166 results about "Ion permeation" patented technology

An ophthalmic lens is disclosed which is suited for extended-wear periods of at least one day on the eye without a clinically significant amount of corneal swelling and without substantial wearer discomfort. The lens has a balance of oxygen permeability and ion or water permeability, with the ion or water permeability being sufficient to provide good on-eye movement, such that a good tear exchange occurs between the lens and the eye. A preferred lens is a copolymerization product of an oxyperm macromer and an ionoperm monomer. The invention encompasses extended wear contact lenses, which include a core having oxygen transmission and ion transmission pathways extending from the inner surface to the outer surface.

An object of the present invention is to provide a separator for a nonaqueous secondary battery having excellent heat resistance and excellent ion permeation as well as shut-down properties. The first invention is a separator for a nonaqueous secondary battery, comprising a porous composite membrane which includes a substrate comprising a polyolefin microporous membrane and a heat-resistant porous layer comprising a heat-resistant resin, the heat-resistant porous layer being formed on at least one surface of the substrate, wherein the separator is characterized in that the sheet resistance (A) of the substrate, the Gurley value (B) of the substrate, the sheet resistance (C) of the porous composite membrane, and the Gurley value (D) of the porous composite membrane satisfy a specific relationship. The second invention is characterized in that the heat-resistant porous layer has an average pore size of 0.1 to 0.2 μm as measured by mercury intrusion porosimetry. The third invention is characterized in that the heat-resistant resin fibrils have an average fibril diameter of 10 to 80 nm, and the pores in the heat-resistant porous layer have an average pore size of 50 to 250 nm.

The invention discloses polymer modified rubber mortar for a building leveling layer. The polymer modified rubber mortar is formed by doping three modified materials including rubber powder, a polymer and an organic fibre into modified cement mortar. The polymer modified rubber mortar is formed by mixing the following components in parts by weight: 30-40 parts of cement, 5-20 parts of water, 2-10 parts of the polymer, 50-90 parts of sand, 5-15 parts of the rubber powder, 0.05-0.15 part of the organic fibre, 0-5 parts of mineral admixtures, 0-1 part of an auxiliary, and 0-0.5 part of an additive. According to the freshly-mixed polymer modified rubber mortar, the thickness is controlled to be 7cm, during the curing period of 7 days, the compressive strength of the mortar is not less than 10 MPa, the rupture strength is not less than 3.5 MPa, during the curing period of 28 days, the compressive strength of the mortar is not less than 15 MPa, the rupture strength is not less than 5 MPa, the chloride ion permeation coefficient is not larger than 50*10<-14>m<2>/s, and the heat conductivity coefficient is not larger than 0.5W/m.k. The polymer modified rubber mortar disclosed by the invention can be used for effectively solving the problems of sugaring, peeling, crispiness, bulging, cracking and the like existing in the traditional cement mortar leveling layer, has the performance advantages of permeability resistance, crack prevention, thermal insulation, high tenacity and the like, can fully utilize waste rubber, can turn waste into wealth, and is suitable for various building leveling layers.

The invention discloses a method for preparing a nanoparticle water reducing agent, which belongs to the technical field of the preparation of building material admixtures. The water reducing agent at a certain doping amount can achieve the dispersing and water reduction effects at the early stage of cement paste; meanwhile, the water reducing agent has the functions of room-temperature film formation and emulsion modification, so the comprehensive performance of cement concrete such as late-stage waterproofness, compactness, chloride ion permeation resistance, mechanical properties, durability and the like can be greatly improved. The nanoparticle water reducing agent can be widely applied to the fields of railways, bridges, tunnels, dams, offshore engineering, remedial works and the like.

The invention discloses a saline-alkali tolerant high polymer modified asphalt polyester reinforcement waterproof coiled material, which comprises a layer of high-strength long fiber polyester reinforcement (PY) with the thickness ranging from 1.2mm to 1.4mm. Special super-viscous SBS (styrene-butadiene-styrene block copolymer) and chemical saline-alkali tolerant accessories are covered on two surfaces of the polyester reinforcement to modify rubber asphalt, and the polyester reinforcement, the modified rubber asphalt and a PE (polyethylene) black film or fine sand materials are jointly used for preparing the saline-alkali tolerant high polymer modified asphalt polyester reinforcement waterproof coiled material by the aid of special process. The saline-alkali tolerant high polymer modified asphalt polyester reinforcement waterproof coiled material realizes excellent chlorine ion permeation performance and saline-alkali tolerance when used in building waterproofing engineering in coastal areas and high-saline and high-alkali areas, and can effectively prevent a building structural main body from being eroded by corrosive media.

