18results about How to "Low modulus" patented technology

The utility model provides a panel supporting structure and a display device.The panel supporting structure is used for being arranged on the non-display side of a display panel so as to support the display panel; the panel supporting structure comprises a supporting back plate which is provided with a bendable area, and the bendable area comprises an opening area and a non-opening area; the covering film at least covers one side, deviating from the display panel, of the bendable area; wherein at least one of the supporting back plate and the covering film is internally provided with a shear thickening material layer, and at least part of the shear thickening material layer is arranged at the position corresponding to the opening area. According to the panel supporting structure and the display device, the mechanical strength of the display device can be improved.

The invention discloses a piezoelectric film with bionic textures and a preparation method and application thereof, the piezoelectric film is formed by directionally stacking and depositing fibers with core-shell structures, the piezoelectric film has a gully-bulge alternating bionic morphology imitating human skin surface textures, and the aperture of the piezoelectric film is gradually increased from an attachment surface in the thickness direction; the fiber having the core-shell structure comprises: a core layer having a porous structure and containing modified molybdenum disulfide and polyester; the shell layer wraps the core layer, and the shell layer contains collagen; the piezoelectric film comprises a sensing unit area and a flexible connection area, the collagen crosslinking degree of the sensing unit area is larger than 75%, and the collagen crosslinking degree of the flexible connection area is 40%-55%. Under the synergistic effect of materials and structures, the piezoelectric film not only has a high piezoelectric constant, but also shows excellent mechanical properties, air permeability and moisture penetrability, and has wide application prospects in the fields of electronic skin, health monitoring and the like.

This invention discloses a five-layer electrodeposited high-sealing corrugated pipe based on ultrasound assistance and its preparation method, belonging to the technical field of metal corrugated pipe manufacturing. It aims to solve the problem that in multi-layer electrodeposited corrugated pipes, it is difficult to effectively coordinate current density, surface quality, and interfacial bonding strength, leading to insufficient densification of the deposited layer, unstable interlayer bonding, poor wall thickness uniformity, and failure to meet airtightness standards, ultimately resulting in poor overall performance stability. This invention includes a five-layer composite structure in which the pipe wall is composed of alternating nickel-cobalt alloy and copper layers. Each layer of the five-layer composite structure undergoes ultrasonic vibration treatment during deposition. The corrugated pipe prepared by this invention has a uniform and dense deposited layer with good interlayer bonding. The five-layer alternating deposition layer composite structure not only achieves uniform stress transmission and dispersion, effectively delaying crack propagation and interfacial penetration, but also improves the uniformity of wall thickness distribution, enabling the corrugated pipe to exhibit higher structural stability and long-term reliability in a sealed environment.

The present application relates to a kind of high ductility silicon hydrogel, which is prepared by polymerization reaction of polymerizable composition containing thiol with functionality greater than or equal to 3, and the elongation of the high ductility silicon hydrogel is 285%-439%.The present application also relates to a kind of high ductility contact lens and its preparation method.By adding thiol with functionality greater than or equal to 3 as crosslinking agent in the formula of silicon hydrogel, the formed silicon hydrogel polymer network is more regular, more full and more stretchy, so that the prepared contact lens has good ductility, and the contact lens has high water content and low modulus.In addition, compared with the contact lens formed without adding thiol with functionality greater than or equal to 3, the size change of the contact lens formed after adding thiol with functionality greater than or equal to 3 is less than 5%.

The utility model belongs to the technical field of self-adhesive labels, in particular to a flexible self-adhesive label suitable for curved surface adhesion, which comprises an outer layer, and a printing layer and a protective layer are sequentially coated on the upper surface of the outer layer from bottom to top. According to the flexible self-adhesive label suitable for curved surface pasting, the flexible self-adhesive label suitable for curved surface pasting is arranged and can adapt to curved surface pasting, the middle layer is made of silicon rubber, and controllable and local deformation (such as groove widening / deepening) can be generated when the label is subjected to bending or stretching stress through the stress release groove microstructure; therefore, stress is efficiently absorbed and dissipated, failure caused by the fact that the stress is transmitted to the edge of the label or the interface of the bonding layer is prevented, the stressed stress can be dispersed through the wave grooves, and the situation that the middle layer of the label is broken after being bent multiple times due to stress concentration is avoided.

