Neutral and Charged Polymer Brushes:  A Model Unifying Curvature Effects from Micelles to Flat Surfaces

1997 ◽  
Vol 30 (6) ◽  
pp. 1787-1792 ◽  
Author(s):  
C. Biver ◽  
R. Hariharan ◽  
J. Mays ◽  
W. B. Russel
Keyword(s):  
Polymer Brushes ◽  
Flat Surfaces ◽  
Curvature Effects ◽  
Charged Polymer

Binding of ionic surfactants to charged polymer brushes grafted onto porous substrates

2002 ◽  
Vol 954 (1-2) ◽  
pp. 89-97 ◽  
Author(s):  
Haruhiko Ogawa ◽  
Kazuyuki Sugita ◽  
Kyoichi Saito ◽  
Min Kim ◽  
Masao Tamada ◽  
...  
Keyword(s):  
Polymer Brushes ◽  
Ionic Surfactants ◽  
Charged Polymer ◽  
Porous Substrates

Dynamics of water, hydrated-ions and charged polymers in highly-confined films, and their role in friction modification

2003 ◽  
Vol 790 ◽  
Author(s):  
Jacob Klein ◽  
Uri Raviv ◽  
Susan Perkin ◽  
Nir Kampf ◽  
Suzanne Giasson
Keyword(s):  
Polymer Brushes ◽  
Aqueous Media ◽  
Free Water ◽  
Aqueous Salt Solution ◽  
Ball Bearings ◽  
High Concentration ◽  
Charged Surfaces ◽  
Hydrated Ions ◽  
Charged Polymer ◽  
The One

ABSTRACTRecent studies have revealed that, in contrast to non-associating liquids such as oils or organic solvents, salt-free water retains a viscosity close to its bulk value even when confined to films thinner than some 3 nm, indeed down to only one or two monolayers thick [1,2]. For the case of high concentration aqueous salt solution compressed down to subnanometer films between charged surfaces, the trapped hydrated ions serve to act as molecular ball-bearings, sustaining a large load while remaining very fluid under shear [3]. This behaviour is attributed to the tenacity of the hydration sheaths together with their rapid relaxation time. Finally, a very recent study [4] has shown that when charged polymer brushes in aqueous media are compressed and slid past each other, they provide a lubrication that is considerably superior to that afforded by neutral brushes: This is attributed on the one hand to the resistance to mutual interpenetration of the chains due to entropic barriers in the good-solvent conditions, and, on the other hand, to the hydration-sheaths on the charged polymer segments which can act – as noted above – as molecular ball-bearings.

Surface-Iniatiated Anionic Polymerization: Tethered Polymer Brushes on Silicate Flat Surfaces

2001 ◽  
pp. 39-55 ◽  
Author(s):  
Qingye Zhou ◽  
Yo Nakamura ◽  
Seiji Inaoka ◽  
Mi-kyoung Park ◽  
Yingfan Wang ◽  
...  
Keyword(s):  
Anionic Polymerization ◽  
Polymer Brushes ◽  
Flat Surfaces

Approaching charged polymer brushes

2011 ◽  
Author(s):  
Long Chen ◽  
Holger Merlitz ◽  
Su-zhen He ◽  
Chen-xu Wu ◽  
Jens-Uwe Sommer
Keyword(s):  
Polymer Brushes ◽  
Charged Polymer

Charged Polymer Brushes: Counterion Incorporation and Scaling Relations

1998 ◽  
Vol 81 (19) ◽  
pp. 4172-4175 ◽  
Author(s):  
Heiko Ahrens ◽  
Stephan Förster ◽  
Christiane A. Helm
Keyword(s):  
Polymer Brushes ◽  
Scaling Relations ◽  
Charged Polymer

The kinetic friction coefficient of neutral and charged polymer brushes

Soft Matter ◽  
2013 ◽  
Vol 9 (10) ◽  
pp. 2966 ◽  
Author(s):  
Florent Goujon ◽  
Aziz Ghoufi ◽  
Patrice Malfreyt ◽  
Dominic J. Tildesley
Keyword(s):  
Friction Coefficient ◽  
Polymer Brushes ◽  
Kinetic Friction ◽  
Charged Polymer

scholarly journals Thermo-Responsive Polymer Brushes with Side Graft Chains: Relationship Between Molecular Architecture and Underwater Adherence

2019 ◽  
Vol 20 (24) ◽  
pp. 6295
Author(s):  
Ugo Sidoli ◽  
Hisaschi T. Tee ◽  
Ivan Raguzin ◽  
Jakob Mühldorfer ◽  
Frederik R. Wurm ◽  
...  
Keyword(s):  
Polymer Brushes ◽  
Bulk Solution ◽  
Molecular Architecture ◽  
Adhesive Properties ◽  
Adhesion Properties ◽  
Grafted Polymer ◽  
Flat Surfaces ◽  
Underwater Adhesion ◽  
Lcst Behavior ◽  
Responsive Polymer

During the last few decades, wet adhesives have been developed for applications in various fields. Nonetheless, key questions such as the most suitable polymer architecture as well as the most suitable chemical composition remain open. In this article, we investigate the underwater adhesion properties of novel responsive polymer brushes with side graft chain architecture prepared using “grafting through” approach on flat surfaces. The incorporation in the backbone of thermo-responsive poly(N-isopropylacrylamide) (PNIPAm) allowed us to obtain LCST behavior in the final layers. PNIPAm is co-polymerized with poly(methyl ethylene phosphate) (PMEP), a poloyphosphoester. The final materials are characterized studying the surface-grafted polymer as well as the polymer from the bulk solution, and pure PNIPAm brush is used as reference. PNIPAm-g-PMEP copolymers retain the responsive behavior of PNIPAm: when T > LCST, a clear switching of properties is observed. More specifically, all layers above the critical temperature show collapse of the chains, increased hydrophobicity and variation of the surface charge even if no ionizable groups are present. Secondly, effect of adhesion parameters such as debonding rate and contact time is studied. Thirdly, the reversibility of the adhesive properties is confirmed by performing adhesion cycles. Finally, the adhesive properties of the layers are studied below and above the LCST against hydrophilic and hydrophobic substrates.

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