4385 results about "Sulfonic acid ester" patented technology

The invention discloses a self-assembled monomolecular layer material with an asymmetric intermediate core and a preparation method and application thereof, and belongs to the field of solar cells. The self-assembled monomolecular layer material is formed by combining an asymmetric intermediate core with anchoring groups such as phosphonic acid and sulfonic acid, has good hydrophobicity and high light transmittance, can be used as a hole transport layer material, and is used for preparing organic solar cells and perovskite solar cells with p-i-n structures, the organic solar cell achieves the maximum energy conversion efficiency of 18.9%, shows excellent environmental stability, still keeps 95% or above of the initial performance after being stored in air for 480 h, and is far superior to a traditional device based on a PEDOT: PSS interface layer. By designing and developing a series of self-assembled monomolecular layer materials with asymmetric intermediate cores, the energy conversion efficiency and environmental stability of the solar cell can be remarkably improved.

The invention relates to the technical field of drilling fluids, and discloses a lignite-based modified filtrate reducer for a drilling fluid and a preparation method of the lignite-based modified filtrate reducer. The lignite-based modified filtrate reducer for the drilling fluid is obtained by stirring and mixing the lignite grafted copolymer, the hydroxy propyl cellulose and the graphene oxide, drying and crushing. The steric effect generated by an oxazine ring, a pyridine ring, a triazine ring, a benzene ring and a pyrrole ring grafted into the lignite improves the temperature resistance and salt resistance of the filtrate reducer; the dispersing capacity of clay particles in a drilling fluid system is improved through sulfonic acid hydrated groups, and high-temperature coalescence of drilling fluid clay due to the high-temperature effect is avoided; a sulfonic acid anion group and a quaternary ammonium salt cation group are introduced into the filtrate reducer at the same time, so that the filtrate reducer can form a salt internal bond under the action of electrostatic force, and the salt resistance of the filtrate reducer is improved; the nano silicon dioxide increases the rigidity of the filtrate reducer, so that the filtrate reducer is not easy to curl under the conditions of high temperature and high salt.

The invention relates to the technical field of fracturing fluids, and discloses a preparation method of a temperature-resistant and salt-resistant fracturing fluid, which comprises the following steps: carrying out polymerization reaction on acrylamide, acrylic acid and an acrylamide sulfonic acid monomer to obtain a polymer thickening agent, and compounding the polymer thickening agent with a cross-linking agent, a clay stabilizer and the like to obtain the temperature-resistant and salt-resistant fracturing fluid. The polymer thickening agent contains long-chain alkyl, a physical cross-linked spatial network structure can be formed through a hydrophobic association effect, the hydrodynamic volume is increased, a good tackifying effect is achieved, and after high-speed shearing, the long-chain alkyl can be cross-linked again to form a spatial network structure, so that a solution still keeps very high apparent viscosity, and the viscosity of the solution is improved. Good anti-shearing performance is realized. The acrylamide sulfonic acid monomer contains a sulfonate group and is used as a temperature-resistant and salt-resistant monomer, so that the polymer thickening agent has good temperature resistance and salt resistance, and the fracturing fluid still keeps relatively high apparent viscosity after being subjected to high-temperature heat treatment and in formation water with high salinity.

The invention relates to the technical field of oilfield chemistry, and discloses a graft modified cellulose filtrate reducer and a preparation method thereof.The preparation method comprises the following steps that modified hydroxyethyl cellulose, 2-acrylamide-2-methyl propane sulfonic acid, dimethyl diallyl ammonium chloride, alkenylated cardanol and N, N '-methylene bisacrylamide are added into deionized water, stirring is conducted, and a mixture is obtained; the preparation method comprises the following steps: adding cellulose into a reaction kettle, stirring for 10-15 minutes at the temperature of 40-60 DEG C at the speed of 300-400 rpm, dropwise adding ammonium persulfate and sodium hydrogen sulfite into a system, and continuously reacting for 4-6 hours to obtain the grafted modified cellulose filtrate reducer. The filtrate reducer disclosed by the invention has good high temperature resistance and salt resistance.

