42results about How to "Solve easy collapse" patented technology

The invention provides a production method of a super-hydrophobic polytetrafluoroethylene membrane. The method comprises the steps of preparing a spinning solution, producing fibers, and sintering, wherein a fiber forming carrier and a solvent are adopted to prepare a solution, a polytetrafluoroethylene emulsion is added, the fiber forming carrier is polyacrylic acid, and the solvent is water; and the sintering step adopts temperature programmed control sectional continuous sintering, and is characterized by carrying out heat insulation in flowing atmosphere at 90-120DEG C for 30-120min, heating to 260-300DEG C from 90-120DEG C at a rate of 3-10DEG C/min, carrying out heat insulation at 260-300DEG C for 30-120min, heating to 370-390DEG C from 260-300DEG C at a rate of 2-8DEG C/min, and carrying out heat insulation at 370-390DEG C for 5-120min. The method well solves the problem of easy collapsing of fibers in the sintering process of a polytetrafluoroethylene precursor membrane, and allows the beaded ultrafine fiber netted membrane, disordered stacking between fibers becomes mutual adhesion, and the fibers have the characteristics of uniform form, complete surface, and greatly improved strength and toughness, and can bear a certain vacuum pressure.

The invention belongs to the technical field of food processing, and discloses a nutrition stewing sauce and a preparation method thereof. The nutrition stewing sauce is prepared from the following raw materials by weight: 7-15% of ingredients, 7-16% of meat, 60-65% of water, 5-8% of modified starch, 1-5% of maltodextrin, 0.1-1% of beta-cyclodextrine, 0.1-2% of guar gum, 1-3% of xanthan gum, 0.01-0.02% of L-Ascorbyl palmitate, 0.4-1.0% of phospholipid, 0-0.3% of beta-carotene, 0.3-0.5% of salt, 0.01-0.05% of disodium nucleotide, 0.3-1.0% of aginomoto and 0.01-0.05% of sodium dehydroacete. The traditional nutrition stewing technology of slowly stewing by small fire at south of the five ridges is combined with the modern food processing technology to prepare the sauce special for baked food stuffing, and the traditional technology and the modern technology are perfectly combined.

The present invention provides a polytetrafluoroethylene fiber membrane preparation method, which comprises spinning liquid preparing, fiber preparing and sintering, and is characterized in that a polytetrafluoroethylene emulsion is added after a fiber-forming carrier and a solvent form a solution, wherein the fiber-forming carrier is polyacrylic acid, and the solvent is water; the sintering adopts the programmed temperature control sectional continuous sintering, wherein under a flowing atmosphere, thermal insulation is performed for 30-120 min at a temperature of 90-120 DEG C, heating is performed from 90-120 DEG C to 260-300 DEG C at a rate of 3-10 DEG C/min, thermal insulation is performed for 30-120 min at a temperature of 260-300 DEG C, heating is performed from 260-300 DEG C to 370-390 DEG C at a rate of 2-8 DEG C/min, and thermal insulation is performed for 5-120 min at a temperature of 370-390 DEG C; and the cooling treatment after the sintering comprises that the cooling is performed from 360-400 DEG C to 150-200 DEG C at a rate of 3-15 DEG C/min under a flowing atmosphere, thermal insulation is performed for 30-120 min at a temperature of 150-200 DEG C, and then natural cooling is performed.

The invention provides polypyrrole-coated cattail wool-based ultra-light biomass porous foam as well as a preparation method and application thereof. Cattail wool is subjected to alkali treatment, the cattail wool is fixed and does not collapse in water through a cross-linking reaction of tannic acid and polyvinyl alcohol, and the cattail wool is freeze-dried to obtain cattail wool-based ultra-light biomass porous foam; and then, the cattail wool is coated with polypyrrole generated through in-situ polymerization to obtain the polypyrrole-coated cattail wool-based ultra-light biomass porous foam. According to the mode, the prepared cattail wool-based ultra-light biomass porous foam is stable and does not collapse, has consistent graded channels, and promotes effective coating of polypyrrole, so that the salt resistance of the foam is effectively improved, and meanwhile, the photo-thermal conversion efficiency is enhanced; and the polypyrrole-coated cattail wool-based ultra-light biomass porous foam with excellent salt resistance and high energy conversion efficiency is obtained, and is applied to a solar steam generation system as a photo-thermal material.

