129 results about "Basal membrane" patented technology

This invention relates to a transdermal delivery system for treating skin related diseases employing protein nanoparticles to deliver drugs to the keratinocytes and basal membrane cells for the treatment of non-melanoma skin cancer. The current invention presents an effective method for delivering small molecule nucleic acids to the epidermal cells.

This invention relates to a transdermal delivery system for treating skin related diseases employing papilloma-derived protein nanoparticles to deliver drugs to the keratinocytes and basal membrane cells for the treatment of alopecia. The current invention presents an effective method for delivering small molecule nucleic acids to the epidermal cells.

This invention relates to a transdermal delivery system for treating skin related genetic diseases. More specifically, the present invention provides particles and methods for using pseudo-viruses, including those derived from the herpes and papillomaviruses, to deliver drugs to keratinocytes and basal membrane cells for the treatment of skin genetic disorders including Pachyonychia Congenita and Xeroderma Pigmentosum.

This invention relates to a transdermal delivery system for treating skin related diseases employing protein nanoparticles to deliver drugs to the keratinocytes and basal membrane cells for the treatment of Psoriasis. The current invention presents an effective method for delivering small molecule nucleic acids to the epidermal cells.

The invention relates to an ethanol-permselective PDMS/PVDF multilayered composite membrane and the preparation method, which belongs to a pervaporation membrane separation field. The multilayered composite membrane is made based on the following processes: firstly, the PVDF porous basal membrane is prepared by a two-faced wiped film of kynoar polyvinylindene fluoride (PVDF) solution on the polyester non-woven fabric support layer using submersion and sedimentation transformation method; secondly, the membrane liquid, which contains dimethyl silicone polymer (PDMS), cross linking agent and catalyst, is prepared, and the PVDF porous basal membrane is immersed in the membrane liquid for 10s-1min. Each of two sides of the PVDF basal membrane are coated with a layer of silicone base by using immersion and painting method, and then the PVDF basal membrane is dried and cross linked, and so the multilayered composite membrane is made. The existing pure PDMS membrane has bad separability to ethanol aqueous solution, and the highest separation factor is 10.8 ([EtOH] equals to 8wt percent, 30 DGE C). The multilayered symmetrical composite membrane made of the invention has an excellent ethanol-permselective property to low concentration ethanol aqueous solution (5wt percent-30wt percent), and for the ethanol aqueous solution which has a concentration of 5wt percent, the separation factor ¿” value equals to 15, and the permeation flux J equals to 450g/m²h, under the temperature of 60 DGE C.

The invention relates to a production method of an environment-friendly water-soluble gum electrochemical aluminothermic transfer printing film. The production method comprises the following steps: a PET film of 6 to 15 micron is adopted as a carrier film; the carrier film is sequentially provided with four coatings such as a releasing layer, a color layer, an aluminum layer and an adhesive layer; wherein the releasing layer, the color layer and the adhesive layer coat the coating materials on a PET basal membrane substrate by a smooth roll or an anilox roll in a forward coating mode or backward coating mode; the aluminum layer is spray-plated in a vacuum spray-plating mode; the invention adopts the environment-friendly material and the production technique to produce the aluminothermic transfer printing film product, and the key points are as follows: solvent based acrylic resin, ethylene-vinyl acetate resin, ketone resin and cellulosic resin hot melt adhesive are changed into cellulose acetate and products made by cellulose acetate; and vinyl cellulose, polyvinyl butyral and powdery silicon dioxide are synthesized by water and a mixed solvent in a mode of wetting and dispersing. The production method has the characteristics of having no solvent residue harmful to human body and being beneficial to environmental protection and the like.

