122 results about "Fluorine free" patented technology

This porous membrane 1 contains a fluorine-free resin as a main component, and has a first surface 1a in which a plurality of holes are present and a second surface 1b on the opposite side from the first surface 1a. The arithmetic mean height Sa1 of the first surface 1a is 0.2 μm or greater. This method for producing a porous membrane 1 comprises, in the following order, a step for applying a solution that contains a fluorine-free resin and a solvent to a first surface 5a of a base material 5 to form a coating film, a step for immersing the coating film in water, a step for drying the coating film, and a step for detaching the coating film from the base material 5. The arithmetic mean height Sa3 of the first surface 5a of the base material 5 is 0.42 μm or greater.

The present invention is directed to fluorine-free firefighting foams containing one or more biopolymers. The biopolymers of the compositions of the present invention include for example, diutan, guar, xanthan, scleroglucan, and combinations thereof.

The present application relates to the field of polyurethane, in particular to a kind of fluorine-free high-efficiency carbon-forming flame-retardant polyether polyurethane and preparation method thereof.Flame-retardant polyether polyurethane includes the following components by mass fraction: thermoplastic polyether polyurethane matrix 75-87 parts, halogen-free fluorine-free catalytic carbon composite flame retardant 13-18 parts, functional additive 0-5 parts.The present application realizes high-efficiency flame retardation under very low addition amount through synergistic effect of phosphorus-nitrogen flame-retardant system and catalytic carbon system, only 13-18 parts of flame retardant addition amount is needed, 0.5-3.0mm wall thickness product can reach UL1581 VW-1 highest flame-retardant grade, completely no dripping, solve the industry pain point of traditional halogen-free flame-retardant system high addition amount, thin-wall flame-retardant substandard, rely on fluorine-containing additive anti-dripping, perfect adaptation to the flame-retardant demand of thin-wall product such as electric wire and cable.

This invention relates to the field of functional textile materials technology, and discloses a fluorine-free waterproof fabric and its preparation process. The fluorine-free waterproof fabric is composed of a host-guest inclusion crosslinking type organosilicon synergistic film-forming agent, an organic small molecule film-forming component, a crosslinking promoter, a dispersant stabilizer, a softening agent, and a solvent. The host-guest inclusion crosslinking type organosilicon synergistic film-forming agent is prepared by forming a host-guest inclusion structure with β-cyclodextrin and adamantane carboxylic acid, followed by reactive modification with 3-isocyanate propyltriethoxysilane. The organic small molecule film-forming component is norbornene-2-carboxylic acid. Through host-guest inclusion, crosslinking, and organic small molecule synergistic film formation, a stable and dense fluorine-free waterproof functional layer is formed on the fabric surface. This invention significantly improves waterproof performance and its washability and abrasion resistance without using fluorine-containing compounds, while also maintaining the soft hand feel of the fabric, demonstrating good environmental friendliness and application prospects.

A dental varnish composition for promoting enamel remineralization may comprise nano-hydroxyapatite particles dispersed in a biocompatible resin matrix that forms an adhesive film on tooth enamel. The composition may include a solvent to facilitate uniform dispersion and one or more additives. The resin matrix may be hydrophilic to enhance adhesion and wetting of enamel microstructures. Contact with saliva triggers controlled, gradual release of nano-hydroxyapatite, providing sustained remineralization benefits and protection against demineralization over an extended period. The nano-hydroxyapatite may penetrate enamel microstructures and repair microlesions, while optionally reducing dentin hypersensitivity. The composition may be fluoride-free and formulated with defined weight ratios of resin, particles, and solvent. A method of treatment includes applying the varnish to tooth surfaces, forming the adhesive film, and allowing slow release of nano-hydroxyapatite to strengthen enamel.

The utility model provides a kind of fabric for clothing and contain its sweat suit. The fabric includes surface layer, membrane layer and bottom layer. The surface layer uses warp plain or weft plain knitting technology, and is treated using water repellent finishing process. The water repellent finishing process used by the surface layer contains fluorine-free water repellent auxiliary and C4, C6 water repellent auxiliary. The membrane layer is thermoplastic polyurethane membrane layer or polyurethane membrane layer. The sweat suit prepared by the above-mentioned fabric has windproof and light rainproof effect, providing comfortable wearing experience for the wearer.

