35results about How to "Production conditions are easy to achieve" patented technology

The invention relates to a solid lubricant glycan derivative for a drilling fluid. Raw materials of the derivative comprise, 30-40 parts of hydroxypropyl guanidine gum, 3-4 parts of propylene epoxide,0.1-0.15 part of sodium hydroxide, 20-30 parts of dodecyl alcohol, 0.15-0.2 part of a catalyst, 10-20 parts of white oil, 2-5 parts of a surfactant, 0.1-2 parts of an antifoaming agent, 10-20 parts of mica powder, 1-3 parts of a bactericide, 6-10 parts of ethanol and 10-25 parts of water. A preparation method includes the steps that the hydroxypropyl guanidine gum, the sodium hydroxide and the water are added into a reaction still and stirred continuously, and the propylene epoxide is added for stirring, refluxing and a reaction; a reaction solution is heated, the catalyst is added, and a mixed solution of the ethanol and the dodecyl alcohol is added under stirring for a reaction; the reaction material solution is cooled to the room temperature, the white oil, the surfactant, the antifoaming agent, the mica powder and the bactericide are added, stirred uniformly, dried and ground into powder, and then the derivative is obtained. The lubricating coefficient reduction rate is higher than or equal to 90%, the derivative has good high-temperature drop reduction performance and salt resistance, the preparation conditions are easily achieved, and the derivative is environmentally friendly.

The invention relates to the field of graphene quantum dots, in particular to a solution acidity-alkalinity regulating method based on a graphene quantum dot. The solution acidity-alkalinity regulating method comprises the following steps: a, preparing the graphene quantum dot; and b, regulating the solution acidity-alkalinity under illumination by the graphene quantum dot prepared in step a. Thegraphene quantum dot is prepared by adopting the following steps: 1, mechanically mixing a graphite powder lump with a molten salt catalyst; 2, performing preheating treatment on the mixture obtainedin step 1 and preserving heat; 3, directly heating the mixture after heat preservation in step 2 and preserving heat; 4, after cooling the mixture obtained in step 3 to the room temperature, performing water soaking treatment to obtain a suspension liquid; and 5, performing centrifugal filtration on the suspension liquid obtained in step 4 to obtain a graphene quantum dot product. The preparationmethod for the graphene quantum dot in a pesticide detection method is low in cost, high in degree of graphitization, and high in finished product quality, and therefore, the solution acidity-alkalinity can be effectively regulated, and the graphene quantum dot is suitable for large-scale production.

The invention relates to the field of graphene quantum dots, and particularly relates to a graphene quantum dot and a preparation method thereof. The preparation method of the graphene quantum dot comprises the following steps: (1), taking a graphite powder block to mechanically mix with a molten salt catalyst; (2), taking a mixed material in the step (1) to carry out preheating treatment and heatpreservation; (3), taking the mixed material subjected to the heat preservation in the step (2) to directly heat up and carry out the heat preservation; (4), cooling the mixed material in the step (3) to the room temperature, and then carrying out water immersion treatment to obtain suspension liquid; and (5), taking suspension liquid in the step (4), and carrying out centrifugal filtration to obtain a graphene quantum dot product. The preparation method of the graphene quantum dot, which is provided by the invention, has the advantages of low manufacturing cost, high graphitization degree, and good finished-product quality, and is applicable to large-scale production.

The invention belongs to the field of polymeric nanocomposites and specifically relates to a poly(aryl ether nitrile) composite material and its preparation method. A first technical problem to be solved in the invention is to provide the poly(aryl ether nitrile) composite material with good mechanical strength and wear resistance. The poly(aryl ether nitrile) composite material is prepared by adding graphene microchips into poly(aryl ether nitrile) resin, wherein, the addition amount of the graphene microchips is no more than 10% of the weight of the poly(aryl ether nitrile) composite material. The poly(aryl ether nitrile) composite material prepared in the invention has excellent comprehensive performance: a tensile strength the material is 80 to 120 MPa, elongation at break is 8 to 25%, a flexural strength is 120 to 170 MPa, a flexural modulus is 3200 to 4400 MPa, an impact strength is 6 to14 J / m<2>, the coefficient of friction is 0.3 to 0.5, and resistance to a high temperature as high as 500 DEG C is obtained; the composite material not only has substantially improved mechanical properties and wear resistance but also reduces application cost of poly(aryl ether nitrile) products.

The invention discloses an aromatic nitrile-based special resin containing a benzoxazine ring and an industrial preparation method thereof. It is obtained by pre-opening the aromatic nitrile-based special resin containing a benzoxazine ring in a solvent, and then co-polymerizing it with a benzoxazine resin of the corresponding structure; wherein: the aromatic nitrile group containing a benzoxazine ring Special resin: 50-95 parts; benzoxazine resin: 5-50 parts; solvent: 100-300 parts. The invention adopts solvent copolymerization reaction at normal pressure, the production conditions are easy to realize, and the production process is easy to control. The aromatic nitrile-based special resin containing benzoxazine ring is used for copolymerization with benzoxazine resin, and both resins contain benzoxazine. ring, compatible in molecular structure, to obtain aromatic nitrile-based special resin and benzoxazine resin copolymer resin containing benzoxazine ring, integrating the excellent performance of aromatic nitrile-based special resin and the excellent processing performance of benzoxazine resin In one; after the copolymerization, the solvent can be recycled, which is safe and environmentally friendly.