231 results about "Carboxylation" patented technology

The invention relates to the technical field of papermaking, and particularly provides high-strength tipping base paper for cigarettes and a preparation process of the high-strength tipping base paper. The tipping paper base paper for the cigarettes comprises a fiber raw material; functionalizing the nano cellulose; a cellulase; a dry strength agent; a wet strength agent; and a sizing agent. Nano cellulose is functionalized and a synergistic stepped enhancement mechanism is constructed, so that the synergistic breakthrough of the high-strength raw tipping paper for cigarettes in the aspects of strength, wet strength and air permeability is realized; after the functionalized nanocellulose is subjected to carboxylation treatment, the hydrogen bond and electrostatic adsorption between the functionalized nanocellulose and the fiber are enhanced, and the bonding strength in a dry state and a wet state is remarkably improved; meanwhile, the wet strength agent is added in stages, and the adsorption sequence of the dry strength agent is optimized, so that the reinforcing agent constructs a stable three-dimensional network framework in the paper sheet, and the end breaking risk under high-speed winding is effectively reduced.

The invention relates to the field of oral cavities, and particularly discloses a lasting antibacterial type composite tooth socket for medicine carrying and a preparation method thereof.The lasting antibacterial type composite tooth socket comprises an adsorption layer and an antibacterial membrane layer, the adsorption layer is used for adsorbing oral cavity treatment liquid medicine, and the antibacterial membrane layer comprises a nano-silver antibacterial layer and a chitosan antibacterial layer; the preparation method comprises the following steps: mixing a tea polyphenol-polylactic acid composite solution, a nano-silver-carboxylation modified cellulose compound and a polyvinyl alcohol solution, and carrying out electrostatic spinning to prepare a nano-silver antibacterial fiber membrane, so as to form the nano-silver antibacterial layer; mixing chitosan with hot water, adding cinnamyl aldehyde, glycerol and boric acid, stirring to obtain a mixed solution, coating one side of the nano-silver antibacterial layer with the mixed solution, and curing to form a chitosan antibacterial layer; the adsorption layer is attached to the side, away from the chitosan antibacterial layer, of the nano-silver antibacterial layer, and then the lasting antibacterial type composite tooth socket for carrying the medicine is prepared through hot-pressing compounding. The drug-loaded composite tooth socket has the characteristic of further improving the antibacterial property and the antibacterial durability of the drug-loaded composite tooth socket.

The invention discloses a green construction of a porous separation membrane and an efficient uranium separation / enrichment method thereof.The method comprises the steps that firstly, mixed-dimension attapulgite clay acid etching powder is modified through phytic acid and then added into a saponin plant extracting solution, and then the mixture is mixed with a sodium alginate-chitosan double-network matrix; a film-forming solution with a high-mechanical-stability gas-liquid interface is obtained through a Pickering foam template method, and then the porous separation film is controllably constructed through cooperative strategies such as film casting, calcium cross-linking and carboxylation. Based on the advantages of a rod / sheet mixed dimension structure of minerals, synergistic interaction of plant derivatives and a spatial orientation regulation and control synergistic mechanism of functional groups, a porous separation membrane with a specific porous structure, excellent mechanical properties and uranium separation efficiency is constructed in a green manner, and the uranium separation efficiency is improved by combining optimization of membrane layer stacking and elution strategies. A high-efficiency uranium separation / enrichment method is developed, and a new normal form is provided for solving uranium pollution prevention and control and resource recovery and enrichment by a membrane separation technology.

