29 results about "Mercaptoethylamines" patented technology

The application discloses an anti-fouling cross-linking polymer fracturing fluid and a preparation method thereof, and relates to the technical field of fracturing fluids. In the preparation of the anti-fouling cross-linking polymer fracturing fluid, ethylenediamine is sequentially reacted with methyl acrylate, mercaptoethylamine and vinyl phosphoric acid to obtain an over-branched scale inhibitor; polyvinyl alcohol is reacted with (4-formylphenyl) prop-2-enate to obtain modified polyvinyl alcohol; 1-alkenylimidazole is reacted with bromododecane to obtain an alkenylimidazole salt monomer; acrylamide, acrylic acid, the alkenylimidazole salt monomer and 3-butene-1-amine are polymerized to obtain functionalized polyacrylamide; and the functionalized polyacrylamide, the functionalized polyvinyl alcohol, the over-branched scale inhibitor and deionized water are uniformly mixed to obtain the anti-fouling cross-linking polymer fracturing fluid. The anti-fouling cross-linking polymer fracturing fluid prepared by the application has the advantages of excellent anti-fouling performance, good temperature resistance and self-cross-linking.

The invention relates to a nitric oxide donor based on heparin sodium and a preparation method and application thereof, the method comprises the following steps: (1) dissolving heparin sodium in a 2-(N-morpholino) ethanesulfonic acid buffer solution, adding an activator, and carrying out a reaction to obtain a reaction solution A; (2) adding beta-mercaptoethylamine into the reaction solution A, and continuously reacting to obtain a reaction solution B; (3) dialyzing the reaction solution B to obtain a solution C; and (4) adding tert-butyl nitrite into the solution C, and reacting to obtain the heparin sodium-based nitric oxide donor. Wherein in the step (1), the activating agent is 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide or hydrochloride of the 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide. According to the prepared heparin sodium-based nitric oxide donor, the nitric oxide release time is prolonged, and the problem that the half-life period of nitric oxide is short is solved.

The invention discloses a toughened single-component epoxy adhesive and a preparation method thereof, and belongs to the technical field of epoxy adhesives. The invention relates to a toughening type single-component epoxy adhesive and a preparation method thereof. The flexible epoxy resin composition comprises the following raw material components in parts by mass: 18-20 parts of an epoxy resin base material, 21-23 parts of flexible epoxy resin, 24-26 parts of elastomer modified epoxy resin, 14-16 parts of shell-core structure rubber, 1-3 parts of a thixotropic agent, 5-7 parts of a first curing agent, 3-4 parts of a second curing agent, 3-4 parts of an accelerant, 0.3-0.5 part of a coupling agent and 5-8 parts of a heat stabilizer. Wherein the first curing agent comprises a melamine curing agent; the second curing agent is obtained by sequentially reacting 5 ', 5-diallyl-2, 2'-biphenol with phenylphosphonic dichloride and then reacting with mercaptoethylamine; the heat stabilizer is obtained by reacting fullerene with unsaturated alcohol; the material prepared by the invention has better mechanical properties and high temperature resistance.

The present application relates to a kind of heparin sodium-based nitric oxide donor and its preparation method and application, the method includes the following steps: (1) heparin sodium is dissolved in 2-(N-morpholino) ethanesulfonic acid buffer solution, adding activating agent, reaction is carried out, and reaction liquid A is obtained;(2) to reaction liquid A, continue to react to obtain reaction liquid B by adding β-mercaptoethylamine;(3) reaction liquid B is dialyzed, and solution C is obtained;(4) to solution C, nitrous acid tert-butyl ester is added, and the heparin sodium-based nitric oxide donor is obtained by reaction;Wherein, in step (1), the activating agent is 1-ethyl-3-(3-dimethylaminopropyl) carbonyl diimide or its hydrochloride salt.The heparin sodium-based nitric oxide donor prepared in the present application prolongs the release time of nitric oxide, and solves the problem of short half-life of nitric oxide.

