38 results about "Phenolphtaleine" patented technology

The invention relates to the technical field of environmental analytical chemistry, and discloses a thymol phenolphthalein-TBPE double indicator-based cyanide titration detection method and system, and the method comprises the following steps: adjusting a water sample to be detected to an alkaline pH interval to construct a detection matrix; the method comprises the following steps: introducing a double-indicator system composed of thymol phenolphthalein and tetrabromo phenolphthalein ethyl ester according to a specific ratio into a detection matrix, and constructing a spectrum background for masking yellow interference of sulfide by utilizing the blue color development characteristic of thymol phenolphthalein; dropwise adding a silver nitrate standard solution into the mixed system to execute a complex reaction; according to the method, a spectrum background shielding field is constructed, chromaticity response of a system in a specific wave band is monitored in real time, and when a chromaticity mutation signal from green to bluish violet is captured, a titration end point is judged, and the cyanide concentration is calculated. High-precision anti-interference detection on cyanide in a complex high-turbidity matrix is realized, and the sensitivity and accuracy of end point recognition are improved.

This invention discloses a high-modulus, high-toughness bismaleimide resin composition, a carbon fiber prepreg, and a preparation method thereof, belonging to the field of composite material technology. The bismaleimide resin composition of this invention comprises the following raw materials in parts by weight: 40-80 parts bismaleimide resin, 10-20 parts o-diallyl bisphenol A, and 5-10 parts a powder toughening agent containing phenolphthalein side chains. The carbon fiber prepreg of this invention is made from the above resin composition and carbon fibers, with thermoplastic polyimide felt interlayered to form an integrated structure. This allows the composite material prepared from the carbon fiber prepreg to maintain high modulus and high temperature resistance while significantly improving its toughness, impact damage tolerance, and interlayer delamination resistance. Furthermore, the prepreg of this invention has good processability and is suitable for manufacturing high-performance complex components.

The invention relates to the technical field of concrete detection, in particular to an instrument for detecting concrete carbonization depth by using an imaging technology. According to the technical scheme, the device comprises a box body, a first cavity and a second cavity are formed in one side of the box body, holes of the specified size are punched in the wall face through a punching assembly, then residual concrete chippings in the holes are blown away through a cleaning assembly, the interiors of the holes are kept clean and tidy, then a phenolphthalein alcohol solution is added into a storage frame, and the phenolphthalein alcohol solution is stored in the storage frame; the phenolphthalein alcohol solution is sprayed into the hole through the spraying assembly, the color of the concrete contaminated with the phenolphthalein alcohol solution can be changed due to different pH values, so that the color of the uncarbonized concrete is changed, then the detection assembly extends into the hole, and the color-changing part in the hole is detected by utilizing an imaging technology; and digital images and depth data are obtained and are convenient to analyze and store, so that the problem of detection result deviation easily caused by sight obstruction during detection is solved.

The present invention aims to provide a cell inoculum and a cell transplantation substrate which can be subcultured without causing cell transformation and can effectively implant cells. An inoculum and a transplantation substrate containing a phenolphthalein derivative for facilitating implantation of cultured corneal endothelial cells or corneal endothelial replacement cells. The inoculum and the transplantation substrate can facilitate adhesion of cells during subculture and implantation of cells during transplantation.

The application relates to the technical field of processing and preparation of wood-based functional materials, and particularly discloses a wood-based friction material with a service life self-monitoring function and a preparation method thereof, which comprises the following steps: dispersing poplar powder in a co-solvent formed by mixing choline chloride and dihydroxide oxalic acid to obtain a mixed liquid, diluting and washing with water to obtain filter residue A; dispersing the filter residue A in distilled water I, adding sodium chlorite and acetic acid, stirring, and washing with water to obtain filter residue B; dispersing the filter residue B in distilled water II, adding phenolphthalein, and crushing to obtain a dispersion liquid; adding sodium chloride, solid Tris and tannic acid into the dispersion liquid, stirring, and washing with water to obtain filter residue C; dispersing the filter residue C in distilled water III, adding polyvinyl alcohol, stirring, pouring into a mold, and drying; dispersing the filter residue A in distilled water, adding sodium hydroxide and polyvinyl alcohol, stirring to obtain a mixed base liquid, continuously pouring into the mold, and drying to obtain the wood-based friction material. The friction material has the service life self-monitoring function, and the method is simple and low in cost.

