246 results about "Surface chemical" patented technology

The invention discloses a preparation method of 3, 4-dihydroxy benzaldehyde / gelatin carbon nanomaterial-based adhesive hydrogel, and belongs to the technical field of hydrogel. According to the invention, 3, 4-dihydroxy benzaldehyde and gelatin are adopted as carbon sources, the synthesized nano-filler has amphiphilic surface characteristics, uniform dispersion of the nano-filler in a hydrogel network can be promoted, meanwhile, a mechanically firm and deformable nano-composite structure is established by utilizing the interaction of multivalent interfaces, and 3, 4-dihydroxy benzaldehyde and gelatin are added into the hydrogel network. The surface chemical property of the 1, 4-dihydroxybenzaldehyde / gelatin nano-filler not only can relieve phase separation, but also can promote synergistic energy dissipation through hydrogen bond reconstruction under the action of stress. According to the design, the inherent flexibility of the hydrogel is reserved, meanwhile, the electromechanical response capacity of the hydrogel is greatly improved, and the obtained hydrogel material has the dual functions of structural supporting and active sensing media and can be seamlessly integrated with biological tissue without sacrificing the fidelity of interface signals.

The invention belongs to the technical field of metal surface chemical treatment, and particularly relates to a metal surface wear-resistant and corrosion-resistant treatment method and application thereof. The wear-resistant and corrosion-resistant treatment method for the metal surface comprises the following steps: carrying out oil and grease removal pretreatment on the metal surface; preparing a solid catalytic high-pressure nitriding agent; and the metal is placed in a closed vacuum environment, and a solid catalytic high-pressure nitriding agent is injected for nitriding treatment. According to the invention, an in-situ solid-phase reaction is adopted, and the solid catalytic high-pressure nitriding agent with high activity is prepared through the aperture confinement effect of an alumina molecular sieve carrier; sodium chloride is used as a permeating agent dispersing agent, has a space confinement effect, prevents the generated nano oxide to promote the growth of the permeating agent and can keep high catalytic activity, and solid octa-amminestrontium chloride is used as an ammonia-rich nitrogen source, so that the gas generation amount is large at low temperature; the alumina molecular sieve carrier and sodium chloride can be repeatedly used, and cost is reduced. The nitriding agent is applied to wear-resistant and corrosion-resistant treatment of the inner cavity surface of a sea water pump, and the nitriding rate is increased by 50% or above under high-pressure low-temperature nitriding.

Methods, systems, and apparatus, including computer programs encoded on a storage device, for determining characteristics of particles are disclosed. A system includes a conveyor belt, wherein a first section of the conveyor belt comprises one or more mechanisms arranged to create environmental conditions favorable to sensor reading. The system includes a sensor rig located proximate to the first section of the conveyor belt comprising a plurality of different types of sensors. The system includes a controller configured to: obtain measurement data from the plurality of different types of sensors; apply the measurement data to a machine learning model configured to determine surface chemical characteristics of particles given measurement data; and output the surface chemical characteristics of particles from the machine learning model to one or more components along the conveyor belt.

The invention discloses an asymmetric magnetic mesoporous carbon superstructure material as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) preparing Fe3O4amp; a SiO2 alcohol dispersion liquid; (2) preparing Fe3O4 < 4 > amp; the preparation method comprises the following steps: preparing a SiO2 (at) micro single micelle superstructure alcohol solution; (3) preparing Fe3O4 < 4 > amp; a SiO2 (at) C superstructure material; the specific surface area of the material is 87-116 m < 2 > / g, the aperture is 22.8-50 nm, and the length is 330-400 nm. The material is applied to catalytic degradation of organic dyes. The method has the beneficial effects that the surface chemical property is more active, the hydrophilicity and the catalytic degradation capability are stronger, the method is suitable for chemical catalytic degradation, the whole synthesis process is simple and convenient to operate, and intermediate byproducts cannot be generated to cause secondary pollution; in addition, in the dopamine carbonization process, high-temperature carbonization is carried out in nitrogen (inert atmosphere), and the operation is safe; by adjusting the type of the PS-PVP-PEO single micelle, accurate control of the mesoporous size can be realized, so that the PS-PVP-PEO single micelle is suitable for catalytic degradation of organic pollutants with different molecular weights, and selective catalytic degradation is realized.

