Synthesis of polyacrylamide (PAM) beads in microreactors
| Autor: | R. Sirsam, K.T. Shenoy, Nirvik Sen, T. Shaikh, Krishan Kant Singh |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Dodecane Process Chemistry and Technology General Chemical Engineering Dispersity Polyacrylamide Aqueous two-phase system Mixing (process engineering) Energy Engineering and Power Technology 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Industrial and Manufacturing Engineering 0104 chemical sciences Volumetric flow rate chemistry.chemical_compound Monomer chemistry Chemical engineering Microreactor 0210 nano-technology |
| Zdroj: | Chemical Engineering and Processing - Process Intensification. 157:108105 |
| ISSN: | 0255-2701 |
| DOI: | 10.1016/j.cep.2020.108105 |
| Popis: | A microreactor based continuous inverse suspension polymerization method for synthesis of uniform spherical polyacrylamide (PAM) hydrogel beads is reported. Aqueous phase containing monomer, cross-linker and initiator was dispersed in the form of droplets into a carrier phase (dodecane) by using a microfluidic T-junction. The residence time for the reaction was provided by a microbore tube connected to the T-junction. The effects of factors such as O/A ratio (ratio of the volumetric flow rates of the organic carrier phase and the aqueous phase), microbore tube diameter, design of the microfluidic junction and monomer concentration on the shape, size and uniformity of the beads formed were studied in detail. Two different mixing approaches – in-situ mixing and ex-situ mixing – were also compared. The size of the beads could be varied by changing the O/A ratio. The design of the microfluidic junction and the diameter of the residence time element were found to have significant effect on the size and shape of the beads. Spherical and monodispersed (polydispersity index |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect