30results about How to "Does not dissolve" patented technology

The present invention relates to a composite metal palladium membrane or alloy palladium membrane, it is characterized by that the external surface of porous base membrane is almost completely covered with metal palladium membrane or alloy palladium membrane, and said metal palladium membrane or alloy palladium membrane can be deposited in the pore channel of base membrane in small quantity, and its preparation method includes the steps of utilizing sensibilization and activation process to form palladium nucleus on the external surface of porous base membrane and adopting chemically-plating process to form palladium membrane. Said invention also provides the characteristics of said preparation method.

The invention provides a PVDF-HFP / PMMA / CMC composite membrane and a preparation method thereof, which belong to the technical field of composite membranes, and include PVDF-HFP / PMMA thin films and CMC thin films arranged in layers. The composite membrane of the present invention can store more ions, improve the liquid absorption rate and liquid retention rate, and the more electrolyte solution absorbed, the corresponding free Li + The greater the number, the smaller the bulk resistance of the composite membrane, and the greater the corresponding ionic conductivity. The data of the embodiment shows: the crystallinity of the composite film is low, the ion conductivity reaches 4.388mS / cm, and the electrochemical stability window is 4.8V; the first discharge specific capacity of the half-cell assembled by the composite film is 162.5mAh / g; After 100 cycles, the capacity retention rate is 86.22%. When the current rate is 2C, the discharge specific capacity of the composite film is 139.7mAh / g; the composite film can be safely applied to lithium batteries.

Characters of the invention are that LiFePO4 prepared through method of high temperature solid phase is olivine type structured active material of battery; the anode material of lithium ion battery in use for miner's lamp gives full play to features of simple preparing technique, low cost, high safety performance and environment friendly. With LiFePO4 being as anode material and packed by aluminum-plastic, lithium ion battery for miner's lamp can pass each security testing. The material possesses foreground applicable to anode material of lithium ion battery in use for miner's lamp.

The invention discloses a steel for an engine non-quenched and tempered crankshaft, which comprises the following chemical elements in terms of percentage content: C: 0.37-0.42; Si: 0.50-0.65; Mn: 1.30-1.50; S: 0.045-0.060; Ni : 0.120~0.150; P: 0.010~0.025; Cr: 0.10~0.20; Mo: 0.015~0.050; Cu: 0.03~0.20; Ni: 0.120~0.150; V: 0.08~0.13; Al: 0.010~0.015; 0.010; N: ≥150ppm; Al-N ratio ≤ 1, Ti-N ratio ≤ 0.67. The invention also discloses a method for preparing a steel forging for an engine non-quenched and tempered crankshaft. The invention increases the strength of the crankshaft, improves its toughness and plasticity, and achieves the purpose of improving the comprehensive mechanical properties of the crankshaft.

The invention discloses a preparation method of hard alloy with orientational distribution of featured crystal surfaces of WC crystal grains and belongs to the technical field of hard-alloy metallurgy. The preparation method comprises the following steps of: by adopting a mixture of tungsten oxide, cobalt oxide and carbon material as a raw material, carrying out mixed ball grinding; carrying out cold pressing on ball-ground mixed powder to form a blank, and putting the blank in a vacuum reaction furnace to carry out in-situ reduction and carbonization reaction to obtain WC-Co composite powder containing carbon-deficient phase components under lower temperature; and finally, putting the prepared composite powder in a sintering system which can apply sintering pressure to carry out in-situ reaction sintering densification on the powder to obtain the hard-alloy block material with orientational distribution of the featured crystal surfaces of the WC crystal grains. The preparation method has the advantages of simple process step, short preparation period and low sintering temperature and the like in the aspects of preparing the composite powder and sintering the hard-alloy block material; and the hard-alloy block prepared by sintering has controllable size of the WC crystal grains, obvious anisotropy of structures and mechanical properties and strong repeatability.

The invention discloses a low-voltage soft-state corroded anode aluminum foil, a preparation method and application thereof. The preparation method of the low-voltage soft-state corroded anode aluminum foil includes the following steps: S1 electrochemical corrosion: galvanic corrosion is carried out in acid, and water washing is carried out after the corrosion is completed; S2 sintering treatment: forming an oxide film on the surface of the aluminum foil; S3 treatment: the Passivation treatment of aluminum foil in passivation solution; S4 water washing: wash the aluminum foil after intermediate treatment with water; S5 repeat steps S1-S4, repeat 10-12 times; S6 wash with water after chemical cleaning, and then perform stabilization treatment, drying Dry treatment to obtain a low-pressure soft-corrosion anode aluminum foil. In step S2, the burning temperature is 200-400° C., and the burning time is 0.3-1 minute. The low-voltage soft-state corrosion anode aluminum foil of the present invention has a chemical specific volume of 18.3-19.97 μf / cm at 70V and 140V 2 And 5.23~5.51μf / cm 2 .

The invention specifically relates to a high-efficient extraction agent for synchronous extraction of four effective functional components from cape jasmine fruits, and an extraction, separation and purification process. The key of the invention is to innovate a new extraction agent, and a water extraction technology containing a certain of stabilizer and / or cosolvent is adopted for replacing a percolation extraction or alcohol extraction process which is commonly used in the current production process, so that the production period is greatly reduced and the production and processing cost is effectively lowered; and the invention further comprises a process technology integrating online membrane separation and concentration with double-column tandem column chromatography for purification and integration, which can realize high-efficient preparation of various functional components from cape jasmine. The extraction agent disclosed by the invention has the advantages of low cost, small using quantity and no residues, and can obviously improve the dissolution rate of terpenoid and phenol compounds in raw materials of the cape jasmine fruits and enable the product extraction rate to exceed 95%; and the method is also suitable for extraction, separation and preparation of the functional components in other parts of the raw materials in addition to the cape jasmine fruits.

