690 results about "Silsesquioxane" patented technology

The invention belongs to the technical field of fiber materials, and particularly relates to a modified aramid nanofiber as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) preparing an aramid nanofiber dispersion liquid; (2) modifying the aramid nanofiber by using POSS; and (3) carrying out in-situ polymerization on polypyrrole on the surface of the aramid nanofiber. POSS (polyhedral oligomeric silsesquioxane) has a relatively large volume exclusion effect, the template effect of long-chain alkyl quaternary ammonium salt can be influenced by scattered adhesion of POSS on the surface of aramid nanofiber, uneven polymerization of pyrrole monomers is caused, and formation of a rough structure on the surface of the fiber is facilitated. According to the invention, the polypyrrole-coated aramid nanofiber with a coarse structure is used as a polyolefin modified material, so that the problem of low interfacial force existing in a common filler is solved, and the polyolefin resin composite material with high strength and antistatic property is obtained and can be widely applied to the fields of pipes, plates, grouting equipment parts, grouting bags and the like.

The invention relates to the technical field of heavy anti-corrosion coatings, in particular to a graphene enhanced epoxy modified organic silicon resin heavy anti-corrosion powder coating. The coating is prepared from the following components in parts by weight: 42 to 58 parts of epoxidized epoxy modified organic silicon resin, 0.8 to 2.5 parts of hydroxylated graphene, 6 to 11 parts of nano zirconium dioxide coated boron nitride, 2.5 to 5.5 parts of lanthanum iso-octoate-titanate composite coupling agent, 1.5 to 3.5 parts of bis (3-triethoxysilylpropyl) disulfide, 4 to 7 parts of polyhedral oligomeric silsesquioxane, 5 to 8 parts of curing agent, 0.8 to 1.8 parts of flatting agent and 0.4 to 0.9 part of defoaming agent. 2.5 to 4.5 parts of polyether-ether-ketone micro powder and 1.2 to 2.8 parts of fluorine-containing phosphate ester. According to the invention, the resin is modified through chemical bridging, the modified graphene and the nano-coated powder are matched to construct a synergistic enhancement system, and the interface bonding is optimized by the composite coupling agent. The coating is excellent in adhesive force, corrosion resistance and mechanical property, good in processing fluidity and high in aging resistance and thermal stability, solves the problem that a traditional product is short in performance, and meets the industrial requirement.

The invention discloses a transparent composition photoresist with low shrinkage and low vacuum deflation. Comprising the following raw materials in percentage by mass: 1-5% of modified polyhedral oligomeric silsesquioxane (POSS), 1-5% of an expanding monomer, 1-5% of modified acrylic resin, 1-5% of epoxy resin, 1-5% of a thiol cross-linking agent, 1-5% of an initiator, 0.1-3% of a curing accelerator, 0.2-0.5% of a flatting agent, 0.1-5% of a silane coupling agent, 0.01-0.2% of an antioxidant and 80-90% of an electronic-grade organic solvent. The invention also provides a preparation method of a cured coating prepared from the transparent composition photoresist with low shrinkage and low vacuum deflation. The product provided by the invention not only can maintain the properties of high hardness, high thermal stability, high planarization ability, high barrier property, low hygroscopicity, low dielectric constant and the like of the transparent composition photoresist coating, but also can enable the transparent composition photoresist coating to have excellent low shrinkage and low outgassing, thereby achieving the purposes of saving energy, reducing emission, reducing cost and improving efficiency; the low shrinkage of the transparent composition photoresist coating also widens the development of the material in the fields of other panel production processes such as OLED (Organic Light Emitting Diode) and the like.

