2556 results about "Covalent bond" patented technology

The invention relates to the technical field of high polymer materials, and particularly provides a self-repairing type UV curing alumite color layer coating and a preparation method thereof. The water-based ink is prepared from, by weight, 30-50 parts of polyurethane acrylic resin, 10-25 parts of modified acrylic oligomer containing dynamic covalent bonds, 2-5 parts of photoinitiator, 3-8 parts of hydrophobic modified nano filler and 1-3 parts of cross-linking agent, and the dynamic covalent bonds are selected from at least one of hydrazide bonds, boric acid ester bonds and Diels-Alder bonds. By introducing a gradient energy collaborative network of dynamic covalent bonds and quadruple hydrogen bonds, rapid self-repairing of the coating at normal temperature and thermal triggering recombination of deep damage are achieved, and meanwhile through the micro-phase separation design of the hydrophobic core-shell filler and the graft modified silicon carbide nanowires, the hydrolysis resistance is improved.

The invention relates to the technical field of metal surface protection, and discloses a corrosion-resistant self-repairing metal fastener and a preparation method thereof.The corrosion-resistant self-repairing metal fastener comprises a zinc alloy matrix, a nanometer passivation layer, a slow-release corrosion-resistant layer and a self-repairing functional layer, and the nanometer passivation layer, the slow-release corrosion-resistant layer and the self-repairing functional layer sequentially wrap the zinc alloy matrix; the zinc alloy matrix consists of Al, Cu, Mg, Ce and Zn; the nano passivation layer adopts zinc phosphate / silane composite sol to construct a Si-O-P covalent bond network, and plasma is combined to graft epoxy groups to enhance the interface bonding strength; the slow-release anti-corrosion layer is used for loading a pH response type benzotriazole derivative through gradient aperture mesoporous silica, so that the dynamic controlled release of a corrosion inhibitor is realized; the self-repairing functional layer adopts a synergistic effect of a mechanical triggering type sulfydryl siloxane microcapsule and a pH triggering type EDTA chelating agent microcapsule to form a physical plugging-chemical passivation dual-mode repairing mechanism. Through four-stage cooperation of matrix modification, interface strengthening, slow-release regulation and control and intelligent repair, the corrosion resistance of the corrosion-resistant self-repairing metal fastener in a complex environment is remarkably enhanced.

The invention discloses reactive compatible ACR-PHA core-shell latex and application thereof, and belongs to the field of polymer chemistry and material science. The latex comprises composite particles with core-shell, gradient core-shell, raspberry-shaped or Janus heterostructure, interfaces of ACR phase and PHA phase of the latex are connected through covalent bonds, and the compatibility problem of physical blending is fundamentally solved. The latex particles have a Z-average particle size of 80-400 nm, a PDI of less than or equal to 0.30, and a minimum film formation temperature (MFFT) of-10 to 12 DEG C. The coating prepared by the invention has excellent high-humidity barrier stability (WVTR is less than or equal to 65g / m.d), low-temperature rapid heat sealability, water resistance, oil resistance and complete recoverability, does not contain PFAS, is an ideal alternative scheme of a traditional PE (Polyethylene) spraying film, and is suitable for the fields of food packaging paper, paper cups, bowls and the like.

The invention relates to a dynamic-covalent hybrid cross-linked hydrogel material as well as a preparation method and application thereof. The preparation method comprises the following steps: dissolving a component A-phenylboronic acid modified polymer derivative in a biocompatible medium to obtain a solution A; dissolving a component B, namely a macromolecular derivative containing a vicinal diol group, into a biocompatible medium to obtain a solution B; dissolving a component C-double bond group modified polymer derivative in a biocompatible medium to obtain a solution C; and mixing the solution A, the solution B and the solution C with certain concentrations for a certain time, and performing illumination under a photoinitiator for a certain time to obtain the dynamic-covalent hybrid cross-linked hydrogel material. Compared with single dynamic bond crosslinking or covalent bond crosslinking, the prepared hydrogel material has machinability and mechanical stability; the hydrogel material has plasticity, shear thinning, self-repairing property and the like in the early stage of crosslinking; enough mechanical strength and long-term stability are realized in the later stage of crosslinking.