The utility model relates to textile material technical field, concretely is an ecological waterproof ultraviolet resistance composite function fabric, including by waterproof layer, ultraviolet resistance layer, skin breathable layer is composed of whole, waterproof layer, ultraviolet resistance layer, skin breathable layer is by waterborne polyurethane hot melt adhesive point -like adhesion, waterproof layer, ultraviolet resistance layer, skin breathable layer edge adopts ultrasonic seamless compression process closed, the waterproof layer is by the regenerated polyester fiber and flax fiber blend weaving and is formed, the waterproof layer surface is treated by fluorine -free environmental protection waterproof agent dip -mull, the ultraviolet resistance layer is by the yarn weaving that organic cotton fiber and nano zinc oxide particle blend spinning are made, the utility model discloses waterproof layer, ultraviolet resistance layer, skin breathable layer triple structure design, combine environmental protection technology and realize multifunctional synergy, make the whole have high waterproofness, strong ultraviolet resistance and excellent air permeability.

The application discloses a preparation method of nanocellulose / polyethyleneimine / MIL-101(Cr) composite porous material for efficiently capturing dyes and heavy metal ions in wastewater. First, Cr(NO3)3.9H2O is selected as a metal ion source, H2BDC is selected as an organic ligand, and water is selected as a solvent, and MIL-101(Cr) powder without fluorine is prepared through a hydrothermal synthesis method; then, CNF is selected as a green polymer matrix, PEI is selected as a functional reagent, and MIL-101(Cr) nano-filler is simply complexed with a crosslinking agent to prepare a series of new nanocellulose / polyethyleneimine / MIL-101(Cr) aerogels which are uniform and low in density, can efficiently absorb organic dyes and heavy metal ions in wastewater, and have a synergistic effect on simultaneously absorbing dyes and heavy metal ions in a binary system. The raw materials in the application are derived from biomass, have the advantages of biodegradability and good biocompatibility, and have the characteristics of easy availability, simple preparation method, short operation process, recyclability, environmental protection and economy. The application has a good application prospect in wastewater treatment and other industries.

The application discloses a kind of based on fluorine-free organic small molecule ultra-thin super-hydrophobic coating and preparation method thereof, specific steps are as follows: 20 portions-40 portions of amine compound, 20 portions-40 portions of epoxy compound and 20 portions-40 portions of solvent are mixed, and mixed solution is obtained.After substrate is soaked in mixed solution 1h-24h, pretreated substrate is obtained.1 portion-30 portions of olefin compound, 1 portion-25 portions of polydimethylsiloxane, 1 portion-25 portions of initiator, 1 portion-40 portions of mercapto compound, 1 portion-40 portions of solvent are mixed, and mixed coating is obtained.Mixed coating is evenly covered on the surface of pretreated substrate, and after standing 1h-7h, it is dried, and ultra-thin super-hydrophobic coating is obtained.The ultra-hydrophobic coating prepared by the method has excellent stability, durability, self-cleaning property and oil-water separation performance, and can be widely used for separating immiscible oil-water mixture.

An optical article comprising a coating system that imparts anti-reflective properties and hydrophobic properties to the optical article. The coating system includes a hard coating layer on a lens substrate, and alternating layers of a low refractive index metal oxide and a high refractive index metal oxide deposited on the hard coating layer as an anti-reflective coating, or alternating layers of a medium refractive index metal oxide and a high refractive index metal oxide deposited on the hard coating layer as an anti-reflective coating. A fluorine-free hydrophobic coating composition is deposited on the anti-reflective coating to reduce the surface free energy of the anti-reflective surface of the optical article and to improve the overall cleaning performance of the lens surface by rendering the lens surface hydrophobic.

The application discloses a kind of multistage synergic covalent grafting type hydrolysis-resistant self-cleaning PET submarine cable monofilament and preparation method, the monofilament includes three parts of core layer, skin layer and surface layer, the core layer is the high viscosity polyethylene terephthalate resin containing carbodiimide anti-hydrolysis agent;Skin layer is the modified PET resin of functional polysiloxane covalent grafting, wherein the functional polysiloxane has epoxy end group or isocyanate end group, and main chain has Si-H group;Surface layer is the fluorine-free low surface energy layer formed by polyvinyl long side chain alkane polysiloxane and residual Si-H group in skin layer through hydrosilylation reaction.The application significantly improves the durability of monofilament in humid heat environment, so that it is suitable for long-term humid heat service environment such as marine cable and industrial fabric, and can maintain stable mechanical strength and self-cleaning performance for a long time.

