376 results about "Silver ion" patented technology

The invention relates to a metallized microbubble and a preparation method thereof, a construction method of a multifunctional composite probe, and a rapid bacterium capturing and sterilizing method, and belongs to the technical field of functional material preparation. The method aims at solving the technical problems that in the prior art, a metal coating on the surface of the hollow glass microbubble is not uniform, combination is not firm, and stability is poor. According to the technical scheme, the method is characterized by comprising the following steps: mixing surface-activated hollow glass microbubbles with a polyethyleneimine solution for reaction, and washing and drying to obtain polyethyleneimine-coated hollow glass microbubbles; then reacting with a single-stranded DNA buffer solution to obtain an intermediate product loaded with DNA; then introducing a silver nitrate solution to load silver ions on the surface of the compound; and finally, reducing through a sodium borohydride solution to prepare the metallized microbubbles. The metalized microbubbles prepared by the method can be used for constructing a multifunctional composite probe to realize efficient capture and synergistic antibiosis of targets such as bacteria.

The present invention discloses a tellurium-lead-lithium oxide glass powder for BC cell N-region conductive paste and its preparation method, belonging to the field of photovoltaic silver paste. The glass powder adopts components with high Pb, Te, and Li: aTeO2 - bPbO - cLi2O - dBi2O3 - eWO3 - fZnO - gSiO2 - hNa2O; where a + b + c + d + e + f + g + h = 1, 0.2 < a < 0.4, 0.1 < b < 0.4, 0.1 < c < 0.25, 0 < d < 0.1, 0 < e < 0.1, 0 < f < 0.1, 0 < g < 0.1, 0 < h < 0.05, and a + b > 0.5, and the ratio of c to h is (3 - 10):1. By controlling the specific Pb, Te, and Li contents and the specific Li / Na ratio in the present invention, a strong corrosion effect on the poly layer of the cell is achieved, enabling more silver ions dissolved in the glass liquid to recrystallize on the surface of the silicon wafer, thereby achieving good ohmic contact.

The invention provides application of a silver modified AFX molecular sieve in xenon and krypton gas separation, and belongs to the technical field of gas separation. According to the invention, silver ions with electronegativity are introduced into AFX molecular sieve pores through ion exchange, selective adsorption of xenon is realized through the AFX topological molecular sieve subjected to Ag exchange so as to enrich xenon, and excellent separation of xenon and krypton is finally realized. The xenon and krypton adsorption isotherm of the silver modified AFX molecular sieve under the condition of 25 DEG C is tested, and the IAST (ideal adsorption solution theoretical value) of the molecular sieve is analyzed to be 36.5 through a static adsorption curve; according to the method disclosed by the invention, a dynamic penetration test is carried out under trace Xe and Kr concentrations by simulating the waste gas subjected to UNF post-treatment, and the dynamic capacity of Xe is calculated to be 104 mmol kg <-1 >, which is superior to that of other reported materials.

The application discloses a kind of high-conductivity MXene-based electromagnetic shielding composite films and preparation method thereof, belong to new material technical field.The preparation method includes the following steps: using in-situ HF etching method to prepare MXene dispersion liquid;With deionized water as solvent, silver nitrate solution is prepared by dissolving silver nitrate;The silver nitrate aqueous solution is added to MXene dispersion liquid, and Ag@MXene film is obtained by vacuum filtration method.The method uses silver ion in silver nitrate as oxidant to make it and titanium element in MXene occur redox reaction to generate silver particles, so as to prop up MXene sheet layer and reduce the resistance caused by adhesion between sheet layers and increase the conductive path in MXene, so as to increase the conductivity of MXene;The composite film not only has excellent conductivity, electromagnetic shielding performance and is easy to form processing;The conductivity of the composite film can reach 3120S / cm, and the electromagnetic shielding performance can reach 68.5dB.

