303 results about "Polydimethyl siloxane" patented technology

The invention relates to a contact main guide field enhanced flexible capacitive pressure sensor and a preparation method thereof, the contact main guide field enhanced flexible capacitive pressure sensor comprises an elastomer composite electrode and a composite dielectric layer, the elastomer composite electrode is formed by compounding an elastomer electrode and a metal electrode, the elastomer electrode is an elastomer prepared from polydimethylsiloxane and a carbon nanotube composite material, a multi-scale microstructure is formed on the outer surface, facing the composite dielectric layer, of the elastomer electrode, and the metal electrode is a metal layer evaporated on the surface of the multi-scale microstructure; the composite dielectric layer is formed by compounding an inorganic metal oxide dielectric layer and an organic dielectric layer in an upper and lower layer structure. The contact dominant field enhanced flexible capacitive pressure sensor provided by the invention has the characteristics of relatively high sensitivity, relatively high linear responsivity, relatively wide sensing range and relatively good mechanical stability, and is wide in application prospect.

The invention relates to the technical field of silicone rubber preparation, in particular to high-flame-retardant insulating liquid silicone rubber and a preparation method and application thereof. The high-flame-retardant insulating liquid silicone rubber is prepared from the following raw materials in parts by mass: 60 to 75 parts of vinyl-terminated polydimethylsiloxane, 5 to 8 parts of methylhydrosiloxane, 20 to 24 parts of a flame retardant, 0.1 to 0.2 part of a platinum catalyst, 25 to 30 parts of modified silicon dioxide and 2 to 3 parts of a silane coupling agent, and the flame retardant is prepared by mixing decabromodiphenyl ethane and modified magnesium hydroxide. The high-flame-retardant insulating liquid silicone rubber not only has excellent flame retardance, insulativity, high-temperature-resistant stability and the like, but also has remarkable advantages in mechanical properties and environmental adaptability, and provides safer and more reliable material choices for related fields.

The invention provides silicone rubber and a preparation method thereof. The invention provides silicon rubber. The silicon rubber is prepared from the following raw materials: vinyl-terminated polydimethylsiloxane, vinyl MQ silicon resin, an adhesion promoter, titanium dioxide, polymethylhydrosiloxane and a reaction inhibitor. The preparation method of the silicone rubber comprises the following steps: in the presence of a catalyst, mixing a mixture of vinyl-terminated polydimethylsiloxane and vinyl MQ silicon resin, an adhesion promoter, titanium dioxide, polymethylhydrosiloxane and a reaction inhibitor to obtain the silicone rubber. The silicone rubber disclosed by the invention has high reflectivity, low thixotropy, high fluidity, high heat resistance and storage stability, and is relatively simple in production process and suitable for industrial production.

The invention provides a preparation method of a high-adhesion transparent self-healing super-smooth coating. Polydimethylsiloxane is taken as a matrix, a three-arm type dynamic hydrogen bond network structure is constructed, and 2-ureido-4-pyrimidone (UPy unit) is taken as a crosslinking node to be connected with a siloxane main chain, so that the crosslinking density and the interface binding energy are remarkably improved. According to the invention, a UPy unit is innovatively introduced into a main chain or a side chain to construct two topological structures of (SUP) 2TD or (MUP) 2TD. Compared with (MUP) 2TD, the (SUP) 2TD shows excellent tensile property and self-healing property in both air and underwater environments. The enhancement of this performance is attributed to the improvement of chain displacement capability in (SUP) 2TD. Through interface dynamics, a UPy unit is guided to an interface and interacts with an interface group, and a very strong adhesion effect is obtained. In addition, the coating shows excellent self-healing performance.

The invention discloses a biaxial flexible strain sensor based on laser induced graphene. Comprising a flexible substrate, a flexible sensitive layer, a flexible spacing layer and a flexible upper cover, both the flexible substrate and the flexible upper cover are made of a polydimethylsiloxane (PDMS) material, the flexible sensitive layer is generated on a mixed substrate of polyimide (PI) and multi-walled carbon nanotubes (MWCNTs) through a laser ablation process, and then the sensitive layer is transferred to the PDMS substrate through a substrate transfer process. The flexible sensitive layer adopts an I-shaped structure, and two ends of the flexible sensitive layer are coated with electrode layer external wires. The method can be applied to the fields of wearable electronic equipment and medical monitoring. By means of the I-shaped structure, the sensitive layers in different directions can detect the strain in the main direction, and meanwhile interference caused by the strain in different directions is avoided. The preparation method is simple and efficient, a special gas environment is not needed, patterning preparation of graphene can be completed only through one step, and the production cost is reduced.

