72 results about "Zno nanoparticles" patented technology

The invention relates to the technical field of polypropylene, in particular to an antibacterial modified polypropylene material and a preparation method thereof. The problems of poor antibacterial property and mechanical property of the polypropylene material are solved. According to the invention, the carbon nanotube is used as a carrier, ZnO nanoparticles are grafted on the surface, and the carbon nanotube and the polypropylene resin are subjected to interface synergy and functional complementation, so that the mechanical property and antibacterial activity of the material are synchronously improved; through the short-range-long-range synergistic effect of the short carbon fibers and the glass fibers treated by the silane coupling agent KH550, the fracture resistance of the material is remarkably improved; through the molecular-level synergistic effect of hydroxylated boron nitride nanosheets and maleic anhydride grafted polypropylene, the interfacial compatibility of the nanofiller and a polypropylene matrix is optimized, and the mechanical property of the material is improved; the antibacterial microcapsule is prepared by taking chitosan as a carrier, wrapping hinokitiol and loading nano titanium dioxide, and the material is endowed with long-acting antibacterial performance.

The invention relates to the technical field of radiation refrigeration films, and discloses a porous polyvinylidene fluoride based composite radiation refrigeration film and a preparation method thereof. The method comprises the following steps: firstly, carrying out melt blending on PVDF, NaCl and ZnO nanoparticles and forming a film, then dissolving out NaCl through water washing, and constructing a continuous three-dimensional porous structure in a PVDF matrix; and immersing the obtained porous PVDF / ZnO membrane material into a methanol aqueous solution containing 2-methylimidazole, so that ZnO is subjected to a coordination reaction at the pore wall and is converted into the ZIF-8 nanocrystal in situ. In the thin film prepared by the steps, the micron-sized salt-induced pore structure, the nano-sized ZIF-8 particles and the interface of the ZIF-8 particles jointly form a multi-stage scattering network, so that the scattering ability of the thin film in the solar spectrum range of 0.25-2.5 microns can be remarkably enhanced, the high infrared emission performance of the PVDF matrix in an atmospheric window of 8-13 microns is maintained, and the thin film has high solar reflectivity and high infrared emissivity, and can be used for preparing the solar film. An excellent radiation refrigeration effect can be achieved, and the heat-dissipating material is suitable for being applied to building outer surfaces, equipment heat dissipation, individual heat management and the like.

The application discloses a preparation method of high-efficiency aldehyde-removing liquid, and a product and application thereof. By adopting microcapsule-coated nano zinc oxide particles with photocatalytic activity, the function of removing formaldehyde is exerted, and meanwhile, due to the isolation of the microcapsule wall material, damage of the photocatalytic oxidation reaction to the base organic material is avoided. The microcapsule in the high-efficiency aldehyde-removing liquid has a suitable size, is not easy to penetrate into the inside of porous materials such as fabrics and wood, is easy to wipe clean, and cannot cause white spot residue to affect the appearance. The application is suitable for different material furniture surfaces without leaving white spots, and is harmless to organic material furniture.

The application discloses a preparation method of modified zinc oxide nanotube catalytic material and belongs to the technical field of photocatalytic materials. Deionized water, alcohol, an organic solvent, a basic solid and a zinc salt are used to prepare a one-dimensional zinc-based organic framework structure, then a colloidal solution with photocatalytic properties is mixed with the one-dimensional zinc-based organic framework structure to obtain a modified one-dimensional zinc-based organic framework structure composite material, and finally, the modified one-dimensional zinc-based organic framework structure composite material is calcined in an oxygen-inert gas mixed atmosphere to obtain a tubular catalytic material composed of modified zinc oxide nanoparticles. The one-dimensional zinc-based organic framework structure is constructed, and a calcination method is used to synthesize a tubular catalytic material composed of zinc oxide and narrow-band-gap semiconductor modified zinc oxide nanoparticles. The synthesis method is simple in operation, low in cost and small in waste generation, and can solve the problems of easy agglomeration of nanoparticle catalysts and low catalytic efficiency, so that a tubular photocatalytic material composed of ZnO nanoparticles with high photocatalytic activity is obtained.