The invention provides a method for repairing and reinforcing pile foundations in ocean splash zones. The method is characterized by comprising the following steps: firstly carrying out interface treatment on the splash zones and the zones needing repair near the splash zones aiming at different pile body types, fixing end hoops for bearing upper construction loads on the lower edges of the repaired zone, installing external molds and then continuously pouring a self-compaction ultra high toughness cementitious composite (UHTCC). The method has the following beneficial effect: erosion of dry-wet alternation and chloride ion permeation in the splash zones, temperature difference and sea wave impact effect can be effectively resisted, thus ensuring the durability of pile bodies under the environmental condition of severe corrosion.

The invention relates to a method for sealing a liquid reservoir for a liquid flow battery, which comprises the following steps of: installing a seal cover on the liquid reservoir, filling the liquid reservoir with electrolyte, and sealing the liquid reservoir; indirectly sealing the sealed liquid reservoir with liquid or gas. The pressure in the liquid reservoir indirectly sealed by the liquid or gas always stays at one standard atmospheric pressure. The liquid or gas used for indirect sealing is sealing liquid or sealing gas. The sealing liquid or sealing gas and the liquid reservoir are connected through a conduit. One end of the conduit is outside the liquid reservoir. The invention has the advantages that the sealing method is simple, convenient and efficient; the problem of inconsistent charging states of battery anode and cathode caused by oxidation of low-valence ions and the problems of ion permeation, water permeation, membrane aging and the like caused by the problem of pressure unbalance are solved; the service life of the membrane can be effectively prolonged; and the coulomb efficiency of the liquid flow battery is improved and the service life of the liquid flow battery can be effectively prolonged.

The invention relates to a method for rapidly determining the chloride ion permeation resistance of concrete. The method comprises the following steps: slicing concrete, putting the obtained sliced concrete into a vacuum water-saturated device, pumping to a certain vacuum degree, injecting deionized water to the obtained vacuum chamber, and maintaining the vacuum degree for a certain period of time to make apertures in the concrete full of water; and carrying out alternating current impedance test of a test piece to obtain a characteristic conductivity, and calculating via a conversion formula to obtain an equivalent dielectric flux in order to evaluate the chloride ion permeation resistance of concrete. The method has the advantages of determination of the dielectric flux of concrete within a very short period of time, simplicity, reliable data, no less, and realization of multi-time test of the same test piece.

The invention relates to application of a basic porous membrane in a liquid flow energy storage battery. According to the basic porous membrane, polyaromatic resin containing chloromethyl or bromomethyl group is used as a matrix and can be blended with other resins, and a basic group is grafted on the chloromethyl or bromomethyl group of the matrix, wherein the content of matrix in the blended resin is 5-100 percent by weight. The basic porous membrane is simple in preparation method, controllable in pore diameter and adjustable in content of basic groups, and large-scale production can be easily realized. According to the basic porous membrane, the ionic conductivity of a diaphragm can be effectively improved, vanadium ion permeation can be effectively prevented due to the action of electrostatic repulsion, and the energy conversion efficiency of a full-vanadium liquid flow battery can be greatly improved.

The invention relates to a self-electroosmosis hydrogel adhesive film, which combines an electrochemical primary batter consisting of two polar materials with different electrochemical potential difference with functional active substance-containing hydrogel. A method for manufacturing the self-electroosmosis hydrogel adhesive film comprises the following steps of: printing conductive paste on an organic film to form a collector layer; producing a positive electrode layer and a negative electrode layer and printing the positive electrode layer and the negative electrode layer on the collector layer respectively; adhering all the layers on a non-woven fabric substrate; coating a conductive adhesive layer on the two electrodes respectively; and coating a functional active substance-containing hydrogel layer on the conductive adhesive layer. During use, the hydrogel adhesive film is contacted with the skin of a human body, and the two electrodes and the skin of the human body form a current loop through the hydrogel comprising a certain amount of moisture, so that permeation rate of the active substance can be increased and the adsorption rate of the skin on the active substance can be increased. The hydrogel adhesive film has the advantages of overcoming the defects that a power supply needs to be added, the film cannot be used at any time and the cost is high in the conventional ion permeation technique, and effectively increasing the permeation rate of the functional active substance, along with simple structure, low cost, convenient storage and carrying and convenient use.

