Bi-functional random copolymers for one-pot fabrication of superamphiphobic particulate coatings

Ganwei Zhang; Jiwen Hu; Guojun Liu; Hailiang Zou; Yuanyuan Tu; Fei Li; Shengyu Hu; Hongsheng Luo

doi:10.1039/c3ta10722a

Bi-functional random copolymers for one-pot fabrication of superamphiphobic particulate coatings

Journal of Materials Chemistry A ◽

10.1039/c3ta10722a ◽

2013 ◽

Vol 1 (20) ◽

pp. 6226 ◽

Cited By ~ 31

Author(s):

Ganwei Zhang ◽

Jiwen Hu ◽

Guojun Liu ◽

Hailiang Zou ◽

Yuanyuan Tu ◽

...

Keyword(s):

Random Copolymers ◽

One Pot ◽

Particulate Coatings

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Functionalized random copolymers from versatile one-pot click chemistry/ATRP tandems approaches

Journal of Polymer Science Part A Polymer Chemistry ◽

10.1002/pola.23438 ◽

2009 ◽

Vol 47 (15) ◽

pp. 3803-3813 ◽

Cited By ~ 34

Author(s):

Denis Damiron ◽

Mylène Desorme ◽

Roxana-Viorela Ostaci ◽

Samer Al Akhrass ◽

Thierry Hamaide ◽

...

Keyword(s):

Click Chemistry ◽

Random Copolymers ◽

One Pot

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Electron microscopy of crystalline structure in thermotropic random copolymers

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100089585 ◽

1991 ◽

Vol 49 ◽

pp. 1054-1055

Author(s):

Afzana Anwer ◽

S. Eilidh Bedford ◽

Richard J. Spontak ◽

Alan H. Windle

Keyword(s):

Electron Microscopy ◽

Crystalline Structure ◽

Liquid Crystalline ◽

Elevated Temperatures ◽

Random Copolymers ◽

Molecular Characteristics ◽

Scanning Calorimetry ◽

X Ray ◽

Identical Monomer ◽

Periodic Layer

Random copolyesters composed of wholly aromatic monomers such as p-oxybenzoate (B) and 2,6-oxynaphthoate (N) are known to exhibit liquid crystalline characteristics at elevated temperatures and over a broad composition range. Previous studies employing techniques such as X-ray diffractometry (XRD) and differential scanning calorimetry (DSC) have conclusively proven that these thermotropic copolymers can possess a significant crystalline fraction, depending on molecular characteristics and processing history, despite the fact that the copolymer chains possess random intramolecular sequencing. Consequently, the nature of the crystalline structure that develops when these materials are processed in their mesophases and subsequently annealed has recently received considerable attention. A model that has been consistent with all experimental observations involves the Non-Periodic Layer (NPL) crystallite, which occurs when identical monomer sequences enter into register between adjacent chains. The objective of this work is to employ electron microscopy to identify and characterize these crystallites.

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A metal- coating Chamber for High-Resolution Cryo-SEM

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100180847 ◽

1990 ◽

Vol 48 (1) ◽

pp. 418-419

Author(s):

John G. Sheehan

Keyword(s):

High Resolution ◽

Colloidal Suspensions ◽

Metal Coating ◽

Colloidal Interactions ◽

Amorphous Ice ◽

High Vapor ◽

Particulate Coatings ◽

20 Nm ◽

Film Nucleation ◽

Coating Chamber

Improvements in particulate coatings for printable paper require understanding mechanisms of colloidal interactions in paper coating suspensions. One way to deduce colloidal interactions is to mage particle spacings and orientations at high resolution with cryo-SEM. Recent improvements in cryo-SEM technique have increased resolution enough to image particles in coating paints,vhich are sometimes smaller than 100 nm. In this report, a metal-coating chamber is described for preparation of colloidal suspensions for cryo-SEM at resolution down to 20 nm. It was found that etching is not necessary to achieve this resolution.A 120 K cryo-SEM sample will remain in an SEM for hours without noticeable condensation of imorphous ice. This is due to the high vapor pressure of vapor-condensed amorphous ice, measured by Kouchi. However, clean vacuum is required to coat samples with the thinnest possible continuous metal films which are required for high magnification SEM. Vapor contaminants, especially hrydrocarbons, are known to interfere with thin-film nucleation and growth so that more metal is needed to form continuous films, and resolution is decreased. That is why the metal-coating chamber in fig. 1 is designed for the cleanest possible vacuum. Feedthroughs for the manipulator md the shutter, which are operated during metal coating, are sealed with leak-proof stainless-steel Dellows. The transfer rod slides through a baseplate feedthrough that is double o-ring sealed.

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