420results about How to "Easy to get" patented technology

Preparation method for graphene reinforced polymer porous sponge fiber

InactiveCN103603081AExtensive sources of raw materialsEasy to getArtificial filaments from viscoseAlginate artificial filamentsSolventCvd graphene
The invention provides a preparation method for graphene reinforced polymer porous sponge fiber. The preparation method is characterized in that: the graphene reinforced polymer porous sponge fiber is prepared by subjecting an oxidized graphene solution having a certain concentration to ultrasonic processing to obtain a uniformly dispersed oxidized graphene solution; dissolving a polymer in a solvent to obtain a polymer solution with a certain concentration; adding the dispersed graphene solution into the polymer solution under stirring to obtain a graphene-polymer blend spinning solution; spraying the graphene-polymer blend spinning solution through a spinning nozzle into a coagulating bath to form fiber by utilization of a wet-method spinning device; washing with water, reducing, and washing with water again; and quickly subjecting the wet fiber to freeze drying or supercritical drying to obtain the graphene reinforced polymer porous sponge fiber. The preparation method is simple in technology and low in cost, and is suitable for large-scale production. The fiber has advantages of high strength, good antistatic performance, good elasticity, small density, large specific surface area, and the like. The fiber can be used for preparing heat insulating fabrics in the weaving field, and can be used for water treatment in the environment protection field, and the like.

High purity manganese sulfate monohydrate and preparation method thereof

ActiveCN101875507AReduce contentEasy to getManganese sulfatesManganese sulphate monohydrateHeavy metals
The invention relates to manganese sulfate and a preparation method thereof, in particular to high purity manganese sulfate monohydrate and a preparation method thereof. In the high purity manganese sulfate monohydrate, the content of manganese is more than 32%; the content of impurities of K, Na, Ca and Mg are lower than 50ppm; and contents of heavy metal and iron impurity are both lower than 10ppm. The preparation method comprises the steps of: firstly adjusting the pH value of solution to 3.5 to 5 for remove impurities for the first time by using iron sulfate as an impurity removing agent; then adjusting the pH value to 4 to 7 using manganese carbonate; adding an adsorbent to remove the impurities for the second time; removing the impurities for the third time by using manganese fluoride as an impurity removing agent under the condition that the pH value is 4 to 7; then removing the impurities for the fourth time by using barium sulfide as an impurity removing agent under the condition that the pH value is 4 to 7; and finally concentrating, crystallizing, washing and drying to obtain the high purity manganese sulfate monohydrate. In the manganese sulfate monohydrate of the invention, the contents of all main metal impurities are lower; the content of the manganese is high; and the requirement of the anode material of a lithium-ion battery can be satisfied.

Shared terminal identification system using a network packet and processing method thereof

The present invention relates to a system and method for authenticating, monitoring, and managing all terminals connected to a wireless/wired network to use Internet. A shared terminal management system comprises a management server, a charging server, a central server, a central authentication G/W server, and a proxy server, and assigns a terminal identification value for every terminal that uses Internet, authenticates terminals by reading and analyzing the assigned terminal identification value, monitors and manages shared terminals used as being connected to one line to classify lines into a basic line and an additional line, and charges for the additional line. The shared terminal identification system for identifying and managing terminals connected to one Internet line comprises a subscriber line authentication unit, a packet collecting unit, a first packet analyzing unit, an element packet transmission unit, a data management unit and a terminal determining unit. The shared terminal processing method for managing the shared terminals comprises the following steps: detecting users of a sharing device; selecting target users for sharing devices; transmitting a notification; applying for an additional terminal service subscription; and ceasing the connection to the Internet.