The invention relates to the technical field of composite metal materials, in particular to a silver-coated graphene copper composite material and a preparation method thereof, and aims at solving the problems that traditional silver-coated copper powder is high in silver consumption, copper is oxidized due to the fact that a silver layer is prone to being damaged, and conductivity is insufficient. The method comprises the steps that a graphene coating layer is formed on a copper powder substrate in situ through chemical vapor deposition, and graphene copper powder is obtained; performing etching treatment on the graphene copper powder to controllably expose part of the copper substrate so as to form anchoring points for silver ion deposition; carrying out reduction treatment on the etched graphene copper powder so as to ensure that an anchoring site has chemical activity; in a reductive liquid phase environment, enabling a chemical silver plating solution to react with the graphene copper powder subjected to reduction treatment, and guiding silver ion deposition by utilizing an anchoring point, so as to form a silver coating layer on the surface of the graphene coating layer; and separating and drying the reacted system to obtain the silver-coated graphene copper composite material. The material is better in oxidation resistance and conductivity, and the process is free of waste liquid.

The invention discloses a pH / temperature dual-response type quaternary ammonium salt-nano silver-zinc oxide composite antibacterial coating material as well as a preparation method and application thereof, and belongs to the technical field of antibacterial materials. The antibacterial effective life of the coated product is at least up to 5 years. The coating product is preferably a gastrointestinal endoscope, efficient bacteriostasis is achieved under the condition that the light transmittance of the gastrointestinal endoscope is not affected, biocompatibility is good, safety is high, precise controlled release of silver ions is achieved, and biotoxicity caused by sudden release of the silver ions is avoided. The quaternary ammonium salt-nano silver-zinc oxide composite coating material with the pH / temperature dual-response antibacterial effect is finally obtained through the steps of preparing a composite carrier material, loading antibacterial metal elements, constructing a pH / temperature dual-response polymer network and the like in sequence. A high-performance, safe and environment-friendly antibacterial coating system which is rapid in sterilization, precise in controlled release and long-acting in interference resistance is constructed, and an antibacterial solution with high technical adaptability is provided for the fields of medical treatment, food, water treatment and the like.

The invention discloses a hydrophobic anti-icing material based on silver ions and application in a power transmission line, and belongs to the technical field of hydrophobic anti-icing materials, the hydrophobic anti-icing material is prepared from the following raw materials in parts by weight: 80-120 parts of hydroxyl-terminated polydimethylsiloxane, 5-15 parts of tetraethoxysilane, 0.5-3 parts of silver nitrate, 3-10 parts of hydrophobic nano silicon dioxide and 1-5 parts of nano titanium dioxide. The invention discloses an anti-icing and deicing composite material, which is prepared from the following components in parts by weight: 80 to 120 parts of butyl acetate, 0.1 to 0.5 part of dibutyltin dilaurate, 0.5 to 2 parts of sodium citrate and 2 to 5 parts of modified fluorinated phosphotungstic acid imidazole compound, and solves the problems that the existing material is insufficient in photo-thermal utilization rate, poor in stability in a severe environment, insufficient in hydrophobic capacity and difficult to give consideration to anti-icing and deicing effects. According to the scheme, the modified fluorinated phosphotungstic acid imidazole compound and silver ions are introduced to form a synergistic effect, formation of an ice layer is inhibited, melting of the ice layer is promoted, meanwhile, lasting super-hydrophobicity is provided, a durable hydrophobic anti-icing coating based on the silver ions is formed, and the safety of a power grid is guaranteed.

The invention relates to the technical field of immunochromatography analysis, and discloses a signal enhancer of a colloidal gold immunochromatography rapid detection card and a preparation method thereof, the signal enhancer comprises a silver ion solution, a thiourea-ascorbic acid synergistic reducing agent, a pH buffer system and a surfactant stabilizing system, the signal amplification is realized by catalyzing and depositing silver nanoparticles on the surface of colloidal gold, the operation is simple and convenient, one-time addition is realized, and the reaction is completed within 5-10 minutes; the sensitivity is improved by 5-10 times, and the specificity is higher than 98%; the stability is excellent, and the storage time is 12 months at 4 DEG C; various colloidal gold rapid detection cards are universally compatible; compared with the prior art, the colloidal gold immunochromatography rapid detection card has the advantages that the cost is controllable, the single detection is increased by 0.3-0.5 yuan, and the colloidal gold immunochromatography rapid detection card is particularly suitable for ultra-sensitive detection of small molecular substances in the field of food safety, for example, the detection limit of malachite green reaches 0.1 microgram per liter, the detection limit of fipronil reaches 0.5 microgram per liter, and the application range of the colloidal gold immunochromatography rapid detection card is obviously expanded.

