33results about How to "No structural defects" patented technology

The invention relates to a method for preparing graphene through phase peeling of graphite by using a mixed solvent. The method comprises the following steps: 1, preparing a mixed solvent composed of at least two organic solvents having boiling points of not greater than 100DEG C; 2, adding powdery graphite to the mixed solvent to prepare a mixed solution of the powdery graphite, putting the mixed solution of the powdery graphite in an ultrasonic machine, carrying out water-bath ultrasonic treatment, and centrifuging through using a centrifuge; and 3, taking a supernatant obtained after the centrifuging with a pipette to obtain a graphene dispersion uniformly dispersed in the mixed solvent. The method enables the Hansen solubility parameters of the mixed solvent to reach the Hansen solubility parameters of graphene as possible through adjusting the volume ratio of the organic solvents in order to obtain a solvent which is most suitable for peeling and dispersing graphene, and the solvent is used to carry out the phase peeling of graphene.

The present invention provides a high-toughness polyester alloy composition and a preparation method thereof, wherein the composition mainly comprises the following raw materials by weight: (A) polybutylene terephthalate, (B) polyethylene terephthalate, and (C) an ionomer compound using an ethylene octene copolymer as a matrix. The preparation method comprises: adding (A) polybutylene terephthalate, (B) polyethylene terephthalate, (C) an ionomer compound using an ethylene octene copolymer as a matrix and other additives to a high speed material mixer, adding to a twin-screw extruder after the mixing, and carrying out melt extrusion granulation. According to the present invention, the polyester resin alloy reinforcing material composition has good impact resistance and good fluidity, and the product prepared by using the high-toughness polyester resin alloy reinforcing material composition has characteristics of low warping, high strength and high toughness, and is suitable for vehicles, mobile phones, and notebook computer products.

The invention discloses a preparation method of an anti-corrosion film. The preparation method comprises the following steps that (1), boric acid and tetraethyl orthosilicate solutions are mixed to obtain a solution A; (2), the solution A is mixed with bismuth nitrate to obtain an anti-corrosion intermediate body; (3), the intermediate body is filmed to obtain an intermediate body film; and (4), the intermediate body film is subjected to heat treatment, and is heated firstly and then cooled to obtain the anti-corrosion film. The corrosion resistance time of the anti-corrosion film is prolonged, and the higher corrosion resisting effect is achieved.

The invention relates to a cooling and sterilizing process for a protein preparation and a special horizontal type shaking table thereof. In the prior art, a sterilizing device for the protein preparation has the defects of poor stability and difficult control of parameters. The special shaking table comprises a cycloidal pin wheel speed reducer, a driving motor and a shaking table, wherein an eccentric outer gear, an eccentric inner gear, a gear shaft sleeve and a left gear base are fixedly arranged on the cycloidal pin wheel speed reducer and an output shaft of the driving motor; the left gear base is connected with one end of a regulating lead screw; the other end of the regulating lead screw is connected with a right bearing base; a shaking amplitude adjustment device is connected with the bearing base and one end of a shaking oscillating bar; the other end of the shaking oscillating bar is connected with one end of a rotating shaft of the shaking oscillating bar; and the other end of the rotating shaft of the shaking oscillating bar is connected with the shaking table by a transmission device in a shaking table cylinder body. The special horizontal type shaking table has a reasonable and compact structure, is reliable in strength, rigidity and toughness of key positions, small in assembly stress of parts and high process performance, process parameters are easy to control, and the optimal bacteriostatic effect can be achieved.

The invention provides an energy-saving sheet material and a manufacturing method thereof. The energy-saving sheet material comprises at least one layer of upper sheet material, at least one layer of lower sheet material, at least one layer of inner sheet material and a plurality of support structures, wherein the upper edge of the upper sheet material and the lower edge of the lower sheet material are respectively straight lines; the inner sheet material is arranged between the upper sheet material and the lower sheet material, and the sheet materials in adjacent layers are separated by the support structures; an exhaust port is formed in the side of the inner sheet material, and is a through groove penetrating through the upper surface and the lower surface of the inner sheet material; the edges of the upper sheet material, the lower sheet material and the inner sheet material are sealed and closed by a sealing material, so that vacuum layers are formed among the sheet materials; an exhaust pipe is arranged in the exhaust port, the open end of the exhaust pipe is positioned on the inner side of the exhaust port, and the closed end of the exhaust pipe is positioned on the outer side of the exhaust port and exists in the space formed between the upper sheet material and the lower sheet material. The energy-saving sheet material is fully planar and is free of structure defect, so that the using strength of the energy-saving sheet material is enhanced.

