1153 results about "Silsesquioxane" patented technology

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

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

The invention 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 waterborne epoxy resin coating, a preparation method and application in bridge protection, and belongs to the technical field of coatings. The water-borne epoxy resin coating comprises the following raw material components in parts by weight: 15-25 parts of epoxy composite resin emulsion, 100 parts of emulsified asphalt, 3-5 parts of a curing agent and 6-10 parts of water, wherein the epoxy composite resin emulsion is obtained by carrying out a composite reaction on 30-60 parts by mass of epoxy resin, 2-3 parts by mass of an emulsifier, 6-9 parts by mass of an acrylate composition and 1.4-1.6 parts by mass of a co-stabilizer; the acrylate composition is prepared by prepolymerizing 15 to 16 parts by mass of butyl methacrylate, 10 to 12 parts by mass of 2-isopropenyl aniline, 5 to 7 parts by mass of allyl glycidyl ether and 1 to 1.2 parts by mass of allyl polyhedral oligomeric silsesquioxane and then combining the prepolymerized materials with 1 to 3 parts by mass of acrylic acid.

The invention relates to the field of essential oil slow release, and discloses a mildew-proof tablet containing plant essential oil and a preparation method and application thereof.The mildew-proof tablet containing the plant essential oil comprises two epidermal layers and an essential oil slow-release layer arranged between the two epidermal layers, the preparation method comprises the following steps: grafting sodium abietate and aminated mesoporous silica to prepare functionalized mesoporous silica, loading plant essential oil on the functionalized mesoporous silica to obtain a core material, introducing dihydroxyl polyhedral oligomeric silsesquioxane into a polyurethane main chain, wrapping the core material to prepare an essential oil slow-release agent, taking lignin as a base material, taking the essential oil slow-release agent as an effective component, and preparing the essential oil slow-release agent. And preparing to obtain the essential oil slow-release layer. The prepared essential oil slow-release layer can achieve the effects of essential oil slow release and antibiosis and mildew prevention, the slow-release effect is remarkable under the normal-temperature and high-temperature conditions, the good slow-release effect is still kept in the humid environment, and the efficacy period of the material is greatly prolonged.

The invention relates to a flame-retardant toughening agent for a polypropylene material and a preparation method of the flame-retardant toughening agent, and belongs to the technical field of macromolecular flame-retardant toughening, and the preparation method comprises the following steps: firstly combining an aromatic compound with melamine, and then combining with a flame-retardant material to obtain a flame-retardant compound; the preparation method comprises the following steps: combining itaconic anhydride, a modified toughening agent, octavinyl silsesquioxane and polypropylene through graft copolymerization to obtain grafted polypropylene; combining the flame-retardant compound with grafted polypropylene to obtain a modified flame-retardant toughening agent; and mixing the modified flame-retardant toughening agent with an antioxidant and a lubricant, and carrying out melt blending extrusion to obtain the flame-retardant toughening agent for the polypropylene material. According to the technical scheme, the aromatic compound, the melamine and the flame-retardant material are combined, so that the flame-retardant property of the polypropylene material is effectively improved; the itaconic anhydride, the modified toughening agent and the octavinyl silsesquioxane are combined with the polypropylene, so that the impact toughness and the mechanical property of the polypropylene material are enhanced, and the comprehensive performance of the flame-retardant toughening agent is generally improved.

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 discloses a photovoltaic POSS (polyhedral oligomeric silsesquioxane)-containing antireflection film coating liquid and a preparation method thereof, the coating liquid comprises the following raw materials in parts by weight: 80-100 parts of modified emulsion, 10-15 parts of modified graphene, 3-5 parts of sodium dodecyl benzene sulfonate, 1-3 parts of triethylene tetramine and 40-60 parts of deionized water, a modified additive in the coating liquid contains a polyhedral oligomeric silsesquioxane structure, the polyhedral oligomeric silsesquioxane structure can form uniformly-distributed nanopores and is matched with a two-dimensional honeycomb lattice structure in the graphene oxide, the surface roughness can be increased, the microstructure can scatter incident light and reduce specular reflection, so that the surface light transmittance is improved, and meanwhile, the modified additive molecule contains a fluoroalkyl structure, so that the surface light transmittance is improved. The fluoroalkane has a high refractive index, so that light reflection can be reduced, and the light transmittance is further improved.

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 belongs to the field of advanced materials, and particularly relates to super-flexible and ultrathin hybrid glass and a low-temperature large-area preparation method thereof, and the hybrid glass comprises the following raw materials: oligomeric silsesquioxane, inorganic nanoparticles and a high-molecular polymer porous film. The ultra-flexible and ultra-thin hybrid glass prepared by the invention can be processed and formed at room temperature or lower temperature, compared with the existing commercial ultra-thin glass, the flexibility of the ultra-thin hybrid glass is remarkably improved, the ultra-thin hybrid glass is thinner, the problem that the traditional glass is fragile and the technical challenge in a thinning process are overcome, and the ultra-flexible and ultra-thin hybrid glass has good application prospects. The electronic equipment can be lightened and thinned, and the service life of the electronic equipment can be prolonged.