The invention relates to a self-assembly method of inorganic nano particle hybridization organic membrane. The method comprises steps of: respectively dissolving polycation and polyanion in a dissolvent, preparing to form a membrane casting solution, standing and defoaming; adding inorganic nano particle into a polyanion solution to prepare a polymer nano particle solution; soaking or dynamically filtering polyanion nano particle solution or polycation solution on the surface of a substrate or basal membrane for 10 to 60 minutes to form a thin membrane layer. The substrate or the basal membrane is soaked or dynamically filtered in the polycation solution or polyanion nano particle solution for 10 to 60 minutes; the polyanion nano particle solution reacts with the polycation to form the thin membrane layer; the substrate or the basal membrane is soaked in deionized water, and the membrane surface is rinsed and dried. When the polycation or the polyanion nano particle solution is filtered on the basal membrane, the transmembrane differential pressure thereof is 0.01 to 0.3MPa or minus 0.02 to minus 0.09MPa. The membrane forming method is simple; the thin membrane prepared on the substrate is compact and uniform; the membrane formed on the basal membrane has excellent penetration and vaporization separating property and mechanical strength.

The invention discloses a homogeneous anion exchange membrane as well as the preparation method thereof. The invention is characterized in that the homogeneous anion exchange membrane takes chloromethylated styrene, styrene or/and alkyl styrene as monomers, takes divinyl benzene as a cross-linking agent, takes benzoyl peroxide or azobisisobutyronitrile as an initiator, and takes bromomethylation poly (1,4- dimethyl2, 6- phenylene oxide) or chloroacetylized poly (1,4-dimethyl2, 6-phenylene oxide) as a polymer reinforcing agent, so as to prepare a uniform solution which is used for pasting a membrane on reinforced fabrics, and the homogeneous anion exchange membrane can be obtained by pretreating a basal membrane obtained by polymerization and then carrying out quaternary ammoniation. The invention obtains a functional group through adopting aromatic polymer, thereby the obtained anion exchange membrane has high exchange capacity, good electrochemical properties, uniform structure and good heat resistance; the slurry is homogeneous, thereby being easy for pasting; the monomers serving as the solvent can be polymerized, thereby being a green and solvent free process; the polymer content and the cross-linking degree can be adjusted, and the types of the sustainer can be changed, thereby obtaining products with different structural morphologies and functions.

The invention discloses a technology for preparing a polyphenyl sulfide composite film. The technology is realized in such a way that: polyphenyl sulfide resin is used as a main body, and coupled mixed inorganic filler is added; and the coupled mixed inorganic filler and polyphenyl sulfide are blended and extruded by a twin screw extruder to prepare a master batch, the master batch is added to the polyphenyl sulfide, which is granulated once, to be fused, blended and extruded, and a biaxially oriented film is prepared. The film has favorable combination properties: the melting point is higher than that of polyphenyl sulfide, the heat distortion temperature is above 163 DEG C, the variation in thickness is not higher than 4%, the surface roughness is smaller than or equal to 0.20 mum, and the thermal shrinkage percentage is smaller than or equal to 1% at 250 DEG C. The invention has the advantages of relatively lower production cost, and is especially suitable for being used as a basal membrane for magnetic recording media, and an insulating material for capacitors and other electronic components and equipment.

The invention discloses a self-assembly method for a high-load inorganic nano particle hybridized organic membrane, which belongs to the technical field of membranes. The method comprises the following steps of: preparing membrane-forming solution from polycations and polyanions respectively, adding amphoteric oxide nano particles respectively, and adjusting pH values; performing ultrasonic treatment and centrifugation, and replacing solvents to prepare polyion nano particle envelope solution; impregnating a substrate or a basal membrane in the polyion nano particle envelope solution or performing dynamic filtration to form a membrane layer, and performing washing and blow-drying; impregnating the substrate or the basal membrane in the polyion nano particle solution loaded with opposite charges; performing the washing and the blow-drying; and repeating the membrane-forming, the washing and the blow-drying to form an inorganic nano particle hybridized polyelectrolyte membrane. The method has the advantages of hybridizing a polycation layer and a polyanion layer with the nano particles, improving the charge numbers of the nano particles in the double layers and effectively overcoming the defect of easy stripping of organic and inorganic layers of the prepared membrane during hybridization.

