61results about How to "Entry barrier" patented technology

The invention discloses a blocking agent for drilling fluid and a preparation method thereof. The blocking agent for the drilling fluid is prepared from a thermosensitive deformation hydrophobic material, a thermosetting hydrophobic material, a rigid solid particle material, vegetable oil and solvent oil. The preparation method comprises the steps that the mixture of the thermosetting hydrophobic material and the plant oil is added into the cooled thermosensitive deformation hydrophobic material, sufficient stirring is carried out, the rigid solid particle material and the solvent oil are added, and then sufficient stirring is carried out. The blocking agent can effectively block various holes and microcracks with the diameters smaller than 20 micrometers, the permeability of the holes and the microcracks is lowered from 10<-5> md to 10<-6> and even 10<-7> md, and the filter loss is reduced; the blocking agent is easy to disperse and suspend in the drilling fluid without agglomeration or sedimentation, contains no emulsifying agent, can be used in drilling fluid in a water station, can also be used in drilling fluid in an oil station, and has the blocking and anti-sloughing acting effects. The preparation method is easy and convenient to implement, low in cost and applicable to industrial large-scale production.

The invention discloses a method for preparing a high-voltage flexible lithium-ion battery with an electrophobic electrolyte carbon nanotube film, and relates to a preparation method for a flexible lithium-ion battery. The following steps are sequentially included: Step 1, carbon nanotube film nano-fluoride layer coating; Step 2, electrode preparation and assembly; Step 3, cell injection electrolyte solution. The present invention has the following beneficial effects: the present invention covers the surface of carbon nanotubes with a fluorinated layer of nanometer thickness to prevent lithium ions from entering the interior of carbon nanotubes, avoiding irreversible reactions with them, thereby improving the reversible capacity of the battery. And assembled into a full battery has good flexibility, and still maintains good electrochemical performance under severe deformation conditions such as folding and rubbing. The invention has simple preparation process, low production cost, and the preparation process is close to the industrialization level; the obtained flexible battery has high working voltage and strong battery life, which can be compared with traditional lithium ion batteries.

The invention relates to a grinding head structure of a grinder. The grinding head structure comprises an inner grinding head, an outer grinding head and an inner grinding head holder, wherein the inner grinding head and the outer grinding head are used for grinding seasoning cooperatively; the outer grinding head is of a cyclic structure with a through hole in the middle; the inner wall of the outer grinding head at one end is provided with a thread structure connected with a shell; the inner wall of the outer grinding head at the other end is provided with outer grinding teeth; inner grinding teeth matched with the outer grinding teeth are arranged on the outer wall of the inner grinding head; the inner grinding head is arranged in the through hole at one end, provided with the outer grinding teeth, of the outer grinding head; the inner grinding head is arranged on the inner grinding head holder; a cover plate is arranged at one end of the inner grinding head holder and is connected with the front end of the inner grinding head; a discharge port is arranged on the cover plate; the other end of the inner grinding head holder is rotationally clamped onto the outer wall of the outer grinding head; the inner grinding teeth and the outer grinding teeth are divided into two parts lengthwise along the direction from a feed port to the discharge port; and space width of three adjacent teeth of the inner grinding teeth and the outer grinding teeth near the feed port is equal to space width of four adjacent teeth of the inner grinding teeth and the outer grinding teeth near the discharge port.