15 results about "Ethylenedioxy" patented technology

The invention belongs to the field of biomedical materials, and discloses a hydrogel patch with piezoelectricity, conductivity and high adhesion and a preparation method and application of the hydrogel patch. Polyvinyl alcohol (PVA) and acrylic acid (AA) serve as polymer frameworks of the hydrogel patch; the invention relates to a nano-zinc oxide / poly (3, 4-ethylenedioxythiophene) / poly (styrenesulfonic acid) (PEDOT: PSS) composite conductive adhesive, which comprises nano-zinc oxide (ZnO) as a piezoelectric material, poly (3, 4-ethylenedioxythiophene)-poly (styrenesulfonic acid) (PEDOT: PSS) as a conductive material, and N-hydroxysuccinimide acrylate (NHS-AA) as an adhesive functional monomer. According to the invention, active ester groups in the N-hydroxysuccinimide acrylate are utilized, so that the patch can quickly form covalent amido bonds with amino groups on the surface of a tissue in a dry state, firm adhesion is realized, local nerve repair can be effectively promoted through a piezoelectric effect, a novel ideal material is provided for disease treatment, and the patch has wide application prospects. Wide clinical application prospects are realized in the field of biological medicines.

The invention provides a novel silane coupling agent and a preparation method thereof, and belongs to the technical field of silane coupling agents, and the preparation method comprises the following steps: taking chloropropyltriethoxysilane and 2, 2-(1, 2-ethanedioxy) diethyl mercaptan as raw materials, adding a catalyst and an acid-binding agent, mixing, and heating for reaction to obtain the novel silane coupling agent. The invention provides a novel silane coupling agent and a preparation method thereof. The purposes of facilitating industrial production and obtaining high-purity and high-yield products are achieved.

The application relates to the field of electrochemistry, in particular to a method for determining ion concentration based on a double electrolytic cell ion selective electrode, which comprises the following steps: using a poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonic acid) modified glassy carbon electrode or a reduced graphene oxide modified glassy carbon electrode as a working electrode, using a full solid-state ion selective electrode as a reference electrode, and using a platinum wire electrode as a counter electrode; inserting the working electrode and the counter electrode into a test electrolytic cell, inserting the reference electrode into a sample electrolytic cell, connecting the test electrolytic cell and the sample electrolytic cell through Ag / AgCl as a salt bridge, and determining the ion concentration in a to-be-measured solution by adopting a constant potential coulomb analysis method. The technical scheme of the application can minimize the current response time while ensuring the accuracy of ion concentration determination, realizes rapid measurement of ion concentration, and can be applied to detection of ion concentration in human serum.

The invention relates to the technical field of batteries, in particular to a silicon-carbon composite material and a lithium ion secondary battery. The silicon-carbon composite material comprises silicon-carbon particles and an aromatic polymer coating layer on the surface, and a monomer of the silicon-carbon composite material is selected from at least one of aniline, pyrrole, thiophene, 3, 4-ethylenedioxythiophene and phenylacetylene. The silicon content of the central area of the silicon-carbon particle is higher than that of the edge area, in the cross section scanning electron microscope energy spectrum of the silicon-carbon composite material, the silicon content of the central area is x0, the silicon content of any point on the edge is x1, a is equal to x1 / x0, and 0.8 < = alt; 1; the distance from the center of the silicon-carbon particle to the edge is R, the silicon content at a position 0.5 R away from the center of the silicon-carbon particle is x2, and x2 is greater than (x1 + x0) / 2; in a small-angle XRD (X-Ray Diffraction) spectrum of the silicon-carbon composite material, a first characteristic peak exists at 4-5 degrees, and the half-peak width is 0.05-0.6 degree; comprising the silicon-carbon composite material disclosed by the invention is high in cycle retention rate and good in low-temperature performance.

The invention provides ultrafast self-healing polyurethane based on disulfide bonds and a preparation method and application thereof, and the preparation method comprises the following steps: (1) under vacuum, mixing polytetrahydrofuran diol, 2, 2 '-(1, 2-ethanedioxy) diethyl mercaptan and 2-hydroxyethyl disulfide, and reacting to obtain a homogeneous soft segment mixture; (2) adding isophorone diisocyanate into the homogeneous soft segment mixture, and carrying out prepolymerization and chain extension reaction to obtain a reacted solution; and (3) adding pentaerythritol tetrakis (3-mercaptopropionic acid) into the reacted solution to carry out cross-linking reaction, and then adding a catalyst to assist polymerization, thereby obtaining the disulfide bond-based ultrafast self-healing polyurethane. According to the present invention, the dynamic disulfide bond is introduced into the polyurethane, such that the high self-healing efficiency and the short polymerization time can be achieved, and the reprocessing and the recycling can be achieved;

The application belongs to the technical field of polymers, and particularly relates to a triphenylamine derivative conjugated polymer and a preparation method and application thereof. The triphenylamine derivative conjugated polymer has a structure shown in formula (1): wherein X is an electron-withdrawing group; D is thiophene or 3,4-ethylenedioxythiophene; pi is thiophene or 3,4-ethylenedioxythiophene; and n is a positive integer. The triphenylamine derivative conjugated polymer has good optical contrast and coloring efficiency.

