34results about How to "Small surface pore size" patented technology

The invention discloses a micro-nano composite multi-porous membrane material, which uses polyimide (PI) nanofiber non-woven fabric as a base material, and the pores of the base material are filled with micro-nano Al2O3 particles; the micro-nano Al2O3 Particles, whose diameter is between 50-800nm, accounting for 20-50% of the total weight of the micro-nano composite multi-porous membrane material; the micro-nano composite multi-porous membrane material, whose porosity is between 30-60% , the surface average pore size is between 50-800nm, and the thickness is between 10-40μm. The micro-nano composite multi-porous membrane material provided by the invention is resistant to high temperature, heat shrinkage, high voltage and high current impact, and mechanical impact, and is suitable for use as a safe battery separator and a safe supercapacitor separator, and can be used to manufacture various high-capacity and high-capacity membranes. High power lithium battery or super capacitor. The invention also provides a preparation method of the nanocomposite porous membrane material and its application as a battery diaphragm.

The invention discloses a preparation method of a porous polyurethane film with a gradient porous structure. The preparation method is characterized by comprising the following steps: adding polyurethane into a solvent for dissolving, adding a pore-foaming agent, and mechanically stirring for a period of time to obtain suspension; defoaming the suspension in vacuum, carrying out film casting on a mold, carrying out curing film formation in absolute ethyl alcohol coagulation bath, soaking the film in deionized water to dissolve the pore-foaming agent and completely remove the pore-foaming agent; taking out the film, drying the film in a blast oven to obtain the porous polyurethane film with the gradient porous structure, the upper and lower surfaces of the porous polyurethane film are trim and not curled, and the hand feeling is good. The film can be used as artificial skin and has the advantages of good water and air permeability, high water absorption, excellent mechanical properties, good biological affinity, etc.

A method for preparing a palladium film on the surface of a macroporous carrier, using a dip coating method to cover a layer of organic modification layer on the surface of the porous carrier, and then using a sensitization-activation method to pre-coat a layer of palladium seed crystals on the surface of the polyvinyl alcohol modification layer , and then prepare a layer of palladium film on the surface of the organic modification layer by electroless plating, and finally remove the organic modification layer in the palladium composite film through high temperature heat treatment under the protection of an inert atmosphere, and obtain a palladium film with good hydrogen permeability. The use of organic materials to modify the porous carrier can not only effectively improve the surface roughness of the carrier and reduce the surface pore size, but also the organic modification layer can be removed by simple heat treatment after the electroless palladium plating film, which avoids the effect of the modification layer on hydrogen transmission. generated resistance. The method is simple, flexible, easy to operate and highly practical.

The invention discloses a composite multi-porous membrane material filled with PTFE-NP, which uses polyimide (PI) nanofiber nonwoven fabric as a base material, and the pores of the base material are filled with polytetrafluoroethylene nano-microspheres ( PTFE-NP); Described PTFE-NP, its diameter is between 100-300nm, accounts for 30-60% of the total weight of nanocomposite multi-porous membrane material; Described PI nanofiber non-woven fabric is thickness between 9 Electrospun PI nanofiber nonwoven fabric with a porosity between ‑38 μm, a porosity between 60‑80%, and a fiber diameter below 0.5 μm. The nanocomposite multi-porous membrane material provided by the invention is resistant to high temperature, heat shrinkage, high voltage and high current impact, and mechanical impact, and is suitable for use as a safe battery diaphragm and a safe supercapacitor diaphragm to manufacture various high-capacity and high-capacity Power lithium battery or super capacitor. The invention also provides a preparation method of the nanocomposite porous membrane material and its application as a battery diaphragm.

The invention discloses a palladium composite membrane taking multihole FeAlCr as substrate and a preparation method thereof. The palladium composite membrane is composed of a multihole FeAlCr substrate tube, a home position oxidation layer, a ceramic transition layer and palladium alloy membrane. The preparation process thereof includes the following steps: firstly, a multihole FeAlCr substrate tube is prepared; secondly, home position oxidation is adopted to form a dense home position oxidation layer on the surface of the multihole FeAlCr substrate tube; thirdly, a ceramic transition layer is coated; fourthly, palladium alloy is coated on the surface of the multihole FeAlCr substrate tube provided with the ceramic transition layer, and heat treatment is carried out, so as to form palladium alloy membrane, thus obtaining the palladium composite membrane. The preparation process of the invention is simple, and design is reasonable. The palladium composite membrane which takes multihole FeAlCr as substrate and is prepared by adopting the invention has high hydrogen permeability, strong hydrogen corrosion resistance and long service life, can be effectively applied to purification and separation of hydrogen and is especially applied to purification and separation of hydrogen isotope.

