41results about How to "Increase polarity" patented technology

The invention relates to a uniform carbon-coated mesoporous silicon carbon negative electrode material and a preparation method and application thereof.The preparation method comprises the steps that a product obtained after pyrolysis and carbonization of a biomass carbon source is subjected to alkali activation treatment, acid pickling, drying, smashing, passivation, water washing and drying are conducted to obtain a mesoporous carbon matrix, nanometer silicon particles are deposited in pores of the mesoporous carbon matrix, and the uniform carbon-coated mesoporous silicon carbon negative electrode material is obtained. Then selecting a low-temperature carbonization material and polyethylene glycol to perform pre-carbonization and complete carbonization treatment on the mesoporous silicon carbon material to obtain a carbon coating layer, and finally obtaining the uniform carbon-coated mesoporous silicon carbon negative electrode material. When the uniform carbon-coated mesoporous silicon carbon negative electrode material is applied to a lithium battery, the mesoporous skeleton can effectively inhibit volume expansion of silicon in a battery circulation process, and the uniform carbon-coated layer can effectively reduce the risk of direct contact between the negative electrode material and an electrolyte, so that a stable SE I film is formed to reduce the occurrence of side reactions; and the first coulombic efficiency and the cycle performance of the battery are further improved.

The application discloses a modified asphalt for water-based drilling fluid and a preparation method thereof. The modified asphalt for water-based drilling fluid comprises the following raw material components: pretreated reducing slag, acid anhydride modifier, initiator, stabilizer, modifier, modification aid and performance regulator. The modifier is low-grade sulfur. The pretreated reducing slag comprises the following raw material components in weight: inferior reducing slag: 100 parts; oil sand asphalt: 20-60 parts; and pretreatment agent: 0.1-2 parts. The high-softening-point asphalt with high softening point and good hydrophilicity is obtained by modifying the difficult-to-handle inferior reducing slag and oil sand asphalt, and is suitable for being used as main material for producing asphalt water-based drilling fluid.

This invention relates to the field of microbial technology, disclosing a *Strombus adhesiveus* strain YF2 that degrades polyethylene mulch film, microbial preparations, methods, and applications, addressing the problems of insufficient efficacy and unclear mechanisms in existing PE-degrading strains. This strain is deposited at the Guangdong Provincial Microbial Culture Collection Center, with accession number GDMCC No:67086, and a deposit date of October 13, 2025. Through systematic parallel comparisons, strain YF2 significantly outperformed the control strain in PE degradation efficiency, biofilm formation ability, and induction of PE polymer oxidation. Genomic analysis showed that YF2 contains a genetic network encoding key degrading enzyme systems such as nitroreductase, cytochrome P450, and alkane monooxygenase, and particularly possesses unique nitrification degradation potential. Microbial preparations prepared based on this strain can be used for the bioremediation of PE mulch film residues in farmland soils, compost, and other environments.

The invention discloses a method for preparing a carbon-silicon-aluminum composite adsorbent from coal gasification slag and application of the carbon-silicon-aluminum composite adsorbent, and belongs to the technical field of solid waste resource utilization. The method comprises the following steps: carrying out charcoal-ash separation on the coal gasification fine slag, and crushing to obtain a charcoal source; the method comprises the following steps: sequentially carrying out crushing, dissolution, solid-liquid separation and dissolution liquid precipitation on the coal gasification coarse slag to obtain a silicon-aluminum precursor, and putting the silicon-aluminum precursor into an acid solution for solation treatment; and mixing the obtained carbon source, the solated silicon-aluminum precursor, a bonding auxiliary agent and a lubricating auxiliary agent, molding, drying and activating to obtain the silicon-aluminum composite material. The carbon source is extracted from the fine coal gasification slag, silicon and aluminum elements are extracted from the coarse coal gasification slag, and the carbon-silicon-aluminum composite adsorbent is prepared after mixing, forming and activating and used for efficiently capturing VOCs, and meanwhile high-value utilization of the gasification slag can be achieved.

