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| Content Provider | Springer Nature Link |
|---|---|
| Author | Yang, Li li Zhang, Jin ming He, Jia song Zhang, Jun Gan, Zhi hua |
| Copyright Year | 2015 |
| Abstract | A new series of cellulose-graft-poly(N-isopropylacrylamide) (cellulose-g-PNIPAM) copolymers were prepared by atom transfer radical polymerization (ATRP) of N-isopropylacrylamide monomers from a cellulose-based macro-initiator, which was homogeneously synthesized in an ionic liquid 1-allyl-3-methylimidazolium chloride (AmimCl). The composition of cellulose-g-PNIPAM copolymers could be adjusted by altering the feeding ratio and reaction time. The resultant copolymers with relatively high content of PNIPAM segments (molar substitution of PNIPAM ≥ 18.3) were soluble in water at room temperature. Aqueous solutions of cellulose-g-PNIPAM copolymers exhibited clear temperature-sensitive behavior, and their sol-to-gel phase transition properties were investigated by dynamic light scattering (DLS) and UV measurements. Compared with pure PNIPAM, the cellulose-g-PNIPAM copolymers possessed higher lower critical solution temperatures (LCST) in a range from 36.9 °C to 40.8 °C, which are close to normal human body temperature, and could be tuned by adjusting the content of PNIPAM segments in copolymers. Spherical structure of cellulose-g-PNIPAM copolymers formed at temperatures above LCST and its morphology was observed by TEM and SEM. These novel cellulose-g-PNIPAM copolymers may be attractive substrates for some biomedical applications, such as drug release and tissue engineering. |
| Starting Page | 1640 |
| Ending Page | 1649 |
| Page Count | 10 |
| File Format | |
| ISSN | 02567679 |
| Journal | Chinese Journal of Polymer Science |
| Volume Number | 33 |
| Issue Number | 12 |
| e-ISSN | 14396203 |
| Language | English |
| Publisher | Chinese Chemical Society and Institute of Chemistry, CAS |
| Publisher Date | 2015-10-21 |
| Publisher Place | Beijing |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Cellulose-g-PNIPAM ATRP Temperature-sensitive Water soluble Polymer Sciences Industrial Chemistry/Chemical Engineering Characterization and Evaluation of Materials Condensed Matter Physics |
| Content Type | Text |
| Resource Type | Article |
| Subject | Organic Chemistry Chemical Engineering Polymers and Plastics |
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