The application relates to the technical field of fluorine-containing wastewater treatment, and discloses a MOF modified zeolite fluorine removal agent as well as a preparation method and application thereof, which comprises the following steps: subjecting natural zeolite to carboxylation or calcination pretreatment; preparing a MOF precursor; the MOF precursor is prepared from at least two kinds of rare earth metal ions in La 3+ , Ce 3+ or Zr 4+ and an organic ligand; adding the MOF precursor into a DMF solvent, then adding the pretreated natural zeolite, and ultrasonic treatment for 5-10 min; adding the obtained mixed solution into a high-pressure reaction kettle, and reacting at 160 DEG C for 24 h; after the high-pressure reaction kettle is naturally cooled, the mixed solution in the high-pressure reaction kettle is centrifuged, the precipitate is washed with DMF for 3-5 times, and then dried at 65-90 DEG C for 18-24 h, so that the MOF modified zeolite fluorine removal agent is finally obtained. The disclosed fluorine removal agent has larger pore volume and specific surface area, and has good fluorine removal effect.

The invention discloses an oxidized carbon black composite material and application of the oxidized carbon black composite material in a coating, and belongs to the technical field of carbon black material production.The oxidized carbon black composite material is subjected to a three-layer gradient design of a carboxylation inner core, a double-functional middle layer (hyperbranched and epoxy group) and a polyaniline / DBSA shell; three major breakthroughs of the prepared coating are realized: dispersibility and conductivity are compatible: the settling rate is less than or equal to 1.9% (solving agglomeration), and the resistance is less than or equal to 3.5 * 10 < 4 > omega / sq (constructing a high-efficiency conductive network); hygrothermal environment stability: the resistance change rate is less than or equal to + 9.1% (epoxy group and DBSA synergistically resist hygrothermal degradation); environment protection and waste reduction are achieved, a dispersing agent is replaced with a bio-based material (APG06), and the performance is not affected.

The invention discloses a high-wear-resistance supercritical foaming TPU material and a preparation method thereof, and relates to the technical field of high polymer materials, the material is prepared from the following components by weight: 100 parts of TPU particles, 5-20 parts of a wear-resistant filler, 3-10 parts of a compatilizer, 3-5 parts of a supercritical fluid foaming agent, 1-5 parts of a foaming promoter, 0.5-2 parts of an antioxidant and 0.5-2 parts of a lubricant; the wear-resistant filler is a compound of surface amination modified nano silicon dioxide and surface carboxylation modified polytetrafluoroethylene micro powder, the wear-resistant filler, TPU and other auxiliaries are subjected to melt blending granulation to obtain composite master batches, after the master batches are formed into sample strips, the sample strips are subjected to supercritical fluid impregnation and rapid pressure relief foaming, and the final product is obtained. Through a unique compound wear-resistant system and interface design, excellent wear resistance can still be maintained after supercritical foaming, the industrial problem that the wear resistance of a foaming material is poor is solved, the process is environment-friendly, and industrial production is easy.

The invention mainly relates to the technical field of composite material preparation, in particular to a preparation method and application of a PVDF / MOFs / GO composite membrane, and the preparation method comprises the following steps: cleaning and drying a PVDF membrane for carboxylation treatment; then immersing the PVDF membrane into a sodium hydroxide solution to obtain a carboxylated PVDF membrane; adding GO into deionized water to obtain a solution A; co (NO3) 2.6 H2O is dissolved, and a solution B is obtained; adding the solution A into the solution B, and stirring to obtain a Co < 2 + > / GO mixed solution; and filtering to the surface of the carboxylated PVDF membrane in vacuum, and immersing into a 2-methylimidazole solution to obtain the PVDF / MOFs / GO composite membrane. The compact and uniform MOFs composite material layer rapidly grows on the surface of the polyvinylidene fluoride membrane to prepare the MOFs composite membrane, and the MOFs composite membrane is used as an adsorption membrane to adsorb and separate organic matters or natural products in water, so that wastewater purification and organic matter extraction are realized.

