Preparation, Properties, and Self-Assembly Behavior of PTFE-Based Core-Shell Nanospheres

Nanosized PTFE-based core-shell particles can be prepared by emulsifier-free seed emulsion polymerization technique starting from spherical or rod-like PTFE seeds of different size. The shell can be constituted by the relatively high Tg polystyrene and polymethylmethacrylate as well as by low Tg polyacrylic copolymers. Peculiar thermal behavior of the PTFE component is observed due to the high degree of PTFE compartmentalization. A very precise control over the particle size can be exerted by properly adjusting the ratio between the monomers and the PTFE seed. In addition, the particle size distribution self-sharpens as the ratio monomer/PTFE increases. Samples with uniformity ratios suited to build 2D and 3D colloidal crystals are easily prepared. In particular, 2D colloidal crystal of spheres leads to very small 2D nanostructuration, useful for the preparation of masks with a combination of nanosphere lithography and reactive ion etching. 3D colloidal crystals were also obtained featuring excellent opal quality, which is a direct consequence of the monodispersity of colloids used for their growth.

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Well-defined colloidal crystal films from the 2D self-assembly of core–shell semi-soft nanoparticles

Polymer Chemistry ◽

10.1039/c5py00912j ◽

2015 ◽

Vol 6 (41) ◽

pp. 7297-7307 ◽

Cited By ~ 6

Author(s):

Hadi Sabouri ◽

Kohji Ohno ◽

Sébastien Perrier

Keyword(s):

Self Assembly ◽

Colloidal Crystal ◽

Colloidal Crystals ◽

Core Shell ◽

Polymer Shell ◽

Crystal Films ◽

Silica Core ◽

Shell Particles ◽

Soft Nanoparticles ◽

Core Polymer

Silica core–polymer shell particles are obtained from surface mediated RAFT polymerisation and assembled into ordered 2D colloidal crystals.

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Preparation and Properties of PTFE-PMMA Core-Shell Nanoparticles and Nanocomposites

Journal of Nanotechnology ◽

10.1155/2012/875815 ◽

2012 ◽

Vol 2012 ◽

pp. 1-10 ◽

Cited By ~ 3

Author(s):

Diego Antonioli ◽

Michele Laus ◽

Giampaolo Zuccheri ◽

Valerj Kapeliouchko ◽

Maria Cristina Righetti ◽

...

Keyword(s):

Particle Size ◽

Core Shell ◽

Seeded Emulsion Polymerization ◽

Shell Nanoparticles ◽

Precise Control ◽

Seed Particles ◽

Wide Compositional Range ◽

Shell Forming ◽

Shell Particles ◽

Core Shell Nanoparticles

The preparation of polytetrafluoroethylene-poly(methyl methacrylate) (PTFE-PMMA) core-shell particles was described, featuring controlled size and narrow size distribution over a wide compositional range, through a seeded emulsion polymerization starting from a PTFE seed of 26 nanometers. Over the entire MMA/PTFE range, the particle size increases as the MMA/PTFE ratio increases. A very precise control over the particle size can be exerted by properly adjusting the ratio between the monomer and the PTFE seed. Particles in the 80–240 nm range can be prepared with uniformity indexes suited to build 2D and 3D colloidal crystals. These core-shell particles were employed to prepare nanocomposites with different compositions, through an annealing procedure at a temperature higher than the glass transition temperature of the shell forming polymer. A perfect dispersion of the PTFE particles within the PMMA matrix was obtained and optically transparent nanocomposites were prepared containing a very high PTFE amount.

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Preceramic core-shell particles for the preparation of hybrid colloidal crystal films by melt-shear organization and conversion into porous ceramics

Materials & Design ◽

10.1016/j.matdes.2018.10.032 ◽

2018 ◽

Vol 160 ◽

pp. 926-935 ◽

Cited By ~ 6

Author(s):

Steffen Vowinkel ◽

Anna Boehm ◽

Timmy Schäfer ◽

Torsten Gutmann ◽

Emanuel Ionescu ◽

...

Keyword(s):

Colloidal Crystal ◽

Porous Ceramics ◽

Core Shell ◽

Crystal Films ◽

Shell Particles

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Synthesis of magnetic mesoporous titania colloidal crystals through evaporation induced self-assembly in emulsion as effective and recyclable photocatalysts

Physical Chemistry Chemical Physics ◽

10.1039/c5cp05005g ◽

2015 ◽

Vol 17 (41) ◽

pp. 27653-27657 ◽

Cited By ~ 18

Author(s):

Jeffrey E. Chen ◽

Hong-Yuan Lian ◽

Saikat Dutta ◽

Saad M. Alshehri ◽

Yusuke Yamauchi ◽

...

