37 results about "Grafted chitosan" patented technology

The invention relates to an antibacterial sanitary towel containing traditional Chinese medicinal materials. The antibacterial sanitary towel containing the traditional Chinese medicinal materials structurally and sequentially comprises a soft cotton layer, a modified bamboo fiber layer, a traditional Chinese medicine extract layer, an absorption layer and a bottom layer. Wherein the modified bamboo fiber is obtained by reacting a reaction product of oxidized bamboo fiber and chitosan with polydopamine. Firstly, sodium periodate is utilized to oxidize bamboo fibers to introduce aldehyde groups, then chitosan is grafted, and finally the chitosan reacts with polydopamine to form a three-dimensional network structure, so that the antibacterial property of the sanitary napkin is remarkably improved. Meanwhile, the traditional Chinese medicine extract is loaded on the PP non-woven fabric. The instant antibacterial effect of the modified bamboo fiber and the slow-release antibacterial effect of the traditional Chinese medicine extract are combined, and the synergistic antibacterial effect is achieved; due to the unique structural design, the sanitary towel has the advantages of rapid flow guide, lasting bacteriostasis and skin safety, and the use performance and comfort of the sanitary towel are comprehensively improved.

The invention relates to a composite acidifying agent for improving feed intake of lactating sows and a preparation method thereof, and belongs to the technical field of feed additives. The composite acidifier comprises a wall material and a core material, wherein the wall material comprises cystine-gamma-polyglutamic acid and arginine-chitosan; the core material comprises organic acid, organic acid salt and fermentation liquor. According to the compound acidifying agent disclosed by the invention, the cystine cross-linked gamma-polyglutamic acid and the arginine grafted chitosan are used as wall materials, and the microcapsule with an intestinal targeted release function is formed by wrapping the organic acid, so that the utilization efficiency of the acidifying agent and the feed intake of lactating sows can be effectively improved.

The invention belongs to the technical field of adhesive materials, and particularly relates to a modified starch-based water-based adhesive as well as a preparation method and application thereof. According to the adhesive, oxidized corn starch is taken as a base material, hydrophobic and weather-resistant modification is realized by introducing a fluorine-silicon-containing functional monomer, and hydroxypropyl quaternized chitosan is compounded to endow antibacterial property and a film-forming enhancement effect; a borax cross-linked polyol system is supplemented to improve the cohesive strength, and a plasticizer, a thickening agent and an emulsifier are matched to optimize the rheological property and wettability. The preparation process comprises the steps of starch gelatinization, fluorosilicone urea grafting, chitosan derivative compounding, auxiliary agent blending and the like, and the process is mild, environment-friendly and non-toxic. The obtained water-based adhesive has the characteristics of strong initial adhesion, good water resistance, moderate flexibility, excellent biocompatibility and the like, and is especially suitable for adhesion and manufacturing of ball products such as basketballs, footballs and the like.

A method for preparing silkworm pupa active peptide microcapsules and their applications are disclosed. In a microfluidic focusing droplet generation chip, an aqueous phase is injected into the chip through the main channel, and an oil phase is injected through two side channels. The resulting microdroplets are collected in the collecting phase to form microcapsules. The filter membrane has a pore size of 0.1-1 μm. The aqueous phase consists of sodium alginate and silkworm pupa protein peptides; the oil phase consists of one of mineral oil, soybean oil, silkworm pupa oil, corn oil, peanut oil, rapeseed oil, and lard; the collecting phase consists of caffeic acid-grafted chitosan and calcium chloride dissolved in acetic acid. By optimizing the formulation and process, droplets with good dispersibility in oil, uniform morphology and size, and good stability are prepared.

