58results about How to "Control composition" patented technology

A process is provided to produce bulk quantities of nanowires in a variety of semiconductor materials. Thin films and droplets of low-melting metals such as gallium, indium, bismuth, and aluminum are used to dissolve and to produce nanowires. The dissolution of solutes can be achieved by using a solid source of solute and low-melting metal, or using a vapor phase source of solute and low-melting metal. The resulting nanowires range in size from 1 nanometer up to 1 micron in diameter and lengths ranging from 1 nanometer to several hundred nanometers or microns. This process does not require the use of metals such as gold and iron in the form of clusters whose size determines the resulting nanowire size. In addition, the process allows for a lower growth temperature, better control over size and size distribution, and better control over the composition and purity of the nanowire produced therefrom.

The invention relates to a preparation method of a ceramic membrane loaded zinc oxide photocatalyst, and belongs to the technical field of catalysis. A ceramic membrane acts as a carrier of the catalyst. The preparation method comprises the following steps: loading a layer of zinc oxide nano seed crystals on the surface of the ceramic membrane by adopting a dip-coating calcination method, and then preparing the ceramic membrane loaded zinc oxide photocatalyst by a hydrothermal method. The preparation method of the ceramic membrane loaded zinc oxide photocatalyst has the advantages that the photocatalyst is loaded to the surface of the ceramic membrane so as to prevent the problem of subsequent separation difficulty of the catalyst and a product. The catalyst is simple in preparation technology, is high in photocatalysis performance, and can be well applied to the catalytic degradation process.

The invention discloses a high-strength physical crosslinking hydrogel and elastomer composition and a preparation method thereof. The method comprises the following steps: uniformly mixing a physical crosslinking agent, water and water-soluble organic polymers to obtain a uniform solution, forming the hot solution, and then cooling to obtain a high-strength physical crosslinking hydrogel product; and removing water in the prepared hydrogen to obtain elastomer. The hydrogen and elastomer composition has excellent tensile strength, elongation at break and elastic modulus. By the preparation method of the high-strength physical crosslinking hydrogel and elastomer composition provided by the invention, crosslinking difficulty is reduced, the range of an application system is wide, controllability is high, and residues of organic monomers or initiators are avoided. The preparation method is simple, the cost is low, and the prepared hydrogel and elastomer composition is uniform, is good in transparency, has excellent mechanical properties, is pure, does not have impurities, does not have toxic or side effects, and has wide application prospects in the fields of the industry, biomedicine and the like.

The present invention belongs to the field of anticoagulant material technology. The anticoagulant surface modification process of artificial implant includes the following steps: cleaning artificial implant; preparing silicone rubber solution; coating the artificial implant with medical silicone rubber as support; coating perfluoro sulfonic acid on the surface of the silicone rubber coating; depositing polycation and polyanion alternately onto the surface of the perfluoro sulfonic acid coating via electrostatic attraction; and irradiating the artificial implant with ultraviolet light to produce photochemical reaction to convert the ionic bond between coating layers into covalent bond. The present invention has simple technological process, mild reaction condition, easy operation, high repeatability, environment friendship and thus excellent application foreground.

The invention provides an unsaturated fatty acid modified water-based acrylic resin dispersion body and a preparation method thereof. The unsaturated fatty acid modified water-based acrylic resin dispersion body comprises the following raw materials in parts by weight: 2-8 parts of unsaturated fatty acid, 2-8 parts of an acrylic epoxy monomer, 3-8 parts of an acrylic carboxyl monomer, 45-75 parts of a soft monomer and a hard monomer, 20-50 parts of a solvent, 0.3-3 parts of an initiator, 0.1-0.3 part of a catalyst, 0.05-0.15 part of a polymerization inhibitor, 0.1-0.2 part of a chain transfer agent, 2.5-5.5 parts of a neutralizer and 70-150 parts of deionized water. The preparation process is simple, the cost of the required raw materials is relatively low, and the prepared water-based acrylic resin dispersion body is relatively low in viscosity and uniform in particle size distribution which is smaller than 150 nm, can be applied to industrial anticorrosive coatings and has relatively good market application value.

The invention relates to a Tegafur/LDHs nanometer hybrid and a preparation method thereof, and aims to provide a method for preparing a Tegafur/LDHs nanometer hybrid for slow release of Tegafur to improve potency and reduce the toxic or side effect of medicaments by taking LDHs as a carrier. LDHs is taken as a main body, the Tegafur is taken as an intercalation object, and the Tegafur is assembled between LDHs layers by a coprecipitation method or a structure reconstruction method to prepare the Tegafur/LDHs nanometer hybrid. The Tegafur/LDHs nanometer hybrid and the preparation method have the advantages that: the nanometer hybrid prepared by the two methods is large in medicament-loading capacity and has good slow-release effect; the adopted preparation method is simple and the condition is moderate; the structure, compositions and the release rate of the Tegafur/LDHs can be controlled by adjusting a synthetic method or synthesis conditions or changing factors such as concentration, the pH, temperature, aging time and the like in the synthetic process of the medicaments.

