155 results about "Polydimethyl siloxane" patented technology

The invention belongs to the technical field of angle sensors, and particularly relates to a tilt angle sensor and a preparation method and application thereof. The tilt angle sensor provided by the invention comprises a base body and a micro-channel communicated with any two points in the base body, the micro-channel is filled with gallium-based alloy liquid, the surface of the micro-channel contains a plurality of bulges, and the average height of the bulges is 50-200 microns; the two ends of the micro-channel are sealed by conductive adhesive; the conductive adhesive is connected with the electrode; the matrix is prepared from polydimethylsiloxane. The micro-channel containing the micron-sized bulge structure is arranged in the base body, so that local capillary force gradient can be generated, and the body response speed of the gallium-based alloy liquid is accelerated; and meanwhile, the special structure of the micro-channel has directional textures, so that asymmetric flow resistance and multi-path conductive paths can be generated, and differential resistance changes are generated during inclination to realize multi-directional inclination angle detection. The detection sensitivity and the anti-noise capability of the tilt angle sensor are remarkably improved by inducing a nonlinear flow control effect through the bulges in the micro-channel.

The invention discloses a UV-cured high-weather-resistance optical thin film and a preparation method thereof, and relates to the technical field of optical thin films. The optical film is prepared by taking polyethylene glycol terephthalate as a base material and coating the base material with a UV curing coating, and the UV curing coating comprises the following raw materials in parts by weight: 15-20 parts of aliphatic polyurethane acrylate, 5-8 parts of perfluorobutyl ethyl acrylate, 8-12 parts of hydroxyethyl acrylate, 6-10 parts of 1, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 1-3 parts of 1, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 1-3 parts of 1, 2, 4-trimethyl-1, the invention relates to a UV (ultraviolet)-resistant coating which is prepared from the following raw materials in parts by weight: 1-2 parts of 2, 6-hexanediol diacrylate, 5-8 parts of trimethylolpropane triacrylate, 30-40 parts of modified epoxy acrylate, 1-2 parts of a silane coupling agent KH-570, 2-3 parts of a photoinitiator 1173, 0.5-1.2 parts of a modified ultraviolet absorbent UV-327, 0.8-1.5 parts of a hindered amine light stabilizer 540, 0.3-0.8 part of an antioxidant 1010, 0.09-0.12 part of an ultraviolet absorbent Tinuvin400 and 0.2-0.5 part of polyether modified polydimethylsiloxane. According to the UV-cured high-weather-resistance optical thin film, polyethylene glycol terephthalate is used as a base material, key raw materials such as a UV-cured coating with a scientific formula, modified epoxy acrylate and the like are finely prepared, a two-stage curing process is adopted, and the weather resistance is excellent.

The invention belongs to the technical field of rubber sealing rings, and particularly discloses a wading rubber sealing ring and a preparation method thereof, the wading rubber sealing ring comprises the following components by weight: 60-70 parts of modified ethylene propylene diene monomer, 35-50 parts of modified white carbon black, 20-30 parts of hydrogenated nitrile rubber, 0-10 parts of fluororubber, 2-5 parts of polyester fiber, 0.5-3 parts of an anti-hydrolysis agent, and 1-3 parts of a hydrophobic agent. 2-4 parts of an antimicrobial agent, 3-5 parts of an anti-aging agent and 1-7 parts of sulfur; the anti-hydrolysis agent is a mixture of tetrakis [beta-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol ester and a carbodiimide anti-hydrolysis agent; the hydrophobic agent is a mixture of polydimethylsiloxane and perfluorooctyltriethoxysilane, and the hydrophobic agent is a mixture of polydimethylsiloxane and perfluorooctyltriethoxysilane. The wading rubber sealing rubber ring and the preparation method thereof are suitable for fresh water and warm water scenes, and have wide application prospects in ship sealing and sewage treatment equipment in seawater and industrial wastewater scenes.

