647 results about "Hydrophilization" patented technology

A method for hydrophilifying the surface of a substrate by taking advantage of photocatalytic action. The substrate has a photocatalytic titania coating (10). The surface of the photocatalytic coating (10) bears the solid acid that increases a hydrogen bond component ( gamma Sh) in the surface energy in the solid / gas interface of the coating. Photoexcitation of the photocatalyst enhances the hydrogen bond component ( gamma Sh) in the surface energy of the photocatalytic coating (10), accelerating the physical adsorption of molecules of water in the atmosphere through a hydrogen bond (16) onto hydrogen atoms in a terminal OH group (12), bonded to a titanium atom, and a bridge OH group (14) on the surface of the coating. This results in the formation of a high density, physically adsorbed water layer (18) on the surface of the photocatalytic coating (10), thus permitting the surface of the substrate to be easily hydrophilified. The method is applicable to antifogging, antifouling, selfcleaning and cleaning of articles.

Provided are a graphene structure and a method for producing the same in which graphene can be patterned with high precision, and thereby microfabrication of electronic device elements and electronic devices using graphene is possible and the manufacturing cost can be notably reduced. A resist film is precisely patterned on a substrate, hydrophilized films are formed in openings of the resist film, and then GO is selectively fixed on the portions of the hydrophilized films by a chemical bond utilizing the hydrophilicity of the GO, and the GO is reduced to obtain a graphene structure in which graphene is selectively fixed to only the portions of the hydrophilized films. Thus, the graphene structure is constituted by disposing graphene on a substrate and forming a bond, by hydrophilization treatment, between the hydrophilized portion of the substrate and the graphene and / or between the unhydrophobized portion of the substrate and the graphene.

An aerogel substrate useful for an electrically conductive substrate, a heat insulating substrate, an optical waveguide substrate, a substrate for a light emitting device or a light emitting device is provided.The aerogel substrate is characterized by comprising a functional layer and an aerogel layer, and an intermediate layer formed between the functional layer and the aerogel layer to allow the functional layer to be formed uniformly thereon. The intermediate layer is formed on at least one surface of the aerogel layer by a gas phase method, by the Langmuir-Blodgett method or by adsorption of an inorganic layered compound; or formed by a hydrophilicizing treatment of at least one surface of the aerogel layer followed by coating and drying an aqueous coating fluid, by an annealing treatment of at least one surface of the aerogel layer, or by a hydrophilicizing treatment of at least one surface of the aerogel layer.

A spun-bonded nonwoven fabric constituted of a web of continuous filaments of thermoplastic synthetic fibers, the structure of which fabric is set by a pattern composed of areas which are produced by partially fusing the fibers by hot pressing and pierce through the fabric and concavely and convexly embossed patterns on the surfaces of the fabric which patterns are composed of high-density concave and convex areas of unbonded fibers respectively and the bulkiness of which fabric is 100 to 400 % in terms of the ratio of the thickness of the fabric inclusive of the convexly embossed pattern surface to the thickness of the low-density areas of the fabric. The application of a hydrophilic agent to the nonwoven fabric gives sanitary supplies such as disposable diaper.

The invention relates to polymeric ultrafiltration or microfiltration membranes of, for instance, Halar, PVDF or PP, incorporating PVME or vinyl methyl ether monomers. The PVME may be present as a coating on the membrane or dispersed throughout the membrane or both. The membranes are preferably hydrophilic with a highly asymmetric structure with a reduced pore size and / or absence of macrovoids as a result of the addition of PVME. The PVME maybe cross-linked. The invention also relates to methods of hydrophilising membranes and / or preparing hydrophilic membranes via thermal or diffusion induced phase separation processed.

A selective membrane having a high fouling resistance. In one embodiment, the selective membrane is a composite polyamide reverse osmosis membrane in which a hydrophilic coating is applied to the polyamide layer of the membrane, the hydrophilic coating being made by covalently bonding a hydrophilic compound to residual acid chlorides of the polyamide membrane, the hydrophilic compound including (i) at least one reactive group that is adapted to covalently bond directly to the polyamide membrane, the at least one reactive group being at least one of a primary amine and a secondary amine; and (ii) at least one non-terminal hydroxyl group.

