71results about How to "Oxidation does not occur" patented technology

The invention relates to a fiber, and in particular relates to a bamboo leaf flavonoid mint core-sheath compound fiber. The bamboo leaf flavonoid mint core-sheath compound fiber is prepared by the following steps: treating tourmaline; treating a core layer material to form a non-woven needle-punched hemp palm fiber aerogel core layer material; treating a sheath layer material, namely, preparing first slurry from 0.1-0.3 part by weight of treated tourmaline, 0.6-0.8 part by weight ethylene glycol, 0.01-0.04 part by weight of bamboo leaf flavonoid and 0.02-0.05 part by weight of beta-cyclodextrin mint oil micro-powder, wherein the preparation method of the beta-cyclodextrin mint oil micro-powder comprises the step of mixing beta-cyclodextrin and mint oil according to the mass ratio of (8-15) to (40-65) at the temperature of 20-30 DEG C to form the beta-cyclodextrin mint oil micro-powder with morphology of a clathrate compound; carrying out an esterification reaction on phthalic acid and glycerol; after the reaction, feeding the first slurry, magnesium oxide and calcium hydroxide, and carrying out a polycondensation reaction; casting a belt and carrying out grain-sized dicing to obtain a polyester chip sheath layer material; carrying out composite melt spinning to prepare the bamboo leaf flavonoid mint core-sheath compound fiber. The bamboo leaf flavonoid mint core-sheath compound fiber has the functions of antibiosis and health protection, and is comfortable and environment-friendly.

The invention discloses a method for promoting phase change strengthening and toughening of a two-phase titanium alloy strip by using pulse current. The method comprises the following steps: tensioning a TC4 titanium alloy strip through a decoiling device, a winding device, a roller and a support roller of a rolling mill, so that the strip is in tightly elastic contact with the roller; driving the strip to transmit at the speed of 150-800mm / min through friction force by virtue of the roller; inputting the pulse current into a power-up area section of the strip through the roller, the support roller and the like, wherein the pulse current generates a joule heating effect and a non-thermal effect in the power-up area section of the strip within 12-18 seconds, so that the internal microstructure of the strip turns into a two-phase long-axis structure or a two-phase dual-state structure from an original quasi-single phase thick equiaxed structure; and then cooling by natural air at room temperature. Through adjustment of parameters of the pulse current, the TC4 strip with the two-phase long-axis structure and the two-phase dual-state structure can be quickly obtained, thus the ductility is increased; the treatment temperature is far lower than 960 DEG C of a traditional thermal treatment process; the processing process of the titanium alloy strip can be finished without a short period of time at relatively low temperature without an oxidation phenomenon; and therefore, the method is energy-saving, environmentally friendly, safe and efficient.

The invention relates to an extraction technology of a perilla frutescens essential oil. The technology comprises: cleaning, wall breaking, freezing drying, crushing and screening, as well as cycling extraction. The invention adopts ultrasonic wall breaking so as to make the subsequent extraction faster and reduces production cost. Employment of a freezing sublimation drying technology can reserve all the components in plants to the utmost, and the vacuum state avoids the influence of oxidation on drug effect. Meanwhile, essential oil yield is obviously improved. Carbon dioxide is an optimal extracting agent for pure natural substance extraction. As carbon dioxide has low viscosity and high diffusion coefficient, so that the extraction efficiency and the product yield can be high. Carbon dioxide is easily available and inexpensive, and is recyclable during extraction, thus reducing cost. As carbon dioxide is incombustible and non combustion-supporting, production sites have no danger. The invention makes use of the supercritical temperature of carbon dioxide for low temperature extraction so as to exempt biologically active substances from thermal degradation and other undesired auxiliary reactions.

The present invention discloses a high-nutrient cactus juice and its extraction method capable of no breaking nutrient component of cactus, and it is characterized by that said cactus juice is extracted from Mexican mibangta edible cactus. Said extraction method includes the following steps: picking cactus leaf, cleaning, using presser to press juice, adding pectinase in juice, stirring, filtering, drying filtrate at 20-25 deg.C by airing, concentrating and packaging so as to obtain the invented product. Said cactus juice has rich nutrients, and has high medicinal and health-care value.