The invention provides a preparation method of silver-coated copper powder, and belongs to the technical field of conductive silver paste. The method comprises the following steps: S1, preparing a base solution containing copper powder: uniformly mixing the copper powder, a complexing agent and water to obtain the base solution; s2, a copper powder oxide layer is removed, specifically, the base solution is stirred, and the copper powder oxide layer is removed in the process of stirring the base solution; s3, silver-coated copper powder is prepared, specifically, a silver salt aqueous solution is added into the base solution, and stirring continues; after the reaction is finished, washing and drying to obtain silver-coated copper powder; the mass of silver ions in the silver salt aqueous solution is 1%-90% of the mass of the copper powder. According to the method, operation is simpler, coating is more uniform, the prepared silver-coated copper powder is lower in resistivity, the independent copper powder deoxidation step and the subsequent copper powder separation and washing step can be omitted, the copper powder deoxidation process is fused into the material mixing process, and the copper powder is prevented from being oxidized again in the separation and washing steps.

The invention relates to the technical field of biomedical materials, in particular to silver-containing collagen sponge and a preparation method thereof.The preparation method comprises the following steps that S1, silver salt is added into a collagen solution, and a first solution is obtained; s2, glutathione and ethylene diamine tetraacetic acid disodium salt are added into the first solution, and a second solution is obtained; s3, adding sodium alginate and chitosan into the second solution, and homogenizing to obtain a homogenized solution; and S4, carrying out freeze drying on the homogenized liquid to obtain the silver-containing collagen sponge. The preparation method of the silver-containing collagen sponge provided by the invention is simple in process, good in reproducibility and suitable for large-scale production; according to the silver-containing collagen sponge, chelating is stably combined with a microcapsule coating composite system, oxygen is isolated from silver ions, the oxidation rate of the silver ions is remarkably reduced, meanwhile, slow release of silver is achieved, and therefore the antibacterial time efficiency of the silver-containing collagen sponge can be prolonged.

The invention discloses a multi-stage leaching purification method of a targeted therapeutic drug. The multi-stage leaching purification method comprises the following steps: sequentially filling an adsorption column with a porous organic polymer layer and an adsorption ball layer; controlling the flow rate of the leacheate and the column temperature for leaching, and setting an adsorption saturation threshold value; carrier gas is adopted to heat and desorb the porous polymer layer, and carrier gas components are switched to heat and desorb the adsorption ball layer; the method comprises the following steps: introducing carrier gas carrying iodine vapor into an alkaline absorption tower to treat waste gas, eluting impurities of adsorption balls by adopting an acidic mixed solution, and performing catalytic degradation by combining ultraviolet light; a chelating agent solution is used for regenerating adsorption balls, a silver salt solution is used for heavily loading silver ions, an organic solvent is used for eluting and regenerating a porous polymer, regular calibration and part replacement are conducted on a system, and organic pollutants and radionuclides in a matrix are difficult to treat synchronously through a traditional single-layer adsorption material; according to the leaching purification method, the generation amount of radioactive waste liquid is remarkably reduced, and meanwhile the shielding protection requirement of the follow-up purification step is reduced.

The invention relates to the technical field of graded screening, in particular to a graded screening system based on staggered stacked metal ring films and a preparation method and application. An organic ligand and two metal complexes are subjected to interface coordination assembly under the action of silver ions, an ordered staggered stacked metal ring film is constructed, the structure and performance of the metal ring film are precisely regulated and controlled, the metal ring film has a definite molecular sieve component difference, and then precise grading screening of different molecules is achieved. The film has an obvious lattice structure, has good crystalline orderliness, and can ensure the stability and reliability of the screening process. The graded screening system based on the staggered stacked metal ring membranes has excellent interception performance on target molecules, and effective separation of TAC from glucan and leucine can be achieved. The two-stage membrane classification screening strategy can also be popularized to separation and purification of other substances, and good universality and industrial application prospects are achieved.

