1262 results about "Ionic polymerization" patented technology

The invention discloses an anti-scale cross-linked polymer fracturing fluid and a preparation method thereof, and relates to the technical field of petroleum fracturing fluids. When the anti-scale cross-linked polymer fracturing fluid is prepared, allylamine hydrochloride and epoxy chloropropane react to prepare a double-bond chlorinated intermediate; reacting the double-bond chlorinated intermediate with lauramidopropyl dimethylamine to prepare a cationic monomer; copolymerizing a cationic monomer and acrylamide to prepare a cationic polymer; the preparation method comprises the following steps: reacting L-lysine with formaldehyde and phosphorous acid to prepare phosphoric acid modified lysine; reacting the phosphoric acid modified lysine with allyl glycidyl ether to prepare a phosphoric acid modified monomer; acrylamide and an anionic monomer are copolymerized to prepare an anionic polymer; the anionic polymer and the cationic polymer are dissolved in water to prepare the anti-scale cross-linked polymer fracturing fluid. The anti-scale cross-linked polymer fracturing fluid prepared by the invention has the advantages of scale prevention, good temperature resistance, good shear resistance and self-crosslinking.

The invention discloses a high-stability endotoxin-free PHA nano-emulsion and a preparation method thereof, and belongs to the technical field of biodegradable high polymer material compositions and processing thereof. The nano-emulsion is characterized in that the endotoxin content is not higher than 0.10 EU / g, the median particle size d50 is 100-200 nm, and the PDI is not higher than 0.15, and the nano-emulsion is stable in long-term storage. The preparation method is a continuous solvent-free process and comprises the steps of melt extrusion, high-pressure thermal emulsification and deep endotoxin removal. By adopting the specific pH-insensitive cationic polymer emulsifier and the crystallization inhibitor, the chemical contradiction that an efficient alkaline purification process is incompatible with a nano-emulsion stable system is solved, physical aging is inhibited, and an unexpected technical effect is obtained. The invention also discloses an O / W type cream containing the nano emulsion.

The invention provides a diaphragm and a preparation method thereof and a lithium ion battery, the diaphragm comprises a base membrane layer and a composite functional layer, the composite functional layer comprises hydrophobic SiO2 aerogel modified by a hydrophobic agent, a conductive ion polymer and a solid electrolyte, and the composite functional layer respectively accounts for 3-12wt%, 0.5-1.0 wt% and 0.5-1.5 wt% of the total mass of the diaphragm; the hydrophobic agent comprises trimethylchlorosilane, hexamethyldisilazane, perfluorooctyltriethoxysilane, polyvinylidene fluoride, polydimethylsiloxane and the like, the conductive ionic polymer comprises polyvinylpyrrolidone, lithium polymethacrylate, lithium polystyrene sulfonate, polyacrylamide and the like, and the solid electrolyte comprises lithium lanthanum titanium oxide, lithium lanthanum zirconium oxide, lithium lanthanum zirconium tantalum oxide and the like. The wettability is improved by the high porosity of the hydrophobic SiO2 aerogel, the stability and strong conductivity of a physical conductive network of the solid electrolyte and the ion affinity and amphoteric binding capacity of the conductive ion polymer are optimized, the electrochemical performance and thermal stability of the interface are optimized, and comprehensive optimization of the thermal-electric-interface performance of the diaphragm is realized through combination.

A new polyelectrolyte multilayer coated proton-exchange membrane for electrolysis and fuel cell applications has been developed for electrolysis and fuel cell applications. The polyelectrolyte multilayer coated proton-exchange membrane comprises: a cation exchange membrane, and a polyelectrolyte multilayer coating on one or both surfaces of the cation exchange membrane. The polyelectrolyte multilayer coating comprises alternating layers of a polycation polymer and a polyanion polymer. The polycation polymer layer is deposited on and is in contact with the cation exchange membrane. The top layer of the polyelectrolyte multilayer coating can be either a polycation polymer layer or a polyanion polymer layer.

