| Title |
Synthesis and characterization of acenaphthylene labelled chitosan-graft-poly(N-isopropylacrylamide) copolymers / |
| Authors |
Babelyte, Migle ; Rutkaite, Ramune ; Liudvinaviciute, Dovile ; Navikaite-Snipaitiene, Vesta ; Samaryk, Volodymyr |
| DOI |
10.15388/IOR2023 |
| ISBN |
9786090708835 |
| Full Text |
|
| Is Part of |
Open readings 2023: 66th international conference for students of physics and natural sciences, April 18-21, 2023, Vilnius, Lithuania: annual abstract book / editors: M. Keršys, Š. Mickus.. Vilnius : Vilnius University press, 2023. p. 175.. ISBN 9786090708835 |
| Abstract [eng] |
Chitosan (CS) is non-toxic, biodegradable, biocompatible, pH-sensitive, inexpensive natural biopolymer. It can be also easily modified via grafting reactions. One of the most attractive compounds which can be used for grafting of chitosan is N-isopropylacrylamide (NIPAAm). Poly(N-isopropylacrylamide) (PNIPAAm) is highly thermo-sensitive polymer which shows sharp solubility changes in aqueous solutions around a lower critical solution temperature (LCST). PNIPAAm undergoes a sharp transition from coil to globule in water at 32 °C, changing from a hydrophilic state below this temperature to a hydrophobic state above it. Beyond 32 °C PNIPAAm turns into precipitate and could be dissolved again by lowering the solution temperature. Moreover, acenaphthylene (ACE) could be also introduced into PNIPAAm grafts and serve as a fluorescent marker for more detailed investigation of thermoresponsive behavior of synthesized copolymers. In this study, ACE labelled chitosan-graft-poly(N-isopropylacrylamide) (CS-g-PNIPAAm-ACE) copolymers were synthesized by free-radical polymerization of CS, NIPAAm and ACE in aqueous solution using potassium persulfate (PPS) as an initiator and thermoresponsive properties of the prepared copolymers were investigated. CS-g-PNIPAAm- ACE copolymers were synthesized as shown in the scheme (Fig. 1). By changing the molar ratio of the reagents two ACE labelled graft copolymers of different composition were prepared. The reaction conditions and feed molar ratio of the reagents are presented in the Table 1. [...]. |
| Published |
Vilnius : Vilnius University press, 2023 |
| Type |
Conference paper |
| Language |
English |
| Publication date |
2023 |
| CC license |
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