Synthesis, Structure and Properties of the Grafted Peptidomimetic Polymer Brushes Based on Poly(N-methacryloyl-L-proline)

A new approach to synthesis at the aminated glass surface of novel biocompatible polymeric nanolayers consisting of poly(N-methacryloyl-L-proline) brushes has been developed. Formation of the polymer nanolayers has been realized in several stages. At the first stage, the glass surface has been modified by aminosilane (APTEC), afterwards monolayer of the peroxide-containing initiator (PI) based on pyromellitic acid has been tethered to this aminated surface. The immobilized PI has been used further for initiation of the grafting "from the surface" polymerization of N-methacryloyl-L-proline for obtaining of the peptidomimetic polymer brushes. Features of the reactions, as well as optimal conditions for performing the process are highlighted in this work. Presented here poly(N-methacryloyl-L-proline) grafted brush coatings are promising material for numerous applications in nanomedicine, especially for production of implants and systems of the controlled interaction with proteins and cells.

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Nanostructured Polymer Brushes With Reversibly Changing Properties

MRS Proceedings ◽

10.1557/proc-727-r2.5 ◽

2002 ◽

Vol 727 ◽

Author(s):

Denys Usov ◽

Manfred Stamm ◽

Sergiy Minko ◽

Christian Froeck ◽

Andreas Scholl ◽

...

Keyword(s):

Polymer Brushes ◽

Phase Segregation ◽

Water Contact ◽

Angle Measurements ◽

Nanostructured Polymer ◽

Contact Angle Measurements ◽

Vertical Segregation ◽

Oxygen Plasma Etching ◽

Grafting From ◽

Photoemission Electron

AbstractWe investigated the interplay between different mechanisms of the lateral and vertical segregation in the synthesized via “grafting from” approach symmetric A/B (where A and B are poly(styrene-co-2,3,4,5,6-pentafluorostyrene) and poly(methylmethacrylate), respectively) polymer brushes upon exposure to different solvents. We used X-ray photoemission electron spectroscopy and microscopy (X-PEEM), AFM, water contact angle measurements, and oxygen plasma etching to study morphology of the brushes. The ripple morphology after toluene (nonselective solvent) revealed elongated lamellar-like domains of A and B polymers alternating across the surface. The dimple-A morphology consisting of round clusters of the polymer A was observed after acetone (selective solvent for B). The top layer was enriched with the polymer B showing that the brush underwent both the lateral and vertical phase segregation. A qualitative agreement with predictions of SCF theory was found.

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Preparation and thermostability of hydrophobic modified nanocrystalline cellulose

Nordic Pulp & Paper Research Journal ◽

10.1515/npprj-2020-0048 ◽

2020 ◽

Vol 0 (0) ◽

Author(s):

Junliang Lu ◽

Jinyan Lang ◽

Na Wang ◽

Xinhui Wang ◽

Ping Lan ◽

...

Keyword(s):

Stearic Acid ◽

Palmitic Acid ◽

Lauric Acid ◽

Morphological Structure ◽

Strong Stability ◽

Nanocrystalline Cellulose ◽

Original Structure ◽

Optimal Conditions ◽

Reaction Conditions ◽

New Approach

Abstract In this paper, we provide a new approach for the anionic modification and functional application of nanocellulose. The nanocrystalline cellulose (NCC) is prepared from microcrystalline cellulose (MCC) and modified by fatty acids (lauric acid, palmitic acid and stearic acid). Ammonium ceric sulfate or hydrogen peroxide/ferrous sulfate being used as an initiator, three kinds of modified nanocrystalline cellulose (MNCC) can be synthesized at low temperature. The terminology for these MNCC is L-MNCC (NCC modified by lauric acid), P-MNCC (NCC modified by palmitic acid) and S-MNCC (NCC modified by stearic acid). Compared with those existing synthesized methods, the reaction condition is mild, and the modified products show strong stability. It can be seen from morphological structure analysis and reaction conditions analysis of MNCC that the original structure of cellulose is changed slightly. And the optimal conditions for preparing MNCC are obtained. The best yields of L-MNCC, P-MNCC and S-MNCC are 54.2 %, 20.9 % and 14.5 %, respectively.

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Synthesis of Poly(ester-graft-methyl methacrylate) on a Macroinitiator with Lateral Sulfonyl Chloride Groups by Atom Transfer Radical Polymerization

Polymer Science Series B ◽

10.1134/s1560090421040072 ◽

2021 ◽

Vol 63 (4) ◽

pp. 385-391

Author(s):

T. K. Meleshko ◽

A. B. Razina ◽

N. N. Bogorad ◽

M. P. Kurlykin ◽

A. V. Kashina ◽

...

