928 results about "Phthalic acid" patented technology

The invention relates to the technical field of cables, and provides an anti-aging insulated power cable. A conductor layer and an anti-aging outer sheath layer are sequentially arranged from inside to outside. The anti-aging outer sheath layer is prepared from the following raw materials in parts by weight: 55 to 65 parts of PVC (Polyvinyl Chloride) resin, 20 to 30 parts of ethylene propylene diene monomer, 10 to 15 parts of ethylene-vinyl acetate copolymer, 10 to 12 parts of modified kaolin, 18 to 20 parts of diisononyl phthalate, 4 to 5 parts of calcium-zinc composite stabilizer, 1.5 to 2 parts of antioxidant, 0.5 to 1 part of polyethylene wax and 0.5 to 0.7 part of calcium stearate; the modified kaolin is obtained by coating the surface of kaolin with nano silicon dioxide to obtain SiO2-coated kaolin and grafting the SiO2-coated kaolin with an ultraviolet absorbent. According to the anti-aging insulated power cable prepared in the invention, the problem that the ultraviolet absorbent may be decomposed, volatilized or migrated to fail in long-term use is solved, and the anti-aging stability of the insulating material in long-term operation is improved.

The invention belongs to the field of conductive paste preparation, and particularly discloses conductive paste containing ruthenium oxide and a preparation method of the conductive paste. The conductive paste is prepared from the following components in percentage by mass: 40 percent to 50 percent of ruthenium oxide, 3.8 percent to 5 percent of carbon nano tubes, 5 percent to 10 percent of PbO-B2O3-SiO2, 3 percent to 8 percent of ethyl cellulose, 21 percent to 28 percent of terpilenol, 9 percent to 12 percent of butyl carbitol, 0.7 percent to 1 percent of ammonium polyacrylate and 1 percent to 2 percent of dibutyl phthalate. According to the preparation method, ruthenium oxide is activated in vacuum, a mixed solvent is combined after dispersion, and a ball milling and ultrasonic dispersion synergistic process is adopted, so that the slurry is uniformly dispersed and has excellent stability. According to the invention, a ruthenium oxide-carbon nanotube-frit ternary synergistic system is constructed, and terpilenol and butyl carbitol in a specific mass ratio are taken as a mixed solvent, so that the problems of insufficient conductivity and easy agglomeration of traditional paste are effectively solved, and the method can be widely applied to manufacturing of high-precision electronic devices.

The invention discloses a quick-curing polyurethane seamless expansion joint material for roads and a preparation method, and belongs to the technical field of road engineering materials. The material is prepared from polyether polyol, polycaprolactone glycol, a bisphenol A epoxy-polyether block isocyanate terminated prepolymer, a methyl phenyl silicon-boron hybrid hydroxyl chain extender, diphenylmethane diisocyanate, calcium carbonate, wollastonite, a hindered amine anti-aging agent and dioctyl phthalate. Wherein the bisphenol A epoxy-polyether block isocyanate terminated prepolymer is prepared by the following steps: reacting bisphenol A with epoxy chloropropane to generate epoxy resin, reacting with polytetramethylene ether glycol, and introducing isophorone diisocyanate; the methyl phenyl silicon-boron hybrid hydroxyl chain extender is prepared by carrying out hydrosilylation and ethylene glycol reaction on methyl trimethoxy silane, 3-glycidyl ether oxypropyl trimethoxy silane and allylboronic acid pinacol ester; and the methyl phenyl silicon-boron hybrid hydroxyl chain extender is prepared by carrying out hydrosilylation on methyl trimethoxy silane, 3-glycidyl ether oxypropyl trimethoxy silane and allylboronic acid pinacol ester. The material has the advantages of quick curing property, weather resistance and high-temperature stability, and is suitable for road seamless expansion joint scenes.