The application discloses a polyester-based high-toughness plastic sheet and a preparation method thereof, and belongs to the technical field of high polymer material preparation.The polyester-based high-toughness plastic sheet comprises modified polyester resin, a first modifier and a second modifier; the modified polyester resin is prepared by esterification through dehydration condensation of unsaturated alkenyl diacid anhydride and dihydroxyl crown ether as raw materials; the first modifier is alkyl phenyl ether of double-end secondary ammonium salt; and the second modifier is 2,2'-(1,2-ethylenedioxy) bisethyl mercaptan with double-end mercapto groups; the polyester-based high-toughness plastic sheet is provided; through a reasonable modification method, the toughness can be improved without obviously sacrificing other performances.

The invention relates to the field of microalgae efficient culture and wastewater recycling treatment, in particular to a microalgae biofilm carrier with a conductive coating and a preparation method of the microalgae biofilm carrier. The preparation method comprises the following steps: adding carbon quantum dots into poly (3, 4-ethylenedioxythiophene)-poly (styrenesulfonic acid), adding a reagent for promoting material adhesion, and uniformly mixing to obtain a suspension; soaking the substrate in a surface tension adjusting reagent, and then drying to obtain a modified substrate; and spin-coating the suspension on the surface of a modified substrate, and then sequentially cleaning and freeze-drying to obtain the microalgae biofilm carrier. Compared with a traditional microalgae biofilm carrier, the microalgae biofilm carrier has higher electron conduction efficiency, is more beneficial to attachment of microalgae organisms, can improve the extracellular electron transfer efficiency of the microalgae and the photosynthesis rate of the microalgae, and promotes rapid formation of a microalgae biofilm.

The invention provides a modified benzoxazine resin coating and a preparation method thereof, and the preparation method comprises the following steps: raw materials including curcumin, paraformaldehyde and a compound containing a primary amine group are subjected to a reaction in an organic solvent to obtain a modified benzoxazine monomer, and then the modified benzoxazine monomer is filtered, the compound containing the primary amine group is prepared from the following raw materials: DL-alpha-lipoic acid, triethylamine, 2, 2 '-(ethylenedioxy) bis (ethylamine) and a catalyst; carrying out rotary evaporation on the solution obtained by filtering to remove redundant organic solvent, and then obtaining a benzoxazine monomer concentrated solution; uniformly stirring the benzoxazine monomer concentrated solution, and coating the benzoxazine monomer concentrated solution on the surface of a substrate; and heating and curing the surface of the substrate to form the coating. The modified benzoxazine resin provided by the invention has relatively low curing temperature, excellent mechanical properties and corrosion resistance.

The invention belongs to the technical field of terahertz wave absorption, provides a chip-borne multi-ball embedded structure terahertz wave-absorbing material and a preparation method thereof, and is used for solving the problems of large thickness, high reflection intensity, easy generation of secondary electromagnetic pollution and the like of an existing conductive polymer electromagnetic wave-absorbing material. The preparation method comprises the following steps: taking large-area flaky poly (3, 4-ethylenedioxythiophene) (PEDOT) as a matrix, and randomly embedding polystyrene microspheres in the matrix; according to the invention, micron-sized polystyrene microspheres are introduced to construct a spatial isolation template, a propagation path of terahertz waves is greatly increased by using a lamellar structure which is randomly and continuously deformed, and incident electromagnetic waves can be gradually and effectively lost due to multiple reflections, so that the terahertz wave-absorbing agent with excellent performance is obtained; moreover, waterborne polyurethane can be filled with the on-chip multi-ball embedded structure wave-absorbing agent to obtain terahertz wave-absorbing slurry, so that the terahertz wave-absorbing slurry and a device are integrated, or a flexible terahertz wave-absorbing film is obtained through drying.

The invention discloses a star-shaped triphenylamine derivative conjugated polymer as well as a preparation method and application thereof. Relates to the field of electrochromic materials. The structural formula of the star-shaped triphenylamine derivative conjugated polymer is shown as the following formula (I), wherein X is an electron withdrawing group and is selected from nitro, cyano, aldehyde group, carboxyl, thiol group, acyl or trifluoromethyl; pi is thiophene or 3, 4-ethylenedioxythiophene; and n is an integer from 1 to 10000. According to the star-shaped triphenylamine derivative conjugated polymer provided by the invention, an electron withdrawing group (X) is introduced to a triphenylamine para-position and thiophene or 3, 4-ethylenedioxythiophene is combined as a pi bridge, so that a three-dimensional star-shaped conjugated topological structure is constructed. According to the design, the limitation of electron transfer anisotropy of the traditional one-dimensional linear conjugated polymer is effectively overcome, and the intramolecular charge delocalization capability and the electron transfer rate are enhanced.