The present application relates to the technical field of antibacterial drugs, and specifically discloses a pleuromutilin derivative and a use thereof, wherein the pleuromutilin derivative has a structure of being connected to a side chain of C14 of pleuromutilin by a mercaptoethylamine, piperazine or oxygen atom from a dihydroflavone or oxime ether derivative thereof. The present application introduces dihydroflavone (naringenin and hesperetin) and oxime ether derivatives thereof having antibacterial effects into the side chain of C14 of pleuromutilin by taking pleuromutilin as a raw material. The dihydroflavone and oxime ether derivatives thereof have great potential as an advantageous structural unit due to their unique C6-C3-C6 basic skeleton (C2 and C3 are single bonds) and extensive antibacterial activity. The dihydroflavone and oxime ether derivatives thereof are combined with pleuromutilin to synthesize a plurality of dihydroflavone pleuromutilin derivatives having excellent antibacterial activity. The present application provides a new choice for designing a new generation of pleuromutilin derivatives by a hybrid strategy, improving drug properties while improving activity, and providing an anti-infective drug.

The invention relates to the field of freeze-dried powder, and discloses collagen composite freeze-dried powder for fading lines as well as preparation and application of the collagen composite freeze-dried powder. The collagen composite freeze-dried powder comprises recombinant XVII type human collagen, a chitosan derivative, superoxide dismutase, mannitol, a plant extract, palmitoyl pentapeptide-4 and water, 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride and N-hydroxysuccinimide are used as cross-linking agents, and carboxymethyl cellulose quaternary ammonium salt and aminated chitosan are subjected to an amidation reaction, so that the chitosan derivative is prepared; the carboxymethyl cellulose quaternary ammonium salt is synthesized by reacting carboxymethyl cellulose and 3-chloro-2-hydroxypropyl trimethyl ammonium chloride in an aqueous solution; the aminated chitosan is prepared by using acryloyl chitosan prepared by reaction of acryloyl chloride and chitosan and further performing thiol-ene click reaction on the acryloyl chitosan and beta-mercaptoethylamine. The collagen composite freeze-dried powder prepared by the preparation method disclosed by the invention has good anti-wrinkle and firming effects and antibacterial performance.

The application discloses a preparation method of UV waterproof ink and relates to the technical field of UV waterproof ink. The esterification product of linoleic acid and linoleyl alcohol is used as the A-phase component of the ink, and the terminal mercapto polyethylene glycol is used as the B-phase component of the ink, the thiol-ene click reaction is used to accelerate the film forming speed of the ink under the action of ultraviolet light, the polyethylene glycol skeleton is introduced into the three-dimensional network formed after the ink is solidified in the process of ultraviolet curing, the viscosity of the ink is improved, the bonding force between the ink and the printing medium is improved, the rosemary acid and mercaptoethylamine are used to form a self-made antioxidant under the irradiation of ultraviolet light, the antioxidant is added into the ink, oxygen is efficiently captured, other components in the ink are protected, and the service life of the ink is prolonged. The UV waterproof ink prepared by the application has high ultraviolet curing rate, high waterproof performance, high temperature resistance and high oxidation resistance.

The invention discloses a preparation method of UV waterproof ink, and relates to the technical field of UV waterproof ink. An esterification product of linoleic acid and linoleyl alcohol is used as an A-phase component of the ink, mercapto-terminated polyethylene glycol is used as a B-phase component of the ink, the film-forming speed of the ink under the action of ultraviolet light is increased by utilizing a thiol-ene click reaction, and a polyethylene glycol skeleton introduced into the structure has a good film-forming effect. In the ultraviolet curing process, the photoinitiator is connected into a three-dimensional network formed after the ink is cured, the viscosity of the ink is improved, the binding force between the ink and a printing medium is improved, rosmarinic acid and mercaptoethylamine are used for forming a self-made antioxidant under ultraviolet irradiation, the self-made antioxidant is added into the ink, oxygen is efficiently captured, other components in the ink are protected, and the ink has the advantages of being environmentally friendly and free of toxic and side effects. The service life of ink is prolonged. The prepared UV waterproof ink is high in ultraviolet curing rate, waterproof, temperature-resistant and high in oxidation resistance.