The invention discloses a preparation method of high molecular weight waste rubber powder carboxylation modification and dynamic cross-linked rubber, and belongs to the technical field of high molecular weight waste rubber powder carboxylation modification and dynamic cross-linked rubber preparation. The preparation method comprises the following steps: S1, dispersing high-molecular-weight waste rubber powder in a solvent, adding acrylic acid and an initiator, and heating and stirring to obtain carboxylated waste rubber powder; s2, plastifying the matrix rubber on an open mill for roll coating, adding the carboxylated waste rubber powder in batches, and adding a cross-linking agent and an anti-aging agent at the same time to obtain masterbatch; s3, putting the master batch into an internal mixer, raising the temperature of the master batch to a preset dynamic crosslinking temperature, adding sulfur, an accelerant and other vulcanizing aids, and vulcanizing. Compared with the prior art, reversible chemical bonds can be formed at the interface of rubber powder particles and matrix rubber, and the chemical bonds can be temporarily broken during high-temperature processing and can be re-formed after cooling, so that the strength and the elasticity of the material are recovered.

The invention relates to the field of road asphalt, and discloses high-modulus modified asphalt for improving road performance and a preparation method thereof, the modified asphalt comprises matrix asphalt, coal liquefied asphalt, modified rubber seed oil, ethylene-vinyl acetate copolymer and modified carbon nanotubes; the modified rubber seed oil is prepared from epoxy rubber seed oil and a carboxylated flame-retardant component prepared by reaction of amino trimethylphosphonic acid, trimethylolpropane and malonic acid; the modified carbon nano tube is prepared from a toluene-2, 4-diisocyanate isocyanated carbon nano tube and an aminated modifier through a reaction; the amination modifier is prepared by performing acylating chlorination grafting on 3-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid by using thionyl chloride and then grafting with p-phenylenediamine. According to the invention, the coal liquefaction asphalt, the modified rubber seed oil, the ethylene-vinyl acetate copolymer and the modified carbon nanotube are added into the matrix asphalt; the high and low temperature performance, the flame retardant performance and the anti-aging performance of the asphalt material can be improved.

The invention relates to a method for synthesizing cyclic carbonate by catalyzing olefin oxidative carboxylation with a difunctional ionic liquid, which comprises the following steps: in a synthesis system, adding an oxidant and an additive into olefin serving as a raw material and the difunctional ionic liquid serving as a catalyst, and then carrying out epoxidation reaction; after the reaction is finished, potassium iodide and a carboxylation reagent are added into a reaction system, then cycloaddition reaction is performed, and finally cyclic carbonate can be prepared. The bifunctional ionic liquid is used as a catalyst, so that the olefin epoxidation reaction can be catalyzed, the cycloaddition reaction of an epoxide intermediate and CO2 can also be catalyzed, and the problem that a two-step reaction catalytic system is incompatible is solved. The adopted raw materials are cheap and easy to obtain, a metal-free catalyst is used, the method has the advantages of being economical and environmentally friendly, and an alternative scheme is provided for synthesis of cyclic carbonate.

The invention belongs to the technical field of tumor treatment, and particularly relates to a metal polyphenol network coated drug-loaded mesoporous organic silicon nanoparticle and a preparation method and application thereof.The mesoporous organic silicon nanoparticle (MON) is prepared through a micelle / precursor co-template assembly method, then amination modification, carboxylation modification and drug co-loading are further conducted on the mesoporous organic silicon nanoparticle (MON), and the metal polyphenol network coated drug-loaded mesoporous organic silicon nanoparticle is obtained. The DQMCTH nano-particles are prepared through the steps that DQMCTH nano-particles are taken as a raw material, a copper salt solution and a tannic acid (TA) solution are added and mixed, then a coordination complexation reaction is conducted, hyaluronic acid (HA) is added for modification, and the DQMCTH nano-particles obtained through the method are in a sphere-like shape, regular in shape, uniform in distribution and free of obvious dendritic branches and central radial pore channels. The polypeptide is effectively protected by MPN and is subjected to HA targeted modification; more importantly, the DQMCTH nanoparticles prepared by the method disclosed by the invention show pH / GSH / HAase triple sensitive drug release, and cell and animal experiment results show that the DQMCTH nanoparticles prepared by the method disclosed by the invention have relatively high anti-tumor activity on a drug-resistant breast cancer model.