The invention relates to a method for preparing a product with a one-way moisture-conducting function. The method comprises the following steps of: 1) performing hydrophilization pretreatment on a textile; and 2) spraying water repellent finishing agent-containing working solution on one face of the treated textile, so that liquid drops with diameter of 0.1 to 2mm and spacing of 0.1 to 2mm are formed on the face of the textile and the product with the one-way moisture-conducting function is obtained. Fabrics prepared by the method has the advantages of greatly reducing the using amount of a plurality of resources such as water, energy and the like and solving the environmental problems of pollution discharge and the like, along with the one-way moisture-conducting property.

The invention relates to a surface hydrophilic modification method for a polytetrafluoroethylene bulked membrane, which is characterized by comprising the steps of: pretreating a polytetrafluoroethylene membrane by adopting low-pressure glow discharge plasma to make the surface of the polytetrafluoroethylene membrane generate active groups, and grafting acrylic acid to form a relatively stable hydrophilic layer. The method has the advantages that: the active groups are generated on the surface of the polytetrafluoroethylene membrane by low-pressure plasma treatment, and the relatively stable hydrophilic layer can be formed on the surface of the membrane by acrylic acid grafting treatment, so that the hydrophilicity of the polytetrafluoroethylene membrane is effectively improved, and the effect is lasting; and the polytetrafluoroethylene membrane is treated by the low-pressure plasma induction and acrylic acid grafting, so the treatment method is simple, high-efficiency, water and energy-saving, and suitable for industrialized production.

The invention discloses a method of producing the hyperfiltration membrane of amphiphilic copolymer modified polyvinylidene fluoride, comprising the following steps: 1) mixing polyvinylidene fluoride, poly (methyl methacrylate - monomethyl ether polyoxyethylene methyl methacrylate), additives, non-solvent and solvent to form the casting film solution; 2) making the casting film solution into the polyvinylidene fluoride membrane by using the film forming machine and then soaking in the coagulation bath; 3) conducting the posttreatment of hydrophilicity; 4)obtaining the hydrophilic polyvinylidene fluoride ultrafiltration membrane after cleaning and drying. The method is characterized in that the brush shape, chain ball shape or dumbbell shape amphiphilic copolymer are mixed with the polyvinylidene fluoride to produce the polyvinylidene fluoride hyperfiltration membrane with hydrophilicity, anti-pollution, large flux and high retention rate by adopting the solution phase conversion method. The method has the advantages that the obtained membrane is provided with dozens to hundreds nanometer of particular densified hydrogel surface layers, the contact angle of the membrane surface can be reduced below 60 degrees and can be lowered to 0 degree within tens of seconds, the water flux can reach 1000L / m<2> / h (0.1Mpa) or above, the retention rate of BSA can reach 90% or more and the recovery rate of water cleaning flux can reach 90% or higher.

The invention provides a hydrophilized polydiorganosiloxane vinylic crosslinker which comprises (1) a polydiorganosiloxane polymer chain comprising dimethylsiloxane units and hydrophilized siloxane units each having one methyl substituent and one monovalent C4-C40 organic radical substituent having two to six hydroxyl groups, wherein the molar ratio of the hydrophilized siloxane units to the dimethylsiloxane units is from about 0.035 to about 0.15, and (2) two terminal (meth)acryloyl groups. The hydrophilized polydiorganosiloxane vinylic crosslinker has a number average molecular weight of from about 3000 Daltons to about 80,000 Daltons. The present invention is also related to a silicone hydrogel contact lens, which comprises repeating units derived from a hydrophilized polydiorganosiloxane vinylic crosslinker of the invention.

