6results about How to "Self-cleaning" patented technology

The application discloses a preparation method of an anti-algae-adhesion super-hydrophobic composite coating. The method comprises the following steps: uniformly dispersing epoxy resin into ester substances to obtain a mixed solution A; adding polyhexamethylene guanidine hydrochloride, polyvinylpyrrolidone, nano-TiO2, polytetrafluoroethylene micro powder, graphene oxide and gamma-aminopropyl triethoxysilane into the mixed solution A, uniformly mixing to obtain a mixed solution B; adding fluorine-containing silane and polyether amine curing agent into the mixed solution B, uniformly dispersing to obtain a mixed solution C; and spraying the mixed solution C to a substrate surface, and performing normal-temperature ventilation and drying to obtain the super-hydrophobic composite coating. The super-hydrophobic coating prepared by the method has the characteristics of low contact area with water, low viscous force and self-cleaning, and also has good anti-algae-adhesion performance, and has a wide application prospect in marine antifouling.

The invention relates to the technical field of membrane manufacturing, in particular to a corrosion-resistant hydrophobic PDMS (Polydimethylsiloxane)-HUSKT-1 membrane as well as a preparation method and application thereof. The PDMS / HKUST-1 composite hydrophobic membrane is constructed on the foamed nickel substrate by combining dopamine modification and a one-step impregnation technology, and the bottleneck of environmental tolerance of a traditional separation membrane is broken through. By means of the efficient separation mechanism and the self-cleaning characteristic under gravity driving, energy consumption and pollution risks are remarkably reduced, a solution with high selectivity, high durability and engineering potential is provided for industrial oil-containing wastewater treatment and marine oil spill recovery, and the key challenge that efficiency, stability and cost are difficult to collaboratively optimize in the prior art is solved.

This invention belongs to the field of micro-coating protection and discloses an organosilicon aerosol coating for waterproofing precision instruments and its preparation method. The organosilicon aerosol coating comprises, by weight, 4-6 parts of fluorinated organosilicon, 2-3 parts of organosilicon-acrylate resin, 30-40 parts of a first solvent, 20-30 parts of a second solvent, 1-1.5 parts of a release agent, 0.5-1 parts of a leveling agent, and a certain amount of propellant. This invention uses a first solvent and a second solvent with different volatility properties to improve the self-leveling and film-forming quality of the microfilm after spraying, reducing surface micropore defects caused by excessive evaporation and forming a good waterproof layer. Through the synergistic effect of fluorinated organosilicon and organosilicon-acrylate resin as film-forming materials, the waterproof coating formed with the release agent and leveling agent possesses both long-lasting waterproofing and peelability. When used for the protection of precision instruments, the coating can be peeled off after a certain protection period without leaving residual pollution on the instrument surface.

The invention relates to the technical field of liquid level measurement, in particular to an underground water level monitoring device and method.The monitoring device comprises a probe assembly and a displayer, the probe assembly comprises a liquid level pipe, a water inlet head and a pressure diaphragm, the pressure diaphragm serves as a mechanical sensor and can detect water pressure signals, and the water inlet head is rotationally installed at one end of the liquid level pipe; the liquid level pipe is provided with a driving motor to drive the water inlet head to rotate, a first liquid hole and a second liquid hole are formed in the water inlet head, one end of the first liquid hole and one end of the second liquid hole are located in the outer wall of the water inlet head, and the other end of the first liquid hole and the other end of the second liquid hole are located in the end face, facing the pressure diaphragm, of the water inlet head. A flow deflector is arranged on the end face, facing the pressure diaphragm, of the water inlet head, and when the driving motor drives the water inlet head to rotate, underground water flows towards the pressure diaphragm through the first liquid hole or the second liquid hole and flushes the pressure diaphragm. The technical problem that the monitoring precision is affected by impurities on the surface of the pressure diaphragm in the prior art is solved.

The application belongs to the technical field of super-hydrophilic / super-oleophilic coating materials, and discloses a super-amphiphilic surface with high light transmittance and a preparation method thereof, which comprises the following steps: pretreating a surface of a base material by strong cleaning; immersing the pretreated surface of the base material in prepared strong acid and strong alkali solutions respectively to perform strong acid and strong alkali treatment, and cleaning after immersion for a proper time; and immersing the surface of the base material in concentrated nitric acid at room temperature to perform passivation treatment after the super-amphiphilic performance of the surface of the base material is completed. The application realizes the super-hydrophilic and super-oleophilic performance of the surface of the base material through a simple technological process, and the water and oil can be completely spread on the surface and have self-cleaning performance. In particular, when the glass material is used as the surface of the base material, the high light transmittance of the glass surface can be effectively realized to reach more than 95%.

The invention relates to the technical field of glazes, and discloses a composite enhanced antibacterial ceramic glaze and a preparation method thereof.The ceramic glaze is prepared from bentonite, potassium feldspar, kaolinite, calcite, quartz, lithium feldspar, mullite, a synergistic antibacterial agent and the like through grinding and mixing, and in the high-temperature ablation process of the glaze, the ceramic glaze is subjected to high-temperature ablation, so that the antibacterial ceramic glaze is obtained. A carrier of the synergistic antibacterial agent can be ablated to form zinc oxide and silica sol, so that silver can be protected, silver can continuously exist in a finally formed glaze layer to play an antibacterial role, meanwhile, zinc oxide has good performance, and silver and zinc oxide cooperate with each other to generate an enhanced antibacterial role, so that the purpose of improving the antibacterial effect by adding a small amount of silver and silica sol is achieved. The glaze layer can be endowed with excellent antibacterial performance. In addition, due to the existence of the silica sol, the surface of the glaze layer is super-hydrophobic, so that the glaze layer has self-cleaning performance.