63 results about "Co2 responsive" patented technology

The invention relates to a preparation method of a temperature and CO2 double-responsive block copolymer nano micelle. The preparation method disclosed by the invention comprises the following steps of initiating caprolactone ring-opening polymerization by utilizing pyrene methanol under the protection of inert gas, then, carrying out esterification reaction by utilizing terminal hydroxyl of polycaprolactone and terminal carboxyl of a reversible addition-fragmentation chain transfer polymeric chain transfer agent, thereby obtaining a reversible addition-fragmentation chain transfer polymerized macromolecular chain transfer agent; and carrying out reversible addition-fragmentation chain transfer polymerization of N-isopropylacrylamide and an N,N-dimethylacrylic acid dimethylamino ethyl ester monomer by taking azodiisobutyronitrile as the initiator under the protection of inert gas so as to obtain Py-PCL-b-(NIPAM-coDMAEMA) block copolymer, dissolving the Py-PCL-b-(NIPAM-coDMAEMA) block copolymer in water, thereby obtaining a steady temperature and CO2 responsive nano-micelle. The temperature and CO2 double-responsive block copolymer nano-micelle disclosed by the invention has biodegradability, biocompatibility and bioactivity simultaneously; the steady nano micelle self-assembled in water has temperature and CO2 double-responsive characteristic; the preparation method disclosed by the invention has wide application prospect in the fields, such as drug-controlled release carriers, biological intelligent switches, soft tissue engineering bracket materials and biological sensors; the preparation method disclosed by the invention is simple and practicable and has good popularization and application values; all the raw materials can be industrially produced.

The invention provides a preparation method of long-chain alkyl amidopropyl dimethylamine with CO2 responsiveness, and relates to the preparation, purification and structure of several long-chain alkyl amidopropyl dimethylamine compounds with CO2 responsiveness as well as CO2 responsiveness characterization. The long-chain alkyl amidopropyl dimethylamine with CO2 responsiveness comprises palmitylamidopropyl dimethylamine, stearamidopropyl dimethylamine, oleamidopropyl dimethylamine and behenamidopropyl dimethylamine, and is low in preparation temperature, simple in the preparation method and high in the yield; and the aqueous solution of the long-chain alkyl amidopropyl dimethylamine has CO2 responsiveness, and phase transition can happen when CO2 is led in, so that the long-chain alkyl amidopropyl dimethylamine can be applied to reaction and separation with different polarity requirements, and the aqueous solution of the long-chain alkyl amidopropyl dimethylamine can be used as CO2-responsive gel. A compound prepared by the preparation method disclosed by the invention can also be used for increasing the recovery ratio of oil and gas fields.

The invention provides a CO2 responsive hyperbranched polymer. The polymer is prepared through one of the following methods. According to the first method, CO2 responsive monomers, a catalyst, ligand, initiator monomers and solvent serve as raw materials, and the target product is prepared through the ATRP method. According to the second method, CO2 responsive monomers, chain transfer agent monomers, initiator and solvent serve as the raw materials, and the target product is prepared through the RAFT. The CO2 responsive hyperbranched polymer can serve as forward osmosis extract solute, and is specifically applied to the forward osmosis seawater desalination process; CO2 is introduced into an extraction solution, the polymer is dissolved in water to form a high-osmotic-pressure extraction solution, water flux is large, counter diffusion is small, N2 is introduced into the extraction solution, polymer will precipitate and be separated out, the polymer is filtered and recycled to be used for forward osmosis next time, the extraction solute is easy to recycle, energy consumption is low, and the extraction solute can be repeatedly used.

The present invention relates to the fracturing field, and discloses a water solution, a clean fracturing fluid, and a method for fracturing reservoir. The water solution contains organic acid amidopropyl dimethylamine, an additive, and water, wherein, the additive is at least one of salicylate, cis-butenedioic acid, o-phthalic acid, dodecyl sulfonate, p-toluene sulfonate, and benzoate. The water solution has high carbon dioxide response performance, a clean fracturing fluid that contains the water solution has superior cyclic utilization performance, and the fracturing fluid can solve the problems of conventional fracturing fluids used in fracturing stimulation of oil and gas reservoirs, including incomplete gel breaking, severe damages to the reservoir, and severe contamination of flow-back fluid, etc.