The application provides a crosslinked thermal rearrangement polybenzoxazole hollow fiber gas separation membrane and a preparation method and application thereof, and belongs to the technical field of polymer membrane separation. In the synthesis of the polymer, a phenolphthalein-based diamine monomer with a lactone ring is introduced, so that the phenolphthalein-based diamine monomer is polycondensed with a dianhydride to form a polyimide, and then the polyimide is prepared into a hollow fiber membrane precursor, and then crosslinking is performed at a lower temperature, and then the temperature is further increased to prepare a thermal rearrangement hollow fiber membrane. At this time, the polymer chains are crosslinked, the flowability is hindered, the thickening degree of the skin layer is greatly reduced, and the plasticization resistance is also improved.

The purpose of the present invention is to maintain the activity of an enzyme while reducing proliferation of microorganisms that cause food deterioration in a state where the enzyme is dissolved in water. The present invention provides a food composition that satisfies all of the following requirements (a)-(d). (a) The moisture content in terms of wet mass is 20 mass% or more. (b) The pH at 20°C and 1 atm is more than 4.0. (c) The titratable acidity of the food composition when measured by a measurement method A is 0.1 mass% or more. Measurement method A 10 g of the food composition is accurately collected and diluted 10-fold with ion-exchanged water, 0.08 ml of a 3.1% phenolphthalein solution serving as an indicator is added to the diluted solution (100 g), the resulting solution is neutralized by titration with a 0.1 mol / L sodium hydroxide liquid having a known titer, and the titratable acidity is determined by the following formula.　Titratable acidity (mass%) of food composition={(60.05×0.1×F×V)×100} / {collection quantity (10 g)×1000} 60.05: Molecular weight of acetic acid 0.1: Molar concentration (mol / L) of sodium hydroxide solution F: Titer of 0.1 mol / L sodium hydroxide solution V: Titration amount (mL) of 0.1 mol / L sodium hydroxide (d) The following requirements (i) and / or (ii) are satisfied. Requirement (i) The following formula is satisfied: 4Y+X≥10 (provided that X≥3 and Y>0.03 are satisfied), where X g represents the amount of sodium chloride equivalent per 100 g of water of the food composition, and Y g represents the content of non-dissociated acetic acid per 100 g of water of the food composition. Requirement (ii) The amount of sodium chloride equivalent per 100 g of water of the food composition is 3.0 g or more, and the ethanol content per 100 g of water of the food composition is 8.0 g or more.

The application discloses a reaction type thermoplastic resin with a large free volume, a preparation method and a bismaleimide resin composition, and belongs to the technical field of polymer material toughening. N 2 a nucleophilic polycondensation reaction to obtain a polyaryletherketone / sulfone copolymer containing a reaction type group, wherein the bisphenol compound is selected from one or more of phenolphthalein, thymolphthalein, bisphenol fluorene and isoindolinone-based bisphenol. The application introduces a bisphenol compound with a large side group into the molecular chain of the thermoplastic resin to construct a large free volume structure, and simultaneously utilizes TGSH to provide an active propenyl group, so that the resin can participate in the curing and cross-linking reaction of bismaleimide. The bismaleimide resin composition using the resin as a toughening agent has a significantly improved toughness after curing.

The invention relates to the field of pipes, and discloses a high-temperature-resistant MPP pipe and a preparation method thereof.The high-temperature-resistant MPP pipe comprises polypropylene resin, modified inorganic filler, a functional additive, ammonium polyphosphate and auxiliaries; the modified inorganic filler is prepared by grafting phenolphthalein POSS-based benzoxazine on the surface of the inorganic filler; the phenolphthalein POSS-based benzoxazine is prepared from a phenolphthalein silane coupling agent, paraformaldehyde and monoamino polyhedral oligomeric silsesquioxane through Mannich condensation reaction, wherein the phenolphthalein silane coupling agent is prepared by reacting phenolphthalein with 3-isocyanate propyl trimethoxy silane; the paraformaldehyde and the monoamino polyhedral oligomeric silsesquioxane are subjected to Mannich condensation reaction; according to the functional additive, phosphorus oxychloride is sequentially subjected to substitution with pentaerythritol phosphate and anhydrous piperazine to prepare a piperazinyl phosphorus-containing intermediate, then the piperazinyl phosphorus-containing intermediate and chloroacetyl chloride are subjected to substitution, and then the piperazinyl phosphorus-containing intermediate and dodecyl dimethyl tertiary amine continue to react to prepare the functional additive. The pipe is endowed with good mechanical property, high temperature resistance, flame retardance, water resistance and antibacterial property.