The invention provides sulfonated cellulose. The sulfonated cellulose is obtained by etherifying alkalized cellulose with water-soluble halogenated sulfonate. Compared with the prior art, the sulfonated cellulose provided by the invention contains sulfonic acid groups, hydroxyl groups and other groups, so that when the sulfonated cellulose is used in the drilling fluid, the filter loss of the drilling fluid can be effectively controlled, and meanwhile, the salt pollution resistance, especially the calcium ion pollution resistance, of the drilling fluid can be improved; in addition, sulfonic groups in the product are also beneficial to improving the thermal stability of the drilling fluid, and the application range is expanded. In a word, compared with carboxymethyl cellulose for drilling fluid, sulfonated cellulose provided by the invention has obvious temperature resistance and high-valence metal ion resistance.

The invention discloses a preparation method of a degradable transparent conductive polymer film, and belongs to the technical field of film preparation. Preparing dispersion liquid I through graphene oxide quantum dots; preparing a dispersion liquid II from polyaniline nanofibers; dissolving pyrrole and toluenesulfonic acid in N, N-dimethylformamide to prepare a reaction solution, adding the dispersion liquid I and the dispersion liquid II, stirring, and adding ferric chloride hexahydrate to obtain a reaction solution; adjusting the pH value of the reaction solution to 1.5, and heating to obtain a polypyrrole solution; preparing cellulose acetate, polyvinyl alcohol and N, N-dimethylformamide to obtain a cellulose acetate solution; mixing the polypyrrole solution and the cellulose acetate solution, adding glutaraldehyde to obtain a mixed solution, and pouring the mixed solution into a mold to prepare a composite wet film; and putting the composite wet film into a hot-pressing forming machine for hot-pressing to generate the polymer film. The conductive polymer film prepared by the invention can be applied to the fields of supercapacitor electrode materials, electromagnetic shielding materials, flexible sensors and the like, and provides a new high-performance material choice for the development of related fields.

The invention relates to the technical field of lithium-sulfur batteries, and discloses a sulfonyl ZIF-8 metal organic framework material, a lithium-sulfur battery diaphragm and a preparation method of the lithium-sulfur battery diaphragm. The preparation method of the sulfonyl ZIF-8 metal organic framework material comprises the following steps: dissolving a metal precursor and a mixed ligand in an organic solvent, and carrying out a coordination reaction under the action of organic alkali; solid is collected, washed and dried, and the sulfonic group ZIF-8 metal organic framework material is obtained. The metal precursor is soluble zinc salt; the mixed ligand comprises 2-methylimidazole and an imidazole derivative containing a sulfonic acid group. The sulfo group ZIF-8 metal organic framework material is prepared through a ligand doping strategy and is used for functional modification of the lithium-sulfur battery diaphragm; the shuttle behavior of lithium polysulfide (LiPS) can be effectively inhibited through the electrostatic repulsion effect of sulfonic acid groups and the synergistic effect of high-polarity adsorption sites; and the migration of Li < + > and the conversion efficiency of LiPS are remarkably promoted by an efficient ion transmission network, so that the cycle performance of the lithium-sulfur battery is improved.

The invention relates to the technical field of low-carbon olefin hydration, and discloses a modified hydrated filler as well as a preparation method and application thereof. The modified hydrated filler comprises a filler matrix, and a silane layer, a modified layer A and a modified layer B which are sequentially coated on the outer surface of the filler matrix from inside to outside, the modified layer A contains a pyrrolyl group, an amido group and a furyl group; the modified layer B contains phenoxy, pyrrolyl, furyl, sulfonic acid group, phosphate group and acylamino. The modified hydrated filler provided by the invention can obviously improve the mixing effect of water and alkene and promote the improvement of the yield of low-carbon alcohol.

The invention discloses a single-ion conductor polymer, a ternary composite binder solution, high-solid-content sulfide electrolyte slurry and a wet film forming method and application thereof, and belongs to the technical field of all-solid-state lithium batteries. The key technical problems in the wet membrane preparation of the sulfide electrolyte are solved through an innovative solvent-binder synergistic system, and the method specifically comprises the steps that 1, through the synergistic effect of a non-polar solvent and a weak-polar solvent, low-viscosity coating of high-solid-content slurry is achieved while the chemical stability of the sulfide electrolyte is guaranteed; 2, a poly (lithium styrenesulfonate-butyl acrylate), styrene butadiene rubber and polyisobutene ternary composite binder is designed, a lithium ion transmission channel is provided through a lithium sulfonate group, a benzene ring structure in the styrene butadiene rubber enhances the mechanical strength, long-chain alkane in the polyisobutene improves the interface adhesive force, and the mechanical strength is improved; the three components cooperate to realize balance of mechanical and electrochemical properties of the electrolyte membrane, so that the prepared electrolyte membrane has low porosity, high ionic conductivity and mechanical strength.

