Fabrication and functionalization of nano-micro polymer tubes by using ATRP-self-assembly technique and immobilization of gold particles onto self-assembly modified surfaces [Elektronische Ressource] / vorgelegt von Abbass Kazemi

Abbass Kazemi

Informations

• Publié par: philipps-universitat_marburg
• Publié le: 01 janvier 2006
• Nombre de lectures: 144
• Poids de l'ouvrage: 8 Mo

Extrait

Abbass Kazemi
Fabrication and Functionalization of Nano-Micro Polymer Tubes by
Using ATRP/Self-assembly Technique
and
Immobilization of Gold Particles onto Self-assembly Modified-
SurfacesAbbass Kazemi
Fabrication and Functionalization of Nano-Micro Polymer Tubes by Using
ATRP/Self-assembly Technique and Immobilization of Gold Particles onto Self-
assembly Mmodified-SurfacesFabrication and Functionalization of Nano-Micro Polymer Tubes by
Using ATRP/Self-assembly Technique
and
Immobilization of Gold Particles onto Self-assembly Modified-
Surfaces
Dissertation
Zur
Erlangung des Doktorgrades
der naturwissenschaften
(Dr. rer. Nat.)
dem
Fachbereich Chemie der Pilipps-Universität Marburg
vorgelegt von
Abbass Kazemi
aus
Teheran
Marburg / Lahn 2006Vom Fachbereich Chemie
der Philipps-Universität Marburg
als Dissertation angenommen: 26.07. 2006
Erstgutachter: Prof. Dr. A. Greiner
Zweitgutachter: Prof. Dr. H. J. Wendorff
Prüfer: Prof. Dr. B. Neumüller
Prüfer: Prof. Dr. N. HamppDon't try to hold on to this. You'll lose it.
Don't pull the curtain. It will end.
This moment with all of us here is paradise,
but don't try to leave this way. You'll ruin it.
Jelaluddin Rumi
(1207-1273)I
CONTENTS
ACKNOWLEDGEMENT
TABLE OF SIMBOLS AND ABBREVIATIONS
1. INTRODUCTION AND THEORETICAL BACKGROUND 1
1.1. Introduction 1
1.2. Electrospinnig 5
1.2.1. Introduction 5
1.2.2. Which factors can effect the fibers characteristics? 5
1.3. Preparation of PPX by Chemical vapour deposition (CVD) process 8
1.3.1. An introduction to PPX formation 8
1.3.2. CVD machine 9
1.4. TUFT process 10
1.5. Atom transfer radical polymerization (ATRP) 11
1.5.1. Introduction 11
1.5.2. General procedure of ATRP 12
1.5.3. Mechanism of ATRP 12
1.5.4. Characteristics of the polymers synthesized by ATRP 13
1.5.5. Monomers 13
1.5.6. Solvents 15
1.5.7. Catalyst 15
1.6. Polyelectrolytes 16
1.7. Layer by layer (LbL) self-assembly of polyelectrolytes 17
1.8. Immobilization of gold on the self-assembly-modified surfaces 19
1.8.1. Introduction 19
1.8.2. General immobilization of gold nanoparticles onto the 19
modified-surfaces bearing thiol (mercapto) groups
1.9. Motivation 20
2. RESULTS AND DISCUSSION 22
2.1. FIBERS BY ELECTROSPINNING 22II
2.1.1. PLLA fibers 22
2.1.2. Silica fibers 23
2.2. Core-shell fibers 24
2.2.1. PLLA fibers coated with PPX (PLLA-PPX core-shell fibers) 24
2.2.2. Silica fibers coated with PEMs (silica-PEM fibers) 25
2.3. Production of hollow fibers by TUFT process 29
2.3.1. PPX tubes 29
2.3.2. PEM hollow fibers 30
2.3.2.1. Hollow fibers made of PEMs of (PEI/PSS ) 31SDS 30
2.3.2.2. Deformation of PEMs of PEI(PAA/PAH) PAA coated on the 3629
surface of silica fibers
2.4. Surface modification of PPX tubes with PEMs by using layer by layer self assembly 36
technique
2.4.1. H SO -treated PPX tubes H SO -treated PPX tubes 372 4 2 4
2.4.2. PEM formation on the H SO -treated PPX tubes 392 4
2.4.3. HCl treatment 42
2.4.3.1. HCl treatment of the PPX tubes coated with PEMs of 42
(PEI/PSS )SDS 30
2.4.3.2. HCl treatment of the PPX tubes coated with PEMs of 44
PEI(PAA/PAH) PAA29
2.5. Sealing process of PPX tubes 46
2.5.1. PPX tubes sealed with pH sensitive polymer by using ATRP 47
2.5.2. PPX tubes sealed with thermo-sensitive polymer by using ATRP 51
2.5.3. PPX tubes sealed with PEMs by self-assembly
2.6. ATRP of N,N-diisopropyl ammonium acrylate in presence of air 56
2.7. Immobilization of Gold Particles on the thiol-modified-surfaces of PPX 59
Films/tubes by using self-assemblyy
2.7.1. Gold particles immobilized using the gold sol prepared by reduction 60
of HAuCl (Au ) onto the thiol-modified surfaces of the films/tube4 redAu(III)
2.7.1.1. Gold particles from Au immobilized on the SH-mod-Sur-1 60redAu(III)
2.7.1.2. Gold particles from Au immobilized on the SH-mod-Sur-2 64redAu(III)
2.7.1.3. Gold particles from Au immobilized on SH-mod-Sur-3 68redAu(III)
2.7.1.4. Contact angle measurement of the modified-surfaces 71
2.7.2. 4-(dimethylamino)pyridine-stabilized-Gold (DMAP-stabilized-Gold) 72III
particles immobilized on the thiol-modified surfaces of films/tubes
2.7.2.1. DMAP-stabilized-gold particles immobilized on SH-mod-Sur-2 73
2.7.2.2. DMAP-stabilized-gold particles immobilized on SH-mod-Sur-3 76
2.7.2.3. Contact angle measurement of the modified-surfaces 77
2.7.3. Thiol-stabilized-gold particles immobilized on the thiol-modified 79
surfaces of films/tubes
2.7.3.1. Thiol-stabilized-gold particles immobilized on SH-mod-Sur-1 80
2.7.3.2. Thiol-stabilized-gold particles immobilized on SH-mod-Sur-2 81
2.7.3.3. Thiol-stabilized-gold particles immobilized on SH-mod-Sur-3 84
2.7.3.4. Contact angle measurement of the modified-surfaces 85
2.7.4. Immobilized gold particles at the ends of the tubes 86