9results about How to "Avoid oxygen" patented technology

The invention belongs to the technical field of coatings, and discloses an anti-yellowing and high-hardness UV (ultraviolet) laminating varnish as well as a preparation method and application thereof. The UV film coating varnish comprises six-functionality alicyclic polyurethane acrylic resin, two-functionality linear polyurethane acrylic resin, pure acrylic resin, an acrylate reactive diluent, a filler, an ultraviolet light absorber, a non-alkaline hindered amine free radical scavenger and a photoinitiator. The weight ratio of the six-functionality alicyclic polyurethane acrylic resin to the two-functionality linear polyurethane acrylic resin to the pure acrylic resin to the acrylate reactive diluent is (2.5-3.5): (1-1.5): 0.5: (2.0-3.0); the bifunctional linear polyurethane acrylic resin is prepared from the following raw materials: isocyanate, poly (1, 4-butanediol) and hydroxyethyl acrylate. A paint film formed by the UV film-coated varnish has good yellowing resistance and high hardness, and is not easy to crack after thermal cycling.

The invention discloses UV glue for a holographic IMR diaphragm and the holographic diaphragm prepared from the UV glue. The UV glue is prepared from the following raw materials: vinyl silane, polyester acrylate, aliphatic polyurethane acrylate, trifunctional sulfydryl modified acrylate, a bifunctional active monomer, a trifunctional active monomer and a photoinitiator. The bifunctional active monomer comprises one or more of dipropylene glycol diacrylate, tripropylene glycol diacrylate and triethylene glycol diacrylate. And the trifunctional active monomer is trimethylolpropane triacrylate or pentaerythritol triacrylate. A silicon-oxygen bond in the added vinyl silane has hydrophilicity and can be subjected to a hydrolysis reaction with water molecules in air in a high-temperature and high-humidity environment to generate a Si-OH intermediate, and then the Si-OH intermediate and the silicon-oxygen bond are condensed to form a Si-O-Si bond, so that the compactness of a cross-linked network is further enhanced; and the light-cured coating has excellent water resistance and temperature resistance.

The invention discloses a method for improving the fire extinguishing efficiency of an underground filling grouting material, and belongs to the technical field of mine fire prevention and control. The method comprises the following steps: mixing water and pulping raw materials according to a required water-cement ratio to prepare slurry; a chemical foaming agent component A is added into the slurry and fully mixed, then a chemical foaming agent component B is added, the chemical foaming agent component A contains carbonate, the chemical foaming agent component B contains acid, inert gas carbon dioxide is released after the component A and the component B are mixed, and slurry colloid foam is generated; injecting into a coal mine underground goaf through a grouting pipeline to extinguish fire and prevent fire; wherein the addition amount of the chemical foaming agent component A and the chemical foaming agent component B accounts for 5-18% of the weight of the slurry. A chemical foaming mode is adopted, a gas source is provided by means of carbon dioxide generated by chemical reaction of materials, the problem that traditional three-phase foam is insufficient in physical compressed air foaming capacity in long-distance high-position drilling is effectively solved, and the problem of continuous goaf oxygen supply under the condition of physical compressed air foaming is also effectively avoided.

The utility model discloses an anti -choking cough thickening powder intelligent dissolving stirring system relates to stirring equipment technical field, including base and the stirring drum of base top setting, still include shaking subassembly, shaking subassembly includes the sliding slot of opening in the top of base, and the sliding block is connected on the sliding slot, and the connecting rod is connected at the top of sliding block, and the push board is connected at the top of connecting rod, and the extension plate is connected on the sliding block, and the inclined block is connected on the extension plate, drive subassembly, drive subassembly includes the first fixed axle of rotation connection in the top of base, and the first gear is set up on the first fixed axle, and the drive board is connected on the first fixed axle, swing to the stirring process of stirring drum through setting shaking subassembly, break material static balance through dynamic shaking, eliminate the dead angle of stirring.