The invention relates to the technical field of pipeline anticorrosion materials, and discloses a preparation method of a polypropylene adhesive for pipeline anticorrosion, which comprises the following steps: (a) providing polypropylene matrix resin, anhydride grafted polypropylene and the like; (b) putting the polypropylene matrix resin, the anhydride grafted polypropylene, the tackifying resin, the elastomer, the antioxidant and the plasticizer into mixing equipment, and mixing at a low speed from room temperature to 60 DEG C to obtain a premix; and (c) adding the premix, the filler, the curing agent and the diluent into a double-screw extruder together, and carrying out melt blending, extrusion, cooling and granulation to obtain the polypropylene adhesive for pipeline corrosion prevention. Compared with the prior art, the preparation method of the polypropylene adhesive for pipeline corrosion prevention, provided by the invention, has the advantages that through an optimized raw material formula and a specific process flow, the prepared adhesive has excellent bonding strength, flexibility and aging resistance, is suitable for being prepared into a powder form, and has a good application prospect. And storage, transportation and coating in the pipeline anti-corrosion construction are facilitated.

This invention provides an absorbent for capturing carbon dioxide and a method for capturing carbon dioxide. By volume percentage, the absorbent comprises 20-60% glycine salt aqueous solution, 10-50% triethylene glycol monomethyl ether, 5-10% ethylene glycol, and the balance being water. This absorbent combines the advantages of glycine salt systems, such as low volatility, non-toxicity, safety, and better antioxidant degradation resistance, while avoiding the risk of solid precipitates forming after absorption by the glycine salt system, which could cause pipeline blockage.

The invention discloses an acrylate pressure-sensitive adhesive capable of being tackified through UV irradiation and a preparation method and application of the acrylate pressure-sensitive adhesive, and belongs to the technical field of pressure-sensitive adhesives. The pressure-sensitive adhesive is composed of functional monomer o-nitrobenzyl (meth) acrylate, (meth) acrylate monomer and other components according to a specific mass ratio. The preparation method comprises the following steps: dropwise adding a mixture of an initiator and a solvent step by step, and carrying out temperature-controlled dark reaction. The core advantages are that the bonding force is switched according to needs: the initial stripping force is low, so that the alignment adjustment during the bonding of precise electronic components is facilitated, and the damage to a base material is avoided; after UV irradiation, the functional monomer is subjected to photolysis to generate polar groups, the stripping force is increased to 100 times or more of the initial value, strong bonding is achieved, and the pressure-sensitive adhesive is easy and convenient to operate, stable in performance, suitable for manufacturing of electronic components such as semiconductors and display modules and capable of meeting the stable bonding requirements of subsequent procedures such as grinding and cutting.

The present application provides a kind of UV reinforced polyvinyl butyral modified asphalt and its preparation method.The modified asphalt is based on matrix asphalt, polyvinyl butyral, photoinitiator and crosslinking aid are added, and the uniform dispersion and crosslinking reaction of polyvinyl butyral in asphalt system are promoted by UV light, so as to improve the ultraviolet aging resistance, bonding strength and weather resistance of asphalt.The preparation steps include: heating the matrix asphalt to 140-190℃, adding polyvinyl butyral shear stirring, then adding photoinitiator and crosslinking aid, and continuing to stir under UV light to form a uniform modified asphalt system.The method can significantly improve the aging resistance, high temperature stability and low temperature crack resistance of modified asphalt, and is suitable for road paving, bridge waterproofing and other high durability engineering fields, and has good industrial application prospect.

The invention provides a preparation method of a composite fireproof door plate capable of resisting water spray impact, which comprises the following steps: placing wood particles in a vacuum environment to discharge pore air, injecting a modified mineralization liquid to carry out pressure impregnation, adjusting the pH value or introducing carbon dioxide, and drying to obtain ceramic modified wood particles; taking chemical vitrified perlite particles as aggregate, adding inorganic reinforced fibers and an inorganic adhesive, and mixing to prepare a fiber toughened core body mixture; and mixing the ceramic modified wood particles with an inorganic adhesive to serve as a shell material, taking the fiber toughened core body mixture as a core body material, and carrying out material distribution, pressure application, compounding, curing and demolding in a mold to obtain the composite fireproof door plate capable of resisting water spray impact. The composite fireproof door plate prepared by the invention can keep high bonding strength at normal temperature, and can still keep enough mechanical strength to resist water flow impact after high-temperature combustion.