This invention relates to the field of advanced semiconductor packaging materials technology, and particularly to a low-modulus, high-strength, and low-moisture-absorbing epoxy resin composition and its preparation method. By weight, the epoxy resin composition comprises: 20-60 parts of MAR-type epoxy resin base material one, 15-40 parts of modified masterbatch, 0.01-5 parts of a first catalyst, 30-700 parts of silicon powder, 0-30 parts of additives, and 25-60 parts of curing agent; the modified masterbatch is prepared from: MAR-type epoxy resin base material two, a second catalyst, and HTPB; the curing agent is MAR-type phenolic resin. This invention introduces HTPB into the MAR-type resin system to create a synergistic effect, resulting in a packaging material with low modulus, high strength, and low moisture absorption. The obtained composition can achieve a moisture sensitivity level of MSL1, meeting the high reliability packaging requirements of DFN / QFN and other packaging forms.

The invention belongs to the technical field of adhesives, and particularly relates to a low-modulus high-thermal-conductivity acrylate-based chip mounting adhesive and a preparation method thereof.The low-modulus high-thermal-conductivity acrylate-based chip mounting adhesive is prepared by taking acrylate as a base material and taking modified diamond and the like as additives through mixing, the flexible polymer chain segment structure contains a large amount of hydroxyl substituent groups generated by ring-opening reaction, so that the flexible polymer chain segment structure can participate in the subsequent curing process of the acrylate mounting adhesive, and the diamond and the acrylate mounting adhesive can generate a good interface effect, so that a dispersing agent is more uniformly added into acrylate, and the purposes of adding a small amount of the dispersing agent and adding a small amount of the dispersing agent are achieved. In addition, in the curing process, the flexible macromolecular chain segment is introduced into the acrylate structure, and the modulus of the mounting adhesive can be effectively reduced by utilizing the flexibility of the flexible macromolecular chain segment.

The application discloses an antibacterial bio-based polyamide elastomer and a preparation method thereof. The preparation method comprises the following steps: preparing a polyamide prepolymer containing a tertiary amine structure through ring-opening polymerization reaction of caprolactam, N-diethyl-aminocaprolactam and sebacic acid, then reacting with polytetramethylene ether glycol to form a polyamide-polyether block copolymer elastomer, and further modifying the polyamide-polyether block copolymer elastomer through reaction with a halogenated hydrocarbon to realize quaternary ammonium modification, so that the quaternary ammonium salt antibacterial group is stably introduced into the polymer molecular structure in a covalent manner. The bio-based polyamide elastomer prepared by the application has excellent elastic properties and persistent and stable quaternary ammonium antibacterial properties, the antibacterial components are not easy to migrate and lose, the preparation process is simple and controllable, is suitable for the field of functional materials, and has a good application prospect.

The invention relates to an attached photoelectric health monitoring device and method based on a photoelectric detector, and the device comprises an ultrathin flexible substrate which is made of Parylene-C; the S-shaped interconnection electrode is formed on the ultrathin flexible substrate; the perovskite photoelectric detection layer with the two-dimensional Ruddlesden-Popper structure is regionally deposited on the snakelike interconnected electrode, and the general formula of the perovskite photoelectric detection layer is (PEA) 2 (MA) < n > < 1 > Pb < n > I < 3 > < n > < 1 >; the LED light source is arranged on the ultrathin flexible substrate, and the LED light source and the two-dimensional Ruddlesden-Popper structure perovskite photoelectric detection layer are located on the same plane to form a reflective detection mode; and the packaging layer covers the two-dimensional Ruddlesden-Popper structure perovskite photoelectric detection layer and the LED light source, the material of the packaging layer is Parylene-C, and the packaging layer and the ultrathin flexible substrate jointly form a symmetrical double-layer packaging structure. Compared with the prior art, the invention has the advantages of high fitness and comfort, high sensitivity, quick response, high environmental stability and mechanical durability, low power consumption, high signal-to-noise ratio, high signal quality and detection precision and the like.