The invention discloses a phenolphthalein polyaryletherketone nano composite material and a preparation method thereof, the composite material comprises the following components by mass: 50-70 wt% of a phenolphthalein polyaryletherketone (PEK-C) matrix, 10-30 wt% of a nano filler, 5-15 wt% of a flexibilizer, 1-5 wt% of an antioxidant, and 1-3 wt% of a processing aid, wherein all the components are physically mixed to form a uniformly dispersed integral structure, and the preparation method comprises the following steps: S1, pre-mixing the phenolphthalein polyaryletherketone matrix and the nano filler in a high-speed mixer; s2, adding the premixed materials into a double-screw extruder, and carrying out melt blending; s3, adding a toughening agent, an antioxidant and a processing aid in the extrusion process, and continuously mixing; and S4, cooling and pelletizing the extruded material to obtain the nano composite material particles. The invention belongs to the field of high polymer materials, and particularly relates to a phenolphthalein polyaryletherketone nanocomposite and a preparation method thereof.

The application discloses a preparation method and application of a phenolphthalein intercalated ammonium vanadate material. The phenolphthalein intercalated ammonium vanadate material is synthesized by a one-step solvothermal method, ammonium metavanadate is used as a vanadium source, a mixed solution of ethylene glycol and water is used as a reaction medium, and oxalic acid is used as a reducing agent, so that the phenolphthalein intercalated ammonium vanadate material is obtained under a solvothermal condition. The phenolphthalein molecules between layers of the material play a role of a support, and the hydrophobic phenolphthalein molecules can reduce direct contact between the material and water molecules, inhibit structural collapse and dissolution of the material in a cycle process and the like, and the material is applied to a water-based zinc ion battery as a positive electrode material, so that more excellent electrochemical performance and cycle stability are obtained.

The invention relates to the technical field of concrete detection, and discloses a concrete carbonization tester which comprises a tester body and a cover plate located at the rear end of the tester body, a nozzle is installed at the upper end of one side of the tester body, and a camera, a light supplementing lamp and a distance measuring probe are installed on the side, away from the nozzle, of the upper end of the tester body. A solvent in the solvent conveying mechanism and a solute in the solute conveying mechanism are mixed in the mixed liquid spraying mechanism to form a detection solution; spraying a phenolphthalein solution into the hole from the nozzle; the color of the carbonized part and the uncarbonized part is changed; the distance between the color-changing junction and the surface of the concrete is detected through the distance measuring probe, so that the specific carbonization depth can be measured; when the distance measuring probe measures the distance, the camera can shoot an image in the hole, and the image is displayed on the display screen, so that a color-changing junction can be accurately positioned; the tester can realize automatic batching and automatic detection.

The invention discloses a water conservancy gate detection device, which comprises an outer frame, and further comprises an execution device comprising a drilling assembly and a sealing disc; the liquid guide cylinder is fixedly connected to the inner wall of the sealing disc and is used for filling a phenolphthalein solution; the carbonization depth measuring scale is mounted at one end, positioned on the wall body to be measured, of the sealing disc and is used for measuring the carbonization depth of the drilled wall body; the driving motor is mounted at one end, opposite to the sealing disc, of the outer frame and is used for driving the drilling assembly, the liquid guide cylinder and the carbonization depth measuring scale to perform position switching; and a negative pressure adsorption device. The negative pressure adsorption device and the execution device are arranged, the whole process functions of punching, color development and measurement are integrated, a drilling assembly is arranged in the execution device, a measurement hole site meeting the requirement can be punched in a to-be-measured wall surface, a special phenolphthalein solution can be sprayed out of the hole site through a liquid guide cylinder, the hole site after color development can be detected through a carbonization depth measuring ruler, and the measurement accuracy is improved. Divers do not need to frequently replace tools.