The application relates to the technical field of plant beverage processing, and discloses a compound star anise liquor and fructooligosaccharide beverage and a preparation process thereof, which is prepared from 11.8wt%-19.6wt% of star anise liquor extract, 8wt%-15wt% of fructooligosaccharide, 0.1wt%-0.3wt% of anhydrous citric acid, potassium sorbate, sodium ascorbate and purified water; the process comprises the following steps: preparing high-concentration fructooligosaccharide syrup by using part of the purified water, adding the extract and sodium ascorbate into the fructooligosaccharide syrup to obtain a high-viscosity complex mother liquor, sterilizing and rapidly cooling the mother liquor under near-neutral conditions, preparing a deep quenching liquid by mixing the remaining purified water, anhydrous citric acid and potassium sorbate, and synchronously colliding and mixing the cooled mother liquor and the deep quenching liquid to carry out sterile filling. The application improves the dispersion state of the hydrophobic components by using a local high-concentration polysaccharide environment, decouples the heating sterilization process and the acid adjusting process, effectively inhibits polysaccharide hydrolysis and essential oil coalescence, and improves the physical and chemical stability of the finished product.

The application discloses a kind of polypropylene coating and preparation method thereof, belong to polypropylene coating technical field, first by photo-induced mercapto-alkene reaction preparation amino tung oil acid, again by template method copolycondensation synthesis mesoporous organosilica amino tung oil acid, simultaneously polypropylene and trifluoroethyl methacrylate melt grafting obtains TFEMA grafted modified polypropylene, finally with xylene as solvent, bismaleimide is used as crosslinking agent, and each component is blended to obtain polypropylene coating;The application is endowed with low surface energy and weathering stability by introducing fluorine-containing group to coating, combined with the ultraviolet shielding function of mesoporous organosilica, supplemented by BMI dynamic reversible crosslinking to build strong adhesion and self-repairing network, synergistically solve the technical problems that traditional polypropylene coating is poor in ultraviolet stability, weak in adhesion, and easy to age, significantly improve the outdoor durability, self-repairing and corrosion resistance of coating, and be applicable to outdoor building materials, automobile shell and other high-end protection fields with strict durability requirements.

This invention discloses a soybean phospholipid-based nanoemulsion and its preparation method, belonging to the fields of molecular biology and biomedicine. This invention addresses the technical problem of refining the particle size and improving the stability of existing soybean phospholipid-based nanoemulsions for use in fine pharmaceuticals. A method for preparing a soybean phospholipid-based nanoemulsion includes the following steps: S1, modified glycerol phosphorylcholine and cholesterol are mixed in ethanol, then phosphatidylethanolamine and a composite stabilizer are added to form an oil phase; deionized water, glycerol, and polyether F68 are mixed to form an aqueous phase; S2, the oil phase is injected into the aqueous phase and homogenized at high speed to obtain a preliminary mixture; the pH of the preliminary mixture is adjusted to prepare a primary emulsion; the primary emulsion undergoes low-pressure homogenization followed by high-pressure homogenization to obtain a nanoemulsion; the nanoemulsion is filtered through a microporous membrane to obtain the soybean phospholipid-based nanoemulsion. The nanoemulsion prepared by this invention has the advantages of small particle size and good photothermal stability.

This application belongs to the field of organic materials technology, and provides an organic compound with the structure shown in Formula 1. This application also provides an organic electroluminescent device and electronic device comprising this organic compound. As an organic electroluminescent layer material, this organic compound can effectively improve the luminous efficiency of the organic electroluminescent device and extend its service life.

The invention relates to the field of preparation of high polymer materials, in particular to a flexible irradiation crosslinking polyethylene foam material with high tensile strength and a preparation method thereof. According to the method, an elastic grafted polyion brush functional component is compounded with low-density polyethylene, so that the flexibility and tensile strength of the polyethylene foam can be effectively improved, and the polyethylene foam material with flexibility, high tensile strength and no corona gluing is obtained. The method disclosed by the invention has the following advantages: (1) the product is good in flexibility and high in tensile strength, and when the apparent density is lower than 0.1 g / cm < 3 > and the thickness is 1mm, the elastic modulus is below 0.8 MPa, the tensile strength is more than 1.6 MPa, and the elongation is more than 250%; (2) the cohesiveness of the product is high, the surface tension can reach 39 mN / m or above, the requirement of a gluing process is met, and the surface tension can be maintained for 6 months or above; and (3) the obtained product has wide application in the fields of precision mechanical shock absorption, electronic equipment, electronic screen protection and the like.

This invention discloses an industrial-scale chemical preparation method for 1,2-di fatty acid glycerides, comprising the following steps: (A) acetone glycerol is protected with a silyl ether protecting agent and purified by crystallization to obtain intermediate 1; (B) intermediate 1 undergoes a depropionyl protecting group reaction and crystallization to obtain intermediate 2; (C) intermediate 2 undergoes an esterification reaction and crystallization and adsorption to obtain intermediate 3; (D) intermediate 3 undergoes a desilyl ether protection reaction and recrystallization to obtain 1,2-di fatty acid glycerides. This invention, through crystallization purification under different conditions, avoids the disadvantages of traditional chemical methods for preparing 1,2-di fatty acid glycerides, such as the need for multiple column chromatography purification steps, low yield, and difficulty in industrialization. This method features mild operating conditions, high purity, and is easily scalable for large-scale industrialization.

