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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Kalliola, Simo Repo, Eveliina Srivastava, Varsha Heiskanen, Juha P. Sirviö, Juho Antti Liimatainen, Henrikki Sillanpää, Mika |
| Description | Author Affiliation: Kalliola S ( Lappeenranta University of Technology, Sammonkatu 12, Mikkeli FI-50130, Finland. Electronic address: simo.kalliola@lut.fi.); Repo E ( Lappeenranta University of Technology, Sammonkatu 12, Mikkeli FI-50130, Finland.); Srivastava V ( Lappeenranta University of Technology, Sammonkatu 12, Mikkeli FI-50130, Finland.); Heiskanen JP ( Research Unit of Sustainable Chemistry, University of Oulu, P.O. Box 3000, FI-90014, Finland.); Sirviö JA ( Fibre and Particle Engineering Research Unit, University of Oulu, P.O. Box 4300, FI-90014, Finland.); Liimatainen H ( Fibre and Particle Engineering Research Unit, University of Oulu, P.O. Box 4300, FI-90014, Finland.); Sillanpää M ( Lappeenranta University of Technology, Sammonkatu 12, Mikkeli FI-50130, Finland) |
| Abstract | In environmental applications the applied materials are required to be non-toxic and biodegradable. Carboxymethyl chitosan nanoparticles cross-linked with Ca ions (CMC-Ca) fulfill these requirements, and they are also renewable. These nanoparticles were applied to oil-spill treatment in our previous study and here we focused on enhancing their properties. It was found that while the divalent Ca ions are crucial for the formation of the CMC-Ca, the attractive interaction between NH and COO groups contributed significantly to the formation and stability of the CMC-Ca. The stability decreased as a function of pH due to the deprotonation of the amino groups. Therefore, the nanoparticles were found to be fundamentally pH sensitive in solution, if the pH deviated from the pH (7-9) that was used in the synthesis of the nanoparticles. The pH sensitive CMC-Ca synthesized in pH 7 and 8 were most stable in the studied conditions and could find applications in oil-spill treatment or controlled-release of substances. |
| File Format | HTM / HTML |
| ISSN | 09277765 |
| Journal | Colloids and Surfaces B: Biointerfaces |
| Volume Number | 153 |
| e-ISSN | 18734367 |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2017-02-21 |
| Publisher Place | Netherlands |
| Access Restriction | One Nation One Subscription (ONOS) |
| Content Type | Text |
| Resource Type | Article |
| Subject | Colloid and Surface Chemistry Medicine Physical and Theoretical Chemistry Surfaces and Interfaces Biotechnology |
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