Titlebar

Export bibliographic data
Literature by the same author
plus on the publication server
plus at Google Scholar

 

Direct Thiol-Ene Photocoating of Polyorganosiloxane Microparticles

Title data

Kuttner, Christian ; Maier, Petra C. ; Kunert, Carmen ; Schlaad, Helmut ; Fery, Andreas:
Direct Thiol-Ene Photocoating of Polyorganosiloxane Microparticles.
In: Langmuir. Vol. 29 (December 2013) Issue 52 . - pp. 16119-16126.
ISSN 1520-5827
DOI: https://doi.org/10.1021/la4039864

Official URL: Volltext

Abstract in another language

This work presents the modification of polyorga- nosiloxane microparticles by surface-initiated thiol−ene photochemistry. By this photocoating, we prepared different core/shell particles with a polymeric shell within narrow size distributions (PDI = 0.041−0.12). As core particle, we used highly monodisperse spherical polyorganosiloxane particles prepared from (3-mercaptopropyl)trimethoxysilane (MPTMS) with a radius of 0.49 μm. We utilize the high surface coverage of mercaptopropyl functions to generate surface-localized radicals upon irradiation with UVA-light without additional photoinitiator. The continuous generation of radicals was followed by a dye degradation experiment (UV/vis spectroscopy). Surface-localized radicals were used as copolymer anchoring sites ("grafting- onto" deposition of different PB-b-PS diblock copolymers) and polymerization initiators ("grafting-from" polymerization of PS). Photocoated particles were characterized for their morphology (SEM, TEM), size, and size distribution (DLS). For PS-coated particles, the polymer content (up to 24 in 24 h) was controlled by the polymerization time upon UVA exposure. The coating thickness was evaluated by thermogravimetric analysis (TGA) using a simple analytical core/shell model. Raman spectroscopy was applied to directly follow the time-dependent consumption of thiols by photoinitiation.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Former Professors > Chair Physical Chemistry II - Univ.-Prof. Dr. Andreas Fery
Research Institutions > EU Research Projects > METAMECH - Template Assisted Assembly of Meta-Materials Using Mechanical Instabilities
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Physical Chemistry II
Research Institutions
Research Institutions > EU Research Projects
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Former Professors
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 500 Natural sciences
500 Science > 530 Physics
500 Science > 540 Chemistry
Date Deposited: 05 Dec 2014 10:48
Last Modified: 07 Mar 2016 15:30
URI: https://eref.uni-bayreuth.de/id/eprint/3930