The invention relates to the technical field of insulating materials, in particular to insulating powder and a preparation method thereof. The invention discloses a flame-retardant coating which comprises the following components in parts by weight: 15-25 parts of epoxy resin, 10-20 parts of aluminum hydroxide, 5-12 parts of nano boron nitride, 1-3 parts of a silane coupling agent KH-560, 3-8 parts of polytetrafluoroethylene micro powder, 2-6 parts of fluorine-modified montmorillonite, 4-9 parts of melamine cyanurate, 2-5 parts of nano titanium dioxide, 1-4 parts of a fluorine-modified graphene oxide-polyaniline composite material and 0.5-2 parts of pentaerythritol stearate. The anti-corrosion coating is prepared from the following components in parts by weight: 1 to 3 parts of nano zinc oxide, 5 to 10 parts of glass fiber, 2 to 5 parts of polyhedral oligomeric silsesquioxane-polyimide copolymer, 1 to 4 parts of ferrocenyl epoxy resin and 0.5 to 2 parts of perfluorooctyltriethoxysilane. The insulation powder is high in corrosion resistance, excellent in insulation, heat dissipation and mechanical performance, environmentally friendly in processing, good in adaptability, capable of prolonging the service life of equipment and reducing the cost, suitable for special environments and wide in popularization prospect.

The invention provides a high-temperature-resistant corrosion-resistant cable material for a control line and a preparation method of the high-temperature-resistant corrosion-resistant cable material, and belongs to the field of metallocene polyolefin materials. The cable material is prepared from the following chemical raw materials: 45 to 65 parts of maleic anhydride grafted metallocene polyolefin, 5 to 10 parts of maleic anhydride grafted polyolefin elastomer, 3 to 6 parts of epoxy group modified polyhedral oligomeric silsesquioxane, 2 to 5 parts of polyether amine, 5 to 10 parts of ion response type core-shell structure sustained release microspheres, 8 to 15 parts of multi-dimensional reinforcement, 15 to 25 parts of halogen-free flame retardant, 0.5 to 1.5 parts of antioxidant and 0.5 to 1.5 parts of processing aid. The chemical raw materials with specific functions are accurately selected, a synergistic effect system is constructed, and meanwhile, the high temperature resistance and corrosion resistance of the cable material for the control line are improved.

The invention relates to the technical field of coatings, in particular to an acrylate-epoxy resin composite coating and a preparation method thereof. According to the technical scheme, the coating is prepared from 25 to 35 parts of methyl methacrylate, 15 to 25 parts of butyl acrylate, 10 to 20 parts of epoxy resin E-5110, 8 to 15 parts of organic silicon modified acrylate prepolymer, 5 to 12 parts of fluorocarbon modified epoxy resin, 4 to 8 parts of core-shell structure corrosion inhibition nano container, 1 to 3 parts of functionalized graphene quantum dots and 4 to 10 parts of polyhedral oligomeric silsesquioxane maleimide modified amine curing agent. And 1-3 parts of a hindered amine light stabilizer. By integrating the core-shell structure corrosion inhibition nano container, the functionalized graphene quantum dots and the photo-thermal dual responsive curing agent component, the sensing, response and self-repairing of the coating on damage are realized, and long-acting corrosion resistance, weather resistance, bacteria resistance, mechanical property balance and intelligent maintenance are considered; and efficient and economical full-period protection is provided for equipment in an extreme environment.

This invention discloses a PETG co-extruded composite sheet and its preparation method. The method involves adding extruder and APET masterbatch to an extruder, then layering and combining the extruder melt and APET masterbatch melt to form a composite melt with an upper and lower layer of extruder and a middle layer of APET masterbatch. This is then shaped by roller pressing to obtain the PETG co-extruded composite sheet. During the blending process of modified polyester and modified filler, the epoxy group structure in the modified polyester molecule can react with the secondary amine in the modified filler, resulting in mild cross-linking and increasing the strength of the polyester material. The modified polyester molecular chain contains polysiloxane segments, and also has polysiloxane segments branched onto its side links. When impacted, the flexible polysiloxane segments absorb and dissipate a large amount of energy through violent movement, rotation, and entanglement. Furthermore, the nano-reinforcing points formed by the cage-like silsesquioxane structure within the molecule contribute to the excellent scratch resistance of the prepared composite sheet.