The invention provides a metal matrix composite microstructure strengthening simulation method and system, and relates to the technical field of composite mechanical property simulation, and the method comprises the following steps: establishing a polycrystalline aluminum matrix atomic model and a spherical silicon nitride particle strengthening phase atomic model unit; embedding the spherical silicon nitride particles into the polycrystalline aluminum matrix according to the target embedding position coordinates, and integrating to generate an atomic scale structure model; according to the method, an embedded atom potential function is adopted to describe interaction among atoms in a polycrystalline aluminum matrix, a Tersoft potential function is adopted to describe covalent bond interaction among atoms in spherical silicon nitride particles, and a Lennard-Jones potential function is adopted to describe interaction among heteroatoms at a Si3N4 / Al interface; based on the interaction potential between atoms, molecular dynamics simulation is adopted for conducting uniaxial stretching simulation on the atomic scale structure model, mechanical property parameters of the particle reinforced metal matrix composite are obtained through calculation, and a visualization method is combined for analyzing the microcosmic strengthening mechanism of the particle reinforced metal matrix composite.

The invention discloses low-migration UV ink-jet ink and a preparation method thereof, and belongs to the technical field of novel ink. Comprising the following components in parts by mass: 10-15 parts of a dynamic cross-linked polyurethane acrylate oligomer, 5-8 parts of an epoxy silicone resin oligomer, 2-3 parts of modified silicon dioxide, 4-5 parts of a photoinitiator, 15-20 parts of sorbic acid modified color paste, 1-2 parts of nano cerium oxide and 0.5-1 part of an antioxidant. The molecular chain of the dynamic cross-linked polyurethane acrylate oligomer prepared by the invention contains an active group capable of forming a cross-linked structure and a dynamic covalent bond. The groups and bonds promote molecular chain crosslinking when the ink is cured, a three-dimensional network is formed, and the molecular crosslinking density is improved. Through interaction of palmitic acid modified silicon dioxide and oligomer, the palmitic acid modified silicon dioxide is uniformly dispersed in a matrix and interferes molecular chain movement during curing, so that the crosslinking density is further improved, an ink film layer is more compact and firmer, the wear resistance and the scratch resistance are improved, and the tinting strength and the stability are indirectly enhanced.

The embodiment of the invention discloses an epoxy molding compound, an epoxy molding film and an electronic component, the epoxy molding compound comprises epoxy resin and a zeolite imidazole framework material, and the zeolite imidazole framework material comprises imidazole ligands and metal ions. The zeolite imidazole framework material is used as a curing agent and a nano reinforced phase, imidazole groups on the surface of the zeolite imidazole framework material can be subjected to a ring-opening reaction with epoxy resin to form covalent bonds, the zeolite imidazole framework material can induce the epoxy resin to generate a microcrack deflection mechanism, and the zeolite imidazole framework material can promote curing of the epoxy resin, so that the epoxy resin is cured, and the curing effect is improved. Therefore, the thermal expansion coefficient of the epoxy molding compound is reduced, the fracture toughness of the epoxy resin is improved, and the thermal stability of the epoxy molding compound is improved.

The invention discloses an MXene-based coating with a near-infrared light induction interaction effect and a preparation method of the MXene-based coating, and relates to the technical field of coatings. The preparation method comprises the following steps: a nano microcapsule and MXene powder are subjected to in-situ growth to form a composite dispersion liquid, the nano microcapsule is of a core-shell structure, a shell layer material is selected from at least one of polyaniline, polyurea, polyurethane, polyacrylate and silicon dioxide, a core contains a functional substance, and the surface of the core contains a porous material. The functional substances are selected from at least two of a corrosion inhibitor, a fluorescent indicator and a lubricant; adding a thermal reversible coating containing dynamic covalent bonds and a curing agent into the composite dispersion liquid, and uniformly mixing to form a homogeneous coating; and spraying the homogeneous coating on the surface of a base material, and curing to obtain the coating. The coating is high in mechanical strength, has a near-infrared light triggered self-repairing function, is high in self-repairing rate, and can realize multiple functions such as fluorescence labeling, corrosion early warning and lubrication coordinated regulation and control.

