59results about How to "Not easy to prepare" patented technology

The invention provides a preparation method for a nano particle and stable blue phase liquid crystal compound material. According to the method, inorganic nano particles which have different particle diameters, and are subjected to surface modification, and of which the dipole moment is 50 to 150d, such as ZnS particles, ZnO particles, GdS particles, GdSe particles and the like are added into a blue phase liquid crystal with a wide temperature range in a certain proportion, so that the blue phase liquid crystal can be restored reversibly under the action of highfield, and meanwhile, the temperature range of the blue phase can be widened to certain extent. The nano particle and stable blue phase liquid crystal compound material is easy to prepare, and has an obvious effect, and the prepared system is high in stability and low in viscosity, and can quickly respond to an electric field.

The invention relates to the technical field of graphene, in particular to a preparation method of graphene for a heater. The method is characterized in that the graphene is prepared by adopting an oxidation-reduction method and specifically comprises the following steps: firstly, peroxidation of the graphene; secondly, oxidization of graphite, wherein oxidation treatment comprises four stages, namely low-temperature reaction, medium-temperature reaction, high-temperature reaction and after treatment; in the low-temperature reaction and the medium-temperature reaction, an ultrasonic and mechanical stirring combined action is adopted, and hydrogen is introduced into a reaction system; thirdly, preparation of the graphene, wherein a drying mode in the preparation process adopts freeze drying. According to the preparation method of the graphene for the heater, provided by the invention, a production process is controllable, and large-scale production can be realized; nano ions are not easy to agglomerate in the preparation process; a prepared graphene crystal is complete in structure and excellent in conductivity.

The invention discloses a reduced graphene oxide-polyurethane dual-sponge adsorption film, a preparation method therefor and an application of the reduced graphene oxide-polyurethane dual-sponge adsorption film. The reduced graphene oxide-polyurethane dual-sponge adsorption film comprises reduced graphene oxide sponge and a polyurethane hot-pressed sponge film, wherein the reduced graphene oxide sponge is uniformly filled in pores of the polyurethane hot-pressed sponge film and is physically bonded with the polyurethane hot-pressed sponge film. The preparation method comprises the following steps: (1) preparing a graphene oxide-polyurethane sponge dispersion solution; (2) carrying out freeze drying; and (3) carrying out hot-pressing film forming. The reduced graphene oxide-polyurethane dual-sponge adsorption film has the advantages that the adsorption performance is good, the efficiency of removing contaminants from water is high, large-size preparation can be achieved, the adsorption film is easy to recover and can be repeatedly used, and the like; and the preparation method is simple in process and low in cost and advantageously achieves industrial production.

The invention relates to a preparation method of 2, 4, 6-trimethylbenzoyldiphenylphosphine oxide and particularly relates to a method, which comprises that phosphorus trichloride, benzene and aluminumtrichloride as raw materials undergo a reaction, the reaction product undergoes a hydrolysis reaction to produce diphenylphosphine oxide, diphenylphosphine oxide and 2, 4, 6-trimethylbenzoyl chloridedirectly undergo a reaction to produce 2, 4, 6-trimethylbenzoyldiphenylphosphine oxide. The preparation method of TPO solves the problems that the raw materials are difficult to prepare, the cost ishigh, the reaction steps are many, and the yield is low. The preparation method is an eco-friendly preparation process.

The invention discloses a synthesis method of 2-trifluoromethyloxazole derivatives. The method is as follows: dissolving enamine compounds of which the beta-positions are not replaced in an anhydrous aprotic solvent; and oxidizing the 2-trifluoroacetyl in the presence of bis(trifluoroacetoxy)iodobenzene to further perform intramolecular condensation with amino, thus obtaining the 2-trifluoromethyloxazole derivatives. In the method, simple and available enamine compounds of which the beta-positions are not replaced are utilized as substrates, and a nontoxic and environmentally-friendly solid reagent, namely bis(trifluoroacetoxy)iodobenzene is utilized as a fluorinating agent; and the method has the advantages that the operations are simple, the conditions are mild, and the synthetized substituted 2-trifluoromethyloxazole derivatives are difficult to prepare by virtue of other methods, and the like.

The invention discloses a rapid growth method of large-sized graphene glass. The method comprises the following steps that 1) large-sized quartz glass is cleaned; 2) the cleaned quartz glass is placedinto a high-temperature tube furnace, wherein the temperature in a reaction cavity is 1000-1100 DEG C, and the reaction cavity is vacuumized and air is evacuated until the vacuum degree is 10 Pa or below; 3) Ar and H2 are led into the reaction cavity, ethyl alcohol steam is led into the reaction cavity after airflow is stable, and then a graphene growth process is started, wherein the growth timeis 4-30 minutes; and 4) after growth of graphene is completed, the ethyl alcohol steam is cut off, the Ar and H2 flow rate is decreased, Ar / H2 is cut off after the temperature is decreased to the room temperature, and then the large-sized graphene glass is obtained. According to the rapid growth method provided by the invention, the preparation time of the graphene glass is shortened to be 4-30 minutes from a few hours, and by adopting the rapid growth method, graphene glass of a larger size can be prepared.

