177results about How to "Improve interface performance" patented technology

The invention provides a high wear-resistant wood-plastic composite and a preparation method thereof, and relates to a composite obtained by mixing modified plant fiber powder, modified nano ceramics particles and plastic powder. The high wear-resistant wood-plastic composite comprises the modified plant fiber powder, the modified nano ceramics particles, the recycled plastic powder and the like, wherein the modified nano ceramics particles comprises modified nano Al2O3, modified nano Si3N4, modified nano SiC or the mixture thereof, which can obviously improve the microhardness of the wood-plastic composite, reduce the wear rate and improve the mechanical property. The high wear-resistant wood-plastic composite is prepared from the components by the common melt-mixing method in the plastic processing. The surface hardness and the wearability of the wood-plastic composite are greatly increased, and the strength and the toughness are also greatly improved, so that the overall performance of the wood-plastic composite is greatly enhanced. The wood-plastic composite can be used in the fields of construction material, furniture, package and the like.

The invention provides inorganic heat radiation nano-grade material aqueous slurry, a heat radiation material comprising the inorganic heat radiation nano-grade material aqueous slurry, and preparation methods and applications thereof. The inorganic heat radiation nano-grade material aqueous slurry comprises the components comprising, by weight, 10-25 parts of an inorganic heat radiation nano-grade material, 0.5-20 parts of a modifier solution, and 50-100 parts of a solvent. The heat radiation material comprises, by weight, 10-30 parts of the inorganic heat radiation nano-grade material aqueous slurry, 40-80 parts of aqueous high-molecular resin, 20-30 parts of latex, 10-40 parts of a film-forming auxiliary agent, 0.5-5 parts of an auxiliary agent, and 5-20 parts of a diluting agent. With the application of the inorganic heat radiation nano-grade material aqueous slurry, compatibility and system dispersion stability of the inorganic heat radiation nano-grade material and the high-molecular material are improved, such that the unique heat radiation material with excellent heat radiation performance and with the inorganic heat radiation nano-grade material aqueous slurry is obtained.

The invention relates to inorganic heat-dissipation nano-material aqueous slurry and a novel heat-dissipation material containing the inorganic heat-dissipation nano-material aqueous slurry and a preparation method of the novel heat-dissipation material. The inorganic heat-dissipation nano-material aqueous slurry comprises, by weight, 10 to 25 parts of an inorganic heat-dissipation nano-material, 0.5 to 20 parts of a modifier or a modifier solution, and 50 to 100 parts of a solvent. The novel heat-dissipation material comprises, by weight, 10 to 30 parts of the inorganic heat-dissipation nano-material aqueous slurry, 40 to 80 parts of an aqueous polymer resin, 20 to 30 parts of latex, 10 to 40 parts of a film forming auxiliary agent, 0.5 to 5 parts of an auxiliary agent and 5 to 20 parts of a diluent. The novel heat-dissipation material has excellent heat-dissipation performances.

The invention discloses a multi-scale reinforcement body that carbon nano-tube is connected with carbon fiber and a preparation method aiming at solving the drawbacks of increasing rigidity at the interface, lowering toughness of material and not improving performance of resin base between the fibers and between carbon fiber plywoods after prior carbon fiber treatment is made. The multi-scale reinforcement body of carbon nano-tube connecting carbon fiber is made through combining between a carbon nano-tube decorated by 1, 6 hexamethylenediamine and carbon fiber with acyl chloride functional group on the surface. The preparation method comprises: the carbon nano-tube decorated by 1, 6 hexamethylenediamine and the carbon fiber with acyl chloride functional group on the surface are prepared before put into N,N-dimethylformamide for reaction, thereby getting the multi-scale reinforcement body of carbon nano-tube connecting carbon fiber. The invention has the advantages of big activity on the surface, a plurality of chemical activated functional groups, strong reactive activity, good cohesiveness with the base, improving shearing intensity at the interface for composite material by 127.5% to 144.7% and improving toughness for the base by 34.43% to 48.67%.