Thin film composite membranes on polyolefin structures may be prepared by interfacial polymerization on a polyolefin support. Polyolefin structures may have hollow and / or solid portions. The polyolefin structure may be hydrophilized prior to interfacial polymerization. The hydrophilized structure may also be treated with an aqueous monomer containing solution first, followed by the organic monomer containing solution. Alternatively, an organic monomer solution may be introduced first, followed by the aqueous monomer containing solution when treating a hydrophilized structure. The formed membrane may possess advantageous characteristics, including stability, hydrophilicity, predetermined pore sizes and / or solvent resistance.

The invention discloses a preparation method of graphene-containing water-based electrothermal film. The method comprises the following steps of: (1) carrying out hydrophilization treatment on graphene, then adding solutions of cellulose derivatives as a dispersing agent and a thickening agent, and carrying out pre-dispersion; (2) adding an auxiliary agent into the pre-dispersed graphene, and dispersing to obtain homogeneous dispersion liquid; (3) adding an adhesive into the homogeneous dispersion liquid, and mixing to obtain graphene-containing electrothermal film slurry; and (4) coating a film formation carrier with the graphene-containing electrothermal film slurry to form a graphene conducting layer, and drying to obtain the graphene-containing electrothermal film formed by the graphene conducting layer and the film formation carrier. After the preparation method is adopted, a heating body having excellent heat conduction and electric conduction properties can be prepared.

The invention discloses a preparation method of a polyvinylidene fluoride hollow fiber composite microporous membrane which has strong interfacial bonding force. The preparation method comprises the following steps: 1) neutral or amphiphilic substances which have good bonding force with braided fiber tubes and the polyvinylidene fluoride are prepared into dilute solution; 2) the dilute solution of the neutral or amphiphilic substances is coated once on the braided fiber tubes; 3) casting membrane liquid is used for secondary coating on the coated braided fiber tubes, and the polyvinylidene fluoride hollow fiber composite membrane is obtained by a solution phase transition method; 4) post-hydrophilization treatment is carried out; 5) the polyvinylidene fluoride hollow fiber composite membrane is cleaned and dried to obtain the hydrophilic polyvinylidene fluoride hollow fiber composite microporous membrane. The preparation method takes the braided fiber tubes as supporting tubes, uses an amphiphilic copolymer and the polyvinylidene fluoride to be blended, and prepares the polyvinylidene fluoride hollow fiber composite microporous membrane which has strong interfacial bonding force, hydrophilicity, pollution resistance, large flux, high interception rate and high mechanical strength by the solution phase transition method.

The present invention discloses a hydrophilization modification method of polytetrafluoroethylene membrane surface, comprising the following course: pretreating the polytetrafluoroethylene membrane by lycine surfactant, evenly coating a layer of hydrophilic polymer on the surface, placing the membrane material coated with hydrophilic polymer into the quaternized cross linker solution for in-situ quaternized cross linking reaction, finally getting the lasting hydrophilic modified polytetrafluoroethylene separation membrane. The present invention has abundant modifier source, simple method and low cost, and is suitable for industrial production; the cross-linked hydrophilic layer on the membrane surface is not liable to drain away; the modified polytetrafluoroethylene membrane has good hydrophilicity and persistence.

A bactericidal polymeric composition includes a hydrophilic first comonomer copolymerized to a second comonomer to produce a polymeric composition that is more hydrophilic or more bactericidal in an aqueous solution than either of the comonomers alone. Methods for identifying bactericidal polymers, methods for rendering materials bactericidal, and methods for using bactericidal compositions to kill or reduce bacterial growth are also described. Applications for the inventive compositions include their use in catheters, stents, medical devices, contact lenses; root canal fillers; and / or wound dressings.