The invention discloses an antibacterial and anti-algae PP composite board and a preparation method and application thereof.The antibacterial and anti-algae PP composite board comprises a polypropylene composite material layer, a glass fiber reinforcement layer and an antibacterial layer which are sequentially stacked, the antibacterial layer comprises antibacterial master batch, the antibacterial master batch is of a core-shell structure, a maleic anhydride grafted polypropylene resin material serves as a shell layer, and the shell layer is made of a polypropylene resin material; a mixed filler formed by quaternary ammonium salt grafted chitosan and nano zinc oxide is used as an inner core. The antibacterial and anti-algae PP composite board provided by the invention has excellent antibacterial and anti-algae capabilities, and has excellent mechanical properties and weather resistance.

The invention discloses a crown ether grafted chitosan coating film and a preparation method and application thereof.According to the coating film, chitosan serves as a base material, crown ether serves as a functional modifier, a matrix polymer serves as a coating matrix, NPOE serves as a plasticizer, and a PIM-CTS-15 coating film and a PIM-CTS-18 coating film are prepared through chitosan precursor preparation, crown ether grafting modification, film casting liquid preparation and coating forming; and the crown ether is benzo 15-crown-5 or dibenzo 18-crown-6. The invention further discloses a preparation method of the catalyst. Through the synergistic effect of specific recognition, hydrophilic regulation and structure enhancement, the coating film has high selectivity, high permeation flux and good stability on lithium ions. The membrane is simple in preparation process and easy to industrialize, can be efficiently used for lithium separation and extraction of lithium-containing waste liquid, and has remarkable economic and environmental benefits.

The invention relates to the technical field of hemostatic materials, and provides chitosan-based in-situ self-gel powder as well as a preparation method and application thereof. The chitosan-based in-situ self-gel powder provided by the invention comprises modified chitosan-based powder and oxidized polysaccharide powder, the modified chitosan-based powder is prepared from poly (3-sulfopropyl methacrylate potassium salt) grafted chitosan and poly [2-(methylacryloyloxy)-ethyltrimethyl ammonium chloride] grafted chitosan. The chitosan-based in-situ self-gelling powder provided by the invention has an in-situ self-gelling function, can quickly absorb water to realize self-gelling under the triggering of body fluid or blood, has excellent wet tissue adhesion performance, is high in water absorption speed and good in hemostatic effect, is not influenced by a normal blood coagulation mechanism in a hemostatic process, and has good postoperative anti-adhesion performance; no chemical cross-linking agent is used in the preparation process of the chitosan-based in-situ self-gel powder, the chitosan-based in-situ self-gel powder has good biocompatibility and biodegradability, raw materials are easy to obtain, synthesis is simple, and the chitosan-based in-situ self-gel powder is economical and safe.

This invention relates to the field of water pollution control technology and discloses the preparation and application of modified chitosan adsorption balls. The invention involves grafting modified nano-micron high-purity composite active iron onto chitosan, then mixing it with dried and crushed sludge. The modified nano-micron high-purity composite active iron is then reacted with the chitosan to modify it. First, the surface of the nano-micron high-purity composite active iron is made to have active functional groups, and then it reacts with chitosan. At this point, the chitosan also has a dispersing effect, resulting in better performance and achieving a synergistic effect of dual phosphorus removal. This invention has low cost, simple operation, and good economic benefits.

The invention discloses an amphoteric polyether modified chitosan quaternary ammonium salt leveling agent as well as a preparation method and application thereof. The preparation method of the amphoteric polyether modified chitosan quaternary ammonium salt leveling agent comprises the following steps: dissolving chitosan in an acetic acid solution, and adding an oxidizing agent for degradation to obtain a low-molecular-weight chitosan solution; adding a cationic etherifying agent into the low-molecular-weight chitosan solution, and carrying out heating reaction under an alkaline condition to obtain a chitosan quaternary ammonium salt solution; adding epoxy-terminated polyether into the chitosan quaternary ammonium salt solution to obtain a polyether grafted chitosan quaternary ammonium salt solution; adding succinic anhydride into the polyether grafted chitosan quaternary ammonium salt solution for acylation reaction to obtain an amphoteric polyether modified chitosan quaternary ammonium salt solution; and concentrating the amphoteric polyether modified chitosan quaternary ammonium salt solution, adding water, and uniformly mixing to obtain the amphoteric polyether modified chitosan quaternary ammonium salt leveling agent. The amphoteric polyether modified chitosan quaternary ammonium salt leveling agent disclosed by the invention has excellent leveling property, retarding property and migration property in anionic dye dyeing.