The invention discloses a chemical intervention in-situ emulsification system, which comprises the following raw materials by weight: 0.1-0.3% of a CO2 responsive monomer, 0.1-0.3% of a surfactant, 0.01-0.1% of a hydrophilic nano-material, and the balance of water, the surfactant is an anionic surfactant or an anionic-nonionic surfactant, The nano material is one or a mixture of more of crystalline flake graphite powder, graphene oxide, hydrophilic silicon dioxide and hydrophilic carbon nanotubes. The chemical intervention emulsification system can be suitable for heavy oil reservoirs and thin oil reservoirs, meanwhile, the viscosity of the chemical intervention emulsification system is adjusted to a moderate degree, the viscosity of the chemical intervention emulsification system is not too small or too large, and the chemical intervention emulsification system can be used for heterogeneous reservoirs. Meanwhile, after the crude oil forms the emulsion, other demulsifiers do not need to be added, and rapid demulsification and dehydration can be realized only by introducing N2 gas.

The invention provides a preparation method of a carbon dioxide-responsive membrane. The preparation method includes: mixing a carbon dioxide-responsive monomer, a cross-linking agent, an initiating agent and water uniformly, heating to 40-90 DEG C after deoxygenizing in nitrogen, and subjecting to reaction for 1-24 hours to obtain carbon dioxide-responsive microgel latex; diluting the carbon dioxide-responsive microgel latex through deionized water to obtain carbon dioxide-responsive microgel dispersion liquid, placing a basement membrane in a filtering device, and filtering the basement membrane through the carbon dioxide-responsive microgel dispersion liquid in the condition of positive pressure or negative pressure to obtain the carbon dioxide-responsive membrane. The preparation method has the advantages that carbon dioxide-responsive microgel is placed into the basement membrane by a simple direct filtering method, responsiveness of the carbon dioxide-responsive membrane to CO2 (carbon dioxide) is achieved since size of an effective membrane hole is changed due to the fact that size of the microgel in the basement membrane is responsive to CO2, and the carbon dioxide-responsive membrane prepared by the preparation method has the advantages of mutational front-back water flow quantity, mutational filter fineness and excellent circularity.

The invention discloses a method for screening a plant variety with a leaf strengthening function. The invention belongs to the fields of breeding of crop high-lighting-effect and high-temperature-resistant variety, and relates to a method for screening a high-light-effect corn variety by a technological system, wherein the technological system is to screen a large amount of corn combination by applying leaf temperature, difference between leaf temperature and air temperature, leaf chlorophyll content, leaf nitrogen content and a fluorescence parameter PI (abs), select about 8 parts of materials, measure the photosynthetic rate by an LI-6400 photosynthesis system at the daily maximum temperature being 35 DEG C or above and select 3 to 4 parts of materials again to measure parameters such as photoresponse and carbon dioxide response. Compared with other breeding methods, the technology has the characteristic of screening a large amount of corn varieties, is suitable for selecting and breeding a high-quality corn variety from a large amount of varieties and has a good application prospect.

The invention belongs to the technical field of medical materials, and discloses a modified dendritic PAMAM polymer as well as a preparation method and application thereof. The structure formula of the modified dendritic PAMAM polymer is PAMAM-(NH-C(O)-O-R)n, wherein R is tertiary amine group substituted alkyl; -NH- in the structure is amido-NH2 at the terminal of the PAMAM polymer; n is an integer greater than 0; the PAMAM polymer is preferably the fourth generation or the fifth generation PAMAM polymer. The modified dendritic PAMAM polymer has the temperature response, pH response and carbondioxide response performances; compared with a non-modified PAMAM, the modified dendritic PAMAM polymer has the advantage that the toxicity is obviously reduced. The invention further discloses application of the modified dendritic PAMAM polymer in a medicine carrier.