The invention discloses a heater based on a transparent silver nanowire conducting thin film and a preparation method of the heater. The heater is simple in structure, uniform in heating and resistant to corrosion. The heater comprises a transparent substrate, the transparent conducting thin film, a conducting electrode and a protective layer. The heater is applied to defogging glass, a thermochromic substrate, a sensor substrate and the like. The preparation method of the heater comprises the steps of hydrophilization processing of the substrate, preparation of the transparent conducting thin film, preparation of the conducting electrode and preparation of the protective layer. According to the heater, silver nanowires synthesized through a low-temperature liquid phase method are used as raw materials, the transparent substrate is coated with the transparent conducting thin film through a non-vacuum non-high-temperature filming technology, the heating uniformity of the thin film is improved through technically mature and commercial conducting polymers, and the thin-layer protective film is obtained by means of liquid phase coating of cheap organic polymers. The heater is simple in structure, the raw materials are cheap, the requirement for preparation technological conditions is low, and large-scale production is facilitated.

The present invention discloses a preparation method of hydrophilic PVC alloy ultrafiltration membrane. PVC amphiphilic graft copolymer is synthesized through an atom-transfer-free radical polymerization method, which is taken as a hydrophilic modifier and is blended with PVC to prepare the PVC alloy ultrafiltration membrane with controllable structure, hydrophilicity, pollution resistance, large flux and high rejection rate by a solution transformation method. The hydrophilic chain of the amphiphilic graft copolymer can self-assemble and transfer to the membrane surface for microphase separation in the process of solution phase inversion, thus forming a relatively thin hydrophilic surface layer (dozens to hundreds of nanometers). The membrane preparation and hydrophilic modification are carried out simultaneously and the hydrophilic modification of membrane and the interior of the membrane hole can be achieved. The surface contact angle of the ultrafiltration membrane is less than 60 degrees and can be reduced to 0 degree within dozens of seconds; the water flux reaches above 500L / m<2> h(0.1Mpa); the BSA rejection rate reaches above 90 percent; the recovery rate of water cleaning flux is above 90 percent.

A production of voids between substrates is prevented when the substrates are bonded together, and the substrates are bonded together at a high positional precision while suppressing a strain. A method for bonding a first substrate and a second substrate includes a step of performing hydrophilization treatment to cause water or an OH containing substance to adhere to bonding surface of the first substrate and the bonding surface of the second substrate, a step of disposing the first substrate and the second substrate with the respective bonding surfaces facing each other, and bowing the first substrate in such a way that a central portion of the bonding surface protrudes toward the second substrate side relative to an outer circumferential portion of the bonding surface, a step of abutting the bonding surface of the first substrate with the bonding surface of the second substrate at the respective central portions, and a step of abutting the bonding surface of the first substrate with the bonding surface of the second substrate across the entirety of the bonding surfaces, decreasing a distance between the outer circumferential portion of the first substrate and an outer circumferential portion of the second substrate with the respective central portions abutting each other at a pressure that maintains a non-bonded condition.

The invention discloses a preparation method of a panchromatic structural color or color variation pattern array, belongs to the technical field of materials, and in particular relates to a method for preparing a panchromatic structural color or color variation pattern array by regulating the environment dielectric constants of an upper interface and a lower interface of a noble metal nanopore array. The preparation method comprises the following steps of: cleaning and surface hydrophilization treatment, the preparation of polystyrene single layer colloidal crystals, the construction for covering the noble metal nanopore array by a silicon oxide layer, the construction of a suspension noble metal nanopore array, selective regulation and control of the environment dielectric constant around the noble metal nanopore array and the like. The obtained noble metal nanopore array has a transmission peak adjustable within a visible light wave band (350nm-800nm), so that different single-color patterns or color patterns are shown, the apparent color of a single color sample can be changed along with the change of the external environment dielectric constant; and color change, disappear and reproduction of the array patterns can be realized for the color pattern sample along with the change of the external environment dielectric constant.