The invention provides a preparation method of a polytetrafluoroethylene film. The preparation method comprises the steps of preparing a spinning solution, preparing fibers and sintering and is characterized by adding polytetrafluoroethylene emulsion after preparing a solution with a fiber forming carrier and a solvent, wherein the fiber forming carrier is polyvinyl alcohol, and the solvent is water; adopting multistep continuous sintering through program temperature control, and in flowing atmospheres, insulating at 90-120 DEG C for 30-120 minutes, increasing the temperature from 90-120 DEG C to 260-300 DEG C at a rate of 3-10 DEG C/min and insulating at 260-300 DEG C for 30-120 minutes; increasing the temperature from 260-300 DEG C to 370-390 DEG C at a rate of 2-8 DEG C/min and insulating at 370-390 DEG C for 5-120 minutes; carrying out cooling treatment after sintering: in the flowing atmospheres, reducing the temperature from 360-400 DEG C to 150-200 DEG C at a rate of 3-15 DEG C/min, insulating at 150-200 DEG C for 30-120 minutes and then carrying out natural cooling.

The invention provides a preparation method of a polytetrafluoroethylene film. The preparation method comprises the steps of preparing a spinning solution, preparing fibers and sintering and is characterized by adding polytetrafluoroethylene emulsion after preparing a solution with a fiber forming carrier and a solvent, wherein the fiber forming carrier is polyvinyl alcohol, and the solvent is water; adopting multistep continuous sintering through program temperature control, and in flowing atmospheres, increasing the temperature from a room temperature to 120-200 DEG C at a rate of 3-10 DEG C/min and insulating at 120-200 DEG C for 30-120 minutes; increasing the temperature from 120-200 DEG C to 360-400 DEG C at a rate of 2-8 DEG C/min and insulating at 360-400 DEG C for 5-120 minutes; carrying out cooling treatment after sintering: in the flowing atmospheres, reducing the temperature from 360-400 DEG C to 150-200 DEG C at a rate of 3-15 DEG C/min, insulating at 150-200 DEG C for 30-120 minutes and then carrying out natural cooling.

The invention provides a preparation method of a polytetrafluoroethylene film. The preparation method comprises the steps of preparing fibers with a fiber forming carrier and sintering and is characterized by adopting multistep continuous sintering through program temperature control, and in flowing atmospheres, insulating at 90-120 DEG C for 30-120 minutes, increasing the temperature from 90-120 DEG C to 260-300 DEG C at a rate of 3-10 DEG C/min and insulating at 260-300 DEG C for 30-120 minutes; increasing the temperature from 260-300 DEG C to 370-390 DEG C at a rate of 2-8 DEG C/min and insulating at 370-390 DEG C for 5-120 minutes. The preparation method has the beneficial effects that the problem that fibers are easy to collapse during sintering of a polytetrafluoroethylene precursor film is well solved; a reticular film with bead-like superfine fibers is obtained; the fibers adhere to each other instead of being stacked out of order; the fibers have uniform morphologies, intact surfaces and greatly improved strength and tenacity and can bear a certain vacuum pressure.

The invention discloses a permeable brick with high performance. A formula of the permeable brick comprises the following components in parts by mass: 10-15 parts of ceramic tile waste ceramic chip particles, 4-8 parts of titanium carbide, 10-15 parts of aluminum oxide, 10-15 parts of organic silicone resin, 13-15 parts of polyurethane resin, 7-10 parts of nanometer titanium dioxide, 20-30 parts of absolute ethyl alcohol, and 3-5 parts of a dispersing agent. The characteristic that organic silicone resin is converted into silica is used in order to solve the problem that micropore structures in the sintering process are easy to collapse, strength of permeable bricks is substantially improved, and density of the permeable brick is reduced.

The invention provides a preparation method of a polytetrafluoroethylene film. The preparation method comprises the steps of preparing a spinning solution, preparing fibers and sintering and is characterized by adding polytetrafluoroethylene emulsion after preparing a solution with a fiber forming carrier and a solvent, wherein the fiber forming carrier is sodium alginate, and the solvent is water; adopting multistep continuous sintering through program temperature control, and in flowing atmospheres, insulating at 90-120 DEG C for 30-120 minutes, increasing the temperature from 90-120 DEG C to 260-300 DEG C at a rate of 3-10 DEG C/min and insulating at 260-300 DEG C for 30-120 minutes; increasing the temperature from 260-300 DEG C to 370-390 DEG C at a rate of 2-8 DEG C/min and insulating at 370-390 DEG C for 5-120 minutes. The preparation method has the beneficial effects that the problem that fibers are easy to collapse during sintering of a polytetrafluoroethylene precursor film is well solved; a reticular film with bead-like superfine fibers is obtained; the fibers adhere to each other instead of being stacked out of order; the fibers have uniform morphologies, intact surfaces and greatly improved strength and tenacity and can bear a certain vacuum pressure.