The invention discloses a defoaming agent for industrial automobile paint and a preparation method of the defoaming agent. The defoaming agent is prepared from the following raw materials in parts by mass: 20-40 parts of a star block polyether-siloxane copolymer; 10 to 25 parts of nano hydrophobic silicon dioxide aerogel; 30-70 parts of an alkylbenzene solvent (boiling point gt: 200 DEG C); 3 to 8 parts of epoxy group modified polyether siloxane; and 1 to 3 parts of polyether modified polydimethylsiloxane. The molecular weight range of the star block polyether-siloxane copolymer can effectively balance the defoaming property and compatibility, the siloxane chain segment of the star block polyether-siloxane copolymer destroys the elasticity of a foam film, and the siloxane chain segment cooperates with alkylbenzene to reduce local surface tension and accelerate foam rupture. The polyether chain segment and the siloxane chain segment have a synergistic effect, and the polyether chain segment adjusts hydrophilicity to adapt to different environments.

The invention belongs to the technical field of cosmetics, and particularly relates to a slow-release permeation-enhancing composition based on a water-in-oil system as well as a preparation method and application of the slow-release permeation-enhancing composition. The slow-release permeation-enhancing type composition is prepared from the following components in parts by weight: 1 to 6 parts of polydimethylsiloxane PEG-10 / 15 cross-linked polymer, 0.1 to 2 parts of PEG-10 polydimethylsiloxane, 2 to 15 parts of polydimethylsiloxane, 2 to 15 parts of glycerol tri (ethylhexoic acid) ester and 0.01 to 2 parts of squalane. The sustained-release permeation-promoting composition has excellent wrapping capacity on active ingredients, oxidation and decomposition of the active ingredients are reduced, and therefore the activity retention rate of the active ingredients is remarkably increased. Moreover, the composition formed by the specific compound components has unique molecular structure and physical properties, and a wrapping system of the composition can effectively control the release rate of the active components, so that the durability and effectiveness of the application effect of the composition are improved, and the permeation promoting effect of the composition is further enhanced.

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 discloses high-temperature-resistant silicone rubber and a preparation method thereof, and belongs to the field of polymer compositions. The silicone rubber is composed of vinyl-terminated polydimethylsiloxane, fumed silica, hydroxyl silicone oil, a hydrogen-containing silicone oil cross-linking agent, a platinum catalyst, an inhibitor methyl butynol, cerium oxide and zinc oxide whiskers. During preparation, vinyl siloxane and 1 / 2 of white carbon black are subjected to vacuum banburying for 40 min at the temperature of 155 DEG C, the remaining white carbon black and hydroxyl silicone oil are added to be mixed for 50 min at the temperature of 125 DEG C, other components are sequentially added after cooling, and vulcanization is conducted at the temperature of 170 DEG C * 15 MPa. The shore A hardness of the obtained silicone rubber is greater than or equal to 63, the retention rate of elongation at break is greater than or equal to 485%, the retention rate of tensile strength after aging at 350 DEG C for 72 hours is greater than or equal to 86%, the thermal weight loss is 5%, the temperature is greater than or equal to 476 DEG C, the Mooney viscosity is less than or equal to 47, and the silicone rubber has excellent processability and high-temperature stability.

The invention belongs to the technical field of bionic cilium sensors, and particularly discloses a magnetic bionic cilium and vesicle complex and a preparation method and application thereof.The preparation method comprises the following steps that S1, a cilium array male mold is prepared; then carrying out oxygen plasma treatment, silanization and curing stabilization; s3, injecting the magnetic composite precursor into a polydimethylsiloxane female die, applying pressure, and striking off; and S4, coating the mold surface with an Ecoflex precursor, performing thermocuring forming, performing magnetization treatment, and performing stripping to obtain the magnetic bionic cilia. According to the magnetic bionic cilia, the vesicle complex and the preparation method and application of the magnetic bionic cilia, the vesicle complex and the preparation method and application of the magnetic bionic cilia, high-magnetic signal output is achieved while the deformability of the cilia is guaranteed, the magnetic bionic cilia is used for non-contact real-time hemodynamic monitoring, meanwhile, specific response release of the vesicle complex is achieved, and a new thought is provided for design of responsive vascular implants.

The invention discloses a preparation process of a flexible stretchable surface electromyographic motion sensing integrated electrode, and particularly relates to the field of flexible electronic technology and biomedical engineering.The electrode adopts thermoplastic polyurethane or polydimethylsiloxane as a substrate material, and conductivity and fatigue resistance are improved through doping of graphene quantum dots. The electrode comprises a myoelectricity sensing layer and a motion sensing layer, wherein the myoelectricity sensing layer is constructed through electrostatic spinning of a TPU nanofiber net and spraying of liquid metal, and the motion sensing layer forms a snakelike microcrack structure through silk-screen printing of a silver nanowire / TPU mixed material. The honeycomb-shaped insulating layer is used for isolating bimodal signals, and long-acting antibiosis and air permeability are achieved in combination with the self-repairing adhesion layer. After packaging, a Bluetooth 5.0 chip and a miniature lithium battery are integrated, and wireless signal transmission is supported.