The application discloses a method for synthesizing nitrogen-containing heteroarene carboxylic acid compounds based on nitrogen-containing heteroarene carbon-hydrogen bond carboxylation reaction and belongs to the technical field of organic synthesis, and specifically comprises the following steps: adding a reaction substrate, an organic catalyst, a base and an additive into a reaction container, then adding a solvent under a CO2 atmosphere, and stirring and reacting at room temperature or under heating in a light irradiation condition; and performing post-treatment on a reaction product, separating and purifying the reaction product, and obtaining nitrogen-containing heteroarene carboxylic acid compounds and derivatives thereof. The scheme has the characteristics of mild reaction condition, wide reaction substrate range, good yield and good regioselectivity, and cheap and easily-obtained raw materials, can efficiently realize nitrogen-containing heteroarene carbon-hydrogen bond carboxylation reaction, synthesize important nitrogen-containing heteroarene carboxylic acid compounds, and has a good application prospect.

The application discloses a lateral test strip for detecting C-reactive protein and application thereof, and the test strip comprises a bottom plate and a sample pad, a combination pad, a nitrocellulose membrane and a water absorption paper which are sequentially stacked on the bottom plate; the combination pad is loaded with AIE fluorescent microspheres; the AIE fluorescent microspheres are composed of P(St-MMA) microspheres coated with AIE materials after hydrolysis and carboxylation; and anti-C-reactive protein antibodies are connected to the AIE fluorescent microspheres through a covalent bond. The surface coating amount of the AIE fluorescent microspheres is increased by 1.6-2.3 times, and the fluorescence intensity per unit mass is increased by about 40-60%. The increase of the coating amount makes the density of the light-emitting core higher, the overall quantum yield is significantly improved, and the uniformity of the fluorescence signal and the detection sensitivity are enhanced. The characteristics are particularly prominent in the detection of CRP protein in the chromatographic test strip, and the detection limit can be effectively reduced, the T / C signal ratio can be improved, and the reaction time can be shortened.

This invention belongs to the technical field of carbon nanotube modification and conductive paste, specifically relating to a method for preparing polypyrrole-grafted modified carbon nanotubes and a conductive paste, including: carboxylation pretreatment of carbon nanotubes: adding carbon nanotubes to a mixed acid solution and refluxing to obtain carboxylated carbon nanotubes; pyrrole monomer grafting: dispersing the obtained carboxylated carbon nanotubes in an organic solvent, adding pyrrole monomer and a condensing agent to react, obtaining pyrrole-grafted carbon nanotubes; and in-situ polypyrrole polymerization coating: dispersing the obtained pyrrole-grafted carbon nanotubes in an aqueous solution containing a surfactant, adding an oxidant and stirring to react. The following steps are performed: Premixing and coarse dispersion: The polypyrrole-grafted modified carbon nanotubes prepared by the above method are mixed with a first solvent, and a dispersant is added and stirred to obtain a premixed slurry; cyclic grinding and gradient dilution: The obtained premixed slurry is ground and dispersed in two stages to obtain a slurry; high-pressure homogenization and dispersion: The obtained slurry is homogenized, and after homogenization, vacuum degassing is performed, and then the slurry product is filtered and collected. The carbon nanotube conductive slurry of this invention has the characteristics of high solid content, high dispersion, high conductivity, and high stability.