A coal tar pitch-coated transition metal nitrogen-doped carbon nanotube composite electrode material, its preparation method, and its application are disclosed, belonging to the technical field of capacitor deionization electrode materials. The method includes: firstly, nitrogen-doping modification of carbon nanotubes to obtain nitrogen-doped carbon nanotubes; then, introducing a transition metal salt precursor and undergoing a first-stage heat treatment to obtain a transition metal-loaded nitrogen-doped carbon nanotube precursor composite material; subsequently, adding coal tar pitch and undergoing a second-stage heat treatment to obtain the coal tar pitch-coated transition metal nitrogen-doped carbon nanotube composite electrode material. In the obtained material, the nitrogen-doped carbon nanotubes provide a continuous conductive network and mass transfer channels, the transition metal component improves interfacial charge transport performance, and the coal tar pitch-derived carbon layer enhances structural stability and interfacial coupling ability, thereby improving the electroadsorption efficiency, rate performance, and cycle stability during capacitor deionization.

The application provides an amino-modified micro-nanoparticle modified asphalt and a preparation method thereof. The asphalt is prepared from amino-modified micro-nanoparticles and acid anhydride modified asphalt, wherein the weight ratio of the amino-modified micro-nanoparticles to the acid anhydride modified asphalt is 0.005-0.05:1. The preparation method of the modified asphalt is as follows: a proper amount of amino-modified micro-nanoparticles is added into molten acid anhydride modified asphalt, the temperature is maintained at 100-200 DEG C, and the stirring is continuously carried out at a speed of 1000-2000 rpm for 0.5-5 h to obtain the modified asphalt with uniformly dispersed micro-nanoparticles. The modified asphalt prepared by the application has significantly improved high-temperature performance, enhanced anti-rutting capacity and improved anti-aging performance compared with the base asphalt, and has great application potential in highways in high-temperature regions.

This invention relates to a method for preparing a flotation collector, a flotation collector, and a flotation method for oxidized minerals, belonging to the field of mineral processing technology. It solves the problems of low flotation recovery rates, high temperature dependence, high energy consumption, and environmental pollution associated with existing collectors for oxidized minerals. The flotation collector prepared by the method described above has high polarity, significantly enhancing the adsorption between it and functional groups on the mineral surface, thus improving the mineral flotation recovery rate. Under low-temperature conditions, it exhibits good water solubility and dispersibility, contributing to improved mineral recovery rates at low temperatures. Combined with the appropriate carbon chain length of the collector molecule, flotation can be achieved over a wide flotation temperature range, reducing the impact of temperature on mineral flotation and achieving energy saving and carbon reduction in the flotation method. Furthermore, the collector molecule contains two carboxyl groups, readily chelating with metal cations to achieve selective collection of metal ions, making it suitable for flotation under various water quality conditions.

The present application relates to the technical field of cosmetic raw materials, and discloses a camellia flower composite oil, a preparation method and application thereof, and a cosmetic. The preparation method of the camellia flower composite oil comprises the following steps: (1) performing enzymatic reaction on camellia oil in the presence of lipase and a solvent, and separating to obtain enzymatic camellia oil; (2) performing extraction on camellia flower powder and the enzymatic camellia oil to obtain an extraction mixture; and (3) performing solid-liquid separation on the extraction mixture to obtain the camellia flower composite oil. The camellia flower composite oil provided by the present application has high polarity, high antioxidant property, high safety and good formulation application performance, and can significantly improve the water phase carrying capacity and long-term stability of a water-in-oil emulsion.

This invention belongs to the field of functional material preparation, and particularly relates to a flake-like MoO2. 2 / Mo 2 C@poplar catkin biomass carbon composite material and its application: scaly MoO2 was prepared by a method of poplar catkin carbonization-impregnation with molybdate-calcination in an inert atmosphere. 2 / Mo 2 C@poplar catkin biomass carbon composite material, and further calcined the material in air to prepare hollow tubular MoO 3 The materials and synthesis methods are simple and easy to implement. The materials obtained in this invention exhibit excellent performance as anode materials for lithium-ion batteries and cathode carrier materials for lithium-sulfur batteries, which is beneficial for the preparation of high-energy-density electrode materials. Moreover, the preparation method is inexpensive and can simultaneously solve the harm caused by poplar catkins, realizing the high-value utilization of poplar catkins.

