228 results about "Active point" patented technology

The invention provides a novel preparation method of a high-performance continuous ZIF-8 (zero insert force-8) film for the high-performance separation and purification of gas, and mainly aims at solving the combination problem among a continuous even growth film, a film and a carrier of the ZIF-8 film. The preparation method is mainly characterized by comprising the following steps of: previously introducing growth point and a combination point on the surface of a porous carrier to form a thin layer of zinc oxide coating layer taken as a finished film, and growing in an inducing way to form the continuous even ZIF-8 film. An active point of the film homogeneous nucleation is introduced, the combination force problem between the film and the surface of the carrier is solved, and the surface of the carrier is modified by the coating layer, so that the high-quality film can be preferably formed. Compared with the conventional preparation method of the ZIF-8 film, the novel method adopted by the invention not only is high in film-forming effective mass, simple in process, and convenient for large-scale preparation and amplification, so that the method has a potential application prospect and a wide application value.

Processes for selecting, manipulating and arranging data points or pixels derived from information bearing signals are useful to reduce the bandwidth of, or improve the perceived quality of, such a signal as transmitted and displayed. The techniques utilize time-varying sampling schemes and take into account the characteristics of the human visual system. For each information frame, a subset (3) of all possible data points (1) is selected (2). A further subset of active data points (5) is selected (4) for which data will actually be sampled. The active points (5) are further divided (6) into points for which a value will be transmitted (x-points) (7) and points which will be sampled but for which no separate value will be transmitted (o-points) (8). A mathematical association between the x-points and o-points is made (9) and new values to be transmitted are calculated for the x-points (10). The parameters of the selection and association processes are varied in a non-trivial manner and the, now modified, cycle repeated (11) for subsequent data frames. In particular, the techniques may be used to process a high-definition television signal prior to its storage, or transmission over a low-bandwidth channel.

The invention provides a Co3O4 nano hollow sphere material and a preparation method and the application thereof. The preparation method of the Co3O4 nano hollow sphere material comprises the following steps of: mixing cobalt salt, surface active agent, precipitant with water according to stoichiometric ratio; putting mixed solution into a reaction kettle to perform hydro-thermal reaction, washing and drying to obtain a powdered mixed precursor; and heat treating the precursor in air to finally obtain the Co3O4 nano hollow sphere material. The obtained Co3O4 nano hollow sphere material has a regular surface nano piece layer and an internal hollow network structure, has a better electrochemical behavior, can be used for a cathode of a rechargeable lithium ion battery, can guarantee the electrolyte to be sufficiently permeated, can provide more electric active points with an increased contact surface, guarantees the lithium ion to better perform an embedding / withdrawing electrochemical behavior, enlargers the specific surface area, and improves the lithium storage capability. The internal network structure also shortens the reaction path of the lithium ion, i.e. shortens the conduction path of the e-and the Li+, thereby improving the characteristic of multiplying power.

The invention discloses an electrolyte solution and a lithium-ion secondary battery. The electrolyte solution comprises an aprotic organic solvent, electrolyte lithium salt and an additive, wherein the additive is cyclic phosphoric anhydride; and the mass of the additive accounts for 0.01-10 percent of the total mass of the electrolyte solution. The lithium-ion secondary battery comprising the electrolyte solution can be subjected to electrochemical oxidation polymerization under the voltage of over 4.4V (vs.Li / Li+). By forming a polymer on the surface of a positive pole material, a good barrier is formed to cover strongly-oxidative active points of the positive pole material, and decomposition of a main solvent of the lithium-ion secondary battery is inhibited, so that the stability of the electrolyte solution under a high-voltage state and the high-voltage cycle and storage performances of a lithium-ion battery are improved.

The invention discloses a photocatalyst of loaded nonmetal nitrogen doping one-dimensional TiO2 for exciting visible light and a preparation method thereof. In the method, a metal Ti plate and concentrated alkaline solution is taken as the main raw materials, visible light photocatalyst of the loaded nonmetal nitrogen one-dimensionally doping TiO2 is prepared by acidification, ion exchange and following heat treatment and by hydrothermal technology. The photocatalyst prepared by the invention is characterized in that the doping of nitrogen leads the catalysis to absorb the visible light and the absorption wavelength red shift is 600nm; the catalyst self is a in loaded style, which solves the defect that granulated catalyst is easy to fall off; the catalyst has a one-dimensional structure, large specific surface and abundant active points, which is favorable for strengthening reaction and mass transport process, thus realizing the degradation of typical indoor air contamination, compared with granulated nitrogen doping TiO2, the activity is higher to 1.2-3.0 times.