The application belongs to the technical field of food quality monitoring, and particularly relates to a ferric magnetic solid-phase masking agent and a quantitative detection method for lead in vegetable products. The ferric magnetic solid-phase masking agent is prepared by the following method: S1, performing carboxylation on the terminal amino group of DFO to obtain DFO-COOH; S2, coating a SiO2 layer on the surface of Fe3O4 magnetic core to obtain Fe3O4@SiO2; S3, modifying the Fe3O4@SiO2 by amination to obtain Fe3O4@SiO2-NH2; and S4, coupling Ac-DFO with Fe3O4@SiO2-NH2 to obtain Fe3O4@SiO2-DFO. The three hydroxamic acid groups of DFO are combined with Fe 3+ to form a stable chelate, and Fe 3+ can be removed through magnetic separation, the removal rate is increased to more than 99%, and the quantitative detection of lead ions is further faster and more accurate in combination with mature immunochromatography technology.

The invention relates to a preparation method of a PtGaGe alloy-loaded oxygen-doped carbon nanotube and application of the PtGaGe alloy-loaded oxygen-doped carbon nanotube in electro-catalytic oxygen reduction.The preparation method comprises the steps that firstly, the oxygen-doped carbon nanotube is prepared through a carboxylation method, and then platinum nitrate tetraammine, gallium nitrate and ammonium hexafluorogermanate are evenly mixed; the preparation method comprises the following steps: adding a PtGaGe alloy into an aqueous solution of an oxygen-doped carbon nanotube while continuously stirring, uniformly stirring at room temperature, freeze-drying, and roasting in a tubular furnace to finally realize successful loading of the PtGaGe alloy, thereby obtaining PtGaGe / OCNTs. As a novel preparation method, the trimetal alloy can be successfully prepared under the low-temperature condition, and the preparation method has the advantages of being simple in preparation process, mild in reaction condition, controllable in alloy variety and content and the like. According to the invention, the unique double p-d orbital hybridization characteristic in the ternary PtGaGe alloy is utilized, the electron structure of platinum is cooperatively regulated and controlled, the atom utilization rate and the catalytic efficiency of the ternary PtGaGe alloy are simultaneously improved, and the tradeoff relationship between activity and selectivity is successfully broken through.

The invention relates to the technical field of sealants, in particular to a weather-resistant MS sealant and a preparation method thereof. According to the sealant, silane modified polyether resin is used as a matrix, a lignin-based modifier subjected to carboxylation, polyether chain segment grafting and aromatic structure modification is adopted, the dispersity of lignin and the compatibility of polymers are improved through multi-step chemical modification, and nano calcium carbonate, a plasticizer, a coupling agent, a water removal agent, a catalyst and other optimized systems are combined, so that the mechanical property of the sealant is improved. Therefore, the sealant has excellent mechanical properties and weather resistance in extreme environments such as high temperature, high humidity, strong ultraviolet and the like. Compared with the prior art, green renewable resources are utilized, long-acting aging resistance of the sealant is achieved, environmental protection, performance and economical efficiency are considered, and the sealant is suitable for the field of sealing protection of high-requirement buildings and infrastructures.

The application relates to the technical field of acrylic resins, in particular to a high-transparency acrylic resin composition, a preparation process thereof and application of the high-transparency acrylic resin composition to photovoltaics. The high-transparency acrylic resin composition comprises a glycidyl acrylic resin, a curing agent, a plasticizer and a leveling agent, wherein the curing agent is prepared by the following method: firstly, porous nanoparticles are prepared by adopting a sol-gel method with a template agent; secondly, the porous nanoparticles are modified by carboxylation; and finally, the carboxyl-modified porous nanoparticles are grafted with a polyphenol type hindered phenolic antioxidant. In addition, a polysiloxane with a fatty ring structure and an epoxy group is introduced into the glycidyl acrylic resin. The above acrylic resin composition is not only light in quality, has high transparency, but also has good aging resistance, and is an excellent choice as a photovoltaic module packaging material.

