Phase Separated Block Copolymer Particles with Tuneable Morphologies: Striped, Onion, and Patchy Particles

2016 ◽  
Vol 69 (7) ◽  
pp. 741 ◽  
Author(s):  
Chao Chen ◽  
Zeyun Xiao ◽  
Luke A. Connal
Keyword(s):  
Aqueous Solution ◽  
Block Copolymer ◽  
Self Assembly ◽  
Diblock Copolymers ◽  
Volume Fraction ◽  
Particle Morphology ◽  
Prolate Spheroid ◽  
Patchy Particles ◽  
Vinyl Pyridine ◽  
Conventional Structure

The aqueous solution self-assembly of a series of poly(2-vinyl pyridine)-block-poly(dimethylsiloxane) (P2VP-b-PDMS) diblock copolymers is reported. The particles show a phase separated interior morphology which can be tuned from onion-like sphere to axially stacked lamella with dimensions in the nanoscale. The key to this transition is the control of the interfacial properties using a mixture of two surfactants with preferential wetting to the respective blocks (P2VP or PDMS). Influence of block weights on particle morphology was investigated with results showing that the volume fraction of PDMS plays a crucial role in self-assembly, and a non-conventional structure of a prolate spheroid nanoparticle with a unique phase separated interior morphology can be synthesised.

scholarly journals Nanostructures from POSS-Grafted Block Copolymer Precursors

2000 ◽  
Vol 661 ◽  
Author(s):  
Seung B. Chun ◽  
Patrick T. Mather
Keyword(s):  
Block Copolymer ◽  
Diblock Copolymers ◽  
Volume Fraction ◽  
Organic Hybrid ◽  
Hybrid Copolymer ◽  
The Matrix ◽  
Nanoporous Surface ◽  
Vinyl Group ◽  
Oligomeric Silsesquioxane ◽  
Microdomain Structure

ABSTRACTA new method to prepare novel nanocomposites has been studied in which a polyhedral oligomeric silsesquioxane (POSS) monomer is grafted to a polyisoprene-block-polystyrene copolymer to yield an inorganic-organic hybrid copolymer (POSS-g-PI-block-PS). PS-block-PI copolymers (SI) were synthesized via anionic polymerization in tetrahydrofuran (THF) as solvent. The polyisoprene block of the SI diblock copolymers in this study featured a very high vinyl group fraction (65 mole % of 3,4- addition and 35 mole % of 1,2-addition) available to react with hydride-substituted POSS (isobutyldimethyl silane-POSS) to form a grafted block copolymer. Due to the immiscibility between POSS-grafted PI block and PS block, the grafted block copolymer developed a microdomain structure. The volume fraction of PS block in the grafted block copolymer was varied in the range of 0.45 to 0.37 in order to yield cylindrical PS microdomains in the matrix of POSS-grafted PI. After exposure to an oxygen plasma, it is expected that preferential erosion of the grafted block copolymer will occur for the organic potion (PS microdomains) thus leaving a well-defined nanoporous surface structure for nonlithographic functionalization of coated substrates.

scholarly journals Self-assembly of liquid crystal block copolymer PEG-b-smectic polymer in pure state and in dilute aqueous solution

2009 ◽  
Vol 143 ◽  
pp. 235 ◽  
Author(s):  
Bing Xu ◽  
Rafael Piñol ◽  
Merveille Nono-Djamen ◽  
Sandrine Pensec ◽  
Patrick Keller ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Liquid Crystal ◽  
Block Copolymer ◽  
Self Assembly ◽  
Pure State ◽  
Dilute Aqueous Solution ◽  
Crystal Block

“Raft” Formation by Two-Dimensional Self-Assembly of Block Copolymer Rod Micelles in Aqueous Solution

2014 ◽  
Vol 126 (34) ◽  
pp. 9146-9149 ◽  
Author(s):  
Georgios Rizis ◽  
Theo G. M. van de Ven ◽  
Adi Eisenberg
Keyword(s):  
Aqueous Solution ◽  
Block Copolymer ◽  
Self Assembly ◽  
Two Dimensional

Polydispersity-Driven Block Copolymer Amphiphile Self-Assembly into Prolate-Spheroid Micelles

2012 ◽  
Vol 1 (2) ◽  
pp. 300-304 ◽  
Author(s):  
Andrew L. Schmitt ◽  
Milton H. Repollet-Pedrosa ◽  
Mahesh K. Mahanthappa
Keyword(s):  
Block Copolymer ◽  
Self Assembly ◽  
Prolate Spheroid

scholarly journals A mild and quantitative route towards well-defined strong anionic/hydrophobic diblock copolymers: synthesis and aqueous self-assembly

2019 ◽  
Vol 10 (45) ◽  
pp. 6109-6115
Author(s):  
Anton H. Hofman ◽  
Remco Fokkink ◽  
Marleen Kamperman
Keyword(s):  
Aqueous Solution ◽  
Self Assembly ◽  
Diblock Copolymers

Well-defined hydrophobic/strong anionic diblock copolymers were synthesized through a protected hydrophobic intermediate. Their self-assembly in aqueous solution was subsequently studied.

“Raft” Formation by Two-Dimensional Self-Assembly of Block Copolymer Rod Micelles in Aqueous Solution

2014 ◽  
Vol 53 (34) ◽  
pp. 9000-9003 ◽  
Author(s):  
Georgios Rizis ◽  
Theo G. M. van de Ven ◽  
Adi Eisenberg
Keyword(s):  
Aqueous Solution ◽  
Block Copolymer ◽  
Self Assembly ◽  
Two Dimensional

scholarly journals Poly(ethylene glycol)-b-poly(vinyl acetate) block copolymer particles with various morphologies via RAFT/MADIX aqueous emulsion PISA

2020 ◽  
Vol 11 (23) ◽  
pp. 3922-3930
Author(s):  
Paul Galanopoulo ◽  
Pierre-Yves Dugas ◽  
Muriel Lansalot ◽  
Franck D'Agosto
Keyword(s):  
Block Copolymer ◽  
Ethylene Glycol ◽  
Vinyl Acetate ◽  
Self Assembly ◽  
Diblock Copolymers ◽  
Poly Ethylene Glycol ◽  
Aqueous Emulsion ◽  
Amphiphilic Diblock Copolymers ◽  
Poly Ethylene

The polymerization-induced self-assembly (PISA) of amphiphilic diblock copolymers of poly(ethylene glycol)-b-poly(vinyl acetate) in water was achieved through macromolecular design via interchange of xanthate (MADIX) polymerization in emulsion.

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