Membrane rigidity induced by grafted polymer brush

Soft Matter ◽  
2015 ◽  
Vol 11 (7) ◽  
pp. 1376-1385 ◽  
Author(s):  
Zhen Lei ◽  
Shuang Yang ◽  
Er-Qiang Chen
Keyword(s):  
Polymer Brush ◽  
Grafted Polymer ◽  
Membrane Rigidity ◽  
Curvature Elasticity ◽  
Neutral Polymer

The contribution of neutral polymer brush to the curvature elasticity of the grafting surface is investigated theoretically.

Light-Responsive Polymer Surfaces via Postpolymerization Modification of Grafted Polymer-Brush Structures

Langmuir ◽  
2014 ◽  
Vol 30 (49) ◽  
pp. 14971-14981 ◽  
Author(s):  
Matthias Dübner ◽  
Nicholas D. Spencer ◽  
Celestino Padeste
Keyword(s):  
Polymer Brush ◽  
Polymer Surfaces ◽  
Grafted Polymer ◽  
Responsive Polymer

scholarly journals Oil Deposition on Polymer Brush-Coated NF Membranes

Membranes ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 168 ◽  
Author(s):  
Anh Vu ◽  
Naama Segev Mark ◽  
Guy Z. Ramon ◽  
Xianghong Qian ◽  
Arijit Sengupta ◽  
...  
Keyword(s):  
Membrane Fouling ◽  
Membrane Surface ◽  
Polymer Brush ◽  
Operating Mode ◽  
Feed Solution ◽  
Polymer Chains ◽  
Membrane Properties ◽  
Solution Temperature ◽  
Oil Droplets ◽  
Grafted Polymer

Membrane-based processes are attractive for treating oily wastewaters. However, membrane fouling due to the deposition of oil droplets on the membrane surface compromises performance. Here, real-time observation of the deposition of oil droplets by direct confocal microscopy was conducted. Experiments were conducted in dead-end and crossflow modes. Base NF 270 nanofiltration membranes as well as membranes modified by grafting poly(N-isopropylacrylamide) chains from the membrane surface using atom transfer radical polymerization were investigated. By using feed streams containing low and high NaCl concentrations, the grafted polymer chains could be induced to switch conformation from a hydrated to a dehydrated state, as the lower critical solution temperature for the grafted polymer chains moved above and below the room temperature, respectively. For the modified membrane, it was shown that switching conformation of the grafted polymer chains led to the partial release of adsorbed oil. The results also indicate that, unlike particles such as polystyrene beads, adsorption of oil droplets can lead to coalescence of the adsorbed oil droplets on the membrane surface. The results provide further evidence of the importance of membrane properties, feed solution characteristics, and operating mode and conditions on membrane fouling.

Effects of polydispersity in the end-grafted polymer brush

1989 ◽  
Vol 22 (2) ◽  
pp. 853-861 ◽  
Author(s):  
S. T. Milner ◽  
T. A. Witten ◽  
M. E. Cates
Keyword(s):  
Polymer Brush ◽  
Grafted Polymer

Polymer brush guided templating on well-defined rod-like cellulose nanocrystals

2018 ◽  
Vol 9 (13) ◽  
pp. 1650-1657 ◽  
Author(s):  
Maria Morits ◽  
Ville Hynninen ◽  
Nonappa Nonappa ◽  
Antoine Niederberger ◽  
Olli Ikkala ◽  
...  
Keyword(s):  
Cellulose Nanocrystals ◽  
Polymer Brushes ◽  
Polymer Brush ◽  
Porous Silica ◽  
Hybrid Nanomaterials ◽  
Grafted Polymer ◽  
Highly Porous ◽  
Silica Nanorods

Precisely grafted polymer brushes on cellulose nanocrystals guide the formation of silica and yield uniform CNC-based hybrid nanomaterials which are subsequently used in the fabrication of hollow and highly porous silica nanorods.

Inclusion Interaction of Highly Densely PEO Grafted Polymer Brush and α-Cyclodextrin

2005 ◽  
Vol 38 (9) ◽  
pp. 3845-3851 ◽  
Author(s):  
Lihong He ◽  
Jin Huang ◽  
Yongming Chen ◽  
Xiaojuan Xu ◽  
Liping Liu
Keyword(s):  
Polymer Brush ◽  
Grafted Polymer ◽  
Inclusion Interaction

Neutron Reflectivity Study of the Density Profile of a Model End-Grafted Polymer Brush: Influence of Solvent Quality

1994 ◽  
Vol 73 (25) ◽  
pp. 3407-3410 ◽  
Author(s):  
A. Karim ◽  
S. K. Satija ◽  
J. F. Douglas ◽  
J. F. Ankner ◽  
L. J. Fetters
Keyword(s):  
Density Profile ◽  
Polymer Brush ◽  
Neutron Reflectivity ◽  
Grafted Polymer ◽  
Solvent Quality ◽  
Influence Of Solvent

Grafted polymer brush coatings for growth of cow granulosa cells and oocyte-cumulus cell complexes

2020 ◽  
Vol 15 (3) ◽  
pp. 031006
Author(s):  
Yurij Stetsyshyn ◽  
Joanna Raczkowska ◽  
Khrystyna Harhay ◽  
Kamil Awsiuk ◽  
Yana Shymborska ◽  
...  
Keyword(s):  
Granulosa Cells ◽  
Polymer Brush ◽  
Cumulus Cell ◽  
Cell Complexes ◽  
Grafted Polymer

scholarly journals Collective Dynamics of an End-Grafted Polymer Brush in Solvents of Varying Quality

2004 ◽  
Vol 92 (11) ◽  
Author(s):  
G. E. Yakubov ◽  
B. Loppinet ◽  
H. Zhang ◽  
J. Rühe ◽  
R Sigel ◽  
...  
Keyword(s):  
Polymer Brush ◽  
Collective Dynamics ◽  
Grafted Polymer

scholarly journals Densely Packed Tethered Polymer Nanoislands: A Simulation Study

Polymers ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2570
Author(s):  
Nicolas Chen ◽  
Oleg Davydovich ◽  
Caitlyn McConnell ◽  
Alexander Sidorenko ◽  
Preston B. Moore
Keyword(s):  
Rational Design ◽  
Polymer Brush ◽  
Structural Features ◽  
Polymer Chains ◽  
Semiflexible Polymers ◽  
Grafted Polymer ◽  
Neighbor Effect ◽  
Critical Components ◽  
Different Characteristics ◽  
External Stimuli

COordinated Responsive Arrays of Surface-Linked polymer islands (CORALS) allow for the creation of molecular surfaces with novel and switchable properties. Critical components of CORALs are the uniformly distributed islands of densely grafted polymer chains (nanoislands) separated by regions of bare surface. The grafting footprint and separation distances of nanoislands are comparable to that of the constituent polymer chains themselves. Herein, we characterize the structural features of the nanoislands and semiflexible polymers within to better understand this critical constituent of CORALs. We observe different characteristics of grafted semiflexible polymers depending on the polymer island’s size and distance from the center of the island. Specifically, the characteristics of the chains at the island periphery are similar to isolated tethered polymer chains (full flexible chains), while chains in the center of the island experience the neighbor effect such as chains in the classic polymer brush. Chains close to the edge of the islands exhibit unique structural features between these two regimes. These results can be used in the rational design of CORALs with specific interfacial characteristics and predictable responses to external stimuli. It is hoped that this the discussion of the different morphologies of the polymers as a function of distance from the edge of the polymer will find applications in a wide variety of systems.

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