The invention discloses a preparation method and application of a reproducible self-healing polyurethane elastomer with synergism of dynamic silicon oxygen bonds and multiple hydrogen bonds. The method comprises the following steps: (1) carrying out a pre-polymerization chain extension reaction on polytetrahydrofuran, isophorone diisocyanate and a catalyst; (2) adding a 3, 13-dihydroxy propyl octaphenyl double-layer silsesquioxane monomer to carry out a chain extension reaction, and then adding carbohydrazide to carry out a reaction; and (3) adding glycerol and camphorsulfonic acid, uniformly stirring, pouring into a mold, curing and drying, thereby obtaining the reproducible self-healing polyurethane elastomer with synergistic dynamic silicon-oxygen bonds and multiple hydrogen bonds. According to the invention, a common fabric is soaked in a dispersion liquid formed by uniformly mixing diluted polyurethane and hydrophobically modified MXene to obtain the multifunctional composite material with the functions of self-cleaning, self-repairing, photo-thermal conversion and human body sensing.

The invention belongs to the field of high polymer materials, and discloses a POSS (Polyhedral Oligomeric Silsesquioxane) modified monomer as well as a preparation method and application thereof. According to the POSS modified monomer, a vinyl POSS (T8-POSS) basic framework with a T8 structure is adopted, a hydrophobic perfluoroalkyl chain (SF) and a thermosensitive benzocyclobutenyl (Si-B) unit are introduced to an inorganic cage, when the POSS modified monomer is subjected to thermocuring to form a multifunctional coating, a hybrid network structure can be constructed by adjusting the content of the SF and the content of the Si-B unit, and therefore the multifunctional coating is formed. The effects of controlling the optical, mechanical, thermal and surface wettability of the coating are achieved, and the coating has high mechanical strength and environment barrier efficiency. Meanwhile, the invention also discloses a preparation method of the POSS modified monomer and a coating prepared from the POSS modified monomer.

The invention belongs to the field of functional textile materials, and provides a one-way moisture-conducting breathable fabric based on a vinyl elastomer and a preparation method of the one-way moisture-conducting breathable fabric based on the vinyl elastomer. The hydrophilic coating contains a vinyl elastomer matrix, polyvinyl alcohol, a zwitterionic polymer and a cross-linking agent, the hydrophobic coating contains a vinyl elastomer matrix, vinyl-terminated polydimethylsiloxane, polyhedral oligomeric silsesquioxane and other components, the coatings are only attached to the surfaces of yarn fibers and do not block pores, and a wettability gradient structure is formed; the excellent performance that the static contact angle gradient in the thickness direction is larger than or equal to 50 degrees, the capillary water absorption height from the inner side to the outer side is larger than or equal to 3.0 cm / 10 min, the capillary water absorption height from the outer side to the inner side is smaller than or equal to 1.0 cm / 10 min, the moisture permeation amount is larger than or equal to 5000 g.m.24 h, and the air permeability after curing is 65% or above of a fabric base material is achieved, the technical problem that an existing fabric is insufficient in moisture conductivity and air permeability is solved, and wide application value is achieved.

The present application discloses a kind of dispersing fast, low turbidity, high temperature and high pressure resistant, strong acid and strong alkali defoaming agent, which is prepared from the following components: 5-50% of white carbon black silica paste, 1-25% of capped polyether modified polysiloxane, 0.1-10% of spherical poly siesquioxane, 1-25% of compound polyether, 0.1-10% of thickening agent, 0.05-0.5% of sterilizing agent, and the balance of water, wherein the sum of the weight percentages of the components is 100%. The present application also provides a production process of the defoaming agent, which comprises the following steps: stirring the white carbon black silica paste, spherical poly siesquioxane and capped polyether modified polysiloxane with a homogenizer to mix them thoroughly, then adding the compound polyether, thickening agent and sterilizing agent, stirring them uniformly, and continuing to stir them rapidly with the homogenizer for 25-35 minutes to obtain the mixed uniform polyether modified polysiloxane defoaming agent. The purpose of the present application is to provide a defoaming agent with fast dispersion speed, low turbidity, high temperature and high pressure resistance, and strong acid and strong alkali resistance.