The invention relates to the field of coatings, and particularly discloses an anti-aging water-based acrylic coating and a preparation method thereof. The anti-aging water-based acrylic coating is prepared from the following raw materials in parts by weight: 55 to 60 parts of fluorosilicone modified acrylic emulsion; 8-18 parts of an anti-aging agent; 8 to 12 parts of silica sol; 6-10 parts of a flame retardant; 4-8 parts of heavy calcium powder; 6-10 parts of a pigment; 0.5 to 1 part of a thickening agent; the preparation method comprises the following steps: S1, preparing a fluorosilicone modified acrylic emulsion: carrying out blending reaction on an acrylic functional monomer, styrene and polyhedral oligomeric silsesquioxane with an emulsifier and an initiator to obtain the fluorosilicone modified acrylic emulsion; and S2, preparing the coating. The product disclosed by the invention has many excellent properties such as high hardness, good water resistance and excellent ultraviolet resistance, so that the product has excellent aging resistance and a good protection effect on an outer wall.

The invention provides a high-temperature thermal expansion microsphere with rapid foaming response and a preparation method of the high-temperature thermal expansion microsphere. The high-temperature thermal expansion microsphere comprises an olefinic unsaturated monomer, the olefinic unsaturated monomers comprise the following components in percentage by weight: 40 to 60 percent of acrylonitrile monomers, 10 to 20 percent of acrylic acid monomers, 10 to 20 percent of acrylamide monomers and 5 to 30 percent of cage type polysilsesquioxane monomers containing double-bond monofunctional groups; the double-bond monofunctional polyhedral oligomeric silsesquioxane monomer is used for participating in polymerization to form a microsphere shell. The foaming response speed of the microspheres can be remarkably improved, and the microspheres have high foam breaking temperature and high expansion performance.

The invention relates to the technical field of heat insulation pads for battery cells, in particular to a novel battery cell large-area buffer heat insulation pad and a preparation method thereof.The novel battery cell large-area buffer heat insulation pad is prepared by using surface modified boron nitride nanosheets (BNSS) as nanofiller, silica-coated magnesium hydroxide (MH-coated SiO2) of a core-shell structure as a flame retardant and polysilsesquioxane (POSS) as a high-temperature-resistant auxiliary. A ternary flame-retardant system is formed in the organic foamed silicone rubber layer through the nano filler, the flame retardant and the high-temperature-resistant additive, so that the flame-retardant property of the organic foamed silicone rubber material serving as a battery cell heat insulation pad is improved, thermal runaway propagation can be delayed, the requirements of light weight (the density is 0.3-0.6 g / cm < 3 >) and high mechanical strength are met, the manufacturing cost is reduced, the mass production cost is only increased by 15%, and the product quality is improved. However, the premium price space of the product can reach 50%, and the requirement of a high-end power battery is met.

The invention discloses a corrosion-resistant polysilsesquioxane modified polyurethane emulsion and a preparation method thereof, and belongs to the technical field of emulsions.The preparation method comprises the steps that gamma-aminopropyltriethoxysilane, namely APTES, is subjected to hydrolytic condensation under the catalysis of tetraethylammonium hydroxide, and POSS is prepared; the preparation method comprises the following steps: carrying out hydrolytic condensation reaction on APTES, synchronously adding phenyltrimethoxysilane in the hydrolytic condensation reaction, forming phenyl-amino difunctional POSS (Polyhedral Oligomeric Silsesquioxane) according to a molar ratio of phenyltrimethoxysilane to APTES of 1: 4, and grafting POSS and graphene oxide GO in dimethyl sulfoxide through amidation reaction to prepare a POSS / GO composite material; dispersing POSS / GO / Zn in the polyurethane prepolymer, adding a curing agent and a solvent, and stirring to form a homogeneous emulsion; through phenyl trapezoid polysilsesquioxane modification and dynamic reversible self-repairing network design, the wear resistance of the coating is improved, microcracks can be closed at the temperature of 60 DEG C, and the maintenance requirement is reduced; laser micro-nano structured base material treatment is combined, the adhesive force is increased to be larger than or equal to 20 MPa, and meanwhile a gamma-butyrolactone low-VOC solvent is adopted.