The present application relates to the technical field of solar cells, in particular to a buried bottom modification material for flexible perovskite solar cells and a preparation method and application thereof, wherein polyacrylic acid and its derivatives and mercaptoethylamine or its analogues are used as main reaction raw materials, a buried bottom modification material containing mercapto is generated through cross-linking reaction, the buried bottom modification material is spin-coated on a hole transport layer to prepare a buried bottom interface layer, and a flexible perovskite solar cell containing the buried bottom interface layer is prepared based on the buried bottom interface layer. The present application uses the above-mentioned buried bottom modification material for flexible perovskite solar cells and a preparation method and application thereof, and uses the polymer containing mercapto as the buried bottom modification material in the transverse flexible perovskite solar cell, so that the efficiency and mechanical stability of the flexible perovskite solar cell are improved.

The invention relates to a phosphatidylcholine structure compound and a preparation method thereof, and the preparation method of the phosphatidylcholine structure compound comprises the following steps: taking hydroxyethyl methylacrylate and beta-mercaptoethylamine as raw materials, and reacting at room temperature to obtain an intermediate M1; carrying out addition reaction on the intermediate M1 and acryloyl ester to obtain an intermediate M2; the intermediate M2 and 2-chloro-2-oxo-1, 3, 2-dioxaphospholane are subjected to a reaction, and an intermediate M3 is obtained; and reacting the intermediate M3 with chain or cyclic tertiary amine to obtain the phosphatidylcholine compound. The phosphatidylcholine compound obtained by the method disclosed by the invention is simple in reaction and mild in condition, can be combined with numerous compound fragments on the market, and is rich and diversified in products. The phosphatidylcholine compound is used for delivery of wrapped nucleic acid drugs and can be selectively delivered to the spleen part.

The invention belongs to the field of medicinal chemistry, and discloses an aromatic pleuromutilin derivative with an antibacterial effect as well as a preparation method and application of the aromatic pleuromutilin derivative. The pleuromutilin is structurally modified, aromatic group modification is further increased through a reductive amination method after mercaptoethylamine is introduced into a C-14 side chain, and the structural formula of the pleuromutilin is shown in the specification. Research on an antibacterial mechanism finds that the series of derivatives can effectively interfere with expression of bacterial protein and show unique and excellent antibacterial activity, and the pleuromutilin can be applied to preparation of antibacterial agents. Compared with pleuromutilin in the prior art, most of the pleuromutilin compounds have antibacterial activity on staphylococcus aureus, escherichia coli, salmonella, micrococcus luteus and enterococcus faecalis which are common in in-vitro clinical application, hardly generate drug resistance, have stable safety and are expected to be further optimized into lead compounds of novel antibiotics.

This invention provides a composite aerogel for adsorbing Cu in water and its preparation method, belonging to the fields of new materials and energy conservation and environmental protection. The specific method is as follows: First, graphene oxide (GO) is synthesized, then molybdenum disulfide is aminated in a mercaptoethylamine solution, and a methanol solution of polyetherimide at a specific mass concentration is added to obtain MoS2-PEI. Finally, the prepared MoS2-PEI and GO are ultrasonically mixed, and the resulting product is immersed in an aqueous solution of zinc acetate dihydrate, followed by multiple growth cycles in an aqueous solution of 2-methylimidazole. This yields a ZIF-8 / MoS2-PEI / GO aerogel. This composite aerogel uses GO as a carrier and can selectively adsorb Cu, achieving efficient purification of the heavy metal Cu. This invention features low energy consumption, high separation efficiency, one-step solidification separation, and no secondary pollution, effectively avoiding the drawbacks of redundant separation operations and large waste volumes in traditional methods.

The application discloses a method for detecting L-cysteine in serum based on N and S co-doped carbon nanodots, and belongs to the field of analysis and detection. 3+ After that, carbon dot fluorescence quenching phenomenon appears, and a carbon dot-Fe 3+ mixed system is obtained. 3+ After L-cysteine is added into the carbon dot-Fe The application first uses beta-mercaptoethylamine and p-phenylenediamine as precursors to prepare carbon dots, realizes quantitative detection of L-cysteine, has low cost, high sensitivity, is suitable for on-site rapid detection, and has high practical value and popularization prospect.