The invention relates to a micro-fluidic chip for chemiluminescence imaging detection of single-cell secretions and a use method of the micro-fluidic chip. The micro-fluidic chip is composed of a single cell analysis layer and a glass substrate layer. The single cell analysis layer is prepared from polydimethylsiloxane and is provided with a capture channel, a sample introduction channel and a lantern-shaped microstructure array, the lantern-shaped microstructure comprises a small-size cell capture trap and a large-size chemiluminescence detection chamber, the small-size cell capture trap is connected with the capture channel, and the large-size chemiluminescence detection chamber is connected with the sample introduction channel. After a mixed solution of cells and a detection reagent is introduced into the capture channel, single cell capture is realized on the capture trap due to flow resistance difference; then, introducing air into the capture channel and the sample introduction channel to form a gas-in-liquid microcavity, and carrying out single cell isolation and incubation reaction; finally, the signal switch molecules and the substrate liquid are sequentially injected into the chemiluminescence detection chamber through the sample injection channel, and quantitative detection is conducted on the single-cell secretions according to chemiluminescence imaging signals.

The invention relates to the field of printing ink, and particularly discloses water-based silk-screen printing oil, an applied water-based silk-screen printing protective film and a construction technology of the water-based silk-screen printing oil. The water-based silk-screen printing oil is prepared from the following raw materials: water, filler, a film-forming agent, polydimethylsiloxane dispersion liquid, polyamide wax, a polyether siloxane copolymer, an amine neutralizer and a resin matrix; the resin matrix is a mixture of water-based polycarbonate resin or water-based polyurethane resin and water-based soft polyurethane resin; the invention also discloses a water-based silk-screen protective film prepared from the water-based silk-screen ink through a silk-screen process, and also discloses a construction process of the water-based silk-screen protective film, and the construction process comprises the following steps: respectively preparing a primer and a finish paint; the preparation method comprises the following steps: respectively preparing a primer and a finish paint, mixing, carrying out silk-screen drying to form a primer layer, mixing the finish paint with a water-based high-temperature-resistant curing agent, and carrying out silk-screen to form a finish paint layer. The preparation method has the characteristic of preparing the environment-friendly high-temperature-resistant strippable water-based silk-screen printing ink.

The invention provides a preparation method of high-selectivity single-ended vinyl silicone oil, which comprises the following steps: adding a hydroxyl-terminated polydimethylsiloxane linear body into low-viscosity dimethyl silicone oil, uniformly mixing, adding linear phosphonitrile chloride for catalysis, and vacuumizing to remove water; continuously raising the temperature, adding a viscosity reduction catalyst, mixing a tetramethyl divinyl disiloxane double-end sealing agent, a dimethyl vinyl ethyoxyl silane single-end sealing agent and low-viscosity dimethyl silicone oil, dropwise adding the mixture into the reaction kettle, keeping the temperature, balancing, vacuumizing, and further removing water; then adding a hexamethyldisilazane neutralizing agent to carry out neutralization treatment; and after the neutralization is completed, entering a low-boiling-point removal process, carrying out reduced pressure distillation to remove low-boiling-point substances, and thus obtaining single-end vinyl polydimethylsiloxane. The single-ended vinyl silicone oil is applied to mold silica gel of liquid silicone rubber and can replace low-viscosity dimethyl silicone oil, the product hardness is adjusted, the oil seepage rate of the silicone oil is reduced, and the oil seepage phenomenon commonly existing in the industry is improved.