The application discloses a method for detecting the acidity of a circulating solution of electro-deposited cobalt, which comprises the following steps: removing oxidizing substances in the circulating solution of electro-deposited cobalt by potassium iodide in an acidic medium; reacting the potassium iodide with potassium iodate and acid to generate iodine molecules; titrating with a sodium thiosulfate standard solution until the solution changes from blue or blue-black to the original color of the solution, which is the end point; and calculating the acidity content according to the mass balance. The method can effectively remove the oxidizing substances in the solution to be measured, avoid the interference with the determination of the acidity content, and make the detection result more accurate. The sodium thiosulfate is innovatively applied to the detection of the acidity of the circulating solution of electro-deposited cobalt, and the sodium thiosulfate titration is used to replace the commonly used sodium hydroxide titration method, so that the interference of the original color of the light red solution with the color judgment of the end point of the sodium hydroxide (phenolphthalein as an indicator) is avoided.

The invention relates to the technical field of lithium ion battery positive electrode material detection, in particular to a method for measuring the content of soluble lithium in a lithium manganate finished product, which comprises the following steps of: taking 5g of lithium manganate finished product sample, putting into a 250mL beaker, adding 50mL of purified water and a magnetic stirrer, covering, stirring for 20 minutes at the rotating speed of 550r / min, standing for 2 minutes, and filtering supernate by two layers of filter paper; transferring 10 mL of filtrate to a 250 mL conical flask, adding 40 mL of purified water, firstly adding 2 drops of phenolphthalein, titrating with 0.0104 mol / L hydrochloric acid until the solution is colorless (denoted as v1), then adding 3 drops of methyl red, continuously titrating until the solution is orange, boiling for 1 min, cooling, titrating until the solution is wine red (denoted as v2), and calculating according to the formula that the content of lithium carbonate is equal to (v2-v1) * 0.0104 * 73.886 / m; the method for determining the content of soluble lithium in the lithium manganate finished product is simple and accurate to operate, rapid and efficient, can optimize the process, saves time and labor, can determine the quality of soluble lithium so as to judge the performance of a material body in advance, and ensures the production of high-quality lithium manganate.

The invention discloses a preparation method of a recyclable phenolphthalein polyaryletherketone composite material, which comprises the following steps: selecting 65% of phenolphthalein polyaryletherketone resin (PEK-C) as a base material; 15% of carbon fibers, 10% of glass fibers, 8% of ceramic particles and 2% of metal powder are selected as reinforcing materials; a matrix material and a reinforcing material are uniformly mixed, it is ensured that the matrix material can completely permeate into the reinforcing material to form a stable composite material, and when the matrix material and the reinforcing material are uniformly mixed, a recycling agent is selected and added into the mixed composite material, so that the viscosity of resin can be effectively reduced in the recycling process of the composite material; the resin is promoted to be degraded into small molecular units so as to promote the degradation of the resin. The invention relates to the technical field of polymer composite material processing, and the composite material can be conveniently recycled while ensuring excellent physical and chemical properties, so that environmental pollution is reduced, and a new way is provided for realizing sustainable utilization of resources.

The invention relates to the technical field of polymeric membrane separation, in particular to a phenolphthalein-based polybenzoxazole membrane as well as a preparation method and application thereof. The invention provides a phenolphthalein-based polybenzoxazole membrane which has a structural formula as shown in a formula I. A polymer is synthesized by adopting a one-step method, esterification crosslinking and thermal rearrangement methods, phenolphthalein-based diamine is selected as one of diamine monomers, phenolphthalein-based diamine contains a large number of benzene rings, and the thermal stability of the polymer can be improved; the monomer contains a-COOH group and can be crosslinked through an ester group, so that the polyimide film keeps good mechanical properties under the condition that the plasticizing resistance is improved; meanwhile, the monomer also contains phenolic hydroxyl groups, so that a thermal rearrangement reaction can be further carried out after esterification crosslinking of a polyimide film, and a polybenzoxazole film with a more distorted and more rigid structure is formed.