A system and method of real-time collision detection between solid geometric modes is provided. The system includes a computer system and at least one computer-generated geometric model stored in the memory of the computer system. The system also includes a haptic device in communication with the computer system, and the haptic device includes a haptic end effector for transmitting information between a user and the geometric model. The method includes the steps of representing one object from the geometric model as a point cloud and another object as a mesh, and at least one of the objects is moving, and partitioning the mesh into an organized data structure. The method also includes the steps of identifying a constraint set and identifying a collision set. The method further includes the steps of rendering the constraint set by moving the colliding objects so that the set of active points do not penetrate into the mesh, and providing force feedback to a user through a haptic device relative to how much the two objects had to be moved to satisfy the constraints.

The invention relates to an electrode for electrochemical reduction of CO2 and preparation of formic acid and a preparation method and an application thereof, and belongs to the field of a carbon dioxide resource technology. A traditional metal electrode has smooth surface and few catalytic active sites, which are not beneficial to rapid reaction. According to the invention, foamy copper with high specific surface is used as a substrate, and a layer of a low-melting-point metal catalyst is electroplated on the surface of the foamy copper so as to effectively raise reaction rate. The foamy copper can undergo surface electroplating in different formulations of electroplate liquids. The electroplated electrode still maintains a porous structure of foamy copper. The low-melting-point metal coating on the surface can efficiently electro-catalyze carbon dioxide to prepare formic acid. By the method, insufficiency of low surface catalytic active point of a traditional metal electrode can be improved. High Faradic efficiency of electrochemical reduction of CO2 and preparation of formic acid is guaranteed, and generation speed of formic acid also can be accelerated. The method is expected to be applied in the industrial process.

The invention relates to a simple solvothermal growth method for preparing an oriented growing metal organic skeleton nanometer slice film. The method comprises the following steps: introducing a positioning active point for the oriented growth of the metal organic skeleton nanometer slice film on the surface of a carrier, namely, growing a layer of nanoscale zinc oxide as the positioning active point for metal central ion coordinate on the carrier surface through hydro-thermal synthesis, thereby acquiring a carrier with ZnO nanometer layer positioning active point; putting the carrier into a synthesis solution of the metal organic skeleton nanometer slice film and compounding through a solvothermal system; and controlling growth, thereby forming the continuous and uniform horizontal or vertical oriented metal organic skeleton nanometer slice film. The preparation method solves the problem of difficulty and complexity of preparation of a metal organic skeleton nanometer slice film and has the advantages of simpleness, convenience, capability of forming film on large-area carriers and excellent amplifying and application prospect.

A method and massage device for stimulating active points located on a back of a user. The massage device includes a hollow body that can be filled with a filler material and sealed is described. The hollow body is made of a material allowing elastic deformations of walls of the hollow body under applied pressure when the body is pressed against a human's back. The hollow body comprises a first pair and a second pair of projecting portions. The projecting portions are spaced apart from each other by a distance substantially equal to the distance separating the first lines of the bladder meridian and the second lines located on the left and right sides of a human body, respectively. The method includes filling the hollow body with a hot fluid in the amount sufficient to provide required elastic deformations of the walls of the hollow body under applied pressure when the hollow body is pressed against the user's back, sealing the hollow body, and then pressing the massage device against the user's back such that the first pair of projecting portions and the second pair of projecting portions are applied to predetermined regions on the first and second lines of the bladder meridian.

The invention discloses a method for preparing a chelating fiber material capable of adsorbing heavy metals in water. According to the preparation process, only the surface layer of a finished fiber material is subjected to activating and grafting reaction in a low-temperature plasma field, the reaction is not carried out in the fiber material, and the treatment conditions are mild; and meanwhile, the fiber surface is multiple in active points, high in grafting rate and high in heavy metal chelating capacity, and the capacity is controllable. The method disclosed by the invention comprises the following steps: activating the melt-blown polypropylene fiber surface by using plasma, and generating lots of macromolecular radicals; allowing the macromolecular radicals to contact with air, so that the PP fiber surface is covered with organic peroxides or hydrogen peroxide; performing graft polymerization on the PP fiber surface by using a glycidyl methacrylate monomer; and finally, enabling an epoxy functional group on GMA to react with diethylenetriamine, thereby obtaining the chelating fiber material capable of adsorbing heavy metals in water.

