395 results about "Vinylbital" patented technology

The invention discloses a nano blocking agent for drilling fluid and a preparation method thereof, and belongs to the technical field of blocking agents, the nano blocking agent for drilling fluid is prepared by reaction of a core layer blocking agent and a shell layer blocking agent, the core layer blocking agent is prepared by reacting nano silicon dioxide, gamma-methacryloxypropyltrimethoxysilane and a first part of vinylphosphonic acid, and has secondary blocking capability; and the shell blocking agent is prepared by reacting a second part of vinyl phosphonic acid, styrene and 2-dodecene-1-yl succinic anhydride, and has the characteristic of flexibility. The nano plugging agent has rigid supporting and flexible deformation capabilities, and the high-temperature stability and compressive strength of a plugging layer are remarkably improved. The chemical binding force of the plugging agent and the rock is enhanced; the hydrolysable methoxyl reserved in the core layer provides a secondary plugging function, and the plugging validity period is prolonged. The invention relates to a preparation method of a nano blocking agent for drilling fluid, which is used for preparing the nano blocking agent for drilling fluid.

The invention provides a salt-responsive temperature-resistant salt-resistant water-based drilling fluid tackifying filtrate reducer as well as a preparation method and application thereof, and belongs to the technical field of drilling. The tackifying filtrate reducer is prepared from the following raw materials in parts by mass: 30 to 50 parts of 1-(2-carboxyethyl)-2-vinylpyridine, 20 to 40 parts of (3-(methacrylamido) propyl) dimethyl (3-thiopropyl) ammonium hydroxide inner salt, 35 to 55 parts of N, N-dimethylacrylamide, 10 to 25 parts of 4-vinylpyridine, 300 to 500 parts of water and 1 to 5 parts of an initiator. According to the filtrate reducer, cations and anions are concentrated on one monomer molecule, so that the synthesized product contains the cations and the anions with the same charge number, has good adsorption capacity and salt response characteristics, is compatible with salt essentially, can effectively resist high temperature and high salt, and can be recycled. And the viscosity-increasing and filtrate-reducing agent has good viscosity-increasing and filtrate-reducing effects on the drilling fluid.

The invention provides a method for synthesizing 1, 2-bis (4-vinyl phenyl) ethane, which comprises the following steps: adding a first solvent, methyl triphenyl phosphine halide and strong alkali into a reaction flask, and uniformly stirring to obtain a first mixed solution; heating the first mixed solution and carrying out reflux reaction for 1 hour; dropwise adding a 1, 2-bis (p-formaldehyde phenyl) ethane solution until the reflux reaction is finished to obtain a second mixed solution; reducing the temperature of the second mixed solution to room temperature, and adjusting the pH value of the second mixed solution to obtain a first solution; layering the first solution, and taking an organic layer; adding a polymerization inhibitor into the organic layer to obtain a second solution; concentrating the second solution to obtain a 1, 2-bis (4-vinyl phenyl) ethane crude product; adding a poor solvent into the crude product, stirring and crystallizing; filtering the crystal to obtain a filter cake, adding a second solvent into the filter cake, and washing and drying the filter cake to obtain 1, 2-bis (4-vinyl phenyl) ethane; the method for synthesizing the BVPE is simple and low in raw material cost, and the synthesized BVPE is high in purity and free of product isomeride.

The present invention provides a 4-vinylguaiacol oxygenase mutant for synthesizing vanillin, and an engineered bacterium thereof. The 4-vinylguaiacol oxygenase mutant is an enzyme having the sequence as shown in SEQ ID NO. 1, which exhibits a double-site mutation of D27P / T216M, D27P / M351F, D27P / Y156D, M351F / Y156D, T216M / Y156D or T216M / M351F, or a single-site mutation of T216M, T216L, S280M, G307P or M351F, and can be used for catalyzing 4-vinylguaiacol to generate vanillin.