The invention belongs to the technical field of antibacterial materials, and particularly relates to a sericin / tannic acid-silver antibacterial-anti-biofilm nanocomposite as well as a preparation method and application thereof. According to the method, the TA-Ag nano material is prepared by adopting a simple water bath method; and then, dispersing SS in a TA-Ag aqueous solution to realize hydrogen bond combination of SS and TA so as to obtain the SS / TA-Ag nanocomposite with a stable structure. In the preparation process, plant polyphenol tannic acid is taken as a carrier, silver ions and tannic acid are combined by adopting a water bath method, and the antibacterial property of tannic acid is effectively improved; and the sericin is further modified through hydrogen bond crosslinking, so that the obtained composite material not only has antibacterial and anti-biofilm dual functions, but also is simple in preparation process and mild in reaction condition, and conforms to green chemistry and environment-friendly concepts.

This invention discloses a method for recycling and reusing cyanide silver plating wastewater. The method includes four steps: separation of silver ions and cyanide, concentration of the silver-containing solution, cyanide concentration, electrolysis and residual liquid recycling, and reuse of reclaimed water. This method achieves the separate recycling and reuse of silver, cyanide, and water. The silver-containing solution is electrolyzed to obtain metallic silver, the cyanide concentrate's main component is sodium cyanide or potassium cyanide solution, and the reclaimed water with a conductivity below 20 μS / cm is reused in the production line. This method not only maximizes resource utilization and reduces wastewater discharge, but also separates most of the cyanide from the silver-containing solution during electrolysis, making the electrolysis process safer. Furthermore, the residual liquid after electrolysis can be recycled multiple times for the separation and concentration of silver ions and cyanide.

This invention relates to the field of semiconductor technology, providing a Si VDMOS device and electronic device. The Si VDMOS device includes a Si VDMOS chip, which comprises a drain electrode, a substrate, and an epitaxial layer connected sequentially from bottom to top. The epitaxial layer contains P-type and N-type doped regions. An insulating dielectric layer and several source electrodes are disposed on the side of the epitaxial layer facing away from the substrate. Several gate electrodes are disposed on the side of the insulating dielectric layer facing away from the epitaxial layer. The source electrodes and gate electrodes form an active region. A metal ring is connected to the insulating dielectric layer, surrounding the active region. The distance between the metal ring and the active region is greater than or equal to 150 μm. The metal ring is connected to a potential structure, the potential of which is equal to the potential of the drain electrode. By employing this structure, silver ion migration can be suppressed at its source.

The invention relates to a hydrocarbon adsorption material in a cold start stage of a diesel vehicle and a preparation method and application of the hydrocarbon adsorption material in the technical field of environmental catalysis and tail gas purification, the adsorption material comprises an active component and a carrier material, the active component is Ag, the carrier material is ZSM-5 zeolite with an MFI topological structure, and the mass fraction of the active component Ag is 2.0 wt%. The carrier ZSM-5 is loaded with Ag species through a two-step ion exchange method, ammonium salt pretreatment and silver ion exchange are included, and after centrifugation, drying and air atmosphere calcination, the high-performance material for hydrocarbon adsorption in the cold start stage of the diesel vehicle is finally prepared. The prepared adsorption material has the advantages of being high in silver species dispersity, large in low-temperature adsorption capacity and good in matching of a high-temperature desorption window and DOC activation temperature, compared with traditional silver modified zeolite, the adsorption capacity is increased by 125.7% and 79.6% respectively, desorption peaks are concentrated and matched in temperature, the HCs rejection rate in the cold start-up stage is larger than or equal to 90%, and the adsorption material has the remarkable application value and is suitable for popularization and application. And upgrading and optimization of a diesel vehicle tail gas purification technology can be promoted.

