Stability of cotton fibers oxidized by the 2,2,6,6-tetramethylpiperidine-1-oxy radical (TEMPO)-mediated system during natural aging was monitored; the oxidized and five-year-aged fibers were characterized in terms of molecular weight distribution, quantity and distribution of functionalities, tensile strength, color difference, and yellowness index. The distribution of functionalities introduced in cotton fibers by TEMPO-mediated oxidation and subsequent aging was investigated by means of gel permeation chromatography using multiple detection and group-selective labeling. The mild TEMPO-mediated oxidation retains the molar mass of oxidized cotton, but this status is not stable during natural aging. For highly oxidized cotton, the molar mass of aged fibers is low but stable. Aged TEMPO-oxidized cotton shows a prominent discoloration and an increased yellowness index. For tensile strength, the limiting value was obtained for aged TEMPO-oxidized cotton, regardless of whether the samples h...ad initially been oxidized with a low or high degree of oxidation.
Keywords:
TEMPO-oxidized cotton / Aging / Functional group contents and profiles / Molecular weight distribution / Tensile strength / Yellowing
TY - JOUR
AU - Milanović, Jovana
AU - Schiehser, Sonja
AU - Potthast, Antje
AU - Kostić, Mirjana
PY - 2020
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4347
AB - Stability of cotton fibers oxidized by the 2,2,6,6-tetramethylpiperidine-1-oxy radical (TEMPO)-mediated system during natural aging was monitored; the oxidized and five-year-aged fibers were characterized in terms of molecular weight distribution, quantity and distribution of functionalities, tensile strength, color difference, and yellowness index. The distribution of functionalities introduced in cotton fibers by TEMPO-mediated oxidation and subsequent aging was investigated by means of gel permeation chromatography using multiple detection and group-selective labeling. The mild TEMPO-mediated oxidation retains the molar mass of oxidized cotton, but this status is not stable during natural aging. For highly oxidized cotton, the molar mass of aged fibers is low but stable. Aged TEMPO-oxidized cotton shows a prominent discoloration and an increased yellowness index. For tensile strength, the limiting value was obtained for aged TEMPO-oxidized cotton, regardless of whether the samples had initially been oxidized with a low or high degree of oxidation.
PB - Elsevier Sci Ltd, Oxford
T2 - Carbohydrate Polymers
T1 - Stability of TEMPO-oxidized cotton fibers during natural aging
VL - 230
DO - 10.1016/j.carbpol.2019.115587
ER -
@article{
author = "Milanović, Jovana and Schiehser, Sonja and Potthast, Antje and Kostić, Mirjana",
year = "2020",
abstract = "Stability of cotton fibers oxidized by the 2,2,6,6-tetramethylpiperidine-1-oxy radical (TEMPO)-mediated system during natural aging was monitored; the oxidized and five-year-aged fibers were characterized in terms of molecular weight distribution, quantity and distribution of functionalities, tensile strength, color difference, and yellowness index. The distribution of functionalities introduced in cotton fibers by TEMPO-mediated oxidation and subsequent aging was investigated by means of gel permeation chromatography using multiple detection and group-selective labeling. The mild TEMPO-mediated oxidation retains the molar mass of oxidized cotton, but this status is not stable during natural aging. For highly oxidized cotton, the molar mass of aged fibers is low but stable. Aged TEMPO-oxidized cotton shows a prominent discoloration and an increased yellowness index. For tensile strength, the limiting value was obtained for aged TEMPO-oxidized cotton, regardless of whether the samples had initially been oxidized with a low or high degree of oxidation.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Carbohydrate Polymers",
title = "Stability of TEMPO-oxidized cotton fibers during natural aging",
volume = "230",
doi = "10.1016/j.carbpol.2019.115587"
}
Milanović, J., Schiehser, S., Potthast, A.,& Kostić, M.. (2020). Stability of TEMPO-oxidized cotton fibers during natural aging. in Carbohydrate Polymers
Elsevier Sci Ltd, Oxford., 230.
https://doi.org/10.1016/j.carbpol.2019.115587
Milanović J, Schiehser S, Potthast A, Kostić M. Stability of TEMPO-oxidized cotton fibers during natural aging. in Carbohydrate Polymers. 2020;230.
doi:10.1016/j.carbpol.2019.115587 .
Milanović, Jovana, Schiehser, Sonja, Potthast, Antje, Kostić, Mirjana, "Stability of TEMPO-oxidized cotton fibers during natural aging" in Carbohydrate Polymers, 230 (2020),
https://doi.org/10.1016/j.carbpol.2019.115587 . .