The application belongs to the technical field of desulfurizer, and discloses a natural gas desulfurizer, a preparation method and application thereof, the natural gas desulfurizer comprises 2-(2-morpholine-4-ethoxy)-ethanol and N-methyl diethanolamine with a molar ratio of (1-3):(2-4). The removal rate of H2S reaches more than 98%, and the removal rate of organic sulfur reaches 70%-75%. The application expands the application range of N-methyl diethanolamine as a main agent, and can be used for refining and removing hydrogen sulfide and organic sulfur in the acidic gas in the natural gas, coal chemical industry and petroleum chemical industry process. The preparation process of the composite desulfurizer is simple, the cost is low, the environmental pollution is small, and the application effect is outstanding.

This invention discloses a green and efficient pretreatment method for biomass and its application in the selective preparation of 2,3-dihydrobenzofuran. The pretreatment includes: uniformly mixing biomass raw materials with a ternary eutectic solvent, reacting the mixture in a microwave synthesizer, and then washing, filtering, and drying the reactants to collect the solid residue, thus obtaining the pretreated biomass. The ternary eutectic solvent used in this invention is a mixed solution of zinc chloride, ethylene glycol, and water. It is simple to prepare, uses readily available and harmless raw materials, and is recyclable. Zinc has the dual functions of solvent and catalyst, increasing the total number of hydrogen bonds, promoting the breaking of β-O-4 bonds, and increasing the acidity of the solvent. It also forms metal ion complexes with water ligands, promoting biomass pyrolysis. The pretreatment method of this invention can achieve a lignin removal rate of over 80% at low temperatures, requires a short reaction time, uses readily available and harmless solvents, and exhibits a selectivity for 2,3-dihydrobenzofuran exceeding 40% after pyrolysis, providing technical support for advancing industrialization.

The application provides a resource utilization method of hematite type waste residue, which comprises the following steps: firstly, mixing the hematite type waste residue with hydrochloric acid to carry out leaching reaction; secondly, mixing the leaching solution with a composite extraction phase comprising TBP, N235 and / or N263 to carry out extraction treatment; thirdly, mixing the obtained iron-containing loaded organic phase with water to carry out stripping treatment; and finally, evaporating and concentrating the stripping solution, and then cooling and crystallizing to obtain a ferric chloride product. The resource utilization method of the application does not need high-temperature roasting, has a short process, high recovery rate and high product purity, and can extract iron in the waste residue to prepare the ferric chloride crystal product, which can be used as a basic chemical raw material in the chemical, metallurgical and water treatment industries, and can realize better low-energy-consumption and resource utilization of the hematite type waste residue.

The invention discloses an anti-static wafer PVCWafer protective film and a preparation method thereof, and belongs to the technical field of PVC thin films, hydroxyl on a polyborosiloxane molecular chain and silicon hydroxyl on the surface of modified nickel composite hollow carbon fiber are condensed, polyborosiloxane / hollow carbon fiber is used as rigid filler and can be uniformly dispersed in a polyvinyl chloride matrix, and the reason is that the rigid filler can be uniformly dispersed in the polyvinyl chloride matrix, so that the anti-static wafer PVCWafer protective film is prepared. Polyborosiloxane molecules contain a large number of silicon-oxygen bonds and boron-oxygen bonds, the groups have high polarity, compatibility with polyvinyl chloride can be improved, organosiloxane chain segments of polyborosiloxane have certain flexibility, the organosiloxane chain segments can serve as flexible buffer layers, rigidity difference between polyborosiloxane / hollow carbon fibers and polyvinyl chloride is relieved, and therefore the service life of the hollow carbon fibers is prolonged. The interface stress concentration is reduced, and the compatibility of the two is further improved.

The application discloses a fluorine-containing anion detection method in lithium batteries based on liquid chromatography mass spectrometry analysis, relates to the technical field of analytical chemistry, and mainly aims to solve the problems that the existing ion chromatography method has low sensitivity and poor selectivity, cannot meet the analysis requirements of complex matrix samples, is difficult to overcome matrix interference, influences the accuracy and reliability of identification results, and cannot comprehensively cover various inorganic and organic fluorine-containing anions in lithium batteries. The method comprises the following steps: performing pretreatment operation on a to-be-detected sample based on different sample types; performing solid-phase extraction operation on the to-be-detected sample after the pretreatment operation, and detecting fluorine-containing anions of the target detection object by means of a liquid chromatography mass spectrometry device to obtain a fluorine-containing anion chromatogram; and accurately quantifying the fluorine-containing anions in the sample by means of an analyte standard curve.