This invention discloses a near-infrared light-responsive porous membrane, its preparation method, and its applications, relating to the field of dressing technology. The near-infrared light-responsive porous membrane is composed of polyurethane, PDA@ZnO nanoparticles, and the antibacterial agent QCS. Under near-infrared light excitation, this near-infrared light-responsive porous membrane can generate reactive oxygen free radicals and heat, and release biofunctional zinc ions. Addressing the clinical challenges of chronic wounds, such as their susceptibility to infection and slow healing, this invention provides a new approach to improving the clinical treatment of chronic wounds by using a PDA@ZnO / QCS / TPU porous membrane that achieves highly efficient and precise sterilization under the synergistic effect of specific wavelengths of light, thereby preventing wound infection and promoting wound healing.

A method for improving the germination of *Carex lumbricoides* seeds based on nano-zinc oxide initiation belongs to the field of wetland ecological engineering technology. The invention includes the following steps: First, nano-zinc oxide particles with a particle size of 30±10 nm are dispersed in deionized water by ultrasonic oscillation to prepare a suspension of 12.5-200 mg / L; second, collected *Carex lumbricoides* seeds are float-screened, and plump seeds that sink to the bottom are selected and subjected to surface sterilization; subsequently, the sterilized seeds are immersed in the nano-zinc oxide suspension and initiated by agitation under light-proof conditions for 6 or 24 hours, followed by air drying to restore the initial moisture content; finally, the initiated seeds are placed in an artificial climate incubator for germination culture under specific variable temperature and light conditions. This invention utilizes the biocompatibility of nano-zinc oxide and effectively solves the problems of long germination cycles and low germination rates of *Carex lumbricoides* seeds by precisely controlling the initiation concentration and time. This invention has the advantages of simple operation, low cost, and environmental friendliness, and can significantly improve the germination rate and germination percentage, providing high-quality seedlings for the restoration of degraded wetland vegetation.

The present application relates to a kind of composite piezoelectric negative pressure dressings and its preparation method, belong to medical dressing field.The present application includes: step S1: collagen is dissolved in acetic acid to obtain collagen solution, collagen sponge is obtained by freeze-drying process;Step S2: PVDF powder and ZnO nanoparticles are dissolved in organic solvent to obtain PVDF / ZnO solution;Step S3: the injector equipped with PVDF / ZnO solution is placed in electrospinning machine, collagen sponge is fixed on the collection wheel of electrospinning machine, and PVDF / ZnO nanofiber is covered on collagen sponge to form composite piezoelectric dressing by electrospinning method;Step S4: semipermeable membrane is covered on the top layer of composite piezoelectric dressing, while connecting drainage tube, forming negative pressure system, to obtain composite piezoelectric negative pressure dressing.The present application has good biocompatibility.Nanofiber membrane is more sensitive, and controllable negative pressure intensity makes it have excellent stability, and piezoelectric performance is more excellent.

A system for the synthesis of zinc oxide nanoparticles (ZnO-NPs) comprising the steps of preparing an aqueous extract from Annona muricata leaves, adding the extract to an aqueous solution of zinc acetate dihydrate, adjusting the pH to approximately 8 with sodium hydroxide, stirring and heating the mixture at approximately 70 °C, and collecting and drying the resulting ZnO nanoparticles.

