42 results about "Microbial adhesion" patented technology

Disclosed are implantable or insertable medical devices that provide resistance to microbial growth on and in the environment of the device and resistance to microbial adhesion and biofilm formation on the device. In particular, the invention discloses implantable or insertable medical devices that comprise at least one biocompatible matrix polymer region, an antimicrobial agent for providing resistance to microbial growth and a microbial adhesion / biofilm synthesis inhibitor for inhibiting the attachment of microbes and the synthesis and accumulation of biofilm on the surface of the medical device. Also disclosed are methods of manufacturing such devices under conditions that substantially prevent preferential partitioning of any of said bioactive agents to a surface of the biocompatible matrix polymer and substantially prevent chemical modification of said bioactive agents

Oral care and other compositions comprising particles having cores attached to bioadhesive polymers for inhibition of pellicle formation, plaque formation, biofilm formation, biofouling, and microbial adhesion or attachment are described. Methods using said compositions to treat surfaces, such as oral surfaces.

Antimicrobial compositions and methods for depositing or coating the antimicrobial or antibacterial compositions on a substrate to prevent microbial adhesion are provided. The antimicrobial composition may include a cationic polymer having a poly-allylamine backbone. A portion of the poly-allylamine backbone may be functionalized with at least one of a guanidine functional group and a biguanide functional group.

The invention discloses a biochemical pool microbial adhesion cleaning device which comprises cleaning rollers. The two ends of the cleaning rollers are installed on installation seats which are located at the upper and lower ends of a shell body in a matched mode by bearing pairs. Input shafts of the cleaning rollers are connected with an output shaft of a speed changing box. An input shaft of the speed changing box is connected with an output shaft of a motor. The motor is fixedly installed on the speed changing box, and the speed changing box is fixedly installed on the shell body. Brushesare installed outside the cleaning rollers in a sleeving mode, and spray heads are fixedly arranged at shell surfaces of the two sides of the cleaning rollers. Inlets of the spray heads communicate with an outlet of a water pump by pipes. The water pump is fixedly installed on the back portion of the shell body, and a protective cover is fixedly installed at the outer of the water pump. Accordingto the biochemical pool microbial adhesion cleaning device, underwater operations can be directly carried out with no influence on the normal working of a biochemical pool, no personnel is required toenter the biochemical pool, and meanwhile, the cleaning effect is good.

The invention provides an ethylene-chlorotrifluoroethylene copolymer, which is at least composed of ethylene, chlorotrifluoroethylene, CF3-CX=CY2 (X, Y are independently selected from H, F, Cl or Br) and R-O- CH=CH2 (R is selected from C2-C16 straight-chain alkyl, branched-chain alkyl, cycloalkyl or C2-C16 straight-chain alkyl, branched-chain alkyl, cycloalkyl substituted by Cl, Br) four Copolymerized monomers. The invention also provides a preparation method of the ethylene-chlorotrifluoroethylene copolymer. The prepared ethylene-chlorotrifluoroethylene copolymer is suitable for anti-corrosion and / or protection against microbial adhesion equipment.

Disclosed is a polyurea coating acting against ocean engineering corrosion. The polyurea coating comprises a component A and a component B, wherein the component A comprises a polyisocyanate and a polycarbonate polyol, and the component B comprises an amine-terminated polyether, an amino chain extender, a modified nano titanium dioxide, a nanometer zinc oxide, a hydroxyamino carboxylic acid compound, an anti-foulant, an anti-rust pigment and an anti-settling agent. The raw materials for preparing the modified nano titanium dioxide comprises nano titanium dioxide, a surfactant, a silane coupling agent, silver nitrate and copper sulfate. The polyurea coating has a strong seawater and salt fog resistance, can resist microbial adhesion, and is suitable for acting against marine engineering corrosion.

The invention discloses a carbon fiber composite propeller for ships, which includes a metal hub and four carbon fiber composite blades installed on the metal hub, and the metal hub and the carbon fiber composite blades are assembled through installation card slots and installation protrusions. An adhesive layer is added to make the two fixedly connected; the carbon fiber composite blade is composed of a preform and a resin matrix. The carbon fiber composite propeller prepared by the invention has the characteristics of high dimensional accuracy, high strength, good rigidity, light weight, low noise, corrosion resistance and anti-microbial adhesion, etc., and has good fatigue performance and impact resistance.

A multi-media self-degrading sewage treatment device, comprising a device cavity, the device cavity is divided into three parts by the cavity, which are respectively a pre-treatment area, an aeration treatment area and an advanced treatment area; the device cavity There is a water inlet on one side of the body, and a water outlet on the bottom of the other side; the water inlet is located at the pre-treatment area; the lower part of the cavity partition is provided with water inlet through holes; the pre-treatment area A tray is arranged horizontally inside; a porous medium with pre-filtering effect is placed in the tray; the aeration treatment area is composed of three chambers, namely a micro-aeration chamber, an aeration chamber and a buffer chamber. The invention adopts new environment-friendly materials as the shell and main frame, realizes the effect of natural degradation, and adds multi-media microbial attachment materials in the device to achieve the purpose of sewage treatment integrating physics, chemistry and biology.

The invention discloses a carbon fiber elbow used for ships, which includes an elbow body and threaded sleeves arranged in two ports of the elbow body, the threaded sleeves are made of polytetrafluoroethylene, and the elbow body is cured by a resin matrix production. When used, this kind of carbon fiber elbow for ships has significant advantages such as high strength, good rigidity, light weight, corrosion resistance and anti-microbial adhesion, smooth inner surface and no scaling, and has good fatigue performance and impact resistance. .