The application relates to a total station packaging box antistatic hard material and a preparation method thereof, and belongs to the technical field of high polymer materials; the total station packaging box antistatic hard material is prepared by taking ABS resin, an antioxidant, a lubricant, an initiator and a self-prepared permanent antistatic agent as raw materials; the permanent antistatic agent prepared by the application can not only provide good antistatic performance, but also good flame retardance; the permanent antistatic agent of the application has good compatibility with the ABS resin; the permanent antistatic agent of the application will not cause the mechanical performance of the ABS resin group to decrease; and finally, the total station packaging box antistatic hard material prepared has good flame retardance, antistatic performance and impact toughness.

This invention discloses an organofluorosilicone emulsion deepening agent, which is made from the following raw materials in parts by weight: 3-9 parts of hexamethylcyclotrisiloxane, 2-4 parts of trifluoropropylmethylcyclotrisiloxane, 1-3 parts of hexamethyldisiloxane, 3-9 parts of vinyldisiloxane, 1-3 parts of emulsifier, 0.1-0.6 parts of catalyst, and 2-6 parts of acrylate monomer. The organofluorosilicone monomer is prepared by ring-opening reaction of hexamethylcyclotrisiloxane, trifluoropropylmethylcyclotrisiloxane, and hexamethyldisiloxane under the action of trifluoromethanesulfonic acid catalyst. Then, the emulsifier is used to emulsify the monomer to obtain organofluorosilicone emulsion I. This invention has a simple preparation method, can reduce dye affinity, and inhibit dye migration. Furthermore, by changing the amount of emulsifier, the particle size of the emulsion can be adjusted, and emulsions of different particle sizes can be mixed together to form a film with different roughness, thus achieving a deepening effect.

The application provides an amide-containing polyurethane elastomer and a preparation method and application thereof, and belongs to the field of high polymer materials. The application first provides an amide-containing chain extender, which is prepared from a diamine compound and a compound shown in formula I, a salt or a stereoisomer thereof. Then, the polyurethane elastomer is prepared by using the chain extender, and the polyurethane elastomer has excellent mechanical properties, and the water resistance, solvent resistance and oxidation resistance are significantly improved. In addition, the polyurethane elastomer is prepared by using a solvent-free preparation process, so that the use of organic solvents is avoided, the production environmental protection is improved, and the solvent recovery cost is reduced. Furthermore, the production process is simple, can be applied to large-scale industrial production, has high economic benefits and market competitiveness, and has a good application prospect.

This invention discloses a hyoscyamine derivative and its preparation method, relating to the field of drug synthesis, and aims to provide an effective and safe drug molecule for inhalation / local pulmonary administration. The invention prepares the hyoscyamine derivative by introducing a linear polyethylene glycol chain containing seven ethylene glycol repeating units at the hydroxyl position of hyoscyamine and quaternizing its nitrogen atom. This derivative is specifically designed for inhalation / local pulmonary administration. Through the above structural modification, it achieves reduced systemic absorption and central penetration of the compound, increased local lung exposure, and prolonged pulmonary retention time, while also maintaining good nebulization performance.

The application belongs to the technical field of building materials, and relates to low-thermal-conductivity concrete and a preparation method thereof. The application provides a preparation method of low-thermal-conductivity concrete, which comprises the following steps: modifying polypropylene fibers in a tannic acid solution and then modifying the polypropylene fibers in a polydimethylsiloxane solution to obtain modified polypropylene fibers; mixing a foaming agent and water to prepare a foaming solution; uniformly mixing cement, fly ash, the modified polypropylene fibers, an additive and water to obtain a mixture; foaming the foaming solution to generate foam, and then adding the foam into the mixture; and uniformly mixing to obtain the low-thermal-conductivity concrete. The application aims to solve the following technical problem: in the preparation process of foam concrete, although the addition of polypropylene fibers can effectively reduce the thermal conductivity of the foam concrete (to meet the low-thermal-conductivity requirement), the strength of the foam concrete is significantly reduced, and finally the low-thermal-conductivity performance and the high-strength performance of the concrete are difficult to be simultaneously considered.