公开(公告)号：US20250153113A1

公开(公告)日：2025-05-15

申请号：US19026585

申请日：2025-01-17

Applicant: NANJING TECH UNIVERSITY

Inventor： Zhaoxiang ZHONG ,  Shiying NI ,  Dong ZOU ,  Yanmin GONG ,  Weihong XING

IPC: B01D67/00 ,  B01D39/20 ,  B01D71/02 ,  C04B35/624 ,  C04B35/626 ,  C04B35/634 ,  C04B35/64 ,  C04B35/82

Abstract: A method for preparing a ceramic fiber filter tube with high air permeability, including: using mullite short fibers as aggregates, adding glass fibers and silica sol as sintering aids, obtaining a ceramic fiber filter tube green body by using a filterer-pressing forming process, and obtaining the ceramic fiber filter tube with high air permeability by freeze-drying and heat treatment in turn. The combination of two sintering aids with different properties can effectively improve the performance of ceramic fiber filter tube prepared by a wet forming technology. At the same time, the freeze-drying treatment can block the migration path of nanoparticles in the silica sol to the surface of the ceramic fiber filter tube due to the capillary force, so that the properties of the prepared ceramic fiber filter tube are more uniform, providing a reference for the preparation of a ceramic fiber membrane with high flux.

公开(公告)号：US20170113933A1

公开(公告)日：2017-04-27

申请号：US15317123

申请日：2015-07-20

Applicant: NANJING TECH UNIVERSITY

Inventor： Zhaoxiang ZHONG ,  Yang ZHAO ,  Zhong YAO

IPC: C23F1/00 ,  H01J37/32

CPC classification number: C01B32/166 ,  B81C1/00158 ,  B81C1/00206 ,  B82Y30/00 ,  B82Y40/00 ,  C01B32/17 ,  C01B32/178 ,  C01B2202/08 ,  H01J2237/334 ,  Y10S977/742 ,  Y10S977/842

Abstract: 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.