Keyword(s):

Mechanical Properties ◽

Methyl Methacrylate ◽

Atom Transfer Radical Polymerization ◽

Radical Polymerization ◽

Polymer Brushes ◽

Sulfonyl Chloride ◽

Physical And Mechanical Properties ◽

Degree Of Polymerization ◽

Side Chains ◽

Grafting From

Abstract New polymer brushes with an ester backbone and poly(methyl methacrylate) side chains are synthesized by polycondensation and polymerization methods. The initiating groups are sulfonyl chloride groups laterally attached to the polyester chain. PMMA side chains are grafted by the ATRP method according to the “grafting from” multicenter macroinitiator strategy. The conditions for the polymerization processes in a controlled mode are selected, and the ways of targeted regulation of the degree of polymerization of methacrylate side chains are determined. Using the synthesized copolymers self-supporting films are obtained, and their physical and mechanical properties are studied.

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Segregated Polymer Brushes via "Grafting to" and ATRP "Grafting from" Chain Anchoring

ACS Symposium Series - Controlled/Living Radical Polymerization: Progress in ATRP ◽

10.1021/bk-2009-1023.ch015 ◽

2009 ◽

pp. 215-230 ◽

Cited By ~ 6

Author(s):

Yong Liu ◽

Viktor Klep ◽

Igor Luzinov

Keyword(s):

Polymer Brushes ◽

Grafting From

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Revival of the R-Group Approach: A “CTA-shuttled” Grafting from Approach for Well-Defined Cylindrical Polymer Brushes via RAFT Polymerization

Macromolecular Rapid Communications ◽

10.1002/marc.201300578 ◽

2013 ◽

Vol 35 (2) ◽

pp. 234-241 ◽

Cited By ~ 26

Author(s):

Zhicheng Zheng ◽

Jun Ling ◽

Axel H. E. Müller

Keyword(s):

Polymer Brushes ◽

Raft Polymerization ◽

Group Approach ◽

Grafting From

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Structure and Properties of High-Density Polymer Brushes Prepared by Surface-Initiated Living Radical Polymerization

Surface-Initiated Polymerization I - Advances in Polymer Science ◽

10.1007/12_063 ◽

2006 ◽

pp. 1-45 ◽

Cited By ~ 419

Author(s):

Yoshinobu Tsujii ◽

Kohji Ohno ◽

Shinpei Yamamoto ◽

Atsushi Goto ◽

Takeshi Fukuda

Keyword(s):

Radical Polymerization ◽

Polymer Brushes ◽

Living Radical Polymerization ◽

High Density ◽

Structure And Properties

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Polypeptide Polymer Brushes by Light-Induced Surface Polymerization of Amino Acid N -Carboxyanhydrides

Macromolecular Rapid Communications ◽

10.1002/marc.201700743 ◽

2018 ◽

Vol 39 (7) ◽

pp. 1700743 ◽

Cited By ~ 6

Author(s):

Timo Stukenkemper ◽

Xavier Paquez ◽

M. W. G. M. Verhoeven ◽

Emiel J. M. Hensen ◽

Aylvin A. Dias ◽

...

Keyword(s):

Amino Acid ◽

Polymer Brushes ◽

Surface Polymerization

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The Preparation of PAN Composite TiO2 Nano-ACF and the Conditions Study

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.586.58 ◽

2012 ◽

Vol 586 ◽

pp. 58-63 ◽

Cited By ~ 1

Author(s):

Yan Bo Wu ◽

Ying Chun Yan ◽

Ting Lou ◽

Tie Ben Song

Keyword(s):

Carbon Fiber ◽

Decisive Role ◽

Solution Concentration ◽

Oxidation Time ◽

Oxidation Temperature ◽

Structure And Properties ◽

Optimal Conditions ◽

Characteristic Peak ◽

Electrostatic Spinning ◽

Easy Operation

With its simple, easy operation, electrostatic spinning has become the most important and effective way on the preparation of nano-fibers. Through experiments, we identified the optimal conditions for the preparation of PAN nano-fibers composite TiO2 are: the spinning solution concentration is 12%, the angle is 5~8°, the spinning distance is 8cm, and the voltage is 12kV. The pre-oxidation largely determine the structure and properties of carbon fiber in the preparation of carbon nano-fibers. The temperature plays a decisive role on pre-oxidation. Through SEM、TG-DTA and FTIR, we explore the best conditions for the pre-oxidation temperature is 280°C and the pre-oxidation time is 2h. After carbonization and activation, the characteristic peak of TiO2 appeared at 2θ=25.2°, 37.7°in the patterns of XRD.

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