3results about How to "Modulated release rate" patented technology

The invention relates to the field of warm-keeping fabrics, and particularly discloses an antibacterial warm-keeping composite fabric and a preparation method thereof. The antibacterial warm-keeping composite fabric comprises an outer-layer fabric and a filling material, the outer-layer fabric comprises nano-silver composite cotton fibers and polyester fibers, and the filling material comprises down feather; the preparation method comprises the following steps: carrying out mixed spinning on 70-75% of nano-silver composite cotton fibers and 25-30% of polyester fibers to obtain blended yarns, preparing the blended yarns into an outer-layer fabric through a knitting machine, and carrying out heat setting on the outer-layer fabric after weaving is completed; the outer-layer fabric is flatly laid, the filler is evenly distributed on the outer-layer fabric, then a layer of outer-layer fabric is flatly laid on the surface of the filler, lamination is conducted in a hot-pressing mode, and the antibacterial warm-keeping composite fabric is obtained. The antibacterial warm-keeping composite fabric has the advantage of simultaneously meeting the double requirements of consumers on warm keeping and antibacterial of clothes.

The invention relates to the field of concrete and oil-gas field development well cementation, in particular to a preparation method, a product and application of a pH-responsive slow-release early strength agent. The preparation method of the pH-responsive slow-release early strength agent comprises the following steps: carrying out pore expansion treatment on porous silicate minerals, adding the pore-expanded silicate minerals into an inorganic salt solution, and carrying out vacuumizing-vacuumizing operation to obtain loaded silicate minerals; adding the loaded silicate mineral into a cationic polyelectrolyte solution for coating to obtain a silicate mineral A; and adding the silicate mineral A into the anionic polyelectrolyte solution for film coating, and repeating the steps of film coating in the cationic polyelectrolyte solution and film coating in the anionic polyelectrolyte solution. The pH response slow-release early strength agent has alkali response behavior, can improve the early strength of set cement, has no negative influence on the thickening performance, and overcomes the defects of the existing early strength agent for deepwater well cementation.

The application relates to the technical field of zinc oxide materials, and discloses zinc-based isomeric zinc oxide as well as a preparation method and application thereof. The zinc-based isomeric zinc oxide is used for ship antifouling paint, and the zinc-based isomeric zinc oxide comprises a crystal nucleus layer, the chemical general formula of the crystal nucleus layer is: [(ZnO) x (Si a , Mg b , Zn c , Ni d )Al2O 4z ] y , x=0.5-1.2, a=0.1-0.3, b=0.05-0.15, c=0.2-0.4, d=0.02-0.08, z=0.8-1.2, and y=0.9-1.1. The zinc-based isomeric zinc oxide contains zinc oxide phases and zinc-based spinel solid solution phases, the two phases form low-energy coherent interfaces through interface reconstruction, the release rate of zinc ions can be controlled, marine toxicity caused by explosive release can be avoided, marine organism adhesion can be reduced, the powdering degree of the antifouling paint coating can be reduced, and the corrosion current density can be reduced, and therefore the zinc-based isomeric zinc oxide is suitable for environmentally-friendly ship antifouling paint.