Nanoscale chemicals based on polyhedral oligomeric silsesquioxanes (POSS) and polyhedral oligomeric silicates (POS) are taught as lubricants, mold release agents, and as additives to control the viscosity, lubrication, wear, and thermal properties of conventional lubricous materials. The precisely defined nanoscopic dimensions of POSS materials enable viscosity, miscibility, and thermal properties to be (increased) or reduced (decreased) as desired. A key feature to the successful tailoring of properties is the inherent thermal and chemical stability of the POSS/POS nanostructure and the ability to control its topology and chemical potential to match that of surfaces and other materials.

The invention provides an organosiloxane room temperature ionic liquid electrolyte material and its application in an electrochemical power storage device. The material is room temperature ionic liquid whose cationic chemical structural formula contains organosiloxane, and the cationic chemical structural formula is as represented by formula I in the specification. In the formula I, R1, R2 and R3 are selected from same or different C1-C10 alkyl groups; M is an ether chain having a structure like (CH2)nO[(CH2)mO]x(CH2)y, wherein, n and m are integers of 0 to 10, and x and y are integers of 0 to 10; R4, R5 and R6 are selected from same or different C1-C10 alkyl groups or alkyloxy groups or -O-SiR7R8R9, wherein, R7, R8 and R9 are C1-C10 alkyl groups or hydrogen, and at least one of R7, R8 and R9 is an alkyl group. The organosiloxane room temperature ionic liquid provided in the invention can be applied in lithium ion batteries as an electrolyte material or an additive; oxygen atoms of the ether chain in the cationic chemical structural formula of the ionic liquid and lithium ions Li<+> can undergo complexation, which promotes dissociation degree of lithium salt in the ionic liquid; furthermore, a cationic skeleton both contains hydrophobic organosilicon groups and hydrophilic ether (polyether) chain segments, which is favorable for improving interfacial properties of batteries.

The invention aims at solving a ceramic tile dropping problem caused by low water absorption and a smooth interface of the existing ceramic file, especially a vitrified porcelain tile, and provides a double-component ceramic tile interface agent for improving interface performance and construction performance of a ceramic tile. The double-component ceramic tile interface agent comprises a component A and a component B, wherein the component A comprises cement, quartz sand, metakaolin and a thickener; the component B comprises a water reducing agent, a flexibilizer, a penetrating agent, a dispersing agent, an antifoaming agent, a bactericide, an accelerator, a season regulator and water. According to the invention, two strength forming materials of multiple polymers and cement are used at the same time, so that possibility of forming an interface for a second time is reduced, and bonding strength of the interface agent and the ceramic tile is improved. Besides, while construction time is ensured, setting time is shortened, construction performance is effectively improved, and long-term aesthetic sense of the ceramic tile is ensured.

The invention relates to a binary alkali-free complex composition for flooding, suitable for high-temperature and high-salinity reservoir, and application of the composition. The binary alkali-free complex composition for flooding is composed of the following components measured by total weight of the binary alkali-free complex composition for flooding: 0.05-0.3% of complex surfactants, 0.1-0.25% of polymers and the balance of water; wherein the compound surfactants are composed of two kinds of hydroxysulfobetaine with different structures and a mass ratio of 9: 1-4: 6. The invention further provides the application of the binary alkali-free complex composition for flooding in tertiary oil recovery. According to the binary alkali-free complex flooding composition provided by the invention, interface performance exceeds the performance of the composition simply utilizing erucamide hydroxysulfobetaine as surfactants to achieve ultralow interfacial tension, and at the same time, the interfacial tension of the composition in a long term can be kept at an ultralow state; and oil recovery cost also can be reduced.

