596 results about "Coupling reagent" patented technology

The present invention uses commercially available 3-aminopropylsilane coupling agent, diallylamino polyether acrylate, and an alkylating agent, or γ-propanesultone, or γ-butyrolactone as raw materials, and through an aza-Michael addition reaction and a quaternization reaction, a multifunctional silane coupling agent containing one or more quaternary ammonium cations, or sulfobetaine, or carboxybetaine in its molecular structure is prepared, which is used for the surface modification of bioactive glass, and the bioactivity, antibacterial and antifungal properties, and hydrophilicity enhancement effects after the surface modification of bioactive glass are obtained.

The invention belongs to the technical field of environmental protection, and provides a preparation method of an imine-modified functionalized mesoporous magnetic silicon dioxide nano material. The method comprises the following steps: synthesizing Fe3O4 magnetic nanoparticles in a Fe < 2 + > / Fe < 3 + > alkaline hydrolysis system through a coprecipitation method; then coating the magnetic nanoparticles with an amorphous silicon dioxide layer by taking TEOS (tetraethoxysilane) as a silicon source by adopting a sol-gel method, so as to prepare magnetic silicon coated nanoparticles; the prepared nano-particles are subjected to secondary silicon coating guided by a cetyl trimethyl ammonium bromide (CTAB) mesoporous template agent, and mesoporous magnetic silicon nano-particles are formed after calcination; and finally, carrying out surface amination modification on the mesoporous magnetic silicon nano-particles by utilizing an amino silane coupling agent, and then carrying out condensation reaction on the mesoporous magnetic silicon nano-particles and various aldehyde derivatives to construct imine bonds, so as to obtain the imine-modified functionalized mesoporous magnetic silicon dioxide nano-material. The imine-modified functionalized mesoporous magnetic silicon dioxide nano-material formed by the invention has the characteristics of efficient adsorption, rapid magnetic recovery and excellent environmental stability, and can effectively remove polystyrene micro-plastics and organic pollutants in a water body.

The invention relates to a preparation method and application of high-temperature-resistant organic modified bentonite. According to the method, three organic modifiers of long-chain quaternary ammonium salt, amide and a silane coupling agent are compounded to modify bentonite, and the problem that a single modifier is easy to decompose at high temperature is solved through the synergistic effect of physical intercalation, chemical crosslinking and interface bonding; and secondly, a three-dimensional stable structure is constructed by adding nano silicon dioxide and a composite modifier, so that the high temperature resistance and dispersion stability of the modified bentonite are further enhanced. According to the invention, the requirements of deep well and ultra-deep well drilling fluids on the temperature resistance and rheological property of the treating agent can be met, and the ultra-deep well drilling fluid which can tolerate the high temperature of 250-300 DEG C, and is low in filter loss and good in dispersion stability can be obtained.

The present invention provides a multifunctional silane coupling agent, which is prepared from commercially available 3-aminopropylsilane coupling agent, acryloxy polyetheramine, and one of an alkylating agent, polyether sulfonate, γ-propane sultone or γ-butyrolactone through Michael addition reaction and quaternization reaction. The multifunctional silane coupling agent is a new variety carrying zwitterions, quaternary ammonium cations and polyether chains, enriching the functions and application scope of silane coupling agents. It can endow some modified materials with surface hydrophilicity, conductivity, antibacterial, antifogging, antifouling, biocompatibility, anticoagulant and wet lubrication properties, etc. at the same time.

The invention provides a polyimide multilayer composite membrane material as well as a preparation method and application thereof, and belongs to the technical field of gas separation. According to the method, through collaborative design of a functional support layer, a gradient MOF layer and an ultrathin selection layer structure, the problems of support layer pore seepage, MOF agglomeration, weak interface bonding and the like in an existing composite membrane material are solved. The preparation method comprises the following steps: firstly, carrying out electrostatic spinning on a polyamide acid glue solution, and synchronously introducing dopamine by adopting a chemical imidization method to prepare a functionalized polyimide fiber membrane containing hydroxyl and amino on the surface, so that the mechanical property of a supporting layer and the MOF anchoring capability are remarkably improved; growing MOF layers with different particle sizes on the surface of the fiber membrane by regulating and controlling the concentration gradient of ligand / metal salt and the reaction time, and passivating through a silane coupling agent after each step of growth so as to avoid heterogeneous nucleation and construct a gradient structure; after the MOF gradient layer is subjected to Ar plasma pretreatment to introduce hydroxyl, the ultrathin polyamide selection layer is formed by utilizing interfacial polymerization of fluorine-containing acyl chloride and a macrocyclic amine monomer, and the ultrathin polyamide selection layer is suitable for gas separation work.