The invention discloses a production process of activated carbon with efficient adsorption performance, and belongs to the technical field of porous carbon material preparation. The preparation method comprises the following steps: by taking biomass as a raw material, compounding the biomass with a eutectic salt system consisting of zinc chloride and potassium chloride, a nitrogen source precursor and a sacrificial cation source to obtain a homogeneous reaction precursor; the key point is that the precursor is subjected to programmed variable-pressure pyrolysis treatment under the condition that the temperature is far lower than the traditional activation temperature. According to the process, deep infiltration of molten salt is achieved through initial pressurization operation, and then reaction gas is guided to escape orderly through a later programmed pressure reduction process. Through collaborative innovation of the composition and the process, multiple steps of carbonization, activation, pore forming, in-situ functionalization and the like are integrated in a single low-temperature reaction unit, and the technical problems that a traditional method is high in energy consumption and long in flow, and the physical structure and surface chemistry of a material are difficult to synchronously regulate and control are solved.

The embodiment of the invention provides a catalyst activity analysis method and system based on material surface physical and chemical indexes, and relates to the technical field of water treatment. According to the method, a sample data set can be obtained firstly, after the sample data set is divided into a training set and a test set, the training set is used for training a plurality of alternative models, and then a prediction model is selected from the alternative models. And inputting data of a catalyst to be detected into the prediction model to obtain a predicted degradation rate output by the prediction model. Wherein the sample data set comprises surface physical property parameters such as pore depth gray difference of the catalyst and surface chemical property parameters such as functional group peak height ratio. According to the method, alternative model training can be carried out through Bayesian optimization, a prediction model is selected by combining evaluation indexes obtained by calculation of a test set, and a machine learning process can be enhanced by utilizing multi-mode fusion data in an environment of small sample machine learning data volume, so that the prediction precision and generalization ability of catalyst activity analysis are improved.

The invention relates to the technical field of silica powder surface modification, in particular to a novel silica powder surface modification method and application of a composite material of the novel silica powder surface modification method. Silica powder surface modification comprises the steps that silica powder is subjected to surface chemical modification through a titanate coupling agent, active functional groups are introduced, and the interface bonding force between the silica powder and MXene is enhanced; high-quality preparation of MXene: etching an MAX phase by adopting hydrofluoric acid (HF) or lithium fluoride / hydrochloric acid (LiF / HCl), and obtaining few layers of MXene nanosheets through ultrasonic stripping to ensure high conductivity and large specific surface area; the modified silica powder and MXene dispersion liquid are uniformly mixed, MXene stacking is inhibited, the specific surface area is increased, and the ion transmission efficiency is improved; mXene nanosheets grow on the surface of the silica powder in situ to form a core-shell structure, so that the interface bonding strength and the mechanical property are enhanced; the composite material is applied to the fields of electromagnetic shielding, energy storage, flexible electronics and the like.

The invention relates to the technical field of environmental waste treatment, and discloses a preparation method of modified household garbage incineration fly ash, the modified household garbage incineration fly ash comprises the following components by mass: 90-99 parts of a fly ash matrix; 0.1 to 2 parts of a plasma activation layer; 0.5 to 8 parts of a silicon oxide coating layer; the preparation method comprises the following steps: pretreating the fly ash; performing plasma activation; preparing a mineralizing solution; performing biomimetic mineralization; and calcining at low temperature. The plasma activation layer is introduced, the silicon oxide coating layer is constructed, and the phosphorus oxide or the boron oxide is cooperatively introduced, so that the microstructure and the surface chemical property of the material are effectively optimized, the specific surface area and the pore volume of the material are increased, and a microporous, mesoporous and macropore synergistic multistage pore channel structure is constructed; the adsorption capacity and the adsorption rate of various waste gas pollutants are improved.