The invention discloses a method for preparing 2, 5-furandicarboxylic acid through direct carboxylation, and belongs to the field of organic synthesis. The method comprises the following steps: firstly, preparing carbonate of alkali metal and corresponding oxide into a super-alkali catalyst, then adding 2-furancarboxylic acid alkali metal salt and ester, the super-alkali catalyst and a solvent into a reactor, and blowing out air and water vapor in a system by using dry carbon dioxide airflow; raising the temperature to 120-250 DEG C, and reacting for 2-7 hours under the stirring condition and continuous carbon dioxide gas flow; and filtering, acidifying and washing to obtain a target product. The method has the characteristics of mild reaction conditions, high yield, good color, simple process, suitability for industrial production and the like; the preparation method is economical, environment-friendly and suitable for large-scale industrial production.

The invention relates to the technical field of flame retardance of artificial boards, and discloses a method for preparing a high-flame-retardance-smoke suppression type light medium density fiberboard based on a metal ion complexing technology. The method comprises the following steps: firstly, carrying out swelling pretreatment on a wood fiber raw material by using an alkali-urea mixed solution, and then carrying out carboxylation modification to introduce a carboxyl functional group; then carrying out condensation polymerization on the carboxyl and an amine compound; anchoring metal ions on the surface of the fiber through a complexation reaction between an amine compound and metal ions such as aluminum, magnesium and calcium; and finally, carrying out heat treatment to convert metal ions into a nano metal oxide / hydroxide flame retardant in situ, and carrying out sizing, paving and hot press molding to obtain the medium density fiberboard. Through a chemical anchoring strategy of carboxylation-polycondensation-complexation-in-situ generation, molecular-level uniform dispersion and firm fixation of a flame retardant in wood fibers are realized, and the prepared board not only shows excellent flame-retardant and smoke-suppression performance, but also has enhanced mechanical properties, and has the characteristics of environmental protection and high efficiency.

A layered double hydroxide (LDH) in a heterogeneous electrocatalytic sp 2 Application of C–H activation and CO2 carboxylation. The preparation method of a cobalt-iron molybdate intercalated hydrotalcite (CoFe-Mo LDH) catalyst is as follows: the CoFe-Mo LDH is prepared by a simple coprecipitation method. The CoFe-Mo LDH is used for a heterogeneous electrocatalytic sp 2 C–H activation and CO2 carboxylation. By changing the CoFe-Mo LDH intercalation of the CoFe-Mo LDH solvent environment, a series of mono-carboxylation and di-carboxylation products can be obtained, such as: in the case of benzene as a substrate and DMF as a solvent, a mono-carboxylation product benzoic acid is obtained; in the case of benzene as a substrate and MeCN as a solvent, a di-carboxylation product isophthalic acid is obtained. For the first time, the on-demand switching of the mono-carboxylation and di-carboxylation of phenyl substrates is realized, and this research not only provides a new heterogeneous electrocatalytic strategy to achieve the carbon neutralization target, but also successfully converts cheap and easily available chemicals into high-value and carbon chain growth carboxylic acids under mild conditions.

This invention relates to the field of polyaryletherketone (PAEK) material modification technology, specifically to an ultra-low temperature resistant PAEK composite material and its preparation method, comprising the following materials: PAEK resin, polyethersulfone resin, aramid fibers with surface carboxylation pretreatment, sheet-like thermally conductive filler with a thermal conductivity of at least 400 W / m·K, and a coupling agent; this invention, through the synergistic blending modification of sheet-like thermally conductive filler with polyethersulfone (PES) microspheres and aramid fibers, achieves the advantages of high strength, high toughness, and low thermal stress in the composite material under extreme low temperature environments.

This invention discloses a natural polysaccharide-based multilayer composite encapsulated probiotic and its preparation method, relating to the field of functional food and microbial preparation technology. This invention provides metabolic substrates for the probiotics through a probiotic-prebiotic co-encapsulation core located in the innermost layer, enabling them to maintain physiological activity during encapsulation. The first anionic polysaccharide encapsulation layer uses sodium alginate, which forms a three-dimensional gel network in a calcium-ion-containing curing solution. In the acidic environment of the stomach, the carboxyl groups in the calcium alginate gel undergo carboxylation, and the network shrinks and densifies, effectively blocking the invasion of hydrogen ions and pepsin, thus physically isolating the probiotics from gastric juice. When the encapsulated probiotics enter the small intestine and colon, the chitosan in the second pH-responsive composite encapsulation layer undergoes a conformational change due to amino deprotonation. Simultaneously, phosphate and citrate ions in the outer environment exchange ions with calcium alginate, achieving a triggered release of the probiotics in the colon.