The invention relates to the technical field of biology, in particular to a multivalent pneumococcal polysaccharide-protein conjugate vaccine for preventing pneumococcal infection and respiratory syncytial virus infection as well as a preparation method and application of the multivalent pneumococcal polysaccharide-protein conjugate vaccine. According to the multivalent pneumococcal polysaccharide-protein conjugate vaccine disclosed by the invention, carrier protein is RSV recombinant protein with immunogenicity; the pneumococcal polysaccharide is connected with the RSV recombinant protein through a covalent bond; the RSV recombinant protein is selected from Pre-F protein, and the amino acid sequence of the RSV recombinant protein is shown as SEQ ID NO: 2 or SEQ ID NO: 3. The conjugate vaccine provided by the invention is an innovative vaccine, two common diseases, namely pneumonia and respiratory syncytial virus infection, can be simultaneously prevented by using one vaccine product, and the number of vaccination times of the vaccine is greatly reduced. According to the invention, the carrier protein in the conjugate vaccine is subjected to mutation modification, so that the carrier protein can maintain structural stability and antigen cluster function in different environments.

The invention belongs to the field of olefin polymers, and relates to a reversible cross-linked polyolefin elastomer and a preparation method thereof. The reversible cross-linked polyolefin elastomer is a reversible cross-linked polyolefin elastomer in which a cross-linked network is formed through three non-covalent bonds, namely hydrogen bonds, ionic bonds and coordinate bonds, and the hydrogen bonds and the cross-linked bonds account for 0.1-85% by taking the sum of the three non-covalent bonds, namely the hydrogen bonds, the ionic bonds and the coordinate bonds as 100%; the ionic crosslinking bond accounts for 0.5-90%; and the coordination crosslinking bond accounts for 9-99%. Compared with a reversible cross-linked polyolefin elastomer in the prior art, the reversible cross-linked polyolefin elastomer prepared by the invention contains hydrogen bonds, ionic bonds and coordinate bonds at the same time, and a synergistic effect is generated through combination of reversible cross-linked interaction of the coordinate bonds, the hydrogen bonds and the ionic bonds; therefore, the material has excellent physical and mechanical properties and also has recoverability and self-repairability.

The invention discloses a silane cross-linked polyolefin halogen-free flame-retardant cable material and a low-energy-consumption preparation method thereof.The preparation method comprises the steps that EVA / EEA serves as a matrix, silane groups are covalently connected to a polyolefin molecular chain through a free radical grafting reaction, and a grafting material containing an active silane side group is prepared; meanwhile, vinyl isocyanate is adopted to chemically modify hydroxyl on the surface of magnesium hydroxide, vinyl is grafted to the surfaces of particles, the polarity of the particles is reduced, and the dispersity of the particles is enhanced; then carrying out melt blending on the grafted material and modified magnesium hydroxide, constructing an interface bridge by using an anhydride group, and shortening the two-phase distance; finally, through room-temperature natural cross-linking and warm water auxiliary cross-linking, silane groups are promoted to be hydrolyzed into silanol, the silanol is condensed to form a-Si-O-Si-three-dimensional network, meanwhile, vinyl on the surface of magnesium hydroxide and a polyolefin matrix are subjected to free radical copolymerization, and a covalent bond interface layer is formed between inorganic particles and an organic matrix. According to the method, the synergistic improvement of high crosslinking degree, strong stretchability and excellent flame retardance of the cable material is realized through molecular-level interface regulation and cross-linking network optimization.

The invention discloses an interface covalently bonded core-shell structure boron nitride polypropylene composite dielectric material and a method. The interface covalently bonded core-shell structure boron nitride polypropylene composite dielectric material comprises a maleic anhydride grafted polypropylene matrix and a core-shell structure filler dispersed in the maleic anhydride grafted polypropylene matrix, the core-shell structure filler comprises hydroxylated boron nitride nanoparticles covalently grafted on a polymer shell layer on the surface of the core-shell structure filler; the polymer shell layer is polyglycidyl methacrylate; the epoxy group of the polymer shell layer reacts with the anhydride group of the maleic anhydride grafted polypropylene matrix to form a covalent bond. The invention has the characteristics of strong interface bonding force, uniform filler dispersion, and excellent comprehensive electrical properties and processability.