The application discloses a kind of two-component modified binary polymer nanofiber array and its molecular model, preparation method and application, two-component modified binary polymer includes polyvinyl alcohol, chitosan, carbon nanotube, silver particle four components.Polyvinyl alcohol is grafted chitosan with hydrogen bond, polyethylene-chitosan is grafted carbon nanotube with covalent bond, silver particle is dispersed and supported in the gap and surface of polyethylene-chitosan-carbon nanotube nanofiber array.Polyvinyl alcohol and chitosan binary polymer have high interface affinity and stability, carbon nanotube has the function of dispersing binary polymer and electrical conductivity, silver component has electrocatalytic activity and electrical conductivity function, the two-component modified binary polymer nanofiber array obtained by the application has electrocatalytic reduction hydrogen peroxide, is applied to the construction of electrochemical sensor, realizes the high sensitivity and high stability detection hydrogen peroxide performance.

The invention relates to a bacterial cellulose capsule. The bacterial cellulose capsule is prepared from the following raw materials: a fermented fiber beverage, a konjac glucomannan solution and a gallic acid grafted chitosan oligosaccharide solution, in the fermented fiber beverage, the concentration of bacterial cellulose is 0.5-1.5 g / mL; the bacterial cellulose is obtained by fermenting and purifying gluconacetobacter xylinum and foal bacillus; in the konjac glucomannan solution, the concentration of konjac glucomannan is 5 to 15 mg / mL; in the gallic acid grafted chitosan oligosaccharide solution, the concentration of gallic acid grafted chitosan oligosaccharide is 5 to 15 mg / mL. The swelling ratio of the capsule is gt; the structural integrity can be maintained after water absorption and expansion, and the fiber suspension can be gradually dispersed into the fiber suspension at proper time and can be conveniently discharged out of the body.

This invention discloses an injectable bone repair material and its preparation method, belonging to the field of biomaterials technology. The material is composed of grafted chitosan obtained by reacting N-formylglycine, allyl lactate, and S-allyl cysteine ​​with chitosan. The grafted chitosan, methacrylamide gelatin, and icariin-naringenin liposomes are then photocured to form a stable three-dimensional interpenetrating network hydrogel. The preparation method includes: first synthesizing grafted chitosan, then preparing icariin-naringenin liposomes, and finally mixing the grafted chitosan solution, methacrylamide gelatin solution, and liposomes, adding a photoinitiator, and then ultrasonically degassing and ultraviolet curing to obtain the finished product. This material utilizes thioether bonds to achieve intelligent drug release in response to reactive oxygen species, and liposome encapsulation improves drug utilization. The dual-network structure endows it with excellent injectability, mechanical strength, and biocompatibility, effectively adapting to irregular bone defects and promoting bone regeneration.

The utility model relates to a wool fiber grafting chitosan reaction device which comprises a device support, the device support comprises an outer side container with an opening in the upper side, an inner side container with an opening in the upper side is rotationally assembled at the bottom of the outer side container, and a rotating sleeve rotationally matched with the bottom of the outer side container is arranged at the bottom of the inner side container. A water passing hole is formed in the container wall of the inner side container, a water inlet is formed in the top of the outer side container, a water outlet is formed in the bottom of the outer side container, a stirring shaft is rotationally assembled at the bottom of the inner side container, the lower end of the stirring shaft penetrates out of the lower side of the rotating sleeve, and a first motor in transmission connection with the penetrating-out end of the stirring shaft is arranged at the bottom of the outer side container. A second motor in transmission connection with the rotating sleeve is further arranged at the bottom of the outer side container. The device solves the technical problem that in the prior art, after the reaction time of wool and an oxidizing agent is up, the wool and the oxidizing agent cannot be rapidly separated.