This invention provides a carboxyl-functionalized g-C3N4-supported Cu-MOF catalyst, its preparation method, and its application, belonging to the field of photocatalytic materials technology. First, a carbon nitride precursor and a carboxylating agent are mixed in a solvent to undergo a carboxylation reaction, yielding carboxylated graphitic carbon nitride. Then, the carboxylated graphitic carbon nitride is mixed with a copper salt solution for a preliminary reaction, yielding copper-supported C3N4-C powder. Finally, the copper-supported C3N4-C powder and 1,3,5-pyromellitic acid are dispersed in a solvent for a hydrothermal reaction to obtain the carboxyl-functionalized g-C3N4-supported Cu-MOF catalyst. This invention, through directional assembly and growth, ultimately obtains a composite photocatalyst with tight interfacial bonding, stable structure, and high photogenerated charge separation efficiency.

This invention provides a CNT / W 18 O 49 Cu nanofiber sea urchin material and its SERS-photocatalytic bifunctional application, wherein the material is internally embedded with carboxylated CNTs, and W 18 O 49 The nanostructures intertwine to form a three-dimensional network, and the surface of the nano-sea urchin material is composed of high-density radial nanoneedles with Cu at the tips. 2+ Anchored in an atomically dispersed form. This is achieved through carboxylation of CNTs with W... 18 O 49 Nanoneedles intertwine to form a three-dimensional network, creating a radial nanoneedle structure on the surface, with atomically dispersed Cu atoms anchored at the needle tips. 2+ It combines high-sensitivity SERS detection with efficient photocatalytic degradation, enabling integrated "detection-degradation" treatment of organic pollutants.

The invention discloses a self-lubricating PEEK-based composite material and a preparation method thereof, and belongs to the technical field of PEEK composite materials. The self-lubricating PEEK-based composite material is prepared from the following raw materials in parts by mass: 100 parts of polyether-ether-ketone resin, 10 to 15 parts of polyarylene sulfide ketone, 5 to 10 parts of polyarylene sulfide amide, 15 to 25 parts of epoxy group modified MoS2atCO-SiO2 nano material, 4 to 12 parts of modified carbon fiber and 1 to 2 parts of antioxidant. Wherein the modified carbon fiber is obtained by carrying out acylation reaction on carboxylated carbon fiber and then carrying out grafting reaction on the carboxylated carbon fiber and 2-aminodiphenyl sulfide. According to the invention, polyether-ether-ketone, polyarylene sulfide ketone and polyarylene sulfide amide are blended to form a polymer matrix of the PEEK-based composite material, and the epoxy group modified MoS2atCO-SiO2 nano material and the modified carbon fiber are used as lubricating components, so that the composite material has an excellent self-lubricating effect under the combined action.