The invention relates to a preparation method of a high-lithium-affinity vinylene covalent organic framework material serving as a lithium metal negative electrode interface protective layer. The method comprises the following steps: firstly, by utilizing a simple hydrothermal synthesis method, taking 1, 3, 5-trimethyl-2, 4, 6-triazine (TMT) and 2, 2-bipyridine-5, 5-diformaldehyde (BPY) as monomers, and carrying out Aldol condensation reaction to synthesize a covalent organic framework material connected by a vinylene bond, which is named as viCOF-bpy; the electrochemical performance of the material is verified by modifying the surface of a copper pole piece with the viCOF-bpy material and then assembling a battery. The lithium-loving group on the material skeleton can promote the migration of lithium ions, and the vinylidene has very strong chemical stability, so that the electrochemical performance of the lithium metal battery can be effectively improved.

The invention provides a cronobacter malonate strain and application thereof, the strain is preserved in China Center for Type Culture Collection on January 15, 2025, the preservation date is January 15, 2025, and the preservation number is CCTCC M 2025146. The strain has excellent capability of producing 4-vinyl guaiacol, and the yield in a sorghum juice fermentation culture medium is 2.70 + / -0.15 mg / L; meanwhile, the strain can resist ferulic acid and has good capability of converting ferulic acid to generate 4-vinyl guaiacol, and when 0.1% (w / w) of ferulic acid is added into a fermentation culture medium, the content of 4-vinyl guaiacol reaches 2.68 + / -0.04 g / L. The strain is applied to production of Maotai-flavor liquor, the content of 4-ethyl guaiacol in raw liquor reaches 3.20 + / -0.26 mg / L and is remarkably increased by 223.23% (P is smaller than 0.01) compared with the content of 4-ethyl guaiacol without the strain, the Maotai flavor is prominent through sensory evaluation, the flower, fruit and burnt flavor is obvious, and the strain has important significance on improvement of the health quality of the liquor.

The invention relates to the technical field of corrosion inhibitors, and discloses a preparation method of a modified imidazoline corrosion inhibitor, which comprises the following steps: carrying out quaternization reaction on tertiary amine group in an imidazoline intermediate and chlorine in benzyl chloride to generate quaternary ammonium salt, introducing hydroxyl, and continuing to carry out esterification reaction with boric acid group in 4-aminophenylboronic acid to obtain the modified imidazoline corrosion inhibitor. The modified imidazoline corrosion inhibitor is prepared by the following steps of: firstly, introducing amino groups, then carrying out amidation reaction with acyl chloride groups in 4-vinyl benzoyl chloride, introducing alkenyl groups, and finally carrying out click reaction with sulfydryl groups in DSB-TA, so as to generate the modified imidazoline corrosion inhibitor. The modified imidazoline corrosion inhibitor disclosed by the invention has a relatively good corrosion inhibition effect.

The invention relates to the technical field of tobacco smoke analysis, and discloses a gas sensor for detecting the content of 3-vinylpyridine in real time and a preparation method of the gas sensor. In order to realize accurate detection of tobacco smoke in the environment, 3-vinylpyridine in environmental gas is taken as a detection object, a SnO2 nanofiber material is further taken as a gas sensitive element, the detection sensitivity of the 3-vinylpyridine is remarkably improved, the SnO2 nanofiber material is arranged on the heating substrate, and the gas sensitive element is arranged on the heating substrate. The gas sensor generates a resistance change signal which linearly changes along with the change of the content of 3-vinylpyridine, so that the environmental tracing of the tobacco smoke is realized. Therefore, the invention provides the gas sensor with high sensitivity and high accuracy for tobacco smoke environment tracing.

The invention relates to the technical field of water treatment, in particular to a rare earth composite antibacterial scale inhibitor and a preparation method thereof.The preparation method comprises the steps that glycidyl methacrylate, vinylphosphonic acid, N-vinylthiourea and acrylic acid are mixed, a mixed solvent of deionized water and ethyl alcohol is added, nitrogen is introduced after the mixture is stirred and dissolved, azodiisobutyronitrile is added, the mixture is stirred at the constant temperature for a reaction, and the rare earth composite antibacterial scale inhibitor is obtained; the preparation method comprises the following steps: preparing a quadripolymer solution, adding trimethylamine hydrochloride into the quadripolymer solution, carrying out heating and stirring reaction, adjusting the pH value to be neutral to obtain a cationized copolymer solution, dropwise adding the cationized copolymer solution into a cerous nitrate solution, carrying out stirring reaction at room temperature, carrying out centrifugal washing, and carrying out freeze drying to obtain the rare earth composite antibacterial scale inhibitor. The prepared antibacterial scale inhibitor is remarkable in effect, metal ions can be combined in scale inhibition, growth of scale crystals is prevented, the rare earth ions and the copolymer are synergistically antibacterial, and the antibacterial scale inhibitor is durable, stable, good in dispersity and capable of adapting to complex environments.