The invention relates to antibacterial and mildew-proof leather sponge with silver ions, which comprises the following components in parts by weight: 60-80 parts of ethylene vinyl acetate and 1-5 parts of foaming agent. The leather comprises the following components in parts by weight: 40-60 parts of polyester modified MD I, 10-20 parts of a silver ion antibacterial agent, 1-3 parts of a plasticizer, 15-25 parts of a bactericide, 1-2 parts of a mildew preventive, 1-3 parts of sponge glue, 3-5 parts of a cross-linking agent, 0.5-0.6 part of a catalyst, 40-50 parts of a leather body, 1-2 parts of leather softening enzyme and 1-2 parts of a leather adhesive. According to the antibacterial and mildew-proof leather sponge with the silver ions and the preparation method, when sponge leather is prepared, due to the excellent antibacterial performance of the silver ions, the silver ions are in contact reaction with cells, inherent components of bacteria are damaged or functional obstacles are generated, and bacterial death is caused, meanwhile, the leather sponge can be prevented from mildewing in cooperation with the mildew preventive, and the antibacterial and mildew-proof effects are achieved. The leather sponge has the antibacterial and mildew-proof functions, and the use experience of a user is improved.

The invention relates to the technical field of water purification control, and particularly discloses a metal ion generation device state on-line monitoring method and monitoring system, and the method comprises the following steps: obtaining data of a water outlet pipe, a water inlet pipe and a water treatment pipe body, judging whether the concentration value of self-control electrolytic silver ions is in a preset disinfection concentration value domain, and generating an auxiliary control signal; an electrolysis current value is adjusted through a current auxiliary module; acquiring a non-zero time interval of the water outlet flow velocity value in the monitoring time, acquiring a real-time electrolytic silver ion concentration value in the non-zero time interval of the water outlet flow velocity value in real time through a silver ion sensor, and calculating to obtain an electrolytic silver ion concentration state expression value; the water flow is compared with the electrolytic silver ion concentration state expression threshold value, an early warning signal is generated, the electrolytic current is rapidly judged and adjusted based on the water flow, it is guaranteed that the silver ion concentration is stable and qualified in the disinfection and sterilization process, and the disinfection and sterilization stability of the device in the silver ion electrolysis process is guaranteed.

The application discloses a copper electrolysis / electricity deposition device and a working method thereof in the technical field of crude copper electrolytic refining, which comprises a tank body, the tank body comprises a cathode cavity and an anode cavity, the cathode cavity and the anode cavity are arranged side by side and are communicated with each other, an electrolyte input device, the electrolyte input device is arranged in the cathode cavity, and the electrolyte input direction is from the cathode to the anode, an electrolyte output device, the electrolyte output device is arranged in the anode cavity, and the electrolyte output direction is from the anode to the cathode, cathode plates and anode plates can be arranged in the cathode cavity and the anode cavity respectively at intervals, and the cathode plates and the anode plates are connected with an electrolysis power source externally, the cathode cavity and the anode cavity adopt a cathode-anode different-tank structure, the purity of electrolyte in the cathode tank is high during the electrolysis process, the quality of cathode copper can be improved, the problem of short circuit caused by excessive dissolution of the anode plates and falling off of the anode plates during the electrolysis process can be avoided, the residual anode rate can be reduced, and silver ions generated by anode dissolution do not participate in cathode discharge, so that the silver recovery rate can be improved.

The application relates to the technical field of medical dressing preparation, and discloses a hemostatic, healing-promoting and antibacterial foam dressing and a preparation method thereof. The method uses sodium alginate and carboxymethyl chitosan as a composite polysaccharide matrix, mixes the two, adds a calcium chloride solution to crosslink a porous gel support, and then carries out freeze-drying to obtain a porous framework; gelatin and polyvinyl alcohol can be further added to enhance the mechanical strength, zeolite particles loaded with silver ions are added to achieve antibacterial performance, epidermal growth factor release microspheres are added to promote healing, and the dressing can be further subjected to heparinization, plasma surface modification, thrombin addition, salt precipitation pore formation and sterilization treatment. The dressing prepared by the method has the functions of synergistic hemostasis, antibiosis and healing promotion, has good biocompatibility and suitable mechanical strength, and has a simple preparation process, and can be used for various wound care.