The application discloses a preparation method of a fluorine-free modified MXene-based super-hydrophobic photothermal coating. The method first prepares multilayer MXene powder through an in-situ etching method, then disperses the multilayer MXene powder and modifies the surface of the multilayer MXene powder by using fluorine-free cage-shaped polysilsesquioxane to obtain fluorine-free cage-shaped polysilsesquioxane MXene super-hydrophobic photothermal material, and finally prepares the fluorine-free modified MXene-based super-hydrophobic photothermal coating through spraying. The fluorine-free modified MXene-based super-hydrophobic photothermal coating prepared by the method has excellent super-hydrophobic performance and exhibits photothermal conversion performance that is higher than that of an original MXene-based coating and a fluorine-modified MXene-based super-hydrophobic photothermal coating, and the preparation method is simple and avoids pollution caused by fluorine-containing modifiers. Furthermore, the fluorine-free modified MXene-based super-hydrophobic photothermal coating can not only prevent ice by using a super-hydrophobic surface but also actively remove ice by using photothermal conversion characteristics, and has excellent ice prevention and ice removal performance.

The present invention relates to a pump, in particular a vacuum pump, comprising a pump-active component having a coating, wherein the coating comprises an oxide layer, which is in particular formed by anodic oxidation in an acidic electrolyte and which has pores, and a fluorine-free polymer-based and / or sol-gel-based sealing, and wherein the pores of the oxide layer are at least partly covered by the sealing and / or impregnated with the sealing and / or filled with the sealing. The present invention further relates to a method of sealing a porous oxide layer.

This invention relates to an optimization method for an organic, environmentally friendly water-based fire extinguishing agent, belonging to the field of intelligent optimization technology for fire extinguishing agent formulations. The method parametrically models the fire extinguishing agent formulation and preparation process to construct a joint feasible domain; it establishes a comprehensive performance function including extinguishing time, cooling capacity, smoke suppression index, and reignition probability, and simultaneously constructs a function including TOC, COD, and EC. 50 An environmental risk function is derived based on VOC, organic fluorine content, and bio-based proportion, with environmental thresholds as constraints. Mechanism consistency constraints such as surface tension, viscosity window, and lower bound of cooling capacity are introduced. Through worst-case robust optimization and an active sampling closed-loop update mechanism, stable performance optimization under low-temperature and brine environments is achieved. This method can obtain optimal fire extinguishing agent formulations and process parameters that combine environmental compliance, smoke suppression and reignition resistance, and multi-condition adaptability, while meeting the requirements of fluorine-free and high bio-based proportions.

The application provides a fluorine-free ester-based electrolyte, a preparation method and a high-voltage lithium ion battery. The fluorine-free ester-based electrolyte comprises a lithium salt, a fluorine-free solvent and a fluorine-free additive; the fluorine-free solvent is a methylated linear carbonate and / or a methylated linear carboxylate, and the fluorine-free additive is a cyclic boroxine or a cyclic siloxane with 3-5 carbon-carbon double bonds; the methylated linear carbonate has a general structural formula as shown in formula (1); wherein R1 and R2 are independently alkyl groups with 1-4 carbon atoms, and the carbon atom number of at least one of R1 and R2 is greater than or equal to 3; the methylated linear carboxylate has a general structural formula as shown in formula (2); wherein R3 is a hydrogen atom or an alkyl group with 1-4 carbon atoms, R4 is an alkyl group with 2-4 carbon atoms, and the carbon atom number of at least one of R3 and R4 is greater than or equal to 3. The fluorine-free ester-based electrolyte can significantly prolong the cycle life of the lithium ion battery.

