Near Surface Crystallization of Pluronic P123

Gerth, Stefan; Klimczak, M.; Nelson, Andrew; Magerl, A.

doi:10.1088/1742-6596/340/1/012088

Cited by 1 publication

(1 citation statement)

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“…Hybrid hydrogels/block–copolymer mesophases (the physical or chemical network of water-soluble polymers), formed via incorporation of small amounts of inorganic nanoparticles as additives into the gel matrix, have unlocked hydrogels with tailored mechanical properties. , Magnetic polymer nanocomposites as additives give additional tunability via the ability to manipulate the properties of the hydrogels by applying a magnetic field. Magnetic polymer nanocomposites are of significant interest due to the combination of excellent magnetic properties, stability, and biocompatibility. , In this regard, combining block polymers, e.g., pluronics, with magnetic nanoparticles seems highly attractive, given that they offer a model system for the study of gelation, percolation, crystallization, or the glass transition − and a colloidal solution of magnetic nanoparticles forms the ideal system for the study of magnetic-field-induced self-assembly …”

Section: Introductionmentioning

confidence: 99%

Macroscopic Alignment of Micellar Crystals with Magnetic Microshearing

Saini

Wolff

2019

Langmuir

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The effect of small quantities of a magnetic polymer nanocomposite (formed by surfactant Pluronic F127 @ Fe3O4 nanoparticles of 10 and 30 nm diameters) on the crystallization behavior of Pluronic F127 micelles solvated by 20% in water was investigated in the vicinity of hydrophilic and hydrophobic interfaces. Introducing magnetic nanoparticle at the core imparts magnetic properties to the polymeric micelle and increases its hydrodynamic diameter. These magnetic polymer nanocomposites act as defects in the pluronic crystal and hinder crystallization in comparison to pure Pluronic F127 micelles’ behavior. The magnetic field results in a motion of the magnetic micelles and a microshearing effect. This microshearing assists in self-organization of the crystal. Addition of magnetic micelles formed using 30 nm magnetite particles shows similar crystallization behavior, however, with an overall reduced crystallinity due to their significantly larger size compared to the lattice parameter and the dimension of the interstitial cavity for an fcc structure.

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