The invention discloses a preparation method of a double-stimulation expanding gel particle for preventing gas channeling in the process of carbon dioxide oil displacement. The method includes: 1), dissolving an acrylamide monomer into water to form a solution, adding a crosslinking agent, a temperature response monomer methacrylic acid N, an N-dimethylaminoethyl ester monomer and carbon dioxide response monomer (2-(methacrylenyl oxide) ethyl) dimethyl-(3-sulfonic acid propyl) ammonium hydroxide to the solution with even stirring to form a mixed monomer solution polymerization system, and feeding nitrogen to the polymerization system to remove dissolved oxygen in the system; 2), mixing the mixed monomer with an initiator solution for polymerization reaction. The gel particle continuous expands under CO2 and thermal stimulation, secondary expansion of the gel particle under the acidic environment is achieved, and long-time blocking function can be played.

The invention discloses a shape memory anti-tear hydrogel with carbon dioxide responsibility and a preparation method. The preparation method comprises the following steps: taking 2-vinyl-4,6-diamino-1,3,5-triazine and N,N-dimethyl acrylamide as monomers, taking polyethylene glycol acrylate as a cross-linking agent, and preparing the shape memory anti-tear hydrogel through copolymerization under an initiator, wherein the mass ratio of 2-vinyl-4,6-diamino-1,3,5-triazine to N,N-dimethyl acrylamide is (3:2)to(3:1). The hydrogel has strong stretch resistance, compression resistance, tearing resistance and notching resistance, meanwhile, the hydrogel has stimulative-responsibility on CO2, and has a shape memory function under the stimulation of CO2. The preparation method is simple, and the shape memory anti-tear hydrogel is easy to store for a long time and transport for a long distance.

The invention discloses a responsive interpenetrating network gel particle for preventing CO2 gas channeling of compact oil reservoirs and preparation method thereof. The gel particle is prepared from, in percentage by mass, 15 to 25 percent of acrylamide monomer, 0 to 5 percent of temperature-resistant and salt-resistant monomer, 3 to 6 percent of a CO2 responsive monomer; and a cross-linking agent, an initiator I, an initiator II and water. Gel particles are prepared from acrylamide and a temperature-resistant and salt-resistant monomer, and the prepared gel particles, a CO2 response monomerand the gel particles are dissolved in water and react for a period of time to obtain the temperature-resistant and salt-resistant hydrogel. According to the invention, the cross-linking density of the particles in unit volume is increased by the interpenetrating network structure, so that the strength of the particles is increased; after the CO2 responsive interpenetrating polymer network gel particle is in contact with CO2, the particle size is increased, and CO2 responsiveness is shown, so that the regulation and control strength in the CO2 displacement process is improved; meanwhile, whenthe CO2 responsive interpenetrating polymer network gel particle is not in contact with CO2, the particle size is reduced, and good reversibility is shown.

The invention belongs to the field of intelligent polymer materials and relates to a chiral CO2 responsive vinyl amino acid polymer and a preparation method thereof. The polymer e is obtained by reacting a compound a with a compound b under the action of a catalyst to obtain a chiral monomer c, and polymerizing the monomer c in a solvent III, wherein the compound a is vinyl amino acid benzyl ester, and the compound b is an alpha-primary amine-omega-tertiary amine small molecule. The preparation method provided by the invention does not need a sodium azide reaction and a click reaction and is mild in reaction conditions; the polymer obtained by the preparation method disclosed by the invention has chirality; in addition, along with alternative introduction of CO2 and N2, the polymer has hydrophilic and hydrophobic transformation, which shows that the polymer has obvious CO2 response performance; besides, amino contained in the terminal of the polymer has remarkable advantages in DNA (Deoxyribonucleic Acid) compression and gene transfer; the chiral CO2 responsive vinyl amino acid polymer has a wider application prospect in the fields of drug controlled release, genetic engineering, chiral separation and catalysis.

