55results about How to "Guaranteed chemical properties" patented technology

The invention relates to a magnetic graphene oxide composite nanomaterial and a preparation method thereof. The material is prepared from graphene oxide, magnetic nano particles and a polydopamine shell layer; graphene oxide is connected with the magnetic nano particles wrapped by polydopamine, polydopamine serves as a connecting arm between the magnetic nano particles and graphene oxide, and the magnetic nano particles are immobilized on the surface of graphene oxide. When the material is prepared, the magnetic nano particles with stable citric acid are firstly prepared according to a solvothermal method, and then the surfaces of the magnetic nano particles are wrapped by the polydopamine shell layer in an alkaline buffer solution; finally, hydrogen bonds between polydopamine and graphene oxide and pi-pi interact, and the magnetic graphene oxide composite nanomaterial is prepared. The material has the common properties of graphene oxide and the magnetic nano particles, the hydrophilic performance of the material is improved through introduction of polydopamine, and the method is mild in condition and high in expansibility, and preparation is easy and convenient.

The invention provides a high-accuracy TA18 titanium alloy pipe preparation method comprising the steps of preparing material, melting, putting a titanium alloy ingot into a resistance furnace to heat until temperature reaches up to 850 DEG C to 900 DEG C, forming a titanium alloy sheared billet after preserving heat for one to three hours and mounding and drawing for several times, rolling a titanium alloy pipe blank, rolling roughly, rolling precisely, and annealing. A titanium alloy pipe produced by utilizing the high-accuracy TA18 titanium alloy pipe preparation method is high in finished product rate, low in production cost, good in fineness which can reach h6, reasonable in crystal structure, and pretty high in practical value.

The invention discloses an intelligent sample collecting device which comprises a machine frame. The machine frame is provided with a feed inlet. A rotatable rotating disc mechanism and multiple sample storage barrels used for collecting samples are arranged in a collecting cavity formed by the machine frame. The sample storage barrels are hung on the rotating disc mechanism. Each sample storage barrel is provided with a hinged barrel cover and an induction locking mechanism used for locking the barrel cover. The hinged position of the barrel cover is provided with an elastic part so that the barrel cover can bounce upwards to be opened when not locked. The feed inlet is provided with a liftable weighing mechanism. The weighing mechanism is provided with an induction unlocking assembly matched with the induction locking mechanism. When the rotating disc mechanism drives the sample storage barrels to rotate to the position below the feed inlet, the weighing mechanism raises to lift up the sample storage barrels, so that the induction locking mechanism induces an unlocking signal of the induction unlocking assembly to open the barrel covers for sample connection and weighing operation. The intelligent sample collecting device has the advantages that the structure is simple and compact, the intelligence degree is high, sample collection and transfer safety is high, sample collection quality precision is high, working efficiency is high, and the production cost is low.

The invention discloses a rare-earth noctilucent plastic injection molded part. The rare-earth noctilucent plastic injection molded part comprises 60-90wt% of an injection-moldable plastic, 6-10wt% of a flexibilizer, 3-35wt% of rare-earth noctilucent powder, 0.1-0.5wt% of an anti-ultraviolet agent, 0.1-0.5wt% of an antioxidant, 0.1-2wt% of other assistants, and 0.02-2wt% of a paint. A novel rare-earth noctilucent plastic section bar is a sheet, and comprises the injection molded part and a paint film, and the paint film is obtained through spray-coating the paint on the unidirectional side of the inner concave surface of the injection molded part, and has a uniform thickness. The prepared plastic section bar has a good luminescent characteristic because of the adoption of the environmentally-friendly, safe and nontoxic rare-earth alkaline-earth aluminate type long-acting noctilucent powder long-afterglow luminescent material. The novel rare-earth noctilucent plastic section bar has the characteristics of long continuous luminescence time, high luminescence brightness, stable luminescence and the like. The possessing of the color-adjustable paint film makes the paint film be seen from all the surfaces except the oil paint film spray-coating surface of the novel rare-earth noctilucent plastic section bar. The original specific physical and chemical performances of the injection-moldable plastic are guaranteed.

The invention discloses a formula of cell factor and compound and action to regenerate nerve and diagnose the nerve system, which is fit for insuline, bovine serum albumin, putrescine, hydrocortisone, luteohormone, transferrin, sodium selenite, alkaline cellulose cell growing factor and epiderm growing factor.

This invention relates to a second battery with different electrolytes, which solves the problems of the solid storage battery with low capacity when entering the activity subject holes and capillary. The invention relates adopts abio-compound fiber material package electrode board as isolation board and filling the hydraulic electrolytes between the electrode and the isolation board. The invention overcomes the above shortcomings and has a battery with good quality and solid electrode board.

To increase cooling efficiency in an electronic cooling device for cooling equipment having an electrical heating element, and to simplify installation to a substrate having an object to be cooled. The electronic cooling device comprises: a thermoelectric module 10 having a endothermic surface 10a and a heat radiation surface 10b; a heat radiation member 20 thermally connected to the heat radiation surface 10b; a heat-conducting member 30 whose one surface is thermally connected to the endothermic surface 10a and the other is thermally connected to the object 40 to be cooled; and an engagement member 50 that fixes the object 40 to be cooled and the heat-conducting member 30 and is mounted to the heat-conducting member 30. In this manner, penetration by heat transfer from the heat radiation member 20 is prevented to fix the engagement member 50 and the substrate 45 for retaining the object 40 to be cooled, thus increasing the cooling efficiency. Additionally, the object 40 to be cooled can be adhered to the heat-conducting member 30 even for the object 40 to be cooled, where the through hole cannot be opened from the rear.

