التفاصيل البيبلوغرافية
| العنوان: |
Grafting efficiency of synthetic polymers onto biomaterials: A comparative study of grafting-from versus grafting-to |
| المؤلفون: |
Hansson, Susanne, Trouillet, Vanessa, Tischer, Thomas, Goldmann, Anja, Carlmark, Anna, Barner-Kowollik, Christopher, Malmstrom, Eva |
| المصدر: |
Biomacromolecules |
| بيانات النشر: |
American Chemical Society |
| سنة النشر: |
2013 |
| المجموعة: |
Queensland University of Technology: QUT ePrints |
| مصطلحات موضوعية: |
ARGET ATRP, Acetylene, Activators regenerated by electron transfers, Atom transfer radical polymerization, Azide-alkyne cycloaddition, Biocompatible Materials, Biological materials, Cellulose, Cellulose substrates, Chemistry, Comparative studies, Contact angle, Enamels, Field emission scanning electron microscopy, Fourier transform infrared microscopies, Free polymers, Functionalized substrates, Grafting (chemical), Grafting efficiency, Grafting techniques, Grafting-to, High resolution, Pharmaceutical, Photoelectrons, Polymer content, Polymer grafts, Polymers, Substrates, Synthetic polymers, X ray photoelectron spectroscopy |
| الوصف: |
In the present study, the two grafting techniques grafting-from - by activators regenerated by electron transfer atom transfer radical polymerization (ARGET ATRP) - and grafting-to - by copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC) - were systematically compared, employing cellulose as a substrate. In order to obtain a meaningful comparison, it is crucial that the graft lengths of the polymers that are grafted from and to the substrates are essentially identical. Herein, this was achieved by utilizing the free polymer formed in parallel to the grafting-from reaction as the polymer for the grafting-to reaction. Four graft lengths were investigated, and the molar masses of the four free polymers (21 ≤ Mn ≤ 100 kDa; 1.07 ≤ M ≤ 1.26), i.e. the polymers subsequently employed in the grafting-to reaction, were shown to be in the same range as the molar masses of the polymers grafted from the surface (23 ≤ Mn ≤ 87 kDa; 1.08 ≤ M ≤ 1.31). The molecular weights of the chains grafted from the surface were established after cleavage from the cellulose substrates via size exclusion chromatography (SEC). High-resolution Fourier transform infrared microscopy (FT-IRM) was employed as an efficient tool to study the spatial distribution of the polymer content on the grafted substrates. In addition, the functionalized substrates were analyzed by X-ray photoelectron spectroscopy (XPS), contact angle (CA) measurements, and field-emission scanning electron microscopy (FE-SEM). For cellulose substrates modified via the grafting-from approach, the content of polymer on the surfaces increased with increasing graft length, confirming the possibility to tailor not only the length of the polymer grafts but also the polymeric content on the surface. In comparison, for the grafting-to reaction, the grafted content could not be controlled by varying the length of the preformed polymer: the polymer content was essentially the same for the four graft lengths. Consequently, the obtained results, when employing cellulose as a substrate ... |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
unknown |
| Relation: |
Hansson, Susanne, Trouillet, Vanessa, Tischer, Thomas, Goldmann, Anja, Carlmark, Anna, Barner-Kowollik, Christopher, & Malmstrom, Eva (2013) Grafting efficiency of synthetic polymers onto biomaterials: A comparative study of grafting-from versus grafting-to. Biomacromolecules, 14(1), pp. 64-74.; https://eprints.qut.edu.au/99351/; Institute for Future Environments; Science & Engineering Faculty |
| الاتاحة: |
https://eprints.qut.edu.au/99351/ |
| Rights: |
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| رقم الانضمام: |
edsbas.3FABAF3A |
| قاعدة البيانات: |
BASE |