The invention provides a foldable dimming film which comprises a bendable base material layer, a first adhesion promoting layer, a conductive layer, a second adhesion promoting layer, a polymer dispersed liquid crystal layer, a second adhesion promoting layer, a conductive layer, a first adhesion promoting layer and a bendable base material layer which are sequentially stacked, and the conductive layer comprises graphene oxide and silver nanowires. The polymer dispersed liquid crystal layer comprises liquid crystals, linear polyurethane acrylate and functionalized polysilsesquioxane, the functionalized polysilsesquioxane accounts for 10%-20% of the total mass of the linear polyurethane acrylate and the functionalized polysilsesquioxane, and the bendable base material layer is made of a polymer with polar groups. The first adhesion promoting layer is made of linear polyurethane acrylate, the second adhesion promoting layer is composed of polyester polyol and cellulose, and the mass fraction of the cellulose is 15%-20%. The dimming film provided by the invention has relatively good foldability.

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 discloses a halogen-free flame-retardant nylon material which comprises PA (polyamide), a toughening agent, a P-series flame retardant, an N-series flame retardant, modified polyhedral oligomeric silsesquioxane and a derivative flame-retardant synergist of the modified polyhedral oligomeric silsesquioxane. The modified polyhedral oligomeric silsesquioxane and the derivative flame-retardant synergist thereof contain boron, an annular structure R2 with the carbon hydrogen ratio larger than 1 and two inorganic silicon cage cores, and the structures form a carbon layer, a ceramic barrier layer, a protective film or a heat-insulation coke layer and other protective layers in the combustion process, so that the anti-dripping effect is greatly improved, and meanwhile, the anti-dripping effect is greatly improved. Heat and oxygen transfer is isolated, combustible gas release is reduced, and the flame retardant property of the material is remarkably improved under the combined action of multiple mechanisms. Furthermore, the flame retardant synergist of the modified polyhedral oligomeric silsesquioxane and the derivative of the modified polyhedral oligomeric silsesquioxane is matched with the P-series flame retardant and the N-series flame retardant to realize synergistic flame retardance, so that the flame retardant property of the flame-retardant nylon material is improved while the dosage of the flame retardant is reduced. The halogen-free flame-retardant nylon material provided by the invention is excellent in flame retardance.

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.

The invention relates to the technical field of photoresist, in particular to glass photoresist, a preparation method of the glass photoresist and a femtosecond laser preparation method of an optical fiber end face micro-nano glass structure. The glass photoresist is prepared from acrylic polysilsesquioxane and acrylic ester, glass photoresist is arranged on a preset surface; photocuring equipment is adopted to carry out photocuring on the glass photoresist, so that the glass photoresist forms a cured structure; and performing heat treatment on the cured structure. Compared with the prior art, the glass photoresist different from the traditional silicon dioxide loaded glass photoresist is obtained, the problem that the traditional silicon dioxide additive printing technology is limited by the size of silicon dioxide nanoparticles is solved, and printing of a glass monomer polymerization cross-linked structure with the characteristic size exceeding the diffraction limit is achieved; organic components in the cross-linked precursor are effectively decomposed through heat treatment, and manufacturing of the optical fiber end face integrated high-quality silicon dioxide micro-nano glass is achieved.

The invention relates to the technical field of materials, and discloses a bamboo-to-plastic packaging material and a preparation method thereof, and the bamboo-to-plastic packaging material comprises the following components by weight: 60-70 parts of bamboo powder, 2-4 parts of maleic anhydride modified bamboo powder, 20-30 parts of polyethylene, and 2-3 parts of chitosan modified polyhedral oligomeric silsesquioxane. Adding the bamboo powder, the maleic anhydride modified bamboo powder, polyethylene and chitosan modified polyhedral oligomeric silsesquioxane into a double-screw extruder, blending for 10-15 minutes at the temperature of 180-185 DEG C, carrying out extrusion molding, and cooling to room temperature, so as to obtain the bamboo-to-plastic packaging material. The bamboo-instead-plastic packaging material disclosed by the invention has relatively good flame-retardant, antibacterial and stretch-proof effects.

An organic silicon resin toughening agent, a single-component high-strength epoxy structural adhesive, and preparation methods for both. The organic silicon resin toughening agent is prepared by reacting epoxy modified hydrogen-containing silicone oil and vinyl six-membered cyclic oligomeric silsesquioxane; and the epoxy modified hydrogen-containing silicone oil is prepared by reacting allyl alcohol glycidyl ether and hydrogen-containing silicone oil which contains hydrogen at both ends. Compared with toughening agents such as nitrile rubber and core-shell structured rubber, the synthesized organic silicon resin toughening agent having a cyclic mesh structure unit in the present invention has better high and low temperature resistance, and can significantly improve the high and low temperature resistance of the single-component high-strength epoxy structural adhesive while improving the toughness of the single-component high-strength epoxy structural adhesive.

