14568 results about "Siloxane" patented technology

Improved performance ion exchange membranes for use in REM, AEM and DMFC fuel cells, buffered fuel cells, hydrolysis, other applications comprise a molecular matrix of homopolymers, di-monomer, heteropolymers, copolymers, or block-polymers of fluorocarbon and hydrocarbon compounds combined with (i) skeletal support grid to improve durability, handling, reduce membrane swelling, and sequester dopants and nanoparticles from leakage; (ii) microporous membrane formed using a sacrificial filler process enhancing conductivity and limiting fuel crossover; (iii) hetero-ionomeric matrix of two-or-more membrane-bound acids e.g. sulphonic and phosphonic acid expanding usable range; (iv) permanent fillers enhancing conductivity and porosity including nanoparticles, metal-oxides, zeolites, silicates, GOs, CNTs, MOFs, POSS, and others; (v) ionic liquid doping to enhance membrane conductivity; (vi) membrane nanocoating preventing H2O2 diffusion; and / or (vii) catalytic nanocoating with metals, metal-oxides, and MOFs preventing atmospheric toxin catalyst poisoning. Combined with a heterogenous GDI, the IEM is integrated into iBFC power blade and energy bank applications.

The invention provides a low-voltage cable, and relates to the technical field of cables, the low-voltage cable comprises a conductor layer, a support layer, a shielding layer and a sheath layer, the conductor layer is composed of multiple strands of fractal stranded conductors, and each fractal stranded conductor comprises an inner-layer superfine silver-plated copper wire, a middle-layer copper-clad aluminum wire and an outer-layer nickel-plated copper alloy wire; the supporting layer wraps the conductor layer and comprises an inner supporting layer, a dynamic framework layer and an outer restraint layer, the inner supporting layer is an obliquely wound aramid fiber woven belt, the dynamic framework layer is formed by alternately arranging shape memory polymers and carbon fiber composite belts, and the outer restraint layer is a spirally wound silica gel-glass fiber composite rope. The shielding layer comprises a tinned copper wire woven mesh; the sheath layer is a thermoplastic polyurethane matrix, a microcapsule self-repairing agent is dispersed in the thermoplastic polyurethane matrix, a microcapsule comprises a siloxane prepolymer, and the thermoplastic polyurethane matrix further comprises graphene nanosheets. Through collaborative design of the fractal stranded conductor layer, the dynamic skeleton support layer, the shielding layer and the self-repairing sheath, comprehensive improvement of cable performance is realized.

The invention belongs to the technical field of copper-clad plates, and relates to a low-dielectric high-heat-resistance copper-clad plate and a preparation method thereof. By introducing the POSS resin, the dielectric constant of the copper-clad plate is effectively reduced, which is crucial for reducing signal delay and improving signal transmission efficiency. The introduction of the POSS resin not only improves the dielectric properties of the material, but also improves the glass transition temperature (Tg) of the material, which means that the physical and chemical properties of the material can be kept unchanged at a higher temperature, and the material is suitable for wider environmental conditions. By using the resin and the inorganic filler in a specific ratio, the copper-clad plate shows excellent copper foil peel strength, and ensures that the bonding force between the copper foil and the base material is not easily weakened under long-term use or severe conditions. Meanwhile, the material also has excellent CAF (conductive anode wire) resistance, can effectively prevent internal short circuit caused by moisture, and prolongs the service life of an electronic product.