The invention relates to a photo-thermal aging resistant photovoltaic cable and a preparation method thereof, and belongs to the technical field of high polymer materials. The photo-thermal aging resistant photovoltaic cable is composed of a conductor wire core, and an insulating layer, a filling layer and an outer sheath which are sequentially coated on the outer side of the conductor wire core, the outer sheath is prepared from the following raw materials in parts by weight: 80-120 parts of polyvinyl chloride resin, 3-5 parts of a modified anti-aging agent, 2-8 parts of a modified flame retardant, 1-3 parts of dioctyl phthalate, 10-20 parts of nano silicon dioxide, 1-3 parts of butyl stearate and 3-5 parts of zinc stearate; the photo-thermal aging resistant photovoltaic cable prepared by the invention not only has good ultraviolet ray and thermal aging resistant effects, but also has an excellent flame retardant effect.

The invention discloses a normal-temperature bacteria liquid enteric-coated targeted colonization microcapsule and a preparation method thereof. The invention belongs to the technical field of biological medicine. The structure of the room-temperature bacterial liquid protection microcapsule is as follows: an inner layer is an activity maintaining layer and mainly consists of a sodium alginate-calcium chloride polyelectrolyte compound (the thickness is 50-100 microns); the middle layer is a pH response release layer and is mainly composed of hydroxypropyl methyl cellulose phthalate (HPMCP, dissolved at pH of 6.8 or above) and nano calcium carbonate particles (the particle size is 50nm, and the proportion is 10% w / w); the outer layer is a mucous membrane adhesion layer, and the main components of the mucous membrane adhesion layer comprise fucose modified chitosan (Fuc-CS, targeted colonic mucous membrane lectin protein) and carbomer 940 (pH sensitive adhesion polymer); the method is a microcapsule capable of preserving the bacterial liquid at normal temperature and accurately targeting colon release and adhesion colonization and a process thereof, the problem of flora activity loss caused by a freeze-drying process can be solved, in addition, the process does not need freeze-drying equipment, and the production cost is reduced.

The invention relates to the technical field of waterproof materials, and particularly discloses a self-adhesive polymer modified asphalt waterproof material as well as a preparation method and application thereof. The self-adhesive polymer modified asphalt waterproof material is prepared from the following raw materials in parts by mass: 45 to 55 parts of asphalt, 8 to 12 parts of softening oil, 10 to 15 parts of modifier, 8 to 12 parts of desulfurized rubber and 10 to 15 parts of filler, the modifier comprises the following raw materials: an ethylene-octylene copolymer, butadiene styrene rubber, coumarone resin and a functional modified material; the functional modified material is prepared from illite and phthalic acid ester. Through the design of the modifier and the proportion design of the raw material components, the synergistic interaction effect of the raw materials is fully played, the comprehensive performance of the waterproof material is improved, and the self-adhesive polymer modified asphalt waterproof coiled material prepared from the waterproof material has excellent high and low temperature properties, persistent adhesivity, peel strength, aging resistance and water resistance.

The invention relates to the technical field of alloys, and discloses a high-strength silver-copper alloy and a preparation method thereof. The acidified carbon nanotubes are subjected to functional modification, methylbenzene-2, 4-diisocyanate reacts with surface active groups of the methylbenzene-2, 4-diisocyanate to introduce-NCO groups, then through hydroxyl reaction of-NCO and 4-hydroxyphthalic acid, a plurality of carboxyl groups are grafted on the surfaces of the carbon nanotubes, the carboxyl groups can firmly adsorb lanthanum nitrate through a coordination effect, and meanwhile, the carboxyl groups can also adsorb lanthanum nitrate through a coordination effect. The rare earth elements are prevented from being separated from the raw materials in the ball milling process, uniform distribution is ensured, the agglomeration tendency of the carbon nanotubes can be reduced, and the dispersity of the carbon nanotubes in the silver-copper alloy is improved; the carbon nanotubes have extremely high axial strength and excellent conductivity, the mechanical and electrical properties of the alloy material can be enhanced through load transfer and a conductive network effect, rare earth lanthanum is segregated at a grain boundary to form a pinning effect to refine grains, the alloy strength is further improved, and finally collaborative improvement of the strength and the conductivity of the silver-copper alloy is achieved.