The present application relates to a kind of dolasetron mesylate suppositories, it is characterized in that, component includes: dolasetron mesylate, cyclodextrin or its derivative, shell matrix, hardness regulator, gel matrix, water;The gel matrix includes polyacrylic acid derivative grafted chitosan in it.The present application uses polyacrylic acid derivative grafted chitosan and cyclodextrin to prepare dolasetron mesylate liquid gel, significantly improve the stability and bioavailability of suppository;And can achieve the purpose of quick effect and slow release long-acting simultaneously.The suppository of the present application is very convenient for old people, children or patients who cannot be administered orally, and the treatment population of the product belongs to the patient who is inconvenient to swallow.

This application discloses a method for preparing a waterproof and breathable membrane for outdoor clothing, relating to the field of clothing and apparel technology. The method includes the following steps: Step 1, spinning solution preparation: mixing and stirring a polymer resin with a solvent to prepare a spinning solution; Step 2, electrospinning: introducing the spinning solution obtained in Step 1 into an electrospinning machine, and obtaining a waterproof and breathable membrane preform through the spinning process; wherein the polymer resin includes TPU or PU, maleic anhydride-grafted chitosan and / or modified high-sodium bentonite, and phase change temperature-regulating microcapsules, and the maleic anhydride-grafted chitosan and / or modified high-sodium bentonite account for 3-12% of the mass of the polymer resin, and the phase change temperature-regulating microcapsules account for 20-42% of the mass of the polymer resin. This application achieves efficient and intelligent temperature control by combining maleic anhydride-grafted chitosan and phase change temperature-regulating microcapsules, thereby improving the compatibility of the phase change temperature-regulating microcapsules in the polymer resin and uniformly dispersing them in the polymer resin.

This invention discloses an antibacterial composite material of nano-silver / chitosan nanofiller doped with polymer and its preparation method, belonging to the field of antibacterial composite material technology. This invention modifies chitosan through amphiphilic grafting, simultaneously grafting hydrophobic segments compatible with the polymer matrix and hydrophilic groups with strong coordination ability to silver ions, forming a "molecular bridge" structure. Subsequently, the amphiphilic grafted chitosan is uniformly dispersed with plasma-pretreated polymer resin and silver precursor in a deep eutectic solvent, and nano-silver is generated by in-situ reduction, effectively solving the problems of nanoparticle aggregation and interfacial compatibility. Based on this, an antibacterial composite material with both long-lasting antibacterial effect and excellent mechanical properties is obtained through melt blending and injection molding.

The invention discloses diuron wettable powder and a preparation method thereof, and belongs to the technical field of pesticide preparations, and the diuron wettable powder is prepared from the following raw materials in parts by weight: 50-60 parts of diuron, 10-15 parts of a composite carrier, 4-6 parts of a dispersing agent, 3-5 parts of a wetting agent and the balance of modified calcium carbonate, the composite carrier is TEMPO oxidized nano cellulose cross-linked sodium alginate. In addition, a benzoic acid grafted chitosan anchoring reinforcing agent is also added, and the loading capacity and suspension stability of diuron can be further improved through the pi-pi conjugation effect of the benzoic acid grafted chitosan anchoring reinforcing agent and diuron and hydrogen bond combination of the benzoic acid grafted chitosan anchoring reinforcing agent and the carrier. The diuron wettable powder solves the problems that the solubility of diuron in water is extremely low, and a preparation has low suspension rate and is easy to flocculate and precipitate, while the diuron wettable powder prepared by the invention not only can obviously improve the dispersity and suspension stability of raw medicine particles in water, but also can effectively prevent the phenomena of flocculation, caking and precipitation in the storage and use processes, and has a good application prospect. Therefore, the pesticide application uniformity and the full exertion of the pesticide effect are ensured.