The invention discloses pervious concrete with waste concrete serving as aggregate and a preparation method and application of the pervious concrete. The pervious concrete is prepared by steps: subjecting pretreated waste concrete to crushing and screening to obtain coarse aggregate and fine aggregate; soaking the coarse aggregate into acid solution, taking out, draining to dry, and adding sodiumsilicate or sodium metasilicate for surface modification; subjecting the fine aggregate, coal ash and coal gangue to smashing and grinding to obtain micron powder; premixing Portland cement, the micron powder, water, additives and a reinforcing agent, adding the modified coarse aggregate, and mixing to form the pervious concrete with waste concrete serving as aggregate. Interfacial properties of the coarse aggregate are improved, the coarse aggregate of the waste concrete and cement form a mechanical network, mechanical properties of the pervious concrete are improved, and durability and mechanical properties of concrete are improved by adjustment of component types and contents of the pervious concrete.

The invention discloses a lithium-sulfur secondary battery system. The system comprises a positive electrode, a negative electrode and electrolyte, wherein an active substance of the positive electrode is a carbon-sulfur composite material, the negative electrode adopts a metal lithium plate, the electrolyte is high-salinity non-aqueous electrolyte, and the high-salinity non-aqueous electrolyte comprises lithium salt, sodium salt or lithium-sodium mixed salt and non-aqueous organic solvent; and the mol ratio of the lithium salt or the lithium-sodium mixed salt and the non-aqueous organic solvent is 2 to 10 mol/L. The lithium-sulfur secondary battery system has the following remarkable advantages that since the electrolyte system can effectively prevent multi-sulfur ions of the lithium-sulfur battery from being dissolved in the electrolyte in the charging and discharging processes, the multi-sulfur ions which are dissolved in the electrolyte can be prevented from producing a shuttle effect at the last stage of the charging, the over-charge phenomenon can be prevented, and the coulombic efficiency can be improved to be more than 99 percent. Therefore, the cycling performance of the battery also can be greatly improved.

The main idea for solving the problem of excessively high residual alkalinity on a surface of a ternary material is in a way that the residual alkalinity on the surface of the material can be reducedby washing. Although the residual alkalinity on the surface of the high-nickel ternary material can be reduced after washing, and the lithium content after washing is reduced to cause that the specific capacity also can be reduced and the battery performance is affected. The invention discloses a method for improving residual alkalinity on a surface of a ternary positive electrode material of a lithium ion battery. The method comprises the following steps of mixing powdered Ni-Co-Mn layered positive electrode material with molecular formula being LiNi<x>Co<y>Mn<z>O<2> and water, and performingcentrifugal separation to obtain a washed powder material; adding a lithium source to absolute ethyl alcohol for uniformly mixing, adding the washed powder material for uniformly mixing, and performing complete evaporation, drying and sintering to obtain the ternary positive electrode material of the lithium ion battery. After washing, lithium supplement and secondary sintering are performed on the ternary material by an ethyl alcohol system, the lithium which is lost during washing is supplemented, and the performance of the material is improved; and moreover, the process flow is simple, andindustrial production is convenient to implement.

The invention provides a method for electrochemically modifying surface of ultrasonic-enhanced carbon fiber. The method comprises the following steps of: firstly, pretreating the surface of the carbon fiber material, secondarily, soaking the pretreated carbon fiber material into an electrolytic bath filled with strong electrolyte solution; and by taking the carbon fiber material as an electrochemically oxidized anode and graphite as an electrochemically oxidized cathode, guiding in current through control of a voltage-stabilizing power supply, wherein the current intensity is 1A/g-2A/g; and under the conditions of ultrasonic power of 200W-2000W, ultrasonic frequency of 20kHz-100kHz, and water bath temperature of 20 DEG C-70 DEG C, carrying out ultrasonic oscillation for three minutes to 15 minutes to produce surface modification, and finally washing and drying to obtain surface-modified carbon fiber. With the method, the surface roughness of the carbon fiber can be increased, the wetting property of the carbon fiber can also be improved due to introduction of polar group into the surface of the fiber, the binding property between the carbon fiber and a resin matrix can be enhanced, and the interface property of binding the carbon fiber with other materials can be increased.