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 relates to the technical field of oil wells, in particular to cyano resin containing a cage-shaped silsesquioxane structure and a preparation method of the cyano resin, in the preparation process, a cage-shaped framework structure containing inorganic Si-O-Si bonds is obtained through hydrolytic condensation reaction of silane, and functional groups containing reactive cyano groups are grafted on organic benzene rings on the periphery of the cage-shaped framework structure. A cage-shaped skeleton structure formed by Si-O-Si bonds and heteroaromatic rings (triazine rings and phthalocyanine rings) generated after cyano polymerization are chemical bonds and functional groups with extremely high bond energy and thermal stability, so that the finally prepared material has high heat resistance, high carbon yield and high thermal oxidation stability, and due to the fact that the Si-O-Si bonds are low in polarity and water absorption rate, the material can be used for preparing a high-temperature-resistant material. Therefore, the polarity and the water absorption rate of the final resin material are relatively low.

The invention relates to a defoaming agent with fast dispersion, low cloud point, high temperature and high pressure resistance, strong acid and strong alkali resistance, which is prepared from the following components in percentage by weight: 5%-50% of white carbon black silicon paste, 1%-25% of terminated polyether modified polysiloxane, 0.1%-10% of spherical polysilsesquioxane, 1%-25% of compound polyether, 0.1%-10% of thickening agent, 0.05%-0.5% of sterilizing agent and the balance of water, and the sum of the weight percentages of the components is 100%. The invention also provides a production process of the defoaming agent, which comprises the following steps of: stirring the white carbon black silicon paste, the spherical polysilsesquioxane and the terminated polyether modified polysiloxane by using a homogenizer to be fully mixed, then adding the compound polyether, the thickening agent and the sterilizing agent, uniformly stirring, and continuously and quickly stirring for 25-35 minutes by using the homogenizer to obtain the defoaming agent. The uniformly mixed polyether modified polysiloxane defoaming agent is obtained. The invention aims to provide the defoaming agent which is high in dispersion speed, low in cloud point, resistant to high temperature and high pressure and resistant to strong acid and strong alkali.

The invention discloses a mosquito repellent slow-release system, a preparation method and application. The mosquito repellent slow-release system comprises deet and an adsorbent, and the adsorbent is selected from one or more of porous silica and polyester; the surface of the porous silica is modified with one or more of a hydroxyl siloxane group, a methyl siloxane group, an amino siloxane group and a methoxy amino-terminated polydimethylsiloxane / silsesquioxane copolymer; the mass ratio of the deet to the adsorbent can be (0.001 to 30): (0.001 to 30). According to the mosquito repellent sustained-release system, by optimizing the formula design and combining the sustained-release technology, the mosquito repelling time of deet can be remarkably prolonged on the basis of the conventional mosquito repellent content, and meanwhile, the irritation to skin is greatly reduced.

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 discloses a flame-retardant and self-repairing wood epoxy coating as well as a preparation method and application thereof, and belongs to the technical field of epoxy resin. The preparation method specifically comprises the following steps: (1) uniformly mixing vanillin, epichlorohydrin and tetrabutylammonium bromide, reacting, cooling, dropwise adding a NaOH aqueous solution, continuously reacting, washing, drying, precipitating and drying again to obtain bio-based epoxy resin for later use; (2) uniformly mixing methanol and hydrochloric acid, heating, carrying out condensation reflux, adding gamma-aminopropyltriethoxysilane, reacting, cooling, adding tetrahydrofuran, washing and carrying out vacuum drying to obtain polyhedral oligomeric silsesquioxane; and (3) dissolving polyhedral oligomeric silsesquioxane in the organic solvent, adding the bio-based epoxy resin, uniformly stirring, standing and curing to obtain the composite material. According to the invention, vanillin is used for constructing the epoxy resin containing imine bonds, so that the self-repairing and excellent flame-retardant properties of the epoxy resin are realized.

The invention relates to a composite water reducing agent for lithium slag concrete as well as a preparation method and application thereof, and the composite water reducing agent comprises the following raw materials in parts by weight: 40-60 parts of a siloxane modified polycarboxylic acid polymer solution, 25-40 parts of a POSS-based silane coupling agent, 3-5 parts of polyethylene glycol and 20-25 parts of an alkali activator. The POSS-based silane coupling agent is prepared by carrying out a Michael addition reaction on acryloyloxy silane and amino propyl heptyl-polyhedral oligomeric silsesquioxane according to a molar ratio of 1: (1 to 1.03); the siloxane modified polycarboxylic acid polymer solution is prepared by polymerizing polymeric monomers, namely a monoalkenyl polyether monomer, an acrylic monomer, monoalkenyl dibasic acid and unsaturated siloxane in the solution according to a molar ratio of 1: (2-3): (2-3): (0.1-0.3), and the solid content of the polycarboxylic acid polymer solution is 40-50wt%. Under the synergistic and balanced effects of all the components of the composite water reducer, the workability of the lithium slag concrete can be remarkably improved, and the water reducing effect of the water reducer is fully exerted.