The invention relates to the field of health food, in particular to a high-stability NMNH sustained-release pellet and a preparation method thereof. The invention discloses a preparation method of a high-stability NMNH sustained-release pellet, and the stability and the sustained-release performance of NMNH are remarkably improved through the synergistic effect of a multi-layer structure design and a functional material. According to the invention, centrifugal granulation is combined with a double-layer coating technology, sodium carboxymethyl cellulose is used as a binder to prepare a mother pill, and povidone, magnesium stearate first coating slurry and second coating slurry containing amino starch, stearic acid grafted chitosan and stearic acid are sequentially sprayed; and finally, constructing a stable pH-responsive three-dimensional network structure through ionic crosslinking of sodium tripolyphosphate and covalent crosslinking of glutaraldehyde. According to the preparation process, nitrogen protection is adopted in the whole process, the activity of NMNH is guaranteed through a freeze-drying process, and the obtained pellet has excellent mechanical strength, slow-release effect and long-term stability.

The invention discloses a preparation process of a freeze-dried platelet aggregation activation reagent, and relates to the technical field of medical reagent preparation, and the preparation process comprises the following steps: (1) preparing trehalose grafted chitosan; (2) preparing phenylboronic acid-trehalose-chitosan; (3) preparing a multifunctional freeze-drying protection carrier; (4) preparing a supramolecular complex binding solution; and (5) sub-packaging the supramolecular complex binding liquid, and performing programmed freeze-drying to obtain the freeze-dried platelet aggregation activation reagent. According to the invention, an environmental response network is constructed to anchor the conformation of the active substance, and a long chain with an antioxidant group and a programmed freeze-drying technology are cooperated, so that free radicals are removed, a porous structure is maintained, and the redissolution efficiency, the biological activity and the long-term storage stability of the reagent are improved.

The invention discloses a super-hydrophilic-underwater oleophobic ceramic membrane as well as a preparation method and application thereof, and relates to the technical field of ceramic membrane preparation, a ceramic support is soaked in TiO2-SiO2-ZrO2 ternary hydrophilic sol in a certain proportion for a certain time by a soaking method, and low-temperature sintering is performed after drying so as to increase the roughness of the membrane surface and membrane pore channels to improve the hydrophilicity of the membrane, so that the super-hydrophilic-underwater oleophobic ceramic membrane is prepared. And chemically grafting a chitosan oleophobic layer through a surface coating method to prepare the super-hydrophilic-underwater oleophobic ceramic membrane. The surface of the ceramic membrane and the interiors of pore channels have super-hydrophilicity, the contact angle is 2 degrees, the surface of the ceramic membrane is endowed with underwater oleophobicity through a surface coating method of the oleophobic coating liquid, the contact angle with soybean oil underwater is 151 degrees, the ceramic membrane is prevented from being in direct contact with grease during oil-water separation, membrane layer pollution is reduced, and the running flux is improved.

The invention discloses pterostilbene hydrogel for treating dark eye circles with dual black fading and a preparation method of the pterostilbene hydrogel, and belongs to the technical field of medicines. The pterostilbene hydrogel for treating dark circles with dual black fading comprises a melanocyte targeting carrier and hydrogel, the melanocyte targeting carrier is prepared from pterostilbene, soya bean lecithin, deoxidized sodium carbonate, tween-80 and undecylenoyl phenylalanine grafted chitosan; the hydrogel is prepared from chitosan, hyaluronic acid, beta-sodium glycerophosphate and water. The double black fading pterostilbene hydrogel for treating dark circles has double black fading effects of'source inhibition 'and'result evacuation', and has strong dark circle treatment potential.