The invention discloses an immobilized organic base catalyst and a preparation method and application thereof, the immobilized organic base catalyst comprises functionalized activated carbon, the functionalized activated carbon has a Bronsted base site comprising an organic Bronsted base molecular structure, the organic Bronsted alkali molecular structure is connected to the surface of the functionalized activated carbon through a covalent bond. The immobilized organic base catalyst is a heterogeneous active carbon-based immobilized organic # imgabs0 # base catalyst, and has the advantages of low preparation cost, high reaction activity, good stability and the like.

The invention discloses a self-repairing nylon elastomer material as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, polymerizing a nylon monomer in the presence of an amine end-capping reagent to prepare a double-amino-terminated nylon hard segment; s2, adding the double-amino-terminated nylon hard segment, the double-carboxyl-terminated polyether and / or polyester soft segment and a disulfide bond-containing chain extender into a reactor, adjusting the proportion of the raw materials, and polymerizing under an optional auxiliary A to obtain a double-amino-terminated pre-polymerized nylon elastomer; and S3, adding the double-amino-terminated pre-polymerized nylon elastomer and a dialdehyde chain extender into the reactor, and carrying out a reaction in the presence of an optional auxiliary agent B to obtain the self-repairing nylon elastomer material. According to the self-repairing nylon elastomer material provided by the invention, the nylon elastomer can be self-repaired in various environments through the synergistic effect of various dynamic covalent bonds, and the polymerization efficiency is remarkably improved.

The invention provides a preparation method of a self-repairing resin-based composite material based on dynamic bonds. The self-repairing epoxy resin comprises one covalent dynamic bond of a Diels-Alder bond, a disulfide bond or a borate bond, and the preparation method of the self-repairing epoxy resin comprises the following steps: heating epoxy resin to a molten state, adding a curing agent component while stirring, and carrying out a prepolymerization reaction to obtain a prepolymer; the curing agent comprises a rigid diamine curing agent, a dynamic diamine monomer and a flexible chain segment regulator, and the dynamic diamine monomer contains a dynamic covalent bond; and carrying out curing molding on the prepolymer to obtain the self-repairing epoxy resin. And impregnating reinforced fibers or fabrics thereof with the prepared prepolymer, and heating and curing to obtain the self-repairing resin-based composite material. The invention provides a chemical molecule design, dynamic reversible chemical bonds are introduced into a resin matrix, and by constructing the dynamic bonds, the composite material has high performance of a traditional composite material and also has life-like self-healing ability.

The invention relates to the technical field of batteries, and particularly discloses a current collector, a method for preparing the current collector, a pole piece, a lithium ion battery and a power utilization device.The current collector comprises a base material and a conductive coating arranged on at least one side of the base material, and physical crosslinking points are evenly distributed in the conductive coating; the physical cross-linking points are non-covalent bond connecting points and comprise coordinate bonds between the binder and metal ions and / or hydrogen bonds between the binder and the polyhydroxy compound. The physical cross-linking points can effectively improve the adaptability of the conductive coating to the expansion and shrinkage stress of the active material layer in the long-term circulation process, the physical cross-linking points can be self-generated again after being damaged, the cross-linking structure improves the adhesion strength of the conductive coating to the current collector, meanwhile, the conductive coating has excellent fatigue resistance, and the service life of the conductive coating is prolonged. After long-term circulation, the high cohesiveness is still kept, and the phenomena of interface separation and active substance powder falling are not prone to occurring.