The invention relates to the technical field of pharmaceutical preparations, and provides double-shell JAK inhibitor nanoparticles, a preparation method thereof and targeted delivery eye drops. The double-shell JAK inhibitor nanoparticle provided by the invention comprises a core, an inner shell and an outer shell, wherein the core comprises a nanostructure lipid carrier and a JAK inhibitor; the inner shell layer is a cationic polymer, and the outer shell layer is hyaluronic acid. Through the design of the positive charge inner shell layer and the negative charge outer shell layer, the dual functions of mucosa adhesion and active targeting are achieved, the surface of the nanoparticle is electronegative finally, cytotoxicity possibly caused by direct exposure of a cationic polymer is reduced, non-specific aggregation of the cationic polymer and electronegative protein in tears is avoided, and the stability of tears is improved. And the stability of the preparation is improved. The eye drops provided by the invention can obviously prolong the residence time of the JAK inhibitor on the ocular surface, enhance the cornea permeability, can actively target to ocular inflammatory cells, and have a wide application prospect.

The invention relates to the technical field of daily chemical industry, and discloses a moisturizing and soothing composition and application thereof.The moisturizing and soothing composition comprises, by weight, 20-25% of C14-16 sodium olefin sulfonate, 20-25% of C14-16 sodium alkyl sulfonate, 20-25% of C14-16 sodium alkyl sulfonate, 10-20% of C14-16 0.3%-0.7% of a cationic polymer; a litchi pericarp extract; an aloe extract; and a rosemary extract; wherein the total weight percentage of the litchi peel extract, the aloe extract and the rosemary extract is 1.9%-3.3%. The components are compounded, the cationic polymer and the anionic surfactant are utilized to construct a deposition system, and the three plant extracts with specific total content are cooperated, so that the retention rate of active ingredients in scalp is effectively increased, and the problem that moisturizing and soothing ingredients are easy to wash away is solved. The invention also provides a preparation method combining hot preparation and cold preparation, and the stability of the system and the activity of the extract are ensured by homogenizing the phase A at high temperature and adding the phase E at low temperature. The composition can be used for preparing shampoo products for moisturizing or relieving scalp.

The invention relates to a cyclopeptide inhibitor aiming at human STING (stimulating interferon gene) and application of the cyclopeptide inhibitor. The cyclic peptide can specifically bind to and inhibit activation of human STING. The invention also provides a nanoparticle delivery system for loading the cyclopeptide on a cationic polymer PBAE and an amphiphilic polymer pDMA-pEPEMA, and a preparation method of the nanoparticle delivery system. The cyclic peptide and the nanoparticles thereof can be used for preparing medicines for treating autoimmune diseases (such as systemic lupus erythematosus and the like) caused by excessive activation of the cGAS-STING signal pathway. Compared with the existing small molecule STING inhibitor, the cyclopeptide inhibitor provided by the invention has higher specificity, stability and inhibition effect.

The invention relates to a method for preparing polyamide 6 fine denier fibers through anionic polymerization. Caprolactam and a catalyst are added into a drying device A to remove system moisture and then placed in a storage tank A. Caprolactam is added into a drying device B to remove moisture and then placed in a storage tank B together with an initiator and a cyclic oligomer inhibitor. Caprolactam liquid in the storage tank A and the storage tank B is continuously injected into a screw extruder for anionic ring-opening polymerization reaction to prepare a polyamide 6 basic melt, the basic melt is further conveyed to a tandem devolatilization reaction system to remove monomers and part of cyclic oligomers to obtain a polyamide 6 final polymer, and finally, the polyamide 6 final polymer can be directly spun. The polyamide 6 fine denier fiber is obtained.

The invention relates to a method for preparing a solid polymer electrolyte by UV photo-initiated tandem cationic polymerization. The method comprises the following steps: mixing a free radical polymerization monomer, a cationic polymerization monomer, an initiator and a lithium salt, carrying out light free radical polymerization under ultraviolet irradiation to obtain a free radical polymerization prepolymer, carrying out extrusion primary shaping on the free radical polymerization prepolymer, and carrying out series cationic polymerization to prepare the solid electrolyte. The solid electrolyte has the characteristics of environment friendliness, good stability, safety in use and difficulty in liquid leakage, does not use redundant monomers and solvents, and can realize rapid and batch production of the solid electrolyte.

Proton exchange membranes are described. The proton exchange membrane includes: a reinforcing membrane; a continuous non-porous hydrogen recombination catalyst coating, the continuous non-porous hydrogen recombination catalyst coating comprising a mixture of a hydrogen recombination catalyst and a proton conducting ionomer; and a continuous non-porous cross-linked polyelectrolyte multilayer coating, the continuous non-porous cross-linked polyelectrolyte multilayer coating comprising alternating layers of a polycationic polymer and a polyanionic polymer. Catalyst coated membranes incorporating proton exchange membranes and methods of making proton exchange membranes are also described.

