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Polymer surface modification by adso...

Chen, Yong.

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Polymer surface modification by adsorption from supercritical fluids.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Polymer surface modification by adsorption from supercritical fluids./
Author:	Chen, Yong.
Description:	115 p.
Notes:	Adviser: Jeffrey T. Koberstein.
Contained By:	Dissertation Abstracts International69-01B.
Subject:	Engineering, Chemical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3299253
ISBN:	9780549431145

Polymer surface modification by adsorption from supercritical fluids.
Chen, Yong.

Polymer surface modification by adsorption from supercritical fluids. - 115 p.

Adviser: Jeffrey T. Koberstein.

Thesis (Ph.D.)--Columbia University, 2008.

In this thesis, we develop a novel and simple approach to modify polymer surfaces by adsorbing functionalized polymers from supercritical fluids to get desirable properties. One example described in the thesis uses a photoactive block copolymer poly(styrene-b-tert-butylacrylate) (P(S- b-tBA)) to modify a polystyrene (PS) substrate. Supercritical fluid coating yields a surface bilayer structure with the low surface tension tert-butyl acrylate block residing at the polymer-air interface and the high surface tension PS block entangled with the PS substrate. A surface functionalized with carboxylic acid groups is subsequently formed and/or patterned by exposing the surface to UV radiation in the presence of a photo acid generator or by exposure to an acid such as trifluoroacetic acid. The part of surface covered by carboxylic acid groups is hydrophilic and reactive whereas the original surface is hydrophobic and inert. The surface patterned with tert-butyl regions and carboxylic acid regions is used as a template for selective electroless nickel deposition. The surface fully covered by carboxylic acid groups is conjugated with adhesion ligand, YRGDS, to improve surface biocompatibility. Another example is the use of poly(dimethyl siloxane) (PDMS) based antimicrobial polymers to coat both hydrophobic and hydrophilic cloth fibers to make the fibers have biological welfare. The antibacterial ability of the coated fibers is evaluated by standard methods.

ISBN: 9780549431145Subjects--Topical Terms:

1018531
Engineering, Chemical.

Polymer surface modification by adsorption from supercritical fluids.
LDR:02803nam 2200277 a 45 001 955489
005 20110622
008 110622s2008 ||||||||||||||||| ||eng d
020 $a 9780549431145
035 $a (UMI)AAI3299253
035 $a AAI3299253
040 $a UMI $c UMI
100 1 $a Chen, Yong. $3 1017770
245 1 0 $a Polymer surface modification by adsorption from supercritical fluids.
300 $a 115 p.
500 $a Adviser: Jeffrey T. Koberstein.
500 $a Source: Dissertation Abstracts International, Volume: 69-01, Section: B, page: 0481.
502 $a Thesis (Ph.D.)--Columbia University, 2008.
520 $a In this thesis, we develop a novel and simple approach to modify polymer surfaces by adsorbing functionalized polymers from supercritical fluids to get desirable properties. One example described in the thesis uses a photoactive block copolymer poly(styrene-b-tert-butylacrylate) (P(S- b-tBA)) to modify a polystyrene (PS) substrate. Supercritical fluid coating yields a surface bilayer structure with the low surface tension tert-butyl acrylate block residing at the polymer-air interface and the high surface tension PS block entangled with the PS substrate. A surface functionalized with carboxylic acid groups is subsequently formed and/or patterned by exposing the surface to UV radiation in the presence of a photo acid generator or by exposure to an acid such as trifluoroacetic acid. The part of surface covered by carboxylic acid groups is hydrophilic and reactive whereas the original surface is hydrophobic and inert. The surface patterned with tert-butyl regions and carboxylic acid regions is used as a template for selective electroless nickel deposition. The surface fully covered by carboxylic acid groups is conjugated with adhesion ligand, YRGDS, to improve surface biocompatibility. Another example is the use of poly(dimethyl siloxane) (PDMS) based antimicrobial polymers to coat both hydrophobic and hydrophilic cloth fibers to make the fibers have biological welfare. The antibacterial ability of the coated fibers is evaluated by standard methods.
520 $a The success of each research aspect is confirmed and characterized by a number of techniques, including XPS, contact angle, AVM, and ellipsometry. It is shown that the supercritical fluid coating method is a general, inexpensive, and environmental friendly approach for successful surface modification. Properties of polymer surfaces are easily controlled by functional groups in modifying polymers and the modified surfaces have many new applications.
590 $a School code: 0054.
650 4 $a Engineering, Chemical. $3 1018531
690 $a 0542
710 2 $a Columbia University. $3 571054
773 0 $t Dissertation Abstracts International $g 69-01B.
790 $a 0054
790 1 0 $a Koberstein, Jeffrey T., $e advisor
791 $a Ph.D.
792 $a 2008
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3299253