The invention relates to the technical field of wastewater treatment, in particular to a multistage composite adsorbent for treating petrochemical wastewater and a preparation method thereof.The preparation method comprises the steps that S1, plant straw powder and 3-aminopropyltriethoxysilane are subjected to a constant-temperature reaction, and aminated plant straw is obtained; s2, carrying out hydrothermal reaction on the aminated plant straw and a cerium nitrate solution to obtain functionalized plant straw; s3, the halloysite nanotubes, glutaraldehyde and the functionalized plant straw are stirred for a reaction, high-temperature carbonization is conducted after the reaction is completed, and composite biochar is obtained; s4, carrying out a reaction on the composite biochar and an amino silane coupling agent to obtain aminated composite biochar; s5, calixarene, toluene diisocynate and the aminated composite biochar are subjected to a reaction, and the multi-stage composite adsorbent is obtained. According to the technical scheme, the comprehensive adsorption capacity and removal efficiency of various organic pollutants in the petrochemical wastewater are improved, and the defect that a traditional adsorbent is poor in selectivity is overcome.

An adsorbent composition comprising: a plurality of particles of an acid-activated clay with a predetermined particle size. Each particle may have a surface comprising metal oxides or metal hydroxides and each particle may have a surface modified by coupling the metal oxides to ligands comprising amino-silane coupling agents configured to adsorb impurities. Each amino-silane coupling agents may comprise an alkoxysilane group and an amine group. The alkoxysilane group may couple to the metal oxide or metal peroxide of each particle. The adsorbent composition may comprise the amino-silane coupling agent and the acid-activated clay with a wight ratio between 2:2 and 3:1 (the acid-activated clay: the amino-silane coupling agent). The acid-activated clay may comprise a plurality of pore with a predetermined diameter formed between particles.

The invention discloses a strong-hydrophobicity chromatographic stationary phase modified by a covalent triazine skeleton containing an octyl chain as well as a preparation method and application of the strong-hydrophobicity chromatographic stationary phase. Activated silica gel is modified by utilizing a silane coupling agent, so that gamma-glycidyl ether oxypropyl trimethoxy is introduced into the surface of the silica gel; and performing in-situ growth of a covalent triazine skeleton layer containing an octyl chain through a Schiff base condensation reaction to prepare the strong-hydrophobicity chromatographic stationary phase. A covalent triazine skeleton containing a hydrophobic octyl chain in the structure is used for modifying the surface of silica gel, and a bonding phase contains a triazine ring, a benzene ring, an octyl chain and an amino group. According to the stationary phase, a hydrophobic long octyl chain is introduced into a bonding unit of CTF, so that the structure, morphology and performance of the CTF are changed, a'flower-on-sphere 'morphology is formed, and the stationary phase has a rigid porous structure, adjustable hydrophilicity / hydrophobicity, a rich pi electron system, strong hydrophobicity and good separation selectivity for non-polar compounds, and can be widely applied to separation of various samples.

The invention relates to the technical field of immobilized lipase, in particular to immobilized lipase taking modified nano SiO2 as a carrier as well as a preparation method and application of the immobilized lipase. The immobilized lipase sold in the market is high in price and poor in mechanical strength, the enzyme loss is too large due to shear force or carrier structure damage in the continuous production process, and the transesterification efficiency is poor. In order to solve the technical problems, the invention provides the immobilized lipase taking the modified nano SiO2 as the carrier, the immobilized lipase is obtained by sequentially grafting a modified nano silicon dioxide carrier with an amino silane coupling agent and an epoxy silane coupling agent and loading lipase on the surface of the modified nano silicon dioxide carrier, according to the method, the immobilized lipase forms an enzyme column in a chromatographic column and then serves as a reactor, damage of mechanical stirring to lipase particles is avoided, the ester exchange degree is more effectively controlled by adjusting the flow speed of a substrate, the production cost of an enterprise can be remarkably reduced, and the product quality is improved.