The application discloses a preparation method and application of nitrogen-doped oxygen-rich hierarchical porous carbon, and adopts a one-step co-activation method to prepare the nitrogen-doped oxygen-rich hierarchical porous carbon, which is simple in process and low in energy consumption. The structure and surface chemical performance of the prepared nitrogen-doped oxygen-rich hierarchical porous carbon catalyst are easy to control. The prepared TNS-X material has a large specific surface area and a developed pore structure, which is beneficial to exposure of catalytic sites and diffusion of reactants. Through ammonia and water vapor co-activation, efficient doping of nitrogen atoms and oxygen atoms is realized, the number of catalytic sites is increased, and the catalytic activity is improved. The TNS-800 material exhibits high catalytic performance in a peroxymonosulfate (PMS) activation process, and can completely remove organic pollutants such as acetylaminophenol in a short time.

The invention provides a diamond / metal connector and a brazing method thereof based on femtosecond laser modification, and relates to the technical field of material processing and connection.The method for brazing diamond and metal based on femtosecond laser modification comprises the steps that femtosecond laser is adopted to conduct scanning treatment on the surface of diamond, so that a graphite layer is formed on the surface of the diamond; performing magnetron sputtering of active elements on the surface of the graphite layer to deposit an active layer; and vacuum heat treatment is conducted at the temperature of 500-800 DEG C, and then the diamond and the metal are brazed. Due to the ultra-short pulse and ultra-high peak power characteristics of the femtosecond laser, non-hot-melting accurate etching of the diamond surface can be achieved, sp3 carbon is induced to be converted into sp2 graphite phase, a nano-graphite transition layer is controllably formed, the surface chemical activity is remarkably improved, the chemical bonding strength of an active element layer and the diamond is remarkably enhanced, and the service life of the diamond is prolonged. And the active element reacts with the nano-graphite layer to generate a continuous active element-C compound, so that strong metallurgical bonding is realized.

The invention discloses a preparation method of a high-strength corrosion-resistant copper alloy wire. The preparation method comprises the following steps: (1) preparing composite powder; (2) preparing pretreatment powder; (3) sensitization treatment and activation are carried out, surface chemical copper plating is carried out on the activated powder, and copper plating powder is obtained; (4) weighing copper powder, nickel powder, silicon powder and copper-plated powder, heating and melting, adding the copper-plated powder into the melt, casting and molding, heating to eliminate stress, cooling, and drawing into a copper alloy wire by using a wire drawing machine; and the copper alloy wire is subjected to heat preservation for 30 min at the temperature of 220 DEG C, then the temperature is increased to 300 DEG C, heat preservation aging is conducted for 3 h, furnace cooling is conducted to 200 DEG C or below after heat preservation is completed, then the copper alloy wire is taken out and subjected to air cooling to the normal temperature, and the high-strength corrosion-resistant copper alloy wire is obtained. The copper alloy casting prepared through the method has high tensile strength, and the prepared copper alloy wire is high in self-corrosion potential and shows good strength and corrosion resistance.

The invention belongs to the technical field of aluminum electrolysis inert anode materials, and particularly relates to a surface target-free activation process and a surface chemical plating process of ferronickel spinel powder. The surface target-free activation process of the ferronickel spinel powder comprises the following steps: carrying out reaction on NiFe2O4 powder, nickel salt and hydroxide in a solvent to form a colloidal solution, carrying out solid-liquid separation, and drying to obtain Ni (OH) 2-coated NiFe2O4 powder; and calcining the obtained Ni (OH) 2-coated NiFe2O4 powder to obtain NiO-coated NiFe2O4 powder, and then carrying out a reduction reaction to obtain NiFe2O4 particles with nano Ni particles distributed on the surfaces of the NiO-coated NiFe2O4 powder. Nanoscale active Ni particles are formed on the surfaces of NiFe2O4 particles through a chemical bath precipitation method, calcination and reduction, replace palladium to become a surface activation center and are uniformly distributed, and a continuous and complete metal coating can be formed on the surface of powder during chemical plating.