The present invention relates to a vinyl pyrrolidone copolymer of N-vinyl pyrrolidone and a maleic acid comonomer wherein the vinyl pyrrolidone copolymer is functionalized with a benzophenone substituent (BP) wherein the amount of maleic acid in the vinyl pyrrolidone copolymer is less than 1 mol%, preferably from 0.1 to 0.95 mol%, further preferably from 0.1 to 0.90 mol%, more preferably from 0.1 to 0.85 mol%, more preferably from 0.2 to 0.88 mol%, and the amount of N-vinyl pyrrolidone is less than 1 mol%, preferably from 0.1 to 0.95 mol%, further preferably from 0.1 to 0.90 mol%, more preferably from 0.1 to 0.85 mol%, more preferably from 0.2 to 0.88 mol%. The invention relates to the technical field of organic solvents, in particular to a method for preparing the organic solvents, which comprises the following steps of: preferably, 1-3mol%, more preferably, 0.3-0.88 mol%, more preferably, 0.4-0.88 mol%, even more preferably, 0.5-0.85 The vinyl pyrrolidone copolymer of the present invention is particularly suitable for use in coatings of medical devices and / or medical aids. Thus, the invention also relates to a composition comprising a vinyl pyrrolidone copolymer and optionally a cross-linking agent, and a medical device having a coating comprising a cross-linked vinyl pyrrolidone copolymer and optionally a cross-linking agent.

The present application belongs to the field of rare earth separation, and particularly discloses a method for separating heavy rare earth ions. In the method, a vinyl complexing agent including at least one of vinyl phosphonic acid, vinyl sulfonic acid, vinyl acetic acid or 4-vinyl benzyl chloride is used to selectively complex heavy rare earth ions in an aqueous phase, so as to obviously increase the distribution coefficient between different heavy rare earth ions. Then, the aqueous phase containing the complex of heavy rare earth ions is subjected to extraction separation of different heavy rare earth ions with an organic phase containing an extractant, so as to achieve the purpose of improving the separation efficiency.

The present invention discloses the application of a water-soluble and positively charged fluorescent probe TPA-3Py for the detection of sodium heparin. TPA-3Py is obtained by covalently connecting three methylated vinylpyridines to the three arms of a triphenylamine molecule respectively. Heparin can induce the aggregation-induced emission effect of this fluorescent molecule. With the increase of the heparin content, the fluorescence intensity increases significantly, showing a good fluorescence turn-on response, overcoming the deficiency that the fluorescence probe quenches due to aggregation during the detection of heparin in the prior art. When a 10 μM aqueous solution of TPA-3Py is used for the detection of heparin, a stable fluorescence intensity is achieved within 5 minutes, the linear range is 0 - 6.14 mg / L (R<supgt;2< / supgt> = 0.9938), the lowest detection limit is 49.53 ng / mL, and the quantum yield reaches 4.85%. For the detection of sodium heparin, the TPA-3Py probe adopted in the present invention overcomes the quenching phenomenon caused by aggregation and exhibits a significant AIE effect. The fluorescent probe TPA-3Py for the detection of sodium heparin in the present invention has high sensitivity, high fluorescence intensity, rapid response and stable signal. The fluorescent molecular structure of TPA-3Py is simple, and the detection method is simple and easy to implement, which is worthy of popularization and application in the determination of the sodium heparin content.

