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

The invention relates to an industrial production method for semi-crystal poly(aromatic ether nitrile), which belongs to the field of polymer material. The method comprises the following steps: 2, 6-dichloro benzonitrile and hydroquinone are taken as raw materials; anhydrous potassium carbonate is taken as a catalyst; in the presence of a solvent and a dehydrating agent, the raw materials and the catalyst react under atmospheric pressure to obtain the poly(aromatic ether nitrile) homopolymer with low molecular weight and regular chain segments; and then the molecular weight of polymer is increased through pressurization, so as to obtain the semi-crystal poly(aromatic ether nitrile) polymer with high molecular weight. Due to the increase of crystallinity and molecular weight, the mechanical properties and heat resistance of the semi-crystal poly(aromatic ether nitrile) polymer are obviously improved.

The invention belongs to the technical field of polymer materials, and especially relates to a polyaryl ether nitrile resin and an industrialized synthetic method thereof. The structural unit of the polyaryl ether nitrile resin is one of units shown in the specification, and the crystallinity degree of the polyaryl ether nitrile resin is 28-38%. The polyaryl ether nitrile resin prepared by the invention is high in purity and high in crystallinity degree (28-38%); the glass transition temperature is 150-180 DEG C, the melting point is 310-355 DEG C, and the initial decomposition temperature is more than 450 DEG C; the resin has higher mechanical strength, the tensile strength is 100-120Mpa, the tensile modulus is 2.4-3.6GPa, and the bending strength is 100-140Mpa; and therefore, the polyaryl ether nitrile resin prepared by using the method disclosed by the invention can be applied to the fields such as aerospace, electronics, machinery, medical treatment, chemical engineering and the like.

The invention belongs to the field of high polymer materials, particularly relating to a poly (arylene ether nitrile) composite material and a preparation method thereof. The invention aims to solve the first technical problem of providing the poly (arylene ether nitrile) composite material with high performance and wear resistance. The poly (arylene ether nitrile) composite material of the invention comprises the following components in parts by weight: 40-70 parts of poly (arylene ether nitrile), 10-40 parts of filling, 3-10 parts of phthalocyanine prepolymer and 0-7 parts of anti-wear additive. The phthalocyanine prepolymer of the invention has the effect of plastification and improve the interface action between a resin system and fibers and between the resin system and the anti-wear additive, and the mechanical strength, abrasive resistance and abrasive resistance of the composite material.

The invention relates to the technical field of electromagnetic shielding, in particular to an electromagnetic wave shielding breathable porous carbon composite material and a preparation method and application thereof. The preparation method comprises the following steps: 1, enabling a wood block to be subjected to medium-temperature pre-carbonization and then subjected to high-temperature carbonization, and obtaining a carbonized wood block; (2) dipping the carbonized wood block in a Ni2+ solution, taking out the carbonized wood block and drying the carbonized wood block; (3) placing the carbonized wood block and dicyandiamide at an interval, introducing nitrogen, performing heating in different temperature zones, growing nitrogen-doped carbon nanotubes on the carbonized wood blocks adsorbed with Ni2+ in situ, and obtaining the nickel@nitrogen-doped carbon nanotube/carbonized wood composite material. The Ni@NCNT/CW composite material prepared by adopting the method is light magnetic porous carbon, nitrogen-doped carbon nanotubes grow in situ in the Ni-coated NCNT/CW composite material, the Ni-coated NCNT/CW composite material shows electromagnetic wave shielding performance with main absorption, and the porous structure endows the material with good air permeability, good gas circulation and excellent heat dissipation performance.

The invention relates to a preparation method for phytosterol acetate formed by catalytic synthesis through an enzymic method. The preparation method comprises the following steps: dissolving pyruvic acid and phytosterin as reaction substrates into dehydrated organic solvent; adding immobilized lipase and a dehydrating agent; and carrying out an oscillating reaction in a water bath of 40-60DEG C for 16-20 hours to obtain the phytosterol acetate, wherein the esterification rate is high as high as 93.01 percent. According to the preparation method disclosed by the invention, the phytosterol acetate is prepared from the pyruvic acid and the phytosterin as raw materials. The preparation method has the advantages of requirement on simple equipment, environment friendliness, safety and higher esterification rate.