The invention relates to the technical field of rubber-plastic composite flame-retardant materials, and provides a graphite rubber-plastic composite flame-retardant material and a preparation method thereof.The preparation method comprises the following processes that nitrile rubber, polyvinyl chloride, dioctyl phthalate, modified expandable graphite, a stabilizer, sulfur and an anti-aging agent are added into a high-speed mixer and mixed to be uniform, and a premix is obtained; and feeding the premix into a double-screw extruder, and carrying out melt blending, extrusion and vulcanization to obtain the composite flame-retardant material. The preparation method has the beneficial effects that the modifier is combined with the expansible graphite and compounded with the nitrile rubber, the polyvinyl chloride and other base materials, so that the flame retardant property and the mechanical property of the prepared composite material are remarkably improved.

The invention discloses a low-temperature curing PVC plastisol composition for a vehicle and a preparation method of the low-temperature curing PVC plastisol composition. The invention relates to a low-temperature curing PVC plastisol composition for vehicles, which is prepared from the following raw materials in parts by weight. Comprising 5 to 15 parts of polyvinyl chloride-vinyl acetate copolymer resin, 5 to 15 parts of homopolymerized PVC paste resin, 1 to 10 parts of blended PVC paste resin, 30 to 40 parts of a compound plasticizer, 1 to 10 parts of a hydrocarbon solvent, 0.5 to 1.5 parts of terminated polyurethane, 0.5 to 2 parts of polyamide, 0.5 to 1 part of a thixotropic agent, 30 to 45 parts of an inorganic filler, 1 to 5 parts of a stabilizer and 1 to 5 parts of a moisture absorbent. The compound plasticizer is prepared from diethylene glycol dibenzoate, isodecyl benzoate and diisononyl phthalate. The PVC plastisol composition disclosed by the invention is a low-temperature and short-time curing material, and can be cured under the conditions that the baking temperature is 125 DEG C and the baking time is 20 minutes.

The invention relates to the technical field of shield tunnel construction, and discloses a shield tunnel segment joint waterproof material and a waterproof structure, the shield tunnel segment joint waterproof material comprises a component A and a component B; the component A comprises the following component: 30-40 parts of liquid polysulfide rubber; 5 to 10 parts of a fluorinated polyurethane prepolymer; 1-5 parts of a silane coupling agent; 3-5 parts of fumed silica; 8-15 parts of hollow glass beads; 10 to 15 parts of nano calcium carbonate; 0.5 to 2 parts of polytetrafluoroethylene micro powder; 0.1 to 1 part of ettringite; the component B comprises the following component: 1-5 parts of manganese dioxide; and 5 to 10 parts of dioctyl phthalate. By utilizing the characteristics that the sealing gasket has excellent fluidity during injection and can be automatically cured into a high elastomer within a set time, a pre-installed sealing gasket can be replaced by adopting an innovative injection process, and the construction difficulty faced by high-precision shield segment assembly in a high-water-pressure environment is effectively solved.

The invention discloses a method for detecting 18 phthalic acid ester substances in brewed sauce, which specifically comprises the following steps: step 1, obtaining a sample of the brewed sauce to be detected, adding a phthalic acid ester substance internal standard working solution containing deuterated isotope and water, uniformly mixing, adding sodium chloride and acetonitrile, continuously uniformly mixing, and detecting the content of the phthalic acid ester substances in the brewed sauce to be detected; carrying out ultrasonic extraction treatment for 5-15 minutes, adding an ultrasonic extracting solution into a mixture of PSA, C18 and MgSO4, and carrying out centrifugal treatment to obtain supernate; 2, carrying out nitrogen blowing on the supernate until the supernate is nearly dry, and fixing the volume by using normal hexane to obtain a sample to be detected; and step 3, detecting by adopting a gas chromatography-tandem mass spectrometer isotope internal standard method.

