Nanjing University of Technology

www.njtech.edu.cn
Nanjing, China

Nanjing Tech University , colloquially known as Nan Gong Da , is a university located in Nanjing, Jiangsu Province, China. The university specializes in engineering. English language courses are compulsory. Wikipedia.

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This invention relates to SiC porous ceramic material and its preparation method and belongs to the porous ceramic material preparation field. SiC aggregate, sintering additive zirconia, pore-forming agent activated carbon, polymer adhesives and reinforcing agent SiC whiskers are mixed together by a certain ratio. After the mixture is molded, dried and sintered, a type of porous ceramic material can be prepared. The porous ceramic material prepared by the invention has high strength, high porosity, good thermal shock resistance, low sintering temperature and other advantages. It can be used as the high-temperature flue gas filtration material and the carrier material for vehicle exhaust gas purification.


A method to prepare functional polyester polyols by using micro-reaction device, wherein mixing -caprolactone/-valerolactone monomer with mercapto alcohol evenly with appropriate organic solution under moistureless conditions, and continuously transferring the prepared mixing solution into a micro-reaction device supported with an immobilized enzyme for polymerization to synthetize a poly (-caprolactone/-valerolactone). Compared with the prior art, the present invention achieves a continuous production by using immobilized lipase Novozyme435 as a catalyst.


Patent
Nanjing University of Technology | Date: 2016-01-13

A portable rapid detection device for heavy metal ions includes a card electrode and a thin-layer flow cell, wherein a three-electrode system of the card electrode is inserted in a micro-channel of the thin-layer flow cell; and heavy metal ions are detected by using an anodic stripping voltammetry (ASV), a solution to be detected flows by the surface of a working electrode in the micro-channel, and heavy metals are enriched and stripped on the surface thereof.


Patent
Nanjing University of Technology | Date: 2016-11-30

It relates to the field of synthetic macromolecular chemistry, and discloses a method for one-step synthesis of thiol-functionalized polyester polyols by organic catalysis. This method uses lactone monomer as reaction raw material, thiol-alcohol as initiator, and diphenyl phosphate as organic catalyst to catalyze and synthesize the thiol-functionalized polyester polyols. The present invention provides a method which is simple, inexpensive, easily controllable and environmentally friendly to prepare thiol-functionalized polyester polyols with the easily available and controllable catalyst. The method can selectively catalyze the ring opening polymerization of lactone to prepare thiol-functionalized polyester polyols using the organic catalyst.


Patent
Nanjing University of Technology | Date: 2016-11-30

A method for preparing polyesteramides by organocatalysis. The polyesteramides are prepared by a ring-opening polymerization reaction of comonomer under the action of an activator and an initiator, with -caprolactone and -caprolactam taken as the comonomer, and an I type carbene carboxylate compound or an L type carbene carboxylate compound taken as catalysts.


Patent
Nanjing University of Technology | Date: 2014-09-12

The present invention relaters to a method for continuously preparing a nano zinc oxide with a membrane reactor. A zinc salt solution and a precipitator solution required for the preparation of a zinc oxide are respectively used as dispersion phases, and under the action of a certain pressure, the two reaction solutions respectively penetrate through a membrane tube at a certain rate and disperse quickly under the action of a shear force and react, producing a precursor precipitate. A precursor suspension penetrates through the membrane tube continuously and circularly after being pressurized by a pump, and at the same time, deionized water as a washing fluid is added to a suspension storage tank, wherein impurity ions penetrate through membrane pores and are discharged along with the liquid medium; after the concentration of the impurity ions meets requirements, the concentrated solution is discharged continuously and then spray-dried to obtain a basic zinc carbonate precursor powder. The basic zinc carbonate powder is calcined under certain conditions to obtain the nanostructured zinc oxide powder. The continuous preparation and washing of a powder can be achieved by coupling a membrane washing technique with a membrane dispersion technique. The procedure is simple, the structure of zinc oxide is easy to control and the yield is high.