The invention belongs to the technical field of composite pipes, and relates to a polytetrafluoroethylene and soluble polytetrafluoroethylene composite pipe as well as a processing method and application thereof. The preparation method comprises the following steps: firstly, carrying out ring opening polymerization on D3F and blocking by using an amino-containing silane coupling agent to prepare amino-terminated fluorosilicone oil, and taking the amino-terminated fluorosilicone oil as a lubricating agent for compounding and processing PTFE and PFA. The amino-terminated fluorosilicone oil contains a CF3 chain segment which has excellent compatibility with PTFE or PFA, and meanwhile, the cross-linking agent is added to form a chemical bond and a cross-linked structure with amino at the tail end of the lubricant, so that the wear resistance, tensile strength, permeability resistance and high-temperature creep resistance of the PTFE and PFA composite pipe can be improved, and the PTFE and PFA composite pipe can adapt to a long-term high-temperature working environment.

The invention relates to the field of biological medicine preparation, and provides a semi-synthesis preparation method of semeglutide and a preparation method of a semeglutide side chain, the semi-synthesis preparation method comprises the following steps: 1, in the presence of a first base catalyst, mixing a compound SMG-1 solution with a compound III solution, reacting to obtain a compound IV, and filtering to obtain a compound III; wherein the addition amount of the first base catalyst is such that the pH value of the SMG-1 solution is 11.2-11.6; 2, in the presence of a coupling agent and a second base catalyst, a compound IV solution and a compound SMG-3 solution are mixed and coupled to obtain a compound V, and the pH value in the step 2 is 9.5-10.0; and 3, carrying out deprotection on the compound V by using a deprotection agent to finally obtain the semeglutide. The method provided by the invention has the advantages of few reaction steps, reduced cost, high semeglutide purity and high yield, and is suitable for large-scale industrial production.

The invention discloses a preparation method of Fe3O4 magnetic nanoparticles rich in carboxyl groups on the surface, which comprises the following steps: modifying Fe3O4 nanoparticles by using polyethylene glycol and silicon dioxide to enhance the dispersity and biocompatibility of the magnetic nanoparticles, modifying the surfaces of PEG-Fe3O4 coated SiO2 nanoparticles by using a silane coupling agent containing silane groups and unsaturated double bonds to obtain the magnetic nanoparticles rich in carboxyl groups on the surface, and modifying the magnetic nanoparticles rich in carboxyl groups on the surface by using a silane coupling agent containing silane groups and unsaturated double bonds to obtain the magnetic nanoparticles rich in carboxyl groups on the surface. Then octavinyl-POSS and double bonds on the surfaces of the nano particles are subjected to click modification to form an octahedral cage, 4-mercaptobenzoic acid and double bonds are further subjected to click modification, the surfaces of the nano particles are rich in carboxyl, and a polymer brush rich in carboxyl is constructed. Compared with a conventional streptavidin coupling method, a high-density polymer chain provides a large number of carboxyl active binding sites, so that the streptavidin coupling amount is increased, the antibody coupling rate is increased, and a solution is provided for applications such as high-sensitivity biological detection, efficient targeted drug delivery and stable immunoassay.

The invention belongs to the technical field of denitration agents, and particularly discloses a composite denitration agent for an out-of-furnace phase change process and a preparation method of the composite denitration agent. The preparation method comprises the following steps: mixing 60-80 parts of urea, 20-30 parts of a hydrolysis accelerant and 5-15 parts of amino modified zeolite to obtain the composite denitration agent for the external phase change process; the hydrolysis accelerant is coated ammonium carbamate, and the amino-modified zeolite is obtained by modifying an amino-containing silane coupling agent. The prepared composite denitration agent can promote forward proceeding of urea hydrolysis, the conversion rate of urea is increased, and the ammonia yield is increased; the amino modified zeolite can adsorb and activate urea molecules, urea decomposition is transferred to a low temperature, the activation energy of urea decomposition is remarkably reduced, and the reaction rate is increased.