The invention provides rustproof water-based grinding fluid with high settleability. The rustproof water-based grinding fluid is characterized by comprising the following components in percentage by mass: 5-15 percent of a settling agent, 5-10 percent of flocculating agents, 15-30 percent of lubricants, 25-30 percent of rustproof agents, 1-2 percent of sterilizing agents, 1-5 percent of coupling agents, 1-2 percent of anti-foaming agents and the balance of water; the settling agent is a mixture of organic sulfur, ethylene glycol monobutyl ether and poly-dichloro ethyl ether tetramethyl ethylenediamine. According to the rustproof water-based grinding fluid with high settleability, the problem that fine dust such as iron powder, oil stone powder and the like cannot be effectively settled in a quilted grinding process is solved, the grinding fluid can keep long-term and stable lubrication performance and cleaning performance during processing, and is long in service life, high in rustproof performance and high in comprehensive performance.

The invention relates to a method for fixing a tissue block by a formaldehyde fixative. The method comprises the following steps: (1) soaking the tissue block into the neutral or subalkaline formaldehyde fixative in a reaction vessel and stirring the tissue block; (2) using an on-line pH detector to continuously detect the pH value of the fixative, recording the processing time when the pH value of the fixative reaches a subalkaline alarm pH value, and then replacing the fixative; and (3) repeating step (2) until the pH value of the fixative is still more than or equal to 7.0 when the fixative is treated for the time as the last processing time, namely reaching the reaction end point of the tissue block processing. The method is a method for fixing the tissue block by the formaldehyde fixative, which meets the scientific and technological principle and has source basis. The method can be used for commodity type automatic pathologic tissue processing equipment and realize the intelligent and full automatic working mode in the process of fixing the tissue block by the neutral (or subalkaline) formaldehyde fixative .

The invention relates to a method for preparing a tetramethyl bisphenol F type cyanate resin prepolymer and relates to a method for preparing a cyanate resin prepolymer. Different from the prior art, in the method, other byproduct isomers are not generated. The method comprises the following steps of: heating solid tetramethyl bisphenol F type cyanate resin serving as a major material for dissolving in a nitrogen atmosphere; adding a polymerization accelerant serving as an auxiliary material into the liquid etramethyl bisphenol F type cyanate resin, and stirring uniformly; continuing to raisethe temperature, and maintaining the temperature in an environment at 150 to 170 DEG C under the protection of nitrogen; when the refractive index is between 1.5750 and 1.5650/84 DEG C/84 DEG C, cooling to obtain a liquid reactant; allowing the liquid reactant to break away from the nitrogen atmosphere; and adding butanone into the liquid reactant, stirring uniformly and cooling to obtain the tetramethyl bisphenol F type cyanate resin prepolymer, wherein the yield is 99.85 percent. By the method, the original chemical property and excellent electrical performance of the product are maintained, and the product is stable under the condition that curing time is shortened within one hour.

The invention relates to a preparation process of zinc oxide which is used on rubber, which uses indirect zinc oxide as raw material, and prepares zinc oxide for rubber through conducting surface process, filter-pressing, drying, calcination activation and disintegration for indirect zinc oxide raw material, wherein the surface process is that conducting slurry which is prepared through mixing indirect zinc oxide with water-based auxiliary agent and surface activator with activating processing for 7-9 hours under the condition of 60-100 Celsius temperature and 0.05-0.8 MPa pressure. Zinc oxide for rubber whose specific surface area is 8-30m2/g can be prepared through the process which is simple.

A multiple-effect hot air seed drying device comprises a machine body. A rack is arranged at the lower end of the machine body. Foot wheels are arranged at the bottom end of the rack. A drying box is arranged at the upper end of the rack. A dehumidification device is arranged at the left side of the top end of the drying box. A first hot air device is arranged in the middle of the top end of the drying box. A second hot air device is arranged at the middle end of the left side of the drying box. A controller is arranged at the upper end of the right side of the drying box. A third hot air device is arranged at the middle end of the right side of the drying box. A temperature sensor is arranged at the upper end of the left side in the drying box. A humidity sensor is arranged at the upper end of the right side in the drying box. Each of the left side and the right side of the bottom end in the drying box is provided with a circulating fan. A rotary screen is arranged at the middle end in the drying box. According to the multi-effect hot air seed drying device, the multi-effect hot air design is adopted, multi-side hot air drying is achieved, the seed drying efficiency is improved greatly, and the seed drying uniformity is improved greatly.

The invention discloses a preparation method of a high-temperature-resistant reinforced PC composite material. The method comprises the following steps of step 1, weighing the following raw materialsin percentage by weight: 51%-66% of a PC base material, 10%-15% of polyetherimide, 4%-6% of a compatilizer, 1%-2% of a flexibilizer, 3%-7% of chopped glass fibers, 13%-17% of long glass fibers, 0.3%-0.5% of an antioxidant, 0.3%-0.5% of a lubricant, 0.4%-0.8% of a flame retardant, 0.2%-0.4% of an anti-dripping agent and 0.01-0.03% of diffusion oil. Compared with the prior art, the high-temperature-resistance PC modified material developed by the invention has higher cost performance while ensuring the original physical and chemical properties, and therefore, the material is very popular with terminal customers.