The invention discloses high-strength anti-aging styrene-butadiene rubber and a preparation method thereof, and belongs to the field of synthetic rubber modification. Porous reticular ZnO aggregated by 6.5 nm ZnO nanoparticles is synthesized by a hydrothermal method by using a composite surfactant of PVP K30 and polyvinyl alcohol 600 in a ratio of 1: 1, and the ZnO is not dried after synthesis so as to avoid aggregation; the preparation method comprises the following steps: carrying out surface modification with a silane coupling agent KH560, carrying out segmented temperature control mixing with styrene-butadiene rubber, carbon black N330 and other assistants, and carrying out pre-crosslinking and gradient heating vulcanization to obtain a finished product. A porous net structure allows rubber slurry to fully permeate, the contact area of the filler and a matrix is increased, and efficient reinforcement is realized by low mixing amount; znO nano-particles can convert ultraviolet light into visible light, and the aging resistance is enhanced by matching with the scattering effect of a porous structure; the coupling agent modifies and optimizes the interfacial compatibility, the problem that agglomeration and performance of a traditional filler are difficult to consider is solved, and the finished product has high strength and excellent aging resistance and meets the requirements of tires, sealing elements and other scenes.

The application provides an anti-aging overhead insulated cable, and belongs to the technical field of cables, comprising a conductor, an insulation layer and an outer sheath; wherein the insulation layer is composed of a three-layer structure, and the inner shielding layer, the main insulation layer and the outer protective layer are sequentially arranged from inside to outside; the inner shielding layer is prepared from carbon black modified cross-linked polyethylene, and the thickness is 0.5-1.2 mm; the main insulation layer is a nano zinc oxide-silicon rubber composite material, 5-8 wt% of nano zinc oxide particles are dispersed in the silicon rubber, and the thickness of the main insulation layer is 2-3.5 mm; the outer protective layer is prepared from polyolefin modified by an ultraviolet absorber. The anti-aging overhead insulated cable has the advantages that through the optimization of multi-layer materials and the structural design, the cable has the advantages of anti-aging, weather resistance, high mechanical strength and stable electrical performance.

The present application provides the use of a nanocomposite with a core-shell structure. Specifically, the present application provides the use of a nanocomposite with a core-shell structure in the preparation of a drug for preventing and / or treating Clostridium difficile infection and recurrent diseases caused thereby, wherein the nanocomposite comprises: ZnO nanoparticles as a core; mesoporous silica as a shell coated on the surface of the ZnO nanoparticles; an antibiotic loaded in the pore channel of the mesoporous silica; hyperbranched polylysine modified on the surface of the mesoporous silica; and a pH-responsive coating material as the outermost layer. The nanocomposite provided by the present application can achieve precise targeted release of the drug in the colon, and through the sequential and synergistic mechanism of "membrane breaking-sterilization-spore inhibition-repair", it can simultaneously solve multiple factors leading to CDI recurrence such as biofilm protection, spore storage, bacterial population destruction, mucosal damage, etc., and improve the treatment effect.

The application discloses a kind of high-dispersed zinc oxide nanocomposite polyester chips and preparation method thereof.The application is aimed at improving the dispersing ability and compatibility of ZnO nanoparticles in polyester matrix by suitable and effective surface modification, achieving good dispersion of antibacterial components in polyester matrix during in-situ coating process, and maintaining good spinning and antibacterial performance.ZnO nanoparticles after surface modification are dispersed again in D 90 The modified polyester chips have a size of 100-500 nm and an intrinsic viscosity of about 0.6-1.5 dL / g.The ZnO nanocomposite polyester chips can be used for the preparation of polyester fibers, which have improved antibacterial performance while maintaining good mechanical properties and color phase, ultimately improving product quality and reducing cost.In addition, the prepared polyester fibers have excellent antibacterial effect on escherichia coli and staphylococcus aureus.

The application belongs to the technical field of semiconductor gas sensitive material and sensor, and particularly relates to a selective gas sensitive material for a complex gas environment and a preparation method and application thereof. The gas sensitive material takes WO3 nanofiber as a substrate, composites ZnO nanoparticles on the surface of the substrate, and loads noble metal Ir to form an Ir-ZnO / WO3 ternary composite structure. The composite structure is obtained by adding WO3 nanofiber prepared by an electrospinning method, ZIF-8 precursor and Ir nanoparticles into an anhydrous ethanol solution, and then performing ultrasonic treatment and drying, and finally calcining under an air atmosphere. The material and the sensor exhibit high sensitivity and high selectivity to BTXs, and have good anti-interference ability and stability, and are suitable for real-time monitoring and early warning of BTXs leakage in a complex industrial site with multiple gas interference such as petrochemical industry and waste treatment.