The invention relates to the technical field of cables, and provides a corrosion-resistant insulated power cable. The corrosion-resistant insulated power cable is sequentially provided with a conductor layer, an insulating layer and a sheath layer from inside to outside, and the insulating layer is prepared from the following raw materials in parts by weight: low-density polyethylene, magnesium hydroxide and calcium carbonate composite powder, an antioxidant, dicumyl peroxide, zinc stearate and polyethylene wax; the sheath layer comprises the following raw materials in parts by weight: PVC resin, magnesium hydroxide and calcium carbonate composite powder, diisononyl phthalate, a calcium-zinc composite stabilizer, an antioxidant, polyethylene wax and calcium stearate. According to the corrosion-resistant insulated power cable prepared in the invention, the corrosion resistance of the power cable in extreme corrosion environments such as strong acid, strong alkali, high-concentration salt mist and the like is improved, and the condition that a common cable sheath is easy to expand and crack in the extreme corrosion environments is improved.

The invention relates to rosin modified resin and a preparation process thereof and low-odor printing ink, the rosin modified resin is prepared from maleic anhydride, sulfonate alkyd resin, rosin and a metal organic framework, and the sulfonate alkyd resin is prepared from neopentyl glycol, dibutyltin dilaurate, m-phthalic acid-5-sodium sulfonate, phthalic anhydride and pentaerythritol. The printing ink has the effect of improving the strength and smell of the printing ink.

The invention discloses a liquid treatment agent for red mud harmless treatment and a preparation method thereof.The liquid treatment agent comprises a treatment agent A and a treatment agent B. The treatment agent A is formed by mixing hydrochloric acid and sulfuric acid, and the treatment agent B is prepared from malic acid, acetic acid, phthalic acid monoester, a solvent and an adsorbent, the mass fraction of the malic acid is 20%-40%, the mass fraction of the acetic acid is 20%-40%, the mass fraction of the phthalic acid monoester is 15%-25%, the mass fraction of the solvent is 5%-15%, and the mass fraction of the adsorbent is 5%-15%. The red mud is subjected to primary treatment by using the liquid treatment agent A, and then the red mud subjected to primary treatment is treated again by using the liquid treatment agent B, so that the alkalinity of the red mud can be effectively reduced, and various heavy metals, fluorides, radioactive elements and trace toxic elements in the red mud can be effectively removed; the environment pollution caused by the loss of the harmful substances is avoided, so that the innocent treatment of the red mud is realized.

The present disclosure relates to a flexible multi-layered material. An embodiment consistent with the disclosure has a plurality of poly(vinyl chloride)—PVC—layers, wherein at least one of the plurality of PVC layers is a foam layer, wherein each of the layers of the plurality of PVC layers comprises up to 60% (w / w) of a phthalate-free plasticizer, and wherein the phthalate-free plasticizer is selected from the group consisting of: phosphate, trimellitate, adipate, citrate, sebacate, polyester, vegetable oil, and mixtures thereof, and wherein the solubility of the phthalate-free plasticizer in the PVC is at least 13 (J·cm−3)1 / 2.

The invention discloses a rhodococcus ruber WM-5 strain, and the preservation number of the rhodococcus ruber WM-5 strain is CCTCC (China Center for Type Culture Collection) NO.M2025874. Research shows that the rhodococcus ruber WM-5 strain has the functions of resisting cadmium and degrading phthalic acid ester, has extremely high degradation efficiency on DBP (dibutyl phthalate), and is relatively wide in suitable degradation condition range; the Rhodococcus ruber WM-5 strain has strong tolerance to Cd < 2 + > and PAEs, when the Rhodococcus ruber WM-5 strain is applied to PAEs polluted solution systems under the condition of different initial concentrations of PAEs and Cd-PAEs composite polluted solution systems with different initial concentrations of Cd < 2 + >, high PAEs degradation efficiency can be maintained, and technical support is provided for remediation of Cd-PAEs composite pollution. In a word, the invention makes up the technical blank of Cd-resistant PAEs degrading strains, and the Rhodococcus ruber WM-5 strain or the microbial agent thereof has great application value in the aspects of degrading phthalate and repairing Cd-PAEs composite pollutants.