The invention relates to the technical field of manufacturing of magnetic materials and flexible electronic devices, in particular to a flexible magnetic sheet, a preparation method of the flexible magnetic sheet, a magnetic attraction assembly and wearable equipment. The preparation method of the flexible magnetic sheet comprises the following steps: mixing anisotropic magnetic powder treated by a coupling agent with liquid silicone rubber and a catalyst to form slurry, then carrying out hot press molding by a press with a pressing orientation device to enable the magnetic powder to be directionally arranged, and finally, carrying out post-treatment to obtain the flexible magnetic sheet. According to the method, the magnetic sheet with high residual magnetism, high attraction, extremely low modulus and high flexibility is successfully prepared through cooperation of magnetic powder type selection and orientation processes and optimization of the content of key components, and the problem that magnetic performance and elasticity of a traditional magnetic sheet are difficult to consider at the same time is solved.

The application discloses a kind of low modulus silicone rubber based on topological network regulation and its preparation method and application, belong to room temperature vulcanized silicone rubber technical field.It includes component A, component B and component C;The A component, by weight fraction, includes tetraethenyl terminated polysiloxane 100 parts, white carbon black 10-50 parts, platinum catalyst 0.01-0.5 parts;The B component, by weight fraction, includes end hydrogen silicone oil 3-50 parts, tetraethenyl terminated polysiloxane 50-97 parts, white carbon black 10-50 parts, inhibitor 0.01-0.5 parts;The C component, by weight fraction, includes hydrogen-containing silicone resin 0-30 parts.The application controls the topological network of silicone rubber, reduces its modulus at the same time, makes it have better mechanical properties and damping performance, realizes the synergistic optimization of comprehensive performance.

The application provides a variable dihedral angle inflatable folding wing based on an electric response shape memory polymer and a control method, which comprises a wing shell, a control system and a pump; the wing shell comprises a framework, an elastic body electrothermal layer and a flexible skin, the framework comprises a wing rib and a spar, and the spar is provided with an electric response shape memory polymer; an upper air bag and a lower air bag which are not conductive to each other are symmetrically installed inside the wing contour between adjacent wing ribs; adjacent upper air bags are connected to each other, and adjacent lower air bags are connected to each other; the upper air bag and the lower air bag at one end of the wing contour are connected with the pump respectively; the control system controls the electric response shape memory polymer to conduct electricity, so that the spar generates thermal deformation; and the control system controls the pump to make the upper air bag or the lower air bag negative pressure, so as to change the upper or lower dihedral angle of the wing. The application can realize variable dihedral angle under different flight requirements.

The invention discloses a preparation method of a light-weight low-tensile high-modulus polyester industrial yarn, which comprises the following steps of: tackifying a high-viscosity polyester chip by a solid-phase tackifying device, melting and extruding by a screw extruder, entering a spinning manifold, distributing the melt in the spinning manifold by a spinning component, and pressing into a porous spinneret plate to form a tow, sequentially cooling, oiling, drafting, heat setting and winding to obtain the low-stretch high-modulus polyester industrial yarn. The intrinsic viscosity of the high-viscosity polyester chip is 1.10-1.16 dL / g, the melting point is 257-265 DEG C, the specification of the chip is 2.35 + / -0.50 g / 100, the number of holes of a spinneret plate is 280f, the hole pitch of the spinneret plate is 0.96 cm, and the hole diameter is 0.8-0.99 mm. The industrial yarn produced by the method shows excellent characteristics of light weight, low stretching and high modulus, and completely meets the requirements of high-end rubber framework materials such as radial tires and the like on high-performance fibers.

The invention discloses an OCA (Optical Clear Adhesive) full-lamination optical adhesive and a preparation method thereof, belongs to the technical field of optical adhesives, and aims to provide an optical adhesive with high optical performance, excellent flexibility and self-repairing capability. The optical cement is prepared by single-sided ultraviolet light gradient initiation curing of a prepolymer system consisting of a soft monomer, a hard monomer, a functional monomer, a dynamic cross-linking agent, a photoinitiator, an ultraviolet light absorber and a silane coupling agent. Through a light intensity depth attenuation effect caused by competitive light absorption of the ultraviolet light absorber, a gradient network structure of which the crosslinking density is continuously decreased progressively along the thickness direction is formed in situ in a single adhesive layer; a disulfide bond is introduced into a polymer network through a dynamic cross-linking agent, so that the material is endowed with self-repairing and stress relaxation functions.