The invention relates to the technical field of analysis and detection, in particular to an electrochemical gas sensor for detecting ocimene and a preparation method of the electrochemical gas sensor. The preparation method comprises the following steps: dispersing multi-walled carbon nanotubes in a ZnO nanoparticle solution, and then coating the surface of an electrode with the ZnO nanoparticle solution to prepare a composite material modified electrode; then ocimene template molecules and acrylamide functional monomers are dispersed in an alcohol solvent, polymerization reaction is performed under the action of a cross-linking agent and an initiator, and a molecularly imprinted polymer solution is prepared; and finally, coating the surface of the electrode modified by the composite material with a molecularly imprinted polymer solution, and eluting template molecules to obtain the electrochemical gas sensor. The sensor can sensitively and accurately detect the content of ocimene gas released in plants, and realizes high-specificity and high-sensitivity stable and accurate detection of ocimene in a complex environment. The invention provides important theoretical basis and technical support for cultivating high-quality crops, and assists the innovative development of the field of crop breeding.

This invention provides a nanocomposite material with a core-shell structure. The nanocomposite material comprises: ZnO nanoparticles as the core; mesoporous silica as the shell coating the surface of the ZnO nanoparticles; an antibiotic loaded within the pores of the mesoporous silica; hyperbranched polylysine modified on the surface of the mesoporous silica; and a pH-responsive coating material as the outermost layer. The nanocomposite material provided by this invention enables precise targeted drug release in the colon, simultaneously addressing multiple factors leading to CDI recurrence, such as biofilm protection, spore storage, microbial disruption, and mucosal damage, through a sequential synergistic mechanism of "membrane disruption-bactericidal-spore inhibition-repair," thereby improving treatment efficacy.

This invention relates to a method for preparing a black high-transparency resin composite board and its application, belonging to the field of advertising materials technology. The resin of this invention is composed of a black transparent layer, a light-guiding layer, and a diffusion layer. The high-transparency layer uses carboxylated carbon nanotubes modified with a silane coupling agent, polymerized with methyl methacrylate monomers, and magnetically oriented to achieve high light transmittance and a pure black appearance. The light-guiding layer uses polycarbonate as a matrix, adding SiO2 microspheres, and improves the lateral light propagation efficiency through hot pressing. The diffusion layer uses polymethyl methacrylate as a matrix, adding ZnO nanoparticles, and processing a periodic microprism structure on the surface to achieve uniform light diffusion. When applied to light boxes, it presents a pure black appearance when the light source is off, and exhibits high light transmittance without any impurities when on, making it suitable for high-end advertising displays, vehicle-mounted light boxes, and other scenarios.

The present application provides an anti-odor coating, a method for manufacturing the anti-odor coating, and a cup. The anti-odor coating comprises a non-stick layer and nano zinc oxide particles filled in the non-stick layer. The cup with the anti-odor coating according to the embodiments of the present application can ensure that foreign matters (e.g. particulate matters, liquid droplets) are not easily adhered to the anti-odor coating after use, thereby reducing the source of odor from the root. The nano-sized zinc oxide can catalyze the system composed of water and air under the condition of photoexcitation to produce active oxygen groups, which can catalyze / degrade various organic molecules to decompose into inorganic substances such as carbon dioxide and water molecules, so that the anti-odor coating with nano zinc oxide particles can reduce or basically solve the odor problem of the cup after use.

