Abstract
Carbon dioxide (CO2) is responsible for approximately 80% of greenhouse gases emission that is the main source to global climate change causing notable environmental impacts. Poly (ethylene glycol) diacrylate (PEGDA) have polar PEG repeating units, which provide a strong affinity towards carbon dioxide (CO2) molecules has been blended with 3-aminopropyltrimethoxysilane (APTMS) to synthesize membrane for CO2/nitrogen (N2) separation. The new synthesized membrane is studied for potential applications in gas separation and to be implemented in control CO2 emission. APTMS is also used to delay the diffusion between polymer and solvent. In this study, concentration of polymer of PEGDA and casting solvent of APTMS in terms of mol ratio from a range of 0.9:1.1 to 1.3:0.7 is discussed. Based on the results, PEGDA membrane shows best gas separation performance at mol ratio of PEGDA to APTMS of 1:1 where the permeance for both CO2/N2, and CO2/N2 selectivity are 75.21±0.15 GPU, 22.95±0.05 GPU and 3.28±0.12, respectively. An optimal aminosilane/polymer reaction ratio benefits the gas separation performance of the membrane due to the affinity of the membrane towards CO2 and formation of different membrane surface morphology.
Highlights
Global climate change has been an arising issue in the recent decade prompting organizations such as Intergovernmental Panel on Climate Change into taking proper course of resolving the issue or mitigating the effects of climate change [1]
(ethylene glycol) diacrylate (PEGDA) have polar PEG repeating units, which provide a strong affinity towards carbon dioxide (CO2) molecules has been blended with 3aminopropyltrimethoxysilane (APTMS) to synthesize membrane for CO2 /nitrogen (N2) separation
The Effects of Poly (ethylene glycol) diacrylate (PEGDA) and APTMS Concentration The main aim of this study is to investigate the effect of the concentration of PEGDA and APTMS on the membrane structure and gas separation performance of PEGDA membrane
Summary
Global climate change has been an arising issue in the recent decade prompting organizations such as Intergovernmental Panel on Climate Change into taking proper course of resolving the issue or mitigating the effects of climate change [1]. PEGDA polymer have the potential of good mechanical and diffusive properties to be fabricated as gas separation membrane [12]. The enhancement in the mechanical properties of this membrane had significantly increased the CO2/N2 selectivity due to the increase in cross-linking density that reduces the pore formation and affects gas separation performance [14]. The main aim of this research is to fabricate PEGDA membrane for CO2/N2 separation using different polymer and solution concentration to optimize membrane’s performance. Many works have been conducted to identify the effects of polymer concentration of various polymers on the gas separation performance. This research is conduct to understand the relationship between the effects of both polymer (PEGDA) and solvent (APTMS) concentration on the structure and properties of membrane. The suitability of APTMS as a casting solvent is to be identified through this experimental work by comparing its advantages and disadvantages exhibited by the membrane synthesized
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