Xyloglucan is a natural polysaccharide having a cellulose-like backbone and hydroxyl groups-rich side-chains. In its native form the polymer is water-soluble and forms gel only in presence of selected co-solutes. When a given fraction of galactosyl residues are removed by enzymatic reaction, the polymer acquires the ability to form a gel in aqueous solution at physiological temperatures, a property of great interest for biomedical/pharmaceutical applications. This work presents data on the effect of a temperature increase on degalactosylated xyloglucan dispersed in water at concentration low enough not to run into macroscopic gelation. Results obtained over a wide interval of length scales show that, on increasing temperature, individual polymer chains and pre-existing clusters self-assemble into larger structures. The process implies a structural rearrangement over a few nanometers scale and an increase of dynamics homogeneity. The relation of these findings to coil-globule transition and phase separation is discussed.
|Numero di pagine||9|
|Rivista||JOURNAL OF POLYMER SCIENCE. PART B, POLYMER PHYSICS|
|Stato di pubblicazione||Published - 2015|
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Polymers and Plastics
- Materials Chemistry
Dispenza, C., Todaro, S., Sabatino, M. A., Ortore, M. G., San Biagio, P. L., Passantino, R., & Bulone, D. (2015). Temperature-induced self-assembly of degalactosylated xyloglucan at low concentration. JOURNAL OF POLYMER SCIENCE. PART B, POLYMER PHYSICS, 53, 1727-1735.