The invention discloses functional nano zinc oxide as well as a preparation method and application thereof, and belongs to the technical field of food packaging materials and functional nano composite materials. The preparation method comprises the following steps: dissolving dialdehyde cellulose in a hydrochloric acid solution, mixing with a procyanidine solution dissolved in DMSO (Dimethylsulfoxide), heating to react, dialyzing and drying to obtain a cellulose-polyphenol graft; and uniformly mixing the cellulose-polyphenol graft aqueous solution with a zinc nitrate aqueous solution, adjusting the pH value, carrying out a hydrothermal reaction, carrying out centrifugal separation, washing the precipitate, and drying to obtain the functional zinc oxide nanoparticles. Through an aldehyde cellulose-polyphenol grafting strategy, the particle size controllability and dispersity of ZnO nano particles are improved, the ZnO nano particles are endowed with higher specific surface area and functionality, and after the ZnO nano particles are loaded to a chitosan film, the oxidation resistance, antibacterial property and mechanical strength of the film are remarkably enhanced.

The application discloses a preparation method and application of a GO-rGO / ZnO / GelMA bio-ink material. The rGO reduced by a physical method of ultraviolet irradiation is compounded with GelMA hydrogel, and ZnO nanoparticles are introduced at the same time. The rGO and the ZnO nanoparticles synergistically act, on the one hand, improve the printing performance of the GelMA hydrogel, and on the other hand, reduce the swelling rate and degradation rate of the GelMA hydrogel support, and improve the compression modulus, biological activity, osteogenic property and antibacterial performance of the GelMA hydrogel support. Therefore, the GO-rGO / ZnO / GelMA composite bio-ink material prepared by the application has the printing performance, biological activity, osteogenic property and antibacterial property, can realize integrated and synergistic repair of osteogenesis and anti-infection, and can be widely applied to the preparation of bone repair materials. Meanwhile, the ZnO-rGO composite system can be applied to interior wall coating as an effective antibacterial agent.

The invention belongs to the technical field of semiconductor technologies, and discloses a blood glucose detection device based on a non-toxic colloidal quantum dot photodiode, which comprises a near-infrared light source module, a photoelectric conversion module, a signal processing module and a blood glucose calculation module, the photoelectric conversion module is a non-toxic colloidal quantum dot photodiode; the non-toxic colloid quantum dot photodiode comprises a bottom reflection electrode, a DBR layer, an N-type layer, an absorption layer, a P-type layer and a top transparent electrode which are sequentially stacked. The N-type layer is a TiO2 or ZnO nano particle layer; the absorption layer is an intrinsic AgBiS2 and ZnTe mixed colloid quantum dot layer; the P-type layer is a CuInS2 colloidal quantum dot layer; the top transparent electrode is made of ITO or AZO. The long-term safety of the device can be remarkably improved, and the device is more suitable for non-invasive wearable blood glucose monitoring application which is in contact with or is attached to the skin of the human body.

The invention discloses efficient tumor sonodynamic therapy nanoparticles based on carbon-doped nano-zinc oxide as well as a preparation method and application of the efficient tumor sonodynamic therapy nanoparticles. Belongs to the field of biomedicine. On the basis of MOF-5, carbon-doped hollow-hole-shaped nano-particles C-ZnO are formed after calcination in a nitrogen atmosphere, then chloroplatinic acid hexahydrate and sodium borohydride are added into a C-ZnO nano-particle solution, so that Pt nano-particles are loaded on the surface of C-ZnO, in addition, AB is loaded in a CZP hollow structure, HA-AA modification is carried out on the surface of the CZP hollow structure, and the CZP hollow structure loaded with the AB is obtained. Therefore, the effects of hydrogen treatment, consumption of excessive glutathione in a biological microenvironment and targeting are achieved, and the effect of treating cancers is achieved from multiple aspects. The nano particles are uniform in size, the average particle size is about 200 nm, good biocompatibility is achieved, and the material prepared through the method has excellent ROS generation capacity, so that the material has excellent sonodynamic therapy potential and has wide application prospects in the field of tumor therapy.