The invention relates to the technical field of coatings, in particular to an antistatic film material and a preparation method thereof.The antistatic film material comprises a film base material layer and a photocuring antistatic coating coated on the film base material layer, and the film base material layer is a polyethylene glycol terephthalate film; the light-cured antistatic coating is prepared from the following raw materials: water-soluble polyurethane acrylic resin, water-soluble acrylic resin, modified polyhedral oligomeric silsesquioxane, a composite conductive material, a photoinitiator, a flatting agent, a defoaming agent and water; the modified polyhedral oligomeric silsesquioxane and the composite conductive material are added into the coating base material to modify the coating base material, the coating has excellent antistatic performance and good mechanical property after being cured by ultraviolet light, and the special structure of the composite conductive filler and the compounding of the composite conductive filler and the modified polyhedral oligomeric silsesquioxane have excellent antistatic performance and good mechanical property. The anti-static performance reduction caused by low humidity and organic matter migration is avoided.

The invention discloses a preparation method of corona-resistant oil-water-resistant low-dielectric polyimide. The preparation method comprises the following steps: S1, dissolving a fluorine-containing diamine monomer in an organic solvent; s2, adding an anhydride monomer into the diamine monomer solution obtained in the step S1 to obtain a polyamide acid solution, adding inorganic nanoparticles, and uniformly stirring; s3, adding methacryloyloxy propyl cage type polysilsesquioxane into the solution obtained in the step S2 to obtain polyimide slurry; the ratio of the total molar weight of the anhydride monomer to the total molar weight of the diamine monomer is (0.8-1.2): 1, the total solid content of the sum of the anhydride monomer and the diamine monomer in the solution is 5-50wt%, the proportion of the nanoparticles in the total solid content of the solution is 0.5-30wt%, and the proportion of the methacryloyloxy propyl cage type polysilsesquioxane in the total solid content of the solution is 0.5-30wt%. According to the preparation method of the low-dielectric polyimide, the corona resistance and oil-water resistance of a polyimide material are improved, and meanwhile, the dielectric constant of the material is reduced. The invention also provides the low dielectric polyimide.

The invention relates to the technical field of foaming materials, in particular to a shoe material preparation process for finished shoes based on supercritical physical foaming and the finished shoes. The preparation method comprises the following steps: 1) weighing a matrix, octadecyl polyhedral oligomeric silsesquioxane, an active group-containing styrene-acrylonitrile copolymer, a polydimethylsiloxane block copolymer, an epoxy functional group-containing olefin copolymer, a nano silicon dioxide dispersion and a processing aid, uniformly mixing, blending, extruding, granulating and drying to obtain a blended material, wherein the matrix, the octadecyl polyhedral oligomeric silsesquioxane, the active group-containing styrene-acrylonitrile copolymer, the polydimethylsiloxane block copolymer, the epoxy functional group-containing olefin copolymer, the nano silicon dioxide dispersion and the processing aid are mixed uniformly; the preparation method comprises the following steps of (1) preparing a polymer, (2) plasticizing the blended material to form a preformed blank, injecting supercritical gas, and fully dissolving the supercritical fluid in the polymer at the temperature of 150-180 DEG C and the pressure of 10-20MPa for 1-3 hours, (3) reducing the pressure to normal pressure within 10 seconds at the pressure reduction rate of less than or equal to 2MPa / s, and (4) cooling and shaping at the temperature of 60-80 DEG C to obtain the shoe material.