The invention relates to a manufacturing method of a micro cantilever beam sensor using functional carbon nano tubes as sensitive materials, belonging to the field of a micro-nano sensor. The method is characterized by comprising the following steps: using multi-walled carbon nano tubes as manufacturing materials of the sensor, and pretreating with strong acid to form reaction-active points which can be functionally modified on the surfaces of the multi-walled carbon nano tubes; then, fixing the multi-walled carbon nano tubes onto the gold surface of the MEMS sensor according to the molecular self-assembly technology; and finally, carrying out functional group modification again on the carbon nano tubes fixed on the gold surface of the MEMS sensor according to chemical properties of target gas to be detected (for example, a certain hydrogen bonding effect and the like exist between ammonia gas and carboxyl as well as formaldehyde and amino group) based on the molecular design, and enabling the sensor to be used for the detection of special target gas.

The invention discloses a preparing method of a waterproof electric-breakdown-resisting coating, and belongs to the technical field of plasma chemical vapor phase deposition. According to the method, a base material is placed in a reaction cavity, continuous vacuum pumping is carried out, and inert gases or nitrogen is led in; monomer steam is led to start plasma discharge, the waterproof electric-breakdown-resisting coating is prepared on the surface of the base material; the monomer steam is a mixture of at least one kind of single-functional unsaturated fluorocarbon resin and at least one kind of polyfunctionality unsaturated hydrocarbon derivatives, wherein the mass percent of the polyfunctionality unsaturated hydrocarbon derivatives in the monomer steam ranges from 30% to 50%. Extra cross-linked points are led in by introducing of other monomer components with polyfunctional group cross-linked structures to form a cross-linked structure; plasma is broken by active base groups with high energy in the monomer components to form active points, the introduced extra active points are subject to cross-linking polymerization under the plasma environment to form a compact net-shaped structure, hydrophobicity of a thin film is ensured, and the property of corrosion resistance and underwater powering resistance of an electronic product is improved.

The invention discloses an aluminum-zinc-tin system sacrificial anode material and a preparation method thereof, wherein the material comprises the following components in percentage by weight: 5.0-8.0% of Zn, 0.05-0.2% of Sn, 0.01-0.05% of Ga, and the other is Al. Compared with an existing AlZn-Sn anode material, the aluminum-zinc-tin system sacrificial anode material briefly has the advantages that firstly, the aluminum-zinc-tin system sacrificial anode material of the invention has good activation performance, and reaches the reasonable range -1.0-1.1V(SCE) of protection potential, secondly, a minute quantity of Ga, Ga and Sn are added into the aluminum-zinc-tin system sacrificial anode material and are dissolved in solution in an ion state, tin ions are firstly restored to the original state, and deposit on the surface of an aluminum anode, and gallium ions also deposit on the deposited tin, thereby a Ga-Sn alloy active point with good flowing performance is continuously formed on the surface, oxidation film is partly separated, the aluminum anode has higher electric current efficiency and uniform surface dissolve performance, thirdly, the current efficiency of the aluminum-zinc-tin system sacrificial anode material of the invention can reach above 93% through micro-alloying, and the actual capacitance quantity reaches above 2620A.h.kg-1.

The invention discloses a preparing method for a coating with the controllable crosslinking degree, and belongs to the technical field of plasma chemical vapor deposition. The method mainly comprises the following steps that firstly, a base material is placed in a reaction cavity of a plasma chamber, the reaction cavity is continuously subjected to vacuum pumping, the vacuum degree in the reaction cavity reaches 10-200 millitorrs through pumping, the reaction cavity is inflated with inert gases or nitrogen, and a stable plasma environment is provided; then, the reaction cavity is inflated with monomer steam, plasma discharge is started, and chemical vapor deposition is conducted; and discharge is ended, a plasma power source is turned off, inflation of the monomer steam is stopped, vacuum pumping is continuously conducted, and after the vacuum degree of the reaction cavity is kept to range from 10 millitorrs to 200 millitorrs for 1-5 min, inflation of the atmosphere is conducted to one atmospheric pressure, and then the base material is taken out. According to the preparing method, through introduction of polyfunctionality monomer, a dense net-shaped structure is formed by the coating, the material is endowed with good physical and chemical durability, and meanwhile the material can be endowed with excellent waterproof and oil preventing functions; and the binding force and the mechanical strength are improved through combination of the base material and monomer active points.

