Synthesis of superparamagnetic Fe3O4/SiO2 composite particles via sol-gel process based on inverse miniemulsion

Dual-functional natural-fiber reinforced composites by incorporating magnetite

“…The magnetic hysteresis curves showed that the Kenaf/magnetite/polyester composites exhibited a clear hysteretic behavior but not for the Kenaf/polyester composite. Regarding H c and M r , the Kenaf/magnetite/polyester composites showed negligible coercivity and remanence, confirming the superparamagnetic properties [40,49]. The M s of the Kenaf/magnetite20/polyester, Kenaf/magnetite30/polyester, and Kenaf/magnetite40/polyester composites were 19.3, 25.5, and 29.2 emu g -1 , respectively, which showed a gradual enhancement with the increase in magnetite content.…”

Materials engineering for surface-confined flame retardancy

“…viscose). With respect to untreated fibres, the temperatures of their first degradation step and of flame combustion of volatile products were found increased by 20 8C, while the temperature rise of Methyl red [190,191] Shielding of X/a-rays Barium sulphate [192] Super-paramagnetism Fe 3 O 4 [193] glowing combustion of the residue was higher than 40 8C. Similar results were collected by our group applying the same strategy to cotton, polyester and their blends [209]: indeed, the formation of a continuous silica film deposited on the fibres (regardless of the type) exerted a protective role towards their thermal degradation in air.…”

RAFT Inverse Miniemulsion Polymerization of Acrylamide

“…[2,3] Inverse miniemulsion polymerization has not been thoroughly investigated, although the commercial process for making high-molecular-weight water-soluble polymers, termed inverse emulsion polymerization, shares some of the features of inverse miniemulsion polymerization (e.g., droplet nucleation, application of high shear). [3][4][5][6][7][8][9] Controlled radical polymerizations, such as reversible addition fragmentation transfer (RAFT) polymerization, have been demonstrated to be potentially useful, and are important new approaches to the production of polymers with well-defined or special architectures in a controlled manner. [10][11][12][13][14] Here we combine RAFT chemistry with inverse miniemulsion polymerization for the first time.…”