This invention relates to a switchable adsorption and desorption process triggered by carbon dioxide (CO2) to remove contaminants such as heavy metal ions using CO2-responsive adsorbent materials forwater purification. The method comprising the steps of: (a) contacting a wastewater that comprises at least one contaminant with a polymeric adsorbent material, which comprises CO2-responsive functional groups that are in a form capable of complexing the at least one contaminant; (b) separating the adsorbent-contaminant complexes from the wastewater; (c) bubbling CO2 into the concentrated aqueoussolutions of such complexes to regenerate the polymeric adsorbent material by releasing the contaminant from the polymeric adsorbent material, wherein the CO2-responsive functional groups are in a CO2-replete form; (d) separating the released contaminants from the polymeric adsorbent material. The pKb of the polymeric adsorbent material is from 7.5 to 9.0. The CO2-responsive polymeric adsorbent materials disclosed herein can be complex, released and be regenerated without the need for heat or acid to be introduced into the decomplexation or regeneration steps.

The invention relates to a preparation method of a CO2 responsive intelligent hydrophilic and hydrophobic switching copper net, which relates to a preparation method of a hydrophilic and hydrophobic switching material, and solves the technical problems that the existing CO2 responsive hydrophilic and hydrophobic material cannot improve the existing hydrophobic performance to the super-hydrophobicperformance. The preparation method comprises the following steps: I, preparing a copper net with a needle-shaped coarse structure; II, assembling Ag nano particles onto the surface of the copper net;III, preparing a CO2 responsive polymer; and IV, preparing the CO2 responsive super-hydrophobic copper net. According to the preparation method, by etching the surface of the copper net and assembling the Ag nano particles onto the surface of the copper net, the surface coarse structure of the copper net can be improved; and the PDEAEMA-CTA and PDMS are modified on the surface of the copper net,so that the surface of the copper net simultaneously has the super-hydrophobic characteristic and the intelligent hydrophilic and hydrophobic switching characteristic under the response of CO2, and the surface durability is improved by using the PDMS. By adopting the copper net prepared by the method provided by the invention, the switching of the super-hydrophobic property and the super-hydrophilic property can be realized in 5 min to 15 min.

The invention relates to a preparation method of a carbon dioxide responded graphene nano hybrid material, which comprises the following steps of reacting 5,10,15,20-tetrakis(4-aminophenyl)-21H,23H-porphine with 1,1-dimethoxy-N,N-dimethylethylamine so as to obtain 5,10,15,20-tetrakis(4-phenyl-N,N-dimethyl-N''-acetamidine bicarbonate)-21H,23H-porphine; and then, adding grapheme, so that molecules of the 5,10,15,20-tetrakis(4-phenyl-N,N-dimethyl-N''-acetamidine bicarbonate)-21H,23H-porphine are coupled on the surface of the grapheme, and then a grapheme-5,10,15,20-tetrakis(4-phenyl-N,N-dimethyl-N''-acetamidine bicarbonate)-21H,23H-porphine nano hybrid material is formed. The grapheme hybrid material prepared according to the invention has carbon dioxide responsiveness, and the dispersion of the hybrid material in an aqueous solution can be reversibly regulated through feeding carbon dioxide or argon into the aqueous solution, and therefore, the hybrid material has wide applications in the fields of drug controlled release carriers, intelligent switches, intelligent sensors, biological nano-devices and the like. The preparation method disclosed by the invention is simple and practicable, and raw materials can be subjected to industrialized production, and therefore, the preparation method has good popularization and application values.

The invention discloses a method for rapidly obtaining a supplementing and recycling quota of plant inorganic carbon and belongs to the field of a crop information detection technology, afforestationand ecological environment management. The method comprises the following steps: determining a carbon dioxide response curve of photosynthesis of plant leaves by utilizing a portable photosynthetic apparatus; obtaining a relation equation between a net photosynthetic rate and extracellular atmospheric carbon dioxide concentration, and a relation equation between the net photosynthetic rate and intercellular carbon dioxide concentration; deriving the equations to obtain carboxylation efficiency of the plant leaves with the extracellular atmospheric carbon dioxide concentration of 100mu mol*mol<-1> on the extracellular atmospheric carbon dioxide and the intercellular atmospheric carbon dioxide, so as to obtain a direct utilization quota of atmospheric carbon dioxide of plants and the supplementing and recycling quota of the plant inorganic carbon. Meanwhile, the quota of recycled organic carbon of the plants can be obtained by directly utilizing a known bicarbonate ion utilization quotaand a plant atmospheric carbon dioxide direction utilization quota; or the bicarbonate ion utilization quota of the plants is obtained according to a known plant organic carbon recycling quota.

