Laboratory of Textile Engineering, University of Monastir, ISET Ksar Hellal, B.P 68 Ksar Hellal, Tunisia.
Laboratory of Textile Engineering, University of Monastir, ISET Ksar Hellal, B.P 68 Ksar Hellal, Tunisia.
Carbohydr Polym. 2018 Apr 15;186:226-235. doi: 10.1016/j.carbpol.2018.01.030. Epub 2018 Jan 11.
This work aims to study the hydrogen bond energy and distance for different samples of alfa fibers treated with thymol. The treatment duration and thymol concentration were varied and seem to have a great influence on infrared band intensities and positions. The number of hydrogen bonds is related to the infrared band intensity, whereas their energy and distance depend on the infrared band position. It was proven that the free hydroxyl groups are weakened and tend to disappear with fiber treatment. It is the same for intermolecular hydrogen bands between cellulosic chains that present a decrease in both intensity and frequency. The two intramolecular hydrogen bands increase in intensity but exhibit different behaviors regarding the calculated energy: while the band at 3268 cm is weakened and shifted to higher wavenumbers, that at 3338 cm keeps the same peak position and energy.
本工作旨在研究用麝香草酚处理的不同阿尔法纤维样品的氢键能量和距离。处理时间和麝香草酚浓度有很大的变化，似乎对红外带强度和位置有很大的影响。氢键的数量与红外带强度有关，而它们的能量和距离取决于红外带的位置。证明游离羟基基团随着纤维处理而减弱并趋于消失。纤维素链之间的分子间氢键也是如此，其强度和频率都降低了。两个分子内氢键的强度增加，但在计算出的能量方面表现出不同的行为：在 3268cm-1 处的带被削弱并移向更高的波数，而在 3338cm-1 处的带保持相同的峰位置和能量。