The application provides a solid super-smooth surface and a construction method and application thereof, and relates to the technical field of marine antifouling. The solid super-smooth surface constructed by the application is composed of linear polyfluorosiloxane, the linear polyfluorosiloxane is combined with a substrate through a chemical covalent bond, the chemical covalent bond is firm, the problem that traditional biomimetic super-smooth surface lubricating oil is prone to loss in an underwater environment is solved, and the solid super-smooth surface has a longer performance of preventing and treating biological fouling. The solid super-smooth surface provided by the application has a linear structure and reliable underwater transparency, and the underwater visible light transmittance of the material can reach more than 95%.

The invention relates to the technical field of lithium ion battery materials, discloses a preparation process and application of a nano silicon-carbon composite graphite material, and provides a preparation process for solving the problem: carrying out oxidation and surface chemical modification on silicon particles to construct a stable chemical bonding interface to resist mechanical stress; on the basis of primary carbon coating, graphene and carbon nanotubes are introduced to construct a multi-stage conductive carbon network with point, line and surface combination, so that efficient and stable electron transmission is ensured; a uniform inorganic protective coating is accurately coated on the surface of the composite material through in-situ chemical reaction so as to shield chemical side reaction. The material prepared by the invention shows excellent performance: the powder conductivity of the material reaches up to 21.5 S / cm, which is far beyond that of a conventional conductive agent scheme; the coulombic efficiency is improved to 92.3% for the first time; and after 500 cycles at the multiplying power of 0.5 C, the capacity retention ratio still reaches up to 85.3%, and the comprehensive electrochemical performance of the material is improved.

The present invention discloses a preparation method of modified white corundum powder and its application in ceramic shell surface materials, belonging to the technical field of precision casting auxiliary materials. The present invention first performs surface modification and structural modification on white corundum powder to obtain modified white corundum powder with low reactivity, and uses it as the main raw material for ceramic shell surface materials. By adding pre-sintered composite oxides and metal oxide powders containing trace elements in the alloy components to the modified white corundum powder, the wetting angle of the alloy on the shell surface is greatly improved, and the chemical reaction rate and ion migration probability between the alloy and the shell surface are reduced, thereby achieving the purpose of reducing sand adhesion on the surface of cast alloy blades. The raw material modification method disclosed in the present invention, as well as the multi-angle and all-round shell surface material formula, can effectively reduce the probability of chemical reactions on the blade surface, improve the qualified rate of blade casting, and provide a feasible solution to the problem of surface chemical sand adhesion during blade casting.

The present application relates to the technical field of marine antifouling, and provides a solid-state super-smooth surface, and a construction method therefor and the use thereof. The chemical composition of the solid-state super-smooth surface constructed in the present application is a linear polyfluorosiloxane, which bonds with substrates by means of chemical covalent bonds. By means of firm bonding via chemical covalent bonds, the problem of a traditional biomimetic lubricating oil for super-smooth surfaces being easily washed away in underwater environments is solved, and longer lasting biofouling control performance can be achieved. The solid-state super-smooth surface provided by the present application is of a linear structure and has reliable underwater transparency, the underwater visible-light transmittance of the material being up to 95% or higher.

The invention belongs to the technical field of materials, and particularly relates to a GaO-coated Mo2C MXene surface chemical adsorption type heterojunction composite material and a preparation method and application thereof. The preparation method comprises the following steps: (1) adding Mo2Ga2C powder into an NH4Cl solution, uniformly mixing, and transferring to a reaction container; (2) hydrothermal reaction; the temperature of the hydrothermal reaction is 200 to 220 DEG C; and (3) after the hydrothermal reaction is finished, carrying out solid-liquid separation, washing and drying to obtain the GaO (at) Mo2C MXene surface chemical adsorption type heterojunction composite material. According to the preparation method disclosed by the invention, synchronous preparation and stable chemical adsorption combination of GaO zero-dimensional particles and Mo2C MXene can be realized; according to the preparation method disclosed by the invention, the preparation process is remarkably simplified, the preparation period is shortened, the production cost is reduced, and the lithium storage performance of the heterojunction is favorably improved.