The application discloses a low-temperature curing photoresist composition and a preparation method thereof, and belongs to the technical field of microelectronic and flexible display materials. The method comprises the following steps: preparing surface modified reactive nano-filler composed of multi-dimensional inorganic / carbon-based material; synthesizing photosensitive polyimide resin matrix by asymmetric bio-based diamine, nitrogen-containing heterocyclic diamine and fluorine-free dianhydride polycondensation; synthesizing low-dielectric benzocyclobutene-based silicone oligomer containing photosensitive double bond; dispersing the above components, a mercapto-alkene crosslinking network builder and a photoinitiator in an environmentally friendly solvent, and coating, ultraviolet exposure and low-temperature baking to obtain the finished product. The application breaks the high-temperature curing limitation of traditional polyimide by using the synergistic effect of mercapto-alkene crosslinking chemistry and multiple components, and realizes efficient curing. The photoresist has high resolution, low dielectric constant, excellent adhesion and excellent bending cycle life, and has excellent environmental protection, and is especially suitable for the manufacturing of flexible electronic devices and high-end display panels.

The application relates to a preparation method of ZSM-5 nanosheet zeolite and belongs to the technical field of catalyst preparation. The preparation method is used for synthesizing b-axis directional growth ZSM-5 molecular sieve under a seed guiding liquid in an acid medium and a fluorine-free system. The method comprises the following steps: mixing an aluminum source, inorganic acid, inorganic alkali, a silicon source and deionized water, fully stirring to form a gel, adding a small amount of seed guiding liquid, and adjusting the pH of the synthesis gel to be between 4 and 6 by controlling the adding amount of the inorganic acid. The b-axis directional growth ZSM-5 nanosheet is obtained by crystallization treatment at a certain temperature. The method is an inorganic system synthesis in a fluorine-free system, the silicon aluminum ratio is adjustable between 30 and 120, the system is green and environmentally friendly, the cost is low, the problems of high cost, limited silicon aluminum ratio and serious environmental pollution in the fluorine-containing system and the addition of organic growth agents for synthesizing directional growth nanosheets are solved.

The application discloses a fluorine-free waterproof and moisture-permeable electrostatic spinning nanofiber membrane and a preparation method thereof, relates to the technical field of polymer materials, and is prepared through coaxial electrostatic spinning of a spinning solution, wherein the spinning solution comprises polyurethane solution and organic polysiloxane solution in a mass ratio of 100:(5-7); the polyurethane solution comprises 5-30 parts of polyurethane and 70-95 parts of solvent A by weight; the organic polysiloxide solution comprises 1-30 parts of thermosetting organic polysiloxane, 0-10 parts of a crosslinking agent and 60-99 parts of solvent B by weight; and the thermosetting organic polysiloxane is hyperbranched polydimethylsiloxane with a vinyl group or an epoxy functional group at the end. The fluorine-free waterproof and moisture-permeable membrane of the polyurethane-silicone core-shell nanofiber with polyurethane as the core and crosslinked silicone resin as the shell is prepared through coaxial electrostatic spinning and in-situ drying and crosslinking, has the advantages of small fiber diameter, large specific surface area, small pore size and high porosity, and can effectively prolong the waterproof and durable effect.

The invention relates to a method for producing a blown film (4) from a fluorine-free polymer mixture (PG) using a blown film extrusion system (2) which has a blowing head (2.1) with a nozzle (10), wherein the nozzle (10) has a separately temperature-controlled nozzle section (6) which is separated from a base body (8) of the nozzle (10) by a temperature control section (12), comprising the steps of transferring (100) the fluorine-free polymer mixture (PG) through a melting channel (14) of the blowing head (2.1) into the separately temperature-controlled nozzle section (6), selectively temperature-controlling (200) the separately temperature-controlled nozzle section (6) to temper the fluorine-free polymer mixture (PG), and conveying (300) the tempered fluorine-free polymer mixture (PG) through an exit gap (16) of the nozzle (10) to produce the Blown film (4).