The invention discloses a natural resin adhesive, a production method and application in paper-plastic composite packaging, and belongs to the technical field of adhesives, raw materials adopt bio-based rosin resin and amber resin as main materials and polyimide resin containing antioxidant modified polysilsesquioxane as an auxiliary material, and the requirements of green and environmental protection are met. The adhesive has excellent ultraviolet shielding function, can meet the requirement of long-time adhesion of packaging without aging in paper-plastic composite packaging, and structurally contains rigid structures of polysilsesquioxane and titanium-based MOF, so that the overall strength of the adhesive can be improved, cracking and stripping are avoided, and the adhesive has high adhesive strength. And the porosity of the polysilsesquioxane and the titanium-based MOF can improve the heat dissipation capability of the adhesive.

The invention discloses a production method of a high-barrier BOPA film. The BOPA film comprises a surface layer, a middle layer and an inner layer, and the surface layer is composed of PA6, MXD12 and polyhedral oligomeric silsesquioxane; the middle layer is prepared from PA6, aliphatic polyketone and graphene oxide nylon master batch; the inner layer is composed of PA6, organically modified vermiculite, POE-g-MAH, an ethylene-vinyl alcohol copolymer and an antioxidant. The BOPA film prepared by the invention has the advantage of high barrier and has better mechanical properties.

The invention relates to the technical field of organic-inorganic hybrid materials, in particular to an antifouling organic-inorganic hybrid material, a preparation method, a photocuring antifouling material and a product. The organic-inorganic hybrid material is prepared by carrying out a ring-opening addition reaction on an epoxy group of epoxy polyhedral oligomeric silsesquioxane and polydimethylsiloxane with an amino group or perfluoropolyether with a carboxyl group. According to the scheme provided by the invention, the coating has high thermal stability and structural rigidity endowed by epoxy polyhedral oligomeric silsesquioxane and excellent low surface energy antifouling property endowed by amino-containing polydimethylsiloxane or carboxyl-containing perfluoropolyether, and the defect that a pure epoxy polyhedral oligomeric silsesquioxane coating does not have antifouling property is effectively overcome.

The invention relates to the field of sealing materials, in particular to a heat-resistant and oil-resistant sealing gasket for an engine and a preparation method of the heat-resistant and oil-resistant sealing gasket. The liquid silicone rubber is prepared from the following raw materials in percentage by weight: 60-80% of a liquid silicone rubber base material, 15-28% of an oil-resistant heat-resistant base material, 0.1-3% of a cross-linking agent, 0.1-0.6% of a catalyst and the balance of a processing aid, the oil-resistant and heat-resistant base material is prepared from an inorganic filler, aramid pulp, polyhedral oligomeric silsesquioxane-alcoholic hydroxyl group, an activation dispersant and a double-active-group-epoxy silane coupling agent; the activation dispersant is a trihydroxymethyl caprolactone cross-linked polymer and / or bis (pinacol) borate; and the inorganic filler is composed of a plurality of components selected from fumed silica powder, nano-scale ceramic powder and zinc borate nano-powder. The oil-resistant and heat-resistant base material obtained by the scheme interacts with the silicone rubber base material, so that the prepared heat-resistant and oil-resistant sealing gasket for the engine has better comprehensive performance.

The invention discloses high-wear-resistance HFBMA (hexafluorobutyl methacrylate) acrylic resin and a preparation method thereof. The high-wear-resistance HFBMA acrylic resin is prepared from the following components in percentage by mass: 30 to 40 percent of styrene, 8 to 15 percent of hydroxypropyl ester, 8 to 15 percent of propyl butyl ester, 0.3 to 1.5 percent of methacrylic acid, 0.5 to 2 percent of initiator, 3 to 10 percent of hexafluorobutyl methacrylate (HFBMA), 2 to 8 percent of organic silicon monomer or POSS (polyhedral oligomeric silsesquioxane) and 25 to 35 percent of xylene. According to the experiment, the optimal raw material composition and proportion are obtained through screening of a large number of experiments, the optimal synthesis process is obtained through optimization of a large number of experiments, and the conversion rate reaches 98.8% or above. The acrylic resin disclosed by the invention has excellent wear resistance, weather resistance, chemical resistance, high hardness, high adhesive force and excellent hydrophobicity and anti-fouling performance, and the comprehensive performance is remarkably and technically improved.