Methods disclosed herein relate to generating silk nanoparticles with a low polydispersity index (PDI). Methods include adding a silk solution dropwise into a volatile solvent that is miscible with water, thereby forming a precipitate-bearing solution and applying shear forces to the precipitate-bearing solution for a length of time sufficient to achieve evaporation of at least 95% of the volatile solvent, thereby producing a population of silk fibroin nanoparticles in water having a polydispersity index (PDI) of 0.35 or less, including but not limited to, a PDI of 0.330 or less, 0.325 or less, 0.315 or less, 0.310 or less, 0.30 or less, 0.275 or less, 0.250 or less, 0.225 or less, or 0.200 or less. Parameters related to silk fibroin molecular weight, silk fibroin concentration, shear force application, and temperature may all be modified to achieve silk nanoparticles of a particular size exhibiting particular PDIs.

The application discloses a kind of high-performance tin copper composite conductive paste and preparation method thereof, belong to electronic material technical field.The conductive paste is by tin copper composite powder 60-85%, tin alloy powder 3-12%, organic carrier 10-25%, functional additive 1-5% by mass percentage;Wherein the tin copper composite powder is the surface chemical tin copper powder of three-stage particle size gradient compounding, the tin alloy powder is the gradient melting point alloy powder that Sn58Bi, Sn3.5Ag, Sn0.7Cu are proportionally compounded.The application is synergistically designed by multistage particle size powder and gradient melting alloy, and dense metallurgical bonding conductive network can be formed at low temperature, and the core pain points of existing copper-based conductive paste, such as easy oxidation, high sintering temperature, insufficient conductivity, poor printing stability, are solved.The prepared paste has high conductivity, excellent oxidation resistance, low sintering temperature, good printing suitability and strong adhesion, and can be widely applied in integrated circuit packaging, flexible electronics, solar cells and other fields.

The invention relates to the technical field of ground maintenance, and discloses a stadium ground rapid repairing method, which comprises the steps of in-vivo damage diagnosis and microenvironment analysis, and obtaining a three-dimensional physical damage model and a surface chemical microenvironment model of a to-be-repaired area; dynamically generating a customized repair material formula based on the model; executing self-calibration droplet jetting and photopolymerization dynamics regulation and control repair; and carrying out in-situ multi-modal quality verification after repairing. Wherein in the repairing execution step, closed-loop self-calibration of material components is achieved through spectrum verification in the process, and photopolymerization dynamics is regulated and controlled in a self-adaptive mode according to a surface chemical microenvironment model so as to overcome the field inhibition effect. The invention also provides a system for executing the process. According to the invention, the dynamic adjustment of the repair strategy and the whole-process closed-loop quality control can be realized according to the specific condition of the damage point, and the reliability, consistency and efficiency of the repair are obviously improved.

According to the dynamic environment regulation and control detection device and method for the urban external nitrogen oxide absorption coating, the absorption effect of the coating on nitrogen oxide in the environment is systematically analyzed through multi-dimensional dynamic environment simulation and surface chemical in-situ analysis. According to the invention, a spectrum-pollutant-mechanical stress synergistic effect dynamic simulation system is constructed, and a spectrum-adjustable LED array, a NOx pulse injection module and a temperature and humidity-wind speed composite cavity are adopted, so that coupling simulation of dynamic adjustment of ultraviolet intensity, pollutant pulse input and rapid switching of temperature and humidity is realized; a surface adsorption state real-time monitoring technology is innovatively introduced, the characteristic peak intensity ratio of nitrate to nitrite is analyzed through a micro FTIR probe, and a coating layer micropore blockage early warning mechanism is established.