An open magnetic circuit type multilayer coil free from a structural defect such as interlayer separation or cracking. On both major surfaces of a nonmagnetic layer (13) are provided a layered body (10) where magnetic layers (11) are formed and a coil (L) where coil conductors (15, 16) that are formed on the layered body (10) and have a specified thickness are spirally interconnected. The coil conductor (16), out of the coil conductors (15, 16) formed in the layered body (10), located on the major surface of the nonmagnetic layer (13) has a small thickness that is not greater than 0.6 times those of the magnetic layer (11) and the nonmagnetic layer (13) but is greater than 0.1 times that of the coil conductor (15) not located on the major surface of the nonmagnetic layer (13).

The invention relates to a normal-temperature curable waterborne damping paint, which is composed of the following raw materials by weight: 30-50 parts of a water-based acrylic emulsion; 35-55 parts of filler; 0.2-1 part of a dispersing agent; 3-10 parts of a film-forming agent; 0.3-1 part of a defoaming agent and 0.3-1 part of an adhesion promoter; 0.1-0.4 part of an antirust agent; 1-4 parts ofpurified water; 0.5-3 parts of a thickening agent; and 0.05-0.3 part of a multifunctional assistant. The damping paint has the advantages of high damping properties, strong bonding force, high self-strength, flash rust resistance, corrosion resistance, environmental friendliness and the like.

The invention relates to a one-time curing molding all-composite material engine jet pipe, which comprises a throat liner, a convergent section, a heat insulation layer, an inner ablation layer and a composite material shell, the throat liner is used as an initial surface layer, and the convergent section, the ablation layer, the heat insulation layer and the composite material shell are sequentially rotated from inside to outside to form the jet pipe; after all winding work is completed, one-time hot-pressing curing forming is integrally carried out; the convergence section is formed by integrally winding carbon fiber cloth tape prepreg; the ablation layer is formed by winding fibers or cloth tapes on the throat liner and the mold; the thermal insulation layer is formed by obliquely winding fibers or cloth tape prepreg on the outer side of the ablation layer; and the composite material shell is formed by laying or winding fibers or cloth tapes on the outer side of the heat insulation layer. Through the co-curing technology of the transition structure resin, curing of different structures and functional layers of the composite material spray pipe is completed at a time, chemical structural mutation does not exist on an interface, therefore, the interface strength is improved, the debonding risk does not exist, and meanwhile the production period of the all-composite material spray pipe is shortened.

The invention belongs to the technical field of heat conduction materials, and particularly relates to a polyimide film and a preparation method thereof. The invention provides a polyimide film preparation method, which comprises: 1, dissolving a diamine monomer and a dianhydride monomer in an aprotic polar solution under a protection atmosphere, and stirring at a low temperature to prepare a first polyamide acid solution; 2, sequentially carrying out low-temperature standing defoaming and vacuum defoaming treatment on the precursor polyamic acid solution to obtain a second polyamide acid solution; and 3, coating the second polyamide acid solution on a base material, drying, carrying out a thermal imidization reaction, and separating the polyimide film from the base material to prepare thepolyimide film. The invention provides the polyimide film and a preparation method thereof. The technical defects that an existing polyimide film is uneven in thickness and incomplete in thermal imidization can be effectively overcome.

A mold-locking head plate of an injection molding machine comprises a body, guiding column mounting holes are formed in the four corners of the body correspondingly, unloading grooves are laterally formed in the four corners of the body correspondingly, the unloading grooves communicate with the guiding column mounting holes, and the unloading grooves are narrowed from groove openings to the groove bottoms. The guiding column mounting holes are used for mounting guiding columns, in the mold locking process, the surface of the body deforms towards the interiors of the unloading grooves, distribution of the tensile force of the guiding columns to the body moves towards the center of the body, action points of the tensile force moves towards the center of the body along with the change trendof stress distribution, thus the force arm from the action points of the tensile force to the center of the body is shortened, the deformation of the middle of the body is decreased, it is ensured that a whole device operates stably in the production process and is small in vibration, the using amount of materials for manufacturing of the mold-locking head plate is decreased, and the cost is lowered; and according to computer finite element analysis comparison, the deformation of the mold-locking head plate is smaller than that of a common mold plate by about 20%, and mold plate rigidity is effectively improved.

The invention relates to a liquid phase spherical carrier, and a preparation method and applications thereof, and more specifically discloses a spherical carrier can be used for liquid phase synthesis. The spherical carrier possesses a structure represented by formula I, wherein R is used for representing a functional group selected from groups containing hydroxyl, amino, carboxyl, or halogen preferably. The liquid phase synthesis carrier can be used for liquid phase synthesis of polypeptides. The preparation method is simple; and synthesis efficiency is high.