81results about How to "reduce surface tension" patented technology

Device and method for supercritical carbon dioxide high-pressure jet flow plug removal seepage enhancement

InactiveCN103867166Aincrease porosityreduce surface tension
The invention belongs to the technical field of oil-gas well yield increase equipment and relates to a device and method for supercritical carbon dioxide high-pressure jet flow plug removal seepage enhancement. An oil pipe is sleeved with a casing pipe, a packer is arranged between the casing pipe and the oil pipe, and an exploder is arranged in the oil pipe and connected with the oil pipe; a piston is arranged below the exploder and the portion between the piston and the exploder is filled with propellant; a cylinder sleeve is arranged at the lower end of the piston and the piston moves downwards in the cylinder sleeve; a flow guide connector is arranged on the lower portion of the cylinder sleeve; a nozzle is arranged on the flow guide connector and a rupture disk or an elastic body is arranged on the outlet portion of the nozzle; after the propellant is ignited by the exploder, energy is generated, so that the piston is pushed to compress supercritical carbon dioxide, short-time supercritical carbon dioxide jet flow waves generated through breakage of the rupture disk or popup of the elastic body enable rock to crack initially, and cracks are expanded through the pressure of short-time supercritical carbon dioxide jet flow with the low viscosity of the supercritical carbon dioxide. According to the device and method for supercritical carbon dioxide high-pressure jet flow plug removal seepage enhancement, the structure is simple, operation is convenient, raw materials are easy to obtain, cost is low, the energy use rate is high, and the device and method are environmentally friendly.

Method for enhancing biodegradation of hydrophobic methylbenzene

ActiveCN103816797Areduce surface tensionStrong surface and interfacial activity
The invention discloses a method for enhancing biodegradation of hydrophobic methylbenzene, and belongs to the field of volatile organic compound treatment technologies. The method comprises the following steps: adopting bacteria obtained by performing methylbenzene gradient domestication on activated sludge from a wastewater treatment plant; preparing a bacterium suspension for later use after enlarged cultivation; adopting expanded clay aggregate as a filler for a bio-trickling filter, and laying the filler layer by layer; spraying the bacterium suspension to the expanded clay aggregate uniformly from the upper part of the bio-trickling filter; feeding high-concentration methylbenzene gas from the bottom of the bio-trickling filter for further domestication; starting the bio-trickling filter in a gas-phase domestication biofilm-culturing manner, forming biofilms, and enabling the bio-trickling filter to enter the next stable operation stage; adding rhamnolipid, a biosurfactant, to a circulating nutrient solution; spraying the circulating nutrient solution to the filler from the upper part of the bio-trickling filter to allow the rhamnolipid to distribute uniformly on the filler along with the circulating nutrient solution through a liquid distribution board; feeding waste methylbenzene gas to be treated from the bottom of the bio-trickling filter. The method has the advantages that the operation is simple, no secondary pollution is generated, and the biodegradation efficiency of hydrophobic methylbenzene, a VOC (Volatile Organic Compound), can be increased.

Ink for glass impact resistance and use method of ink

InactiveCN108504184Areduce surface tensionRepair minor scratches
The invention relates to the technical field of ink, in particular to ink for glass impact resistance. The ink for the glass impact resistance is prepared from the following raw materials in parts byweight: 1 to 5 parts of 184 photoinitiator, 25 to 40 parts of organosilicon-modified acrylate, 1 to 5 parts of vinyl coupling agent, 2 to 5 parts of epoxy coupling agent, 15 to 30 parts of silanol resin, 15 to 30 parts of tetra-functional polyurethane acrylate and 15 to 40 parts of solvent; a use method of the ink comprises the following steps: respectively adding 5 to 10 parts by weight of curingagent and 75 to 150 parts by weight of solvent into the ink for mixing and preparing to obtain mixed ink of which the ratio of oil to the curing agent to the solvent is 15 to 1 to 5; putting the inkinto an automatic air spray gun and spraying needed glass to enable the thickness of the ink on the glass to be 10 to 15mu m; putting the glass in an 60 DEG C environment and carrying out low-temperature baking for 3 to 5 minutes; then carrying out ultraviolet curing on the glass; putting the glass in an environment of which the temperature is greater than 25 DEG C for 24 hours. The impact resistance of the glass is improved; in addition, the ink is simple and convenient to use and facilitates promotion and implementation.