The invention discloses a high temperature and high pressure resistant electric power tube and a preparation method thereof, the electric power tube comprises the following raw materials by weight: 100-120 parts of polyethylene master batch, 5-10 parts of a modifier, 0.5-1 part of benzoyl peroxide and 20-30 parts of a modified filler, in a melt extrusion process of the raw materials, a maleimide structure on a molecular side chain of the modifier can be grafted with a polyethylene molecular chain, and the molecular chain of the modifier can be grafted with the polyethylene molecular chain. Meanwhile, an organic silicon chain segment and a benzene ring structure are added in a polymer molecule, the high-temperature-resistant effect of the material is improved, after reflux treatment in water, a siloxane structure in the modified filler and a siloxane structure in a modifier molecule can be subjected to hydrolytic condensation, and therefore the high-temperature-resistant and high-pressure-resistant effects of the material are improved. According to the invention, polyhedral oligomeric silsesquioxane is taken as a core, boron nitride is taken as a shell to form a core-shell structure, and the three-dimensional grid structure of the polymer can greatly improve the high-temperature-resistant and high-pressure-resistant effects of the polymer.

The invention discloses a preparation method and application of a polydimethylsiloxane super-hydrophobic anti-icing and deicing material, and belongs to the technical field of polydimethylsiloxane coatings and anti-icing and deicing coating paints in the fields of ships, airplanes, high-speed rails, ocean engineering and the like, and the preparation method comprises the following steps: preparing PDMS / CNTs porous foam by using polydimethylsiloxane and carbon nanotubes; and carrying out spraying modification on the PDMS / CNTs porous foam by using the CNTs / SiO2 super-hydrophobic composite coating solution, and curing to obtain the polydimethylsiloxane super-hydrophobic anti-icing and deicing material. The prepared polydimethylsiloxane super-hydrophobic anti-icing and deicing material can be used for photo-thermal deicing and defrosting, and has excellent photo-thermal stability, excellent super-hydrophobicity, good corrosion resistance and good wear resistance. The polydimethylsiloxane super-hydrophobic anti-icing and deicing material prepared by the preparation method disclosed by the invention has a good ice melting effect and defrosting capability.

To provide a film that well maintains oil repellent properties even when used continuously in a high temperature environment.SOLUTION: A film contains: resin; and a siloxane compound that has a structure A of the formula [RSiO1.5]n (in the formula, R represents an organic group, and n represents an integer of 2 or more), wherein at least one R of a plurality of Rs present in the structure A is a group including an alkyl group, and the difference in the solubility parameter (SP value) between the resin and the structure A is 3.0 or less in terms of absolute value. The film has a surface free energy of 40 mJ / m2 or less.SELECTED DRAWING: None

The invention relates to a self-cleaning nano coating material and a preparation process thereof, and belongs to the technical field of functional coatings. The coating material is prepared from nano silicon dioxide, nano aluminum oxide, graphene nanosheets, nitrogen-doped titanium dioxide, fluorinated silane, polyurethane, polydimethylsiloxane, a microcapsule repairing system, ethanol and deionized water according to a specific proportion through a multi-layer composite structure. The preparation process comprises the steps of base material surface pretreatment, reinforced particle surface modification, base material dissolution, functional additive introduction and multi-layer coating preparation. Through bottom layer enhancement, middle layer flexible buffering and surface layer functional design, excellent mechanical strength, wide-spectrum photocatalytic performance, self-repairing capacity and environmental adaptability are achieved. The problems that in the prior art, a self-cleaning coating is insufficient in mechanical performance, low in photocatalytic efficiency, lack of a self-repairing function and poor in weather resistance are solved, the service life of the coating is remarkably prolonged, and the functional stability of the coating is remarkably improved.

The invention relates to the technical field of folding screen supporting films, and particularly discloses a double-layer buffering supporting film for a flexible folding display screen and a preparation method of the double-layer buffering supporting film. The double-layer buffer supporting film for the flexible folding display screen sequentially comprises a release film layer, a first adhesive layer, a first stainless steel layer, a second adhesive layer, a second stainless steel layer and a protective film layer from top to bottom, the first adhesive layer and the second adhesive layer are prepared by curing the same pressure-sensitive adhesive composition; the pressure-sensitive adhesive composition is prepared from the following raw materials: acrylate copolymer, hydrogenated rosin glyceride, hyperbranched polyesteramide-dopamine conjugate, acylhydrazone bond modified siloxane, a curing agent and a silane coupling agent; the protective film layer comprises the following raw materials: PET particles, nano silicon dioxide, an ethylene-vinyl acetate copolymer and an antioxidant. The double-layer buffer supporting film has the advantages of being high in supporting rigidity and interlayer peel strength, and serious folds caused by long-term repeated folding of the folding screen can be relieved.

