Preparation of hydrophobic polymer particles by radical polymerization and subsequent modification into magnetically doped particles

2012 ◽  
Vol 127 (1) ◽  
pp. 620-627 ◽  
Author(s):  
Hasan Ahmad ◽  
Mohammad Abu-Waesmin ◽  
Mohammad Mahbubor Rahman ◽  
Mohammad Abdul Jalil Miah ◽  
Klaus Tauer
Keyword(s):  
Radical Polymerization ◽  
Polymer Particles ◽  
Hydrophobic Polymer ◽  
Subsequent Modification ◽  
Magnetically Doped

scholarly journals High Encapsulation Efficiency of Magnetite Nanoparticles in Hydrophobic Polymer Microcapsules using Microsuspension Conventional Radical Polymerization

2019 ◽  
Vol 35 (2) ◽  
pp. 516-522 ◽  
Author(s):  
Jittaya Sadchaiyaphum ◽  
Pongsathon Phapugrangkul ◽  
Preeyporn Chaiyasat ◽  
Amorn Chaiyasat
Keyword(s):  
Aqueous Solution ◽  
Oleic Acid ◽  
Radical Polymerization ◽  
Magnetite Nanoparticles ◽  
Driving Force ◽  
Encapsulation Efficiency ◽  
Polymer Particle ◽  
Polymer Shell ◽  
Hydrophobic Polymer ◽  
Co Precipitation

High encapsulation efficiency of magnetite nanoparticles (MNPs; Fe3O4) in microcapsules using PDVB as a hydrophobic polymer shell was successfully achieved by microsuspension conventional radical polymerization (ms CRP). MNPs were initially synthesized by co-precipitation of Fe2+/Fe3+ in a binary phase. During the nucleation of MNPs in alkaline aqueous solution existing oleic acid (OA), MNPs were coated with OA (MNPs-OA) before moving to the toluene phase with the addition of salt. At OA concentration of 0.3 wt%, most of the nucleated MNPs were hydrophobic and well dispersed in the toluene phase. Using DVB as a monomer for ms CRP, high encapsulation efficiency (92 %EE) of MNPs-OA was obtained, with low free polymer particle formation. By contrast, large amounts of free polymer particles were observed at low %EE (32%) of MNPs. The main driving force for high %EE was obtained by coating the surface of the MNPs by OA which increased hydrophobicity.

Novel Magnetically Doped Epoxide Functional Cross-linked Hydrophobic Poly(lauryl methacrylate) Composite Polymer Particles for Removal of As(III) from Aqueous Solution

2017 ◽  
Vol 56 (27) ◽  
pp. 7747-7756 ◽  
Author(s):  
Rukhsana Shabnam ◽  
Muhammad A. Rahman ◽  
Muhammad A. J. Miah ◽  
Mostafa K. Sharafat ◽  
Hasan M. T. Islam ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Composite Polymer ◽  
Polymer Particles ◽  
Composite Polymer Particles ◽  
Magnetically Doped

scholarly journals Mechanical properties of cross-linked polymer particles prepared by nitroxide-mediated radical polymerization in aqueous micro-suspension

Polymer ◽  
2007 ◽  
Vol 48 (13) ◽  
pp. 3836-3843 ◽  
Author(s):  
Takuya Tanaka ◽  
Toyoko Suzuki ◽  
Yuichi Saka ◽  
Per B. Zetterlund ◽  
Masayoshi Okubo
Keyword(s):  
Mechanical Properties ◽  
Radical Polymerization ◽  
Polymer Particles

Poly(thiolactone) homo- and copolymers from maleimide thiolactone: synthesis and functionalization

2015 ◽  
Vol 6 (23) ◽  
pp. 4240-4251 ◽  
Author(s):  
Tobias Rudolph ◽  
Pieter Espeel ◽  
Filip E. Du Prez ◽  
Felix H. Schacher
Keyword(s):  
Free Radical ◽  
Radical Polymerization ◽  
Free Radical Polymerization ◽  
Subsequent Modification

We describe the synthesis of a thiolactone-functionalized maleimide (MITla), its copolymerization into poly(thiolactone) homo- and copolymers via controlled or free radical polymerization (CRP or FRP) techniques, and subsequent modification.

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