The invention discloses a method for comprehensively improving quality of an eutrophic water body. The method includes the following steps of early-stage processing, dividing the water body, constructing an ecological floating bed, arranging an artificial attachment medium and planting vegetation. According to the method for comprehensively improving quality of the eutrophic water body, the water body dividing technology, the ecological floating bed technology, the artificial attachment medium and the vegetation planting and recovering technology are comprehensively used, the composition of phytoplankton structure in the water body can be changed, the percentage of diatom is increased, the percentage of blue-green algae is reduced, the possibility of cyanobacterial bloom is reduced, the eutrophication trend of the water body is correspondingly inhibited, the eutrophication degree of the water body is reduced, and water quality condition is improved. By adopting the method, the concentration of chlorophyll and chemical oxygen consumption in the water body can be reduced, the content of total nitrogen and total phosphorus is reduced, the content of suspended solids in the water body is reduced, the transparency of the water body is improved, the eutrophication trend is inhibited, and the quality of the eutrophication water body is effectively improved.

The invention discloses an inorganic/organic composite film photoelectrode in the semiconductor optoelectronic technical field, and a preparation method thereof. The invention successfully adopts the LbL self-assembly technology to obtain an inorganic/organic composite film with positively charged TiO2 nano-particles, and negatively charged TPPS dye molecules or PSS; the inorganic/organic composite film greatly increases the photocurrent and optoelectronic property stability; moreover, the TiO2/TPPS or PSS composite film can also generate obvious photocurrent within the 400-450nm wavelength range of a visible region, so as to greatly improve the application range of visible light. The invention has simple process and can effectively control the structure and composition of the film layer; in addition, the invention eventually realizes the control on the optoelectronic chemical properties of the semiconductor nano-materials and has great significance on the research of optoelectronic chemical properties of the semiconductor nano-materials and the application thereof; therefore, the invention can be effectively applied to the solar energy application, photovoltaic conversion and other fields.

The invention belongs to the technical field of preparation of inorganic nonmetal nanocomposite materials, and concretely relates to a preparation method of magnetic Fe2O3/Fe3O4 nano-heteroplasmon particles. The method adopts metal iron salt, alcohol and an alcohol-soluble organic matter as raw materials, and comprises the following steps: adding the iron salt to alcohol or the alcohol-soluble organic matter according to a ratio of the iron salt to the alcohol of 1mol/7mL or less, stirring for dissolving to prepare a sol solution, igniting and combusting the sol solution in air to prepare a gel, calcining the gel at 150-450DEG C under a heating rate of 0.5-15DEG C/min for 0.1-12h, and naturally cooling to prepare the magnetic Fe2O3/Fe3O4 nano-heteroplasmon particles. The preparation method has the advantages of simple technology, convenient operation, easy process control, wide sources of the raw materials, low cost, environmental protection, low requirements on a required device, uniform diameter distribution of the particles, and convenience for large-scale industrial production. The microstructure and the morphology of the particles can be conveniently controlled by adjusting process factors and the chemical composition in order to control the performances of the particles.

The invention provides an elastic self slope type floating ice protection device. The purpose of the elastic self slope type floating ice protection device is to reduce ice-induced vibration of a protection structure effectively, at the same time, control inclination angles of action surfaces, achieve bending failures of ice sheets, and achieve protection effects of icing disasters at different water levels. The elastic self slope type floating ice protection device is composed of a faceplate, a base plate, a beam, an upper cross bar, a lower cross bar, an upper cross bar spring, a lower cross bar spring, connecting nuts, hollow bolts, limiting nuts, faceplate slide grooves, hinged joints and trusses. According to the elastic self slope type floating ice protection device, the faceplate and the beam form a slope type protection structure capable of changing angles, and the faceplate, the springs, the upper/lower cross bar and the hollow bolts form an energy dissipation system. The purpose of adapting to changes of water levels of protection water areas and controlling the inclination angle of the faceplate through selections of design parameters can be achieved. By combining common characteristics of an elastic energy dissipation device and an inclined-plane floating ice protection device, the elastic self slope type floating ice protection device is suitable for structures of large-scale cofferdams, construction work platforms, bridge foundations and the like.

A process for preparing lactic acid-rubber copolymer includes such steps as dewatering lactic acid, polycondensating, modifying its terminal radical to obtain hydroxy terminated polylactic acid, copolymerizing reaction on the isocyanate terminated rubber, and extending chain. Its advantage is easy control to the mechanical performance and biodegradation of product.