The invention discloses a low-dielectric-loss hydrocarbon resin glue solution for a copper-clad plate and a preparation method of the low-dielectric-loss hydrocarbon resin glue solution, and relates to the technical field of copper-clad plates. 1, 2-polybutadiene and a hydrogenated styrene-butadiene block copolymer are compounded to guarantee low dielectric loss; hydrocarbon resin is introduced into a cyanate ester-bismaleimide-benzoxazine resin system to prepare a composite resin system, bisphenol A cyanate ester is pre-polymerized under catalysis of zinc acetylacetonate, a triazine ring structure is formed through trimerization, the glass transition temperature is increased, the dielectric constant is reduced, phenolphthalein polyarylether sulfone improves toughness and impact strength, and the dielectric constant is reduced. Bismaleimide is added to improve the adhesive force and thermal stability, and benzoxazine is subjected to ring-opening polymerization to provide phenolic hydroxyl groups and secondary amine which participate in crosslinking to form a low-dielectric thermosetting network. The modified ammonium polyphosphate and the silica powder form a heat insulation layer, phosphorus-silicon synergistic flame retardance is formed, and UL-94V-0-level flame retardance is achieved. The copper-clad plate provided by the invention is especially suitable for the high-end fields of 5G high-frequency copper-clad plates, aerospace thermal protection coatings and the like.

The invention discloses cross-linking type polyaryletherketone resin and a preparation method and application thereof, and the cross-linking type polyaryletherketone resin comprises polyaryletherketone resin and a dihydroxyl cross-linking agent as shown in a structural formula (I). In the structural formula (I), R1-R8 are respectively and independently hydrogen or alkyl with less than 10 carbons. The polymerization degree of the polyaryletherketone resin is 30 to 700. The polyaryletherketone resin is at least one of polyether ketone, polyether ether ketone, polyether ketone ketone, polyether ether ketone ketone, polyether ketone ether ketone ketone and phenolphthalein polyaryletherketone. The cross-linked polyaryletherketone resin provided by the invention is easy to melt and process and high in thermal deformation temperature, and a sealing element made of the cross-linked polyaryletherketone resin has excellent thermal stability and high creep resistance, and can maintain mechanical properties for a long time when used in a high-temperature and high-pressure environment.

The application relates to the field of visual detection of metals, and particularly relates to a preparation method, product and application of nitrogen-sulfur co-doped carbon quantum dots. The preparation method of the nitrogen-sulfur co-doped carbon quantum dots comprises the following steps: phenolphthalein, m-phenylenediamine and glutathione are dissolved in an alkali solution to perform a hydrothermal reaction; after the hydrothermal reaction is completed, filtration, dialysis and freeze-drying are sequentially performed to obtain the nitrogen-sulfur co-doped carbon quantum dots. Phenolphthalein is used as a precursor, m-phenylenediamine and glutathione are respectively used as a nitrogen source and a sulfur source to synthesize nitrogen-sulfur co-doped carbon quantum dots (NS-CDs). The preparation method is simple, the quantum yield of the NS-CDs prepared by using the method reaches 71.16%, and the result is higher than that of most reported blue fluorescent carbon dots. The NS-CDs prepared by using the method can be successfully applied in the visual detection of Cr 6+ and Mn 7+ .

The application discloses a kind of side group containing halogen diphenol compound and its preparation method and application.The preparation method includes the following steps: step 1, phenothiazine and aromatic primary amine derivative hydrochloride are dissolved in aromatic primary amine derivative, ammonolysis reaction, quenching separation, obtain halogen-containing 2-aryl-3,3-bis (hydroxyaryl) benzopyrrolone derivative crude product;Step 2, the halogen-containing 2-aryl-3,3-bis (hydroxyaryl) benzopyrrolone derivative crude product is purified to obtain the halogen-containing 2-aryl-3,3-bis (hydroxyaryl) benzopyrrolone derivative.The halogen-containing 2-aryl-3,3-bis (hydroxyaryl) benzopyrrolone derivative obtained by the above preparation method is higher than 60%, the purity after purification is higher than 98%, raw material is easy to obtain, process is simple, and it is suitable for industrial production.