The invention discloses a surface treatment method of an antibacterial self-cleaning PVC guardrail, and relates to the technical field of coating surface treatment.The surface treatment method comprises the steps that a PVC base material is degreased and dried and activated through plasma / corona, a bondable interface is established, and an instant coating window is limited; depositing an interface anchoring-buffering integrated base coat formed by catechol-functional silane and a hydrotalcite-like dot matrix on the activated surface; a Si-Zr-ORMOSIL composite gradient barrier layer is constructed on the prime coat, cerium oxide is doped in the Si-Zr-ORMOSIL composite gradient barrier layer, and UV-LED low-temperature curing is adopted; a fluoride-free wear-resistant easy-to-clean top layer is formed on the barrier layer, and a functional thin layer is arranged according to windowing rate and thickness mapping and does not make contact with PVC; long-term adhesion, weather resistance and easy cleaning synergism are realized, yellowing and stripping risks are reduced, the antibacterial / self-cleaning function is kept and stably exerted, the process takt is short, and mass production is friendly; quality control can be quantified, and the method adapts to multiple scenes.

This invention discloses a sulfide-based fluorine-free high-entropy electrolyte in the field of battery technology, comprising a composite lithium salt system, a sulfide solvent, and a fluorine-free inert diluent. The composite lithium salt system consists of at least two lithium salts selected from lithium hexafluorophosphate, lithium tetrafluoroborate, lithium bis(fluorosulfonyl)imide, lithium bis(trifluoromethanesulfonyl)imide, lithium difluorooxalate borate, lithium nitrate, lithium perchlorate, lithium trifluoromethanesulfonate, lithium trifluoroacetate, and lithium dioxalate borate. The sulfide solvent is selected from one or more of dimethyl sulfide, diethyl sulfide, methyl ethyl sulfide, methyl propyl sulfide, methyl butyl sulfide, dimethyl disulfide, cyclohexane sulfide, phenyl sulfide, and diphenyl disulfide. The fluorine-free inert diluent is at least one of cyclopentane, cyclohexane, n-hexane, benzene, n-butane, isobutane, and n-pentane. This invention solves the problems of existing electrolytes, such as difficulty in balancing conductivity and interfacial stability, poor high and low temperature performance, and narrow electrochemical window; and achieves a comprehensive improvement in the overall performance of the electrolyte.

This invention proposes a general strategy based on layer-by-layer (LBL) assembly to prepare flexible, multifunctional fabrics that combine motion / health monitoring and fire alarm functions. The coating formulation is environmentally friendly, fluorine-free, and halogen-free: first, reduced graphene oxide (RGO) is deposited on the fiber surface to construct a conductive network; then, a hydrogel layer is introduced; and finally, a hydrophobic surface is grafted via chemical vapor deposition (CVD) to obtain the RHP fabric. This fabric achieves a limiting oxygen index (LOI) of 42.3%, a 213% improvement over the original sample (19.9%), and exhibits excellent flame retardant properties. It also possesses a linear operating range of 100% strain, a high specification factor (GF=90.3), and a fast response / recovery time. Furthermore, the RHP fabric enables precise temperature sensing and exhibits a stable resistivity-temperature relationship. When integrated into fire-fighting suits, it can rapidly trigger a fire alarm upon flame exposure and achieve self-extinguishing flames. This layered design provides a scalable blueprint for the fabrication of high-performance multifunctional fire alarm systems and intelligent protective clothing.

This invention belongs to the field of fluorine-free functional ceramic coating technology, and discloses a fluorine-free ceramic non-stick coating for aluminum-based cookware and its preparation method. The coating is composed of composite ceramic powder, a food-grade fluorine-free composite sintering aid composed of cerium oxide and lanthanum oxide pretreated with sodium citrate, food-grade nano-hydroxyapatite pretreated with a silane coupling agent, nano-alumina, a sinterable inorganic precursor, and deionized water in parts by weight. The preparation method includes substrate pretreatment, modified substance pretreatment, slurry preparation, coating, and low-temperature sintering steps. This invention achieves low-temperature sintering, avoids softening of the aluminum-based substrate, reduces energy consumption, and produces a coating with high density, excellent corrosion resistance and aging resistance, no harmful components are released, good non-stick properties, and is suitable for the industrial production requirements of aluminum-based cookware. Furthermore, it is fluorine-free, meeting food safety and environmental protection requirements.