The invention discloses polyolefin artificial leather, a preparation method thereof and an automobile seat, and belongs to the technical field of polyolefin artificial leather. The polyolefin artificial leather comprises a base cloth layer, a high-elasticity and high-softness layer and a coating layer which are sequentially stacked, the high-elasticity and high-softness layer comprises the following raw material components: a polyolefin elastomer, a low-density polyolefin elastomer, modified high-elasticity resin, an assistant crosslinker, a coupling agent and an anti-aging agent; the low-density polyolefin elastomer comprises a modified polyolefin elastomer, inorganic microspheres and a silane coupling agent; the modified polyolefin elastomer is prepared by grafting 4-vinyl-1, 2-phthalic acid and maleic anhydride on a polyolefin elastomer by adopting a melt grafting method; the modified high-elasticity resin comprises a high-elasticity polyolefin elastomer, a rubber elastomer, a silane coupling agent and a peroxide cross-linking agent; the high-elasticity polyolefin elastomer is obtained by copolymerization of propylene, norbornene and cardanol; p-chlorophenyl trimethoxy silane is at least adopted as the coupling agent.

The invention discloses an anti-aging light-conversion silver black mulching film and a preparation method thereof, and belongs to the technical field of agricultural polymer films. The preparation method comprises the following steps: S1, mixing low-density polyethylene powder, aluminum paste, a complex light conversion agent, dioctyl phthalate and EVA (Ethylene Vinyl Acetate) to prepare silver light conversion master batches; s2, vinyl-terminated fluorosilicone oil, tert-butyl peroxybenzoate and linear low-density polyethylene powder are stirred for a reaction, and modified low-density polyethylene is obtained; the modified low-density polyethylene, maleic anhydride grafted polyethylene, a multi-effect light stabilizer and polyethylene wax are subjected to banburying granulation, and modified light-stable master batches are obtained; s3, carrying out banburying granulation on the low-density polyethylene powder, the polyethylene powder, carbon black, zinc stearate, ethylene bis-stearamide and the EVA powder to obtain black master batches; s4, blending the silver layer and the black layer, and performing double-layer co-extrusion to obtain the light-conversion silver-black mulching film. The light-conversion silver black mulching film provided by the invention has good mechanical properties and aging resistance.

The invention provides a drilling fluid flow pattern regulator suitable for Antarctic subglacial drilling and a preparation method and application thereof, and belongs to the technical field of polar region drilling. The flow pattern regulator is prepared from the following raw materials: 4-tert-butyl styrene, carboxylic acid, an acrylate monomer, oleyl alcohol, concentrated sulfuric acid and an initiator. The carboxylic acid is one of ricinoleic acid or phthalic acid; the acrylic ester monomer is one of acrylic acid-2-hydroxyethyl ester or 2-acrylic acid-2-hydroxy-3-phenoxy propyl ester, and the acrylic ester monomer is one of acrylic acid-2-hydroxyethyl ester and 2-acrylic acid-2-hydroxy-3-phenoxy propyl ester; and the initiator is one of azodiisobutyronitrile or benzoyl peroxide. The flow pattern regulator is simple in raw material composition and preparation method and low in cost. The flow pattern regulator can effectively improve the ultralow-temperature rheological property of the drilling fluid, enables the drilling fluid to have the advantages of low viscosity, high dynamic shearing force, chip carrying (ice chips and rock chips), excellent suspension performance and the like at the ultralow temperature, and is suitable for under-ice drilling in the Antarctic pole.