The invention relates to a preparation device of a lithium battery current collector, which is used for preparing a current collector on the surface of a polymer. The device comprises a first flange interface and a second flange interface which are formed in a vacuum chamber; anion source module is arranged on the first flange interface; a magnetic filtering module is arranged on the second flangeinterface; and each rotating shaft is arranged in the vacuum chamber, each rotating shaft is in the shape of a hollow circular column, each rotating shaft is in contact with a polymer, and each rotating shaft is used for conveying the polymer to pass through the vacuum chamber. According to the invention, the material processing difficulty in the preparation process of the current collector is greatly reduced, covering and depositing metal ions on the object is performed to realize the preparation of the current collector, the thickness of the prepared current collector is greatly reduced, the current collector below 6 microns is prepared, a copper foil does not need to be calendered, and the prepared current collector is balanced in hardness and toughness, so that the current collector is not easy to tear and damage, and the prepared current collector can be produced in batches, is high in yield and is not easy to damage during surface punching.

The invention relates to the technical field of organic light-emitting diode manufacturing, in particular to preparation of a top-emitting organic light-emitting diode (OLED) device anode structure. The top-emitting OLED device anode structure is characterized in that four layers of thin films cover a substrate, a base compatible layer, a middle reflectivity layer, a energy level matching layer and an anode modifying layer are respectively arranged on the substrate from bottom to top, multifunctionality of an anode is achieved through adoption of the design of a multi-layer thin film structure, light-emitting efficiency of a top-emitting OLED device is obviously improved, and the service life of the top-emitting OLED device is obviously prolonged. Furthermore, due to the fact that the anode is prepared by materials which are not prone to occurrence of element diffusion, probability of occurrence of shot circuit of device pixels due to the element diffusion is reduced. Due to adoption of metallic simple substance or alloy or metallic compound, raw materials can be easily obtained and are low in price, and thin film preparation methods are various.

An analog electrode device for space charge detection of a cable insulation layer is characterized by comprising a test probe mechanism, a grounding mechanism and a target cable equivalent insulationlayer sample disposed between the test probe mechanism and the grounding mechanism, wherein shielding layers are provided on both sides of the target cable equivalent insulation layer sample; the testprobe mechanism comprises a guiding rod and a pressure equalizing ball and an electrode disposed at both ends of the guiding rod, wherein the outside of the guiding rod is provided with a tetrafluoroethylene column and a metal cavity filled with epoxy resin in sequence. The analog electrode device provided by the invention can simulate the space charge distribution information of the target cableunder operating conditions according to the structural size of the cable and the selection of the insulating material before the target cable is officially produced.

The invention discloses a preparation method of multi-substituted cyclic amidine, belonging to the technical fields of chemical pharmacy and fine chemical engineering preparation. The preparation of the multi-substituted cyclic amidine is realized, namely, the preparation of multi-substituted alpha-allyl cyclic amidine is realized, the multi-substituted cyclic amidine is efficiently produced at high selectivity by using the reaction of azide and alkyne through metal catalysis and a cyclic rearrangement reaction, and a relative configuration of a product can be effectively controlled. The invention provides a new technical route for efficiently preparing a functionalized cyclic amidine derivative, and is widely applied in the fields of chemical pharmacy and fine chemical engineering.

The invention discloses an electrolytic polishing solution for titanium and titanium alloys and an electrolytic polishing process. The polishing solution is prepared from perchloric acid with a volume fraction of 8-15% and acetic acid with a volume fraction of 85-92%. The polishing solution is convenient to obtain materials, easy to prepare and store, simple polishing equipment, easy to operate, can greatly reduce the stress on the surface of the sample, and at the same time the surface is smooth and flat, without obvious scratches and oxide films, and the recognition rate of EBSD patterns is high. Improve detection accuracy.

The invention discloses a method for synthesizing a chiral 3-amino-3-phenyl-2-hydroxy carboxylate compound. The method comprises the following steps: by taking nitrobenzyl and glyoxylate compounds as raw materials, reacting in an organic solvent under the catalysis of chiral organic alkali to prepare a 3-nitro-3-phenyl-2-hydroxy carboxylate compound, and performing reductive acylation to prepare the chiral 3-amino-3-phenyl-2-hydroxy carboxylate compound. According to the method disclosed by the invention, the raw materials are cheap and easily available, few steps are required for preparing the chiral 3-amino-3-phenyl-2-hydroxy carboxylate compound, and the final yield is high; the method is mainly applied to synthesis of a medical intermediate-chiral 3-amino-3-phenyl-2-hydroxy carboxylate compound.