The invention discloses a barium titanate/polymer composite material with a high dielectric constant and its preparation method. The composite material comprises the following components by volume: 1-60% of a single nucleus, 3-30% of an inner shell, and 20-80% of an outer shell. The single nucleus is composed of barium titanate ceramic particles, the inner shell is polyamide with a high dielectric constant, and the outer shell is polymethyl methacrylate with a low dielectric constant. The invention also relates to a preparation method of the composite material. The method includes: firstly using amino silane to perform surface treatment on the single nucleus, introducing an organic functional group, and then dispersing different products into different monomer solutions in order, thus obtaining the composite material with the nucleus-shell-shell structure connected by covalent bonds. The composite material has the characteristics of high dielectric constant, low dielectric loss, and uniformly distributed inorganic particles. The composite material provided in the invention is suitable for preparation of embedded capacitors, high energy storage capacitors, field emission triodes and other advanced electrical and electronic equipment.

The invention discloses a method for modifying polytetrafluoroethylene-aramid blended fabric jointly by dopamine-polyethyleneimine-nanoparticles; the method includes: adding polytetrafluoroethylene-aramid blended fabric, dopamine hydrochloride, polyethylenimine and nanoparticles into trihydroxymethyl-aminomethane/hydrochloride buffered solution, stirring, ultrasonically dispersing well, and continuously stirring at room temperature to allow for 2-24 h of reaction; after the reaction, taking out the blended fabric, sufficiently washing with deionized water to remove unreacted impurities on thesurface, and then drying in a vacuum oven to obtain the surface-modified polytetrafluoroethylene-aramid blended fabric. An organic-inorganic hybrid functional coating is constructed on the fiber surface through modifying; therefore, both active functional groups and greater surface roughness are imparted to the surface of the blended fabric, and the interface adhesion performance between the blended fabric and phenolic resin matrix can be improved through chemical bonding and mechanical interlocking.

The invention relates to a treatment method of volcanic-ash-paste-reinforced recycled concrete aggregate. The method comprises the following steps: (1) carrying out crushing treatment and screening on recycled concrete, and drying to obtain recycled aggregate; (2) adding water into a volcanic ash material with the particle size of less than 60 micrometers to prepare a volcanic ash paste, and carrying out ultrasonic dispersion to form a homogeneous paste solution; (3) immersing the dried recycled aggregate in the step (1) in the homogeneous paste solution prepared in the step (2), and stirring; (4) screening the mixture treated in the step (3) to remove the recycled aggregate, and filtering to remove the excessive paste solution; (5) drying the screened recycled aggregate, and carrying out kneading dispersion on the agglomerate aggregate; and (6) screening the recycled aggregate treated in the step (5) to obtain the volcanic-ash-paste-reinforced recycled concrete aggregate. Compared with the mortar prepared from the untreated recycled concrete aggregate, the 3-day compression strength and 28-day compression strength of the mortar prepared from the volcanic-ash-paste-reinforced recycled concrete aggregate are enhanced by 17% or above, the chlorine ion permeability coefficient is lowered by 30% or above, and the new/old interface microhardness of the mortar is enhanced by 30% or above.

The invention discloses a colored zirconia ceramic, which is composed of tetragonal phase zirconia serving as the main crystalline phase and cubic phase zirconia serving as a minor crystalline phase, or is composed of tetragonal phase zirconia serving as the main crystalline phase, cubic phase zirconia serving as a minor crystalline phase, and a transition metal oxide. The colored zirconia ceramic realizes coloring through a rare earth metal that is in a solid solution state in cubic phase zirconia crystal grains, or achieves coloring through a rare earth metal that is in a solid solution state in cubic phase zirconia crystal grains, and is assisted by the transition metal oxide provided transition metal for toning. According to the invention, coloring rare earth metal ions are in a solid solution state in cubic zirconia lattices, and have no influence to the stability of tetragonal zirconia; solid solution rare earth metal ions in cubic zirconia are mainly adopted for coloring, then the consumption of other transition metal oxide coloring materials can be reduced or even the coloring materials can be not used, thus reducing the influence of transition metal oxide coloring materials concentrated at crystal boundaries to sintering densification, and avoiding the adverse effect on material strength.