The invention provides a preparation method of a polytetrafluoroethylene film. The preparation method comprises the steps of preparing fibers with a fiber forming carrier and sintering and is characterized by adopting multistep continuous sintering through program temperature control, and in flowing atmospheres, increasing the temperature from a room temperature to 120-200 DEG C at a rate of 3-10 DEG C/min and insulating at 120-200 DEG C for 30-120 minutes; increasing the temperature from 120-200 DEG C to 360-400 DEG C at a rate of 2-8 DEG C/min and insulating at 360-400 DEG C for 5-120 minutes; carrying out cooling treatment after sintering: in the flowing atmospheres, reducing the temperature from 360-400 DEG C to 150-200 DEG C at a rate of 3-15 DEG C/min, insulating at 150-200 DEG C for 30-120 minutes and then carrying out natural cooling. The preparation method has the beneficial effects that the polytetrafluoroethylene film with bead-like superfine fibers is prepared and a hydrophobic surface with a multistage coarse structure is formed together; the surface water contact angle is not less than 150 degrees and the porosity is higher than 80%; the problem that fibers are easy to collapse during sintering of a polytetrafluoroethylene precursor film is solved; the fibers have intact morphologies and surfaces and greatly improved strength and tenacity and can bear a certain vacuum pressure.

The invention relates to a preparation method of a sewage soil infiltration device, which comprises the following steps that: a plexiglass tube of which one end is closed and the other end is welded with a flange is taken, and a small sampling hole is drilled at the center of a circle of a closed end surface; a plexiglass tube of which both ends are welded with flanges is taken; a plexiglass tube of which one end is provided with an opening and the other end is welded with a flange is taken; a matrix is evenly filled in the three plexiglass tubes, and the flange end surfaces of the three plexiglass tubes are connected by bolts; and the sewage is continuously injected into the plexiglass tubes, and is sampled from the small sampling hole, and then the water outlet quality is analyzed and the water outlet quality is monitored. In the preparation method of the sewage soil infiltration device, the problems that the matrix is unevenly filled, a matrix layer collapses and the water flow is short-circuited in the traditional soil column simulation soil percolation process, can be solved, and the treatment effect of the sewage is improved.

The invention relates to a preparation method for an easy-suturing high-simulation tissue engineering neural repair scaffold. The preparation method comprises a step of preparing suspension, a step ofpreparing an array micro-pipe inner core, a step of preparing collagen outer skin and a step of cutting and assembling. The step of preparing the suspension comprises the following steps: weighing collagen and chitosan, after uniformly mixing, and dissolving in acetic acid solution. The step of preparing the array micro-pipe inner core comprises the following steps: enabling the suspension to beinjected in a mould, inserting a temperature conducting rod, immerging in liquid nitrogen and performing gradient cooling, freeze-drying, crosslinking, washing, freeze-storing and freeze-drying again.The step of preparing the collagen outer skin comprises the following steps: enabling the suspension to be injected in the mould, washing, drying, crosslinking, washing again, freeze-storing and drying again. The step of cutting and assembling comprises the following steps: cutting and assembling. The provided rational preparation method is capable of solving problems of an existing scaffold product that an internal three-dimensional structure is lacked and the collapse is easy, and solving a problem that the parallel and level tail end of the porous scaffold is not easily sutured.

The invention provides a semiconductor laser welding method and a semiconductor laser welding structure. The invention uses laser to activate metal complexes or melt solderable metal particles, so that the protection of solder is realized, the oxidation of the solder is prevented and the wettability of the solder can be ensured. The semiconductor laser welding method and a semiconductor laser welding structure can solve the problem of weak welding strength of a welding layer, and the problems of high probability of collapse and poor wettability of a welding ball.

The invention provides a vertebral prosthesis which is characterized in that a bone grafting space is arranged in a base body, and the base body is mounted in a vertebral body; a connecting hole is formed in the side wall of the base body and communicated with the bone grafting space, and the connecting hole is exposed out of the vertebral body; a bone grafting hole is formed in the end wall of the base body and communicated with the bone grafting space; a fastener penetrates in from the connecting hole and penetrates out from the bone grafting hole; and a connecting part which is matched with the fastener in a limiting manner is arranged in the connecting hole. According to the technical scheme, the problem that in the prior art, a vertebral body is prone to collapse is effectively solved.