The application discloses a method for inhibiting the migration of toxic small molecules in plastics based on a protein-based phase transition composite coating, which is characterized by the following steps: inducing the rapid phase transition of proteins on the surface of plastics by a disulfide bond reducing agent to form a nanofilm, and adsorbing polysaccharides on the surface of the nanofilm to form a protein-based phase transition composite coating on the surface of the plastics, which can inhibit the migration of toxic small molecules in the plastics. The preparation method of the protein-based phase transition composite coating is simple, the cost is low, the inhibition effect on the migration of phthalate plasticizers and bisphenol A in plastics (such as PVC, PP, PE, PS and PET) is good, the adsorption of drugs on the surface of medical plastics can be prevented at the same time, the protein-based phase transition composite coating has good biocompatibility, is suitable for temperature-sensitive plastics, has universality, can be safely used on the surface of food and medical plastic products, and has a good popularization and application prospect on the surface of plastics.

The invention provides polyurethane wet resin for soft embossing-resistant clothing leather as well as a preparation method and application of the polyurethane wet resin. The preparation raw materials of the polyurethane wet resin comprise the following components in parts by weight: 0.002-0.004 part of inorganic acid; 165 to 251 parts of polyester polyol; 42 to 64 parts of isocyanate; 7-11 parts of small molecular alcohol; 24 to 37 parts of an auxiliary agent; 560 to 840 parts of a solvent; the polyester polyol simultaneously comprises polyester polyol of an adipic acid-ethylene glycol-1, 4-butanediol system, polyester polyol of an adipic acid-phthalic acid-ethylene glycol-1, 4-butanediol system, polyester polyol of an adipic acid-phthalic acid-ethylene glycol-1, 4- The polyester polyol is prepared from polyester polyol of a 1, 4-butanediol system, polyester polyol of an adipic acid-diethylene glycol-ethylene glycol system, polyester polyol of an adipic acid-diethylene glycol system and polyester polyol of an adipic acid-ethylene glycol system. The polyurethane wet resin disclosed by the invention has the characteristics of good finger-pressing resilience, thick and soft hand feeling, good black color developing property and the like, and the prepared synthetic leather keeps good high-temperature embossing resilience and combines the thick and soft hand feeling, so that the additional value of the product is obviously improved.

The invention discloses an antibacterial coating which comprises a component A and a component B. The component A comprises the following raw materials in parts by weight: 40-60 parts of epoxy resin, 15-35 parts of polyamide resin, 5-10 parts of tea tree essential oil, 1-3 parts of di (2-ethylhexyl) phthalate, 1-2 parts of fumed silica, 1-2 parts of acrylate, 1-2 parts of sodium phosphate and 1-2 parts of polyvinyl ether. The component B comprises the following raw materials in parts by weight: 20-30 parts of modified nano zinc oxide, 40-60 parts of an antibacterial curing agent, 15-20 parts of butanol and 2-10 parts of acetone. The weight ratio of the component A to the component B is 8: (2-4), and the water-resistant coating is excellent in mechanical property, high in adhesive force and good in water resistance.

The invention discloses a paired electrochemical synthesis method of anisaldehyde and phthalide, which comprises the following steps of: adopting p-methyl anisole and phthalate as raw materials, oxidizing p-methyl anisole at an anode to generate anisaldehyde through electrolytic reaction in the same electrolytic bath, and reducing phthalate at a cathode to generate phthalide, an electrolyte system adopted in the electrolytic reaction comprises an electrolyte, water, N, N-dimethylformamide and methanol. In the same electrochemical synthesis system, p-methyl anisole and phthalate are used as raw materials, the mixed solvent which is low in price and easy to obtain is used, anisaldehyde is generated on an anode and phthalide is generated on a cathode through an electrolytic reaction, high-added-value products exist in the anode and the cathode, an oxidizing agent and a noble metal catalyst are not needed, and the method is simple and convenient to operate. Basically no three wastes are generated, and no hydrogen and oxygen are generated in the reaction process, so that the method is safer.