The invention discloses a method for preparing a natural high-molecular material by the utilization of rare earth metal ion coordination. Through strong coordination between rare earth metal ion and oxygen atom in carboxyl function group, the rare earth metal ion coordinated natural high-molecular material is prepared by an ion permeation and diffusion method. According to the method, carboxyl-modified graphene oxide is introduced into the natural high-molecular material such that mechanical strength of the material is enhanced and structural regularity of the material also can be boosted. By selecting one ingredient from sodium alginate and xanthan gum as the base material, the material can be endowed with good biocompatibility and biodegradability. The method of the invention is simple and feasible. Reaction condition is mild. The prepared natural high-molecular material has good biocompatibility and strong mechanical properties.

The invention relates to a concrete with anti-cracking, anti-seepage and high-durability effects and a preparation method thereof. The concrete is prepared from the following components of cement, flyash, silicon powder, coal gangue powder, boron nitride, phosphor residue powder, sand, crushed stone, high-strength polyvinyl alcohol fiber, a water reduction agent, a dispersing activator, a modified graphene oxide dispersion liquid and water. The concrete has the advantages that the heat conduction coefficient in the 1h age period is 2.9 to 3.7W/(m.K), the heat conduction coefficient in the 28-day age period is 3.5 to 4.7W/(m.K), the compressive strength is 67.6 to 98.3MPa, the break strength is 13.3 to 16.8MPa, the split strength is 9.3 to 9.8MPa, the tensile strength is 8.3 to 10.7MPa, and the tensile elastic modulus is 44.5 to 51.4GPa; the anti-water permeation property, anti-chlorine ion permeation property, anti-freezing and thawing property, and anti-carbonizing property can reachthe highest level; the working property is high, the volume stability is high, the durability is high, the toughness is high, the anti-cracking ability is high, and the anti-seepage ability is high.

The invention relates to a simultaneous interpenetrating silicon hydrogel and a preparation method thereof, and the synchronous forming of two networks can be triggered by simple light or heat. One network is a hydrophilic network, and obtained by free radical polymerization; the other network is obtained by a chemical reaction between polyisocyanate as a crosslinking agent and hydroxyl containing polysiloxane, and specifically, is prepared by mixing the hydroxyl containing polysiloxane, a polymerization monomer and the crosslinking agent, and adding an initiator, a catalyst and the like for one-step curing. The hydrophilic network gives the material water absorbing and ion permeation properties; and the organosilicone network gives the material high oxygen permeability. The simultaneous interpenetrating silicon hydrogel has good biocompatibility, and can be used for biomedical materials, such as a corneal contact lens, medical implant materials, artificial skin, a drug delivery carrier and the like.

The invention discloses a PDVF coating method for a battery separator and aims at providing a PDVF coating method for a battery separator with the advantages of reducing a barrier of a coating layer to ion permeation and improving the energy density of a battery on the premise of not affecting surface modification of the separator. According to the main points of the technical scheme, atomized droplets with PVDF particles are sprayed on the surface of a base layer of the battery separator or coat the surface in a spinning manner, the atomized droplets are dried to form a plurality of point sediments and a modified layer is formed. According to the PDVF coating method, the interaction between a coating and the separator can be reduced and the resistance when ions migrate on the interface isreduced. Improvement of the conductivity of the battery is facilitated, the influence of the modified layer on the charge-discharge performance of the battery is reduced, meanwhile, the influence ofa gel layer on the ionic conductivity is reduced, the time of balancing liquid absorption of the modified layer and of the separator is shortened and the whole conductivity of the battery is improvedto improve the performance of the separator and the battery.