The invention belongs to the technical field of personal protection air filtering materials, and discloses a paper-based air filtering material for loading a nano functional substance by using gel as well as a preparation method and application of the paper-based air filtering material. According to the material, natural polymer hydrogel is used as a carrier, metal oxide nanoparticles and a metal organic framework compound are loaded at the same time, and efficient compounding with a paper-based material is achieved. The metal oxide is ZnO nanoparticles, the MOFs is ZIF-8, and the natural polymer is carboxymethyl cellulose. The preparation method comprises the following steps: respectively preparing ZIF-8 / carboxymethyl cellulose composite gel particles and ZnO / carboxymethyl cellulose composite gel particles, then mixing the ZIF-8 / carboxymethyl cellulose composite gel particles and ZnO / carboxymethyl cellulose composite gel particles with paper pulp, carrying out papermaking forming, and carrying out freeze drying to obtain the composite paper. Functional substances are effectively prevented from being lost through the gel carrier, uniform distribution and stable combination of the functional substances in the paper base are promoted, and the high PM2.5 filtering paper has high PM2.5 filtering efficiency, excellent antibacterial performance and good biological safety and is suitable for degradable personal protection articles.

The invention belongs to the field of nano materials, and relates to a green synthesis method of an Ag-ZnO nano material and application of the Ag-ZnO nano material in the field of environmental restoration, in particular to application of the Ag-ZnO nano material in photocatalytic degradation of organic dye. According to the method, the Ag-ZnO NPs is constructed by synchronously reducing Ag < + > and Zn < 2 + > by taking natural active components in an astragalus extract as a biological reducing agent and a stabilizing agent. The influence of the catalyst dosage, the initial dye concentration and the pH value of a reaction system on the methyl violet photocatalytic degradation performance of the Ag-ZnO NPs is also investigated. Under optimized reaction conditions, the degradation rate of the methyl violet within 90 minutes can reach 95.11%. In addition, the Ag-ZnO NPs photocatalyst shows good reusability, and still keeps relatively high catalytic activity after being continuously and circularly used for three times. According to the present invention, the developed Ag-ZnO nano-particle synthesis process is green and environmentally friendly, the toxic chemical reducing agent does not need to be used, the prepared nano-material has efficient photocatalytic performance, and the new material and the technical basis are provided for the green treatment of organic dye pollutants.

The invention discloses a graded sintering preparation method of silver powder with a core-shell structure, which comprises the following steps: S1, preparing multi-stage silver seed crystals, namely preparing silver seed crystals with three characteristic particle sizes step by step by adopting a differential liquid phase reduction method, namely first-stage seed crystals of 80nm, second-stage seed crystals of 150nm and third-stage seed crystals of 300nm; s2, gradient coating sintering: mixing the three stages of seed crystals according to a mass ratio of 3: 5: 2, and carrying out segmented treatment in nitrogen-hydrogen mixed gas; and S3, surface conductive treatment is conducted, specifically, polythiophene with the molecular weight being 8000-12000 Da is dissolved in a 0.5 wt% ethanol solution and stirred for 30 min, then ZnO nanoparticles with the doping concentration being 0.3 wt% are added, high-speed shearing dispersion is conducted for 60 min, it is ensured that the coverage rate is larger than or equal to 85%, a mixed solution is obtained, finally, the silver powder obtained in the step S2 is soaked in the mixed solution, ultrasonic dispersion is conducted for 10 min, and the surface activated silver powder is obtained after drying.

The application discloses a zinc oxide / molybdenum disulfide nanocomposite and a preparation method and application thereof. The zinc oxide / molybdenum disulfide nanocomposite is prepared by taking bulk molybdenum disulfide and zinc acetate as raw materials, peeling off few-layer molybdenum disulfide nanosheets from the bulk molybdenum disulfide by using an ultrasonic cell pulverizer, and depositing ZnO nanoparticles on the molybdenum disulfide nanosheets in situ by using a coprecipitation method. The composite material has regular morphology, and the sizes of the two base materials are matched. The specific steps of the preparation method include that the method has low cost, simple equipment and low operation difficulty, and can be used for industrial large-scale production. The obtained zinc oxide / molybdenum disulfide nanocomposite has excellent abilities in antibiosis, biofilm removal, anti-inflammation and blood vessel formation, and can be applied to the fields of biomedical materials and the like.