The application discloses a low-energy- consumption phenolphthalein polyaryletherketone polymerization process, comprising the following steps: mixing phenolphthalein monomer, 4,4'-difluorobenzophenone monomer and a catalyst in a certain proportion; performing a prepolymerization reaction under low temperature and normal pressure to generate a low-molecular-weight prepolymer; transferring the low-molecular-weight prepolymer into a high-temperature reaction kettle, performing a main polymerization reaction under high temperature and medium pressure, and adding a viscosity-reducing additive in the reaction process; and cooling, crushing, washing and drying the product to obtain a phenolphthalein polyaryletherketone product. The application belongs to the technical field of high polymer material synthesis, and specifically provides a process for solving the problems of high melt viscosity, high energy consumption and low reaction efficiency in the prior art; the process has the advantages of low melt viscosity, low energy consumption, high reaction efficiency and the like, and can significantly improve the production efficiency and quality of the phenolphthalein polyaryletherketone.

The invention belongs to the field of high polymer materials, and discloses a method for preparing a phenolphthalein-based polyaryletherketone nanofiber membrane based on electrostatic spinning of a bio-based cyclic lactone green solvent system. The bio-based cyclic lactone green solvent is adopted as the electrostatic spinning solvent of phenolphthalein polyaryletherketone, a matched process window is matched, green and environment-friendly production is achieved, and the obtained nanofiber membrane is uniform in fiber morphology and excellent in performance and has application prospects in the fields of separation and filtration, energy environmental protection and the like.

This application relates to the field of cable technology, specifically disclosing a surface abrasion-resistant cable and its preparation method. The surface abrasion-resistant cable comprises, from the inside out, a conductor, an insulation layer, a protective layer, and an abrasion-resistant coating. The raw materials for preparing the abrasion-resistant coating include polyarylene ether nitrile ketone, modified filler, antioxidant, anti-oxidant, and organosilicon masterbatch. The modified filler is composed of graphene nanosheets and silicon carbide micropowder, which react with 2,6-difluorobenzonitrile, phenolphthalein, and potassium 2,5-dihydroxybenzenesulfonate to form sulfonated polyarylene ether nitrile. This modification of the composite filler not only increases the surface hardness of the coating and enhances its abrasion resistance, but also promotes good dispersion of the nanofiller in the coating, ensuring good bonding between the filler particles and the matrix, resulting in a strong transfer film and thus exhibiting excellent abrasion resistance.

The invention discloses a reagent for rapidly detecting the alkalinity of industrial boiler water and application of the reagent, and belongs to the technical field of water quality analytical chemistry. The alkalinity reagent is divided into a phenolphthalein alkalinity reagent A, a phenolphthalein alkalinity reagent B, a total alkalinity reagent C and a total alkalinity reagent D. A water quality limit value-sample amount-reagent amount three-dimensional control detection system is constructed, two levels are set for each dimension, and the two levels of the two dimensions of the sample amount and the reagent amount are designed into a multiple relationship, so that the reagent purchasing problem can be solved, precursor components do not exist, purchasing does not need special examination and approval, visual detection can be performed, and the reagent purchasing efficiency is improved. The color of the end point is easy to distinguish, pertinence is high, boiler blowdown is guided, and energy conservation and emission reduction are

The application discloses a kind of detection methods for battery grade lithium salt purity, called lithium salt is placed in conical flask stirring dissolution;In the first solution to be measured, drop methyl red-bromocresol green indicator is added, and titrated with hydrochloric acid standard titration solution to wine red;Second solution to be measured, drop phenothalin indicator is added, and titrated with methyl red-bromocresol green indicator to wine red;Finally, the purity percentage of lithium salt is calculated.The detection method of the application can be effectively used for the analysis and detection of battery grade lithium carbonate, lithium hydroxide monohydrate and lithium oxide.Compared with the traditional method, the sample consumption is less, the hydrochloric acid consumption is less, and it is more environmentally friendly.Meanwhile, it can effectively solve the problem that the influence of carbonate ion consumption of hydrochloric acid is not considered in the traditional national standard, thereby improving the accuracy of detection.Meanwhile, the method can also be effectively used for the analysis and detection of battery grade lithium oxide.