The invention belongs to the field of organic-inorganic hybrid materials, and discloses a high-temperature-resistant polyhedral oligomeric silsesquioxane material and a preparation method thereof. According to the high-temperature-resistant polyhedral oligomeric silsesquioxane material, polyimide serves as a main chain, aminopropyl hepta-isobutyl polyhedral oligomeric silsesquioxane serves as a side chain, and a hybrid system with a clear structure is formed through chemical bonding. The obtained high-temperature-resistant polyhedral oligomeric silsesquioxane material has both the toughness of polyimide and the high-temperature stability of a cage structure, is high in thermal decomposition temperature, and is suitable for the fields of high-temperature-resistant coatings, electronic packaging, aerospace and the like. According to the method, the raw materials are low in price, wide in source channel and low in toxicity, and the obtained product is high in purity and excellent in performance and has good actual use value.

The invention relates to the field of cables, and discloses a flame-retardant extruded and insulated low-voltage power cable, which comprises a conductor core, an insulating layer, a filling layer, an inner sheath layer, an armor layer and an outer sheath layer, and is characterized in that the sheath layer is made of low-density polyethylene, ethylene propylene diene monomer, ethylene-tetrafluoroethylene copolymer, modified halloysite nanotubes, modified ammonium polyphosphate and auxiliaries; the modified halloysite nanotube is prepared by loading titanium dioxide on the surface of a halloysite nanotube by using a sol-gel method and then grafting octa-aminopropyl polyhedral oligomeric silsesquioxane; the modified ammonium polyphosphate is prepared by grafting a functional silane coupling agent prepared by reacting a cyclotriphosphazene derivative with 3-chloropropyltrimethoxysilane with polysiloxane-coated ammonium polyphosphate, and the cyclotriphosphazene derivative is prepared by reacting 3-amino-1, 2, 4-triazole with hexachlorocyclotriphosphazene and then coordinating with cobalt ions by adopting a hydrothermal method. Therefore, the material is endowed with good mechanical properties, ultraviolet resistance, heat and wear resistance, flame retardance and antibacterial activity.

The invention provides toughened epoxy resin for a carbon fiber epoxy prepreg and a preparation method of the toughened epoxy resin, and relates to the technical field of high polymer material preparation. The preparation method comprises the steps of aminating phenyl polymethylsiloxane, modifying epoxy resin and preparing toughened epoxy resin. And aminating phenyl polymethylsiloxane: mixing phenyl trimethoxy silane, 3-aminopropyltriethoxysilane and a diluent, dropwise adding a catalyst, and adjusting the pH value after a reaction to obtain the amino-containing phenyl polymethylsiloxane. The epoxy resin is modified, wherein phenyl polymethylsiloxane containing amino groups and polyhedral oligomeric silsesquioxane are used as modifiers. And preparing toughened epoxy resin: mixing the modified epoxy resin, solid epoxy resin, a diluent, a curing agent and a flame retardant. The toughened epoxy resin prepared by the invention maintains a high glass transition temperature while toughening, and optimizes the interlaminar shear strength and flexural modulus of the carbon fiber epoxy prepreg.

The invention belongs to the technical field of composite material manufacturing, and particularly relates to a POSS (Polyhedral Oligomeric Silsesquioxane) grafted polyimide flexibilizer and toughened modified cyanate ester resin as well as a preparation method and application thereof. Polyimide is grafted and modified through POSS, the POSS grafted polyimide flexibilizer is prepared, toughening modification of cyanate ester resin is achieved through cooperation of a molecular chain flexible structure of polyimide and a cage-shaped structure of nanoparticles of POSS, and the toughness of the cyanate ester resin is improved; meanwhile, the dielectric property and the mechanical property of the cyanate ester resin are improved, and the toughening modified cyanate ester resin keeps good heat resistance.

