8 results about "Biphenylamine" patented technology

This application relates to a terphenylamine skeleton compound, its preparation method, and its application, belonging to the field of chemical synthesis technology. The preparation method of the terphenylamine skeleton compound of this application includes the following steps: dissolving 2,4,6-triphenylaniline with thiazole-4-carboxaldehyde or thiophene-3-carboxaldehyde in a solvent, conducting a reductive amination reaction under reducing agent conditions, quenching, extraction, washing, concentration to remove solvent, and purification to obtain the terphenylamine skeleton compound. This application provides a simple and mild synthetic method for the natural active products 5'-phenyl-N-(thiazol-4-ylmethyl)-[1,1':3',1''-terphenyl]-2'-amine and 5'-phenyl-N-(thiophene-3-ylmethyl)-[1,1':3',1''-terphenyl]-2'-amine, which can only be extracted from the secondary metabolites of the marine fungus Aspergillus sp. Furthermore, this method utilizes widely available raw materials, which is beneficial for large-scale industrial production of these natural active products.

This invention provides a multilayer polyimide film with excellent heat resistance, low dielectric loss tangent, and dimensional stability. The multilayer polyimide film comprises a heat-resistant polyimide layer and a heat-fusion polyimide layer laminated on one or both sides; the heat-resistant polyimide is obtained from a tetracarboxylic acid component containing more than 75 mol% of 3,3',4,4'-biphenyltetracarboxylic dianhydride (s-BPDA) and less than 25 mol% of pyromellitic dianhydride (PMDA), and a diamine component containing 70 mol% to 95 mol% of p-phenylenediamine and 5 mol% to 30 mol% of 2,2'-dimethylbenzidine; the heat-fusion polyimide is obtained from a tetracarboxylic acid component containing 10 mol% to 60 mol% of s-BPDA and 40 mol% to 90 mol% of PMDA, and a diamine component containing more than 50 mol% of 2,2-bis[4-(4-aminophenoxy)phenyl]propane.

This invention belongs to the field of nanocomposite materials technology, specifically disclosing a cobalt / boron / nitrogen co-doped carbon nanosphere membrane modification material, its preparation method, and its application. The preparation method includes the following steps: S1, adding 3,3'-diaminobenzidine, Pluronic F-127, cobalt source, zinc borate, and p-benzoquinone sequentially to an ethanol solution in proportion, reacting, filtering, and washing to obtain a brown solid; S2, drying the brown solid obtained in S1, and then subjecting it to pyrolysis to obtain the Co@BNG-CNSs membrane modification material. This invention, using the aforementioned cobalt / boron / nitrogen co-doped carbon nanosphere membrane modification material, its preparation method, and its application, constructs a high-speed electron transport channel from the metal core to the reaction interface, greatly accelerating the liquid-liquid and liquid-solid conversion kinetics of LiPSs, ultimately achieving long-term cycle stability and extended lifespan of lithium-sulfur batteries.

The application discloses a Hg 2+ and Cd 2+ differential detection and adsorption removal method, and a zinc-based metal organic framework loaded with silver nanoparticles (ZIF-AgNPs) is prepared by an in-situ reduction method, has oxidase-like activity, and can catalyze color development of 3,3',5,5'-tetramethylbenzidine (TMB). 2+ or Cd 2+ can destroy the ZIF structure and inhibit the activity, and makes the system fade. By utilizing the differential response of the two ions to pH, a multi-channel colorimetric array is constructed, and machine learning is combined to realize classification identification and quantitative detection of the two ions. Meanwhile, the material can efficiently adsorb and remove heavy metal ions in water through coordination, integrates visual detection, intelligent identification and adsorption, and can be widely applied to the fields of environmental monitoring, food safety detection and heavy metal pollution treatment.

The application discloses a covalent organic framework material, a solid-phase microextraction probe and a preparation method and application thereof, and relates to the technical field of material preparation and component detection. The application adopts 3,3'-dihydroxydiphenylamine and 1,3,6,8-tetra(4-formaldehyde phenyl) perylene as synthetic monomers, and synthesizes Py-DHBD-COF through a solvothermal method. The synthetic material is coated on the surface of an acid-etched stainless steel wire through polyacrylonitrile glue, and a solid-phase microextraction probe modified with a Py-DHBD-COF coating is prepared. The Py-DHBD-COF coating forms hydrogen bonds, pi-pi stacking and hydrophobic interaction with psychotropic drugs through its pi conjugated system, imine bonds and hydroxyl groups, so that efficient and selective adsorption of various psychotropic drugs is realized. In combination with HPLC-MS / MS technology, the probe shows high sensitivity, a wide linear range and good precision in the detection of three kinds of psychotropic drugs.

This invention relates to a multi-color electrochromic device and its fabrication method. The multi-color electrochromic device has a five-layer structure, consisting of a first ITO conductive glass, a first electrochromic layer, an electrolyte layer, a second electrochromic layer, and a second ITO conductive glass. The first electrochromic layer comprises surfactant I and poly(3,4-ethylenedioxythiophene); the second electrochromic layer comprises surfactant II and a polytetraphenylbenzidine derivative. By utilizing the color characteristics exhibited when the first and second electrochromic layers undergo redox reactions at different voltages, the electrochromic device achieves multiple color transitions from transparent to blue, black, and green, ultimately returning to transparent. This device can be widely used in applications such as solar panels for new energy vehicles and smart photochromic glasses.

The application discloses a preparation method of a branched sulfonated polyimide film, which comprises the following steps: preparing 1,3,5-tri(4-naphthoxy-1,8-dioic acid) benzene trianhydride, using the 1,3,5-tri(4-naphthoxy-1,8-dioic acid) benzene trianhydride as raw material, and adding 4,4'-diamino diphenyl, 2,2'-disulfonic acid benzidine, triethylamine and benzoic acid to obtain a triethylamine salt type branched sulfonated polyimide film; soaking the triethylamine salt type branched sulfonated polyimide film in anhydrous ethanol, then soaking the triethylamine salt type branched sulfonated polyimide film in a sulfuric acid aqueous solution, and then washing the triethylamine salt type branched sulfonated polyimide film with deionized water to obtain a branched sulfonated polyimide film, and storing the branched sulfonated polyimide film. The branched sulfonated polyimide film prepared by the application has good performance and is suitable for a full vanadium redox flow battery.

The present invention provides a blended film with a tensile strength of 130 MPa or more that comprises: a polyamide-imide including, as polymerization units, trimellitic acid anhydride (TMA) and a diisocyanate monomer including at least one selected from the group consisting of methylene diphenyl diisocyanate (MDI), 1,5-naphthalene diisocyanate(NDI), p-phenylene diisocyanate(PPDI), m-phenylene diisocyanate(MPDI), 2,4-toluene diisocyanate(TDI), 3,3'-dimethyl-4,4'-diphenylmethane diisocyanate, 3,3'-dimethyl-4,4'-biphenyl diisocyanate, 4,4'-diphenylisopropylidene diisocyanate, 3,3'-dimethoxy-4,4'-biphenyl diisocyanate, dianisidine diisocyanate, tolidine diisocyanate(TODI), and hexamethylene diisocyanate; and a polyimide including, as polymerization units, a dianhydride monomer including at least one selected from the group consisting of pyromellitic dianhydride(PMDA), biphenyl tetracarboxylic dianhydride(BPDA), and benophenone tetracarboxylic dianhydride(BTDA), and a diamine monomer including at least one selected from the group consisting of 4,4'-diaminodiphenylether (ODA), 4,4'-methylenedianiline (MDA), metaphenylenediamine (MPD), paraphenylenediamine (PPD), and m-tolidine.