In one or more embodiments, this application relates to tribotechnical additive and lubricant compositions based on self-assembled carbon nanoarchitectonics derived through nanoscale modifications of organosilane-functionalized nanocarbon with one or multiple combinations of organo-molybdenum, organo-boron, organo-sulfur, organo-phosphorus, and heterocyclic compounds. The novel lubricant is characterized by having a composition comprising (A) one or more types of the novel additive compositions, (B) Base oil / / lubricant, and optionally (C) one or more additives selected from the group including antioxidants, dispersants, detergents, anti-wear additives, extreme pressure additives, friction modifiers, viscosity index modifiers, seal swell additives, defoamers, pour point depressants and corrosion / rust inhibitors. The selfassembled carbon nanoarchitectonics is expected to enhance the surface chemistry, antiwear, antifriction, antioxidancy, electrothermal, and corrosion inhibiting characteristics of the tribotechnical compositions for formulating high-quality solutions in a wide range of applications.

An exemplary flow cell includes a patterned substrate having an active area and a bonding area at least partially surrounding the active area. The active area includes a first recess defined in a layer of the patterned substrate, a surface chemical positioned in the first recess, and a first gap area surrounding the first recess. The bonding area includes a second recess defined in the layer and a second gap area surrounding the second recess. An adhesive is positioned over the second recess and over the second gap area. A cover is attached to the adhesive such that a flow channel is defined between a portion of the cover and the active area.

The present invention belongs to the field of degradation of aromatic hydrocarbon organic matter in saline-alkali environments, and relates to a preparation method and application of sulfide nano-zero-valent iron-doped biochar. The method includes the selection of a carbon-based material modifier, the preparation of a surface chemically modified carbon-based material, and the degradation process of a target pollutant. The preparation steps of the modified carbon-based material are as follows: first, (1) preparing biochar by carbonizing lotus leaf stems and facility agricultural crop straw at high temperature; (2) preparing sulfide nano-zero-valent iron particles by a modified borohydride reduction method under inert atmosphere conditions; and (3) preparing sulfide nano-zero-valent iron-doped biochar particles. The sulfide nano-zero-valent iron-doped biochar particles are subjected to solid-liquid separation, vacuum drying, and high-temperature calcination under a reducing atmosphere to obtain metal-modified biochar nanoparticles. The above-mentioned material is used to activate persulfate to degrade aromatic hydrocarbon organic matter, degrading the target PAHs to generate non-condensed ring organic small molecule compounds. The operation is simple, the strengthening effect is significant, the degradation effect is obvious, and the material is salt-alkali resistant.

The invention discloses a method for realizing the super-hydrophobicity of a magnesium alloy, and relates to a method for realizing the super-hydrophobicity of the magnesium alloy. The invention aims to solve the problems that the water resistance, the pollution resistance and the self-cleaning performance of the surface of the existing magnesium alloy are poorer, the service life of a metal base material is short, and the application of the metal base material is limited. The method comprises: 1, magnesium alloy pretreatment; 2, ultrasonic oil removal; 3, etching a micro-arc oxidation part; 4, preparing a super-hydrophobic solution; and 5, preparing the super-hydrophobic coating. The super-hydrophobic performance of the magnesium alloy is achieved, the super-hydrophobic film layer can construct an efficient corrosion protection system by cooperatively regulating and controlling interface wettability and surface chemical characteristics, the contact angle is larger than 150 degrees, the sliding angle is smaller than 10 degrees, excellent waterproofness and self-cleaning capacity are shown, water drops and dirt are prone to slipping off from the surface, the long-term cleaning effect is kept, and the corrosion resistance of the magnesium alloy is improved. Particularly, the method has important application value in the fields of automobiles, aviation, electronic products and the like.