The invention provides a polymer surfactant with efficient carbon dioxide responsiveness and a preparation method, and belongs to the field of preparation of surfactants. The preparation method comprises the steps as follows: DMAEMA (2-(dimethylamino)ethyl methacrylate) and sodium ethanesulfonate are mixed in water, APS (ammonium persulphate) is added, the mixture reacts for 4 hours at 80 DEG C, a reaction solution is extracted, subjected to impurity removal and vacuum solvent removal and dried at 50 DEG C, and the polymer surfactant with efficient carbon dioxide responsiveness is obtained. The polymer surfactant and the preparation method have the advantages that the preparation method is simple, the cost is low, a material has good stability, the prepared polymer surfactant has excellent carbon dioxide responsiveness, and the polymer surfactant can be applied to development of low-quality petroleum resources such as heavy oil and the like.

The invention provides a full-biodegradable high-temperature-resistant modified carbon dioxide-based transparent straw which is characterized by being prepared from the following raw materials in parts by weight: 5 to 10 parts of carbon dioxide-based PPC (Polypropylene Chloride), 20 to 35 parts of PLA, 60 to 70 parts of PBS, 0.2-0.3 part of dispersing agent, 0.1-0.3 part of bulking agent and 0.1-0.3 part of lubricating agent. The invention further discloses a preparation method of the full-biodegradable high-temperature-resistant modified carbon dioxide-based transparent straw. The full-biodegradable high-temperature-resistant modified carbon dioxide-based transparent straw is excellent in heat resistance, good in mechanical property, high in stiffness and transparency and good in degradability, can consume carbon dioxide causing a greenhouse effect, responds to the Chinese proposal of zero carbon, and solves the problem of global white pollution.

The invention relates to a preparation method of hydrogel for adsorbing anionic dye and metal ions by carbon dioxide response expansion. The method comprises the following steps: stirring diethyl amino ethyl methacrylate, N-N methylene bisacrylamide, a polyether compound, an acid, an initiator, and water according to a certain proportion to form a mixed solution; slowly dropwise adding methylbenzene into the mixed solution, then adding a polymerization accelerator, polymerizing at a certain reaction temperature, and neutralizing with an alkaline solution after polymerization to form the hydrogel for adsorbing anionic dye and metal ions by carbon dioxide response expansion. The prepared gel can realize reversible transformation of expansion and contraction under the cyclic stimulation of carbon dioxide and nitrogen. The gel has high adsorption capacity for anionic dyes and metal ions. The adsorbed dye can be released in an alkaline environment, and the release rate is higher than 85%. The hydrogel has a huge potential application value in the fields of environmental wastewater treatment.

The invention relates to a preparation method and application of a CO2 responsive micro-nano drug delivery system, which can effectively achieve the effects of improvement of lung deposition capability, reduction of systemic distribution of drugs, reduction of systemic toxic and side effects, responsive slow release in the lung, and improvement of drug utilization and curative effect. The preparation method comprises the following steps: preparing a polylactic acid-polylysine polymer; dissolving the polylactic acid-polylysine polymer in dimethyl sulfoxide, then adding N, N-dimethylacetamide dimethyl acetal, carrying out a nitrogen protection reaction, dialysis and freeze-drying, dissolving the obtained solution and budesonide in dimethyl sulfoxide, adding ultrapure water, and carrying out dialysis and freeze-drying to obtain PLA-mPLL / BUD nanoparticles; preparing yeast microcapsules, dissolving the PLA-mPLL / BUD nanoparticles in ultrapure water, adding the yeast microcapsules, carrying out vortex uniform mixing, carrying out room temperature incubation, centrifuging, and carrying out freeze drying to obtain the CO2 responsive micro-nano drug delivery system YGM / PLA-mPLL / BUD. The preparation method is simple, raw materials are rich, production and preparation are easy, and the system is a great innovation in medicines for treating asthma, pulmonary fibrosis, chronic pulmonary obstruction pulmonary disease, pneumonia and lung injury.