The invention relates to the technical field of power cables, in particular to an insulation protection tube which comprises a wire tube, and the outer wall of the wire tube is wrapped with a braided layer braided and wound by heterogenous aramid fibers, namely a heterogenous aramid braided layer; the heterogenous aramid fiber braid layer is also wrapped with a braid layer woven and wound by carbon fibers, and the braid layer is called as a carbon fiber braid layer; curing the wire tube wrapped with the anisotropic aramid fiber braid layer and the carbon fiber braid layer; the outside of the carbon fiber braid layer is coated with fixing glue; fixing glue with a polydimethylsiloxane component is adopted as the fixing glue; the fixing glue is doped with a fragment-shaped glass fiber net, and the fragment-shaped glass fiber net is used as a filler; the glass fiber net comprises a net body and expanded glass fibers; the net body is formed by weaving warp yarns and weft yarns; the warps and the wefts are made of glass fibers; the pressure resistance, corrosion resistance, wear resistance and insulation performance of the pipe are improved, and ultraviolet ray irradiation can be blocked.

The invention relates to the field of hair dyeing products, in particular to a low-irritation essential oil hair dye and a preparation method thereof. The invention relates to a low-irritation essential oil hair dye, which comprises a No.1 agent and a No.2 agent, the No.1 agent comprises a humectant, a hair coloring agent, an antioxidant, a chelating agent and a solvent A; a thickening agent A, an emulsifier A and a hair conditioner; a pH regulator A, and polydimethylsiloxane; the disinfectant is prepared from an aromatic A, polyquaternium-7, polyquaternium-10, argania spinosa kernel oil, a camellia extract, a ginger root extract and a preservative; the agent 2 comprises a solvent B, cetearyl trimethyl ammonium chloride, sodium stannate and a pH regulator B; a thickener B, an emulsifier B and mineral oil; a chelating agent C; and an oxidant. The hair dye provided by the invention can reduce irritation under the condition of ensuring the hair dyeing effect and relieve the frizz degree of dyed hair, and has a plurality of advantages.

The invention relates to the technical field of concrete materials, and discloses a hydrophobic antibacterial material, a preparation method and environment-friendly hydrophobic antibacterial concrete. The preparation method of the hydrophobic antibacterial material comprises the following steps: enabling 2, 3-dihydroxy terephthalic dihydrazide to react with 3-hydroxy-4-methoxybenzaldehyde to obtain an intermediate product, and then enabling the intermediate product to react with terephthaloyl chloride and 1, 2-epoxyoctane in sequence to obtain a multifunctional agent; carrying out load modification on the multifunctional agent to obtain a modified multifunctional agent; performing surface treatment on the modified multifunctional agent to obtain an aminated modified multifunctional agent; the amination modified multifunctional agent is treated with functionalized polydimethylsiloxane, and a composite multifunctional agent is obtained; the composite multifunctional agent and the modified composite nano material are combined to obtain a hydrophobic antibacterial material, and the hydrophobic antibacterial material is added into concrete to obtain the environment-friendly hydrophobic antibacterial concrete. The environment-friendly hydrophobic antibacterial concrete disclosed by the invention has good antibacterial performance, hydrophobic anti-seepage performance and self-repairing performance.

The invention belongs to the technical field of membrane separation, and relates to a self-repairing type polydimethylsiloxane pervaporation membrane based on disulfide dynamic covalent bonds, which is prepared by adding 4, 4 '-diaminodiphenylmethane into epoxy-terminated polydimethylsiloxane in a nitrogen atmosphere. Self-repairing type polydimethylsiloxane pervaporation membrane material prepared by curing interpenetrating network formed by physically blending disulfide dynamic covalent bond-based self-repairing type polydimethylsiloxane obtained by reflux reaction of dichloromethane solution of 4, 4 '-dithiodiphenylamine and methacrylate-based polydimethylsiloxane and coating polyvinylidene fluoride with self-repairing type polydimethylsiloxane pervaporation membrane material and an ethylene supporting layer. When the pervaporation membrane is subjected to external damage, especially when the pervaporation membrane is scratched by solid substances in the separation process, the pervaporation membrane does not need to be replaced, the repairing function can be achieved only through external heating, no additional solvent is needed in the repairing process, and the method can be used for separating butanol.

