TY  - JOUR
AU  - Siroka, Barbora
AU  - Manian, Avinash P.
AU  - Noisternig, Michael F.
AU  - Henniges, Ute
AU  - Kostić, Mirjana
AU  - Potthast, Antje
AU  - Griesser, Ulrich J.
AU  - Bechtold, Thomas
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2143
AB  - Three regenerated cellulosic fiber types: lyocell, viscose, and modal were subjected to repetitive wetdry treatments. Simulated treatments showed reorganization of the internal fiber structure which could be determined by accessibility studies. The reduction in liquid water retention capacity was found to be greater for lyocell than that for modal and viscose, sorption of iodine, and water vapor reduced for all studied fibers. The wetdry treatment did not have influence on chemical reactivity of cellulosic fibers characterized by complexation of iron under highly alkaline conditions. The effect of wetdry treatment on the tenacity, elongation at break, abrasion resistance, and molecular weight distribution of fibers was also explored in this study. The reduced strength in treated specimens was not accompanied by changes in molecular weight distributions. Based on these results, the changes observed in wetdry-treated specimens were observed mainly owing to polymer reorganization in amorphous parts of the fibers.
PB  - Wiley-Blackwell, Hoboken
T2  - Journal of Applied Polymer Science
T1  - Wash-dry cycle induced changes in low-ordered parts of regenerated cellulosic fibers
EP  - E407
SP  - E396
VL  - 126
DO  - 10.1002/app.36894
ER  - 

@article{
author = "Siroka, Barbora and Manian, Avinash P. and Noisternig, Michael F. and Henniges, Ute and Kostić, Mirjana and Potthast, Antje and Griesser, Ulrich J. and Bechtold, Thomas",
year = "2012",
abstract = "Three regenerated cellulosic fiber types: lyocell, viscose, and modal were subjected to repetitive wetdry treatments. Simulated treatments showed reorganization of the internal fiber structure which could be determined by accessibility studies. The reduction in liquid water retention capacity was found to be greater for lyocell than that for modal and viscose, sorption of iodine, and water vapor reduced for all studied fibers. The wetdry treatment did not have influence on chemical reactivity of cellulosic fibers characterized by complexation of iron under highly alkaline conditions. The effect of wetdry treatment on the tenacity, elongation at break, abrasion resistance, and molecular weight distribution of fibers was also explored in this study. The reduced strength in treated specimens was not accompanied by changes in molecular weight distributions. Based on these results, the changes observed in wetdry-treated specimens were observed mainly owing to polymer reorganization in amorphous parts of the fibers.",
publisher = "Wiley-Blackwell, Hoboken",
journal = "Journal of Applied Polymer Science",
title = "Wash-dry cycle induced changes in low-ordered parts of regenerated cellulosic fibers",
pages = "E407-E396",
volume = "126",
doi = "10.1002/app.36894"
}

Siroka, B., Manian, A. P., Noisternig, M. F., Henniges, U., Kostić, M., Potthast, A., Griesser, U. J.,& Bechtold, T.. (2012). Wash-dry cycle induced changes in low-ordered parts of regenerated cellulosic fibers. in Journal of Applied Polymer Science
Wiley-Blackwell, Hoboken., 126, E396-E407.
https://doi.org/10.1002/app.36894

Siroka B, Manian AP, Noisternig MF, Henniges U, Kostić M, Potthast A, Griesser UJ, Bechtold T. Wash-dry cycle induced changes in low-ordered parts of regenerated cellulosic fibers. in Journal of Applied Polymer Science. 2012;126:E396-E407.
doi:10.1002/app.36894 .

Siroka, Barbora, Manian, Avinash P., Noisternig, Michael F., Henniges, Ute, Kostić, Mirjana, Potthast, Antje, Griesser, Ulrich J., Bechtold, Thomas, "Wash-dry cycle induced changes in low-ordered parts of regenerated cellulosic fibers" in Journal of Applied Polymer Science, 126 (2012):E396-E407,
https://doi.org/10.1002/app.36894 . .