The present invention discloses a transparent super-hydrophobic cultural relic protection material and a preparation method thereof. The method first grafts a hydrolyzed silane coupling agent onto the surface of silica, and then utilizes the amino group of the hydrolyzed silane coupling agent to react with the carboxyl group of a chain fatty acid to graft a chain alkyl group onto the surface of silica particles. The prepared material has excellent super-hydrophobicity, a large contact angle of water droplets on the coating surface, and a small rolling angle, making it difficult for water droplets to stay on the coating surface, thereby effectively preventing moisture penetration. At the same time, due to the transparency of the silica particles and the chain fatty acid, the coating can maintain a high transparency and will not block or change the original color and pattern of the cultural relic. The silane coupling agent acts as a bridge connecting the silica particles and the chain fatty acid, which can enhance the chemical bonding inside the coating, making the coating less prone to aging and cracking, and giving the material good high-temperature resistance and the advantage of resisting ultraviolet light, thereby extending the preservation life of the cultural relic.

The invention discloses a preparation method of PBA nanoparticle in-situ modified halloysite nanotube-polyethyleneimine cross-linked composite aerogel, which comprises the following steps: modifying halloysite nanotubes by using an epoxy silane coupling agent to obtain epoxidized HNTs, and further grafting ethylenediamine on the surfaces of the epoxidized HNTs to obtain HNTs rich in amino groups and hydroxyl groups; the preparation method comprises the following steps: respectively stirring and dissolving K4Fe (CN) 6.3 H2O and polyvinylpyrrolidone in a hydrogen chloride solution, then adding HNTs rich in amino groups and hydroxyl groups, ultrasonically dispersing uniformly, and reacting to obtain PBA-coated HNTs; the preparation method comprises the following steps: taking polyethyleneimine as a raw material, taking 1, 3-dichloropropanol as a cross-linking agent, adding an acid-binding agent, carrying out a cross-linking reaction on the polyethyleneimine and PBAatHNTs, finally freeze-drying a reaction solution, then removing the residual acid-binding agent and salts thereof by soaking and cleaning, and drying again to obtain a finished product of aerogel. According to the invention, the problems that polyethyleneimine is easy to remain in a solution and a nano-powder material is not easy to recover and reuse are solved, and the adsorption performance on heavy metal ions is improved.

The invention provides an immunomagnetic bead, a preparation method and a detection reagent. The preparation method comprises the following steps: preparing a modified magnetic bead containing a dibenzocyclooctyne group; protein and a coupling agent containing azide groups are sequentially dissolved in a second coupling buffer solution to react, modified protein containing azide groups is obtained, the final concentration of the reacted protein is 0.5-5 mg / mL, and the final concentration of the coupling agent is 0.05-5 mM; and mixing the modified magnetic beads and the modified protein according to an addition ratio of 1mg: (1-40) nmol, and reacting to obtain the immunomagnetic beads. According to the present invention, the immunomagnetic bead preparation method has advantages of high coupling efficiency, small inter-batch difference, strong specificity and difficult aggregation during the preparation process, such that the accurate detection of the antigen concentration is achieved so as to solve the defects of low coupling efficiency, large inter-batch difference and easy aggregation existing in the immunomagnetic bead preparation method in the related technology.

