150results about How to "High cost of preparation" patented technology

The invention relates to a preparation method for core-shell fluorinated polyurethane-acrylate latex. The method comprises the following steps: placing polyether glycol and toluene diisocynate into a stirrer to prepare polyurethane; and emulsifying an emulsifier, butyl acrylate, methyl methacrylate, a functional monomer and a proper amount of water at high speed to prepare the core-shell fluorinated polyurethane-acrylate latex. By the method, the defects that the fluorinated acrylate in the prior art is independent of oil and water phases due to hydrophobicity and lipophobicity, effective micelle is difficult to form by the general surfactant and the grafting ratio is low are overcome. The core-shell fluorinated polyurethane-acrylate latex has a core-shell structure and the fluorinated acrylate is enriched in the shell, so a latex film has a large water contact angle. The using amount of the fluorinated acrylate monomer (G04) is 1 to 2 percent of the weight of the monomer and the using amount of polyurethane (PU) is 10 percent of the weight of a composite latex solid, so the preparation cost is low. The emulsifier does not need a fluorine-containing surfactant, so the polymerization rate is high, the grafting efficiency of the fluorinated acrylate monomer is high and the latex is stored stably.

The invention relates to a preparation method of porous perfluorinated sulfonic acid resin for catalysts, wherein the preparation method comprises that perfluoro(sulfonyl vinyl)ether and tetrafluoroethylene are polymerized under the condition of co-existence of a solvent, a pore-forming agent and an initiating agent to obtain the product, the perfluorinated sulfonic acid resin having low equivalent weight and low molecular weight is used as the pore-forming agent, the solvent is recycled by a way of adding deionized water and a dispersant and carrying out distillation, at the same time, the resin is molded, after further drying, a granular material is obtained, and moreover, a mixture of one or more of perfluorinated hydrocarbon / perfluorinated cyclic ether / chlorofluorocarbon are used as an extraction agent for extracting the pore-forming agent so as to form a porous structure. The method has simple operating conditions, has no need for high temperature and high pressure, and solves the problem in the prior art that effective catalytic component loss is difficult to overcome during a using process, and the service life of the catalyst is increased; and at the same time, due to the existence of the porous structure, the specific surface area is increased, and the active component utilization rate is improved.

The invention relates to a thin film crystalline silicon perovskite heterojunction solar battery and a preparation method thereof, and relates to a semiconductor device for converting luminous energy into electric energy. The thin film crystalline silicon perovskite heterojunction solar battery includes a transparent conductive substrate, a P-type thin film crystalline silicon hole transport layer, a perovskite light absorption layer, an electron transport layer formed by compact titanium dioxide, and a back electrode, wherein the perovskite light absorption layer and the P-type thin film crystalline silicon hole transport layer have matched energy levels. The configuration pattern: the P-type thin film crystalline silicon hole transport layer is arranged on the transparent conductive substrate; the perovskite light absorption layer is arranged on the P-type thin film crystalline silicon hole transport layer; the perovskite light absorption layer and the P-type thin film crystalline silicon hole transport layer form a thin film crystalline silicon perovskite heterojunction; the electron transport layer formed by the compact titanium dioxide is arranged on the perovskite light absorption layer; the back electrode is arranged on the electron transport layer formed by the compact titanium dioxide. According to the invention, the defects that the existing perovskite solar battery is low in stability and high in preparation cost, and a mass of silicon materials are used can be overcame.

The present invention relates to a high ultraviolet transmitting double wire grid polarizer for fabricating a photo-alignment layer and a fabrication method thereof for improving the fabrication efficiency of the photo-alignment layer. More specifically, the invention provides a high ultraviolet transmitting double wire grid polarizer comprising: a substrate; a reflection preventing layer which is formed on the substrate; a patterned photosensitive material layer which is formed on the reflection preventing layer; and double metal thin film layers which are respectively formed on the photosensitive material layer and the reflection preventing layer. Further, the invention provides a fabrication method of a high ultraviolet transmitting double wire grid polarizer, the method comprises the steps of: forming a reflection preventing layer on a substrate; forming a photo sensitive material layer by applying photoresist to the top of the reflection preventing layer; forming a wire grid pattern by developing the photosensitive material layer after selectively exposing the photosensitive material layer according to a pattern that is formed by the laser interference light; and depositing metal on the wire grid pattern. Thus, the invention smoothly forms a wire grid by using the reflection preventing layer when the double wire grid polarizer is fabricated, and cuts down the production cost with no need to perform a dry etching process since the metal is deposited after the wire grid of the photosensitive material layer is formed. Further, compared with the existing single wire grid polarizer, the invention improves transmittance and polarization of the ultraviolet region, thereby enhancing the efficiency of the fabrication process of the photo-alignment layer.

The invention discloses a baked charcoal, and a preparation method and an application thereof. The method comprises the following steps: washing, drying, crushing and drying agricultural and forestrywastes with a hemicellulose content of above 40%, used as a raw material, carbonizing the raw material in an oxygen-limited environment, and washing and drying the carbonized raw material to obtain the baked charcoal. The baked charcoal is prepared from the agricultural and forestry wastes by a limiting oxygen technology, so the preparation method has the advantages of simplicity, low cost and high charcoal yield; and the obtained baked charcoal has a hydrophobic surface, is rich in surface functional groups, can efficiently adsorb and separate metal ions in wastewater, and provides a cheap and efficient adsorbent for the recycling of industrial wastewater.

The invention relates to a graphene and carbon nano tube enhanced aluminum matrix composite and a preparation method thereof, and belongs to the technical field of aluminum matrix composites. In orderto solve the problems that graphene and carbon nano tubes are clustered and form carbide with an aluminum matrix at a high temperature and in order to improve the wear resistance of the aluminum matrix composite, the graphene and carbon nano tube enhanced aluminum matrix composite is provided, and components of the graphene and carbon nano tube enhanced aluminum matrix composite comprise, by masspercent, 0.1%-5.0% of composite copper plated nickel graphene, 0.1%-5.0% of composite copper plated nickel carbon nano tubes, 5% of magnesium powder and the balance aluminum powder. Copper plated nickel is compounded on the surfaces of the graphene and the carbon nano tubes to strictly control the interface reaction, ultrasonic dispersion is carried out in a stirring state so that the graphene and the carbon nano tubes can be evenly dispersed in the aluminum matrix composite, finally the enhanced aluminum matrix composite is obtained through vacuum hot-pressing sintering, and the wear resistance of the aluminum matrix composite is obviously improved due to the self-lubricating characteristic of the graphene and the carbon nano tubes.

The present invention relates to a cracking catalyst containing laminar clay. It is prepared by adopting the following steps: mixing the expandable clay modifying component, pseudo-thin hydrargillite and water, pulping for 0.1-10 hr. to obtaining a slurry liquor, ageing slurry liquor for 0.1-10 hr. at 50-85 deg.C, drying, forming, washing with water, ageing, finally drying and roasting so as to obtain said catalyst. The described modifying component can be selected from one or several kinds of hydroxyl polymers of silicon, aluminium, zirconium or titanium or one or several kinds of one or several substances containing the described hydroxyl polymer. Said catalyst has higher heavy oil conversion capacity.