The application relates to the technical field of daily chemical products, and discloses an air freshener and a preparation method thereof, the air freshener comprising deionized water, plant extract, plant essential oil, cocamide propyl betaine, propylene glycol, citric acid, modified plant skin and an auxiliary agent; the auxiliary agent is prepared by chlorination, quaternization and mercaptoethylamine graft modification of cellulose. During preparation, a water phase system is first formed, then the plant extract is dispersed, subsequently the plant essential oil and a surfactant are added for emulsification, finally the modified plant skin and the auxiliary agent are added for mixing and filtration to obtain the product. The obtained air freshener can improve the dispersion stability of the plant essential oil, and can synergistically adsorb and complex odor molecules through the modified plant skin and the functionalized cellulose auxiliary agent, so that the air freshener has the advantages of good deodorizing effect, relatively long lingering fragrance, low irritation and good environmental protection.

The invention relates to the technical field of antibacterial drugs, and particularly discloses a pleuromutilin derivative and application thereof, and the pleuromutilin derivative is structurally characterized in that flavanone or an oximido / oxime ether derivative of flavanone is connected to a side chain of pleuromutilin C14 through mercaptoethylamine, piperazine or an oxygen atom. According to the invention, pleuromutilin is taken as a raw material, flavanone (naringenin and hesperetin) with an antibacterial effect and an oximido / oxime ether derivative thereof are introduced into a pleuromutilin C14 side chain, and the flavanone and the oximido / oxime ether derivative thereof show huge potential as a dominant structural unit due to a specific C6-C3-C6 basic skeleton (C2 and C3 sites are single bonds) and wide antibacterial activity; the flavonoid compound is combined with pleuromutilin to synthesize a plurality of dihydroflavonoid pleuromutilin derivatives with excellent antibacterial activity, and a new choice is provided for designing a new generation of pleuromutilin derivatives through a hybridization strategy, improving the drug characteristics of the pleuromutilin derivatives while improving the activity and anti-infection drugs of the pleuromutilin derivatives.

This invention provides a triple-responsive hydrogel, which is prepared by mixing the following raw materials: FeCO-PBA, tannic acid, carboxymethyl chitosan, terephthalic acid, and a first solvent; wherein, the FeCO-PBA is Fe3(CO). 12 The invention relates to a complex formed by a metal coordination reaction between 4-carboxyphenylboronic acid-SH and iron-containing carbonyl units and phenylboronic acid groups, wherein the iron-carbonyl units and phenylboronic acid groups are linked by iron-sulfur bonds; 4-carboxyphenylboronic acid-SH is a thiol-containing 4-carboxyphenylboronic acid derivative formed by the amide bond linking 4-carboxyphenylboronic acid and mercaptoethylamine. In the hydrogel of this invention, FeCO-PBA can release CO gas in response to ROS, and the dynamic covalent bonds of catechol-boronic acid esters can rapidly break down in response to high glucose, high ROS, and slightly acidic environments, promoting hydrogel degradation, thus forming a triple response mechanism targeting the microenvironment of diabetic wounds. This invention improves the safety of CO gas molecule use and maximizes therapeutic efficacy through intelligent targeting and on-demand drug delivery.

The invention belongs to the field of adsorbents, and particularly relates to a preparation method of a high-selectivity bromide ion selective adsorbent, which comprises the following steps: dissolving zircon salt, 2, 5-dihydroxy and phthalic acid, and reacting with glacial acetic acid to obtain a precursor; the precursor is subjected to a reaction with mercaptoethylamine hydrochloride and 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride, and a sulfydryl functionalized adsorbent is obtained; carrying out protonation treatment on the sulfydryl functionalized adsorbent to obtain adsorbent particles; the preparation method comprises the following steps: doping adsorbent particles and a titanate coupling agent into combustible gel formed on the basis of ethanol, and igniting the combustible gel for firing treatment to obtain the high-selectivity bromide ion selective adsorbent. The material shows excellent selectivity and adsorption performance on low-concentration bromide ions in high-salinity brine, and has high stability, regeneration capacity and excellent freeze-thaw resistance.