The invention relates to the field of graphene quantum dots, in particular to a graphene quantum dot-based pesticide detection method. The method comprises the following steps of: a, preparing graphene quantum dots; and b, detecting the concentration of a pesticide by the quantum dots prepared in the step a. The preparation of the graphene quantum dots comprises the steps of: (1) mechanically mixing graphene blocks with a fused salt catalyst; (2) preheating the mixture in the step (1) and preserving the heat; (3) directly heating the heat preserved mixture in the step (2) and preserving the heat; (4) cooling the mixture in the step (3) to room temperature, and soaking the mixture in water to obtain suspension; and (5) carrying out centrifugal filtration on the suspension in the step (4) toobtain graphene quantum dots. The preparation method of the graphene quantum dots is low in cost, high in graphitization degree and good in finished product quality, so that the pesticide detection method is capable of accurately detecting the concentrations of pesticides and is suitable for large-scale production.

The invention relates to the field of furniture, in particular to an oak board color wiping system and a color wiping process. The oak board color wiping system comprises a loading device, a wood grain brushing device, a coloring device, a first color wiping device, a second color wiping device and an unloading device, and further comprises a conveying belt for conveying oak boards; and the conveying belt penetrates through the loading device, the wood grain brushing device, the first color wiping device, the second color wiping device and the unloading device in sequence. The oak board colorwiping system is high in working efficiency, uniform in color wiping and beautiful in furniture appearance.

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 relates to a fast and green method for preparing epoxidized soybean oil. After mixing soybean oil with a non-aqueous organic solvent, adding a heteropolyacid phase transfer catalyst and a surfactant polyethylene glycol, heating in a water bath, and reacting Hydrogen peroxide was added dropwise during the process. Separate the organic phase and distill under reduced pressure to obtain epoxidized soybean oil. The reaction time is 3.0-4.0h, the epoxidation value is greater than 6.30%, and the conversion rate is higher than 90%. In the present invention, by adding the surfactant polyethylene glycol, the production time is shortened, the process is simple, safe and non-toxic, the equipment is not damaged, the environment is friendly, and the product has high epoxidation value and conversion rate.

The invention discloses a low-chlorine environment-friendly snow melt agent without salt dust and a method for preparing the low-chlorine environment-friendly snow melt agent. The low-chlorine environment-friendly snow melt agent and the method have the advantages that the low-chlorine environment-friendly snow melt agent is in the shape of yellowish-brown particles, the particle size of the low-chlorine environment-friendly snow melt agent is 0.3-0.6 cm, the chlorine content of the low-chlorine environment-friendly snow melt agent is lower than the chlorine content of common snow melt agentsby 15% or above, environmental hazards of the low-chlorine environment-friendly snow melt agent can be reduced by 30%-40%, the low-chlorine environment-friendly snow melt agent contains little chloride, and accordingly destruction and pollution on soil, plants and underground water resources due to the low-chlorine environment-friendly snow melt agent are far lower than destruction and pollution due to the common snow melt agents; earth surfaces are free of white salt spots after snow removal operation is carried out, salt dust formation can be effectively inhibited, and secondary pollution can be prevented.

The invention relates to the field of graphene quantum dots, in particular to a preparation method of an ammonia electrochemical synthesis catalyst based on graphene quantum dots. The preparation method includes the steps of firstly, mechanically mixing graphite powder lumps and a fused-salt catalyst, wherein the fused-salt catalyst is the mixture of cesium carbonate fused salt and fused salt containing iron and molybdenum; secondly, subjecting the mixture obtained in the first step to thermal treatment and heat preservation; thirdly, directly heating the mixture obtained after the heat preservation in the second step, and performing heat preservation; fourthly, cooling the mixture obtained after the third step to room temperature, and soaking with water to obtain a suspension; fifthly, subjecting the suspension obtained in the fourth step to centrifugal filtering to obtain the ammonia electrochemical synthesis catalyst. The ammonia electrochemical synthesis catalyst is low in preparation cost, high in graphitization degree, good in quality, high in ammonia synthesis catalytic efficiency and applicable to large-scale production.