The application discloses a kind of flame-retardant mildew-proof prepolymer, transparent flame-retardant mildew-proof silicone sealant and preparation method thereof.The flame-retardant mildew-proof prepolymer is prepared from raw materials including the following components by weight: mildew-proof agent 0.5-10 parts, flame retardant 20-50 parts, tackifier composition 0.2-2 parts;The tackifier composition is composed of alkyl acetoacetate, trimethylsilyl ethyl acetate, 3-isocyanate propyl trimethoxysilane and polyether silicone oil.The transparent flame-retardant mildew-proof silicone sealant is prepared from raw materials including the following components: alkyl alkoxy-terminated polydimethylsiloxane, white carbon black, the flame-retardant mildew-proof prepolymer, crosslinking agent, catalyst, coupling agent.The transparent flame-retardant mildew-proof silicone sealant prepared by the application not only has very high transparency, but also has excellent flame-retardant effect, long-lasting mildew-resistant and antibacterial properties, and good bonding stability and mechanical strength.

The application provides a silicone sealant not prone to discoloration and a preparation method thereof, and relates to the technical field of silicone sealants. The silicone sealant comprises the following components in parts by weight: 100 parts of hydroxyl-terminated polydimethylsiloxane, 70-130 parts of fillers, 0-20 parts of dimethyl silicone oil, 5-12 parts of a crosslinking agent, 1-3 parts of a coupling agent oligomer, 0.5-3 parts of an epoxy coupling agent and 0.01-0.5 parts of a catalyst. The application adopts a customized amino coupling agent oligomer with a specific structure, and optimizes the formula to achieve optimal effects by matching 107 glue, fillers and the like at a proper ratio. The application can improve the poor high-temperature tensile bonding property and the discoloration under high temperature of the existing silicone sealant, realizes good high-temperature bonding property and is not prone to discoloration, and in particular, the discoloration phenomenon under high-temperature application scenarios is obviously improved, thereby meeting the high requirements in special building, automobile, electronic and electrical applications and the like.

The application relates to a preparation method of a Zn-MOF derivative carbon-based super-hydrophobic wave-absorbing textile, which is prepared by immersing the textile in a mixed solution of silicone and Zn-MOF derivative carbon, and then sequentially performing padding, pre-drying and baking to obtain the Zn-MOF derivative carbon-based super-hydrophobic wave-absorbing textile; the silicone is hexadecyl trimethoxysilane, gamma-methacryloyloxypropyl trimethoxysilane, polydimethylsiloxane or polydimethylhydroxysiloxane; the Zn-MOF derivative carbon has a regular polyhedral structure and a diameter of 50-500 nm; the minimum reflection loss of the Zn-MOF derivative carbon is-20 to-50 dB; the water contact angle of the Zn-MOF derivative carbon-based super-hydrophobic wave-absorbing textile is not lower than 150.7 degrees, and the minimum reflection loss is not higher than-21.2 dB; the preparation method is simple, and the prepared product has super-hydrophobic and wave-absorbing properties.

This invention belongs to the field of catalyst technology, and discloses a high-efficiency platinum catalyst, its preparation method, and its application. The preparation of the high-efficiency platinum catalyst of this invention includes mixing and stirring a Karstedt catalyst, a ligand, and a catalyst, adding vinyl-terminated polydimethylsiloxane, and fully dissolving it to obtain the high-efficiency platinum catalyst. The obtained catalyst is used to prepare filler-free flame-retardant silicone rubber, which comprises the following raw materials in parts by weight: 80-100 parts vinyl-terminated polydimethylsiloxane, 2-4 parts crosslinking agent, 2-10 parts of the high-efficiency platinum catalyst of this invention, and 0.2-0.3 parts polymerization inhibitor. This invention provides a novel modified platinum catalyst for silicone rubber, which enhances the anti-sintering properties of Pt at high temperatures through the nitrogen-containing carbene ring and the Pt ligand, thereby improving the flame-retardant properties of silicone rubber brought by the platinum catalyst.

The invention discloses a high-flexibility stretchable clustered gold nano array film and a preparation method and application thereof. The high-flexibility stretchable clustered gold nano array film comprises an elastic flexible substrate modified with an amino functional group and gold nanowires vertically arranged on the surface of the elastic flexible substrate in a one-dimensional mode. The one-dimensional gold nanowires are of a cluster array structure formed by multi-branch gold nanostar induced self-growth, and the arrangement direction is perpendicular to the surface of the substrate. The preparation method comprises the following steps: oxidizing the surface of the polydimethylsiloxane substrate to generate hydroxyl; the treated polydimethylsiloxane substrate is immersed in a 3-aminopropyl triethoxy silane solution, and then the polydimethylsiloxane substrate and the 3-aminopropyl triethoxy silane solution are subjected to ultrasonic treatment; ligand-free gold nanostars synthesized by adopting a seed mediation method are attached to the surface of polydimethylsiloxane under the action of Au-N covalent bonds; placing the polydimethylsiloxane film modified by the gold nanostars in a growth solution to induce growth of the gold nanowires so as to form a cluster array; cleaning and drying to obtain a final film; when the prepared cluster-shaped gold nano array film is applied to a sensor, capturing of tiny physiological signals can be achieved.

