat can be released based on combustion of the metal wires, the combustion temperature can be increased, the combustion efficiency can be improved, the good heat conductivity of the metal wires is utilized, the heat conduction effect can be achieved in the solid-liquid rocket engine grain, and therefore the combustion speed is increased. Meanwhile, the embedded metal wires can further improve the tensile strength and rigidity of the grain, and the shape of the grain can be kept.

The present application relates to the field of organic solar cells, and provides a kind of full asymmetric small molecule donor SMD-Asy and its preparation method and application.The SMD-Asy is connected by Stille coupling from asymmetrically substituted conjugated BDTT core and acceptor unit, and the side chain and main chain structure are all asymmetrically distributed.The preparation of the small molecule donor includes: constructing thiophene and benzo dithiophene diketone BDTT intermediate, introducing long-chain alkoxy side chain under phase transfer catalysis condition, obtaining tin precursor by low-temperature lithiation, and then coupling with halogenated acceptor unit to obtain target molecule.Due to the simultaneous asymmetric design of main chain-side chain, SMD-Asy can regulate the phase separation scale and chain conformation of blended film as the third component in PM6:Y6 system, thereby improving the hole / electron transport balance and mechanical ductility, so that the device can ensure high photovoltaic performance while improving the cracking strain rate.The small molecule donor of the present application is suitable for flexible and stretchable organic solar devices.

Provided are: a methacrylic resin in which the proportion of structural units derived from methyl methacrylate is 98% by mass or more, the weight-average molecular weight (Mw) as measured by gel permeation chromatography (GPC) is 400,000 or more, the ratio (Mw / Mn) of the weight-average molecular weight (Mw) to the number-average molecular weight (Mn) is 1.6-2.8, and the content of the structural units derived from methyl methacrylate in the methacrylic resin is 100% by mass or more; the syndiotacticity represented by triad is 55% or more, the 5% weight loss temperature is 300 DEG C or more, and the residual rate of the chain transfer agent is 0.005 mass% or less. Also provided are a resin composition and a coating material containing the methacrylic resin, a resin film containing the methacrylic resin, and a polarizing plate and a display device obtained using the resin film.

A lignin-modified novolac-type phenol resin having a weight average molecular weight of equal to or more than 5500.

Provided is an aluminum alloy forging having excellent mechanical properties and corrosion resistance at room temperature. An aluminum alloy forging having a Cu content in the range of 0.3 mass% to 1.0 mass% (inclusive), an Mg content in the range of 0.63 mass% to 1.30 mass% (inclusive), and an Si content in the range of 0.45 mass% to 1.45 mass% (inclusive), the remainder comprising Al and unavoidable impurities, [Mg content] 1.587 > =-4.1 * [Cu content] 2 + 7.8 * [Cu content]-1.9 and [Si content] 2.730 > =-4.1 * [Cu content] 2 + 7.8 * [Cu content]-1.9 are satisfied, and the ratio Q1 / Q2 of the integrated intensity Q1 of the X-ray diffraction peak of the CuAl2 phase to the integrated intensity Q2 of the X-ray diffraction peak of the (200) plane of the Al phase obtained by X-ray diffraction is 2 * 10-1 or less.

This is to provide a polyamide resin composition that has good mechanical characteristics such as tensile characteristics, bending characteristics and impact resistance, and low water absorption. The polyamide resin composition of the present invention comprises 55 to 78% by mass of an aliphatic polyamide resin (A), 20 to 35% by mass of glass fiber (B), 1 to 9% by mass of a crosslinking agent (C), 0.1 to 1.5% by mass of a heat-resistant agent (D) and 0 to 6% by mass of an inorganic filler other than glass fiber (E) in 100% by mass of the polyamide resin composition, and the aliphatic polyamide resin (A) has an average number of carbon atoms per one amide group of exceeding 6.