The invention relates to the technical field of photovoltaic module frames, in particular to a self-cleaning weather-proof aluminum alloy photovoltaic module frame and a preparation method thereof, and aims to improve the self-cleaning capacity of the photovoltaic module frame, a layer of self-cleaning coating is prepared on the basis of an aluminum alloy frame body. The boric acid ester chain extender containing the fluorine element and the fluorine-containing polyol are added, and the fluorine element has extremely strong electronegativity, so that the water resistance of the resin can be effectively improved, the surface energy of the material is reduced, the surface friction is reduced, the friction resistance is improved, the adsorption of dust on the surface of a metal frame can be reduced, and the material is kept clean for a long time; a reversible covalent bond boric acid ester bond is further introduced into the boric acid ester chain extender, so that the purpose of self-repairing is achieved, hydrophobic nano-silica is further added into the coating, the friction resistance and hydrophobic capacity of the aluminum alloy photovoltaic module frame are further improved, and the service life of the aluminum alloy photovoltaic module frame is prolonged. And the durability of the material exposed in an external atmospheric environment is improved.

The invention discloses a silicon negative electrode binder as well as a preparation method and application thereof. The silicon negative electrode binder is a graft copolymer with a comb-shaped structure; the grafted copolymer comprises a polyurethane chain segment forming a main chain of the comb-shaped structure, a polyacrylic acid chain segment serving as a branch chain and connected to the main chain through a covalent bond, and a fluorine-containing chain segment. According to the preparation method, a graft copolymerization method is adopted, the preparation method is carried out in a water-based system, the silicon negative electrode binder with hardness and softness is obtained, and the silicon negative electrode binder is applied to a lithium battery through the synergistic effect of mechanical property, interface stability and electrochemical performance. And a solution of a key material is provided for a high-capacity and long-cycle lithium battery which takes an active material with high silicon content as a negative electrode.

The invention belongs to the technical field of ocean engineering materials, and particularly relates to an underwater concrete self-repairing material containing dynamic disulfide bonds as well as a preparation method and application of the underwater concrete self-repairing material. The underwater concrete self-repairing material containing the dynamic disulfide bond comprises the following components in parts by weight: 50-70 parts of a hardening agent which is an epoxy prepolymer containing the dynamic disulfide bond; the water repellent agent comprises 20-35 parts of a curing agent and 1-3 parts of an accelerant. According to the underwater concrete self-repairing material containing the dynamic disulfide bonds, the epoxy prepolymer containing the dynamic disulfide bonds serves as a main network, the epoxy prepolymer is broken under the action of external force, and then new covalent bonds can be formed through spontaneous recombination to repair microcracks.

The invention relates to the field of high polymer materials, and discloses a high-wear-resistance elastomer sole material and a preparation method thereof.The material comprises an elastomer matrix and surface-modified boron nitride nanosheets; the elastomer matrix comprises a first dynamic network and a second dynamic network which are formed through crosslinking of dynamic covalent bonds, and the first dynamic network and the second dynamic network are based on different types of dynamic covalent bonds and have different dissociation activation energy barriers or external stimulus response conditions. The surface-modified boron nitride nanosheet and the second dynamic network form a selective interface enhancement effect; the preparation method comprises the steps of polymer functionalization, nanosheet surface modification, melt blending reaction net forming, forming and the like. The obtained elastomer sole material not only has excellent wear resistance and mechanical properties, but also can realize self-repair of graded response aiming at damages of different degrees, and the service life of the material is remarkably prolonged.

The invention belongs to the technical field of batteries, and particularly relates to a negative electrode material, a secondary battery and electric equipment. The second coating layer with the porous carbon material in the negative electrode material provides a sufficient buffer space for volume expansion of silicon, so that cracks and pulverization of the negative electrode material are effectively reduced, and the structural integrity of the negative electrode material is further ensured. And meanwhile, the solid electrolyte arranged in the second coating layer can maintain the smoothness of an ion transmission path in the silicon expansion process, so that the rate capability and the quick charge performance of the battery are ensured. Besides, a third coating layer (SEI film) formed by the ionic liquid has good ionic conductivity, and dynamic covalent bonds existing in some ionic liquids can be fractured and recombined under the action of external stress, so that a self-repairing function is realized. Therefore, when cracks are generated on the surface of the negative electrode material due to volume expansion, the third coating layer can quickly repair the cracks, prevent electrolyte permeation and lithium dendrite growth and inhibit side reactions.