The invention discloses a double-component room-temperature curing acetone-removing type organic silicon sealant and a preparation method thereof, and belongs to the technical field of polymer sealing materials, the sealant comprises a component A and a component B. The component A comprises alpha, omega dihydroxy polydimethylsiloxane, an acid-resistant reinforcing filler and a thixotropic filler, and the component B comprises a component A and a component B. The component A comprises alpha, omega dihydroxy polydimethylsiloxane, an acid-resistant reinforcing filler and a thixotropic filler. The component B comprises alkoxy-terminated polydimethylsiloxane, an acid-resistant reinforcing filler, a thixotropic filler, a heat-resistant filler, carbon black, a deacetonized cross-linking agent, a silane coupling agent and a catalyst. In particular, the invention also provides a preparation method of the alkoxy-terminated polydimethylsiloxane. The heat resistance of a deacetone silica gel system with excellent heat resistance is further improved and optimized, meanwhile, the requirements for rapid curing and attractive appearance of the microwave oven glue are met, the mixing volume ratio of the two components is 1: 1 during use, the requirement for equipment metering precision is low, and automatic equipment gluing of a gluing robot is facilitated.

A pixel array and a method of manufacturing the same, the pixel array including a pixel sensor and a polydimethylsiloxane layer over the pixel sensor, wherein a surface of the polydimethylsiloxane layer includes a plurality of structures, each structure having an individual width that is less than a wavelength of an incident light to be sensed by the pixel sensor.

The invention relates to a multi-concentration flow-rate-controllable micro-fluidic chip for zebra fish preference behavior analysis. The micro-fluidic chip comprises a glass base layer and a polydimethylsiloxane layer, wherein the upper part of the polydimethylsiloxane layer contains an integrated chip structure. The chip structure comprises a first chip for controlling concentration gradient, a second chip for realizing dynamic regulation and control of flow velocity and a third chip for observing zebra fish behaviors, and the three chips are connected in sequence to analyze zebra fish preference behaviors. According to the invention, a three-chip integrated design is adopted, and the first chip generates fluids with various concentrations by using a concentration gradient generator with uniform hierarchy distribution; the second chip is provided with a permanent magnet in a fluid channel, an equal-flow-resistance path is constructed, and path switching and the flow proportion of fluid with different concentrations are adjusted to control the flow speed; the symmetrical cavity structure of the third chip enables the concentration-flow velocity combined fluid to be uniformly distributed, and a multi-region environment gradient is formed. The design overcomes the limitation of single regulation and control in the prior art, can cooperatively regulate and control the concentration and the flow velocity, simulates a multi-factor coupling scene, and expands the zebra fish preference behavior research dimension and reliability.

The invention relates to the technical field of cosmetics, in particular to a composite silicon elastomer composition, a base cosmetic and a preparation method of the base cosmetic. The silica gel comprises the following components: silica, polymethylsilsesquioxane, a siloxane cross-linked polymer and isododecane. Through the mutual synergistic effect of specific composite silicon elastomer compositions, the mass ratio of the silica to the polymethylsilsesquioxane to the siloxane cross-linked polymer to the isododecane is controlled to be (0.5-1.5): (1-2): (0.6-1): (1.5-2); the mass ratio of the polydimethylsiloxane to the vinyl polydimethylsiloxane cross-linked polymer to the vinyl polydimethylsiloxane to the polymethylsiloxane silsesquioxane cross-linked polymer is (0.3-0.5): (0.3-0.5), so that the soft coke performance is remarkably improved, the pore effect is effectively improved, and the soft coke effect is improved. The problem that the soft focusing effect, the skin feeling improvement and the cost reduction cannot be considered at the same time in the existing makeup technology is solved.