This application relates to the field of polymer material preparation technology, specifically to an antibacterial flexible core-sheath composite fiber and its preparation method. An antibacterial flexible core-sheath composite fiber includes a sheath layer and a core layer. The sheath layer raw material comprises the following components in parts by weight: 20-40 parts PE resin, 3-7 parts toughening agent, and 1-3 parts antioxidant. The core layer raw material comprises the following components in parts by weight: 8-12 parts composite antibacterial agent and 25-30 parts PET resin. The composite antibacterial agent includes gallic acid-grafted chitosan, zirconium-based metal-organic framework, and ε-polylysine-grafted sodium alginate. The antibacterial flexible core-sheath composite fiber of this application addresses the problem that existing core-sheath composite fibers cannot simultaneously achieve excellent mechanical properties such as flexibility and antibacterial properties, thus enabling the core-sheath composite fiber to possess both flexibility and long-lasting antibacterial properties.

The invention relates to the technical field of paper, in particular to softwood pulp and bamboo pulp synergistically enhanced white kraft paper and a preparation method thereof. The method comprises the following steps: carrying out enzyme pretreatment and high-pressure homogenization on bamboo pulp to prepare bamboo-based nano cellulose, and then carrying out carboxymethylation; the preparation method comprises the following steps: carrying out double graft polymerization on chitosan, 2-acrylamide-2-methylpropanesulfonic acid and dodecyl methacrylate; carboxymethylated bamboo-based nanocellulose is divided into two parts for use, one part is compounded with the double-grafted chitosan, and the other part is added into the mixed slurry to construct a first enhanced network; adding cationic starch, AKD (alkyl ketene dimer) and other wet end assistants; and finally forming the paper sheet. Through a synergistic enhancement mechanism, the tensile strength, bursting strength and sizing degree of the paper are remarkably improved, meanwhile, good whiteness and opacity are kept, and the problem that the strength is insufficient under the high bamboo pulp proportion is solved.

The present application relates to a kind of compound acidifier for improving the feed intake of lactating sow and its preparation method, belong to the technical field of feed additive.The compound acidifier includes wall material and core material, the wall material includes cystine-gamma-polyglutamic acid and arginine-chitosan;The core material includes organic acid, organic acid salt and fermentation broth.The compound acidifier of the present application uses cystine crosslinked gamma-polyglutamic acid and arginine grafted chitosan as wall material, forms microcapsule with intestinal target release function by wrapping organic acid, can effectively improve the utilization efficiency of acidifier and the feed intake of lactating sow.

The invention relates to the field of villus, in particular to multifunctional villus based on modified chitosan grafted cashmere and a preparation method of the multifunctional villus, and aims to solve the problems that existing villus is poor in antibacterial performance, the purpose of long-acting bacteriostasis is difficult to achieve, and high-end application of the villus is limited. According to the preparation method, firstly, cashmere is treated, so that the cashmere is convenient to graft and modify, then, modified chitosan is prepared, finally, the primarily treated cashmere is modified by utilizing the modified chitosan, and grafted chitosan chains can remarkably improve the antibacterial performance of cashmere fibers; meanwhile, quaternary ammonium salt groups can be fixed to cashmere in a chemical bond mode, bacterial cell membranes of bacteria making contact with the quaternary ammonium salt groups are durably destroyed through the quaternary ammonium salt groups, the efficient sterilization effect is provided, loss is not likely to happen, safety is high, and the long-acting antibacterial effect is achieved.

This invention discloses a method for preparing a chitosan-based wet strength agent containing guanidine groups. By grafting dendritic polyamide-amines and amino compounds, the number of amino groups on the grafted chitosan powder is increased, thereby increasing the guanidine content in the chitosan-based wet strength agent after reaction with cyanamide compounds. The preparation method used in this invention employs mild reaction conditions and is halogen-free throughout the process, avoiding the release of harmful substances during the reaction. This invention also discloses the prepared chitosan-based wet strength agent containing guanidine groups, which exhibits good water solubility and a positive charge content >3 mmol / g. The positive charge in the wet strength agent can strongly electrostatically adsorb the negative charge of hydroxyl groups and other groups on plant fibers. This invention further discloses the application of the chitosan-based wet strength agent containing guanidine groups in papermaking. Paper made using this wet strength agent has superior mechanical properties and antibacterial effects.