The invention 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. By combining the vernier effect, the structural advantages of the Fabry-Perot interferometer and the advantage of high thermo-optical coefficient of the polydimethylsiloxane, the invention has the advantages of low cost, high sensitivity, high stability and the like.

The invention relates to the field of cosmetics, and discloses makeup fixing cream and a preparation method thereof. The makeup fixing cream comprises the following components in percentage by mass, comprising 3.0%-20% of diisostearyl malate, 0.5%-8.0% of microcrystalline wax, 0.5%-5.0% of petrolatum, 0.1%-3.0% of squalane, 0.1%-5.0% of pentaerythritol tetraisostearate, 30%-60% of polydimethylsiloxane, 3%-6% of polymethylsilsesquioxane, 15%-40% of modified silica and 3%-5% of vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane cross-linked polymer. 15% of a silane coupling agent and 3-15% of a vinyl polydimethylsiloxane / polydimethylsiloxane cross-linked polymer; the modified silica is of a porous structure, and the surface of the modified silica is modified by polydimethylsiloxane. After being used, the makeup fixing cream has the characteristics of matte and soft-focus effects and good makeup maintaining and oil controlling effects.

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 relates to the field of electronic paste, and provides high-performance electronic paste based on a graphene composite material and a preparation method of the high-performance electronic paste. The slurry comprises a surface modified graphene / silicon carbide nanowire hybrid, a carbon-coated silver nanorod, epoxy resin, a polyamide curing agent, a KH-550 coupling agent, polyvinylpyrrolidone, fumed silica, polyether modified polydimethylsiloxane and a compound solvent. By constructing a multi-scale conductive network and an interface enhancement structure, excellent conductivity and shear strength of the slurry are realized. The preparation method comprises the steps of in-situ synthesis and surface modification of the graphene hybrid filler, deposition preparation of the carbon and silver nanorods, and a multi-stage dispersion compounding process of all the components under specific temperature control and shearing conditions, and finally the electronic paste which is stable in structure and excellent in performance is formed and is suitable for scenes such as high-reliability electronic packaging and conductive bonding.

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 SiC-ZrC complex-phase continuous ceramic fiber and a preparation method of the SiC-ZrC complex-phase continuous ceramic fiber. The preparation method comprises the following steps: cracking polydimethylsiloxane to obtain a mixed product, mixing the mixed product with an organic metal reagent for thermal polymerization, cooling to obtain a head product, dissolving the head product, filtering, and carrying out reduced pressure distillation to obtain a precursor; adding the precursor into a spinning cylinder, heating for standing and defoaming, and then cooling for melt spinning to obtain a fibril; putting the fibril into a tubular furnace for heating, and meanwhile, introducing boron trichloride for curing to obtain a cross-linked filament; and putting the cross-linked wire into a tubular furnace, reacting according to a heating program, preserving heat, cooling to obtain an initial fiber, and heating in a sintering furnace to obtain the ceramic fiber. The prepared precursor is controllable in softening point, uniform in molecular weight distribution and excellent in spinning performance, boron is introduced in the non-melting process, and the fiber density and the high-temperature oxidation resistance of the fiber are greatly improved.

The invention provides a self-repairing material containing a dynamic hindered thiourea bond as well as a preparation method and application of the self-repairing material. The self-repairing material containing the dynamic hindered thiourea bond is prepared from the following raw materials: polydimethylsiloxane, a diisothiocyanate compound, anhydrous piperazine and an optional amine cross-linking agent. The molar ratio of the four components is (3-4): 6: 2: (0-0.7); wherein the two ends of the polydimethylsiloxane are terminated by amino alkyl. A self-repairing material formed by polydimethylsiloxane, a diisothiocyanate monomer, anhydrous piperazine and an optional amine cross-linking agent according to a specific molar ratio is adopted, and a dynamic hindered thiourea bond is introduced into a polymer material, so that the self-repairing material is endowed with repairing capacity under the condition that the insulating property of the self-repairing material is not sacrificed; the self-repairing material not only has good insulating property and mechanical property, but also has excellent self-repairing property.