The application relates to the field of power pipes, and discloses an impact-resistant MPP power pipe and a preparation method thereof, which comprises the following steps: stirring polypropylene resin, modified Zn-Ti hydrotalcite, an impact-resistant modifier, ammonium polyphosphate and an additive to obtain a mixture, and then extruding the mixture into a pipe in a double-screw extruder; the modified Zn-Ti hydrotalcite is prepared by grafting mercapto-rosin acid prepared by the reaction of rosin acid and mercaptoethylamine on the surface of Zn-Ti hydrotalcite coated with polydopamine; the impact-resistant modifier is prepared by seed emulsion polymerization by using butyl acrylate and allyl methacrylate as core layer monomers and a crosslinking agent, a double-bond modified phosphorus-containing monomer prepared by the reaction of diethyl phosphinic acid and glycidyl methacrylate, and hydroxyethyl acrylate as shell layer monomers, and grafting isocyanuric acid triglycidyl ester; the pipe prepared by the application has high tensile strength and impact strength, and simultaneously has good hydrophobic performance, ultraviolet aging resistance and flame retardation.

The invention relates to a spiro ammonium salt, a one-dimensional / two-dimensional perovskite crystal and a preparation method and application of the one-dimensional / two-dimensional perovskite crystal. Based on 3-mercaptopropylamine hydrochloride or 2-mercaptoethylamine hydrochloride, cyclohexanone or a derivative thereof is directionally converted into two spiro ammonium salts by adopting a thioketal reaction; then, based on the two spiro ammonium salts as ligand molecules, one-dimensional perovskite with a nanowire structure and a two-dimensional perovskite crystal material with a layered structure are directionally prepared, and the purpose of directionally regulating and controlling the dimension (one-dimensional or two-dimensional) of the perovskite through the ligand structure (the number of heterocycle atoms) is achieved; in addition, the one-dimensional / two-dimensional perovskite crystal material disclosed by the invention is excellent in crystal quality, obvious in characteristic absorption signal and high in PL emission intensity; the ligand molecule provided by the invention has strong qualitative expandability for one-dimensional and two-dimensional perovskite, and is beneficial to deep excavation of an influence mechanism of exciton emission in low-dimensional perovskite and design and preparation of more one-dimensional and two-dimensional perovskite with characteristic free exciton luminescence characteristics.

The invention relates to the technical field of building materials, and discloses an epoxy asphalt mixture and a preparation process thereof. The preparation method comprises the following steps: carrying out polymerization reaction on an esterification product of 1, 2-dodecanediol and acrylic acid and ethylene glycol dimercaptoacetate, carrying out end capping reaction with mercaptoethylamine to prepare a compatibilizer, and stirring and mixing the compatibilizer with matrix asphalt and other materials to finally prepare the epoxy asphalt mixture. The compatibilizer contains amido and a non-polar aliphatic carbon chain structure, the amido can react with an epoxy group of epoxy resin, and the non-polar aliphatic carbon chain structure is similar to asphalt in structure and can be well compatible with the asphalt. The difunctional compatibilizer enhances the interface bonding force of epoxy resin and asphalt, improves the tensile strength and elongation at break of the mixture, reduces the softening point difference value, and effectively improves the compatibility of epoxy resin and asphalt.

The application discloses an industrial wastewater treatment agent and a preparation method thereof, and belongs to the technical field of wastewater treatment. The preparation raw materials of the treatment agent comprise graphene oxide, N-methylpyrrolidone solution, sodium persulfate, acrylic acid, benzene sulfonamide, ethyl glyoxylate, microbial bacteria liquid, mercaptoethylamine, sodium carbonate, dimethylaminoethyl methacrylate, potassium persulfate and methylene acrylamide. The graphene oxide is modified twice by the method, the adsorbability of the graphene oxide is improved, the microorganisms are loaded on the modified graphene oxide, the microorganisms are embedded by using a pH-sensitive gel after being treated by a mercaptoethylamine-sodium carbonate mixed solution, the damage of a strong alkaline and high-concentration heavy metal environment to the microorganisms is reduced, the modified graphene oxide and the microorganisms are combined to treat wastewater, and the wastewater treatment effect is remarkably improved.