The utility model relates to a sewage treatment equipment for environmental protection engineering belongs to sewage treatment technical field, in order to solve the problem that the bubble diameter generated by traditional aeration is usually larger, the rising speed is faster, the oxygen utilization rate is lower, and cannot form the full mixing with sewage, the utility model discloses sewage treatment tank and the oxygen cavity of opening in sewage treatment tank inside, sewage treatment tank both sides are installed with pump body, a plurality of jet elements are fixedly installed in the oxygen cavity, and the pump body is communicated with a plurality of jet elements through the pipeline, and the one end of jet element is installed with suction shell, and the one side of suction shell is communicated with the water outlet pipe, and the rotating part is installed in the water outlet pipe, the utility model discloses through the treatment of jet breaking and rotary shearing, the bubble diameter is significantly reduced, and the specific surface area is greatly increased, and the rising path of bubble is changed by swing plate, prolongs its residence time in sewage, makes oxygen have more sufficient time to dissolve, effectively solves the problem that the oxygen utilization rate of traditional aeration is low.

The invention relates to the technical field of soilless culture, and particularly discloses a plant hydroponic device which comprises a box body with an opening in the top and a hydroponic box with an opening in the top, the hydroponic box is fixedly connected with the inner wall of the box body, and an oxygen supply opening is formed in the side wall of the box body; the cylindrical pipe is arranged in the water culture box, the oxygen supply mechanism is arranged in the cylindrical pipe, the side holes are formed in the water culture box, and the driving assembly is used for driving the cylindrical pipe to rotate. The cylindrical pipe is rotationally connected with the side hole; the oxygen supply mechanism comprises an oxygen supply pipe, an annular hollow pipe, a guide pipe, a movable pipe, a plurality of oxygen supply holes formed in the circumferential direction of the oxygen supply pipe, an oxygen through hole formed in the inner wall of the annular hollow pipe, an auxiliary hole formed in the cylindrical pipe and a power assembly used for driving the movable pipe to reciprocate in the length direction of the guide pipe. The problem that oxygen supply to roots of hydroponic plants is insufficient due to the fact that an existing hydroponic device cannot provide oxygen for the hydroponic plants in time is solved.

The invention discloses an artificial climate chamber building structure for modularized zoning regulation and control of crop growth, and relates to the technical field of artificial climate greenhouse equipment.According to the building structure, when crops are irradiated and grow, an illumination lamp can be isolated through heat insulation glass, so that the illumination lamp can normally irradiate the crops, and meanwhile, the illumination lamp can illuminate the crops; generated heat is isolated in the heat insulation glass, a large amount of heat is prevented from being released indoors, the stability of a temperature control system of the climate chamber is improved, the growth environment of crops is guaranteed, loss of a refrigerating system is reduced, and meanwhile the gradually-increased heat can be used for enabling the expansion air bag to expand. The air pump is used for recycling heat and conveying the heat into the climate chamber main body again, so that the energy consumption of the heating system can be reduced, and the energy loss of the climate chamber can be reduced.

The application belongs to the technical field of sporogon culture, and particularly relates to a culture method of sporogon of Brychus based on a liquid culture medium, which comprises the following steps: S1, preparing a Brychus sample with mature sporogon; S2, preparing a spore suspension, taking a mature sporangium of the Brychus and taking out spores, and dispersing the spores into distilled water to prepare a spore suspension; and S3, inoculation, inoculating the spore suspension into a culture bottle containing a liquid culture medium, and then culturing the culture bottle after being covered. The application customizes a special liquid culture medium formula according to the physiological characteristics and growth requirements of the sporogon of the Brychus, and matches highly adaptive culture environment parameters, and the two synergistically ensure the smooth culture of the sporogon of the Brychus from the two dimensions of nutrient supply and environment adaptation.

This invention discloses a digital light-processing 3D printing photocurable resin composition, its printing method, and its applications. The digital light-processing 3D printing photocurable resin composition includes a crosslinking agent, a monomer, a chain transfer agent, and a photoacid. By introducing a thioacetal compound as a chain transfer agent, this invention constructs a photoinitiated cationic degenerate chain transfer polymerization system under the action of a photoacid catalyst, achieving active / controllable regulation of the polymerization process. The photocurable resin composition provided by this invention has a simple composition, requires no complex synthetic reagents, and can fundamentally eliminate oxygen inhibition, achieving rapid and high-precision 3D printing with a maximum printing resolution of 57 μm.