Environmentally-friendly recycled paper and preparation method thereof

The invention relates to an environmentally-friendly recycled paper and a preparation method thereof, which belong to the technical field of paper making. The method uses waste paper as a raw materialto synthesize two hydrophilic group surfactants, the surface tension is reduced, and steps of penetration, emulsification and dispersion are carried out on an ink, thereby removing, the whiteness ofthe waste paper is improved, and the recycled paper can be re-printed and reused; an active methylene hyperbranched waste paper formaldehyde-removal additive is prepared by taking ethyl acetoacetate and hydroxyl terminated hyperbranched polyester as raw materials, so that the formaldehyde can be captured and removed; dicyandiamide and hexanediamine dihydrochloride are taken as raw materials, ciprofloxacin is added for clathration as an antibacterial agent, the irritation is reduced, the utilization is increased and the action time is prolonged, the antibacterial property of recycled paper is increased, and mildew can be prevented; a silica sol is used as a raw material, and by compounding with calcium carbonate and bentonite, the mechanical properties of recycled paper and the tear resistance can be improved. The environmentally-friendly recycled paper solves the problems of high formaldehyde content and poor water resistance of waste paper at present.

Hexafluoropropylene-based quaternary ammonium salt cationic surfactant, synthesizing method and use

The invention relates to a cationic surfactant, in particular to the cationic surfactant of perfluoro propylene based quaternary ammonium salt, synthesis thereof and application thereof. The structural formula of the compound is as shown in a figure. The synthesis of the cationic surfactant comprises the following steps: 1. performing a single amidation reaction between perfluoro fatty group carboxylic acid and an alkyl diamine compound under the protection of nitrogen to generate perfluoro fatty group amide; and 2. performing a quaternary ammonium salinization reaction between the perfluoro fatty group amide and a 3-(halogen) propylene. Compared with the prior surfactant art and functions, the cationic surfactant has a further development. With a special structure containing a double-bond, the cationic surfactant has all the surface activities of a common fluorocarbon surfactant and reactivity. The finished product has good water solubility of, has foaming characteristics, can be mixed and dissolved with various solvents, and shows cation type in various media. The cationic surfactant can not only reduce the surface tension of a system, but also polymerize monomers, and have hydrophobicity and oleophobic property. Besides, the method is simple and easy to control, has high yield, can be applied in various fields and is suitable for industrialization.

Silicon dioxide-based anti-adhesion agent used for polyolefin thin film and preparation method thereof

The invention relates to a silicon dioxide-based anti-adhesion agent used for a polyolefin thin film and a preparation method thereof. The silicon dioxide-based anti-adhesion agent is suitable for plastic thin film production enterprises. The preparation method includes the following steps of: 1) preparing silicon dioxide sol from tetraethyl orthosilicate under alkaline conditions; 2) adding a surfactant and a proper oil phase organic substance, and stirring the mixture to prepare a micelle with silicon dioxide as a shell layer; 3) adding trimethoxy silane containing an R group and a catalyst to the micelle with the silicon dioxide as the shell layer, and stirring the mixture to prepare silicon dioxide-based microspheres at a certain temperature, wherein the surfaces of silicon dioxide are modified by silane; and 4) drying the microspheres to remove the oil phase to obtain silicon dioxide hollow microspheres. The silicon dioxide-based anti-adhesion agent is a compound having definite structural and molecular formulas and molecular weight, but is a hollow microsphere which has a hierarchical pore structure and is based on silicon dioxide. The anti-adhesion agent can reinforce a plastic thin film and improves creep resistance, wherein a large quantity of micro projections and gaps are formed on the surface of the thin film, thereby increasing roughness of the thin film, reducing friction coefficient and preventing adhesion of the thin films.
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