A method for improving the quality of a SiC layer by effectively reducing or eliminating the carrier trapping centers by high temperature annealing and a SiC semiconductor device fabricated by the method. The method for improving the quality of a SiC layer by eliminating or reducing some carrier trapping centers includes the steps of: (a) carrying out ion implantation of carbon atom interstitials (C), silicon atoms, hydrogen atoms, or helium atoms into a shallow surface layer (A) of the starting SiC crystal layer (E) to introduce excess carbon interstitials into the implanted surface layer, and (b) heating the layer for making the carbon interstitials (C) to diffuse out from the implanted surface layer (A) into a bulk layer (E) and for making the electrically active point defects in the bulk layer inactive. After the above steps, the surface layer (A) can be etched or mechanically removed. The SiC semiconductor device is fabricated by the method.

The ester ether compound with high acidolysis activity is synthesized through the reaction between benzil acid (2,2-diphenyl glycolic acid) and phenols, each of which has at residual active point in its benzene ring, in the presence of p-toluene sulfonic-acid catalyst in 0.1-2 % and methyl benzene, dimethyl benzene and other benzene compound as solvent to synthesize a serial addition compound of benzil acid and phenols which may be further dewatered to produce lactone compound; and the etherification of the said addition compound or the lactone compound the ether compound, such as vinyl ethylether, dihydropyran, dihydrofuran, dihyidropyrrole, etc. at below 70 deg.c. The ester ether compound may be used as photothermal imaging information record material.

The invention discloses a composite gasoline desulfurizing agent loading heteropoly acid ionic liquid and application thereof and belongs to the technical field of oil processing. The composite gasoline desulfurizing agent is prepared loading heteropoly acid ionic liquid to MOFs (metal organic frameworks) by means of impregnation, wherein 10-50% by weight of the heteropoly acid ionic liquid is loaded in the MOFs; the MOFs used herein have the advantages such as structural stability, large specific surface area and pore diameter rule adjustability, and the problems of a conventional support such as low loading capacity, non-uniform distribution, proneness to catalyst loss, and proneness to active point poisoning; by introducing the heteropoly acid ionic liquid, it is possible to effectively catalyze oxidative sulfone-forming reaction of various thiophenic sulfides and it is possible to significantly improve desulfurization effect. In specific gasoline desulfurization, the composite gasoline desulfurizing agent has the advantages such as mild reaction conditions, good removal effect, low oil loss, zero significant effect on oil quality, and good reusability.

The invention relates to a method for preparing nanometer titanium dioxide (TiO2) which is used as the substrate of honeycomb catalyst for denitrating the waste flue gas from the coal burning boiler of a power plant, the furnace and the kiln of a cement plant and the refuse incinerator on the basis of the selective catalytic reduction (SCR) technology. The method comprises the following steps: (1) washing metatitanic acid with deionized water to remove impurities, and filtering and pressing the metatitanic acid into a filter cake; (2) preparing the filter cake, barium carbonate and deionized water into TiO2 sol or preparing the filter cake and deionized water into TiO2 suspension; and (3) delivering the TiO2 sol or the TiO2 suspension into a rotary kiln to dry and calcine the TiO2 sol or the TiO2 suspension to obtain the high-performance barium nanometer TiO2 containing barium or the high-performance barium nanometer TiO2 containing no barium. The method has simple preparing steps and low cost and ensures that the prepared nanometer TiO2 has more acidic and active points on surface, moderate specific surface area and good dispersity and the denitrating catalyst which is prepared from the nanometer TiO2 used as the substrate and other components has high activity, good thermostability and high mechanical strength.

The invention relates to a preparation method of a Ziegler-Natta catalyst for efficiently preparing low entanglement polyethylene and an application. The preparation method comprises the following steps that a prepared alcohol absorbing porous carrier and a prepared polyhedral oligomeric silsesquioxane molecule / Mg mixture are stirred in tetrahydrofuran and filtered, solid powder is dried until the solid powder flows freely, and a carrier used for preparing the low entanglement polyethylene catalyst is obtained; then, a carrier of an aluminium alkyl modified catalyst is prepared through the aluminium alkyl; and finally, a TiC14 tetrahydrofuran solution is added into the carrier of the aluminium alkyl modified catalyst, after stirring, the solid powder is washed by means of the tetrahydrofuran solution and dried until the solid powder flows freely, and the Ziegler-Natta catalyst for efficiently preparing the low entanglement polyethylene is obtained. POSS can be assembled into a microsphere with particle diameter being 20-100 nm in a pore passage of the porous carrier. The active points are divided effectively. The intervals between active centers are increased. The occurrence of chain overlapping in the polymerization process is restrained. The low entanglement polyethylene Ziegler-Natta can be prepared efficiently with the polymerizing temperature being higher than or equal to 60 DEG C.