The invention relates to the technical field of multifunctional lubricants, and discloses a zinc stearate lubricant composition for polyvinyl chloride processing and a preparation process thereof, specifically, trialkyl citrate, p-hydroxybenzoic acid, mercaptoethylamine and paraformaldehyde are taken as raw materials, esterification reaction and Mannich condensation reaction are carried out, and the zinc stearate lubricant composition for polyvinyl chloride processing is obtained. The thiolated benzoxazine type citric acid trialkyl ester is prepared by adding the thiolated benzoxazine type citric acid trialkyl ester; the preparation method comprises the following steps: based on a substitution reaction mechanism, preparing functionalized chlorinated paraffin by taking thiolated benzoxazine trialkyl citrate and chlorinated paraffin as raw materials; the functional chlorinated paraffin and zinc stearate are premixed, and the zinc stearate lubricant composition is prepared through an extrusion granulation process. The zinc stearate lubricant composition prepared by the invention is used as a raw material in polyvinyl chloride processing, so that a polyvinyl chloride product prepared from the zinc stearate lubricant composition has the beneficial technical effects that the lubricating property, the plasticizing effect and the thermal stability are remarkably improved.

The invention relates to the technical field of polyester degradable plastics, and discloses a heat-resistant hydrophobic polyester composite material, a preparation method thereof and a plastic product. The preparation method of the heat-resistant hydrophobic polyester composite material comprises the following steps: reacting 1, 4-divinyl perfluorobutane with mercaptoethylamine to obtain a fluorine-containing compound, modifying the fluorine-containing compound with epichlorohydrin, and reacting the modified fluorine-containing compound with a spiro compound to obtain multifunctional diol; the preparation method comprises the following steps: by taking terephthalic acid, ethylene glycol, multifunctional diol, isosorbide, antimony trioxide, an antioxidant 1010 and triphenyl phosphate as raw materials, reacting to obtain degradable polyester; and mixing the degradable polyester, the organic modified attapulgite and the auxiliary agent, extruding and granulating to obtain the heat-resistant hydrophobic polyester composite material. The heat-resistant hydrophobic polyester composite material provided by the invention is degradable and has good mechanical properties, hydrophobic properties, heat resistance and flame retardant properties, and a plastic product obtained by processing the heat-resistant hydrophobic polyester composite material provided by the invention has excellent comprehensive properties.

The present disclosure is directed to ʟ‑Ergothioneine hemiascorbic acid, a cocrystal monohydrate form, and processes for the preparation of the cocrystal monohydrate form.

The invention discloses an anti-scale cross-linked polymer fracturing fluid and a preparation method thereof, and relates to the technical field of fracturing fluids. When the anti-scale cross-linked polymer fracturing fluid is prepared, ethylenediamine sequentially reacts with methyl acrylate, mercaptoethylamine and vinyl phosphoric acid to prepare a hyperbranched scale inhibitor; the preparation method comprises the following steps: carrying out reaction on polyvinyl alcohol and (4-formylphenyl) propyl-2-olefine acid ester to prepare modified polyvinyl alcohol; the preparation method comprises the following steps: reacting 1-alkenyl imidazole with bromododecane to prepare an alkenyl imidazole salt monomer; the preparation method comprises the following steps: polymerizing acrylamide, acrylic acid, an alkenyl imidazolium salt monomer and 3-butene-1-amine to prepare functionalized polyacrylamide; and uniformly mixing the functionalized polyacrylamide, the functionalized polyvinyl alcohol, the hyperbranched scale inhibitor and the deionized water to prepare the anti-scale cross-linked polymer fracturing fluid. The anti-scale cross-linked polymer fracturing fluid prepared by the invention has the advantages of excellent scale prevention, good temperature resistance and self-crosslinking.

