Evolution and Applications of Polymer Brush Hypersurface Photolithography

2021 ◽  
Author(s):  
Daniel Valles ◽  
Yerzhan Zholdassov ◽  
Adam Braunschweig
Keyword(s):  
Polymer Brushes ◽  
Polymer Brush ◽  
Printing Method

Hypersurface Photolithography (HP) is a printing method for fabricating structures and patterns composed of polymer brushes, and can be used to create patterns with complex topologies or for rapidly accelerating...

Polymer Brushes: High-Resolution, Large-Area, Serial Fabrication of 3D Polymer Brush Structures by Parallel Dip-Pen Nanodisplacement Lithography (Small 23/2012)

Small ◽  
2012 ◽  
Vol 8 (23) ◽  
pp. 3567-3567 ◽  
Author(s):  
Xuechang Zhou ◽  
Zhilu Liu ◽  
Zhuang Xie ◽  
Xuqing Liu ◽  
Zijian Zheng
Keyword(s):  
High Resolution ◽  
Polymer Brushes ◽  
Polymer Brush ◽  
Large Area

scholarly journals Theory of Lubrication due to Poly-Electrolyte Polymer Brushes

2007 ◽  
Vol 1049 ◽  
Author(s):  
Jeffrey B. Sokoloff
Keyword(s):  
Field Theory ◽  
Osmotic Pressure ◽  
Dry Friction ◽  
Polymer Brushes ◽  
Mean Field Theory ◽  
Polymer Brush ◽  
Mean Field ◽  
The Mean ◽  
Coated Surfaces

AbstractIt is shown using a method based on the mean field theory of Miklavic Marcelja that it should be possible for osmotic pressure due to the counterions associated with the two polyelectrolyte polymer brush coated surfaces to support a reasonable load (i.e., about 105 Pa) with the brushes held sufficiently far apart to prevent entanglement of polymers belonging to the two brushes, thus avoiding what is likely to be the dominant mechanisms for static and dry friction.

The structure of polymer brushes near the transition from dilute to dense systems. A computer simulation study

Soft Matter ◽  
2021 ◽  
Author(s):  
Piotr Polanowski ◽  
Andrzej Sikorski
Keyword(s):  
Computer Simulation ◽  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Simulation Study ◽  
Polymer Brushes ◽  
Polymer Brush ◽  
Coarse Grained ◽  
Computer Simulation Study ◽  
Coarse Grained Model ◽  
Cooperative Motion

Monodisperse polymer brushes were studied by means of Monte Carlo simulations. A coarse-grained model of a polymer brush was designed in order and the Cooperative Motion Algorithm was employed to...

scholarly journals Anionic Polymer Brushes for Biomimetic Calcium Phosphate Mineralization—A Surface with Application Potential in Biomaterials

Polymers ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1165 ◽  
Author(s):  
Tobias Mai ◽  
Karol Wolski ◽  
Agnieszka Puciul-Malinowska ◽  
Alexey Kopyshev ◽  
Ralph Gräf ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Polymer Brushes ◽  
Polymer Brush ◽  
Inorganic Component ◽  
Hybrid Films ◽  
Anionic Polymer ◽  
Phosphate Mineralization ◽  
Application Potential ◽  
Good Biocompatibility ◽  
Growth Experiments

This article describes the synthesis of anionic polymer brushes and their mineralization with calcium phosphate. The brushes are based on poly(3-sulfopropyl methacrylate potassium salt) providing a highly charged polymer brush surface. Homogeneous brushes with reproducible thicknesses are obtained via surface-initiated atom transfer radical polymerization. Mineralization with doubly concentrated simulated body fluid yields polymer/inorganic hybrid films containing AB-Type carbonated hydroxyapatite (CHAP), a material resembling the inorganic component of bone. Moreover, growth experiments using Dictyostelium discoideum amoebae demonstrate that the mineral-free and the mineral-containing polymer brushes have a good biocompatibility suggesting their use as biocompatible surfaces in implantology or related fields.