The invention relates to the technical field of power transmission, in particular to a moisture-proof cable which sequentially comprises a conductive wire core, a gradient buffer layer, a dynamic sealing layer, a flexible supporting layer and a self-repairing sheath from inside to outside. A gradient buffer layer; the dynamic sealing layer is of a split type sealing structure formed by an outer ring surface sealing lip and an inner ring surface static sealing belt, the outer ring surface sealing lip is formed by embedding a polytetrafluoroethylene fiber reinforcing layer in a silicone rubber matrix, and the surface of the outer ring surface sealing lip is coated with a humidity response type graphene coating; the flexible supporting layer is formed by spirally winding a nickel-titanium alloy belt, and bionic fish scales are welded to the surface of the nickel-titanium alloy belt; the self-repairing sheath is characterized in that a hexagonal honeycomb structure is molded on the outer layer, hydroxyl-terminated polysiloxane and a platinum catalyst are contained in an A-type microcapsule, and modified epoxy resin is contained in a B-type microcapsule. The moisture-proof cable shows excellent corrosion resistance, moisture resistance and self-repairing capability in a humid environment, and can maintain good performance when subjected to external physical impact.

The invention relates to the technical field of low-dielectric heat-conducting functional materials, in particular to a nano silicone rubber composite material as well as a preparation method and application thereof. According to the preparation method, a modified vinyl silsesquioxane coupling agent is taken as a bridge, and boron nitride nanosheets, silicon carbide nanowires and the modified vinyl silsesquioxane coupling agent are covalently connected through hydrolysis reaction, so that a heterostructure is constructed, and the nano heat-conducting filler is obtained; the preparation method comprises the following steps: dispersing a nano heat-conducting filler in vinyl silicone oil, and constructing a covalent cross-linked network through addition cross-linking reaction and curing treatment to obtain the nano composite silicone rubber material. According to the processing method, the filling amount, the dielectric constant and the dielectric loss can be reduced, meanwhile, the heat conduction capacity is improved, and the problems that in the prior art, the dielectric constant and the dielectric loss are low due to simple mixing of the boron nitride nanosheets and the silicon carbide nanowires are solved.

The invention belongs to the technical field of composite coatings, and particularly relates to a corrosion-resistant and ultraviolet-resistant protective coating for wind power generation equipment and a preparation method thereof.The corrosion-resistant and ultraviolet-resistant protective coating for the wind power generation equipment is prepared from, by mass, 40-60 parts of gradient fluorosilicone modified polyurethane resin, 5-12 parts of core-shell type ZnO-coated MOFs composite particles, 1-3 parts of a curing agent, 1-3 parts of a curing agent and 1-3 parts of a curing agent. According to the invention, the problems of poor ultraviolet resistance, poor weather resistance, poor corrosion resistance, poor corrosion resistance, poor corrosion resistance, poor corrosion resistance, poor corrosion resistance and the like in the existing coating and the preparation process thereof are well solved; the shielding layer is single and incapable and has a poor self-repairing effect; and the coating toughness of an epoxy resin system is insufficient and cannot adapt to fatigue deformation of equipment under a vibration working condition.