The invention discloses a method for detecting glufosinate-ammonium residues in coffee in dual modes of colorimetry and chemiluminescence, and belongs to the technical field of chemical analysis and detection.The method comprises the steps that Schiff base formed by 4-aminoantipyrine and glutaraldehyde serves as a complexing agent of Cu < 2 + >, and then a copper-doped carbon dot Cu-CDs nano-enzyme is prepared through microwave digestion; according to the present invention, the Cu-CDs nano-enzyme has excellent peroxidase-like activity, can oxidize the colorless 2, 2 '-biazo-bis-3-ethylbenzothiazoline-6-sulfonic acid into the blue-green oxidized ABTS, and can improve the chemiluminescence intensity of the reaction of N-(4-aminobutyl)-N-ethylisoluminol and H2O2 by nearly 100 times when the Cu-CDs nano-enzyme is used as the chemiluminescence catalyst; based on the inhibition effect of glufosinate-ammonium on the activity of Cu-CDs POD, a sensitive and rapid colorimetric and chemiluminescence two-channel GM detection technology is developed, and the method has potential application value in the aspect of coffee safety monitoring.

The invention discloses a soluble alkaline salt scale inhibitor and a preparation method thereof, and belongs to the technical field of oilfield chemistry. The soluble alkaline salt scale inhibitor is prepared from amphiphilic modified graphene oxide, a surfactant, inorganic salt and deionized water, the amphiphilic modified graphene oxide contains a large amount of carboxyl groups, sulfonic acid groups, hydroxyl groups and the like, and has good metal ion chelating property; meanwhile, through the hydrophobic association effect and hydrogen-bond interaction between modified graphene grafted long carbon chains, the bonding probability between sodium ions of the soluble saline-alkali salt and bicarbonate radicals, carbonate radicals and chloride ions is further weakened, and through the synergistic effect of the amphiphilic modified graphene oxide, the surfactant and the inorganic salt, the salt scale inhibition effect is further improved; the method is especially suitable for soluble alkali salt water quality conditions of high temperature, high alkali and high salinity, can solve the problems of oilfield water injection, fracturing flowback strata and wellbore salt deposition, and has a good popularization prospect.

The invention belongs to the field of MOF (Metal Organic Framework) films, and discloses a two-dimensional metal-organic framework film composite film as well as a preparation method and application thereof. The preparation method comprises the following steps: dispersing ZIF-L nanosheets into a water phase solution containing MPD, camphor-10-sulfonic acid and TEA to obtain an MOF water phase monomer solution; adding TMC into an n-hexane reagent to obtain an organic phase monomer solution; fixing the wet PES ultrafiltration membrane, injecting the MOF water-phase monomer solution, carrying out suction filtration below the PES ultrafiltration membrane, removing the excess solution, keeping the suction filtration state, and immediately pouring the organic-phase monomer solution onto the surface of the PES ultrafiltration membrane from the upper part for reaction; and drying the obtained film at 60-80 DEG C for 10-15 minutes to obtain the two-dimensional metal-organic framework film composite film. The composite membrane has a good separation effect and can be applied to textile printing and dyeing wastewater treatment.

The invention provides high-stability ceramic ink and a preparation method thereof. The high-stability ceramic ink is prepared from the following components in parts by mass: 30 parts of inorganic pigment, 2 to 8 parts of sulfonic block polymer, 1 to 3 parts of polyvinyl alcohol grafted glycidyl methacrylate and 50 to 70 parts of organic solvent, wherein the polyving akohol grafted glycidyl methacrylate contains a plurality of epoxy groups. According to the high-stability ceramic ink, by constructing a composite system containing a sulfonic block polymer dispersing agent and polyvinyl alcohol grafted glycidyl methacrylate, stable dispersion of an inorganic pigment, construction of a thermal anchoring structure of an ink-jet pattern area and optimization of glaze layer fusion compatibility are realized; the high-stability ceramic ink effectively solves the problems of fuzzy pattern boundary and glaze-ink separation in the high-temperature sintering process of the existing ceramic ink, so that the high-stability ceramic ink has good storage stability and glaze-ink separation resistance.