The invention relates to the technical field of super-hydrophobic materials, and particularly discloses a super-hydrophobic coating spraying liquid, a preparation and construction method thereof and a super-hydrophobic coating. The super-hydrophobic coating spraying liquid provided by the invention is prepared from the following components: nano SiO2 which is modified by a silane coupling agent containing amino / alkoxy and a silane coupling agent containing long fluorine chain / long-chain alkane step by step, microcapsules which are sequentially modified by the silane coupling agent containing amino / alkoxy and a dispersing agent for the second time, and a solvent which is added into the microcapsules, and a thermosetting resin. The nano SiO2 and the microcapsules which are subjected to multiple modification have good hydrophobicity, and nano metal particles loaded in the microcapsules form an anti-algae active center of the super-hydrophobic coating. And the super-hydrophobic coating prepared by using the super-hydrophobic coating spraying liquid organically combines hydrophobicity and an anti-algae active center together, so that an efficient and long-acting anti-algae effect can be realized, and the problems of short pollution flashover prevention time and poor algae removal performance of the existing super-hydrophobic coating are solved.

The invention provides an amino silicone oil softening agent and a preparation method and application thereof, the preparation method comprises the following steps: firstly, reacting alpha, omega-hydroxyl polydimethylsiloxane with an amino silane coupling agent in the presence of a catalyst to obtain active silicone oil; then reacting the obtained active silicone oil with epoxy-terminated polyether silicone oil in an organic solvent to obtain block polyether amino silicone oil; and finally, mixing the obtained block polyether amino silicon oil with an emulsifier, and then adding a pH regulator and water to successfully obtain the amino silicon oil softener. According to the preparation method, through a specific reaction path, a block polyether structure is successfully introduced into amino silicon oil, so that the obtained amino silicon oil softening agent is easy to emulsify, has excellent emulsion stability and hydrophilicity, and can remarkably improve the softness, hydrophilicity, air permeability and yellowing resistance of fabrics; and the preparation method also has the characteristics of simple process, low cost, suitability for large-scale industrial production and the like.

The invention relates to the field of composite materials, and particularly discloses a bio-based silica gel material and a preparation method thereof.The preparation method comprises the following steps that S1, an alkylated castor oil derivative is prepared, specifically, castor oil and maleic anhydride serve as raw materials to react to generate castor oil-based polycarboxylic acid ester containing double bonds, then mixing and reacting with an amino silane coupling agent to prepare an alkylated castor oil derivative; s2, mixing the alkylated castor oil derivative prepared in the step S1 with vinyl silane, 4-hydroxy-3-methoxyphenylethylamine, hermetia illucens oil, a catalyst and a pretreatment filler, and carrying out a reaction to prepare a silane group; s3, hydrolytic polycondensation: adding water into the silane group prepared in the step S2, hydrolyzing under an acidic condition to generate a colloidal silica, and drying to obtain a silica gel material; the invention further discloses the bio-based silica gel material prepared by adopting the preparation method. The bio-based silica gel material has the characteristic of preparing the bio-based silica gel material with higher mechanical property and heat resistance.

The invention provides a cyclodextrin-based nano anti-tumor medicine preparation as well as a preparation method and application thereof, and belongs to the technical field of medicines. The preparation method comprises the following steps: preparing a graphene quantum dot deposition gold nanocage modified by a silane coupling agent, carrying out a Schiff base reaction on the graphene quantum dot deposition gold nanocage and aldehyde substituted-beta-cyclodextrin to prepare a composite carrier, and coating a targeted peptide-drug compound through the reaction, thereby preparing the cyclodextrin-based nano anti-tumor drug preparation. According to the cyclodextrin-based nano anti-tumor medicine preparation prepared by the invention, the anti-tumor medicine effect is obviously improved, meanwhile, the medicine resistance of the medicine can be reversed, the damage to normal tissues is reduced, the use amount of the medicine is reduced, the side effect after the medicine is used is reduced, the compliance of a patient is improved, and meanwhile, the stability and biocompatibility of the medicine can be improved; wide application prospects are realized.

The invention discloses a hydrophobic temperature-sensitive meso-porous silicon drug delivery system and a preparation method and application thereof.The drug delivery system takes copper sulfide nanoparticles as a core and amino-modified hydrophobic meso-porous silicon dioxide as a shell, the surface is coated with a temperature-sensitive polymer PEG-p (AAm-co-AN) coat, and the hydrophobic temperature-sensitive meso-porous silicon drug delivery system is prepared. Wherein the hydrophobic mesoporous silica is prepared from a silane coupling agent A151 containing a carbon-carbon double bond and a silicon source TEOS; the drug delivery system has a photo-thermal effect and upper critical solvent temperature responsiveness, can load a large amount of hydrophobic drugs such as beta-elemene, and can realize controllable release under irradiation of 980nm near-infrared light. The phase change temperature of the delivery system is 43 DEG C, so that the combined application of photo-thermal therapy and chemotherapy can be realized while the drug release is controlled, and a more effective tumor inhibition effect is achieved. In addition, the preparation method is simple and has a wide application prospect.