The invention relates to the field of printing inks and discloses a wear-resistant and scratch-resistant printing ink, a preparation method thereof, and an application thereof. The printing ink comprises: a modified aqueous polyurethane emulsion, a modified mica sheet, a pigment, an additive, and deionized water; the modified aqueous polyurethane emulsion is prepared by introducing a double-terminal hydroxyl chain extender into a polymer; the double-terminal hydroxyl chain extender is reacted with a Schiff base intermediate obtained by reacting salicylaldehyde and p-aminobenzyl alcohol and isocyanoethyl methacrylate, and the obtained double-bonded Schiff base intermediate is reacted with 1,1,3,3-tetramethyldisiloxane to prepare the ink; the modified mica sheet is reacted with triethylenetetramine, formaldehyde, and acetone, and then formaldehyde is added under alkaline conditions for polycondensation, the obtained cationic polymer and glutaraldehyde are prepared into the cationic mica sheet, and finally polyaniline is grown on the surface of the mica sheet through interfacial polymerization. The ink prepared by the invention has good adhesion, high hardness, and excellent water resistance, wear resistance, heat resistance, antistatic properties, and antibacterial properties.

The invention discloses a cationic polymer acid-resistant thickening agent as well as a preparation method and application thereof, and belongs to the technical field of oil-gas field development. The polymer thickening agent is prepared from the following components in percentage by mass: 65 to 85 weight percent of acrylamide, 15 to 35 weight percent of methacryloyloxyethyl trimethyl ammonium chloride, 0.01 to 0.05 weight percent of dicationic functional monomer and 1 to 8 weight percent of cosolvent, the acid liquor system comprises the following components in percentage by mass: 5wt%-30wt% of solid acid, 0.01 wt%-0.6 wt% of a cationic polymer acid-resistant thickener, 0.5 wt%-5.0 wt% of a corrosion inhibitor, 0.3 wt%-1.0 wt% of an iron ion stabilizer and the balance of water; wherein the solid acid consists of 5wt%-15wt% of a solid metal catalyst and 85wt%-95wt% of solid particle acid; the acid liquid system has excellent slow release performance, is simple in formula, convenient to transport, low in cost and suitable for site construction, and has wide market prospects.

The invention discloses a microcapsule material, a microcapsule using the microcapsule material and a preparation method of the microcapsule, and relates to the technical field of daily chemical products. The microcapsule material comprises an addition polymer formed by a ring-opening reaction of epoxy resin and bio-based polyamine, poly (beta-amino ester) formed by a Michael addition reaction of acrylate and phenyl polyamine, and at least one cationic polymer containing quaternary ammonium groups. The microcapsule material shows certain biodegradability, the biodegradation rate of the microcapsule material exceeds 20% within 28 days, and the applied microcapsule can effectively meet the friction fragrance release performance requirement required by essence wrapping, so that after the obtained essence-encapsulated microcapsule is stored in a lotion at 45 DEG C for 28 days, the fragrance release performance of the microcapsule material is not influenced by the friction fragrance release performance, and the fragrance release performance of the microcapsule material is not influenced by the friction fragrance release performance. The excellent friction aroma releasing capability and the adhesion capability on the fabric can still be maintained, and the excellent thermal stability is shown.

The invention discloses a cationic polymer scale inhibitor as well as a preparation method and application thereof, and relates to the field of scale inhibitors in geothermal pipelines, the scale inhibitor limits easy-to-scale metal from adhering and scaling on a coating through cationic groups on polymer molecule side chains, meanwhile, the surface contact angle of the coating is increased through functional components with low surface energy, and the scale inhibitor can be used for inhibiting scale formation of the coating. The cationic polymer-based scale inhibitor has the advantages that the cationic polymer-based scale inhibitor is added into the geothermal fluid, so that some granular solid components of the geothermal fluid are difficult to accumulate on the coating to form a crystallized nucleation center, the problems of scaling and accumulation are fundamentally solved, in addition, the cationic polymer-based scale inhibitor has excellent adhesive force with the geothermal pipeline, and guarantee is provided for the corrosion resistance and the long-term effect of the coating.

The invention provides an enzyme protective agent for a continuous glucose sensor and the continuous glucose sensor, the enzyme protective agent comprises the following components: poloxamer and a zwitterionic polymer, and the mass percent concentration of the poloxamer is 0.1%-2%, and the mass percent concentration of the zwitterionic polymer is 0.5%-5%. By adopting the technical scheme provided by the invention, the poloxamer and the zwitterionic polymer are introduced, so that an enzyme layer coating process can be optimized, a coffee ring effect can be inhibited, and the consistency and monitoring accuracy of the sensor can be improved; and on the premise of keeping the signal transmission performance of the sensor unchanged, the activity and long-term stability of the biological enzyme preparation in the production, storage, transportation and use processes are remarkably improved.