The invention provides a binder, a negative pole piece and a battery, the binder comprises a polyimide binding material, the polyimide binding material comprises a first structural unit from an amino sulfonic acid monomer, a second structural unit from an amino monomer, and a third structural unit from an anhydride monomer; the mass percentage content of sulfonate radicals in the polyimide binding material is 15-35 wt%. The binder provided by the invention has a good binding effect, and is beneficial to improving the stability of the battery.

The invention relates to the technical field of all-vanadium redox flow batteries, in particular to a sulfonated polybenzimidazole proton exchange membrane as well as a preparation method and application thereof. The proton exchange membrane structurally comprises a polybenzimidazole polymer main chain and a sulfonic acid group, the free volume of the polybenzimidazole polymer is regulated and controlled by synthesizing raw materials with different structures, and the polybenzimidazole proton exchange membrane is obtained by sulfonating the polybenzimidazole polymer. Aiming at the problems of cross permeation of vanadium ion electrolyte of a positive electrode and a negative electrode of the all-vanadium redox flow battery, capacity attenuation of the all-vanadium redox flow battery and low energy conversion efficiency, the preparation method comprises the following steps: constructing a polybenzimidazole polymer main chain by selecting raw materials with high rigidity and high free volume; the mechanical property of the polybenzimidazole membrane is improved while a rapid ion channel is constructed in the polymer membrane, and water molecules can be contained to limit swelling of a membrane material.

The invention discloses a sulfonate-based electrolyte and a preparation method and application thereof, and belongs to the technical field of electrolyte preparation, the electrolyte comprises a solute, a sulfonate-based compound and a cosolvent, the mass fraction of the solute is 1-90%, the mass fraction of the sulfonate-based compound is 0.1-99%, and the mass fraction of the cosolvent is 0-99%. According to the sulfonate-based electrolyte as well as the preparation method and the application thereof, the sulfonate-based solvent is used as a main solvent, a cosolvent, an additive and the like to develop a novel electrolyte, so that the balance between strong solvation and rapid charging capability of the electrolyte is promoted, and a high-voltage battery with high energy density is developed.

The invention discloses a MOF@PS@HAC composite adsorbent, a preparation method and an application thereof. The steps include preparing hydrophobically modified activated carbon, preparing a styrene resin intermediate layer and preparing a MOF@PS@HAC composite adsorbent. The invention relates to the technical field of composite adsorbents. The MOF@PS@HAC composite adsorbent prepared by the invention has a full range of adsorption types. When the composite adsorbent contacts a mixed gas containing a plurality of AMCs, acidic gas molecules strongly interact with basic functional groups such as amino groups on the surface of MOF crystals, thereby fixing the acidic gas molecules on the surface or in the pores of the MOF material. The basic gas reacts with the sulfonic acid groups on the intermediate layer resin to generate an acid-base neutralization reaction. VOCs such as toluene continue to diffuse rapidly along the pore structure of the resin, and combine with adsorption sites on the surface of the core layer activated carbon, thereby finally achieving efficient adsorption of a plurality of AMCs.

The invention provides a metal organic sulfonic acid-based solid acid catalyst applied to nylon 6 recovery and depolymerization and a preparation method thereof, and realizes upgrading and recovery of waste nylon 6. The main contents are as follows: (1) a structural design and a preparation method of the metal organic framework sulfonic acid-based solid acid catalyst; and (2) the solid acid is used for catalytic depolymerization of nylon 6. The problems that equipment corrosion is aggravated by inorganic acid in the nylon 6 recovery process and a liquid-phase catalyst is difficult to separate and recover are solved, and the application prospect is good.