The invention relates to a coated heating element (1) for a domestic article, comprising a metal base (2) coated on at least one face (2a) by a coating (3) which does not contain fluorocarbon resins and which comprises at least the following layers in the following order from the metal base (2): (3a) a base coat comprising polyethersulfone (PES); (3b) one or more intermediate layers (3b) comprising polyethersulfone (PES) or a mixture of polyethersulfone (PES) and one or more silicones; (3c) a top coat consisting of an elastomeric silicone derived from at least one organopolysiloxane bearing vinyl reactive functions (-CH=CH2) and at least one other organopolysiloxane bearing hydrosilyl reactive functions (Si-H) or mercaptan reactive functions (S-H), and optionally: one or more thermoplastic polymers, and / or one or more additives, and / or one or more colorants; layer (3a) being different from at least one of layers (3b).

This application discloses a novel fluorine-free waterproof finishing agent and its preparation method. The raw materials for preparing the novel fluorine-free waterproof finishing agent include: acrylate copolymer, emulsifier, organosilicon, modified nano-TiO2, initiator, organic solvent, and water. The acrylate copolymer comprises a first acrylate monomer, a second acrylate monomer, and a third acrylate monomer. This novel fluorine-free waterproof finishing agent does not require the addition of other auxiliaries to achieve highly effective waterproofing on various fabric materials without causing color changes. Furthermore, this application uses a fluorine-free formula, does not produce toxic or harmful substances, and meets environmental protection requirements.

This invention discloses a method for preparing a fluorine-free heating and insulating riser, relating to the field of casting technology. The method includes first modifying micron-nano composite aluminum powder with a silane coupling agent, then in-situ reducing and loading zero-valent iron-cerium dioxide catalytic sites, followed by sequentially coating with phenolic resin and a potassium nitrate-manganese dioxide composite oxygen source, and finally forming a silica shell through interfacial hydrolysis and condensation to obtain a core-shell structured composite heating agent. Separately, hollow aluminosilicate microspheres are etched to create pores, then vacuum-impregnated and filled with an organic-inorganic composite aerogel, followed by hydrophobic modification and coating with nano-alumina sol to obtain a composite insulating material. The heating agent is then mixed with the insulating material, mullite powder, corundum powder, expandable graphite, waste glass powder, and a binder, and the mixture is vibrated, compacted, and allowed to cure to obtain the finished product. This invention solves the problems of difficult heating and poor insulation in fluorine-free risers by constructing a multi-level core-shell heating structure and a porous, multi-level insulating structure.

This invention discloses a high-solids-content silicon-containing multi-arm star-shaped hydroxyl polyester for antifouling automotive coatings and its preparation method. The preparation method includes the following steps: mixing 1,3-dihydroxymethylurea, polyol, and caprolactone, adding an acid catalyst for reaction, and after the caprolactone has completely reacted, adding a single-ended epoxy-based polysiloxane and a cationic ring-opening catalyst dropwise. After the addition is complete, the reaction continues until the epoxy value decreases to below 1% of the initial value. Then, distilled water is added to decompose the cationic ring-opening catalyst. The mixture is then distilled under high vacuum conditions and cooled before being discharged to obtain the high-solids-content silicon-containing multi-arm star-shaped hydroxyl polyester. The high-solids-content silicon-containing multi-arm star-shaped hydroxyl polyester of this invention has advantages such as long activation period, low application viscosity, high application solids content, good chemical resistance of the coating film, fluorine-free properties, and good stain resistance when applied to polyurethane coatings.

This invention provides a method for preparing a fluorine-free modified organosilicon waterproofing agent, relating to the fields of fine chemicals and organosilicon waterproofing agents. The preparation method includes the following steps: adding γ-aminopropyltriethoxysilane and epoxy silicone oil in a mass ratio of (10~25):20 to a solvent to perform an epoxy ring-opening reaction, obtaining a branched-chain modified organosilicon precursor; adding 3-methacryloyloxypropyltrimethoxysilane, deionized water, and a catalyst in a mass ratio of (5~7):20 to the epoxy silicone oil, and performing a hydrolysis-condensation reaction to obtain the fluorine-free modified organosilicon waterproofing agent. The ring-opening modification yields a branched-chain modified organosilicon precursor, which is then grafted via a hydrolysis-condensation reaction. The introduction of amino groups enhances the reactivity and functional tunability of the organosilicon polymer. It also improves the interfacial compatibility of the organosilicon polymer and strengthens its bonding with cellulose paper-based materials.