Disclosed are cationic polymers comprising monomers such as those described in Formula (I),Such polymers can be useful for the preparation of therapeutic compositions (e.g., compositions comprising nucleic acids such as mRNA). Additionally, therapeutic compositions comprising these cationic, biodegradable polymers can have improved properties and reduced toxicity.

The gadolinium-based cationic polymer contrast agent is synthesized by chelating a cationic polymer and gadolinium ions, has high biological safety and can be used for cartilage imaging. The prepared contrast agent adopts an articular cavity direct injection method, so that the imaging effect is improved, and the contrast dosage is reduced. When the cartilage activity is normal, the content of glycosaminoglycan in the matrix is rich, and when the cartilage is inactivated or the activity is reduced, the content of glycosaminoglycan in the matrix is obviously reduced. The gadolinium-based cationic polymer contrast agent is combined with negatively charged glycosaminoglycan in a cartilage matrix through the charge effect. The gadolinium-based cationic polymer contrast agent can be used for noninvasive and quantitative evaluation of cartilage activity in nuclear magnetic resonance imaging, especially cartilage activity and stability in transplantation.

The invention relates to a preparation method of a water electrolysis hydrogen production composite electrode based on a zwitterionic polymer binder. According to the method, a traditional ionic binder Nafion is replaced with a zwitterionic polymer polysulfobetaine methacrylate, an electrode-electrolyte interface is optimized through a unique electrically neutral hydration layer structure, the rapid desorption behavior of bubbles is enhanced, and efficient transmission of reaction ions is also promoted; and regulating and controlling the mass ratio of the PSBMA binder to the catalyst by using a spraying process. The invention aims to overcome the defects of high cost, insufficient mass transfer and poor interface stability of the existing Nafion binder, and provides the composite electrode taking PSBMA as the binder and the preparation method of the composite electrode, and the provided composite electrode is simple in preparation process and controllable in cost, and has good popularization and application prospects.

The present invention provides a method for preparing a semi-solid-state battery and its application. The preparation method comprises the following steps: (1) injecting a polymerizing agent into an assembled battery, aging the battery, and then injecting an electrolyte to obtain a battery that has been injected; (2) allowing the battery that has been injected in step (1) to stand for a gelation reaction, and after the gelation reaction is completed, sequentially performing formation, aging, and volume separation on the battery to obtain the semi-solid-state battery; wherein the polymerizing agent in step (1) includes a solvent with a cationic polymerization function and / or a gelling factor with a cationic polymerization function. The present invention uses an in-situ polymerization method to prepare a semi-solid-state battery. After mixing the polymerizing agent and the liquid electrolyte, the polymerizing agent contains a solvent with a cationic polymerization function and / or a gelling factor with a cationic polymerization function, and a gelation polymerization reaction is initiated in the liquid electrolyte, thereby obtaining a semi-solid-state battery with low impedance, high energy density, and high safety performance.

The invention relates to the technical field of biological medicine, in particular to anti-acne hydrogel and a preparation method thereof. The anti-acne hydrogel is prepared from metal-polyphenol network nanoparticles and a hydrogel base material, the metal-polyphenol network nanoparticles comprise a first polyphenol compound, a second polyphenol compound and metal ions, the first polyphenol compound is a tannic acid compound, and the second polyphenol compound is a flavonoid compound; the hydrogel base material comprises a hydrophilic high-molecular polymer and a cationic polymer. The metal-polyphenol network nano-particles are creatively utilized, the anti-inflammatory and anti-oxidation activity of flavonoid compounds, the convergence and protein binding characteristic of tannin and the antibacterial activity of metal ions are integrated at the same time, and the vicious circle of acne can be intervened at the same time from multiple links of antibacterial, anti-inflammatory, anti-oxidation and keratinization adjustment; and the defect of single action target spot of the existing medicine is overcome.