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 superfine polyester yarn, and particularly discloses a preparation process of superfine denier special-shaped polyester yarn. Comprising the following steps: (1) mixing polyester chips, modified nano bentonite, polydimethylsiloxane, nano zirconium oxide, maleic anhydride grafted polyethylene, modified pottery clay and polyethylene wax powder, stirring at 80-85 DEG C for 30-35 minutes, melting at 240-280 DEG C to obtain a melt, and spinning to obtain cellosilk; (2) cooling and solidifying the cellosilk at the temperature of 20-22 DEG C through cross air blowing to obtain cooled cellosilk; and (3) oiling the cooled cellosilk, and coiling and forming to obtain the superfine denier profiled polyester yarn. The prepared superfine denier special-shaped polyester yarn has good strength and wear resistance, fibers are not prone to breakage in the spinning process, and the quality and durability of the fibers are guaranteed.

The invention relates to the technical field of composite materials, and discloses an epoxy resin composite material based on flexible chain segments and rigid fiber particles and a preparation method, the preparation method comprises the following steps: step 1, adding thionyl chloride SOCl2 into a cellulose nanofiber CNF solution, fully mixing, and reacting to obtain a chlorinated cellulose nanofiber CNF-Cl solution; 2, fully mixing the CNF-Cl solution and the aramid nanofiber ANF solution, adding a silane coupling agent, fully mixing and reacting, and removing the solvent to obtain the silane functionalized cellulose nanofiber modified aramid nanofiber fANF (at) CNF; and 3, adding the fANF (at) CNF into an epoxy resin EP matrix containing epoxy functionalized polydimethylsiloxane E-PDMS, fully mixing, adding a curing agent and an accelerant, and carrying out vacuum degassing and curing to obtain the required composite material. According to the composite material obtained by the invention, the strength, toughness and thermal performance of the epoxy composite dielectric are synergistically improved.

The invention belongs to the technical field of electromagnetic shielding materials and conductive polymer-based composite materials, and particularly relates to a flexible aramid nanofiber conductive film and a preparation method and application thereof. The preparation method comprises the following steps: firstly, preparing an aramid nanofiber membrane through vacuum-assisted filtration, and then immersing the aramid nanofiber membrane into a nickel ion-containing solution for ultrasonic pretreatment and activation treatment by a sodium borohydride solution to obtain a modified aramid nanofiber membrane; and mixing with a chemical nickel plating solution under an external magnetic field, drying, and dip-coating with a polydimethylsiloxane packaging solution to obtain the flexible aramid nanofiber membrane. The finally obtained flexible aramid nanofiber conductive film has excellent flexibility, heat resistance and corrosion resistance. The method is easy to operate, economical and environmentally friendly, the material has excellent electromagnetic shielding performance due to the porous layered structure of the formed nanofiber membrane and the nickel coating on the surface, and the problem of mutual interference between electronic elements can be solved.

The invention discloses a hydrogel modified microelectrode array device and a preparation method thereof, the hydrogel modified microelectrode array device comprises a microelectrode array composite layer, a passivation layer, a hydrogel layer and a cell culture ring, the cell culture ring is arranged on the microelectrode array composite layer, and the passivation layer and the hydrogel layer are located in the cell culture ring; the microelectrode array composite layer comprises a microelectrode array with polydimethylsiloxane as a base material, at least part of the microelectrode array in the cell culture ring is exposed, and at least part of gaps of the exposed microelectrode array are filled with the passivation layer; the hydrogel layer grows on the surface of the polydimethylsilane, and a microgroove is formed in the exposed microelectrode array and passivation layer area to serve as a cell growth area. According to the invention, cell patterning can be realized on the microelectrode array, cell electrophysiological activity can be monitored for a long time, and the microelectrode array has the advantages of remarkable cell patterning promotion capability, high stability and robustness, flexible cell pattern design, excellent biological compatibility and simple process.