The invention belongs to the technical field of adhesives, and particularly relates to a preparation method of a polysaccharide-based reversible bonding adhesive for constructing a dynamic covalent bond network. The preparation method comprises the following steps: by taking lipoic acid and sodium alginate as reactants and ferric chloride as a cross-linking agent, carrying out cross-linking reaction under a stirring condition to obtain a lipoic acid adhesive, namely the polysaccharide-based reversible bonding adhesive. According to the invention, renewable biomass resources such as sodium alginate, hyaluronic acid, chitosan and the like are used as main raw materials, so that the adhesive is expected to replace a traditional synthetic adhesive depending on a petroleum base, accords with a sustainable development strategy, contributes to reducing consumption of fossil resources, avoids release of toxic substances such as formaldehyde and the like in the synthesis and use processes, and has a good application prospect. And the method is more environment-friendly. The bio-based polysaccharide raw material has good biocompatibility and degradability, and an ideal base material is provided for developing a green and safe biomedical adhesive.

The invention discloses a reprocessable solid-solid phase change material based on dynamic borate bonds and a preparation method of the reprocessable solid-solid phase change material. Based on the mechanism that boric acid ester is subjected to ester exchange during thermal stimulation, a dynamic cross-linking agent containing boric acid ester is adopted for cross-linking a polyurethane prepolymer, polyethylene glycol is cross-linked through chemical bonds, the tensile strength and the elongation at break of the phase change material are improved, and the problem that the phase change material is prone to leakage in the phase change process is solved; besides, borate bonds belong to associated dynamic covalent bonds and can keep the crosslinking density of the material unchanged when ester exchange occurs under thermal stimulation, so that the thermal stability of the material is relatively good; the solid-solid phase change material disclosed by the invention is excellent in mechanical property, has a relatively high enthalpy value, can be reprocessed, and has an application prospect in the fields of thermal management, energy storage, infrared stealth and the like.

The invention relates to the technical field of lithium ion battery negative electrode materials, in particular to a coating modification method of a negative electrode material, the negative electrode material and application of the negative electrode material, and the negative electrode material sequentially comprises a silicon core, a gradient interface layer, a self-repairing elastic layer and a hierarchical porous carbon skeleton from inside to outside; the gradient interface layer coats the surface of the silicon core and sequentially comprises an amino silane coupling agent modification layer and a conductive polymer layer from inside to outside; the self-repairing elastic layer covers the outer side of the gradient interface layer and comprises a dynamic covalent bond cross-linked network; the hierarchical porous carbon skeleton coats the outer side of the self-repairing elastic layer, a strongly-combined gradient interface layer is firstly constructed on a silicon core through hydroxylation, amino silane coupling and conducting polymer in-situ polymerization, then a reversible cross-linked network is formed outside the gradient interface layer based on Diels-Alder dynamic covalent bonds, and in-situ crack repairing is achieved. And finally, biomass carbon and CVD carbon nanotubes are compounded, and a micropore / mesopore synergistic conductive buffer structure is formed outside the reversible cross-linked network, so that the cycling stability of the battery is improved.

The invention discloses a colored photovoltaic module which comprises a transparent colored glaze panel, a transparent bonding layer A, a battery layer, a bonding layer B and a back plate which are sequentially packaged in a stacked mode. The transparent colored glaze panel comprises a glass substrate, a transparent colored coating covering the outer side surface of the glass substrate, and a transparent glaze layer covering the outer side surface of the transparent colored coating; the transparent glaze layer is combined with the transparent colored coating through a covalent bond; the main component of the transparent glaze layer is silicon dioxide. The transparent colored coating of the colored photovoltaic module is positioned on the outer surface of the glass panel of the photovoltaic module, so that the defect of glass texture of a traditional photovoltaic module serving as a building material product is overcome; a transparent glaze layer with silicon dioxide as a main component is further arranged outside the transparent colored coating to serve as a protective layer, the adhesion fastness is high, the excellent performance of high hardness, high transparency, super weather resistance, acid and alkali resistance, scratch resistance and stain resistance is achieved, and the colored coating is effectively protected against color fading, falling off and external erosion such as acid rain, ultraviolet and sand wind.