The invention belongs to the technical field of performance testing method of civil engineering materials, and relates to a method for measuring chloride ion penetration resistance of concrete. An apparatus for measuring chloride ion penetration resistance of concrete is used for realization, and a concrete technological process comprises the following five steps: a concrete test piece is prepared, the concrete test piece is pretreated, the concrete test piece is clamped and mounted, the concrete test piece resistor is measured, and permeability of the concrete test piece is calculated and analyzed. Low voltage high-frequency AC electricity whose voltage is 1 volt and frequency is 1000 Hertz is used for measuring resistor of the concrete test piece which is pretreated by saturated water, resistance value reflects capability of chloride ion penetration resistance of the concrete test piece, so that the phenomenons that a polarization reaction is easy to happen in a DC test method and heat is generated in a solution under the effects of voltage for a long time are overcome, the disadvantage of generation of interference on resistance value is overcome, and ASTM C1202 which is recommended by American Society for Testing and Materials is improved; the method has the advantages of scientific and reliable principles, simple measuring flow, fast measuring speed, accurate measuring results, and easy promotion and usage.

The present invention provides low stress non-hermetic conformal coatings for the protection of microelectronic devices, such as a Microelectromechanical system (MEMS) based multichip module from adverse environments. The induced stress from these two coatings due to the thermal cycling and manufacture processing will not cause any influence on sensing accuracy of the piezopressure sensor or similar functional MEMS devices. Furthermore, the conformal coatings have the merits of low glass transition temperature, good elongation, low moisture uptake and mobile ion permeation, room temperature curability and good contamination resistance to the jet fume, which promise a high reliability for the aerospace and avionics application. One conformal coating comprises a composition/formulation containing a rubber, siloxane or urethane oligomer modified epoxy and an organic hardener, and optionally an organic diluent and a curing catalyst. Another conformal coating comprises a composition/formulation containing a silicone elastomer or gel and a metal chelate catalyst, and optionally a silica filler, a diluent and an adhesion promoter or coupling agent.

The invention discloses a manufacturing method and an application of silver ion graphene. The manufacturing method comprises the steps of adding graphene into a penetrating agent to be dispersed, wherein the penetrating agent is a non-ionic chelate; adding a silver ion compound solution to the mixture to be further dispersed to enable the silver ion compound solution to be uniformly dispersed on graphene and to enable graphene crystal lattices to be in full contact with silver ions; putting the mixture material in full contact with silver ions to a reaction kettle to be subjected to an ion permeation reaction; and drying the generated silver ion graphene solution into a finished product, measuring whether delivery parameters are reached or not, and packaging the qualified products.

The invention relates to a marine electric field measuring device which comprises a sealing body, a signal acquisition processing system in the sealing body, a plurality of pairs of electric field sensors, a signal amplification system, and a signal transmission system communicated with the signal acquisition processing system in the middle of the sealing body, wherein one end of each electric field sensor is fixedly connected with a housing of the sealing body in a sealing manner; the other end of each electric field sensor is communicated with a data acquisition system via the signal amplification system; cavities of the electric field sensors internally comprise electrolytes and electric field measuring electrodes immersed in the electrolytes; one end of each cavity is a sealing end; the other end of each cavity is an ion permeation end; and one end of each electric field measuring electrode is connected with a cable in a sealing manner. The measuring device has the main advantages that the measuring device is simple in structure, stable in electrode potential, short in equilibrium time and high in measuring accuracy; an influence of marine turbulence on the electric field measuring electrodes is small; the measuring device has an effect of preventing a marine organism from fouling; the sensors are convenient to calibrate and check; electrochemical activation can be performed; the service lives of the electrodes are long; and the measuring device is suitable for measuring marine, potamic and telluric weak electromagnetic fields.

A micro system power supply (1) comprises a compartment (7), at least one ion sink void (51, 52) being separated from the compartment (7) by ion pervious separation means (61, 62), a first electrode (41) being arranged in the ion sink void, and a second electrode (42). Such a micro system power supply (1) allows to provide power for a micro system, such as, e.g., an implantable micro device, a MEMS, a bioMEMS, or the like, wherein the micro system power supply (1) can be comparably efficiently manufactured in a manner to be comparably environmentally friendly disposable.