44 results about "Pmma polymer" patented technology

The invention relates to a nano composite fiber-reinforced gel polymer electrolyte and a preparation method thereof. Nano composite polymer fibers are grafted with a cross-linked polymer which has good compatibility with an electrolyte liquid, and adsorbs an ionic liquid-base electrolyte liquid to form a gel polymer electrolyte membrane taking the nanometer composite fibers as the framework, wherein the gel polymer electrolyte membrane has the advantages that the high temperature stability is good, and 10<-3> S/cm order of magnitude room temperature ion electric conductivity and the liquid leakage ratio are low. The preparation method mainly sequentially comprises the four steps of dissolving PVDF and PMMA to obtain a spinning liquid, obtaining a nano composite SiO2/PVDF-b-PMMA polymer blend fibrous membrane, obtaining a (SiO2/PVDF-PMMA)-g-PMMA/SiO2 nano composite polymer membrane, and obtaining a nano composite fiber-reinforced gel polymer electrolyte. The preparation method does not need a radiation device to trigger or strong base treatment; the synthesis process is simple; the operation is convenient; the production technology process is short; the energy consumption is low; and the nano composite fiber-reinforced gel polymer electrolyte and the preparation method thereof are especially suitable for a power lithium-ion battery material and preparation thereof.

The invention belongs to a preparation method of a biosensor, and relates to a preparation method of a graphene field-effect transistor biosensor. The preparation method comprises the following steps: (1) preparing a single-layer graphene copper plate; (2) preparing devices on a substrate layer of a sensor; (3) performing directional transfer on graphene; and (4) heating to bake the sensor, removing PMMA (polymethyl methacrylate) with acetone, performing vacuum annealing, and modifying the graphene with probes to obtain the graphene field-effect transistor biosensor. According to the preparation method provided by the invention, large-scale preparation of the biosensor based on CVD (chemical vapor deposition) graphene can be realized, the copper etching time is short, and the preparation method is simple and quick and can greatly lower the manufacturing cost; and in the preparation process, the PMMA polymer is used only once (in the traditional method, the PMMA polymer is used for more times, at least three times), thus greatly improving the surface cleanliness of the graphene, retaining the intrinsic high performance of the graphene and being more beneficial to subsequent probe modification.

The invention discloses a composite lithium ion battery separator and a preparation method therefor. The composite lithium ion battery separator comprises non-woven fabric cloth used as the framework, and a composite film which is formed by a polymethyl methacrylate polymer mixed liquid on the non-woven fabric and equipped with a three-dimensional cross-linking network. The composite lithium ion battery separator adopts the non-woven fabric framework and the polymer-repaired composite structure, so that the power performance of the lithium ion battery is improved, and the safety performance of the lithium ion battery is enhanced; according to the preparation method for the composite lithium ion battery separator, the PMMA is taken as the polymer for dip-coating; a proper amount of cross-linking agent is added to the PMMA solution to trigger polymerization under a proper condition so as to form the three-dimensional cross-linking network, so that a certain framework effect is performed in the PMMA polymer, which is similar to the effect of reinforcing steel bars in reinforced concrete; and therefore, the mechanical strength of the separator is greatly improved, and the influences on the air permeability of the separator, the wettability of the electrolyte, and the like are reduced as well.

A light-conducting component, in particular finished concrete part in the form of a masonry brick, for constructions and building. The component is produced in a casting mold by casting into at least one casting building material and the optical waveguide is made of a light-conducting building material, e.g. PMMA polymer or glass, which is accessible at at least two positions on the outer surface of the light-conducting component for the input of light and output of light. The optical waveguide is configured as a self-supporting 2D or 3D lattice body composed of rods having a thickness/diameter of greater than 1 mm. The self-supporting 2D or 3D lattice body has approximately the same or an only slightly smaller width (W), or length (L), or base dimensions (W, L), or total external dimensions (W, L, H) than the casting mold itself.

The invention relates to an assembly method of a microstructure pressing triple prism made from PMMA polymer material. The method comprises the following steps: welding a flat glass plate on the bottom surface of a PMMA pressing triple prism by an ultrasonic welding technology to enable the bottom surface of the PMMA pressing triple prism to be fixed on the flat glass plate; cutting the flat glass plate fixed on the PMMA pressing triple prism by a diamond cutting machine, wherein a free boundary exceeds the outline of the PMMA pressing triple prism; etching an assembly line on the inner layer of a lens of a common spherical mirror needing to be installed, wherein the assembly line is the same as the contour line of the flat glass plate; aligning a microstructure morphology layer of the PMMA pressing triple prism to the inner layer of the common spherical mirror, and welding the flat glass plate provided with the PMMA pressing triple prism on the assembly line by an ultrasonic welding technology; and carrying out edge polishing treatment.