Keyword(s):

Crystal Structure ◽

Magnetic Properties ◽

Self Assembly ◽

Colloidal Crystal ◽

Colloidal Crystals ◽

Mesoporous Titania ◽

Evaporation Induced Self Assembly

This study illustrates the directed self-assembly of mesoporous TiO2 with magnetic properties due to its colloidal crystal structure with Fe3O4.

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Adsorption of novel thermosensitive graft-copolymers: Core–shell particles prepared by polyelectrolyte multilayer self-assembly

Journal of Colloid and Interface Science ◽

10.1016/j.jcis.2005.12.027 ◽

2006 ◽

Vol 298 (1) ◽

pp. 124-131 ◽

Cited By ~ 17

Author(s):

Mihaela Rusu ◽

Dirk Kuckling ◽

Helmuth Möhwald ◽

Monika Schönhoff

Keyword(s):

Self Assembly ◽

Graft Copolymers ◽

Core Shell ◽

Polyelectrolyte Multilayer ◽

Shell Particles

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Particle size and shell composition as effective parameters on MFFT for acrylic core–shell particles prepared via seeded emulsion polymerization

Progress in Organic Coatings ◽

10.1016/j.porgcoat.2014.06.018 ◽

2014 ◽

Vol 77 (11) ◽

pp. 1874-1882 ◽

Cited By ~ 10

Author(s):

Iraj Hasanzadeh ◽

Ali Reza Mahdavian ◽

Hamid Salehi-Mobarakeh

Keyword(s):

Particle Size ◽

Emulsion Polymerization ◽

Core Shell ◽

Effective Parameters ◽

Seeded Emulsion Polymerization ◽

Shell Composition ◽

Shell Particles

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Colloidal Crystal Beads Composed of Core–Shell Particles for Multiplex Bioassay

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2009.1296 ◽

2009 ◽

Vol 9 (4) ◽

pp. 2586-2591 ◽

Cited By ~ 10

Author(s):

Hua Xu ◽

Cun Zhu ◽

Yuanjin Zhao ◽

Xiangwei Zhao ◽

Jing Hu ◽

...

Keyword(s):

Colloidal Crystal ◽

Core Shell ◽

Shell Particles

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Mechano-Optical Octave-Tunable Elastic Colloidal Crystals Made from Core−Shell Polymer Beads with Self-Assembly Techniques

Langmuir ◽

10.1021/la062602n ◽

2007 ◽

Vol 23 (6) ◽

pp. 2961-2969 ◽

Cited By ~ 33

Author(s):

Wendel Wohlleben ◽

Frank W. Bartels ◽

Stephan Altmann ◽

Reinhold J. Leyrer

Keyword(s):

Self Assembly ◽

Colloidal Crystals ◽

Core Shell ◽

Polymer Beads

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Effect of Particles Size on the Properties of Nano Core-Shell Ni/TiO2 EMR Fluid

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.211-212.775 ◽

2011 ◽

Vol 211-212 ◽

pp. 775-779 ◽

Cited By ~ 10

Author(s):

Suo Kui Tan ◽

Xiao Ping Song ◽

Qiao Li ◽

Hong Yan Guo ◽

Song Ji ◽

...

Keyword(s):

Magnetic Field ◽

Particle Size ◽

Electromagnetic Field ◽

Electrorheological Fluid ◽

Critical Value ◽

Core Shell ◽

Fluid Properties ◽

Shell Particles ◽

The Relationship ◽

Er Fluid

By means of mechanical properties test， the relationship among particle size，electric field，magnetic field ,electromagnetic field and shear ratio on the Ni/TiO2/Urea core-shell particles electrorheological fluid properties analyses. It is found that with increasing particle size， the property of electrorheological fluid decreased, and with increasing shear ratio the property of electrorheological fluid increased for same composition ER. At same time, the smaller of particle size, the higher of ER properties, but there is a critical value for shear ratio, the properties of ER is near value for same composition ER fluid. In magnetic field, the properties of ER showed a contrary result, the smaller of particle size, the lower of ER properties，and electromagnetic field make the properties increase.

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