The invention discloses a vinylidene bridged covalent organic framework material based on 2, 7-diaza pyrene and a preparation method thereof.The 2, 7-diaza pyrene is used as a core monomer, under the catalysis of benzoic acid and benzoic anhydride, methyl is activated to form an enamine intermediate, aryl aldehyde is attacked to form unsubstituted carbon-carbon double bonds, and under the heating condition, the 2, 7-diaza pyrene is synthesized into the vinylidene bridged covalent organic framework material based on 2, 7-diaza pyrene. And two vinylidene bridged COFs materials with high crystallinity are successfully synthesized. The COFs material disclosed by the invention has a high specific surface area, a uniform through rhombic pore channel structure and excellent chemical stability, and has an important application prospect in the field of photoelectrocatalysis.

The invention provides a spiro butane indolone derivative as well as a preparation method and application thereof, and belongs to the technical field of organic chemical synthesis. The series cyclization coupling reaction of the N-iodo aryl dicyclobutyl amide compound and the vinyl pyridine compound is realized by utilizing a photocatalytic system, and the method is used for constructing the spiro butane indolone derivative containing the pyridine structure. The spirobutane indolone derivative synthesized by the invention has an inhibition effect on H1975 human lung adenocarcinoma cells; the preparation method provided by the invention is mild in condition and simple and convenient to operate, has economical steps, provides a convenient synthesis way for the complex bioactive molecules, and has a good application prospect.

The invention relates to the technical field of cables, and provides a corrosion-resistant aerial insulated cable and a manufacturing method thereof. A corrosion-resistant overhead insulated cable sequentially comprises a conductor, a shielding layer and an insulating layer from inside to outside, and the insulating layer is prepared from the following raw materials in parts by weight: 65-75 parts of high-density polyethylene, 5-7 parts of modified kaolin, 13-17 parts of ethylene-tetrafluoroethylene copolymer, 0.5-2 parts of antioxidant, 1-3 parts of plasticizer, 8-10 parts of flame retardant and 0.5-1.5 parts of lubricant; wherein the modified kaolin is prepared by the following steps: firstly, modifying kaolin by vinyltriethoxysilane for the first time to obtain silanized kaolin, and then modifying the silanized kaolin by lauryl amine dipropylidene diamine and gamma-glycidyl ether oxyethyl trimethoxysilane for the second time. According to the technical scheme, the problem of poor corrosion resistance of the overhead insulated cable in the prior art is solved.

This invention provides an inkjet composition set that exhibits excellent blocking resistance, adhesion, tackiness, and shrinkage properties. [Solution] A radiation-curable inkjet ink composition comprising a polyfunctional monomer with three or more functions and 5-methyl-3-vinyloxazolidine-2-one, wherein the content of 5-methyl-3-vinyloxazolidine-2-one is less than 50% by mass of the total amount of the ink composition, the content of monofunctional monomers is 60% by mass or more of the total amount of polymerizable compounds, and the content of polyfunctional monomers with three or more functions is more than 1% by mass of the total amount of the ink composition.

The invention provides a preparation method of a natural product 6-HHS. The method comprises the following steps: reacting a compound 1 sanguinarine with vinyl magnesium bromide to prepare a compound 2; and reacting the compound 2 with a borane tetrahydrofuran complex to prepare 6-HHS. According to the method, sanguinarine is used as a raw material to prepare the natural product 6-HHS, the synthesis route is short, the synthesis efficiency is high, the yield of each step is 85% or above, the comprehensive yield of the natural product 6-HHS can reach 76%, operation is easy and convenient, the purity is high, and a simple, convenient and efficient way can be provided for chemical synthesis of 6-HHS.

The invention discloses an ionic gel moisture power generation and power supply system and a preparation method and application thereof, and belongs to the technical field of functional materials and waste gas monitoring. According to the system, dopamine, 1-vinyl imidazole, n-bromobutane and acrylic acid are used as raw materials, and an ionic gel moisture power generation material is prepared through an ultraviolet curing process; carbon cloth is used as an electrode to assemble a moisture power generation device, the device is integrated with a plastic pipe, and stable power support is provided for a waste gas monitoring sensor in the pipe. The ionic gel prepared by the invention has excellent cohesiveness, moisture responsiveness, ionic conductivity and mechanical stability, and the ultraviolet curing process is efficient and environment-friendly; the moisture power generation device can utilize environmental moisture to continuously generate power, solves the problem that a traditional waste gas monitoring sensor depends on an external power supply or frequently replaces a battery, is adaptive to a complex application scene of a plastic pipe, and has a wide industrial application prospect.