The invention discloses an ESPR-based heavy metal analyzer, which comprises a chemical reaction part, a surface plasma resonance spectrometer and an information processing system, wherein the chemical reaction part includes a detection cell, a counter electrode, a reference electrode, an array electrode and an electrochemical workstation; the array electrode is positioned at the bottom of the detection cell, the counter electrode and the reference electrode are inserted in the detection cell, the counter electrode, the reference electrode and the array electrode are respectively connected to the electrochemical workstation; the electrochemical workstation and the surface plasma resonance spectrometer are respectively connected to the information processing system. The invention further discloses an analysis method of the ESPR-based heavy metal analyzer, which achieves the simultaneous detection of multi-objective heavy metals, enhances the detection sensitivity and spatial resolution, and reduces damages on thin metallic membrane plate (the array electrode and active points thereof).

Disclosed is a hydrogen storage material and a production method thereof. The hydrogen storage material has a carbon material having: an interlayer space for hydrogen occlusion, produced by removal at least a portion of an organic compound from a graphite intercalation compound comprising graphite and the organic compound intercalated in the graphite; and an active point at which hydrogen is adsorbed, being produced on the remaining organic compound and / or a part of the hexagonal carbon layers defining the interlayer space. It has a layered lattice structure with hexagonal carbon layers and an expanded interlayer space, and its density determined in accordance with He equilibrium pressure density measuring method changes according as pre-equilibrium He pressures and falls in a range of 0.2 to 1.2 g / cm3 at pre-equilibrium pressures of 0.2 MPa and 0.8 MPa. The hydrogen storage material is produced by; preparing an organic-graphite intercalation compound; and reducing the organic-graphite intercalation compound to remove at least a portion of the inserted organic compound from the organic-graphite intercalation compound, thereby forming an interlayer space.

The invention relates to a preparation method of a graft copolymer of nano cellulose and aliphatic polyester. The preparation method comprises the following steps of: adding cellulose as a raw material into a certain concentration of acidic solution, acidulating for a certain time under heating and stirring conditions, then centrifugally separating, collecting solids, washing with distilled water till neutralizing, freezing and drying to prepare the nano cellulose; then initiating the ring-opening polymerization of Epsilon-caprolactone and lactide monomer by taking hydroxyls in nano cellulose molecules as an initial active point and stannous octoate as an initiating agent under water-free and oxygen-free conditions to obtain the grate copolymer of the nano cellulose and the aliphatic polyester, wherein the grate copolymer is completely biodegradable. The nano cellulose grafted aliphatic polyester material is even to disperse in a substrate of a polyester material, and has excellent plasticity and machinability, acid resistance, alkali resistance and waterproofness.

The invention relates to an interface-enhanced carbon fiber / polycaprolactam composite material and a preparation method thereof, and specifically discloses a preparation method of the interface-enhanced carbon fiber / polycaprolactam composite material. Specifically, carbon fibers are adopted to be reacted with hexachlorocyclotriphosphazene with multiple functional groups to improve reaction active points of carbon fiber surfaces, polycaprolactam is compounded with the carbon fiber surfaces by the in situ grafting way in the ring-opening polymerization process, thereby effectively improving interface strength of the carbon fiber polycaprolactam and the matrix polycaprolactam and overcoming the defects that grafting degree of polycaprolactam on the carbon fiber surfaces and improvement degree in interface performance of the composite material are low in an existing method.