The application discloses a silver / schiff base antibacterial material, a preparation method and application, and relates to the field of antibacterial materials.The silver / schiff base antibacterial material, the preparation method and the application are characterized in that, based on the large electron cloud density of the carbon-nitrogen double bond of the schiff base, silver ions in a silver nitrate solution are uniformly adsorbed on a schiff base base through the electrostatic adsorption principle; under the reduction of a reducing agent, the silver ions are reduced to nanosilver ions, and a silver / schiff base antibacterial material is obtained, in which nanosilver ions in the form of nanospheres are uniformly dispersed on the schiff base in the form of a thin sheet layer, thereby greatly improving the dispersibility of the nanosilver ions.The preparation method is simple, low in cost, and capable of batch production, and has no cytotoxicity, and has high antibacterial effects on streptococcus, pseudomonas aeruginosa and staphylococcus aureus, and has a good application prospect.

The present application belongs to the technical field of pharmaceutical preparation, and relates to an electrolytic silver ion solution capable of completely inactivating HIV and a preparation method thereof. The electrolytic silver ion solution uses ultrapure water as a solvent, and contains divalent silver ions, a complexing agent and a complexing agent in the electrolytic silver ion solution. The complexing agent is hexamethylenetetramine capable of forming a stable complex with silver ions and capable of quantitatively analyzing the concentration of silver ions. The hexamethylenetetramine is of an analytical purity grade. The complexing agent is ethylenediamine capable of forming a more stable silver-ammonia complex ion, i.e., diammine silver, and capable of doubling the concentration of the generated silver-ammonia complex ion. The concentration of the divalent silver ions is 200-300 mg.kg ‑1 -1; the highest concentration of the complexing agent is 0.9 g.kg ‑1 -1; and the highest concentration of the complexing agent is 0.55 g.kg ‑1 The complexing agent and the complexing agent of the present application have a small dosage, a high relative ratio of silver ions and a stronger activity, and the inactivation rate of HIV is as high as 99.993%.

An oral care composition is provided and includes a natural flavor extract, a sulfur source such as dimethyl disulfide, a stannous ion source, and a soluble metal ion source that prevents the formation of methyl mercaptan. The natural flavor extract may contain dimethyl disulfide as an impurity. The soluble metal ion source may include a metal salt, a metal oxide, or a combination thereof, and the soluble metal ion source may include a copper ion source, a silver ion source, a zinc ion source, or combinations thereof.

The application relates to a double-metal hydroxide, in particular to application of a CuAl double-metal hydroxide, in particular to application of the CuAl double-metal hydroxide in preparation of a preparation for inactivation of pathogenic bacteria, fungi and viruses. The CuAl double-metal hydroxide is prepared by a formamide liquid phase stripping method. Compared with the prior art, the application solves the problem of high cost of a silver ion loaded layered double-metal hydroxide in the prior art, and realizes preparation of a low-cost, high-performance and green antibacterial material with a bactericidal and antiviral effect.

This invention provides a long-lasting antibacterial spray, its preparation method, and its application. The antibacterial spray comprises a polyphenol adhesion component, metal ions, auxiliary polyphenols, a network stabilizer, and water. The metal ions form a dynamically reversible coordination network with the polyphenol adhesion component; the metal ions include silver ions and zinc ions. In this invention, the silver nanoparticles may undergo surface oxidation or coordination dissociation processes in the polyphenol network environment, thus serving as a potential source of supplementary silver ions, contributing to a smoother ion release behavior and achieving long-lasting antibacterial action through ion-nano synergy. This invention utilizes the synergistic effect of silver and zinc ions to improve the physical stability of the system. By introducing a small amount of silver nanoparticles as "solid-phase nodes" in the polyphenol network, the structural stability and resistance to mechanical damage of the antibacterial system are improved without significantly increasing the total silver release.