This invention provides a complex type crucible used in magnesium and magnesium alloy smelting. In order to conquer the problem of crucible easy corrosion and penetration, oxidizing desquamation, low quality and short life in high temperature, the crucible in this invention is compounded by ceramic material and double metal crucible made by heat-resisting steel or nickel base high-temperature alloy and carbon steel. The inner layer is the ceramic material that does not react with magnesium and magnesium alloy, central layer is carbon steel material, outer layer is heat-resisting steel or nickel base high-temperature alloy material. The connecting of double metal material is explosive bonding and the high temperature strength and creep resistant capability of crucible is increased, ceramic material form ceramic inner coating on carbon steel surface by spray coating or laser melting and coating technique. The outer layer make crucible not oxidation desquamation in high temperature, carbon steel avoids the high temperature oxidation, ceramic layer prevent crucible corroded by high temperature metal liquor and corrosion gas, the second pollution in smelting process is avoided. It can be used crude magnesium smelting purifying, and smelting preparing, melting and casting of magnesium alloy.

The invention provides a solar cell, which comprises a silicon substrate sheet, a conductive layer covering the front surface of the silicon substrate sheet, a copper front electrode arranged on the surface of the conductive layer, a back surface field arranged on the back face of the silicon substrate sheet, and a back electrode conducted with the back surface field, wherein the conductive layer is an aluminum-doped zinc oxide layer, a tin-doped indium oxide layer, an antimony-doped tin oxide layer or a tin dioxide layer. The invention also provides a solar cell preparation method and a solar cell module comprising the solar cell. The copper back electrode and the copper front electrode obtained by using the technology of the invention have good appearances, strength of welding between the electrodes and a photovoltaic welding strip and electric performance of the cell remain almost the same as those of a battery with silver electrodes prepared by the traditional technology, and in addition, as copper paste is adopted to replace the traditional silver paste, the cost of the cell is greatly reduced.

The invention discloses a lily tea wine and a preparation method thereof. The lily tea wine is prepared from 14 to 16 parts by weight of lily powder and 9 to 11 parts by weight of tea leaves; the lily tea wine is prepared through tea soup preparation, lily juice preparation, yeast activation, fermentation liquid preparation, inoculation and fermentation. The lily tea wine is prepared through fermentation, while the existing lily tea wine is mixed wine. Compared with the mixed wine and solid fermentation wine, the lily tea wine in the experiment uses lily starch as a raw material, and is prepared by a liquid state fermentation method after the hydrolysis on the starch, so that the nutrition is rich; the characteristics and the nutrition ingredients of the natural substances are remained; through microorganism metabolites, the absorption by a human body is easier; the lily tea wine has incomparable advantage over other wines; meanwhile, the color and luster are pleasing to the eyes; the sugar-acid ratio is proper; the alcohol content is low (10 percent, v / v); the health care function is realized.

The invention discloses a seamless welding process of a copper tube, which aims at solving the problem of low brazing yield of the copper tube; the key points of the technical scheme are (1) pre-welding treatment; (2) inspection; (3) cutting; (4) installation of socket-and-spigot joint; (5) brazing clearance; (6) axial deviation of the copper tube; (7) selection of a welding torch and a welding nozzle; (8) selection of combustible gas; (9) flame regulation; (10) preheating and heating; (11) brazing connection; (12) heating and maintaining; (13) cooling operation; (14) post-welding treatment. The seamless welding process of the copper tube provided by the invention can improve the finished product rate of seamless welding, so that the copper tube has long service life and high stability after brazing.

The invention discloses a levodopa refining method. The levodopa refining method comprises the following steps of (1) leaching liquor preparation, (2) dissolution, (3) impurity removal, (4) phenol removal and (5) recrystallization to obtain refined levodopa. According to the levodopa refining method, a prepared leaching liquor can fully dissolve levodopa and impurities; separating the levodopa through crystallization can help remove most of the impurities to ensure the quality of levodopa finished products and meanwhile to provide a good environment for subsequent tyrosine removal, thereby ensuring that tyrosine can be thoroughly removed. The prepared refined levodopa achieves a purity degree not lower than 99%, and when detected through a USP (United States Pharmacopeia) 38 method, has acontent of tyrosine not higher than 0.1%.