To provide a film with high oil repellency even in a high temperature environment.SOLUTION: There is provided a film having a structure A of a formula: [RSiO1.5]n (wherein R represents an organic group, and n represents an integer of 2 or more), and at least one R in the structure A includes a siloxane compound having an alkyl group.SELECTED DRAWING: None

The invention relates to the technical field of protective films, in particular to a low-viscosity low-climbing polyurethane optical protective film and a preparation method thereof. The preparation method comprises the following steps: carrying out sulfydryl-alkene click reaction on double-bond-containing hyperbranched polyester, 1H, 1H, 2H, 2H-perfluorodecanethiol and sulfydryl-containing organic silicon, and introducing a fluorine-containing chain segment and a siloxane chain segment to obtain modified hyperbranched polyester; then introducing the modified hyperbranched polyester into polyurethane through a grafting modification method, so as to prepare the polyurethane adhesive; and coating the surface of a base material with the polyurethane adhesive, compounding with a release film, and curing to obtain the polyurethane optical protective film. The polyurethane optical protective film prepared by the invention has excellent low viscosity and low climbing performance, can effectively protect the surface of an optical device from being polluted and damaged, and improves the service life and stability of the optical device.

The invention relates to a photo-thermal super-hydrophobic multifunctional anti-icing coating as well as a preparation method and application thereof. The photo-thermal super-hydrophobic multifunctional anti-icing coating comprises primer and finish paint, the primer comprises the following raw materials in parts by weight: 20-25 parts of bisphenol A type epoxy resin and / or fluorine modified epoxy resin, 10-20 parts of fluorine modified polyacrylic resin and / or polyurethane resin, 5-10 parts of a curing agent and 40-55 parts of a solvent; the finish paint comprises the following components in parts by weight: 2-5 parts of polytetrafluoroethylene, 1-3 parts of soluble polytetrafluoroethylene, 1-5 parts of polydimethylsiloxane and 85-90 parts of fluorinated MOF dispersion liquid. Compared with the prior art, the photo-thermal super-hydrophobic multifunctional anti-icing coating provided by the invention has the characteristics of super-hydrophobicity, rapid ice melting, wear resistance, reduction of ice adhesion strength and reduction of icing amount, can effectively solve the problem of icing of an aluminum conductor of a power transmission line of a power system, and can be applied to power equipment such as the aluminum conductor of the power transmission line.

The invention relates to an oil-resistant flame-retardant composite sealing material as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. Fluororubber, nitrile rubber, ethylene propylene diene monomer, chlorinated polyethylene and maleic anhydride grafted polypropylene are adopted to prepare composite rubber according to a certain proportion; then adding hydrogenated polyisobutene, a vinyl polydimethylsiloxane-polymethylsiloxane silsesquioxane cross-linked polymer, an E-GMA-VA terpolymer, magnesium hydroxide, basalt fiber powder, ammonium polyphosphate, triphenyl phosphate, expansible graphite, zinc borate, a vulcanizing agent, an accelerant, an anti-aging agent, a plasticizer and other components according to a proportion, and performing banburying in special steps; the prepared sealing material has good mechanical properties, especially has oil resistance and flame retardance, and the service life is greatly prolonged.

The invention discloses one-step solvent-free methyl phenyl-terminated vinyl polysiloxane and silica gel, and the methyl phenyl-terminated vinyl polysiloxane is prepared by the following steps: adding octamethylcyclotetrasiloxane, octaphenylcyclotetrasiloxane and dimethyl-terminated vinyl silicone oil into a reaction container, and uniformly stirring; vacuumizing the reaction container, and introducing nitrogen to form an oxygen-free environment; heating the reaction container to 180-200 DEG C step by step, and adding a catalyst at 50-80 DEG C; the step-by-step heating comprises a first-stage pre-polymerization reaction at the temperature of 90 DEG C or below and a second-stage polymerization reaction at the temperature of 90 DEG C or above, and methyl phenyl vinyl-terminated polysiloxane is prepared. The high-temperature-resistant and high-pressure-resistant methyl phenyl silica gel is obtained by mixing methyl phenyl vinyl-terminated polysiloxane with an inhibitor, a cross-linking agent and a cross-linking catalyst, degassing, heating, cross-linking and curing, the performance requirements of high-power semiconductor devices on high-pressure resistance, high-temperature resistance and the like of packaging materials can be met, the product quality is stable, and the production efficiency is high.