The invention relates to a side chain type polyaryl anion-exchange membrane, a preparation method and application thereof and an anion-exchange membrane electrolytic bath, and belongs to the technical field of hydrogen energy. The preparation method of the side chain type polyaryl anion exchange membrane comprises the following steps: reacting a side chain type polyaryl skeleton polymer with a quaternization reagent to obtain a side chain type polyaryl anion polymer; the side-chain type polyaryl anion polymer is subjected to membrane forming, and the side-chain type polyaryl anion exchange membrane is obtained. According to the invention, a heteroatom-free polyaryl structure is selected as a main chain, and a super-acid-catalyzed Friedel-Crafts reaction is adopted for polymerization, so that the high-molecular polymer is obtained; the cationic functional group is a piperidine cationic functional group with excellent alkali stability; the piperidine cation functional group is connected with the polyaryl main chain through a long alkyl chain. According to the invention, a long alkyl chain is adopted to combine a polyaryl skeleton with a piperidine cation functional group, and a hydrophilic / hydrophobic microphase separation structure is constructed in the membrane, so that the conductivity of hydroxyl ions is remarkably improved while the alkali stability and the size stability are improved.

The present invention relates to a composition for transfecting a nucleic acid molecule into a cell and its use. The present invention relates to a composition suitable for transfecting a nucleic acid molecule into a cell, preferably a eukaryotic cell, comprising (i) at least one compound of general formula (I), preferably general formula (III), or a tautomer, mesomers, racemates, enantiomers, diastereomers, or mixtures thereof, or an acceptable salt thereof, and (ii) an acceptable excipient, buffer, cell culture medium, or transfection medium, wherein Y 1 , Y 2 , Y 3 , Z 1 , Z 2 , Z 3 , X1, X2, R3, P + , R and V are as defined herein. The present invention also relates to uses of said compositions and to methods for the in vitro or ex vivo transfection of living cells.

The invention relates to the technical field of cement admixtures, in particular to a preparation process of an environment-friendly cement raw material grinding-aid grinding agent. According to the process, electrolytic manganese residues and industrial waste alkali liquor are used as raw materials, and the core is that multi-step synergistic chemical modification is performed: firstly, the electrolytic manganese residues are subjected to low-temperature plasma activation pretreatment to increase surface active sites; secondly, carrying out graft copolymerization on lignin in the industrial waste alkali liquor by utilizing an RAFT (Reversible Addition-Fragmentation Chain Transfer) polymerization technology, and introducing carboxyl and amide groups to synthesize a zwitterionic polymer; then, mixing the modified electrolytic manganese residues with modified alkali liquor, and inducing to generate a nano precursor with a core-shell structure through a supramolecular self-assembly and bionic silicification principle; and finally, carrying out spray drying to obtain a final product. According to the mineralizer disclosed by the invention, the grindability and the burnability of cement raw materials can be remarkably improved, the clinker burning coal consumption can be reduced, more importantly, marine cement can be endowed with excellent chloride ion penetration resistance, and meanwhile, high-added-value resource utilization of solid wastes is realized.

The invention relates to the field of separation and purification, in particular to an anti-pollution nanofiltration membrane for magnesium-lithium separation, the anti-pollution nanofiltration membrane comprises a base membrane and a functional layer, and the functional layer is prepared from the following raw materials in parts by weight: a water phase: 1.5-2.5 parts of piperazine, 0.1-1 part of lauryl sodium sulfate, 0.5-2 parts of glycerol, 1-2 parts of triethylamine, 0.6-2 parts of ionic polymer, and the balance of water for supplementing the total amount of the water phase to 100 parts; the ionic polymer comprises at least one of sulfobetaine metacrylic acid ester, sulfobetaine and carboxyl betaine metacrylic acid ester; and an oil phase: 0.1-1 part of trimesoyl chloride, and the total amount of the oil phase is supplemented to 100 parts by normal hexane or isoparaffin. The ionic polymer is added, and a compact hydration layer is formed on the surface of the membrane by using a betaine group of the ionic polymer, so that the membrane pollution probability is reduced, and common inorganic scaling and organic pollution in the high-salt brine are remarkably inhibited; in addition, the ionic polymer enables the membrane surface to have strong negative electricity, and the magnesium ion rejection rate is improved; and the ionic polymer can also reduce the lithium ion transmission energy barrier and reduce the rejection rate.

A bio-electrode composition contains (A) an ionic polymer material, (B) an addition reaction-curable silicone having at least a hydrosilyl group, (C) a platinum-group catalyst, and a solvent. The bio-electrode composition has a water content of 0.2 mass % or less. The solvent includes one or more of an ether solvent, an ester solvent, and a ketone solvent each of which does not contain a hydroxy group, a carboxyl group, a nitrogen atom, or a thiol group. Thus, present invention provides: a bio-electrode composition capable of forming a living body contact layer for a bio-electrode which is excellent in electric conductivity and biocompatibility, light-weight, and manufacturable at low cost, and which does not leave residue on skin after attachment to and peeling from the skin; a bio-electrode including a living body contact layer formed of the bio-electrode composition; and a method for manufacturing the bio-electrode.