The application discloses a circulating water purification treatment process for heat exchange equipment and relates to the technical field of circulating water purification treatment, and comprises the following steps: preparing a polyaspartic acid-silane functionalized graft intermediate; selecting a porous zeolite matrix and performing acid activation treatment; immersing the matrix in sol, standing for defoaming, and performing temperature rising calcination to obtain a nano TiO2-coated zeolite matrix coated with nano titanium dioxide on the surface; immersing the nano TiO2-coated zeolite matrix in a solution, stirring and reacting after adjusting the pH value of the solution to obtain PASP functionalized zeolite filter material; immersing the PASP functionalized zeolite filter material in a silver nitrate solution, performing photocatalytic reduction, reducing and depositing silver ions in situ, and obtaining silver / titanium dioxide-polyaspartic acid synergistic functionalized composite filter material. Through the synergistic composite filter material, efficient scale inhibition and sterilization and rapid purification are realized, excellent stability and durability are exhibited under harsh working conditions such as high temperature and long period, the application is environment-friendly, and the maintenance cost is low.

This application provides a conductive polyimide film and its preparation method, belonging to the field of conductive materials. The method involves preparing a polyamic acid solution, mixing surface-coated rod-shaped silver powder with the polyamic acid solution, and then performing a casting process followed by gradient heating to obtain a polyamic acid film enriched with rod-shaped silver powder at the bottom. The rod-shaped silver powder-rich surface of the obtained polyamic acid film is then subjected to an ion exchange reaction with a silver nitrate solution. The ion-exchange film is then cleaned and subjected to thermal imidization treatment to obtain the conductive polyimide film. This application utilizes the ion exchange reaction and subsequent thermal curing process to reduce silver ions on the film surface, forming a silver-plated layer with excellent adhesion and conductivity. This material exhibits excellent reliability during use; even if the surface silver-plated film partially peels off due to wear, the conductive network built by the rod-shaped silver powder at the bottom can still serve as a backup conductive path, significantly improving its long-term stability in practical applications.

Disclosed are polymer compositions incorporating metal nanoparticles, and medical devices or other products made therefrom. The disclosed polymer compositions can be used to form medical devices, including implantable medical devices, that have effective antimicrobial properties. The disclosed polymer compositions incorporate metal nanoparticles that function without releasing metal (e.g., silver) ions. The polymer compositions may have anti-UV properties conferred by the metal nanoparticles.

An aqueous composition including (a) metal ions including tin ions and silver ions and (b) at least one complexing agent of formula C11RC12-XC11-RC11   (C11)and their salts,whereXC11 is selected from(a) a divalent 5 or 6 membered aromatic N-heterocyclic group;(b) a divalent 6 membered aromatic carbocyclic group; and(c) a divalent 5 or 6 membered aliphatic N-heterocyclic group including one N atom and optionally a second heteroatom selected from N and O; all of which may be unsubstituted or substituted by one or more OH or one or more RC14;RC11 is selected from ; andRC12 is selected from RC11, XC11-RC11, H, OH, NRC142, C1 to C10 alkyl, and C1 to C10 alkoxy

The invention provides a deleading agent FT236 and a preparation method and application thereof, the deleading agent FT236 is prepared by taking cellulose nanocrystals CNC as a matrix, diethylenetriamine pentaacetic acid DTPA as a collecting agent, gamma-mercaptopropyltrimethoxysilane MPTMS as a cross-linking agent and chitosan quaternary ammonium salt HTCC as a flocculating agent through the steps of main reaction and post-treatment. The nano structure of the CNC substrate can uniformly load DTPA and MPTMS to provide a stable framework; a collecting agent DTPA is extremely high in chelating capacity for lead ions and is not combined with silver ions, and loss of precious metal is avoided; mPTMS can strengthen the structural stability of the medicament; the HTCC has flocculation activity and can promote agglomeration of the nanoparticles.