Gas separation performance of carbon materials produced from phenolic resin: Effects of carbonization temperature and ozone post treatment

The mechanical strength of polymeric membranes is one of the limitations for their applications. Carbon materials are effective in reinforcing polymeric materials, but it is unknown whether they would degrade the membranes’ gas separation performance. In this paper, using brominated poly (2,6-dimethyl-1,4-phenylene oxide) (BPPO) as matrix, nanocomposite membranes of BPPO/graphene, BPPO/carbon back and BPPO/fullerene were prepared. The CO2 permeability and CO2/N2 selectivity of the nanocomposite membranes were studied. Different from the BPPO/carbon black and BPPO/fullerene membranes, the BPPO/graphene membrane was found having improved gas separation performance after incorporation 2 wt. % graphene.

Download Full-text

Effects of Curing Method on the Gas Separation Performance of Phenolic Resin/Poly(vinyl Alcohol)-Based Carbon Membrane Materials

Materials Science Forum ◽

10.4028/www.scientific.net/msf.675-677.1185 ◽

2011 ◽

Vol 675-677 ◽

pp. 1185-1188

Author(s):

Bing Zhang ◽

Yong Hong Wu ◽

Tong Hua Wang ◽

Jie Shan Qiu ◽

Tie Jun Xu ◽

...

Keyword(s):

Thermal Stability ◽

Gas Separation ◽

Vinyl Alcohol ◽

Phenolic Resin ◽

Poly Vinyl Alcohol ◽

Separation Performance ◽

Carbon Membrane ◽

Carbon Membranes ◽

Curing Methods ◽

Gas Separation Performance

A novel cheap blended precursor phenolic resin/poly(vinyl alcohol) (PR/PVA) was developed to prepare carbon membranes. The effect of two curing methods (i.e., crosslinker and preoxidation) on the gas separation performance of their derived carbon membranes was investigated. Thermogravimetric analysis (TGA), Differential scanning calorimetry (DSC) and Fourier transform infrared (FTIR) spectroscopy were used to analyze the thermal stability of precursor and the changes in functional groups on membrane surface. The gas permeation of carbon membranes was tested for H2 and N2. The results show that PR, PR/PVA, and two PR/PVA cured samples have three thermal degradation stages. The thermal stability for original PR/PVA membrane is significantly improved via the method of preoxidation or crosslinker. Similar crosslinking structure is formed by the two curing methods. However, carbon membranes from crosslinker method present two-fold higher in hydrogen permeability and four-fold higher in selectivity than that from preoxidation method.

Download Full-text

Hyperaging Tuning of a Carbon Molecular‐Sieve Hollow Fiber Membrane with Extraordinary Gas‐Separation Performance and Stability

Angewandte Chemie International Edition ◽

10.1002/anie.201904913 ◽

2019 ◽

Vol 58 (34) ◽

pp. 11700-11703 ◽

Cited By ~ 9

Author(s):

Wulin Qiu ◽

Justin Vaughn ◽

Gongping Liu ◽

Liren Xu ◽

Mark Brayden ◽

...

Keyword(s):

Gas Separation ◽

Hollow Fiber ◽

Molecular Sieve ◽

Hollow Fiber Membrane ◽

Separation Performance ◽

Fiber Membrane ◽

Carbon Molecular Sieve ◽

Gas Separation Performance

Download Full-text

The spirobichroman-based polyimides with different side groups: from structure–property relationships to chain packing and gas transport performance

RSC Advances ◽

10.1039/d0ra10113c ◽

2021 ◽

Vol 11 (9) ◽

pp. 5086-5095

Author(s):

Shuli Wang ◽

Xiaohua Tong ◽

Chunbo Wang ◽

Xiaocui Han ◽

Sizhuo Jin ◽

...

Keyword(s):

Dihedral Angle ◽

Gas Separation ◽

Gas Transport ◽

Critical Role ◽

Polymer Membranes ◽

Separation Performance ◽

Structure Property ◽

Chain Packing ◽

Structure Property Relationships ◽

Gas Separation Performance

Effect of substituents on the dihedral angle and chain packing plays a critical role in the enhancement in the gas separation performance of polymer membranes.

Download Full-text