A displacement sensor including an optical whispering gallery mode (WGM) microresonator and a package encasing at least a portion of the WGM microresonator, the package comprising polydimethylsiloxane (PDMS). The WGM microresonator can be configured as a sensor and used in a displacement detection system that can detect displacement with high quality. Artificial intelligence can be implemented in the displacement detection system for improved sensing of different variables and / or pinpointing the location of perturbations.

The preparation method comprises the following steps: adding a hydroxyl derivative of bis-spiro pentaerythritol diphosphate and hydroxyl-terminated polysiloxane into a three-neck flask which is provided with a mechanical stirrer and a thermometer together, uniformly stirring, adding an organic silicon catalyst, stirring, adding an organic silicon catalyst, stirring, adding an organic silicon catalyst, stirring, adding an organic silicon catalyst, stirring, adding an organic silicon catalyst, stirring, adding an organic silicon catalyst, and stirring to obtain the UV-cured polyurethane with the synergistic flame retardance of the bis-spiro phosphate and the organic silicon, thereby obtaining the UV-cured polyurethane with the synergistic flame retardance. Dibutyltin dilaurate and diisocyanate are dropwise added for a reaction, then hydroxypropyl methacrylate is added, the reaction continues to be conducted, and a polyurethane prepolymer containing bis-spiro phosphate and organic silicon is obtained; and then adding an ultraviolet light initiator, and carrying out UV curing to obtain the UV-cured polyurethane. The pencil hardness of the UV curing material is 2B-9H, the initial thermal decomposition temperature is 246.0-298.2 DEG C, the LOI is 26.0-33.2%, the flame retardant grade is V-1-V-0 grade, and the UV curing material can be used as an electronic flame retardant sealant, a flame retardant three-proofing paint, a flame retardant industrial paint, a flame retardant tent cloth coating and the like.

The invention relates to the field of hot melt adhesives, and discloses a biodegradable hot melt adhesive based on castor oil and rosin resin and a preparation process thereof, the biodegradable hot melt adhesive comprises EVA resin, modified castor oil, rosin resin, a modified additive, a lubricant and an antioxidant; the modified castor oil is prepared by crosslinking castor oil and isophorone diisocyanate and reacting lignin, 1, 4-butanediol and isocyanate groups; the modified castor oil and the modified additive are added, the modified castor oil and the modified additive are added, the modified castor oil and the modified additive are added, the modified castor oil and the modified additive are added, the modified castor oil and the modified additive are added, the modified castor oil and the modified additive are added, and the modified castor oil and the modified additive are added, so that the modified castor oil and the modified additive are added, and the modified castor oil and the modified additive are added; the tensile property and the adhesive property of the hot melt adhesive are improved, and meanwhile, the flame retardant property and the high and low temperature resistance of the hot melt adhesive can be improved.

The invention relates to the technical field of building materials, and particularly discloses a high-performance solid-waste-based grouting material and a preparation method thereof. Comprising the following raw materials in parts by weight: 32 to 54 parts of Portland cement, 12 to 16 parts of a modified admixture, 2.4 to 3.6 parts of a functional filler, 42 to 56 parts of aggregate, 45 to 55 parts of a photoinitiator solution, 0.6 to 0.8 part of a water reducing agent, 0.9 to 1.1 parts of a composite expanding agent, 0.04 to 0.06 part of a defoaming agent and 9.2 to 12.4 parts of deionized water. Siloxane groups, acylamino groups, ester groups and benzene rings are chemically bonded on the surface of the modified admixture, so that the hydrophilicity of the modified admixture is reduced, the modified admixture can form hydrogen-bond interaction with hydroxyl groups and cement hydrates on the functional filler, and meanwhile, a flexible long-chain alkane structure on the functional filler can be entangled with the modified admixture, so that the flexibility of the modified admixture is improved. The mechanical property, the durability and the fluidity of the grouting material are improved.