The invention provides a full-biodegradable high-strength polylactic acid-based injection molding special material. The material is characterized by being prepared from the following raw materials in parts by weight: 5 to 10 parts of carbon dioxide-based PPC, 60 to 70 parts of PLA, 20 to 25 parts of PBAT, 0.2 to 0.3 part of a dispersing agent, 0.1 to 0.3 part of ADR4468, 0.1 to 0.3 part of a lubricating agent and 3 to 5 parts of a filler. The invention also discloses a preparation method of the full-biodegradable high-strength polylactic acid-based injection molding special material. The full-biodegradable high-strength polylactic acid-based injection molding special material disclosed by the invention is excellent in heat resistance, good in mechanical property, high in stiffness and good in degradability; and under the composting condition, the material can be completely degraded to generate carbon dioxide and water, meanwhile, a carbon dioxide-based PPC raw material is used, carbon dioxide is consumed, the proposal of national carbon neutralization is responded, and the problem of global white pollution is effectively solved.

The invention provides a preparation method of a CO2 responsive regular mesh material. The method comprises the following steps: (1) dissolving a polymer and a CO2 responsive compound into a solvent to obtain an uniform solution; (2) dropwise adding the prepared solution to the surface of a substrate; and arranging the substrate on a rotating platform of a spin coater; (3) charging air into the spin coater; blowing the solution from the right above through the air stream; controlling the rate of the charged air, and the temperature and the relative humidity in a chamber of the spin coater; andstarting the spin coater, and controlling the rotating speed; and (4) stopping the rotating of the spin coater after the solvent is completely volatilized; and moving out the substrate to obtain theregular mesh material. The method is simple, quick and efficient; in addition, the regular mesh material with different pore diameters and different CO2 responding degrees can be prepared by simply adjusting the preparation parameters.

The invention relates to a preparation method of an intelligent coating with carbon dioxide stimulation responsiveness, belongs to the technical field of composite preparation and provides the preparation method of the intelligent coating with carbon dioxide stimulation responsiveness to overcome the defects in the prior art. A corrosion inhibitor is supported by use of the characteristic of largepore volume of mesoporous silica, and a polymer shell with carbon dioxide stimulation responsiveness is polymerized on the surface of mesoporous silica with a distillation and precipitation polymerization method, so that controllable release of a functional nano container under stimulation of carbon dioxide is realized; the nano container with carbon dioxide stimulation responsiveness is added toa coating, and the intelligent coating with carbon dioxide stimulation responsiveness is prepared. When the prepared intelligent coating is corroded by carbon dioxide in an oil-gas field developmentprocess, corrosion inhibitor molecules in the nano container can be released automatically to repair the damaged coating, so that the corrosion rate of a pipeline is greatly reduced, and safety accidents can be prevented.

The invention discloses a carbon dioxide response self-thickening intelligent fluid based on supramolecular self-assembly. The carbon dioxide response self-thickening intelligent fluid comprises a Gemini surfactant, a single-chain amide molecule with a tertiary amine head group and water; the Gemini surfactant and the single-chain amide molecule with the tertiary amine head group are self-assembled to form a vesicle structure which is dispersed in water; and the hydrophilic head group is arranged outside, and the hydrophobic tail part is arranged inside. The preparation method of the carbon dioxide response self-thickening intelligent fluid is simple, and the injection viscosity is low. The fluid is converted into gel after encountering carbon dioxide, and the viscosity is greatly increased. The problem that when the recovery ratio is increased through carbon dioxide gas drive of a low-permeability reservoir, gas flows along a local high-permeability channel, and consequently the swept volume is greatly reduced is effectively solved.