The invention discloses an efficient and low-cost machining method for a precise slender pipe. The main technological process comprises the steps of blanking, thermal refining, correction, turning and drilling of a deep hole clamping connector, drilling of a deep hole, rough turning of an outer circle, deoiling, electrolysis of the deep hole, cleaning, chemical copper plating of the surface of an inner hole, cold burnishing of the inner hole, copper removal, stress relief annealing, abrasive particle fluid polishing and the like. By adopting the technical routes of drilling, electrolytic polishing, cold burnishing of an inner hole, high-temperature stress relief annealing and abrasive flow polishing of the inner hole, precise, efficient and low-cost machining of the slender pipe is realized by completely localizing universal technical equipment, the size precision of the inner hole reaches IT8 level, the surface roughness Ra value reaches within 0.2 mu m, and the engineering application value is remarkable.

The invention discloses nanometer graphene oxide and a preparation method thereof. The transverse size of the nanometer graphene oxide is 10-100 nm, and the thickness of the nanometer graphene oxide is 1-2.5 nm. The surface chemical structure meets the following conditions: a C1s peak is analyzed on the basis of X-ray photoelectron spectroscopy, the sum of the atomic percent content of hydroxyl and epoxy groups is not higher than 15%, and the atomic percent content of carboxyl is not lower than 6%. According to the structural design, the structural defect caused by excessive oxidation or reduction in a traditional method is avoided, and the chemical stability and the functionalization potential of the material are improved.

The invention discloses a laser crystal bonding method based on excimer laser surface activation, and belongs to the technical field of laser crystal surface modification and bonding. The activation method comprises the following steps: carrying out precise polishing and cleaning treatment on the surface of a laser crystal to be bonded; and carrying out irradiation activation treatment on the treated crystal surface by adopting excimer laser. The bonding method comprises the following steps of: activating the surfaces of the crystals by adopting the activating method, and laminating the surfaces of the two crystals subjected to activating treatment at room temperature to form an initial optical cement interface; and carrying out heat treatment annealing on the crystal assembly subjected to optical cement. High-energy ultraviolet photons of short-wavelength excimer laser are utilized to initiate surface chemical bond breakage, high-activity sites such as dangling bonds are formed, and the surface energy and the surface activity of the crystal are remarkably improved. The method does not need to introduce a chemical reagent, is small in heat influence, remarkably improves the bonding strength after activation, and is suitable for large-size crystal treatment.

The application discloses a preparation method of 3,4-dihydroxybenzaldehyde / gelatin carbon nano-material based adhesive hydrogel and belongs to the technical field of hydrogel. The application adopts 3,4-dihydroxybenzaldehyde and gelatin as carbon sources, the synthesized nano filler has amphiphilic surface characteristics, can promote the uniform dispersion of the nano filler in the hydrogel network, simultaneously utilizes the multivalent interface interaction to establish a mechanically solid and deformable nano composite structure, and the surface chemical properties of the 3,4-dihydroxybenzaldehyde / gelatin nano filler can not only relieve phase separation, but also promote synergistic energy dissipation through hydrogen bond reconstruction under stress. The design retains the inherent flexibility of the hydrogel, simultaneously greatly improves the electromechanical response capacity of the hydrogel, the obtained hydrogel material has the dual functions of structural support and active sensing medium, can be seamlessly integrated with biological tissues, and does not sacrifice the fidelity of the interface signal.

An electrochemical biosensor chip for the simultaneous quantitative detection of a plurality of different target molecules in a biological fluid, wherein the biosensor chip comprises: a) a substrate with a microfluidic structure designed to guide the biological fluid, b) a plurality of electrochemically isolated detection modules arranged along the microfluidic structure, c) wherein each detection module is structurally assigned to a specific target molecule and differs from the other detection modules by at least one irreversible structural feature selected from: -Electrode geometry, -Electrode surface, -Surface chemistry, - or a combination thereof, d) wherein each detection module comprises a working electrode, a counter electrode and a reference electrode, e) wherein each detection module is linked to a fixed electrochemical redox system which defines a module-specific electrochemical operating window, f) wherein the electrochemical operating windows of the detection modules do not overlap, (g) and wherein the biosensor chip comprises at least one non-functionalized internal reference electrode configured for hardware-based signal normalization, independent of the chemical identity of the target molecules.