The invention belongs to the technical field of polyurethane pouring sealants, and particularly relates to a two-component hydrophobic heat-resistant polyurethane pouring sealant and a preparation method thereof. The pouring sealant is prepared by reacting a component A and a component B, the component A is prepared from the following raw materials in parts by weight: 17 to 33 parts of modified polyether polyol I; 15 to 27 parts of modified polyether polyol II; 18 to 30 parts of diisocyanate; 20 to 34 parts of a plasticizer; the component B is prepared from the following raw materials in parts by weight: 47 to 64 parts of polyether polyol III; 36 to 53 parts of filler; and 0.15 to 0.35 part of a catalyst. Introducing a silicon-oxygen-silicon chain segment into a polyether polyol structure through acrylic acid bridging to prepare siloxane modified polyether polyol; more side ethyl, phenyl and neopentyl structures are introduced into the polyether polyol, so that the intrinsic hydrophobicity and temperature resistance of the raw materials are further improved, and the polyurethane pouring sealant shows relatively high hydrophobicity and heat resistance.

The invention relates to the technical field of macromolecules, and discloses a preparation method of modified polyurethane toughened epoxy resin, which comprises the following steps: by taking 4-(Boc-amino) phenylboronic acid, diethanol amine, 1, 3-bis (3-glycidyl ether oxypropyl) tetramethyldisiloxane and the like as raw materials, carrying out a series of chemical reactions to obtain a borate siloxane chain extender; the method comprises the following steps: adding a polyurethane prepolymer into the epoxy resin, participating in chain extension of polyurethane, and modifying the epoxy resin by using the polyurethane prepolymer to obtain the modified polyurethane toughened epoxy resin. A'soft segment 'and an Si-O structure in the modified polyurethane can also improve the flexibility of a curing network, effectively change the fracture mechanism of the resin, absorb a large amount of energy when the resin is fractured, and contribute to improving the toughness of the epoxy resin; on the basis of ensuring the strength of the epoxy resin, the toughness and flame retardant property of the epoxy resin are improved, and the epoxy resin can be applied to the fields of composite materials, coatings, adhesives and the like with higher toughness and flame retardant requirements, and has wide applicability.

The invention relates to the technical field of polyester fibers, in particular to a high-strength wear-resistant polyester fiber and a preparation method thereof. The invention aims to solve the problem that the mechanical strength and wear resistance of the existing polyester fiber are difficult to consider at the same time. The preparation method comprises the following steps: carrying out esterification and polycondensation on terephthalic acid, ethylene glycol, hydroxyl-terminated polydimethylsiloxane and isophthalic acid to obtain modified PET; the preparation method comprises the following steps: respectively carrying out oxidation treatment on graphene and a multi-walled carbon nanotube, and then adding polyether amine for grafting; carrying out melt blending with PET slices to obtain nano master batches; carrying out melt blending on the chopped glass fibers and the PET slices to prepare micron master batches; and mixing the modified PET, the nano master batch and the micron master batch, carrying out ultrasonic dispersion, adding an auxiliary agent, and carrying out melt spinning, three-section stretching and three-section heat setting treatment to obtain the high-strength wear-resistant polyester fiber. Through the synergistic effect of the components and the process, the prepared fiber has excellent mechanical properties and wear resistance, and has wide application prospects in the fields of clothing, home textiles, industry and the like.