The invention discloses a method for preparing surface crosslinking polymeric quaternary ammonium salt antibacterial composite film, and the method comprises the following steps: firstly, polymeric monomer and initiator are mixed for carrying out bulk thermal polymerization, so as to prepare a polymer; secondly, a basal membrane such as a microporous polypropylene membrane, etc. is arranged in the obtained polymer solution to be soaked for a specific time, and then is taken out for airing, so as to enable the polymer to form a deposition layer on the membrane surface; thirdly, the polymer deposition layer on the surface of the basal membrane undergoes situ crosslinking, and is quaternized; fourthly, the unreacted crosslinking agent and the uncrosslinked polymer on the membrane surface are cleaned, and the antibacterial composite film can be obtained after drying. The method is economical and simple, and has universality; the prepared antibacterial composite film is stable and durable, and the antibacterial effect is obvious.

A monolithic bipolar membrane and a preparation method thereof relate to functional polymer membrane materials. The monolithic bipolar membrane includes a cation exchange layer and an anion exchange layer. Preparation method 1: basement membrane pre-irradiation; simultaneous grafting on both sides; sulfonation; quaternization. Preparation method two: basement membrane pre-irradiation; double-sided step-by-step grafting; sulfonation; quaternization. The preparation of bipolar membranes by radiation grafting technology not only saves the film-forming process in the traditional bipolar membrane preparation process, but also does not need to add initiators and catalysts during the grafting process, and the prepared bipolar membranes are very uniform and pure. The steps are simple, and the thermal stability and chemical stability of the film are better. Even if it is used for a long time, there will be no problems such as bubbling and cracking in the middle interface layer that are easy to occur during the use of composite bipolar membranes. Good mechanical properties, thermal stability and chemical stability. Avoid the use of strong carcinogenic reagents such as chloromethyl ether, and reduce the harm to the human body and the environment.

The invention relates to a hollow fiber nanofiltration membrane. A polyacrylonitrile (PAN) ultrafiltration membrane is used as a basal membrane and the hollow fiber nanofiltration membrane is prepared by performing alkali wash, acid wash and amination sequentially by the chemical composite method, wherein the effective aperture of a membrane pore is 0.5 to 2 nanometers, the internal diameter of a membrane yarn is 0.5 to 1 mm and the external diameter of the membrane yarn is 1 to 1.6 mm. Without the processes of interface coating, or polymerization, and crosslinking, the hollow fiber nanofiltration membrane is prepared by utilizing low-price acid and alkali and through the simple acid washing and alkali washing processes, so that the use of high-cost polymeric materials is avoided, the production time is shortened; and the basal membrane is subjected to chemical combination to generate the nanofiltration membrane through simple process and in economical cost and short time.

The invention relates to the technical field of an optical thin film, in particular to an optical diffusion film and a preparation method thereof in order to solve the defects that diffusion particles in the traditional optical diffusion film have poor cohesive force with a bonding resin and a basal membrane, and the traditional the optical diffusion film needs to be processed after being coated and is complex in technology. The optical diffusion film provided by the invention is of a three-layer structure and comprises a base material; and a diffusion layer is arranged at the at least one side of the two sides of the base material and comprises scattering particles with the particle size of 1-60mum. The diffusion particles in the optical diffusion film provided by the invention have better cohesive force with the bonding resin, good surface anti-adhesion performance and optical performance; and the preparation method optical thin film comprises three-layer co-extrusion and two-way stretching technologies and is simple to operate.

The invention provides a bi-ear time delay estimating method based on frequency division and improved generalized cross correlation in reverberation environment, and relates to the field of sound source positioning. A Gammatone filter is used to effectively simulate characteristics of a basal membrane of a human ear, voice signals are subjected to frequency division processing, and two-ear cross-correlation delay is estimated under a reverberation environment. Compared with a generalized cross correlation delay estimating method, the method can estimate time delay more accurately. The sound source positioning system has better robustness. A Gammatone filter is used to conduct frequency dividing processing for bi-ear signals, and each sub-band signal is subjected to inverse transformation to a time domain after reverberation processing of cepstrum and pre-filtering. Each sub-band signal of left and right ears are subjected to generalized cross correlation operation, an improved phase transformation weight function is employed in a generalized cross correlation algorithm to obtain cross correlation value of each sub-band for summing operation, and the bi-ear time difference corresponding to maximal cross correlation value is obtained.