Disclosed herein is a photocatalytic filter, which includes a plurality of cross-linked polymethyl methacrylate (PMMA)/ionic liquid (IL)/TiO₂ nanocomposite pellets, and a photocatalytic vessel. The plurality of cross-linked PMMA/IL/TiO₂ nanocomposite pellets is placed within the photocatalytic vessel. Each cross-linked PMMA/IL/TiO₂ nanocomposite pellet includes a PMMA polymeric matrix, and a plurality of IL/TiO₂ core-shell microspheres dispersed within the PMMA polymeric matrix. Moreover, each IL/TiO₂ core-shell microsphere includes a core of IL and a shell of TiO₂ nanoparticles.

The invention discloses a bead suspension polymerization method for methyl methacrylate, which comprises a step of mixing an oil phase and an aqueous phase to carry out a suspension polymerization reaction. The oil phase comprises a methyl methacrylate monomer and an oil-soluble radical initiator; the aqueous phase comprises water and at least three suspending agents, namely a cellulose surfactant, a vinyl pyrrolidone polymer nonionic surfactant and an acrylic polymer anionic surfactant. In the method, a polymerization reaction system is stable and easy to control, the polymerization reaction period is shortened, the yield is improved, and the method is low in cost. Meanwhile, the polymethyl methacrylate (PMMA) polymer particles prepared by the method meet the service conditions for manufacturing artificial resin teeth.

The invention provides a strabismus angle measurement device with a hard film pressing triple prism. The strabismus angle measurement device with the hard film pressing triple prism comprises a strabismus angle measurement bar and the hard film pressing triple prism. The hard film pressing triple prism comprises an optical surface microstructure, an assembly groove, a material base and a hard film protective layer, wherein the material base is made of a PMMA polymer material, the light transmittance of the PMMA polymer material reaches 99%, the optical surface microstructure is arranged on the upper surface of the material base, the optical surface microstructure is a Fresnel optical microstructure, the assembly groove surrounds the optical surface microstructure, and the hard film protective layer is arranged on the bottom surface of the material base. The strabismus angle measurement bar comprises a handle and hard film pressing triple prism assembly holes, wherein the handle is located at the end of the strabismus angle measurement bar, supporting rings used for supporting the hard film pressing triple prism are arranged in the hard film pressing triple prism assembly holes, and the hard film protective layer of the hard film pressing triple prism is located on the supporting rings. The strabismus angle measurement device with the hard film pressing triple prism can achieve non-contact measurement and is good in measurement effect.

Peptides are provided that have binding affinity for polymethyl methacrylate (PMMA). The polymethyl methacrylate-binding peptides may be used to prepare peptide-based reagents suitable for use in a variety of applications. The peptide-based reagents may be used to couple benefit agents to a PMMA polymer surface or may be used to couple a benefit agent comprising a PMMA polymer surface to a target surface, such as a body surface.

Peptides are provided that have binding affinity for polymethyl methacrylate (PMMA). The polymethyl methacrylate-binding peptides may be used to prepare peptide-based reagents suitable for use in a variety of applications. The peptide-based reagents may be used to couple benefit agents to a PMMA polymer surface or may be used to couple a benefit agent comprising a PMMA polymer surface to a target surface, such as a body surface.

The invention discloses a preparation method and application of a fluorescent nanofiber film based on a bimetallic organic framework. The fluorescent nanofiber film is prepared by taking the bimetallic organic framework and a PMMA polymer as raw materials and utilizing an electrostatic spinning technology. The purpose of detection is achieved through the quenching amount of the fluorescent signalof the fluorescent nanofiber film. The fluorescent nanofiber film has the unique advantages of high sensitivity, good selectivity, short response time and the like when used for detecting nitro-explosive { (4-NA (p-nitroaniline), TNP (picric acid) } and antibiotic { (NFT nitrofurantoin, NFZ nitrofurazone) } in water.

Peptides are provided that have binding affinity for polymethyl methacrylate (PMMA). The polymethyl methacrylate-binding peptides may be used to prepare peptide-based reagents suitable for use in a variety of applications. The peptide-based reagents may be used to couple benefit agents to a PMMA polymer surface or may be used to couple a benefit agent comprising a PMMA polymer surface to a target surface, such as a body surface.

The invention discloses a preparation method of PMMA (Polymethyl Methacrylate) nano vacant shells with different thicknesses, and relates to SiO2-PMMA nano composite materials with different shell thicknesses, a synthesizing method and regulation of shell thicknesses of vacant PMMA. The preparation method comprises the following steps: preparing spherical nano SiO2 with proper grain size; then, carrying out backflow at 95 DEG C for 12 hours by 3-aminopropyltriethoxysilane (APTES) to modify SiO2 to obtain SiO2-NH2; then carrying out bromine modification on SiO2-NH2 at 0 DEG C by 2-bromoisobutyryl bromine (BiB); successfully adjusting the shell thickness of PMMA by adjusting the amounts of monomer methyl methacrylate (MMA) and ligand triphenylphosphine (PPh3) in a reaction system by an AGET ATRP (Activator Generated by Electron Transfer Atom Transfer Radical Polymerization) method; and then, etching nanosilicon dioxide balls by hydrofluoric acid to obtain the PMMA polymer vacant shells with different thicknesses.