The application relates to the technical field of liquid crystal materials, and discloses a body temperature responsive liquid crystal elastomer as well as a preparation method and application thereof. The body temperature responsive liquid crystal elastomer is obtained by carrying out cross-linking reaction on liquid crystal monomers, a chain extender, a cross-linking agent and a catalyst to obtain an intermediate, and then carrying out cross-linking reaction on the intermediate to obtain the body temperature responsive liquid crystal elastomer; the liquid crystal monomers are 4-(6-(acryloyloxy) hexyloxy) phenyl-4-(6-(acryloyloxy) hexyloxy) benzoate and / or polyethylene glycol diacrylate; and the chain extender comprises at least one of 2,2'-(ethylenedioxy) diethyl thiol, trimethylolpropane tris(3-mercaptopropionate) or pentaerythritol tetra(3-mercaptopropionate). The liquid crystal elastomer prepared by the application has reversible body temperature responsiveness and can directly contact human skin to generate strain. After contacting the human body, the human body temperature heats the liquid crystal elastomer, and the liquid crystal elastomer deforms through phase change; when the liquid crystal elastomer leaves the human body, the liquid crystal elastomer restores to the original state through phase change in the process of cooling to room temperature.

A conjugated polymer comprising 3, 4-ethylenedioxy thiophene having general formula (I): wherein: R1, R2, R3 and R4, equal to or different from each other, represent a hydrogen atom; or are selected from ester groups having general formula (II): wherein Rs is selected from C1-C20 alkyl groups, preferably C1-C15, more preferably is a C15 alkyl group, provided that at least two of R1, R2, R3 and R4 are selected from ester groups having general formula (II); preferably, R2 and R3, equal to each other, represent a hydrogen atom and R1 and R4, equal to each other, are selected from ester groups having general formula (II); - m is an integer ranging from 0 to 100, preferably ranging from 0 to 20; - n is an integer ranging from 10 to 100, preferably ranging from 15 to 20; - A is a monovalent sulfonate anion, optionally polymeric, preferably selected from trifluoromethanesulfonate, nonafluorobutanesulfonate, p-toluenesulfonate, poly(styrene sulfonate). The above-mentioned conjugated polymer having general formula (I) can be advantageously used in anticorrosive coatings of metal surfaces. Furthermore, the above-mentioned conjugated polymer having general formula (I) can be advantageously used in the field of organic electronics, sensors and actuators, as well as in the construction of battery electrodes. Furthermore, the above-mentioned conjugated polymer having general formula (I) can be advantageously used in 3D printing compositions.

The application relates to the technical field of analytical detection, in particular to a molecular imprinting sensor for detecting alpha-linolenic acid and a preparation method and application thereof. The molecular imprinting sensor is prepared by in-situ growth of ZIF-8 on the surface of MXene material, addition of thionine as a probe to obtain MXene@ZIF-8-Thi composite material, coating of the composite material on the surface of a SPE electrode, polymerization of a molecular imprinting polymer film on the electrode surface by using o-phenylenediamine and 3,4-ethylenedioxythiophene as functional monomers and alpha-linolenic acid as a template molecule, and preparation of the molecular imprinting sensor after elution of the template molecule. The molecular imprinting sensor can rapidly and accurately detect the content of alpha-linolenic acid in pork and other samples, realizes high-sensitivity and high-selectivity detection of alpha-linolenic acid, and has a wide application prospect in the field of food safety detection due to the simple preparation method and low manufacturing cost.

The application discloses a solid-liquid mixed aluminum electrolytic capacitor suitable for a low-pressure environment and relates to the technical field of capacitors.The application comprises a core package, poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonic acid), an electrolyte, a rubber plug and an aluminum shell.The core package is wound by a positive foil, a carbon foil, a guide needle and electrolytic paper and has a cylindrical winding structure.The electrolyte is obtained by mixing ethylene glycol, 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide, N-butyl-N-methylpyrrolidinium bis(trifluoromethylsulfonyl) imide, ethyl trifluoroacetate, fluorinated ethylene carbonate, cyclic carbonate and nano silicon dioxide.The electrolyte prepared from ethyl trifluoroacetate and other components effectively improves the low-voltage resistance of the electrolytic capacitor.The introduction of the high-hardness rubber plug and other components further improves the low-temperature and low-voltage resistance.Therefore, the application has a wider application prospect.