The invention relates to an ultrahigh-temperature and high-salinity water shutoff system and a preparation method and application thereof, and belongs to the field of oilfield water shutoff systems, and the ultrahigh-temperature and high-salinity water shutoff system comprises the following substances in parts by weight: 8-10 parts of 2-acrylamido-2-methylpropanesulfonic acid, 6-10 parts of N-vinyl caprolactam, 6-8 parts of N-isopropylacrylamide and 4-6 parts of monostearyl maleate. The invention relates to a water-based adhesive which is prepared from the following components in parts by weight: 6 to 10 parts of 2-acrylamido-2-methylpropanesulfonic acid, 3 to 5 parts of dimethylaminoethyl methacrylate, 0.2 to 0.4 part of dimethyl 2-butenedioate trimethylolpropane triacrylate, 3 to 5 parts of modified nanoscale silicon dioxide, 2 to 4 parts of modified nanoscale calcium carbonate and 100 to 120 parts of deionized water. The plugging agent provided by the invention can still maintain good plugging performance in an oil reservoir environment in which the underground temperature of an oil field exceeds 120 DEG C and / or the degree of mineralization is higher than 100000mg / L, so that the plugging efficiency of a water seepage layer of an oil well in the oil field is ensured.

The application discloses an electromagnetic interference resistant power cable and a preparation method thereof, and relates to the technical field of cables.The (4-vinylphenyl) sodium methyl sulfonate modified cross-linked polyethylene is used as a raw material to achieve the corrosion resistance effect; then the acrylic ester and the additive are uniformly mixed, and the first spraying is carried out at high temperature to form an insulating layer outside the conductor, thereby prolonging the service life of the cable; and the adhesive and the composite particles and copper nano powder are mixed to carry out the second spraying, thereby forming a composite outer shielding layer with a lotus leaf-like epidermis structure, which can achieve the corrosion resistance effect and enhance the electromagnetic shielding effect. The composite particles are formed by the reaction of zinc sulfate heptahydrate, 5-nitrobenzimidazole and lauryl amido propyl trimethyl ammonium chloride to form ZIF-8 structure loaded with lauryl amido propyl trimethyl ammonium chloride, so that the effects of wear resistance and electromagnetic interference resistance are achieved, the compatibility between the inorganic particles and the polymer matrix is improved, and good flame retardation effect is achieved.

The application discloses a platinum complex with controllable activity and a preparation method and application thereof, which is formed by coordination of vinyl siloxane, modified ligand and chloroplatinic acid; the modified ligand is prepared by reaction of maleic anhydride, allylamine and hydroxymethyl dimethyl phosphite. The application introduces amide groups and phosphite groups into the molecular chain of maleic anhydride, uses the groups as coordination compounds to coordinate with vinyl siloxane and platinum, and can improve the normal-temperature storage stability of the platinum catalyst while still keeping high catalytic activity of the platinum catalyst on the hydrosilylation reaction; when the platinum complex is used for catalyzing preparation of addition-type liquid silicone rubber, no inhibitor needs to be added, and the silicone rubber has good mechanical properties.

The utility model relates to the technical field of vinylpyridine production, and discloses a packaging device for vinylpyridine production, which comprises a working table, a support is fixedly connected to the upper surface of the working table, a storage seat is arranged in the middle of the working table, a storage bin is fixedly connected to the top of the support, and the storage bin is fixedly connected to the lower surface of the working table. An anti-overflow sleeve is fixedly connected to the lower surface of the storage bin, a quantitative valve is arranged between the storage bin and the anti-overflow sleeve, a conveying pipe is fixedly connected to the output end of the quantitative valve, and a triangular inclined plate is fixedly connected to the bottom of the anti-overflow sleeve. In the utility model, the sealing structure among the tank opening, the triangular inclined plate and the conveying pipe plays a key role, and the movement of the packaging tank enables the spring I to contract to generate thrust, so that the sealing plate is tightly attached to the tank opening, raw materials can be effectively prevented from overflowing, the canning process is ensured to be clean and tidy, and the waste of the raw materials is reduced; and by adopting the mode of filling from the tank bottom to the top, the problem that bubbles are generated due to raw material filling can be avoided, the canning quality is guaranteed, and the product quality is improved.