The invention discloses an online surface cleaning and protection liquid coating process of aluminum alloy high frequency welding pipes and for a heat exchanger and belongs to the field of aluminum alloy high frequency welding pipe processing. The new process is high in production efficiency, clean in welding pipe surface and stable in storage. The technical main point includes extruding and welding aluminum alloy belt materials into aluminum alloy round pipes, cooling the aluminum alloy round pipes, removing scars on the aluminum alloy round pipes, delivering the aluminum alloy round pipes into a flat pipe molding machine to form aluminum alloy flat pipes in molding mode, enabling the aluminum alloy flat pipes to pass through a box body provided with a rotating hair brush and protection liquid, utilizing the rotating hair brush to clean the outer surface of the aluminum alloy flat pipes, coating protection liquid on the pipes and conducting follow-up work procedures to obtain finished products. The online surface cleaning and protection liquid coating process is used for processing of the aluminum alloy high frequency welding pipes.

The invention discloses a self-sealing type bottle cap for an oil bottle. The seal-sealing type bottle cap for the oil bottle consists of a sealing cap, a one-way valve and a bottle cap body, wherein the sealing cap consists of a cap opening and a cap body; the cap body is in threaded connection with the bottle opening of the oil bottle; a sealing surface is arranged on the inner side of the cap opening; the one-way valve is arranged on the sealing cap and consists of a valve seat, a valve rod, a spring blocking cushion and a spring; one end of the valve rod is integrally connected with the valve seat; the other end of the valve rod is provided with the spring blocking cushion; the spring is arranged on the valve rod and is positioned by the spring blocking cushion; the valve seat is positioned at the cap opening of the sealing cap and is in plane contact with the sealing surface of the cap opening; and the bottle cap body is in threaded connection to the cap opening of the sealing cap. The self-sealing type bottle cap for the oil bottle has the advantages that oil in the oil bottle can flow out through the one-way valve, but air cannot enter the oil bottle from the bottle opening, so that edible oil in the bottle is isolated from the air, oxidation of the edible oil is stopped, the expiration date of the edible oil is prolonged, and the edible oil is safe to eat.

The invention discloses a laser welding device. The laser welding device comprises a pedestal, a sliding seat, a first moving driving mechanism, a second moving driving mechanism, a holding and locking mechanism, a laser welding head and an inert gas nozzle. The sliding seat is slidably arranged on the pedestal in the front-back direction, and the first moving driving mechanism is arranged on the pedestal and is connected to the sliding seat in a transmission mode so as to drive the sliding seat to slide in the front-back direction. The holding and locking mechanism is slidably arranged on the sliding seat in the left-right direction, and the second moving driving mechanism is arranged on the sliding seat and is connected to the holding and locking mechanism in a transmission mode so as to drive the holding and locking mechanism to slide in the left-right direction. The laser welding head is clamped and fixed to the holding and locking mechanism in a vertical-position-adjustable mode, and the inert gas nozzle is fixed to the holding and locking mechanism. An outlet of the inert gas nozzle is aligned at the welding position of the laser welding head. The laser welding device is small and exquisite in structure and is arranged on a winding machine to replace a traditional device for thorn and rivet welding, cooling welding and ultrasonic welding.

The invention provides a preparation method of a light-weight intermetallic compound based layered composite material. The preparation method comprises the following steps: with Ti foil and Al foil as raw materials, alternately stacking the pretreated Ti foil and Al foil, keeping the Ti foil at the outmost layer, and carrying out vacuum hot pressing treatment under the conditions that the base pressure is 6.67*10<-3>Pa, the reaction temperature is 640-685 DEG C, the heating rate is 1-10 DEG C / min, the applied pressure is 0-4MPa, and the temperature preservation time is 1-10h. According to the preparation method, the mutually stacked Ti foil and Al foil are subjected to diffusion reaction by using a vacuum hot pressing method to generate an intermetallic compound Al3Ti, and the intermetallic compound Al3Ti and the residual Ti layer are formed into a layered composite material with a Ti layer as a reinforcement body. The intermetallic compound Al3Ti has high strength and hardness, low density and higher fragility, while the Ti layer is the reinforcement body with better toughness, so that the obtained intermetallic compound based layered composite material has high toughness on the basis of high strength.