The invention discloses microencapsulated perfluorohexanone as well as a preparation method and application thereof. Perfluorohexanone serving as a core material is embedded in a core part of a microcapsule; the shell layer I is formed by carrying out polymerization reaction on isophorone diisocyanate, trimethylolpropane and 1, 4-butanediol; the shell layer II is formed by interface bonding of the shell layer I subjected to surface modification through a silane coupling agent and polyurethane propionate, chemical bonding of the microcapsule and a secondary embedding layer is enhanced through modification of the silane coupling agent, PUA and nano-silica form double barriers, leakage is reduced, thermal degradation is delayed, and the microcapsule has the advantages of being good in stability, good in stability, good in stability and the like. The heat stability of the nano silicon dioxide and the mechanical strength of the PUA jointly improve the control capacity of release of the fire extinguishing agent, the steps or components are omitted, and the core functions (embedding, heat stability and fire extinguishing) of the microcapsule are remarkably reduced due to structural defects and insufficient interface bonding.

The invention discloses modified egg shell powder with a high-activity porous structure and a preparation method of the modified egg shell powder. The material is prepared by the following steps: cleaning egg shells, calcining for 15-40 minutes in an air atmosphere of 300-400 DEG C, grinding and grading, and carrying out surface modification by a silane coupling agent containing amino groups and / or epoxy groups. The BET specific surface area of the modified egg shell powder is larger than 5 m / g, and the surface water contact angle is larger than 90 degrees. Comparison experiments prove that the eggshell powder treated by the method disclosed by the invention has obviously improved surface reaction activity, a porous structure and fundamentally improved interface bonding force with a polymer matrix. The material can be used as a functional filler in the field of composite materials.

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

The invention discloses a vinyl copolymer pour point depressant as well as a preparation method and application thereof, and relates to the technical field of vinyl copolymer pour point depressants. Acrylamide, a methacrylate compound, a fumaric acid compound and alkyl coupling agent modified nano silicon dioxide are used as monomers, and the prepared copolymer pour point depressant has the characteristics and characteristic chemical bonds of copolymer macromolecules; due to the specific molecular chain and structure of the copolymer, the flexibility and flexibility variation range of copolymer molecules in the presence of dissolution or a solution is extremely large, crude oil can be quickly and effectively dispersed, the fluidity of the crude oil can be enhanced, blockage is reduced, and the oil production amount is increased; and the condensation point and the viscosity of crude oil can be obviously reduced under the condition of a very small amount (such as 500ppm).

Disclosed are a CO2 gas-soluble silicon nanofluid and a preparation method therefor. The method includes: taking nano-silica and grafting a silane coupling agent to obtain modified nano-silica; taking methylsiloxane, fluorosilicone, aminosiloxane and an end-capping agent, and performing polymerization under the action of a catalyst to obtain a functionalized network siloxane; and taking the modified nano-silica and the functionalized network siloxane, uniformly mixing, then heating for a Michael addition reaction, and obtaining the gas-soluble silicon nanofluid after the reaction is completed. The gas-soluble silicon nanofluid microscopically forms a network structure with modified nano-silica as a cross-linking point and polysiloxane as a chain; macroscopically, the effect of viscosity increase of the supercritical carbon dioxide is significant, and the dissolving pressure is low. The interfacial tension and the miscibility pressure between the crude oil and CO2 are significantly reduced.