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 provides a preparation method of a pump-free SERS (Surface Enhanced Raman Scattering) micro-fluidic chip for detecting mi RNA (Ribonucleic Acid) related to liver cancer and the pump-free SERS micro-fluidic chip. The method comprises the following steps: 1) preparing 20nm gold particles (AuNPs) by adopting a sodium citrate reduction method; 2) respectively modifying Raman signal molecules DTNB and 4-MBA and nucleic acid complementary chains H1 and H2 on AuNPs to prepare AuNPs (at) DTNB (at) H1 and AuNPs (at) 4-MBA (at) H2; (3) modifying the surface of the magnetic core Fe3O4 with nucleic acid aptamers cDNA (complementary deoxyribonucleic acid) 1 and cDNA 2 of the mi R-21 and the mi R-155 to obtain Fe3O4 (at) cDNA 1 and Fe3O4 (at) cDNA 2 (Fe3O4 (at) cDNA); (4) the AuNPs (at) DTNB (at) H1 and the AuNPs (at) 4-MBA (at) H2 prepared in the step (2) are coupled with the Fe3O4 (at) cDNA prepared in the step (3), and Fe3O4 (at) cDNA-AuNPs (at) Raman report (at) H is obtained; and 5) mixing polydimethylsiloxane (PDMS) with a curing agent, adding the mixture into the template to prepare a micro-fluidic chip, and carrying out hydrophilic treatment to construct the pump-free SERS micro-fluidic chip. The method has the advantages of high sensitivity, high specificity, high detection speed and the like.

The invention discloses a low-carbon cement concrete steam curing reinforcing agent and application thereof, the reinforcing agent for high-iron phase cement clinker is obtained through screening, and the reinforcing agent can adapt to a steam curing process and rapidly improve the early strength and the final strength of a concrete member. The reinforcing agent comprises the following components in parts by weight: 0.5-5 parts of nano calcium carbonate, 0.02-0.2 part of an alcohol amine additive, 0-2 parts of inorganic salt and 0.01-0.2 part of a surfactant, the alcohol amine additive is selected from diethanolisopropanolamine, monoethanolisopropanolamine, triethanolamine and triisopropanolamine, the inorganic salt is selected from aluminum sulfate, sodium metaaluminate, sodium chloride, sodium sulfate and calcium chloride, and the surfactant comprises at least one of polydimethylsiloxane, fluorosiloxane and ethylene glycol siloxane. According to the invention, by adjusting the temperature system and reinforcing agent components before steam curing, the problem of effect reduction caused by combination of an alcohol amine reinforcing agent and a steam curing process is reversed, so that the reinforcing agent and the steam curing process generate a synergistic effect.

The preparation process comprises the following steps: performing vacuum dehydration on alpha, omega-divinyl polydimethylsiloxane and phenyl siloxane under the protection of inert gas to prepare a basic rubber material; then adding the modified nano silicon dioxide filler in batches in a gradient manner, and dispersing at a stepped rotating speed to form a uniformly mixed sizing material; then polycarbonate powder treated by a silane coupling agent is introduced for high-speed dispersion to form a component A precursor, and after the component A precursor is mixed with a component B containing a hydrogen silicone oil cross-linking agent / platinum catalyst, the self-adhesive silicone rubber with high interface bonding force is prepared by adopting a stepped temperature procedure; according to the method, the bonding strength of polycarbonate powder is improved through gradient filler dispersion in batches, the tensile strength of the material is improved through silane treatment, the curing reaction rate is matched with the interface wetting speed through a stepped curing procedure, the strength is kept while rapid curing is conducted, and the effects of high bonding strength and rapid curing are effectively achieved.

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

The invention relates to the technical field of silicone adhesives, in particular to a silicone sealant containing natural fibers, and a preparation method and application thereof. The silicone sealant containing natural fibers comprises 80-90 parts of alkoxy-terminated polydimethylsiloxane, 30-50 parts of plasticizer, 15-35 parts of filler, 3-8 parts of crosslinking agent, 1.5-3.5 parts of curing accelerator, 0.5-1 part of catalyst, 0.5-1 part of coupling agent, 0.5-2 parts of stabilizer, 4-5.5 parts of natural fibers, 3-6 parts of dispersant and 1-2 parts of reversible swelling material, wherein the natural fibers are used to form an irregular three-dimensional network in the silicone sealant to reduce the occurrence of debonding; the curing accelerator constructs micropores, and the reversible swelling material makes it difficult for rainwater to enter indoors through the micropores or gaps; and the preparation method of the silicone sealant containing natural fibers comprises the steps of soaking the natural fibers in the dispersant to obtain a mixture, and respectively adding the mixture while adding the plasticizer, the crosslinking agent, the filler and the reversible swelling material to reduce the aggregation of the natural fibers.

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.