To provide a treated substrate having a hydrophilic region and a water repellent region, of which contrast is high on its surface. Further, to provide a process for producing a treated substrate, wherein a specific equipment, light having a high energy or light irradiation for a long time is not required, and the treated substrate can be produced with a low amount of light for a short time.A treated substrate having a hydrophilic region and a water repellent region on a surface of a substrate, characterized in that the water repellent region is made of a water repellent film formed by curing the composition (A) comprising a photopolymerization initiator and a compound (a) having at least one (meth)acryloyl group, and a water repellent moiety and having a film thickness of from 0.1 to 100 nm. A process for producing a treated substrate, characterized by using a hydrophilic substrate or carrying out a hydrophilic treatment on a surface of a substrate to make the surface hydrophilic, then forming a film containing the composition (A) on the surface, then forming a water repellent film having a film thickness of from 0.1 to 100 nm by irradiating light on a part of the film surface to cure the composition (A) and then removing an uncured composition (A) present on the surface of the substrate in order to expose the hydrophilic surface.

The invention discloses an amphipathic ternary molecular brush polymer and a nanocapsule. The amphipathic ternary molecular brush polymer has a general formula shown below, wherein A is a main polymer chain, B is a side lipophilic macromolecular chain, C is a side macromolecular chain with a hydrophilic chemical cross-linking structure, D is a side lipophilic macromolecular chain, and the side chains B, C and D are randomly grafted to the main chain A. The nanocapsule is obtained by dispersing the amphipathic ternary molecular brush polymer in an oil and water two-phase system for a chemical cross-linking reaction. The amphipathic ternary molecular brush polymer constructed multichannel nanocapsule, disclosed by the invention, solves the problem that a traditional segmented copolymer is difficult to adjust and control multiple channels of the nanocapsule efficiently; and the channel structure and size of the prepared nanocapsule are easy to adjust and controllable. As an emulsion self-assembling method is adopted for preparing the nanocapsule, simple operation is obtained and the nanocapsule is easy to prepare in a large scale; the prepared hollow nanometer nanocapsule covering amount is great; and the nanocapsule disclosed by the invention has a steady structure after hydrophilic chemical cross-linking. A-g-(B-r-C-r-D).

A hydrophilic microporous membrane comprising a thermoplastic resin, having been subjected to hydrophilizing treatment and having a maximum pore size of 0 to 100 nm, wherein when 3 wt % bovine immunoglobulin having a monomer ratio of 80 wt % or more is filtered at a constant pressure of 0.3 MPa, an average permeation rate (liter / m2 / h) for 5 minutes from the start of filtration (briefly referred to as globulin permeation rate A) satisfies the following formula (1) and an average permeation rate (liter / m2 / h) for 5 minutes from the time point of 55 minutes after the start of filtration (briefly referred to as globulin permeation rate B) satisfies the following formula (2):Globulin permeation rateA>0.0015 ×maximum pore size (nm)2.75   (1)Globulin permeation rate B / globulin permeation rate A>0.2 .   (2)

A selective membrane having a high fouling resistance. In one embodiment, the selective membrane is a composite polyamide reverse osmosis membrane in which a hydrophilic coating is applied to the polyamide layer of the membrane, the hydrophilic coating being made by covalently bonding a hydrophilic compound to residual acid chlorides of the polyamide membrane, the hydrophilic compound including (i) at least one reactive group that is adapted to covalently bond directly to the polyamide membrane, the at least one reactive group being at least one of a primary amine and a secondary amine; and (ii) at least one hydrophilic group, the at least one hydrophilic group being selected from the group consisting of a hydroxyl group, a carbonyl group, a trialkoxysilane group, an anionic group and a tertiary amino group; (iii) wherein the hydrophilic compound is devoid of a polyalkylene oxide group.

[Problems] To provide a novel hydrophilized separation membrane for use in the treatment of a liquid, which comprises an aromatic ether polymer, is less likely to be degraded by sterilization with a high energy ray and has a controlled pore size and a high water permeability.[Means for Solving Problems] A porous separation membrane for use in the treatment of a liquid which is produced by a wet film formation process using an aromatic ether polymer and a hydrophilizing agent. The separation membrane can be used for medical purposes or in a pharmaceutical of food.