The invention discloses an application of a metabolome biomarker in a biological sample in preparation of a Parkinson's disease detection product, and the metabolome biomarker is selected from one or a combination of more than two of DL-alanyl-DL-methionine, p-menthane-1, 3, 8-triene and 4-vinyl guaiacol. Experimental results of the applicant show that the three metabolites are singly used or combined for diagnosis of the Parkinson's disease and have high capability and prediction accuracy, when the three metabolites are combined for use, the AUC value is up to 0.983, the sensitivity is 95.24%, the specificity is 94.12%, the CI is 0.923-0.999, and the Parkinson's disease can be predicted more reliably and accurately.

The application discloses application of a divinyl tetrazine in cyclization of a linear polypeptide, and a structure formula of the divinyl tetrazine is; the linear polypeptide has at least two free mercapto groups, and the vinyl groups of the divinyl tetrazine are subjected to Michael addition reaction with corresponding mercapto groups to form a ring. The application provides a new use of the divinyl tetrazine, the divinyl tetrazine can be subjected to high-efficiency Michael addition reaction with two natural cysteine mercapto groups on the linear polypeptide through the vinyl groups, so that double-mercapto peg cyclization of the linear polypeptide is realized, and the purpose of limiting the conformation of the linear polypeptide and improving the stability of the linear polypeptide is achieved. Moreover, the divinyl tetrazine can be subjected to a reverse electron demand Diels-Alder reaction with trans-cyclooctene (TCO) after the two vinyl groups are subjected to reaction with mercapto groups, so that functional polypeptides can be modularly constructed by coupling with functional molecules modified with TCO, and related applications are realized.

The present invention belongs to the technical field of organic chemical synthesis and discloses a method for preparing asymmetric ketone compounds. This invention, for the first time, achieves the denitrogenation and decarboxylation coupling of vinyl azide with alkyl carboxylates / Katritz salts in the absence of a photocatalyst, filling a gap in the prior art. The method of the present invention features mild process conditions, a short flow, simple steps, and a wide range of substrate applicability, meeting industrial production requirements. Research has found that the product yield can reach as high as 88%, and the resulting ketone compounds have broad application prospects in organic synthesis and drug development. Therefore, the present invention has significant application value.

The present application relates to a kind of monodisperse core-shell type hybrid silica microspheres containing vinyl shell and its preparation and application. Specifically, using "two-phase method" strategy, monodisperse solid silica microspheres are used as matrix, vinyl triethoxysilane and tetraethyl orthosilicate are used as raw materials, lauryl amide propyl betaine and sodium subtiliporin are used as double-template pore-forming agent, under the catalysis of urea, sol-gel reaction occurs, a layer of porous hybrid shell containing vinyl functional group is constructed on the surface of solid silica microspheres, and core-shell type silica hybrid microspheres are formed. Because the shell contains a large number of vinyl functional groups, after hydrophilic modification with captopril, it is used as the adsorbent of hydrophilic interaction chromatography, and is applied to the selective enrichment of biological samples. The core-shell type silica hybrid microspheres prepared in the present application have uniform morphology, good monodispersity, and rich vinyl functional groups on the surface, which are easy to modify and apply subsequently.

This invention belongs to the field of organic synthesis technology and relates to a precursor of an obisec key intermediate and a method for preparing the key intermediate. The method involves a [4+2] cycloaddition reaction of 4-trifluoromethylaniline, propionaldehyde, and N-vinylformamide under the catalysis of chiral phosphoric acid, yielding the obisec key intermediate precursor with high enantioselectivity. N -((2) R 4 S )-2-ethyl-6-trifluoromethyl-1,2,3,4-tetrahydroquinoline-4-yl)formamide; subsequently, the key intermediate of obisetri can be obtained through a deprotection reaction under acidic conditions. The method provided by this invention uses a small amount of chiral catalyst and commercially available reagents to efficiently obtain the key intermediate of obisetri in just two steps. R 4 S )-2-ethyl-6-trifluoromethyl-1,2,3,4-tetrahydroquinoline-4-amine; under mild conditions without the need for chiral resolution, the utilization of starting materials is greatly improved, thereby significantly increasing the yield of the target product and the economic efficiency of the process.