The invention relates to a ternary complex composition for flooding, suitable for high-temperature and high-salinity reservoir, and application of the composition. The ternary complex composition for flooding is composed of the following components measured by total weight of the ternary complex composition for flooding: 0.05-0.3% of complex surfactants, 0.1-0.25% of polymers, 0.05-2.0% of alkaline matters and the balance of water; wherein the complex surfactants are composed of two kinds of hydroxysulfobetaine with different structures and a mass ratio of 9: 1-4: 6. The invention further provides the application of the ternary complex composition for flooding in tertiary oil recovery. The ternary complex flooding composition of the complex surfactants provided by the invention is featured with high flooding efficiency and low cost of oleamide hydroxysulfobetaine, and is capable of reducing flooding cost.

The invention relates to a method for surface modification of carbon fiber, in particular to a method for surface modification of carbon fiber through graphene oxide, aiming at solving the technical problems of large surface inertia, low surface energy and poor mechanical and thermal properties of carbon fiber at present. The method comprises the following steps: I, preparing graphene oxide through a modification Hummer's method; II, performing oxidation treatment on carbon fiber; III, performing surface modification amination treatment on the carbon fiber; and IV, grafting the surface of the carbon fiber with the graphene oxide. After the surface of the carbon fiber is grafted with the graphene oxide, the surface wettability and adhesiveness of the carbon fiber are improved remarkably, the roughness of the carbon fiber is enhanced greatly, the transfer effect between a base body and a reinforcement body in a composite material is strengthened, interface properties are improved, the material is prevented from being damaged, and the mechanical properties and thermal stability of the composite material are further improved. The method is applied to the field of surface modification of carbon fiber.

The invention discloses a high-strength PE (polyethylene) wood-plastic composite material which is prepared from the following raw materials in parts by mass: 20-50 parts of waste PE plastic, 40-70 parts of plant fiber powder, 0-15 parts of thermoplastic elastomer, 2-6 parts of interfacial compatilizer, 0-20 parts of reinforcing filler, 1-6 parts of lubricant, 0.4-0.6 part of anti-aging assistant and 0.1-0.5 part of initiator. The invention also discloses a preparation method of the PE wood-plastic composite material, which comprises the following steps: 1) uniformly mixing the raw materials, and carrying out extrusion and granulation in an extruder; and 2) carrying out extrusion forming on the granules to obtain a plate. The wood-plastic composite material has excellent properties, such as favorable tensile strength, bending strength, bending modulus and the like. The interfacial compatilizer can effectively promote the interfacial properties of the substrate with other components, thereby enhancing the related properties of the composite material. The composite material has excellent workability, and can be sawed, nailed or shaven.

A ramie fiber reinforced polylactic acid composition is prepared through respectively dissolving the prepolymer of polylactic acid polycaprolactone in organic solvent, immersing the ramie fibers in the solution of polycaprolactone, adding another solution, sealing, and in-situ polymerizing at 60-100 deg.C for 0.5-4 hr. It has excellent interface and mechanical performance.

This invention discloses a kind of reactive inorganic nanoparticle/polymer composite materials which comprises 1~5wt% inorganic nanoparticles, 2.5~10wt% reactive compatilizers and 85~96.5wt% polymer matrix. In this invention, reactive compatilization technology is adopted, that is, inorganic nanoparticles react with polymer in situ during ordinary blending to produce grafted compounds, which greatly enhances the interfacial effect between inorganic nanoparticles and polymer matrix so that both the interfacial adhesion strength and the dispersion of inorganic nanoparticles in the matrix are greatly improved and mechanical properties of the prepared composite materials are effectively promoted. This invention requires no special apparatus or technique the composite materials with good comprehensive properties can be obtained with only common facilities.