The hydrophilic modification method of surface of ultrahigh molecular weight polyethylene microporous filtering membrane belongs to the field of ozone grafted ultrahigh molecular weight polyethylene microporous filtering membrane preparation technology. It is characterized by that it utilizes ozone to initiate graft reaction on the surface of microporous filtering membrane, it selects vinyl-acetic ester (VAc) as graft monomer, after graft reaction makes saponification hydrolysis to form polyvinyl alcohol (PVA) hydrophilic group. The obtained microporous filtering membrane has good hydrophilic property and moisture absorbability.

The invention relates to the field of water treatment materials, in particular to a preparation method of a graphene photo-thermal transformation material for sea water desalination and clean water treatment. The preparation method comprises the steps of preparing graphene powder, a polymer material with a chain molecule structure and a solvent into a sizing agent according to the proportion, adding into a mold for drying and heat treating so as to enable organic substances in the material to be carbonized, and obtaining a graphene foam material with favorable mechanism strength; carrying out hydrophilization treatment on one side of the bottom face of the graphene foam material, and obtaining the graphene photo-thermal transformation material for sewage and sea water distillation purification and desalination. According to the material, a black body structure and a high thermal conductivity property of graphene foams are utilized, so that sunlight can be high-efficiently transformed into heat; a capillary action of the foam structure is utilized for continuously conveying water and reducing an evaporation barrier, so that sea water is quickly distilled and desalted. A graphene foam material is utilized for manufacturing the portable high-efficient sea water desalination and sewage purification device, which meets the demand on quickly preparing clean freshwater on sea and outdoors.

The invention discloses a permanent hydrophilization modifying method of porous polypropylene film surface, which is characterized by the following: adopting amphipathic molecule with double bond on the hydrophobic end as hydrophilic modifier; immersing porous polypropylene film in the swelling agent with amphipathic molecule and photosensitive initiator; placing porous film under ultraviolet to irradiate; deswelling the surface in the vacuum based on amphipathic molecule with block structure as surface disposer; providing 'anchoring' action for polypropylene molecular chain; conferring hydrophilicity for porous polypropylene film surface; making surface-water contact angle at 35-40 deg after immersing 4 weeks.

The invention relates to a method for preparing a hollow silicon nano conical array, in particular to a method for preparing the hollow silicon nano conical array with large area, uniform bottom diameter length, controllable spacing, controllable period and orderly arrangement. The method comprises the following four steps: washing and surface hydrophilization treatment of a monocrystalline silicon piece, preparation of polystyrene monolayer colloidal crystals, preparation of a hollow silicon nano column array, and construction of a hollow silicon nano conical array. The hollow silicon nano conical array obtained by the method has the advantages of large area, uniform bottom diameter length, controllable spacing, controllable period and orderly arrangement, has extremely superior broad-band dereflection performance, and effectively reduces the surface reflection loss from deep ultraviolet band to medium infrared band (250 nanometers to 15 mu m). The method is simple and controllable, and has wide application prospect on construction of photoelectric devices with low cost and large area and deflection surfaces.

The invention discloses a preparation method of a modified polymer film material for effectively removing trace heavy metal ions in a water body, which comprises the following steps: 1) carrying out plasma treatment on a polymer film; 2) respectively preparing an initiator solution, a monomer solution, a buffer solution, an activating solution and a polyethylene polyamine water solution; 3) immerging the polymer film in the initiator solution, and carrying out surface activation by ultraviolet irradiation; 4) putting the polymer film into the monomer solution to carry out grafting reaction under ultraviolet irradiation; 5) activating the polymer film in the activating solution; and 6) putting the activated film into a polyethylene polyamine water solution to carry out coupling reaction, thereby preparing the modified film material capable of removing trace heavy metal ions in a water body. In the polymer film modifying process, carboxyl and amino groups are introduced to carry out hydrophilization and endow the modified film with complexing capacity, thereby removing the trace heavy metal ions. The invention has the advantages of simple technique, favorable treatment effect, wide application range, low cost, high unit mass adsorption capacity, time saving, high efficiency and energy saving.