Process and Environmental Research Division Summer Placement 2011 Amina Hasanova, K. Adlington, J. El harfi, D. J. Irvine, T. Drage Novel Hyperbranched Polymer Synthesis for CO 2 Capture •Polymerisation was carried out in an oil bath (Fig.2) using 15:15 mL of DVB:cyclohexanone at 80-150 o C for 6-45 mins. •Thermogravimetric analysis (Fig.3: TGA Q500) was carried out under a stream of a CO 2 gas and the change in weight was recorded as a function of temperature. Previous studies have demonstrated that PEI (polyethyleneimine) on silica can be used to store carbon dioxide. We have been investigating the potential of hyperbranched divinylbenzene (h-PDVB) as a replacement or support for PEI to uptake CO 2 . The branched structure of h-PDVB, which is composed of pores, potentially allows to trap CO 2 . The project was focused on synthesising h-PDVB via catalytic chain transfer polymerisation (CCTP), as described in Fig.1, using PhCoBF as a catalyst . Co N N O B O N N O B O F F F F Co (II) R R R Co (III) Co (III) Co (II) [M] Growing polymer chain Figure 1. Proposed mechanism for the CCTP polymerisation of DVB catalyzed by PhCoBF. PEI PEI on silica hyperbranched DVB hydrogenated DVB styrene Graph to show weight change as a function of time Graph to show weight change as a function of time Experimentals Acknowledgement Special thank you to BP for sponsoring the project and everyone in lab B10 Results The synthesis of h-PDVB via CCTP has shown to be more effective compared to dendrimers made via different reaction routes: • short reaction times (less than 20 mins) • relatively high yield (>50%) • easy experimental procedure (one pot synthesis) TGA analysis has shown that PEI on silica can uptake up to 9.0 % CO 2 whereas PEI and h-PDVB were found to uptake 1.7% and 4.7%, respectively. Fig.2 Setup for CCTP of h-PDVB Fig.3 Thermogravimetric analysis Introduction

Novel Hyperbranched Polymer Synthesis for CO2 Capture

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Page 1: Novel Hyperbranched Polymer Synthesis for CO2 Capture

Process and Environmental Research Division

Summer Placement 2011

Amina Hasanova, K. Adlington, J. El harfi, D. J. Irvine, T. Drage

Novel Hyperbranched Polymer Synthesis for CO2 Capture

•Polymerisation was carried out in an oil bath (Fig.2) using 15:15 mL of DVB:cyclohexanone at 80-150 oC for 6-45 mins.

•Thermogravimetric analysis (Fig.3: TGA Q500) was carried out under a stream of a CO2 gas and the change in weight was recorded as a function of temperature.

Previous studies have demonstrated that PEI (polyethyleneimine) on silica can be used to store carbon dioxide. We have been investigating the potential of hyperbranched divinylbenzene (h-PDVB) as a replacement or support for PEI to uptake CO2. The branched structure of h-PDVB, which is composed of pores, potentially allows to trap CO2. The project was focused on synthesising h-PDVB via catalytic chain transfer polymerisation (CCTP), as described in Fig.1, using PhCoBF as a catalyst .

F F

Co(II)

R R

Co(III)

Co(II)

[M]

Growing polymer chain

Figure 1. Proposed mechanism for the CCTP polymerisation of DVB catalyzed by PhCoBF.

PEI

PEI on silica

hyperbranched DVB

hydrogenated DVB

styrene

Graph to show weight change as a function of time

Experimentals

Acknowledgement Special thank you to BP for sponsoring the project and everyone in lab B10

Results

The synthesis of h-PDVB via CCTP has shown to be more effective compared to dendrimers made via different reaction routes: • short reaction times (less than 20 mins) • relatively high yield (>50%) • easy experimental procedure (one pot synthesis) TGA analysis has shown that PEI on silica can uptake up to 9.0 % CO2 whereas PEI and h-PDVB were found to uptake 1.7% and 4.7%, respectively.

Fig.2 Setup for CCTP of h-PDVB Fig.3 Thermogravimetric analysis

Introduction