A resin composition that contains: (A) a bio-polyethylene resin; (B) an ethylene-vinyl alcohol copolymer having an ethylene content of 20 to 60 mol %; and (C) at least one component selected from the group consisting of an ethylene-vinyl acetate copolymer, an acid-modified ethylene-α-olefin copolymer, an ethylene-unsaturated monocarboxylic acid copolymer, an ionomer of the ethylene-unsaturated monocarboxylic acid copolymer, an ethylene-vinyl alcohol copolymer having an ethylene content of 70 to 90 mol %, and a hydrotalcite compound. The resin composition employs a bio-polyethylene resin and yet can suppress gumming and provide a formed product having an excellent appearance.

The invention provides a method for preparing a polyamide 6 material by anionic polymerization, which comprises the following steps: adding caprolactam and a catalyst into a drying device A to remove system moisture, putting into a storage tank A, adding caprolactam into a drying device B to remove moisture, putting into a storage tank B together with an initiator and a cyclic oligomer inhibitor, and carrying out anionic polymerization to obtain the polyamide 6 material. Then continuously injecting the caprolactam liquid in the storage tank A and the storage tank B into a screw extruder through a conveying device, carrying out anionic ring-opening polymerization reaction to prepare a polyamide 6 basic melt, further conveying the basic melt into a devolatilization reactor, and efficiently removing monomers and oligomers to obtain a polyamide 6 final polymer; the final polymer can be directly subjected to melt direct spinning, injection molding or film blowing to obtain high-quality polyamide 6 fibers, engineering plastics or films.

The invention belongs to the field of heavy metal adsorption separation and solid adsorbents, and provides a dendritic polyethyleneimine surface modified GO / MXene nano adsorbent as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing a graphene oxide dispersion liquid with a Ti3C2Tx colloidal solution, and carrying out dispersion treatment to obtain a GO-Ti3C2Tx mixed solution with a certain concentration; adding dendritic polyethyleneimine, and carrying out covalent modification and electrostatic assembly strategy reaction to obtain a dendritic polyethyleneimine modified GO / MXene reaction solution; and centrifuging, washing and drying to obtain the dendritic polyethyleneimine surface modified GO / MXene adsorbent. According to the invention, the nitrogen-rich cationic polymer is introduced, so that the adsorption capacity of graphene oxide to Cr (VI) is improved; the preparation process is simple, green and environment-friendly; the obtained adsorbent can efficiently remove Cr (VI) in a water body, and has a good adsorption effect on Cr (VI).

The invention relates to the technical field of drilling fluid treating agents, in particular to a high-temperature-resistant zwitterionic polymer viscosity reducer as well as a preparation method and application thereof. The high-temperature-resistant zwitterionic polymer viscosity reducer comprises a polymerization product of a vinyl-containing monomer A, a vinyl-containing monomer B and a cationic monomer, the vinyl-containing monomer A contains a structural unit as shown in a formula I, and the vinyl-containing monomer B contains a structural unit as shown in a formula II; the high-temperature-resistant zwitterionic polymer viscosity reducer has the advantages of wide adaptability, good stability, remarkable viscosity reduction effect, temperature resistance and viscosity reduction capability; the viscosity reducer has excellent viscosity reduction performance at high temperature, can resist the temperature of 180 DEG C, has the viscosity reduction rate of 95%, and has the capability of inhibiting hydration expansion of shale.

The invention relates to the technical field of hydrogel, in particular to photocuring 3D printing ink and a preparation method thereof, synchronous curing bi-crosslinking hydrogel and application thereof. According to the invention, based on the characteristic that an initiator (persulfate) commonly used in a hydrogel preparation process has strong oxidizing property and can react with reducing metal ions to generate free radicals, Fe < 2 + > released by a cationic photoinitiator containing Fe < 2 + > in ultraviolet light reacts with persulfate to generate Fe < 3 + > and free radicals; the preparation of the water-soluble anionic polymer and water-soluble vinyl monomer double-network cross-linked hydrogel is synchronously realized. According to the invention, the problems of insufficient conductivity, stretchability and flexibility of hydrogel prepared by utilizing photocuring 3D printing are solved.