This invention belongs to the field of food packaging technology and discloses a hydroxypropyl methylcellulose-coated fruit and vegetable preservation film and its preparation method. The preservation film is composed of hydroxypropyl methylcellulose and phenolic-quaternary ammonium salt grafted chitosan, supplemented with food-grade additives such as glycerol, glyceryl monostearate, sodium citrate, talc, and potassium sorbate, forming a composite coating material with good antibacterial, moisture-barrier, and gas control capabilities. By uniformly spraying this film solution onto the surface of fruits and vegetables and drying it with low-temperature hot air, the shelf life of fruits and vegetables can be significantly extended. Experiments show that the film can effectively inhibit the growth of *Escherichia coli* and *Penicillium*, while exhibiting low water vapor and oxygen permeability, good storage stability of the film solution, and no stratification or flocculation, making it suitable for industrial applications in fruit and vegetable preservation. This invention has the advantages of safe raw materials, simple process, and stable performance, making it suitable for widespread application in the green packaging and transportation of fresh fruits and vegetables.

The invention provides a lysozyme nano sustained-release gel for female private care and a preparation method of the lysozyme nano sustained-release gel. The lysozyme nano sustained-release gel for female private care is prepared from the following raw materials: 0.8 to 2.5 percent of lysozyme-chitosan-sodium alginate nano composite microspheres, 1.0 to 3.0 percent of pH (Potential of Hydrogen) response type trehalose-lactic acid grafted chitosan, 0.8 to 1.8 percent of gel matrix, 0.2 to 0.8 percent of cross-linking agent, 0.05 to 0.3 percent of chelating agent, 5 to 14 percent of humectant, 0.5 to 1.5 percent of relieving and repairing agent, 0.1 to 0.6 percent of pH regulator and the balance of purified water. The obtained lysozyme nano sustained-release gel for protecting the female private parts has the effects of resisting bacteria for a long time, supplementing and locking water synergistically, relieving stimulation of vaginal mucosa and promoting repair of damaged mucosa, and can effectively maintain micro-ecological balance of vagina.

The application discloses a recyclable construction-deconstruction antibacterial micro-interface S 2‑ The application discloses a preparation method of a response anti-corrosion coating, which comprises the following steps: preparing a copper-containing metal organic framework HKUST-1; modifying the HKUST-1 by using ethylenediaminetetraacetic acid to obtain E-HKUST-1; preparing core-shell PMMA grafted chitosan copolymer E-HKUST-1 microspheres (PCEH-1) by using the E-HKUST-1 as a polymerization site and through a solution polymerization method; preparing a solid phase and a liquid phase of a sprayable anti-corrosion coating; and high-pressure spraying the solid phase and the liquid phase after mixing and stirring the solid phase and the liquid phase into a fluid with a concentration of 1-2 g / mL to obtain the anti-corrosion coating. The coating prepared by the method has the characteristics of recyclable construction-deconstruction antibacterial micro-interface and long-term stable anti-corrosion effect.

The application relates to the technical field of sludge dewatering treatment, and more particularly to a flocculating agent and a sludge dewatering and solidification treatment process.A flocculating agent comprises the following raw materials in parts by weight: 16-20 parts of chitin, 4-6 parts of an Aspergillus fermentation liquor, 2-3 parts of PLA-g-CS, 10-12 parts of an epoxy group quaternary ammonium salt and 8-12 parts of a calcium salt, the Aspergillus fermentation liquor contains Aspergillus niger and Aspergillus nidulans, and the PLA-g-CS is prepared from carboxyl-terminated polylactic acid grafted chitosan.The flocculating agent PLA-g-CS of the application serves as a growth carrier for Aspergillus niger and Aspergillus nidulans in the Aspergillus fermentation liquor, and chitin and quaternary ammonium salt groups are introduced at chitosan on the PLA-g-CS, so that the flocculating agent obtains stronger flocculation effect, and the flocculating agent has better biodegradability, reducing the pollution of the flocculating agent to the environment.