The invention relates to a mildew-proof silicone sealant with high curing rate and high adhesive strength, and belongs to the technical field of adhesives. The anti-mildew coating is prepared from alpha, omega-dihydroxy polydimethylsiloxane, dimethyl silicone oil, fumed silica, phenoxy resin coated nano calcium carbonate, a modified hydroxypropyl-gamma-cyclodextrin loaded mildew preventive, dibutyltin dilaurate, methyltrimethoxysilane and a curing accelerator. According to the mildew-proof silicone sealant with the high curing rate and the high adhesive strength, the surface drying time is 9-13 minutes, the 24-hour curing depth is 6.3-7.2 mm, the adhesive strength is 3.0-3.6 MPa, the tensile strength is 5.8-6.4 MPa, the shear strength is 3.0-3.9 MPa, the elongation at break is 410-457%, and the mildew-proof grade is 0 grade in 30 days, 60 days, 180 days and 360 days.

The invention relates to the field of physiological status detection, and provides a wearable microfluidic fluorescence sensor based on a Janus membrane for sweat analysis. The sensor comprises a Janus membrane-based micro-fluidic chip and a fluorescent sensing layer which are stacked, the Janus membrane-based micro-fluidic chip comprises a hydrophobic nanofiber membrane, a bottom polydimethylsiloxane layer, a hydrophilic nanofiber membrane and a top polydimethylsiloxane layer which are stacked, and the fluorescent sensing layer comprises three paper chips, the simultaneous fluorescence detection of chloride ions, glucose and pH of sweat is realized. The Janus membrane with the directional water conveying capacity is used as a substrate for preparing a micro-fluidic chip. In one aspect, sweat may be automatically delivered to an analysis zone along a designed path. On the other hand, sweat is transferred from a hydrophobic membrane close to the skin to a hydrophilic membrane, sweat accumulation is effectively avoided, and a comfortable skin microenvironment is promoted. A Janus membrane-based micro-fluidic chip is combined with fluorescence sensing, a micro-fluidic fluorescence sensor based on a Janus membrane is constructed, and simultaneous high-stability and high-accuracy analysis of multiple targets in human sweat is realized.

The invention relates to the technical field of fabrics, and discloses a preparation method of an anti-wrinkle comfortable fabric, which comprises the following steps: by taking alkyl diamine, acrylonitrile, gamma-chloropropyl methyl dimethoxy silane and the like as raw materials, carrying out addition reaction, hydrolysis reaction and quaternization reaction to obtain polycarboxyl disilane gemini quaternary ammonium salt; octamethylcyclotetrasiloxane, polycarboxyl disilane gemini quaternary ammonium salt and the like are used as raw materials, quaternary ammonium salt modified polysiloxane is obtained through base catalysis copolymerization, then the quaternary ammonium salt modified polysiloxane is emulsified and prepared into finishing liquid, pure cotton fabric is soaked in the finishing liquid, and the anti-wrinkle comfortable fabric is obtained through two-dipping and two-rolling finishing. The crease resistance of the fabric is improved by utilizing a large number of amino groups and carboxyl groups contained in the finishing liquid, and the antibacterial property of the fabric is improved by utilizing a quaternary ammonium salt structure contained in the finishing liquid. Experiments prove that the prepared fabric has good crease-resistant comfort performance and antibacterial performance.

The invention discloses a preparation method and application of a tension sensor for monitoring cortisol in sweat. According to the scheme, on the basis of a stretchable electrode (SWNTs / PDMS) which is prepared by patterning in a manner that a single-walled carbon nanotube is subjected to suction filtration and transfer printing on polydimethylsiloxane, cortisol is used as an imprinting molecular template by utilizing an electrochemical deposition technology, and Prussian blue (PB) and pyrrole (Py) are electrically polymerized to prepare an electrochemical sensor of a molecularly imprinted polymer (MIP), so that the change of the concentration of cortisol in sweat can be monitored in real time; a reliable and practical method is provided for rapid and pressure-free pressure monitoring. A scanning electron microscope is used for electrode modification morphology characterization, and an electrochemical workstation is used for electrode sensing performance characterization. The sensor realizes the function of dynamically monitoring the day and night change rule of cortisol in sweat, and has the characteristics of real-time detection, high sensitivity and selectivity and good stability.