The invention discloses an insert mold transcription film including three-dimentional patterns of metal texture and a method for fabricating the same. According to the method, a release layer is formed on a basal membrane and a semi-rigid UV coating layer is formed on the release layer. Then a printing layer is formed on the semi-rigid UV coating layer and a three-dimensional pattern layer is formed on the printing layer by transparent ink. A metal layer is arranged on the surface of the three-dimensional pattern layer and an adhesive layer is formed on the metal layer. Various luxurious metallic textures of line patterns are exhibited by the invention.

The invention relates to a food freshness indicator card taking indicated CO2 as a characteristic gas and a manufacturing method of the food freshness indicator card. The manufacturing method comprises the following steps: firstly, crushing a polylactic acid sample, dissolving by chloroform, after heating in water bath, laying on a clean glass grinding tool through a tape-casting process, and drying to prepare a basal membrane; and dissolving bromothymol blue powder and methyl red powder in an ethanol solution, after stirring, uniformly mixing with polyethylene glycol and methylcellulose powder, laying on the basal membrane, drying to obtain the indicator card, independently packing the indicator card, and adding a drying agent into the indicator card for controlling the humidity surrounding the indicator card and improving the accuracy of discoloring generated after CO2 is absorbed by the indicator card. According to the manufacturing method, a self-made polylactic acid membrane is used as the indicator card basal membrane and is smooth in surface, uniform in texture and bright and translucent in appearance, and thus vision errors are furthest reduced. Due to invention and application of the freshness indicator card, consumers can purchase healthy and high-quality foods, and Chinese food safety is greatly improved.

The invention relates to a composite nanofiltration membrane, especially relates to a composite nanofiltration membrane employing an aliphatic sulfonate condensation product as an anion polyelectrolyte. The composite nanofiltration membrane comprises a basal membrane layer and a composite membrane layer in order, and the composite membrane layer is formed by static self assembly of the cation polyelectrolyte and the anion polyelectrolyte, wherein, the anion polyelectrolyte is an aliphatic sulfonate condensation product solution. The aliphatic sulfonate condensation product is used as an anion polyelectrolyte, and compared with the present anion polyelectrolyte and aliphatic sulfonate condensation product has a lower cost, thereby reducing the cost of the prepared composite nanofiltration membrane, and improving the separating performance for Ni2+, Ca2+ divalent metal ions and xylenol orange, rhodamine B and other dye molecules in heavy metal ion waste water and dye waste water by the prepared composite nanofiltration membrane.

The invention discloses a compound double-side copper clad laminate and the manufacturing method thereof. The compound double-side copper clad laminate is manufactured in the way that a non-adhesive single-side copper-clad laminate composed of a copper foil and an insulating basal membrane formed on one surface of the copper foil is hot-pressed with an adhesive copper foil laminate composed of another copper foil and an insulating assembly glue layer applied on one surface of the copper foil under the condition of low temperature. The problems of adopting a high-temperature pressing processing procedure in the prior art and using expensive raw material of TPI can be avoided, and the compound double-side copper clad laminate meeting the requirements of characteristics of a non-adhesive double-side laminate can be obtained, so that not only is the manufacturing cost saved, but also the production yield of products can be improved, the application range of the products is expanded; and the compound double-side laminate provided by the invention has excellent dimensional stability and bending resistance and has the advantages of masking effect, high heat resistance and high reflectivity.

An object of the present invention is to provide an artificial tissue construct that has means for transporting nutrients, oxygen, waste products, or the like and is viable in vivo. The present invention relates to a tissue construct formed in vitro, which comprises a vascular layer, a basal membrane layer, and a tissue-forming cell layer.