The invention discloses a preparation method of a multi-hole metal tube surface zirconia intermediate layer. The preparation method comprises the following steps of mixing zirconium powder and water or absolute ethyl alcohol, evenly stirring to prepare powder suspension; enabling two ends of a multi-hole metal tube to be connected with a circulation water type vacuum pump through flexible tubes, then immersing the multi-hole metal tube in the powder suspension, opening the circulation water type vacuum pump to suck under negative pressure, holding the zirconium powder in the powder suspension on the surface of the multi-hole metal tube, forming a layer of zirconium film, and finally airing at room temperature; igniting one end of the zirconium film until combustion reaction spreads to the other end of the zirconium film to obtain the multi-hole metal tube surface zirconia intermediate layer. The preparation method does not need large scale equipment and is simple in process, simple and convenient to control, energy-saving and environment-friendly, and the multi-hole metal tube surface zirconia intermediate layer prepared by the preparation method can effectively reduce surface hole diameter of the multi-hole metal tube, improve bond strength of a zirconia film and the multi-hole metal tube and prolong service life of palladium composite film.

The invention discloses a nanocomposite multi-porous membrane material, which uses polyimide (PI) nanofiber non-woven fabric as a base material, and the pores of the base material are filled with composite nanoparticles; it is characterized in that: the composite The nanoparticles are composed of polytetrafluoroethylene nanospheres (PTFE-NP) and aluminum nitride nanoparticles (AlN-NP) mixed in a weight ratio of (7-12) / (8-13). The nanocomposite multi-porous membrane material provided by the invention has high temperature resistance, high hardness, moderate porosity, moderate areal density, good ion transport and excellent mechanical properties. The imide nanofiber diaphragm causes the problem of micro-short circuit of the battery due to high porosity; it can solve the serious problem of thermal runaway caused by mechanical collision of power lithium-ion batteries.

The invention discloses an oral slow release preparation, an entrapment material and a preparation method. A sodium alginate-sodium hyaluronate mixture is taken as an entrapment material; and a prepared protein polypeptide medicament oral slow release preparation consists of the following components in percentage by mass: 0.5-10 percent of medicament and 90-99.5 percent of sodium alginate-sodium hyaluronate mixture. According to the oral slow release preparation, the conventional administration way of a protein polypeptide medicament is changed, the acting time of the protein polypeptide medicament is prolonged, the normal blood sugar level is maintained successfully for 12 hours when exenatide oral microspheres are taken as an example, the administration compliance of a diabetes patient is improved remarkably, and the treatment effect is enhanced.

The invention discloses a nanocomposite multi-porous membrane material, which uses polyimide (PI) nanofiber non-woven fabric as a base material, and nano boron nitride particles are filled in the pores of the base material; the nano boron nitride Boron particles, whose diameter is between 50-100nm, accounts for 30-60% of the total weight of the nanocomposite multi-porous membrane material; the thickness of the PI nanofiber nonwoven fabric is between 9-38 μm, and the porosity is between 60-38 μm. Between 80%. The nanocomposite multi-porous membrane material provided by the invention is resistant to high temperature, heat shrinkage, high voltage and high current impact, and mechanical impact, and is suitable for use as a safe battery separator and a safe supercapacitor separator, and can be used to manufacture various high-capacity and high-voltage membranes. Power lithium battery or super capacitor. The invention also provides a preparation method of the nanocomposite porous membrane material and its application as a battery diaphragm.

The invention relates to a material for filter pressing of superfine slurry and a manufacturing method of the material. The material is composed of a basic material layer with a pore diameter and a superfine pore filtering layer arranged at the upper part of the basic material layer, and the material is characterized in that an adhesive cement curing layer is used as the superfine pore filtering layer; superfine pore diameters are distributed on the adhesive cement curing layer; and the adhesive cement curing layer is formed by mixing a resin material, an inert grain, a volatilizable solvent and a curing agent, and drying and curing. The manufacturing method disclosed by the invention is simple in process and low in cost; and the material for the filter pressing of the superfine slurry has the advantages of guaranteeing the superfine pore diameters and reducing filter pressing resistance.