The invention discloses nano-porous aerogel based on carboxymethyl chitosan as well as a preparation method and application of the nano-porous aerogel, and belongs to the technical field of biomass-based aerogel. The aerogel is prepared from the following raw materials in parts by weight: 2.5 parts of deionized water, 0.075 part of carboxymethyl chitosan (CMC), 0.0075 to 0.0225 part of carboxylated multi-walled carbon nanotubes (C-CNT), 0.01125 part of glutaraldehyde (GA), 0.01 part of poly (3, 4-ethylenedioxythiophene)-poly (styrene sulfonic acid) (PEDOT: PSS) and 10 parts of dimethyl sulfoxide (DMSO). According to the preparation method, CM C is used as a matrix, C-CNT is used as an internal conductive material and a strength enhancing material, hydrogel is formed under the action of a cross-linking agent GA, and CMC / C-CNT aerogel is prepared through directional freeze drying; cMC / C-CNT is taken as a substrate, then PEDOT: PSS is dip-coated to obtain CMC / C-CNT / PEDOT: PSS, the CMC / C-CNT / PEDOT: PSS is taken as an external conductive substance, the CMC / C-CNT / PEDOT: PSS and internal C-CNT form a double-conductive network, aerogel with excellent conductive performance and mechanical performance is prepared, the prepared aerogel is used for preparing an aerogel sensor, and the prepared sensor has high mechanical performance and high electrical performance.

The invention provides a liposome preparation and a preparation method thereof, the liposome preparation comprises an ion pairing agent, phospholipid or a derivative thereof, sterol, a lipid molecule derivative and a drug compound, the ion pairing agent comprises at least one of a compound (I) and a compound (II), and the compound (II) comprises at least one of a compound (III) and a compound (III). Structures in the compound (I) and the compound (II) contain a plurality of functional groups (such as amide, carbonyl, thioether and the like), so that abundant binding sites are provided for drug molecules, and the compound (I) and the compound (II) can interact with different types of drug compounds (such as fat-soluble and water-soluble drugs); the liposome preparation is allowed to be combined with various drug molecules through hydrogen bonds, hydrophobic interaction or electrostatic interaction, and the liposome preparation adapts to physicochemical properties of different drugs. The compound (I) and the compound (II) further comprise different hydrophobic groups (such as alkyl chains) and hydrophilic groups (such as sulfonic acid, carboxylic acid and the like), so that the liposome preparation has the amphiphilic characteristic, not only can encapsulate hydrophobic drugs, but also can encapsulate hydrophilic drugs, and the variety and range of encapsulated drugs are improved.

The invention discloses an electrolyte, an electrochemical device comprising the electrolyte and a vehicle. The electrolyte comprises a solvent, a first additive and a second additive, the solvent comprises chain carboxylic ester, and the first additive comprises a sulfonate compound or / and a sulfate compound; the second additive comprises vinylene carbonate or / and fluoroethylene carbonate. According to the electrolyte disclosed by the invention, the chain carboxylic ester solvent, the first additive containing the sulfonate compound or / and the sulfate compound and the second additive containing the vinylene carbonate or / and the fluoroethylene carbonate are matched for use; the rapid charging capability and the high-temperature cycle performance of a lithium iron phosphate system battery with high safety performance can be improved, and the application of lithium iron phosphate in a power battery is further widened.

The invention discloses a polybenzimidazole modified ion exchange membrane as well as preparation and application thereof. The polybenzimidazole modified ion exchange membrane comprises a polybenzimidazole-containing porous base membrane, the surface of the porous base membrane is grafted with a sulfonic acid modified layer, and the outer surface of the sulfonic acid modified layer is coated with an aluminum fluoride layer. The preparation method of the membrane comprises the following steps: immersing a polybenzimidazole-based membrane into an ammonium acetate aqueous solution for reaction, taking out the base membrane after the reaction, and drying to obtain a pretreated base membrane; immersing the pretreated base membrane into a sulfonic acid group grafting solution, heating for reaction, cleaning the base membrane after the reaction, and drying to obtain a sulfonic acid modified base membrane; and immersing the sulfonic acid modified base membrane into an ethanol solution of aluminum fluoride for reaction, taking out the membrane after the reaction, cleaning and drying to obtain the membrane. The membrane can be used for assembling a flow battery. According to the invention, the problem that a sulfonic acid modified layer is incompatible with metal fluoride is overcome, and a proper combination of a sulfonating agent and metal fluoride is screened, so that the high-performance ion exchange membrane which can be used for a flow battery is successfully obtained.