Preparation of Polymer Brushes by Surface-Initiated ARGET ATRP

2013 ◽  
Vol 791-793 ◽  
pp. 208-211 ◽  
Author(s):  
Xiao Meng Chu ◽  
Shao Jie Liu ◽  
Hui Jiao Yang ◽  
Feng Qing Zhao
Keyword(s):  
Molecular Weight ◽  
Silicon Dioxide ◽  
Polymer Brushes ◽  
Polymer Brush ◽  
Surface Modifications ◽  
Organic Substrate ◽  
Research Progress ◽  
Grafting Density ◽  
Arget Atrp ◽  
Inorganic Substrate

This paper firstly summarized the latest research progress on the polymer brushes preparation by surface-initiated ARGET ATRP polymerization. It mainly includes the surface modifications of inorganic substrate (silicon dioxide and carbon nanotubes), and the organic substrate (cellulose and polymer microspheres). This method needs less catalyst and operates more easily, compared to the classical ATRP. Besides, it also has good polymerization controllability, and the polymer brushes have higher grafting density and molecular weight. Therefore, surface-initiated ARGET ATRP polymerization has become an effective method for modifying the surface of materials. Then, we prepared the polymer brush supported TEMPO by the surface-initiated ARGET ATRP and characterized.

Quantifying the robustness of the neutron reflectometry technique for structural characterization of polymer brushes

2021 ◽  
Vol 54 (3) ◽  
Author(s):  
Isaac J. Gresham ◽  
Timothy J. Murdoch ◽  
Edwin C. Johnson ◽  
Hayden Robertson ◽  
Grant B. Webber ◽  
...  
Keyword(s):  
Polymer Brushes ◽  
Volume Fraction ◽  
Polymer Brush ◽  
Real Data ◽  
Data Interpretation ◽  
Neutron Reflectometry ◽  
Free Form ◽  
Diffuse Interfaces ◽  
Form Model

Neutron reflectometry is the foremost technique for in situ determination of the volume fraction profiles of polymer brushes at planar interfaces. However, the subtle features in the reflectometry data produced by these diffuse interfaces challenge data interpretation. Historically, data analyses have used least-squares approaches that do not adequately quantify the uncertainty of the modeled profile and ignore the possibility of other structures that also match the collected data (multimodality). Here, a Bayesian statistical approach is used that permits the structural uncertainty and multimodality to be quantified for polymer brush systems. A free-form model is used to describe the volume fraction profile, minimizing assumptions regarding brush structure, while only allowing physically reasonable profiles to be produced. The model allows the total volume of polymer and the profile monotonicity to be constrained. The rigor of the approach is demonstrated via a round-trip analysis of a simulated system, before it is applied to real data examining the well characterized collapse of a thermoresponsive brush. It is shown that, while failure to constrain the interfacial volume and consider multimodality may result in erroneous structures being derived, carefully constraining the model allows for robust determination of polymer brush compositional profiles. This work highlights that an appropriate combination of flexibility and constraint must be used with polymer brush systems to ensure the veracity of the analysis. The code used in this analysis is provided, enabling the reproduction of the results and the application of the method to similar problems.

scholarly journals Friction between ring polymer brushes

Soft Matter ◽  
2015 ◽  
Vol 11 (16) ◽  
pp. 3139-3148 ◽  
Author(s):  
Aykut Erbaş ◽  
Jarosław Paturej
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Polymer Brushes ◽  
Polymer Brush ◽  
Linear Polymer ◽  
Coarse Grained ◽  
Ring Polymer ◽  
Dynamics Simulations ◽  
Scaling Arguments ◽  
Coarse Grained Molecular Dynamics

Friction between ring polymer brush bilayers sliding past each other is studied using extensive coarse-grained molecular dynamics simulations and scaling arguments, and the results are compared to the friction between bilayers of linear polymer brushes.