The invention relates to the field of pipes, and discloses a high-flame-retardance MPP cable protection pipe and a preparation method thereof.The cable protection pipe comprises polypropylene resin, modified graphene oxide, modified maleic anhydride grafted polypropylene and auxiliaries; the modified graphene oxide is prepared by grafting a modified benzotriazole intermediate and a double-bond DOPO derivative substituted cyclotriphosphazene derivative into graphene oxide; the modified benzotriazole intermediate is prepared by grafting 2-(2, 4-dihydroxyphenyl)-2H-benzotriazole and ethyl bromoacetate, and then reacting with 2, 2, 6, 6-tetramethyl-4-piperidinol; the double-bond DOPO derivative is prepared through the reaction of DOPO-HQ and 4-vinyl benzyl chloride; the modified maleic anhydride grafted polypropylene is prepared by grafting octa-aminopropyl polyhedral oligomeric silsesquioxane prepared by a polycondensation reaction of 3-aminopropyltriethoxysilane and maleic anhydride grafted polypropylene. The pipe prepared by the invention has good mechanical properties, ultraviolet aging resistance, low-temperature toughness, heat resistance, flame retardance and wear resistance.

The invention discloses an anti-doodling superhard heat-insulating coating as well as a preparation method and application thereof, and relates to the technical field of heat-insulating coatings. The preparation method comprises the following steps: preparing ladder-type polysilsesquioxane from epoxy siloxane, then taking the ladder-type polysilsesquioxane and 2, 5-bis (trifluoromethyl)-3, 6-dioxaundecafluorononanoyl fluoride as raw materials, and successfully synthesizing fluorinated ladder-type polysilsesquioxane through chemical grafting of a fluorine-containing oligomer and the ladder-type polysilsesquioxane, so as to obtain the fluorinated ladder-type polysilsesquioxane. The preparation method comprises the following steps: preparing a fluorinated trapezoid polysilsesquioxane coating, mixing the fluorinated trapezoid polysilsesquioxane coating with a triaryl sulfonium hexafluoroantimonate mixture to prepare a fluorinated trapezoid polysilsesquioxane coating, and sequentially spin-coating a CWO coating and the fluorinated trapezoid polysilsesquioxane coating on a substrate for curing to obtain the anti-doodling superhard heat-insulating coating. The prepared anti-doodling superhard heat insulation coating has excellent anti-doodling performance, high hardness, good heat insulation effect and use stability, can be used for manufacturing energy-saving windows to prolong the service life of the energy-saving windows, and has important scientific research value and commercial application value.

The invention relates to the technical field of electronic materials, in particular to a copper-clad plate resin composition with an ultralow-loss medium and a preparation method of the copper-clad plate resin composition. The composition comprises the following components: modified polyphenyl ether, dicyclopentadiene epoxy resin, trifunctional epoxy resin, active ester, cyanate ester, DMAP, spherical silicon dioxide and a POSS-silicon dioxide compound, the preparation method comprises the following steps: carrying out surface norbornenylation modification on bimodal spherical silicon dioxide, and carrying out click reaction on the bimodal spherical silicon dioxide and octa-aminophenyl polysilsesquioxane with tetrazinyl at the tail end to prepare a POSS-silicon dioxide compound, so as to construct an interface transition layer with gradient modulus. According to the invention, collaborative optimization of dielectric loss, thermal mechanical properties and interface bonding strength is realized, and the material has excellent properties of low dielectric loss, high thermal stability, high peel strength and the like, and is suitable for the fields of 5G communication, high-frequency electronic equipment and the like.