Anti false identifier includes special type printing layer, basal membrane, fluorescent layer, protective layer, particularity detection layer, vacuum plating copper layer, laser hologram layer, regular engraved tearing off layer, protective coat layer of chemical etched pattern and not dried glue layer. The manufacturing procedure includes following steps: raw material, printing fluorescent layer, coating protective layer (information layer), coating particularity detection layer, vacuum plating copper, hologram molding etc. Multiple anti false techniques are integrated on the identifier, possessing advantages of easy use and easy recognition.

The invention provides aramid fiber coating liquid, a lithium-ion battery separator and preparation methods thereof, and relates to the field of materials for lithium-ion batteries. The preparation method of the aramid fiber coating liquid comprises the following steps of: dispersing aramid fibers in a third solvent, adding a pore-forming agent, uniformly stirring, then mixing with a tackifying material and inorganic filler slurry, and stirring for 1-2 hours, wherein the tackifying material is prepared by mixing a binding agent and a first solvent; and the inorganic filler slurry is prepared by mixing inorganic filler and a second solvent. The preparation method of the lithium-ion battery separator comprises the following steps of: coating at least one side of a basal membrane by using thearamid fiber coating liquid to form oily coating; and then extracting the oily coating in sequence by using a third solvent and water, and soon afterwards drying the oily coating extracted by water at the temperature of 40 to 90 DEG C. The lithium-ion battery separator provided by the invention has excellent heat shrinkage resistance and coating adhesive property; the cohesive force of the lithium-ion battery separator is 30-40 N/m; and the heat shrinkage of the lithium-ion battery separator is less than or equal to 5% (130 DEG C).

The invention relates to the technical field of coating materials and particularly relates to an organosilicone super-hydrophobic coating material, a preparation method therefor and an application of the organosilicone super-hydrophobic coating material. The preparation method for the organosilicone super-hydrophobic coating material comprises the steps: (1) carrying out basal membrane activation: irradiating a basal membrane or soaking the basal membrane in an acidic hydrogen peroxide solution, so as to activate the basal membrane; (2) carrying out micro-/nano-rough surface construction: soaking the activated basal membrane in sol-gel, and carrying out a condensation reaction between hydroxyl groups, so as to form a micro-/nano-rough structure on the smooth surface of the basal membrane; and (3) carrying out low-surface-energy coating modification: coating or spraying the micro-/nano-rough surface of the basal membrane with the organosilicone super-hydrophobic coating material, and carrying out baking, thereby obtaining an organosilicone super-hydrophobic coating. According to the application, a food product packaging film has super-hydrophobic performance, the water contact angle reaches 158 degree, the water roll angle reaches 10 degrees or below, the yoghurt contact angle reaches 153 degrees; and furthermore, the food product packaging film further has the advantages of safety and no toxicity.

The invention discloses a low-resistance high-flux soiling resistant type water treatment membrane. The membrane takes a sulfonated polyethersulfone-polysulfone/TiO2 ultrafiltration membrane as a template, FeCl2 as a reducing agent; Fe3O4 nano particles are generated through in-situ chemical sedimentation in basal membrane aperture passages so that Fe3O4/sulfonated polyethersulfone-polysulfone/TiO2 ultrafiltration membrane is obtained. The invention also discloses a preparation method for the water treatment membrane. The invention has the benefits that TiO2 and membrane material are mixed to enhance the hydrophilcity of the membrane, enlarge membrane flux, improve membrane surface rough degree, delay membrane fouling and prolong membrane service life; with the polyethersulfone, superior chemical stability, heat resistance and mechanical strength are provided; the Fe3O4 is adopted as magnetic medium to combine the magnetic ultrafiltration membrane, and continuous separation of series of materials of different molecular weight ranges is realized through adjusting additional magnetic field. Compared with the prior art, the membrane has the advantages of small resistance, large flux, soiling resistance, long service life and the like.