https://scholars.lib.ntu.edu.tw/handle/123456789/406731
Title: | £]-Chitin nanofibrils for self-sustaining hydrogels preparation via hydrothermal treatment | Authors: | Nata I.F. Wang S.S.-S. Wu T.-M. Lee C.-K. |
Keywords: | £]-Chitin;Chitin nanofibrils;Hydrogels;Hydrothermal;Squid pen | Issue Date: | 2012 | Journal Volume: | 90 | Journal Issue: | 4 | Start page/Pages: | 1509-1514 | Source: | Carbohydrate Polymers | Abstract: | A transparent nanofibril suspension could be readily obtained by treating purified squid pen powder in water with ultrasonic irradiation. The obtained suspension is consisted of £]-chitin nanofibrils (CNF) with 3-10 nm in width and several micrometers in length. The degree of acetylation (DA) of CNF was found to be 84% which is about 10% lower than that of untreated sample. The CNF suspension could be transformed into a durable 3-D hydrogels (CH) by simply heating to 180 ¢XC for 1-4 h in an autoclave. Hydrophobic interaction between CNF was believed to play the major role for CNF self-assembling into hydrogels, since the as-prepared chitin hydrogels readily dissolved in a typical chaotropic solution (8 M urea) under room temperature. The hydrothermal duration and CNF concentration (0.3-2% (w/v)) strongly affected the physical properties of CH. The suspension of 1% (w/v) CNF treated with 4 h, 180 ¢XC hydrothermal heating generated a CH with 99.3% water content, CNF with 87% crystallinity and an mechanical strength of 0.7 N breaking force. ? 2012 Elsevier Ltd. All rights reserved. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/406731 | ISSN: | 01448617 | DOI: | 10.1016/j.carbpol.2012.07.022 |
Appears in Collections: | 化學工程學系 |
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