Imine-linked polymer/silica composites for CO2 sequestration

The silica supported imine polymers are synthesized using a facile single step Schiff-base condensation. The formation of imine linkage on silica support is confirmed using FT-IR and solid state 13C NMR. The crystallinity and surface morphology of the materials are examined by PXRD and SEM analyses....

Full description

Saved in:
Bibliographic Details
Published in:Materials chemistry and physics 2020-01, Vol.239, p.121995, Article 121995
Main Authors: Senthilkumaran, Marimuthu, Eswaran, Lakshmanan, Saravanan, Chokalingam, Puthiaraj, Pillaiyar, Rameshkumar, Perumal, Muthu Mareeswaran, Paulpandian
Format: Article
Language:English
Subjects:
Adsorption
Adsorption isotherms
Carbon dioxide
CO2 capture
Condensation polymerization
Heat of adsorption
Imines
Isotherms
Morphology
NMR
Nuclear magnetic resonance
Polymer matrix composites
Schiff-base
Selectivity
Silica particles
Silicon dioxide
Stability analysis
Surface chemistry
Thermal stability
Thermodynamic parameters
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The silica supported imine polymers are synthesized using a facile single step Schiff-base condensation. The formation of imine linkage on silica support is confirmed using FT-IR and solid state 13C NMR. The crystallinity and surface morphology of the materials are examined by PXRD and SEM analyses. The thermal stability of the materials is confirmed from TGA analysis. N2 sorption isotherms for Si-TPA-1 and Si-TPA-2 exhibit surface area of 105.8 m2/g and 404.5 m2/g respectively. The adsorption isotherms exhibit meso- and microporous environments of Si-TPAs. The CO2 uptake capacity of Si-TPAs are around 38.86 mg/g - 121. 85 mg/g. The experimental adsorption data is fitted with Langmuir and Freundlich adsorption isotherm models. The thermodynamic parameters emphasis that the adsorption process is spontaneous and exothermic physisorption. Isosteric heats of adsorption for Si-TPAs are around 38.5–32.5 kJ/mol. The high selectivity of CO2 over N2 is obtained for both Si-TPAs at 273 K and also high selectivity of CO2 over CH4 is achieved at 298 K. [Display omitted] •Polymer/silica composites are synthesized by One-step polycondensation reaction.•Polymer/silica composites show considerable BET surface area as well as CO2 capture efficiency.•Composites are having good reproducibility at high number of adsorption and desorption process.•The high selectivity of CO2 over N2 and considerable selectivity of CO2 over CH4 is achieved.
ISSN:0254-0584
1879-3312
DOI:10.1016/j.matchemphys.2019.121995