This invention relates to a salt spray resistant and anti-aging curing coating and its preparation method, belonging to the field of coating technology. The coating includes modified epoxy resin, ternary nanocomposite filler, composite light stabilizer, hydrophobic eutectic solvent, polysiloxane-modified aromatic amine curing agent, and bio-based polyurethane curing agent. The modified epoxy resin is prepared by reacting bisphenol F epoxy resin, KH-560 silane coupling agent, and tetrabutylammonium bromide, followed by the addition of bi-terminated epoxy silicone oil, 3,3'-dithiodipropionic acid, and p-toluenesulfonic acid, and then by adding pentaerythritol phosphate and antioxidant 1010. The polysiloxane-modified aromatic amine curing agent is prepared by reacting m-phenylenediamine as a matrix, KH-560 silane coupling agent, diphenylsilanediol, and dibutyltin dilaurate. The bio-based polyurethane curing agent is prepared by reacting castor oil-modified polyol, isophorone diisocyanate, dibutyltin dilaurate, dimethylolpropionic acid, and trimethylolpropane.

This invention relates to the field of cable technology, specifically to a processing technology for high-temperature resistant, ultra-flexible motor lead wires. The process involves preparing two types of hexagonal boron nitride fillers with different surface properties through hydroxylation and silane modification, and applying them in separate layers of a three-layer insulating compound. Combined with a polysiloxane alkyl body with increasing phenyl content from the inside out, flexible single-end segments on the inner side, and a differentiated crosslinking agent / inhibitor system, the lead wire is obtained through three-layer co-extrusion and multi-stage temperature-increasing vulcanization. This process solves the problems of decreased flexibility, poor bending reliability, and easy failure of interlayer interfaces caused by high phenyl / high filler content in traditional methods, achieving a balance between high-temperature resistance, ultra-flexibility, and stable electrical performance.

The invention discloses pressureless sintering silver colloid, a preparation method of the silver colloid and a semiconductor device. The pressureless sintering silver colloid comprises the following components in parts by mass: 80-90 parts of silver powder; 0.1 to 15 parts of an epoxy resin composition; 0.1 to 7 parts of a diluent; 0.1-5 parts of a curing agent; 0.01 to 1 part of a curing accelerator; 0.1 to 7 parts of a solvent; 0.1 to 5 parts of a coupling agent; wherein the silver powder comprises large thick sheet powder, submicron ball powder and nano silver powder, and the epoxy resin composition comprises at least one of epoxy resin, high-temperature-resistant resin or toughened resin. The large thick sheet powder, the submicron ball powder and the nano silver powder are compounded to ensure that the pin has low viscosity under the condition of high silver content so as to improve the dispensing workability, the epoxy resin combination is adopted, and the high temperature resistance and the flexibility of the conductive adhesive are balanced through the toughened modified epoxy resin or the high-temperature-resistant resin, so that the high-temperature resistance of the conductive adhesive is improved, and the service life of the conductive adhesive is prolonged. The composite material can resist high temperature, and has low CTE, low modulus and high TST reliability.

This invention discloses a method for preparing a high-conductivity PEDOT:PSS conductive framework, comprising: filtering an aqueous solution of PEDOT:PSS; adding an anionic surfactant to separate the PEDOT:PSS phase and reduce the surface activity of the solution, obtaining a mixed solution; adding the mixed solution and air in a predetermined ratio to a dual-syringe mixing container, mixing and shearing to obtain a PEDOT:PSS foam emulsion; adding the obtained foam emulsion to a specific template and allowing it to slowly solidify; washing the solidified PEDOT:PSS foam with water to remove the surfactant and some PSS; and finally freeze-drying to remove moisture to obtain a high-conductivity PEDOT:PSS conductive framework. The PEDOT:PSS conductive framework prepared by this invention exhibits excellent water / oil stability, higher conductivity, lower framework density, and superior mechanical properties.