The invention relates to high-molecular-weight polydiethylene glycol phthalate, a preparation method thereof and low-warping hydrolysis-resistant glass fiber reinforced PBT (polybutylene terephthalate) in the field of resin. The high-molecular-weight polydiethylene glycol phthalate has a structure as shown in a formula (I), and the low-warping hydrolysis-resistant glass fiber reinforced PBT is prepared from the following components: PBT, high-molecular-weight polydiethylene glycol phthalate, an inorganic filler and glass fibers. By adding the high-molecular-weight polydiethylene glycol phthalate, the tensile strength and bending strength of a PBT and high-molecular-weight polydiethylene glycol phthalate blending system can be improved, the notch impact strength of the system can be improved to a certain extent, the molding shrinkage rate of the blending system is reduced, and the PBT / high-molecular-weight polydiethylene glycol phthalate blending system has hydrolysis resistance and can be used for preparing the PBT / high-molecular-weight polydiethylene glycol phthalate composite material. And the effect is obvious.

The invention discloses mongolian mongolian yeast and an application thereof. Relates to the technical field of fermentation. The invention provides a specific strain and application thereof in tobacco leaves. According to the tobacco leaf extracting solution fermented by the bacterial strain, the content of esters such as 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, tributyl phosphate, dihydroactinidiolide, dibutyl phthalate, 3-(3, 5-di-tert-butyl-4-hydroxyphenyl) methyl propionate and methyl palmitate is remarkably increased, and the content of the esters such as 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, tributyl phosphate, dihydroactinidiolide, dibutyl phthalate, 3-(3, 5-di-tert-butyl-4-hydroxyphenyl) methyl propionate and methyl palmitate is remarkably increased; three novel ester substances with fruit fragrance, rosin and other characteristic fragrances are newly generated, and the overall fragrance style is remarkably enhanced. It is shown that the aroma-producing caribeckia mongolica yeast MC-5 fermented tobacco leaf extracting solution has good aroma-producing capacity, and through the combined effect of enzymolysis and fermentation, the aroma-producing caribeckia mongolica yeast MC-5 fermented tobacco leaf extracting solution is expected to play an important application value in the field of quality improvement and aroma enhancement of tobacco leaf raw materials.

The invention relates to the technical field of fish meat source identification, in particular to a method for identifying different sources of fish meat by combining an electronic tongue with HS-SPME-GC / MS. The method comprises the following steps: obtaining a fish meat sample; performing taste detection on the fish meat sample by adopting an electronic tongue to obtain a taste detection result; after the fish meat sample is extracted, volatile odor substance detection is conducted through chromatography and mass spectrometry, volatile odor substances comprise one or more of dimethyl phthalate, nonanal, n-hexyl alcohol, naphthalene, octanol, 1-octylene-3-alcohol and alpha-platylene, and a volatile odor substance detection result is obtained; and identifying the fish meat source in combination with the taste detection result and the volatile odor substance detection result. According to the method, an electronic tongue technology and a headspace solid phase microextraction-gas chromatography-mass spectrometry technology are combined for use, and the taste and the smell are detected at the same time so as to distinguish fish meat from different sources, so that a more reliable quality evaluation system can be established, accurate traceability and grading are supported, and different user requirements are met.

An electromagnetic shielding and heat-conducting multi-layer material and a preparation method thereof. The multi-layer material includes an electric field shielding layer, an epoxy heat-conducting adhesive layer, and a magnetic field shielding layer. The electric field shielding layer includes a copper foil layer with a thickness of 5-12 μm. The magnetic field shielding layer has a thickness of 1-3 mm and includes a resin matrix A and carbon fiber cloth. By weight, the resin matrix A includes: 100 parts of bismaleimide resin, 60-68 parts of 3,3-diallylbisphenol A, 32-40 parts of triallyl isocyanurate, 18-20 parts of N,N-dimethylformamide, 100-160 parts of magnetic field shielding filler, 8-10 parts of di-sec-octyl phthalate, and 0.3-0.8 parts of cobalt naphthenate. The magnetic field shielding filler is compounded by nano-manganese zinc ferrite and micron nickel powder in a mass ratio of (80-120):(30-40). The electromagnetic shielding and heat-conducting multi-layer material of the present invention has both electric field and magnetic field shielding functions and is particularly suitable for high magnetic field and high electric field application environments.