Patent
Nanjing University and Nanjing University of Technology | Date: 2014-10-16

The present invention discloses a device for Fenton fluidized-bed process and a method applying the device for wastewater treatment. It belongs to the wastewater treatment field. The device comprises an adjusting tank, a lift pump and a main reaction column. The adjusting tank is connected to a water distributing trough on the top of the main reaction column through the lift pump; the main reaction column is filled with the packing material, and below the packing material is equipped with an obcone, whereon a plurality of inlets are provided and a slag discharge pipe is connected to the bottom; above the packing material is installed an inclined plate, above which and at the upper end of the main reaction column are arranged with a partitioned trough and an outflow trough; the partitioned trough is evenly divided by a vertical plate into two independent chambers; the upper end of each chamber is connected to the water distributing trough while the lower end of each chamber is designed with an outlet; the outlets of the two independent chambers are connected to the inlets on the obcone through the first circulation pump and the second circulation pump respectively; the outflow trough is installed opposite the partitioned trough. When being used to treat biotreated wastewater, the device disclosed in the present invention can enhance use efficiency of the reagent, and maintain high effect and stability in eliminating iron in the wastewater.


Patent
Nanjing University of Technology | Date: 2015-07-20

Disclosed is a method for manufacturing a vertically-growing open carbon nanotube thin film. The method comprises: grinding the surface of a ceramic film by using metallographical sandpaper, performing ultrasonic cleaning by using acetone and performing boiling with water, and performing drying to obtain a ceramic film substrate; dissolving a catalyst ferrocene in a carbon source dimethylbenzene in an ultrasonic manner, and adding a carbon nanotube growth promoting agent thiophene to form a mixed solution; putting the ceramic film substrate in a tubular furnace reactor, introducing nitrogen, and slowly injecting the mixed solution at a constant speed to perform a high-temperature vapor deposition reaction; and further performing plasma etching and nitric acid reflux heating treatment to open closed ends of carbon nanotubes, and removing catalyst particles on the carbon nanotube thin film to obtain the open carbon nanotube thin film that is highly vertically aligned. The process of the present invention is simple, practical and low in cost, and the density and the shape of the carbon nanotube thin film can be controlled by changing condition parameters. The prepared carbon nanotube thin film can be widely applied in the fields of gas purification and storage, heat conduction, electric conduction, catalyst carriers and the like, and has good application prospects.


Patent
Nanjing University of Technology | Date: 2016-05-19

It discloses a chemical regeneration method of oxidized coenzyme NAD(P)^(+) which is under an oxygen or air atmosphere condition, adding a catalytic amount of bridged flavin, and oxidizing NAD(P)H to obtain NAD(P)^(+). The catalyst for regeneration of cofactor is cheap and easily available small organic molecule having no noble metal; this regeneration system can regenerate NADH and NADPH; this regeneration system has a wide pH range and temperature range, being applicable to various oxidation reactions catalyzed by nicotinamide-dependent oxidoreductase.


Patent
Nanjing University of Technology | Date: 2017-10-11

This invention discloses a method for preparing polyesteramides by organocatalysis. The polyesteramides are prepared by a ring-opening polymerization reaction of comonomer under the action of an activator and an initiator, with -caprolactone and -caprolactam taken as the comonomer, and an I type carbene carboxylate compound or an L type carbene carboxylate compound taken as catalysts. Compared with the prior art, the method for preparing polyesteramides takes carbene as the catalyst and -caprolactone and -caprolactam as the reaction monomer, therefore, the total yield can reach 91.2%-97.1%, and degradable polyesteramide copolymers with different melting points (Tm) within 50-200C can be prepared by adjusting the ratio of raw materials in a formula. At the same time, by the tensile test performed at a room temperature of 15 C, the humidity of 50% and the speed of 200 mm/min, the hot pressed die sheet, which is 1.00 mm thick and 6.00mm wide, and made of the polyesteramides prepared by the method, has the tensile strength between 10 MPa and 60 MPa, and the Youngs modulus between 0.1 GPa and 2 GPa.

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