The invention belongs to the technical field of battery electrolyte additives, and particularly discloses a sulfonamide / sulfonamide ester additive and application thereof in a sodium-ion battery electrolyte, the sulfonamide / sulfonamide ester additive is a compound with the structural formula shown in the formula (I): # imgabs0 #, the sulfonamide / sulfonamide ester additive provided by the invention can remove trace hydrofluoric acid and water existing in a battery by introducing amido; a group containing an F element is introduced, so that a compact passivation protection film can be formed on the surface of the electrode material, and further reaction of an electrolyte and the electrode material is isolated; a sulfonate group is introduced, the ionic conductivity of the electrolyte is improved, and a low-impedance electrode-electrolyte interface film can be formed, so that a sodium-ion battery electrolyte additive system with long service life and high safety is obtained; and the bottleneck problems of poor rate capability, short cycle life and the like of the sodium ion battery in the traditional carbonic ester and ether electrolyte are solved in a targeted manner.

The invention provides an amino acid frosted cleaning composition as well as a preparation method and application thereof. The amino acid frosted cleaning composition comprises a surfactant, an amino acid composition, a thickening agent, a humectant, an antioxidant, a pH regulator and water, the surfactant is a combination of cocoyl glycinate, cocamidopropyl hydroxy sulfobetaine, sodium cocoyl methyl taurine taurate, sulfonic acid hydroxypropyl ester lauryl glucoside cross-linked polymer sodium and glycolipid. According to the invention, a mild surfactant system with amino acid as a main component is adopted, so that the shampoo has rich and fine foam, quick foaming performance and easy washing performance, and the skin feeling is smooth and soft after washing. In addition, the system contains suspended crystal frosted particles formed by self-assembly of the amino acid composition, the appearance is novel, the better efficacy performance is achieved, and meanwhile the cleaning effect and the use comfort are improved.

The invention belongs to the field of cation exchange membranes, and discloses a monovalent selective cation exchange membrane with crown ether encapsulated in the membrane and a preparation method of the monovalent selective cation exchange membrane. Firstly, a sulfonated chloromethylated polymer is synthesized, a solvent is evaporated to form a membrane, and a chemical reaction of chloromethyl and amido contained in the membrane endows a growth site of a covalent organic framework. And then constructing a covalent organic framework in a membrane channel by an in-situ growth method, and packaging the crown ether nano material in the membrane. A regular porous channel of the covalent organic framework and a sulfonic acid group in the base membrane have a synergistic effect, so that good ion flux of monovalent ions is ensured. Meanwhile, the crown ether structure has a special recognition complexing effect on alkali metal ions and has different affinity to different metal ions, so that the monovalent cation selective separation is achieved, and the prepared monovalent selective cation exchange membrane is suitable for an electrodialysis process.

The invention provides composite anionic cellulose ether as well as a preparation method and application thereof. The composite anionic cellulose ether is prepared by etherifying alkalized cellulose through an etherifying agent A and an etherifying agent B in sequence, the etherifying agent A is selected from water-soluble halogenated alkyl sulfonic acid and / or water-soluble halogenated alkyl sulfonate; the etherifying agent B is selected from water-soluble halogenated alkyl carboxylic acid and / or water-soluble halogenated alkyl carboxylate. According to the composite anionic cellulose ether, a sulfonic acid group and a carboxylic acid group are sequentially introduced, so that the composite anionic cellulose ether has relatively high temperature resistance and salt and calcium resistance; the compound can be used as a filtrate reducer for the drilling fluid, can effectively control the filter loss of the drilling fluid, and can improve the salt pollution resistance of the drilling fluid, especially the calcium and magnesium ion pollution resistance.

The invention discloses zwitter-ion supramolecular hydrogel based on anion-pi as well as a preparation method and application of the zwitter-ion supramolecular hydrogel. The hydrogel is formed by self-assembly of a zwitterionic copolymer and a p-styrenesulfonic acid copolymer. According to the supramolecular hydrogel disclosed by the invention, the supramolecular hydrogel can be rapidly formed only by simply mechanically mixing the zwitterionic polymer copolymer and the p-styrene sulfonate copolymer solution, and the supramolecular hydrogel is endowed with excellent injectability and self-repairing performance due to the dynamic cross-linking characteristic. The hydrogel is composed of zwitterions with excellent immunocompatibility and poly (p-styrene sulfonate) with heparin-imitating performance, so that the hydrogel has excellent immunocompatibility, can play a role in various in-vivo application scenes, and in addition, the hydrogel can be used for preparing an anti-inflammatory drug. The dynamic cross-linked network based on anion-pi interaction and the heparin-like structure are very beneficial to protein preservation, and have wide application prospects in the fields of protein delivery and cell encapsulation.