The invention relates to printing ink and a preparation method thereof, and belongs to the technical field of printing ink. The printing ink is prepared from waterborne polyurethane, a pigment, an auxiliary agent and deionized water, the preparation method of the printing ink comprises the following steps: mixing the waterborne polyurethane, the pigment, the auxiliary agent and the deionized water, and grinding to obtain the printing ink. When the waterborne polyurethane is prepared, polycaprolactone glycol and isophorone diisocyanate are used as initial raw materials, preferably, 2, 2-dimethylolpropionic acid is used as a hydrophilic monomer, 1, 4-butanediol and a modified composite diol monomer are used as chain extenders, and triethylamine is used as a neutralizer; the modified composite diol monomer is a mixture obtained by co-modifying trimethylolpropane monooleate through a composite sulfydryl compound, and the composite sulfydryl compound comprises cyclohexyl mercaptan, mercaptoethylamine and benzyl mercaptan; the printing ink can be well attached to the surfaces of non-polar plastics such as PP, is high in adhesive force and excellent in adhesive property, and improves the printing effect.

The application relates to the technical field of polyester degradable plastics, and discloses a heat-resistant hydrophobic polyester composite material, a preparation method thereof and a plastic product. The preparation method of the heat-resistant hydrophobic polyester composite material comprises the following steps: 1,4-divinyl perfluorobutane is reacted with mercaptoethylamine to obtain a fluorine-containing compound, the fluorine-containing compound is modified by using epichlorohydrin, and then is reacted with a spiro compound to obtain a multifunctional diol; p-phenylenediamine, ethylene glycol, the multifunctional diol, isosorbide, antimony trioxide, antioxidant 1010 and triphenyl phosphate are used as raw materials to react to obtain a degradable polyester; the degradable polyester, organic modified attapulgite and an additive are mixed, extruded and granulated to obtain the heat-resistant hydrophobic polyester composite material. The heat-resistant hydrophobic polyester composite material is degradable, and has good mechanical properties, hydrophobic properties, heat resistance and flame retardance; the plastic product processed from the heat-resistant hydrophobic polyester composite material has excellent comprehensive performance.

The invention provides a method for biosynthesizing benzofuranone and 5-hydroxybenzofuranone. Firstly, Car is modified, CarAT is obtained and combined with phosphopantetheine enzyme sfp to construct plasmids, wild escherichia coli BW25113 serves as host bacteria, 2-hydroxyphenylacetic acid serves as a substrate, 2, 5-dihydroxyphenylacetic acid serves as a substrate, an addition experiment is conducted, and it is determined that the modified enzyme can catalyze conversion of 2-hydroxyphenylacetic acid to generate benzofuranone and can catalyze conversion of 2, 5-dihydroxyphenylacetic acid to generate 2, 5-dihydroxyphenylacetic acid. The method comprises the following steps: converting 2, 5-dihydroxyphenylacetic acid into 5-hydroxybenzofuranone, then respectively performing overexpression on corresponding genes to increase precursor flux, and constructing related plasmids in combination with 4-hydroxyphenylpyruvate dioxygenase HPPD (4-hydroxyphenylpyruvate dioxygenase) derived from streptomyces coelicolor; wherein the HPPD can be used for converting phenylpyruvic acid into 2-hydroxyphenylacetic acid and converting 4-hydroxyphenylpyruvic acid into 2, 5-dihydroxyphenylacetic acid under the assistance of Fe < 2 + >, PZE-HPPD-PheAfbr-aroGfbr and PZE-HPPD-TyrAfbr-aroGfbr are respectively combined with PCS-CarAT-sfp, then a de novo synthesis experiment is carried out by using wild escherichia coli BW25113, and the de novo synthesis of benzofuranone and 5-hydroxybenzofuranone is realized.

The invention relates to the technical field of oilfield chemistry, and discloses a carbon dioxide stimuli-responsive product and a preparation method thereof. The method comprises the following steps: (1) carrying out first reaction on polyethylene glycol diglycidyl ether and 3-amino-1, 2-propylene glycol; carrying out second reaction on a product obtained by the first reaction and mercaptoethylamine; carrying out third reaction on a product obtained by the second reaction and 2-formyl phenylboronic acid; and (2) mixing the kappa-carrageenan-containing solution subjected to the first aging, the carboxymethyl chitosan-containing solution subjected to the second aging and the product obtained in the step (1), and carrying out third aging. The carbon dioxide stimuli-responsive product is excellent in injectability, good in plugging effect and relatively good in temperature resistance.