The invention discloses a co-extrusion molding device for a wood plastic-solid wood composite material, relates to a co-extrusion molding device for a composite material, and solves the problem that a traditional wood plastic co-extrusion set is not suitable for co-extrusion of a rigid solid wood material. A co-extrusion mold is mounted on a machine head of a wood plastic extruder in a detachable manner; a solid wood conveying device and a cooling shaping device are respectively mounted at the left and right ends of the co-extrusion mold; after a solid wood quick connecting device, a solid wood conveyer, a far infrared drying machine and a glue applying device of the solid wood conveying device are connected in sequence from right to left, the glue applying device is connected with the right end of the co-extrusion mold; one end of a shaping mold of the cooling shaping device is connected with the left end of the co-extrusion mold, and the other end of the shaping mold is connected with a cooling water tank; the co-extrusion mold comprises a mold main body, a cold mold and a plurality of guide edges; the cold mold is mounted at the left end of the mold main body; and the plurality of guide edges are arranged on the inner wall of a solid wood feed main channel of the mold main body. The co-extrusion molding device is used for the co-extrusion molding of the wood plastic-solid wood composite material.

The invention relates to a POSS hybridized hole transporting material and a preparation method thereof. The material is prepared by at least one POSS monomer containing active groups and at least one organic monomer having hole transporting function by chemical reaction; wherein, the mass ratio between the POSS monomer containing the active groups and the organic monomer having the hole transporting function is 0.1 to 80 : 99.9 to 20. The material can be widely applied to the fields of electroluminescent elements, luminescent apparatuses, diodes, photovoltaic cells and photosensitive components, and the like..

The invention relates to a novel control method for improving lithium ion soft-package laminated battery diaphragm fold. The problem that the battery performance is influenced due to the fold of the soft-package laminated lithium ion battery diaphragm is solved. The control method comprises the following steps: laying down a battery after liquid injection, thereby ensuring that the electrolyte sufficiently infiltrates a pole piece; and then performing rolling on the lay-down battery, and controlling the pressure and speed of the rolling in the rolling process; pre-charging the battery after the rolling is ended; and performing secondary rolling on the completely pre-charged battery, further shaping the diaphragm, and releasing the gas to finish the secondary package. The contacting interface between a positive/negative pole piece and the diaphragm is better by comparing the lithium ion soft-package laminated battery prepared based on the control method with the battery without performing the rolling shaping, the dead lithium existing in the fold area caused by the diaphragm fold is avoided, thus the capacity of the positive/negative material is sufficiently played, and the batteryperformance is improved.

The invention relates to a preparation method of modified carbon nanotube/graphene-resin conductive fibers .The preparation method comprises the steps that a carbon nanotube/graphene composite spinning solution is subjected to wet spinning and drying to obtain carbon nanotube/graphene-resin conductive fibers; the coagulating bath adopted for wet spinning is a resin coagulating bath; under a stretching condition, the carbon nanotube/graphene-resin conductive fibers are subjected to subzero treatment, then the temperature is returned to room temperature and maintained for a period of time, and the modified carbon nanotube/graphene-resin conductive fibers are obtained .The material has broad application prospects in the electronic textile field, electromagnetic shielding field and intelligent wearable field .The subzero treatment technological process and subzero treatment equipment are simple in structure .Compared with other modification treatment processes, more energy is saved, more production cost is reduced, and good development prospects are achieved.