The invention provides a method for extracting and separating grease from seaweed, comprising the following steps: S1, mixing the seaweed, a deep eutectic solvent and an inorganic salt solution for grease extraction; s2, after grease extraction of the to-be-constructed three-phase separation system is completed, performing solid-liquid separation to obtain a mixed solution, and feeding carbon dioxide into the mixed solution for separation and recovery, wherein the eutecticevaporate solvent is a carbon dioxide response type eutecticevaporate solvent, and wherein the inorganic salt is at least one of soluble sulfate, phosphate and carbonate. The method comprises the following steps: constructing a three-phase separation system by adopting a carbon dioxide response type eutectic solvent to extract algae; after the extraction is completed, introducing carbon dioxide to separate the grease, the deep-eutectic solvent and the water phase; therefore, grease extraction and separation of the deep-eutectic solvent, the grease and the water phase are realized, and the deep-eutectic solvent is recovered for cyclic utilization.

The invention discloses an aggregation-induced emission material as well as a preparation method and application thereof. The aggregation-induced emission material has good response performance to carbon dioxide and has a structural formula shown as a formula (I), L1, L2, L3 and L4 are independently selected from any one of hydrogen atoms, amidino and guanidino, and L1, L2, L3 and L4 are not hydrogen atoms at the same time. The aggregation-induced emission material can be used as a good carbon dioxide fluorescent probe molecule; the material is a compound containing tetraphenyl ethylene and amidino / guanidino. The property that the amidino / guanidino can specifically respond to the carbon dioxide and the property that the structure can form a more stable conjugated structure after reacting with carbon dioxide are utilized; compared with the mode that tetraphenyl ethylene and amidino / guanidino compounds are independently mixed, quicker response can be achieved, and good application prospects are achieved in the field of carbon dioxide gas detection.

The present disclosure relates to a carbon dioxide detector having a borosilicate substrate. It may also have a carbon dioxide responsive indicator solution disposed on the borosilicate substrate. The carbon dioxide detector may be part of a carbon dioxide detector system also including an air intake operably connected to the housing to allow air to reach the carbon dioxide detector. The carbon dioxide detector may include a borosilicate substrate and a carbon dioxide responsive indicator solution disposed on the borosilicate substrate. This detector may be part of a further system, such as a resuscitation system. The detector may be made by wetting a borosilicate substrate with a carbon dioxide responsive indicator solution and drying the indicator solution to immobilize it and form a dried carbon dioxide detector. It may be used to detect the concentration of carbon dioxide in an air sample by exposing the detector to the sample.

The invention discloses a dense oil reservoir CO2 flooding multi-scale channeling control system and a preparation method; the dense oil reservoir CO2 flooding multi-scale channeling control system comprises a nanoscale CO2 responsive wormlike micelle system and a micron-scale CO2 responsive dispersion adhesive, wherein the nanoscale CO2 responsive wormlike micelle system is prepared by stirring a CO2 responsive monomer and an organic counter ion monomer in water; the micron-sized CO2 responsive dispersion adhesive is prepared by cross-linking acrylamide, a responsive monomer and a silane coupling agent modified hydroxylated multi-walled carbon nanotube as raw materials in water. The dense oil reservoir CO2 flooding multi-scale channeling control system has high mobility control ability in the CO2 displacement process, and high-strength carbon nanotubes are introduced into the micron-sized CO2 responsive dispersion glue, so that the strength and long-term stability of the dispersion glue are effectively improved, and the plugging effect on cracks is obviously enhanced. In addition, after CO2 in the system is replaced, the wormlike micelles are recovered into spherical micelles, and good response reversibility is achieved.

The invention relates to the field of high-molecular chemistry and especially relates to a crosslinking agent, a preparation method and an application thereof, and a CO2-responding polymer formed by the crosslinking agent. The crosslinking agent is a compound represented as the structure formula (I) and has the two functional groups including a methacryloyl group and a diethylamine group at the same time, so that on one hand, the methacryloyl group, as a crosslinking chemical group which acts on a hydroxyl group in polyvinyl alcohol, can form a polymer with the polyvinyl alcohol as a frame in a crosslinking manner, and on the other end, the diethylamine group acts on CO2 to form a polymer which serves as the CO2-responding polymer.