The invention discloses an interfacial film for an ion battery, a preparation method of the interfacial film, the ion battery and an electric device, the interfacial film for the ion battery is finally obtained by performing multi-step modification on a carbon nano tube and reacting the carbon nano tube with a prepolymer solution, so that the interfacial film can effectively reduce the interfacial impedance and promote ion transmission, and the performance of the ion battery is improved. The modified carbon nanotubes are combined with polyimide through the action of covalent bonds, so that the mechanical property of an interfacial film is improved, dendritic crystal puncture can be physically inhibited through the high mechanical strength of the interfacial film, and the cycling stability and the rate capability of the battery are improved; and meanwhile, the interfacial film can inhibit side reaction between the negative electrode and electrolyte, reduce interface impedance and promote ion transmission, so that the overall electrochemical performance of the battery is improved.

The invention relates to the technical field of quantum information devices, and particularly discloses a fullerene Y3N-C80-based probability bit device and a preparation method thereof.The probability bit device comprises fullerene Y3N-C80 molecules, graphene point electrodes, a metal electrode and a substrate, the fullerene Y3N-C80 molecules are connected to the two graphene point electrodes, the graphene point electrodes are connected to the metal electrode, and the metal electrode is connected to the substrate. The graphene point electrode and the metal electrode are located on the substrate, and the fullerene Y3NatC80 molecules are connected with the graphene point electrode through amide covalent bonds. According to the invention, the electric dipole moment is driven to overturn under the condition that different transverse source-drain bias voltages are applied to the probability bit device, so that the probability bit device can present different conductive states, the time proportion of the conductive states can be adjusted according to the magnitude of the applied transverse source-drain bias voltages, and the purpose of regulating and controlling the single-molecule probability bit device is achieved.

A vessel including a thermoplastic wall enclosing a lumen is disclosed. The wall supports an SiOx composite barrier coating or layer, for which x is from 1.8 to 2.4, between the wall and the lumen. High Resolution X-ray Photoelectron Spectroscopy (XPS) shows the presence of an interface between the composite barrier coating or layer and the wall or substrate. In one aspect, the interface has at least 1 mol. % O3—Si—C covalent bonding, as a proportion of the O3—Si—C covalent bonding plus SiO4 bonding. In another aspect, the interface has an Si 2p chemical shift to lower binding energy (eV), compared to the binding energy of SiO4 bonding. The result is a tightly adherent composite barrier coating or layer having a high degree of adhesion to the substrate under practical use conditions. Methods of applying the composite barrier coating or layer are also disclosed.

The invention relates to the technical field of silicon dioxide surface modification, in particular to a silicon dioxide hollow sphere with an MOF composite layer, a manufacturing method and a dielectric loss prediction method. The silicon dioxide hollow sphere comprises a hollow spherical structure formed by silicon dioxide, an amino silane layer grafted on the surface of an inner core layer through a covalent bond, a ZIF-8 crystal layer growing in situ by taking amino as a nucleation site, and thiol groups distributed on the outer surface of an MOF crystal. According to the silicon dioxide hollow sphere with the MOF composite layer, the manufacturing method and the dielectric loss prediction method, the silicon dioxide hollow sphere with the MOF composite layer has good compatibility and stability in an LCP matrix, the dielectric loss is small, and the performance of a high-frequency FPC is effectively improved.

The present invention relates to the nanoparticles (NP) of the invention, compositions thereof and their use as therapeutic agents, in particular in the field of oncology and / or as imaging agents. The NPs consist of first nanoparticles of at least one high-Z metal oxide material, to which smaller second nanoparticles are covalently bonded at the surface of the first nanoparticles. The second nanoparticles consist of a) at least one noble metal or at least one metal oxide, metal sulfide, metal selenide or metal sulfide / selenide as a Fenton or Fenton-like reaction catalyst. The NPs of the invention produce a surprising therapeutic effect when exposed to ionizing radiation such as X-rays, gamma-rays, protons, neutrons, radioisotopes and / or electron beams. Therefore, these NPs can be used as radiosensitizers in the field of oncology. These nanoparticles can also be used as contrast agents.