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

Carbon nano-tube connecting carbon fiber multi-scale reinforcing body and method for producing the same

InactiveCN101173386ATake full advantage of mechanical propertiesRealize chemical bond connectionFibre treatmentArtificial filament chemical after-treatmentFiberCarbon fibers
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%.
Owner:HARBIN INST OF TECH

Organosiloxane room temperature ionic liquid electrolyte material and its application in electrochemical power storage device

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.
Owner:GUANGZHOU ZHONGKE LIXIN MATERIALS TECH

Method for improving residual alkalinity on surface of ternary positive electrode material of lithium ion battery

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.
Owner:HEFEI GUOXUAN HIGH TECH POWER ENERGY

Method for electrochemically modifying surface of ultrasonic-enhanced carbon fiber

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.
Owner:NORTHWESTERN POLYTECHNICAL UNIV

Treatment method of volcanic-ash-paste-reinforced recycled concrete aggregate

ActiveCN106007438AIncrease the reactive surface area of ​​volcanic ashImprove interface performanceSolid waste managementVolcanic ashIon permeability
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.
Owner:HUNAN UNIV

Co-extrusion molding device for wood plastic-solid wood composite material

ActiveCN104210080AAddresses an issue where extrusion does not work with rigid solid wood materialsImprove the bonding strength of the interfaceCoatingsSolid woodMain channel
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.
Owner:王清文

Novel control method for improving lithium ion soft-package laminated battery diaphragm fold

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.
Owner:JIANGSU FRONT NEW ENERGY +1

Multi-element toughened and modified special material for PP-R pipe and preparation method thereof

ActiveCN106589619AImprove performanceToughening achievedElastomerGreek letter beta
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.
Owner:浙江中财管道科技股份有限公司

Microwave radiation treatment method and microwave radiation treatment device for improving surface activity of carbon fibers

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.
Owner:XI AN JIAOTONG UNIV
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