NDLI: Hydrophobic Core/Hydrophilic Shell Amphiphilic Particles *

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Hydrophobic Core/Hydrophilic Shell Amphiphilic Particles *

Content Provider	Scilit
Author	Yun, Yang Li, Hangquan Ruckenstein, Eli
Copyright Year	2019
Description	Amphiphilic colloidal particles with hydrophobic cores and hydrophilic shells were prepared via a two-step method. First, polystyrene cores were obtained through the concentrated emulsion polymerization. A mixture of styrene, ethyl benzene, divinyl benzene, azobisisobutyronitrile, and cumene hydroperoxide (CHPO) was partially polymerized at 80°C for 40 min and subsequently used as the dispersed phase of a concentrated emulsion in water. The concentrated emulsion was subjected to complete polymerization at 60°C for 12 h; colloidal particles of crosslinked polystyrene were thus obtained. In the second step, the polystyrene particles were dispersed in water, after which acrylamide, N,N′-methylenebisacrylamide, and ferrous sulfate (FS) were added. The system was heated (typically at 30°C) to conduct the polymerization of the hydrophilic monomers. The CHPO present on the surface of the polystyrene particles and the FS present in the aqueous phase (both together constitute a redox initiator) ensured that the initiation occurred mostly on the surface of the particles and that the hydrophilic polymer obtained formed a shell encapsulating the particles. Under proper conditions, a porous outer shell could be generated, making the hydrophobic core accessible to the outside medium. Book Name: Concentrated Emulsion Polymerization
Related Links	https://content.taylorfrancis.com/books/download?dac=C2018-0-93095-7&isbn=9780429026577&doi=10.1201/9780429026577-12&format=pdf
Ending Page	138
Page Count	11
Starting Page	128
DOI	10.1201/9780429026577-12
Language	English
Publisher	Informa UK Limited
Publisher Date	2019-03-29
Access Restriction	Open
Subject Keyword	Book Name: Concentrated Emulsion Polymerization Polymer Science Particles Polymerization Amphiphilic Hydrophobic Benzene Polystyrene Emulsion Hydrophilic
Content Type	Text
Resource Type	Chapter

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