The invention relates to the technical field of fluorosilicone resin water cups. The fluorosilicon resin composite material is prepared from the following raw materials in parts by weight: 50 to 70 parts of hydroxyl-terminated polydimethylsiloxane, 10 to 20 parts of tetraethoxysilane, 25 to 35 parts of perdecafluorooctyltriethoxysilane, 5 to 15 parts of phenyltrimethoxysilane, 10 to 20 parts of xylene, 3 to 8 parts of an additive and 1 to 2 parts of dibutyltin dilaurate. According to the invention, ryegrass contains natural antibacterial ingredients of flavones and phenols, lignin and phenol in the powder also have antibacterial properties, phenolic hydroxyl groups of phenol can be combined with bacterial proteins to denature the proteins and inhibit bacterial growth, and benzyltriethylammonium chloride in the base material is added, so that bacteria can permeate to interfere the metabolism of the bacteria, and the antibacterial property of the powder is improved. Silver ions and quaternary ammonium salt can be slowly released through the resin matrix, the antibacterial effect is maintained for a long time, and the antibacterial performance of the fluorosilicone resin composite material water cup is improved.

The invention discloses a rodlike carbon nitride-polydimethylsiloxane composite coating and a preparation method and application thereof.The rodlike carbon nitride-polydimethylsiloxane composite coating is prepared by mixing rodlike carbon nitride filler, polydimethylsiloxane and a curing agent, and even doping of the rodlike carbon nitride filler can effectively improve the crosslinking density of the composite coating; the adhesive force and the tensile strength of the coating are enhanced; when the composite coating is applied to the surface of a matrix, a multifunctional nano coating with mechanical reinforcement, long-acting corrosion prevention and microbial antifouling characteristics can be formed, the impedance arc radius is kept at 5.17 * 10 < 9 > omega.cm < 2 > after the composite coating is soaked for 60 days, and the composite coating shows excellent bacteriostasis and sterilization performance on chlorella and escherichia coli; the excellent biological pollution prevention characteristic is shown.

The invention provides a microalgae cell swelling inertia screening and impedance detection integrated micro-fluidic device, and relates to the technical field of microalgae cell screening and detection. The microalgae cell swelling inertia screening and impedance detection integrated micro-fluidic device comprises a signal processing unit, the substrate is ITO (Indium Tin Oxide) conductive glass; the main micro-channel is of a micro-channel structure which is formed in a polydimethylsiloxane (PDMS) layer and is bonded on the substrate. According to the invention, the passive sorting module based on the expansion and contraction inertia effect and the differential impedance detection module are integrated in the single micro-fluidic chip, so that the full-process automation of'sample introduction-sorting-detection-output 'is realized. Sample loss, cross contamination and activity damage are avoided, interference of mixed cell populations on subsequent impedance signals is effectively eliminated through pre-sorting, and the accuracy of target microalgae detection is remarkably improved.

This invention relates to the field of textile technology and discloses a method for preparing a nano-silver antibacterial and deodorizing ultra-soft sofa fabric. The fabric includes a fiber substrate and a three-dimensional polymer coating in situ cross-linked on its surface. The finishing working solution uses water as a solvent and contains branched polyethyleneimine, nano-silver dispersion, terminal epoxy-modified polydimethylsiloxane, and glacial acetic acid. During solution preparation, glacial acetic acid is used to adjust the pH to 4.5–5.0, causing the polyamine groups to protonate and form a kinetic dormancy state, ensuring stability at room temperature. After padding, a three-stage gradient baking process is performed, where the bound acetic acid is desorbed and vaporized upon heating, restoring the active amine groups to undergo in-situ ring-opening addition cross-linking with the terminal epoxy groups. Polyethyleneimine anchors the nano-silver through multi-toothed chelation, and epitaxial siloxane segments form a comb-like hydrophobic isolation layer. This invention inhibits metal-catalyzed yellowing of the fabric, significantly improves the wash fastness of the antibacterial components, and imparts an excellent soft touch to the fabric through molecular-level lubrication.

