7results about How to "Effective anchoring" patented technology

This invention provides an antistatic fabric based on modified acrylic fiber and its preparation process, belonging to the field of textile fabric technology. The process includes the following steps: first, preparing modified acrylic fiber and organosilicon quaternary ammonium salt modified CNW; then, mixing and stirring the modified acrylic fiber, DMF, and organosilicon quaternary ammonium salt modified CNW to obtain a spinning solution; mixing anhydrous ethanol and organosilicon quaternary ammonium salt modified CNW, and ultrasonically treating to obtain a dispersion; in a conjugate electrospinning device, feeding the spinning solution and dispersion into two sets of needles respectively, and electrospinning the spinning solution to form nanofibers under the action of a high-voltage electric field; feeding cotton yarn into the electric field region, causing the nanofibers to spirally wind around the surface of the cotton yarn and form a coating shell; and electrostatically spraying the dispersion to deposit the organosilicon quaternary ammonium salt modified CNW onto the surface of the coating shell; collecting and winding to obtain a fiber core-spun yarn, and weaving the fiber core-spun yarn to obtain the antistatic fabric. This invention can improve the antistatic performance of the fabric while also possessing certain antibacterial properties.

This utility model relates to the field of interventional tumor diagnostic and treatment medical device technology, and discloses an umbrella-shaped anchored tumor marker and its implantation system. The umbrella-shaped anchored tumor marker includes an umbrella-shaped anchoring system composed of multiple umbrella ribs with shape memory properties. The proximal ends of the ribs converge to form an axial central tube. The surface of the ribs has micro-barb structures formed by laser etching. The umbrella-shaped anchoring system remains in a contracted state at temperatures below body temperature and autonomously unfolds into a three-dimensional umbrella-shaped anchoring form at body temperature. In this utility model, the distal end of the umbrella ribs integrates a platinum-iridium alloy imaging tip with gradient stiffness (rigid at the proximal end and flexible at the distal end). The barbs are spaced along the length of the umbrella ribs. The shape memory alloy is in one state during delivery at room temperature and can self-unfold in vivo, achieving effective anchoring and imaging, thus aiding in tumor marking.

The application discloses a kind of Ce-La composite carrier load Cu-Ni bimetallic photo-thermal catalyst and its preparation method, for the defects of existing pure carrier oxygen vacancy concentration fixed, active metal is easy high-temperature agglomeration, catalytic activity and stability are insufficient, the Ce-La composite carrier is constructed by La doping modification in the application, and Cu-Ni bimetallic is formed 8Cu2Ni / aCebLa catalyst.La exists in the form of La-Ce-O solid solution, significantly improves the carrier oxygen vacancy concentration and activation capacity, while strengthening metal-carrier interaction, anchoring bimetallic particles to inhibit sintering, improve catalyst stability.

This invention relates to a C x N y This invention relates to a Pt@C fuel cell catalyst and its preparation method, belonging to the field of fuel cell catalyst technology. First, Pt@C is synthesized via a solvothermal reaction using ethylene glycol reduction. Then, it is mixed with a nitrogen-containing polymer material and cobalt chloride hexahydrate, and subjected to reduction in a reducing atmosphere, high-temperature treatment, carbon pyrolysis, and alloying to obtain porous nitrogen-containing carbon-coated Pt@C. x N y @PtCo / C catalyst. In the prepared catalyst, the porous coating layer significantly reduces the poisoning of catalyst particles by resin during fuel cell operation, improves cell activity, and extends cell life, exhibiting excellent activity and durability.

The utility model discloses a high pressure sand prevention hydraulic anchor for fracturing relates to hydraulic anchor technical field, the utility model discloses, including the anchor body, the surface of anchor body is opened with several groups of ladder hole, and the surface of anchor body and the opposite place of ladder hole is equipped with the mounting groove, the anchor claw is movably inserted in the ladder hole, the utility model discloses, through the sand prevention filter assembly of the slot in this anchor claw surface setting, can block the sand particle and enter the clearance between anchor claw and ladder hole, and then avoid the anchor claw to appear the jamming phenomenon when moving in the ladder hole, the anchor plate of mounting groove through screw fixed, anchor claw and anchor plate are movably inserted, and the spring between both can provide elastic force, so that when anchor claw can be withdrawn when no pressure or pressure reduces, realizes the anchor, and the rubber washer can enhance the sealing between anchor claw and ladder hole, guarantee the stability and reliability of anchoring, make the hydraulic anchor can effectively anchor the pipe column under the high pressure fracturing environment, prevent its displacement.

This invention provides a self-grown nitrogen-doped carbon nanotube composite material based on a MOF template. The composite material uses a cobalt salt as the metal center and an organic compound as the ligand to synthesize a metal-organic framework template, followed by the autocatalytic generation of nitrogen-doped carbon nanotubes under an inert atmosphere. The preparation method includes: first, preparing a MOF template using a cobalt salt and organic ligand; then, introducing a nickel source onto the template surface via a hydrothermal reaction to obtain a composite precursor; finally, using dicyandiamine as both a nitrogen and carbon source, stepwise calcining the composite precursor to allow in-situ growth of MOF-template-derived carbon nanotubes, simultaneously forming a Ni / Co2N alloy to obtain the composite material. The composite material of this invention possesses a stable structure and excellent catalytic activity. Using it as a cathode catalyst in lithium-air batteries can effectively reduce polarization during the charge-discharge reaction process, improve the battery's rate capability and cycle performance, and the preparation process is relatively simple, showing promising application prospects.

This invention relates to the field of admixtures for roller-compacted concrete (RCC), and particularly to a polycarboxylate composite water-reducing agent for RCC and its preparation method. The agent is prepared by copolymerization of the following raw materials in parts by weight: 30-50 parts polyether macromonomer, 1-20 parts modified hydrophobic unsaturated monomer C, and 1-30 parts unsaturated carboxylic acid. The modified hydrophobic unsaturated monomer C is prepared from unsaturated hydrophobic carboxylic acid ester monomers, emulsifiers, solubilizers, and water, with the mass ratio of the unsaturated hydrophobic carboxylic acid ester monomers, the emulsifier, the solubilizer, and the water being (3.0-5.5):(0.5-1.0):(0.5-1.5):(2.5-3.5). Through the aforementioned progressive and synergistic mechanism, this invention systematically solves multiple technical challenges related to water retention, construction adaptability, and long-term durability while ensuring a high water reduction rate for RCC, achieving comprehensive optimization of overall performance.