The invention relates to the technical field of polyamide nanofiltration membranes, in particular to an acid and alkali resistant high-strength nanofiltration membrane and a preparation method thereof. The problem that the strength and the acid and alkali resistance of a polyamide nanofiltration membrane in the prior art cannot be considered at the same time is solved. The base membrane material of the polyamide nanofiltration membrane is modified polyethersulfone and is obtained by chemically bonding a carbon nanotube subjected to double surface modification by titanium dioxide sol-gel and a KH550 coupling agent in a polyester non-woven fabric, and the modulus of the material is improved by utilizing an inorganic-organic hybrid network; the functional layer of the polyamide nanofiltration membrane is made of modified polyamide, and the modified polyamide functional layer is formed by forming a polyamide matrix through polymerization reaction of 2, 2 '-disulfonic acid-4, 4'-diaminobiphenyl, piperazine and trimesoyl chloride and introducing 4-amino-2, 2, 6, 7-tetramethyl-1, 3-pentanediol at the same time. And the chemical resistance is improved by a free radical capturing group generated by 2, 2, 6, 6-tetramethylpiperidine and octa-isobutyl cage type silsesquioxane.

The invention relates to a POSS (Polyhedral Oligomeric Silsesquioxane) type sulfonate flame retardant, a high-hardness transparent flame-retardant PC (Polycarbonate) material and a preparation method of the POSS type sulfonate flame retardant, the POSS type sulfonate flame retardant is prepared by the following steps: adding phenyltrimethoxysiloxane and gamma-(2, 3-epoxypropoxy) propyltrimethoxysilane into a mixed solution, uniformly mixing, and then adding a basic catalyst for reaction to obtain an intermediate; and adding aminobenzene sulfonic acid into the intermediate, heating to react, neutralizing with alkali, filtering, washing and drying to obtain the POSS type sulfonate flame retardant. The POSS type sulfonate flame retardant prepared by the invention is a novel flame retardant containing sulfur and silicon elements at the same time, can improve the flame retardance and melt dripping resistance of a PC material when being added into the PC material, and solves the influence of the addition of a PTFE type anti-dripping agent on the optical performance of the PC material; meanwhile, due to the high compatibility of the POSS type sulfonate flame retardant, small molecule migration does not exist, the flame-retardant timeliness is high, and the problem that the flame-retardant timeliness of traditional sulfonate is insufficient is solved.

The invention belongs to the field of electronic device protective coatings, and particularly relates to a water-based polyimide / POSS-GO composite coating and a preparation method and application thereof.The method comprises the steps that firstly, dianhydride and diamine monomers react to prepare polyamic acid, then tertiary amine is made into a salt agent to prepare water-soluble polyamic acid salt, and then the water-soluble polyamic acid salt is prepared into a water-soluble polyimide / POSS-GO composite coating; the preparation method comprises the following steps: modifying graphene oxide with aminated polyhedral oligomeric silsesquioxane to prepare a POSS-GO filler, uniformly dispersing the filler and water-based polyamic acid salt, spraying on the surface of a base material, and then carrying out thermal imidization treatment to prepare the water-based polyimide / POSS-GO composite coating. The composite coating prepared by the method is a novel coating material with excellent corrosion resistance and low dielectric property, not only provides a new thought for the design of a high-performance anticorrosive coating, but also provides a potential material strategy for a multifunctional protective coating of an electronic device.

The invention discloses a preparation method of an electronic-grade hydroxylamine aqueous solution, and relates to the field of chemical preparation. The preparation method comprises the following steps: reacting electronic-grade ammonia water or organic alkali with electronic-grade hydroxylamine salt to generate a hydroxylamine aqueous solution; and after the reaction, separating through a POSS (Polyhedral Oligomeric Silsesquioxane) nano blending modified membrane, and removing salt, impurities and unreacted raw materials to obtain a high-purity hydroxylamine aqueous solution. And concentrating the solution into a 50% hydroxylamine aqueous solution by adopting a low-temperature vacuum concentration technology. The method can effectively remove metal ions and inorganic impurities, and ensures that the final product is high in purity and meets the electronic grade requirement.