The preparation of high-value-added aromatic carboxylic acids via CO2 carboxylation coupling through activation of the benzyl C-H bond in alcohols / amines is a green and sustainable pathway to achieve CO2 resource utilization and contribute to carbon neutrality. However, this field currently faces challenges such as poor catalyst selectivity, low CO2 activation efficiency, and a narrow substrate applicability range, making it difficult to meet practical application needs. To address this issue, this patent discovers that in a heterogeneous electrocatalytic system, cuprous selenide (V2), rich in selenium vacancies, can be used... Se -Cu 2‑x Using Se as the core catalyst, it can not only efficiently promote the synergistic activation of benzyl C-H bonds and CO2 carboxylation, significantly improving the overall catalytic activity of the reaction, but also achieve precise chemoselective carboxylation control for different types of substrates. Specifically, this V Se -Cu 2‑x Se electrocatalysts can efficiently and selectively activate the benzyl C-H bond in alcohols and subsequently induce CO2 carboxylation, exhibiting excellent chemoselectivity in the conversion of benzyl alcohol to mandelic acid and its derivatives. Simultaneously, they also demonstrate excellent catalytic performance for amines, selectively catalyzing the carboxylation of amine substrates such as benzylamine with CO2 to directionally generate phenylglycine and aromatic amine-derived carboxylates. Crucially, in addition to typical benzyl alcohol and benzylamine, the substrate applicability of this catalytic system can be extended to various alcohols and amine derivatives, realizing the carboxylation transformation from simple model substrates to diverse functional molecules, providing a new approach for the large-scale preparation of high-value-added aromatic carboxylates.

The application provides a microplastic treatment method in soil, and belongs to the technical field of microplastic treatment. The treatment method is as follows: raw biochar is prepared from agricultural straw, and then is modified by hydroxylation, magnetism and carboxylation; the obtained carboxylated biochar is double-coated by chitosan, acetic acid and sodium alginate; then the obtained double-modified biochar is activated, and a covalently immobilized composite targeting enzyme agent is fixed; the surface of the obtained covalently immobilized enzyme agent is loaded with a bacterial agent suspension by atomization spraying, and is adsorbed after standing; finally, the obtained microplastic treatment agent is applied to soil in the process of plant planting for microplastic treatment. The treatment method does not need to use harmful substances such as chemical oxidants, strong acids and strong bases, has no negative effect on soil animals and microbial communities, realizes source control, in-situ repair and long-term control of microplastic pollution, and provides stable ecological guarantee for sustainable planting of facility cucumbers.

The invention provides three-dimensional interconnected porous skeleton structure carbon aerogel as well as a preparation method and application thereof, and belongs to the technical field of electrode materials. The green deep eutectic solvent is used for cellulose modification, and efficient carboxylation can be realized under the condition that a crystal structure is not damaged, so that the dispersity and the compatibility with conductive components are improved. The MOF template is used as a sacrificial template, a porous structure is formed through induction in carbonization, and the conductivity of the material is improved through the metal center effect; a three-dimensional network is constructed by using a gelatinizing agent, so that the gel strength is improved, and the aerogel skeleton forming is ensured. According to the method, the carbon aerogel is prepared by combining carboxylation of the deep eutectic solvent, doping of the natural polymer gelatinizing agent and regulation and control of the MOF soft template, and the structure of the carbon aerogel and the electrochemical performance of the carbon aerogel in a three-electrode system are remarkably improved by utilizing the synergistic effect of the three components.

The invention discloses a preparation and detection method of a bisphenol A electrochemical sensor based on a carbon nanosphere composite material, and belongs to the technical field of functional nano composite materials and sensing. The preparation method comprises the following steps: synthesizing carbon nanospheres by a hydrothermal method, carboxylating the carbon nanospheres, performing ultrasonic treatment in a hexadecyl trimethyl ammonium bromide solution, performing electrostatic interaction to obtain a carbon nanosphere / hexadecyl trimethyl ammonium bromide compound, and dispensing compound dispersion liquid on the surface of an electrode to obtain the bisphenol A electrochemical sensor. According to the present invention, the high-conductivity carbon nanospheres, the carboxylation effect for improving the dispersibility and providing more electrochemical sites, and the hexadecyl trimethyl ammonium bromide with the strong adsorption effect are integrated, and the constructed bisphenol A electrochemical sensor has the low detection limit (0.8 nM); the electrochemical sensor constructed by the invention has the advantages of higher detection speed, wider detection range and better reproducibility, and is successfully applied to bisphenol A detection in an actual sample.