The invention discloses a dechroming carbon-maintaining method for smelting Cr-containing molten iron through a top-bottom combined blowing converter. The dechroming carbon-maintaining method comprises the following steps: filling Cr-containing molten iron and waste steel into the top-bottom combined blowing converter, adding a slagging material, blowing oxygen gas by a top gun from smelting startto smelting end, blowing inert gases by a bottom gun, and smelting, wherein Cr element content of Cr-containing molten iron is as follows: less than or equal to 0.25wt% of Cr; Cr element content in waste steel is as follows: less than or equal to 0.08wt% of Cr; and adding amount of Cr-containing molten iron accounts for 78.0wt%-82.96wt% of total mass of the Cr-containing molten iron and the wastesteel. The dechroming carbon-maintaining method has the beneficial effect of breaking through the technical bottleneck that Cr-containing molten iron cannot meet requirements of controlling residualCr to be less than or equal to 0.08% in aspect of a converter smelting process, realizes smelting of the Cr-containing molten iron and waste steel through the top-bottom combined blowing converter, and achieves the target that the final-point Cr is less than or equal to 0.08%.

The present invention uses long-chain mercaptan and aniline which are easily adsorbed on gold surface as raw material, and adopts the following steps: firstly, making silicon wafer sample undergo the process of surface treatment, using photo-etching technique to form regular pattern on the silicon surface, using said template as mold, pouring Sylgard 184 on its patterned surface, solidifying and forming at proper temperature to form elastic stamp with relief structure; then utilizing vacuum thermal deposition process to obtain a gold layer with a certain thickness on the silicon wafer or general microslide, and utilizing microcontact printing method to form a patterned octodecamercaptan self-assembled film on the gold surface; finally, using electrochemical polymerization method to prepare patterned polyaniline film.

The invention discloses a method for highly selectively preparing paraxylene and isooctane from diisobutene. The method comprises the following steps: a catalytic reaction apparatus is filled with an aromatization-hydrogenation difunctional catalyst, a diisobutene material enters reactor to catalyze a bed reaction, and the obtained products are separated by a separation device to obtain isooctane and paraxylene. The reinforcement of a hydrogenation reaction makes a hydrogenation process and an aromatization process simultaneously carried out in the same reactor, so the technology is simplified, and paraxylene and isooctane are produced in a combined manner; and a paraxylene and isooctane product with different proportions can be obtained through control of the catalyst composition, the reaction temperature and a material cycle ratio, and the paraxylene and isooctane product can improve the economic benefit as a basic organic chemical product and a fuel additive.

The invention relates to a norcantharidin/layered double hydroxide (LDHs) nano hybrid and preparation method thereof. An LDHs is provided and serves as a carrier, the norcantharidin/LDHs nano hybrid is prepared, and the controlled release of the norcantharidin is achieved, so that the medical effect is improved, and the toxic and side effect of medicines is reduced. The method comprises that the LDHs serves as a main body, the norcantharidin is an intercalated object, the norcantharidin is assembled among LDHs layers through a coprecipitation method, and the norcantharidin/LDHs nano hybrid is prepared. The method has the advantages that the hybrid has a good slow-release effect for the norcantharidin; the process is simple and reaction is mild; and the synthesis conditions of the norcantharidin/LDHs nano hybrid are regulated, for instance, the concentration, the synthesis temperature, the ageing time and the like of medicines are changed, so that control of the structure, components and the release rate of the norcantharidin/LDHs nano hybrid can be achieved.

The invention relates to the field of ionic liquid electro-deposition technologies, in particular to a method of template-free electro-deposition SmCo nanowires. The method comprises the following steps: preparing new ionic liquid SmCl3-CoCl2-EMIC at first; and carrying out potentiostatic deposition on the new ionic liquid to obtain the SmCOnanowires with the diameters being about 50 nm. Through change of electrochemical parameters, the SmCo alloy nanowires with different lengths and alloying components can be prepared in a controllable manner, and meanwhile, a hysteresis curve shows that the nanowires have obvious magnetic anisotropy. By the method, template manufacturing and dissolving processes are omitted. The method has the advantages of low cost, low consumption, simple technology and the like.

The invention discloses a microwave chained turn-around machine, which comprises a machine body, a rack, a drive device and a scraper chain. The machine body is mainly formed by sequentially connecting a tail part, a feeding inhibition section, a pyrolysis cavity, a discharging inhibition section, a head part and a return stroke section and forms a turn-around type sealed box body, wherein the tail part and the head part are located on two ends of the machine body; the return stroke section is located above the feeding inhibition section, the pyrolysis cavity and the discharging inhibition section; the rack is located on the lower end of the machine body and is used for supporting the machine body. a stopping seat is additionally arranged at a feed inlet part, so that materials are prevented from splashing when being fed; a lifting plate is additionally arranged at a feeding inhibition section inlet, so that the thickness of the materials paved on a transmission china plate is adjusted, biomass particle materials can be uniformly heat, and the production of impurities is reduced. Meanwhile, the composition of a pyrolysis product can be controlled according to the adjustment of the movement speed of the scraper chain.