Polymer Brush-Lined Membranes for Flow and Filtration Control

1995 ◽  
Vol 385 ◽  
Author(s):  
Edith M. Sevick ◽  
Frank A. Bruce ◽  
David R.M. Williams
Keyword(s):  
Shear Rate ◽  
Poisson’S Ratio ◽  
Polymer Brushes ◽  
Polymer Brush ◽  
Poisson's Ratio ◽  
Negative Poisson’S Ratio ◽  
Critical Shear Rate ◽  
Cylindrical Pores ◽  
Negative Poisson's Ratio

ABSTRACTWe describe the flow and filtration control imparted to membranes through the adsorption of polymer brushes onto the interior pores. The brushes exhibit a negative Poisson's ratio, i.e. they swell under shear, and as a result behave as sensors and valves controlling the flow and filtration through the pore. The valve-behavior of brushes adsorbed onto cylindrical pores displays the same constant discharge control but also exhibits a critical shear rate for brush swelling.

scholarly journals Polymer Brush Coating and Adhesion Technology at Scale

Polymers ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1475 ◽  
Author(s):  
Kristian Birk Buhl ◽  
Asger Holm Agergaard ◽  
Mie Lillethorup ◽  
Jakob Pagh Nikolajsen ◽  
Steen Uttrup Pedersen ◽  
...  
Keyword(s):  
Polymer Brushes ◽  
High Performance ◽  
Large Scale ◽  
Polymer Brush ◽  
Dissimilar Materials ◽  
Industrial Applications ◽  
Polymer Materials ◽  
Full Potential ◽  
Scale Production ◽  
Precise Control

Creating strong joints between dissimilar materials for high-performance hybrid products places high demands on modern adhesives. Traditionally, adhesion relies on the compatibility between surfaces, often requiring the use of primers and thick bonding layers to achieve stable joints. The coatings of polymer brushes enable the compatibilization of material surfaces through precise control over surface chemistry, facilitating strong adhesion through a nanometer-thin layer. Here, we give a detailed account of our research on adhesion promoted by polymer brushes along with examples from industrial applications. We discuss two fundamentally different adhesive mechanisms of polymer brushes, namely (1) physical bonding via entanglement and (2) chemical bonding. The former mechanism is demonstrated by e.g., the strong bonding between poly(methyl methacrylate) (PMMA) brush coated stainless steel and bulk PMMA, while the latter is shown by e.g., the improved adhesion between silicone and titanium substrates, functionalized by a hydrosilane-modified poly(hydroxyethyl methacrylate) (PHEMA) brush. This review establishes that the clever design of polymer brushes can facilitate strong bonding between metals and various polymer materials or compatibilize fillers or nanoparticles with otherwise incompatible polymeric matrices. To realize the full potential of polymer brush functionalized materials, we discuss the progress in the synthesis of polymer brushes under ambient and scalable industrial conditions, and present recent developments in atom transfer radical polymerization for the large-scale production of brush-modified materials.

Sliding Friction between Polymer-brush-bearing Surfaces: Crossover from Brush-brush Interfacial Shear to Polymer-substrate Slip.

2000 ◽  
Vol 651 ◽  
Author(s):  
Jacob Klein
Keyword(s):  
Polymer Brushes ◽  
Shear Force ◽  
Reasonable Agreement ◽  
Sliding Friction ◽  
Polymer Brush ◽  
Interfacial Shear ◽  
Force Response ◽  
Shear Forces ◽  
Stick Slip ◽  
Frictional Forces

AbstractA model is presented for the shear (or frictional) forces Fs between two surfaces a distance D apart as they slide past each other while bearing mutually compressed polymer brushes, on the assumption that sliding takes place at the brush-brush interface. The predictions of the model for the rapid increase in Fs at increasing compressions are in reasonable agreement with experiments on polystyrene brushes immersed in toluene over two decades in Fs. At higher compressions (smaller D) the experimental shear forces increase only slowly, and diverge from the calculated ones which continue to increase rapidly; at the same time the form of the shear force response at these higher compressions reverts from a viscous-like one to a stick-slip behaviour. These observations strongly indicate that at sufficiently high compressions the plane of slip crosses over from the brush-brush interface to the polymer-solid surface.

Sign in / Sign up

Export Citation Format

Share Document