The utility model discloses a polydimethylsiloxane sensitization optical fiber temperature and strain simultaneous measurement sensor. The sensor comprises an incident optical fiber, an optical fiber coupler, an optical fiber patch cord, a transmission optical fiber, a sensing cavity, a reference cavity and an emergent optical fiber, an optical signal enters the optical fiber coupler through the incident optical fiber and is divided into two beams of equal-intensity light in the coupler, the two beams of light are respectively input into the transmission optical fiber through the optical fiber patch cord and then enter the sensing cavity and the reference cavity which are coated with the polydimethylsiloxane, and the light is reflected by the cavities to form interference; the interference light is transmitted back to the optical fiber coupler through respective transmission optical fibers, so that a vernier spectrum is formed; the emergent optical fiber transmits an optical signal containing temperature strain information to a spectrograph, trough drift is analyzed through a dual-wavelength matrix demodulation method, and simultaneous measurement is achieved. According to the utility model, the vernier effect, the structural advantages of the Fabry-Perot interferometer and the advantage of high thermo-optic coefficient of polydimethylsiloxane are combined, and the vernier interferometer has the advantages of low cost, high sensitivity, high stability and the like.

Present invention describes a commercial manufacturing process of a stable emulsion having particle size (D50 value) up to 1000 nanometer and up to 3000 ppm of cyclosiloxane(s) comprises providing a formulation comprising a mixture of two or more organopolysiloxane first emulsifying using a mixture of non-ionic and neutralized anionic emulsifier and undergoing emulsion polymerization below 12° C. by a non-neutralized anionic emulsifier and then neutralizing the emulsion by alkali to a pH range 6-8.

The present invention relates to hexamethylcyclotrisiloxanes for use in an equilibrium reaction with at least one poly (methyl hydrogen) siloxane in the presence of at least one equilibrium catalyst to form poly (methyl hydrogen)-polydimethylsiloxane copolymers. It has been found that a content of at least 0.5 wt% hexamethylcyclotrisiloxane can reduce equilibrium reaction time to provide a statistically uniform distribution of SiH functional groups of the poly (methyl hydrogen)-polydimethylsiloxane copolymer. The prepared poly (methyl hydrogen)-polydimethylsiloxane copolymer can be used for preparing polyether polydimethylsiloxane, and can be used as a stabilizer of polymer foam such as polyurethane foam.

A kind of flexible optical fiber Fabry-Perot interference type ultrasonic sensor, high sound transmission package shell is provided with optical fiber ultrasonic sensing structure, optical fiber ultrasonic sensing structure is single mode optical fiber one end and is provided with flexible probe, the material of the flexible probe is polydimethylsiloxane, single mode optical fiber other end extends outside package shell, the flexible probe is cylinder, axial through hole is arranged in the center of flexible probe, the axial through hole of flexible probe is provided with sound transmission body away from single mode optical fiber one end, the cavity between the sound transmission body and single mode optical fiber end face is Fabry-Perot air cavity.The optical fiber ultrasonic sensing structure of the present application adopts single mode optical fiber one end and is provided with flexible probe, with the characteristics of high transmittance, low thermal conductivity, can eliminate the temperature cross sensitivity influence of sensor, the sensor of the present application is passive device, and the anti-electromagnetic interference ability is strong, with the advantages of small size, light weight, meet the measurement requirements of narrow space.

The invention belongs to the technical field of multifunctional fabric manufacturing, and particularly relates to a flame-retardant, antibacterial and hydrophobic cotton-polyester blended fabric and a preparation method thereof. A simple padding and baking method is adopted, polyethyleneimine, guanidine phosphate and boric acid are compounded to serve as functional finishing liquid to conduct padding on the fabric, then hydrophobic polymer spraying liquid is adopted for spraying, and the flame-retardant function, the antibacterial function and the hydrophobic function are successfully integrated into the cotton-polyester blended fabric. The polyethyleneimine effectively fixes the guanidine phosphate and the boric acid on the fabric, the guanidine phosphate and the boric acid can play an efficient phosphorus-nitrogen-boron synergistic flame-retardant role during combustion, formation of a compact carbon layer is promoted, and meanwhile efficient broad-spectrum antibiosis is achieved. The polydimethylsiloxane is attached to the surface of the cotton-polyester blended fabric, water molecules are difficult to spread on the surface of the cotton-polyester blended fabric, the lower flame-retardant / antibacterial layer is physically protected, the loss of the lower flame-retardant / antibacterial layer in washing or friction is reduced, the fabric is endowed with washable and wear-resistant hydrophobicity, the process is simple, the energy consumption is low, and the production efficiency is improved.