The invention discloses a low-odor regenerated polypropylene composite material as well as a preparation method and application thereof, and belongs to the technical field of polymer composite materials. Comprising the following raw materials in parts by mass: 10-78 parts of polypropylene, 10-50 parts of regenerated polypropylene, 0-20 parts of an inorganic filler, 2-15 parts of a toughening agent, 0.5-2 parts of an isocyanate coupling agent, 1-3 parts of an odor adsorbent, 0.1-0.5 part of an initiator and 0.5-2 parts of a processing aid. By adding an isocyanate coupling agent, in the extrusion granulation process, an isocyanate group (-NCO) and hydroxyl (-OH) or amino (-NH2) or carboxyl (-COOH)-containing micromolecules remaining in regenerated polypropylene or generated in the extrusion process are subjected to an addition reaction to form urea bonds or urethane bonds, and a plurality of micromolecules are cross-linked to form a macromolecular network; the small molecules with odor are captured, so that the content of emitted substances is reduced; in addition, small molecules are further adsorbed by cooperatively utilizing an odor adsorbent, and the low-emission regenerated polypropylene composite material is prepared.

The invention discloses a microbial soil conditioner and a preparation method thereof, and relates to the technical field of soil improvement. The method comprises the following steps: culturing heavy metal-resistant chlorella and aspergillus niger to obtain a mixed bacterial suspension, combining the mixed bacterial suspension with a composite chelating modifier prepared by reacting chitosan quaternary ammonium salt, ethylenediamine tetraacetic acid and epichlorohydrin, carrying out crosslinking by using genipin to obtain a functional microbial agent, and carrying out pyrolysis and acid oxidation on corn straws as a raw material to obtain the heavy metal-resistant chlorella modified functional microbial agent. The preparation method comprises the following steps: preparing a nano zero-valent iron-biochar composite material, reducing and loading ferrous ions through sodium borohydride, preparing the nano zero-valent iron-biochar composite material, mixing the nano zero-valent iron-biochar composite material with zeolite, bentonite and a silane coupling agent, carrying out spray drying to prepare a porous carrier substance, and finally stirring and mixing an organic fertilizer complex microbial inoculant, the functional microbial inoculant and the carrier substance, and aging to prepare the soil conditioner. The prepared conditioner has a good remediation effect on soil heavy metal pollution.

The invention relates to the technical field of copper smelting, in particular to an MOF composite membrane capable of selectively adsorbing rhenium and a preparation method and application of the MOF composite membrane. The preparation method of the MOF composite membrane capable of selectively adsorbing rhenium, provided by the invention, comprises the following steps: dispersing a sulfonic acid functionalized UiO-66 type metal organic framework material in a polyvinylidene fluoride solution to obtain a metal organic framework material dispersion liquid; mixing the metal organic framework material dispersion liquid with a cross-linking agent, carrying out a cross-linking reaction, and then mixing the obtained reaction liquid with an acid-resistant ionic liquid to obtain a spinning solution; performing electrostatic spinning on the spinning solution to obtain a silk membrane; and dipping the silk membrane in an amino silane coupling agent solution, and curing to obtain the MOF composite membrane capable of selectively adsorbing rhenium. The MOF composite membrane capable of selectively adsorbing rhenium provided by the invention can selectively adsorb rhenium in waste acid treatment, so that selective separation of rhenium is realized, and meanwhile, the membrane has excellent acid tolerance.

The invention discloses an anticoagulation endothelium slow release promoting coating and a preparation method thereof, and relates to the technical field of biomedical materials, the method comprises the following steps: soaking a substrate material in a guide layer solution prepared from dopamine, a silane coupling agent containing double bonds and an amino compound; immersing in an assembly layer solution prepared from a double-bond functionalized high-molecular compound and an endothelial active promoting substance, taking out, and carrying out photo-crosslinking curing; and immersing in a regulation and control layer solution prepared from a double-bond functionalized high-molecular compound and a zwitterionic monomer, and finally taking out for photo-crosslinking and curing to obtain the anti-coagulation endothelial sustained-release promoting coating. According to the method, efficient packaging and slow release of anticoagulation and endothelialization promoting active substances are achieved, and the prepared coating remarkably improves the performance of a blood contact instrument in the aspects of acute-stage thrombus formation resistance and long-acting endothelialization promotion after implantation.