The invention discloses a water-based thermoplastic sizing agent doped with a nano material as well as a preparation method and application of the water-based thermoplastic sizing agent, and belongs to the technical field of composite materials. According to the sizing agent, a bisphenol compound-diphenolic acid-dihalogen benzophenone / sulfone copolymer is used as matrix resin, a carboxyl-containing polyaryletherketone / sulfone copolymer is synthesized through SN2 nucleophilic condensation polymerization, the carboxyl-containing polyaryletherketone / sulfone copolymer is prepared into the water-based sizing agent by adopting an emulsion / solvent evaporation method, and nano materials such as graphene oxide and multi-walled carbon nanotubes are further doped. The sizing agent takes water as a dispersion medium, is green and environment-friendly, has excellent heat resistance, has good compatibility with phenolphthalein polyether ketone and other high-performance thermoplastic resins, and can significantly improve the interface bonding strength, interlaminar shear strength, bending strength and monofilament tensile strength of the carbon fiber composite material. The preparation process is simple and controllable, and is suitable for preparing high-performance carbon fiber composite materials in the fields of aerospace, mechano-electronics and the like.

The utility model relates to the technical field of bridge bearing capacity detection, in particular to bridge bearing capacity detection equipment. The bridge bearing capacity detection equipment provided by the utility model can be used for carrying out full-automatic detection on the strength value of concrete, reducing manual operation, saving manpower and time and improving the working efficiency. Bridge bearing capacity detection equipment comprises bottom wheels, a connecting frame, moving frames and the like, the left moving frame and the right moving frame are arranged, the front portion and the rear portion of the connecting frame are rotationally connected with the bottom wheels, and the upper portion of the left moving frame is connected with the connecting frame. The concrete rebound apparatus is controlled to move through the second electric push rod, the carbonation depth detector is controlled to move through the third electric push rod, the phenolphthalein reagent spray head is sprayed out by pressing the reagent bin, the bridge strength is evaluated through a carbonation value and a rebound value, full-automatic detection of the concrete strength value can be achieved, manual operation is reduced, and the detection efficiency is improved. Manpower and time are saved, and the working efficiency is improved.

The invention provides a method for determining the content of carbon dioxide fixed in steel slag, which comprises the following steps: sample reaction: carrying out heating reaction on a to-be-detected steel slag sample and phosphoric acid in a reaction bottle to release carbon dioxide fixed in the steel slag; carbon dioxide absorption: introducing the reacted gas into an absorption reaction bottle containing a potassium hydroxide solution to obtain an absorption liquid; titration analysis: sequentially adding a phenolphthalein indicator and a methyl orange indicator into the absorption liquid of the absorption reaction bottle, carrying out step-by-step titration by using a hydrochloric acid standard titration solution, and recording the volume of consumed hydrochloric acid; and content calculation: calculating the content of the fixed carbon dioxide in the steel slag based on the concentration of the hydrochloric acid standard titrating solution, the volume of the consumed hydrochloric acid standard titrating solution and the mass of the steel slag sample. The method can be used for accurately and rapidly measuring the carbon sequestration amount in the steel slag so as to evaluate the steel slag carbon sequestration effect or detect the operation effect of a steel slag carbon sequestration facility.

The invention discloses a preparation method for enhancing the spinning capability of LCP (Liquid Crystal Polymer) and application. The method comprises the following steps: firstly, carrying out acetylation reaction on p-phenylenediamine, terephthaloyl chloride, p-hydroxybenzoic acid, 2-hydroxy-6-naphthoic acid, acetic anhydride and 4, 4-biphenol to obtain a mixture of aromatic polyamide and acetylated monomers; carrying out ester exchange on the obtained S1 mixture and phenolphthalein under the action of a catalyst to obtain a mixture of liquid crystal copolyester and aromatic polyamide; finally, heating the mixture material of the liquid crystal copolyester and the aromatic polyamide; and extruding to obtain the functional master batch. Furthermore, the functional master batch can be prepared into the modified liquid crystal LCP fiber. According to the method, the LCP spinning process is simplified, while the product quality is guaranteed, the filamentation efficiency of liquid crystal macromolecules is improved, the production process is simplified, and the production cost is reduced.