The present application relates to the field of energy storage materials, in particular to an electrolyte and an electrochemical device. The electrolyte solution of the present application contains additive A, additive B and additive C, and additive A is selected from the group consisting of Formula I-1. Formula I-Formula I-3, additive B is selected from at least one of the sulfonate compounds, and additive C is selected from at least one of the halogen-substituted cyclic carbonate compounds. The electrochemical device of the present application contains the electrolyte. The electrolyte of thepresent invention can effectively passivate the surface activity of the positive electrode material, inhibit the oxidation of the positive electrode material to the electrolyte, effectively reduce the gas production of the battery, and form a more stable SEI film adsorbed on the catalytic active point on the surface of the graphite, thereby significantly reducing the occurrence of side reactions.The electrochemical device using the electrolyte of the present application has excellent high temperature and high pressure cycling performance and storage performance. (image. file= 'DDA0001350629020000011. TIF' wi= '700' he= '224' / )

The invention provides a preparation method of a carbon nanotube cladded selenium-based catalyst for electrolyzing water to produce hydrogen. According to the preparation method, selenium dioxide is used as a selenium source and N,N-dimethylformamide is used as a complexing agent and a reducing agent; transition metal salt is added to react, so as to obtain a transition metal selenide nano-wire active substance; then a carbon nanotube layer is prepared and is used for carrying out surface cladding on the active substance, so that the inner part of a carbon nanotube is uniformly covered with the active substance; corrosion, caused by a strong-acidity or strong-alkalinity electrolyte solution, on the catalyst is avoided, the stability of a catalytic material is improved and the problem thata traditional catalyst is easily corroded by electrolyte is solved. Furthermore, the carbon nanotube layer is used for carrying out the surface cladding on the active substance, so that the charge transport capability in an electro-catalysis process is improved; meanwhile, a transition metal selenide nano-wire aggregation effect can be effectively prevented, and a larger substance transport surface and a catalytic active point are provided for electro-catalytic hydrogen evolution reaction.

The invention provides a method and system for extracting group behavior characteristics of mobile phone track data clustering. Time sequence tracks of individuals are obtained by acquiring mobile phone track data, the spatial repeatability and time periodicity of the time sequence track of each individual are counted, and the to-be-processed track data is generated; individual active points are extracted from the to-be-processed track data, candidate active point track data corresponding to each individual is obtained, simplification and completion processing are carried out on the candidateactive point track data, and active point track data of each individual is obtained; the similarity between the active point track data of the individuals is calculated; a plurality of active point tracks belonging to different track types are obtained according to the similarity, and the group behavior characteristics are extracted. According to the method and the system, high-efficiency processing of the mobile phone track data and intelligent extraction of a space-time multi-resolution behavior pattern are achieved, and large-scale human activity analysis is supported.

A diagnostic method comprises selecting 24 biologically active points (BAPs), measuring the skin resistance at the points, plotting the average resistance for the points as an isoelectric line and defining a normal corridor. A stimulation is applied to each of the points and thereafter the skin resistance is once again measured. The results of the two sets of measurements are compared and diagnostic conclusions are reached from their comparison.

The invention discloses optical catalyst of one dimension nanometer structure TiO2 adulterated with cation S and anion N, the preparation method is as follows: (1) with water-thermal method, nanometer TiO2 powder, TiO2 colloid or Ti(OH)4 and alkaline solution is mixed together to form mixed suspension for water-thermal reaction; (2) cooling is adopted, sediment is filtered and cleaned and then white hydrogen titanium acid is realized; (3) hydrogen titanium acid, thiourea and solution is mixed to form mixed suspension, ultrasound treatment is conducted for stirring, and uniform mixture of hydrogen titanium acid and thiourea is realized after drying; (4) uniform mixture of hydrogen titanium acid and thiourea is calcinated and then optical catalyst of one dimension nanometer structure TiO2 adulterated with cation S and anion N is realized. Catalyst provided by the invention has one dimension structure and lavish active point position and is good for improvement of reaction activity, moreover, catalyst can accelerate mass transfer of pollutant to catalyst, and therefore photocatalysis rate is improved; special one dimension structure and non-metal dual adulteration of the invention lead to good visible-light catalytic activity.

The present invention provides a method for forming a surface graft, comprising the process of applying energy to the surface of a substrate containing polyimide having a polymerization initiating moiety in the skeleton thereof, to generate active points on the surface of the substrate and to generate a graft polymer that is directly bonded to the surface of the substrate starting from the active points and that has a polar group, and a surface graft material obtained thereby. The present invention also provides a method for forming a conductive film, comprising the processes of applying energy to the surface of a substrate containing polyimide having a polymerization initiating moiety in the skeleton thereof, to generate active points on the surface of the substrate and to generate a graft polymer that is directly bonded to the surface of the substrate starting from the active points and that has a polar group, and causing a conductive material to adhere to the graft polymer, and a conductive material obtained thereby.