Peptides are provided that have binding affinity for polymethyl methacrylate (PMMA). The polymethyl methacrylate-binding peptides may be used to prepare peptide-based reagents suitable for use in a variety of applications. The peptide-based reagents may be used to couple benefit agents to a PMMA polymer surface or may be used to couple a benefit agent comprising a PMMA polymer surface to a target surface, such as a body surface.

An epidural press-on prism comprises an optical surface microstructure, assembling protruding grooves, a material substrate and an epidural protecting layer. The material substrate is a substrate made of a PMMA polymeric material. The light transmittance of the PMMA polymeric material reaches 99%. The upper surface of the material substrate is the optical surface microstructure which adopts a Fresnel optical microstructure. The assembling protruding grooves are arranged around the optical surface microstructure in an encircling way. The bottom of the material substrate is the epidural protecting layer. The invention further provides an epidural press-on prism assembling method. The prism with relatively good capabilities of resisting external pollution has the characteristics of simplified technical process and relatively low assembling difficulties.

The invention relates to a preparation method of a graphene powder material. The preparation method comprises the following steps: (1) growing a vertical graphene array on a copper foil through roll-to-roll plasma chemical vapor deposition equipment by using a special process; (2) dripping a proper amount of PMMA solution on the surface of the copper foil on which the vertical graphene array is grown, uniformly spin-coating the copper foil, and heating in a drying oven for curing; (3) directly and completely stripping the cured vertical graphene PMMA polymer layer from the copper foil by using a mechanical stripping method according to the characteristic of poor binding force between the vertical graphene array and the copper foil; (4) soaking the stripped polymer layer in acetone to completely dissolve PMMA to obtain a graphene sheet suspension; and (5) after filtering and separating the graphene suspended matter, putting the graphene suspended matter into a ball mill or a sand mill to obtain the graphene powder material. The graphene powder material prepared by the preparation method disclosed by the invention has a relatively large lamellar area and relatively high conductivity and heat conductivity coefficient, and can be used as an additive material.

The invention relates to an energy storage polymer composite film based on inorganic insulating layer modification and a preparation method thereof, and belongs to the field of dielectric capacitor energy storage composite materials. The technical problem to be solved is that a polymer medium has low energy storage performance and poor breakdown characteristic. The composite film is composed of apolymer film as an intermediate layer and inorganic insulating layers as a top layer and a bottom layer. The method comprises the steps that a PMMA polymer film is firstly prepared by a casting method, and then dense uniform SiO2 insulating layers with equal thicknesses are deposited and grown on the upper surface and the lower surface of the PMMA polymer film by using a magnetron sputtering method to prepare the energy storage polymer composite film based on the inorganic insulating layer modification. The SiO2 insulating layers are introduced to remarkably improve the energy storage performance of the PMMA polymer thin film, the polymer composite film has higher polarization strength, energy storage efficiency and breakdown field strength, and is expected to serve as a novel material forsolving the difficulty problems of dielectric capacitor application and popularization. The preparation process is low in cost, easy to implement and good in environmental protection.

The invention provides an efficient sun screen. A PMMA polymer microsphere containing two groups -CH2-NH2 and -CO-NH2 is prepared to provide an excellent adsorption site for subsequent zinc oxide deposition so as to conveniently form a PMMA polymer microsphere nucleus and a zinc oxide shell, and an inorganic nuclear shell structure can obviously increase the SPF value and the PA value of sun screen cosmetics.

The invention discloses a method for preparing shape-adjustable polyion liquid-based anisotropic composite particles based on a seed polymerization method. The method comprises the following steps: preparing PMMA polymer seed balls in a reaction solvent through a polymerization method in the presence of an initiator and an emulsifier by taking purified MMA as a polymerization monomer; and dropwise adding an ionic liquid monomer into a PMMA polymer seed ball dispersion liquid, dropwise adding an initiator potassium persulfate aqueous solution after the ionic liquid monomer is fully swelled into the seed balls, uniformly stirring, heating to 70 DEG C, and reacting for 24 hours; According to the method, the morphology of the PMMA-PIL anisotropic composite particles is conveniently regulated and controlled through the simple and convenient method, and the prepared particles with different morphologies can be applied differently according to conditions. The PIL is a functional polymer and can be simply modified through methods such as anion exchange, so that the PIL also has a very positive effect on expanding the application range of the particles.

The invention provides a preparation method of sunscreen liquid microspheres. PMMA polymer microspheres containing- CH2-NH2 and -CO-NH2 groups are prepared, so excellent adsorption sites are provided for subsequent zinc oxide deposition, PMMA polymer microsphere cores and zinc oxide shells are convenient to form, and the SPF value and the PA value of sunscreen cosmetics can be remarkably increased through the inorganic core-shell structure.