Synthesis method for elemental mercury sorbent

The invention discloses a synthesis method for an elemental mercury sorbent, comprising the steps that: a solvent and a modifying agent are added into a reactor, 20-50 meshes of attapulgite powder isadded subsequent to the dissolution of agents, 0.04-0.1 kg. of attapulgite are added into the solvent per liter, the mass ratio of the added modifying agent to the attapulgite is 1:3-1:50, and filtration and drying are implemented after uniform mixing, wherein, the solvent is deionized water, acetone, methanol or ethanol; the modifying agent is any one of the group consisting of copper chloride, sodium chlorate, potassium bromide, potassium iodide, calcium thioglycolate, cysteine, glutathione, dimercaptopyridine and 3-mercaptopropyltrimethoxysilane. The sorbent synthesized according to the method is natural mine, which is low in price, easy in acquirement and free from generating secondary pollution to environment and causing no influence on economical efficiency of fly ash in power plant;the used modifying agent is nontoxic and harmless, the synthesis for the sorbent is simple and easily operated, and the sorbent is obvious in removing elemental mercury and can reduce the concentration of the elemental mercury in smoke from coal-fired power plant by over 90% to be thereby harmless to environment during the production.

Ground radiation source single-satellite positioning method based on signal intensity multi-beam spatial distribution

The invention discloses a ground radiation source single-satellite positioning method based on signal intensity multi-beam spatial distribution. The method includes following steps: (10) building an antenna directional diagram directional model according to an antenna directional diagram function and the connection between the antenna gain and the pitch angle and the azimuth; (20) determining a main reception beam and space-division co-frequency multiplexing beams thereof according to ground radiation signal characteristic parameters and intensity received by a satellite, and obtaining spatial distribution of the radiation signal intensity in a multi-beam environment according to the reception of a plurality of space-division co-frequency multiplexing beams with the highest radiation signal intensity; (30) establishing a directional equation set according to the antenna directional diagram directional model and the spatial distribution of the radiation signal intensity, solving the directional equation set, and obtaining radiation source position direction; and (40) obtaining the latitude and longitude of the ground radiation source with the combination of geographical information and ephemeris information according to the radiation source position direction. According to the single-satellite positioning method, the emission cost is low, the consumption of satellite resources is low, and the positioning precision is high.

Simulation generation method for parallel interleaver

The invention discloses a simulation generation method for a parallel interleaver, and belongs to the technical field of mobile wireless data transmission. The method is characterized by comprising the following steps: dividing an RAM into M independent access blocks, and setting the number of storage units of each block as W so as to acquire a block address (block number and in-block address) of each storage unit; equally dividing sequences to be interleaved into M sections in order, and setting the number of symbols of each section as W so as to acquire a section address (section number and in-section address) of each symbol; using the generated different random sequences as rows of interleaving patterns, and mapping the section number of each section address to the block number of the block address; on the basics, generating a basic interleaving vector according to the length of the memory, acquiring rows of interleaving patterns of different interleavers through cyclic shift for the basic interleaving vector, and mapping the in-section address of each section address to the in-block address of the corresponding block; and writing the symbols of the section address into the storage units of the corresponding block address, and synchronously reading the symbols out in address order. The method saves the storage resource and effectively reduces the time delay.

Preparation method of exfoliated montmorillonite-epoxy resin composite

The invention relates to a preparation method of an exfoliated montmorillonite-epoxy resin composite. The preparation method is characterized by comprising the following process steps: (1) performing organic modification on montmorillonite: preparing intercalating agent saline solution; adding montmorillonite suspension in the intercalating agent saline solution to ensure that the intercalating agent completely exchanges with positive ions in montmorillonite; performing centrifugal filtration on the obtained suspension, repeatedly washing the obtained solid, which is obtained through filtration, with deionized water, detecting the used deionized water with silver nitrate solution until no white precipitate is generated; performing vacuum drying on the solid obtained by centrifugal filtration; crushing and grinding the obtained solid to ensure that the solid can pass through a 200-mesh sieve, thus obtaining organically modified montmorillonite; (2) mixing the organically modified montmorillonite, epoxy resin and curing agent to obtain a mixed system; and (3) defoaming and curing. By using the intercalating agent in the method provided by the invention, the interlaminar curing reaction can be performed before the external curing reaction, and the exfoliated montmorillonite-epoxy resin composite can be obtained more easily.
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