The present invention relates to an adhesive film for protecting a wafer including an adhesive layer formed on one surface of a substrate film. The present invention relates to an adhesive film for protecting the surface of a semiconductor wafer, wherein the surface film has a tensile strength of 2-10 kg / mm2 and an elongation until breakage of 50-200%, and the gel content of the adhesive layer is greater than or equal to 80%. The adhesive film for protecting the wafer maintains cutting ability and machinability, while preventing the generation of bending and wafer breaking phenomena due to the decrease of the wafer thickness. In addition, the adhesive film may not melt at high temperatures, and the yield while grinding the wafer may be increased.

The present invention particularly relates to a nature crocin extraction separation method and preparation for a crocin blood fat reduction drug. The extraction separation method comprises: carrying out cleaning and impurity removing on dried cape jasmi fruits, extracting with deionized water, filtering to removing residue, carrying out online membrane separation and concentration fusion and macroporous absorption resin chromatography purification, and finally carrying out low-temperature spray drying to prepare the crocin. According to the present invention, the key of the invention is to create the extraction agent, and the water containing a certain auxiliary solvent is adopted to extract the crocin, wherein the extraction rate can be more than 95%; the online membrane separation and concentration fusion and the macroporous absorption resin chromatography purification are integrated; the high purity crocin production method has a characteristic of low cost and is suitable for industrial expansion production; and the compounded pharmaceutical preparation has effects of significant blood fat reduction, no side effect, effective cardiovascular and cerebrovascular related disease prevention, and blood circulation promotion, and is the preferred health care drug for crowds with high blood pressure, high blood fat and high blood sugar.

The invention discloses a high-corrosion-resistant zinc-aluminum-magnesium hot-dipped steel plate and a production method thereof, which includes a substrate and a coating coated on the substrate, and is characterized in that the mass percentage of the chemical composition of the coating is: Al 1.8~2.3%, Mg 1.2~1.8%, RE 0.01~0.08%, Cu 0.003~0.008%, the balance is Zn and other unavoidable impurities; Cu is added to the plating solution in nanometer form when the plating solution melts . Cu in the coating of this steel plate is added in the form of nano-copper when the plating solution melts. Since the temperature of the zinc solution is low when it is added, the morphology of Cu particles can be guaranteed, and its fine and dispersed characteristics can play a role in precipitation strengthening, thereby Improve the hardness of the coating; the addition of rare earth RE can refine the coating structure and improve the fluidity of the plating solution, thereby more effectively improving the corrosion resistance of the coating. The structure in the coating of the product gained by this method is: primary Zn, Zn / MgZn 2 Binary eutectic, Zn / Al / MgZn 2 Ternary eutectic and nano-copper; the corrosion resistance is equivalent to 10 to 15 times that of pure zinc plates of the same thickness.

The invention provides a screw hole protective adhesive, a preparation method and application thereof. The screw hole protective glue includes the following components in mass percentage: 15-20% of 2-acrylamide-2-methylpropanesulfonic acid, 16-23% of amide monomer, 15-20% of acrylate, trehalose 5-8%, transparent powder 10-20%, fumed silica 0.5-2% and initiator 2-3%. The preparation method comprises the following steps: mixing 2-acrylamide-2-methylpropanesulfonic acid, trehalose and water to obtain a mixture A; mixing the mixture A, fumed silica and transparent powder to obtain a mixture B; and then Mixing the mixture B, amide monomer and acrylate to obtain a mixture C; mixing the mixture C with an initiator to obtain the screw hole protective glue. The screw hole protective adhesive provided by the invention is high temperature resistant, odorless, non-toxic, environmentally safe and can meet the processing requirements for surface treatment of structural parts of precision electronic products.

Provided is a lithium cobalt oxide positive-electrode material, said material being a composite structure having a doped lithium-cobalt-oxide substrate and surface coating; the general formula of said doped lithium-cobalt-oxide substrate is Li 1+zCo 1-x-yMa xMb yO 2, wherein 0≤x≤0.01, 0≤y≤0.01 and -0.05≤z≤0.08; said Ma is a doped invariable-valence element, at least one of Al, Ga, Hf, Mg, Sn, Zn, and Zr; said Mb is a doped variable-valence element, at least one of Ni, Mn, V, Mo, Nb, Cu, Fe, In, W, and Cr; the surface coating layer is a high-voltage (>4.5 V) positive-electrode material. By means of substitution doping of the variable-valence element, distortion resulting from delithiation of the layered structure is reduced by the maximum extent; the variable-valence element is doped by means of gaps, and during the process of charging, the oxidation of Co 3+is reconciled and delayed. The surface coating layer of the high-voltage positive-electrode material has a stable structure at voltages of 4.5 V or higher, and is capable of isolating an electrolyte solution and a lithium-cobalt-oxide substrate, thus reducing side reactions between the two and inhibiting the dissolution of transition metals; it also provides electrochemical energy.