The present disclosure relates to a nanomaterial, a light-emitting diode device, and a preparation method thereof. The nanomaterial includes a ZnO nanoparticle and an In2O3 shell layer covering a surface of the ZnO nanoparticle. In the present disclosure, the In2O3 shell layer are coated on the surface of the ZnO nanoparticle to form a ZnO@ In2O3 core shell structure, that is, prepare the nanomaterial. In the present disclosure, In2O3 having a wide bandgap is used as a shell layer to cover a semiconductor ZnO nanoparticle having a relatively narrow bandgap, which can effectively passivate the surface of the ZnO nanoparticle to reduce the surface defects and relieve lattice mismatch. Meanwhile, holes may be effectively blocked from being transported from a light-emitting layer to a cathode to improve the recombination efficiency of electrons and holes on the light-emitting layer. Thus, the light-emitting performance of the light-emitting device may be improved.

The application belongs to the field of medical devices, and particularly relates to a medical catheter coating. The medical catheter coating comprises the following components in total amount parts: modified Cu-ZnO nanoparticles 10-15 parts; water-based PUA resin 25-35 parts; active diluent 10-25 parts; surfactant 1-1.5 parts; photoinitiator 1-2 parts; auxiliary agent 0.5-1 part; deionized water 10-20 parts; methanol and / or ethanol 40-60 parts. The coating provided by the application has good hydrophilicity, can reduce the friction between the catheter and human tissues, and has high antibacterial property.

This invention discloses an antibacterial and mosquito-repellent composite material based on plant extracts, its preparation method, and a latex paint. The method includes: providing a zinc ion solution and an alkaline precipitant solution, wherein the alkaline precipitant solution is selected from at least one of sodium hydroxide solution, potassium hydroxide solution, or ammonia water; mixing and reacting the zinc ion solution and the alkaline precipitant solution, controlling the final pH value of the reaction to be 8-11, and then post-processing to obtain nano-zinc oxide particles; dispersing the nano-zinc oxide particles in an L-cysteine ​​solution, adding a stabilizer to obtain an L-cysteine-modified nano-zinc oxide dispersion; adding β-alanine and plant extracts to the nano-zinc oxide dispersion, homogenizing and drying to obtain the antibacterial and mosquito-repellent composite material; wherein the plant extract is selected from at least one of thymol or geraniol, nocaketone, physalisol, citronella oil, and lemon eucalyptus oil, combined with thymol. This invention can produce an antibacterial and mosquito-repellent composite material with long-lasting antibacterial and mosquito-repellent effects.

This invention discloses a nanoparticle-reinforced nylon-based engineering plastic and its preparation method, belonging to the field of polymer engineering composite materials technology. The engineering plastic uses PA6 as a matrix, porous hollow ZnO nanoparticles prepared by PS template method as reinforcing fillers, supplemented with antioxidants, lubricants, and silane coupling agents, and is prepared through solvothermal reaction, calcination, acid activation, surface modification, and melt blending extrusion. This invention uses a PS microsphere template-assisted solvothermal-calcination process to prepare ZnO nanoparticles with internal cavities and abundant through-pores on the surface. After activation with dilute acetic acid and modification with KH-550, the problem of nanofiller agglomeration is effectively solved, achieving mechanical interlocking with the nylon matrix. The preparation process of this invention is controllable, and the resulting composite material, compared with pure PA6, exhibits significantly improved tensile strength and surface hardness, no significant decrease in elongation at break, and significantly optimized wear resistance. It possesses excellent overall performance and is suitable for high-end equipment structural components under high load and high friction conditions, showing promising prospects for industrial application.

A nanomaterial includes a core and an outer shell. The core includes ZnO nanoparticles and a metal element doped in the ZnO nanoparticles. The outer shell includes a metal oxide.