The invention provides a natural antibacterial and skin-care polypropylene fiber and a preparation method thereof. The raw material formula of the polypropylene fiber includes 65-90% of polypropylene slices, 5-16% of sea mud powder, and 2.5-90% of echinacea extract. 6%, 1.5-5% of herb extract, 0.1-1.3% of nonylphenol polyoxyethylene ether, 0.5-3% of Xinggu oilseed oil, 0.1-0.7% of ellagic acid, 0.1 of isopropyl myristate ~1.3, coupling agent 0.2~1.7. The above-mentioned raw materials are compounded reasonably and synergistically. Its fragrance is elegant and clear, and it has good compatibility and skin affinity. It not only has a wide antibacterial spectrum, good antibacterial effect and long-lasting effect, but also provides the necessary nutrients for skin cell renewal. Skin cleansing, to achieve comprehensive care for human skin, and better improve the spinnability, moisture absorption, air permeability, dyeing uniformity and mechanical properties of the fiber, can be widely used in the production of textiles and medicines that are in close contact with the human body Industrial work clothes greatly broaden the application field of sea mud.

The invention discloses a polyaryletherketone resin-based suspension sizing agent for carbon fibers and a preparation method thereof. The suspension sizing agent is composed of a polyaryletherketone resin, a dispersant, a stabilizer and deionized water. The suspension sizing agent has stable properties and can be used for preparing carbon fibers. The prepared sizing carbon fibers are suitable forintermediates such as carbon fiber fabrics and prepregs for polyaryletherketone resin-based composite materials, and have good processing performances and interface binding ability.

The invention discloses a multi-element toughened and modified special material for a PP-R pipe. The multi-element toughened and modified special material for the PP-R pipe comprises, by weight, 85-95 parts of PP-R resin, 1-5 parts of a toughening agent I, 2-5 parts of a toughening agent II, and 2-5 parts of inorganic rigid particles; the PP-R resin is a III type polypropylene randon coplymer and comprises natural color granules, colored granules and powder materials; main components in the toughening agent I, the toughening agent II and the inorganic rigid particles are all PP-R resin; the toughening agent I further comprises a beta nucleating agent; the toughening agent II further comprises elastomer and compatilizer; and the inorganic rigid particles further comprise inorganic rigid powder materials. The invention further provides a preparation method of the multi-element toughened and modified special material for the PP-R pipe; by preparing the toughening agent I, the toughening agent II and the inorganic rigid particles, then the low temperature toughed special material for the pipe is prepared in a compositing manner, and the method is simple. The special material for the PP-R pipe has a good toughening effect, the hydraulic performance of the pipe is not lowered, the rigidity of the pipe is improved, and good application prospects are achieved.

The invention discloses a microwave radiation treatment method and a microwave radiation treatment device for improving the surface activity of carbon fibers. The microwave radiation treatment method and the microwave radiation treatment device have the advantages that TE10 transverse electric waves are subjected to single-mode transmission in metal rectangular waveguides by the aid of microwave generated in a microwave generator, and the carbon fibers are subjected to radiation treatment by the aid of microwave energy via a flared antenna; the carbon fibers are etched by the microwave, accordingly, the depths of grooves in the surfaces of the carbon fibers can be increased, and the roughness of the surfaces of the carbon fibers can be improved; bonding of single crystals on the surfaces of the carbon fibers is destroyed under the radiation effects of the microwave, accordingly, active carbon atom points can be increased, O/C atomic ratios of the surfaces of the carbon fibers can be increased, and the contents of oxygen-containing active functional groups can be increased; surface energy of the treated carbon fibers can be increased, accordingly, the activity of the carbon fibers can be improved, and the microwave radiation treatment method and the microwave radiation treatment device are favorable for forming excellent interfaces between the carbon fibers and resin matrixes.

The invention relates to a low-temperature sand-prevention resin coated propping agent for an oil-gas well and a preparation method of the low-temperature sand-prevention resin coated propping agent. The low-temperature sand-prevention resin coated propping agent comprises a propping agent aggregate, a precuring reinforced resin membrane and a low-temperature sand-prevention resin membrane, wherein the precuring reinforced resin membrane is made of reinforced resin applied to the surface of the propping agent aggregate; the low-temperature sand-prevention resin membrane is made of low-temperature sand-prevention resin applied to the surface of reinforced resin; the reinforced resin is selected from epoxy resin and/or thermoplastic phenolic resin; the low-temperature sand-prevention resin is sulfonate polyester resin.