The invention discloses a double-layer microneedle patch and a preparation method thereof.The preparation method of the double-layer microneedle patch comprises the following steps that firstly, 3D printing is conducted through polydimethylsiloxane, and a PDMS mold similar to a machining microneedle is obtained; dispersing the medicine into the sericin solution to serve as an outer layer solution; dispersing germanium nanoparticles into the polycaprolactone solution to obtain an inner layer solution; and finally, adding the outer-layer solution into the needle-shaped groove of the PDMS mold, so that the needle-shaped groove is filled with the outer-layer solution, drying, adding the inner-layer solution, drying, and demolding to obtain the double-layer microneedle patch. When the double-layer microneedle patch is used for drug delivery, drugs can be dissolved and released in a short time, the inner layer is polycaprolactone (PCL) carrying photo-thermal agent germanium nanoparticles, degradation is slow, a photo-thermal effect is generated under irradiation of 808nm near-infrared light, residual tumor cells are induced to die immunogenicity, an immune microenvironment is programmed in a time sequence, and the double-layer microneedle patch has the advantages of being high in sensitivity, high in sensitivity and good in stability. Postoperative recurrence and metastasis of tumors are efficiently inhibited, and meanwhile operative wound repair is promoted.

The invention relates to the technical field of metal surface protection, and discloses a corrosion-resistant self-repairing metal fastener and a preparation method thereof.The corrosion-resistant self-repairing metal fastener comprises a zinc alloy matrix, a nanometer passivation layer, a slow-release corrosion-resistant layer and a self-repairing functional layer, and the nanometer passivation layer, the slow-release corrosion-resistant layer and the self-repairing functional layer sequentially wrap the zinc alloy matrix; the zinc alloy matrix consists of Al, Cu, Mg, Ce and Zn; the nano passivation layer adopts zinc phosphate / silane composite sol to construct a Si-O-P covalent bond network, and plasma is combined to graft epoxy groups to enhance the interface bonding strength; the slow-release anti-corrosion layer is used for loading a pH response type benzotriazole derivative through gradient aperture mesoporous silica, so that the dynamic controlled release of a corrosion inhibitor is realized; the self-repairing functional layer adopts a synergistic effect of a mechanical triggering type sulfydryl siloxane microcapsule and a pH triggering type EDTA chelating agent microcapsule to form a physical plugging-chemical passivation dual-mode repairing mechanism. Through four-stage cooperation of matrix modification, interface strengthening, slow-release regulation and control and intelligent repair, the corrosion resistance of the corrosion-resistant self-repairing metal fastener in a complex environment is remarkably enhanced.

The invention discloses a fingerprint-resistant coating of a chromium-plated part and a preparation method of the fingerprint-resistant coating, and belongs to the technical field of metal material plating surface treatment. Comprising the following steps: carrying out hydrolysis reaction on an organic siloxane coupling agent to obtain silane coupling agent hydrolysate; mixing and reacting the silane coupling agent hydrolysate, levodopa, an EDC hydrochloride reagent and a DMAP reagent to obtain modified levodopa; soaking the pretreated chromium-plated part in modified levodopa, taking out the pretreated chromium-plated part, soaking the pretreated chromium-plated part in a methacrylate solution, and polymerizing to obtain a polymethacrylate-poly-levodopa-chromium-plated part; and the polymethacrylate-poly-levodopa-chromium-plated part is soaked in a silver salt solution, and the fingerprint-resistant coating of the chromium-plated part is obtained. According to the method, the poly-levodopa adhesion layer is constructed on the surface of the chromium-plated part according to the molecular bionics principle, then the poly-levodopa is further polymerized to generate the polymethacrylate protection layer, and finally the fingerprint resistance of the chromium-plated part is improved through further coordination crosslinking of the silver salt solution.