The invention discloses a molecularly imprinted adsorption material taking a metal organic framework as a carrier skeleton as well as a preparation method and application of the molecularly imprinted adsorption material, and belongs to the technical field of adsorption materials. The preparation method comprises the following steps: carrying out hydrothermal reaction on transition metal salt and a phthalic acid ligand to obtain metal organic framework nanoparticles; the preparation method comprises the following steps: adsorbing flavonoid template molecules by metal organic framework nanoparticles, mixing with lysozyme and a disulfide bond reducing agent, performing phase change polymerization, and eluting to remove the flavonoid template molecules after the phase change polymerization is completed, thereby obtaining the molecularly imprinted adsorbing material with abundant imprinting sites and good stability. The adsorbent is good in flavonoid compound adsorption selectivity, high in rate, large in capacity, good in chemical stability, resistant to acid washing, capable of being recycled for multiple times and capable of being widely applied to extraction and separation of flavonoid compounds.

The present invention discloses Gordonia for degrading various phthalic acid esters and its application in repairing phthalic acid ester-polluted soil. A strain of Gordonia FV1 was isolated from contaminated soil, and its microbial preservation number is: CGMCC No. 30310. This strain still has excellent degradation ability for phthalic acid esters within the temperature range of 10-60 °C or within the pH value range of 5.0-11.0, and has strong environmental adaptability. The Gordonia FV1 can degrade 14 phthalic acid esters, covering short-chain PAEs, medium-chain PAEs, long-chain PAEs, and complex-chain PAEs. Applying the Gordonia FV1 to bioremediate soil can effectively remove bis(2-ethylhexyl) phthalate in the soil. The present invention has application prospects in aspects such as microbial degradation of phthalic acid esters and bioremediation of soil.

The invention relates to a controllable electrochemical etching strategy based on solubility product difference, in particular to a preparation method of a barium sulfate modified NiCo-LDH aqueous alkaline zinc battery positive electrode material, which comprises the following steps: firstly, dissolving 1, 4-phthalic acid and sodium hydroxide in a molar ratio of 1: 2 in water to obtain a solution A; dissolving barium nitrate pentahydrate, cobalt nitrate hexahydrate, nickel nitrate hexahydrate and ammonium fluoride in water according to a molar ratio of (0-1.5): 1: 4: 10 to obtain a solution B; the preparation method comprises the following steps: fully mixing the solutions, transferring the mixed solution into an autoclave containing foamed nickel (NF), and carrying out solvothermal reaction to obtain a tri-metal Co / Ni / Ba-MOF precursor (CNBx-BDC); cNBx-BDC is used as a working electrode, a platinum wire is used as a counter electrode, Hg / HgO is used as a reference electrode, 5-6M potassium hydroxide and 0.05-0.06 M sodium sulfate are used as electrolyte, a three-electrode system and a cyclic voltammetry method are adopted, electrochemical etching is carried out at the scanning rate of 20-30mV s <-1 > under the voltage range of 0-0.5 V, and the barium sulfate nanodot functionalized Co / Ni / Ba-LDH electrode (BS (at) CN-LDH) is obtained after six times of circulation. The unique porous structure can provide more electrochemical active sites and enhance electrolyte infiltration capacity, and the constructed heterostructure forms a strong built-in electric field, accelerates charge transfer, reduces ion diffusion energy barriers and improves energy utilization efficiency.