The invention relates to a drug-loading material containing modified sodium alginate and application of the drug-loading material in pesticide preparations, and belongs to the technical field of pesticide pharmacy, the drug-loading material containing modified sodium alginate contains an N-vinyl caprolactam chain segment, the volume phase transition temperature of the drug-loading material can be regulated and controlled through the concentration of metal ions, and the temperature-sensitive chain segment collapses at high temperature, so that the drug-loading material containing modified sodium alginate has good stability. At low temperature, the network is loose to promote release, at low temperature, the network is compact, ineffective release is inhibited, temperature fluctuation in the field is adapted, metal ions, carboxyl of modified sodium alginate, carboxyl of dehydroabietic acid and acylamino of N-vinylcaprolactam form a dynamic coordination network, accurate gradient release is presented in weak-acid, neutral and alkaline environments, and the metal ion-modified hydrogel has good biocompatibility. Amino and carboxyl of the chitosan quaternary ammonium salt form an acid-base buffer pair, the pH response interval is further refined, release disorder caused by small fluctuation of soil acidity and alkalinity is avoided, the drug-loading material has a temperature and pH dual response function, and targeted release in a pest and disease damage high-incidence environment (high temperature and specific pH) is achieved.

The invention discloses an isolongifolanone-based fluorescent probe for detecting hydrazine as well as a preparation method and application of the isolongifolanone-based fluorescent probe. Isolongifolanone is used as a raw material and is subjected to condensation with 2-amino-4 '-bromobenzophenone, the condensation product and 4-hydroxyphenylboronic acid are subjected to Suzuki coupling, the coupling product and urotropine are subjected to formylation, the formylation product and 1-bromobutane are etherified, and the isolongifolanone derivative is obtained. The preparation method comprises the following steps: reacting 2-(2-(4-butoxy-4 '-(1, 1, 5, 5-tetramethyl-1, 3, 4, 5, 6, 12b-hexahydro-2H-2, 4a-arbor methyl benzacridine-7-yl)-[1, 1'-biphenyl]-3-yl) vinyl)-3-ethyl-benzothiazole-3-onium (abbreviated as ABP-BBT) by using 2-(2-(4-butoxy-4 '-(1, 1, 5, 5-tetramethyl-1, 3, 4, 5, 6, 12b-hexahydro-2H-2, 4a-arbor methyl benzacridine-7-yl)-1, 1'-biphenyl)-1, 2, 4, 5-tetramethyl-1, 3, 4, 5 The compound ABP-BBT can specifically recognize hydrazine, the detection limit of hydrazine reaches 7.5 nM, and the compound ABP-BBT has a good application prospect.

The invention provides a tetravinyl benzyl indene derivative, a preparation method of the tetravinyl benzyl indene derivative, tetravinyl benzyl indene derivative thermosetting hydrocarbon resin and application of the tetravinyl benzyl indene derivative thermosetting hydrocarbon resin, and relates to the technical field of thermosetting resin. The tetravinyl benzyl indene derivative provided by the invention contains four vinyl groups, the crosslinking density of the thermosetting hydrocarbon resin is high, the dielectric loss tangent and dielectric constant of the tetravinyl benzyl indene derivative thermosetting hydrocarbon resin are remarkably reduced, and the heat resistance of the tetravinyl benzyl indene derivative thermosetting hydrocarbon resin is remarkably improved. Compared with trivinyl benzyl indene hydrocarbon resin and 1, 2-bis (4-vinylphenyl) ethane hydrocarbon resin, the tetravinyl benzyl indene derivative thermosetting hydrocarbon resin provided by the invention has the advantages of lower dielectric loss tangent, higher glass transition temperature, higher thermal stability, higher thermal stability and higher thermal stability. The method has a good application prospect in preparation of high-frequency and high-speed resin, bonding sheets, metal foil-coated plates, insulating substrates, resin-coated metal foils, insulating films, circuit substrates or electronic devices.