TY  - JOUR
AU  - Henniges, Ute
AU  - Kostić, Mirjana
AU  - Borgards, Andrea
AU  - Rosenau, Thomas
AU  - Potthast, Antje
PY  - 2011
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1921
AB  - Celluloses from different origins were dissolved stepwise in N,N-dimethylacetamide/lithium chloride (9% v/w; DMAc/LiCl) with the aim to study the time course of the dissolution process, Completeness of dissolution in the dissolved fractions, possible discrimination effects, and differences between the celluloses. Cellulosic pulps from both annual plants and different wood species were analyzed. The obtained fractions were subject to gel permeation chromatography (GPC) with multiple detection to monitor the development of molecular mass distribution (MMD), molecular mass, and recovered mass. The dissolution behavior of accompanying xylans was followed by quantitative analysis of the uronic acids by fluorescence. labeling - GPC. The morphological changes at the remaining fibers in the stepwise dissolution were addressed by SEM. The time needed to dissolve completely the cellulosic pulp differed from species to species, mainly, between pulps from annual plants and pulps from wood. Annual plants generally needed much longer to dissolve completely. In the beginning of the dissolution, the dissolved fractions of annual plants showed a distinct discrimination effect because they were enriched in hemicellulose. By contrast, wood pulps dissolve fast and without distinct changes in the MMD of the dissolved fractions over time. Bagasse pulp is an exception the observation for annual plants and rather resembled the behavior of wood celluloses. Prolonged dissolution times, as often practiced in Cellulose GPC, do not lead to any improvements regarding the determination of molecular mass, MMD, and recovered, Mass of injected sample, so that the dissolution times required for reliable GPC analysis can be significantly shortened, which will he important for biorefinery analytics with high numbers of samples
PB  - Amer Chemical Soc, Washington
T2  - Biomacromolecules
T1  - Dissolution Behavior of Different Celluloses
EP  - 879
IS  - 4
SP  - 871
VL  - 12
DO  - 10.1021/bm101555q
ER  - 

@article{
author = "Henniges, Ute and Kostić, Mirjana and Borgards, Andrea and Rosenau, Thomas and Potthast, Antje",
year = "2011",
abstract = "Celluloses from different origins were dissolved stepwise in N,N-dimethylacetamide/lithium chloride (9% v/w; DMAc/LiCl) with the aim to study the time course of the dissolution process, Completeness of dissolution in the dissolved fractions, possible discrimination effects, and differences between the celluloses. Cellulosic pulps from both annual plants and different wood species were analyzed. The obtained fractions were subject to gel permeation chromatography (GPC) with multiple detection to monitor the development of molecular mass distribution (MMD), molecular mass, and recovered mass. The dissolution behavior of accompanying xylans was followed by quantitative analysis of the uronic acids by fluorescence. labeling - GPC. The morphological changes at the remaining fibers in the stepwise dissolution were addressed by SEM. The time needed to dissolve completely the cellulosic pulp differed from species to species, mainly, between pulps from annual plants and pulps from wood. Annual plants generally needed much longer to dissolve completely. In the beginning of the dissolution, the dissolved fractions of annual plants showed a distinct discrimination effect because they were enriched in hemicellulose. By contrast, wood pulps dissolve fast and without distinct changes in the MMD of the dissolved fractions over time. Bagasse pulp is an exception the observation for annual plants and rather resembled the behavior of wood celluloses. Prolonged dissolution times, as often practiced in Cellulose GPC, do not lead to any improvements regarding the determination of molecular mass, MMD, and recovered, Mass of injected sample, so that the dissolution times required for reliable GPC analysis can be significantly shortened, which will he important for biorefinery analytics with high numbers of samples",
publisher = "Amer Chemical Soc, Washington",
journal = "Biomacromolecules",
title = "Dissolution Behavior of Different Celluloses",
pages = "879-871",
number = "4",
volume = "12",
doi = "10.1021/bm101555q"
}

Henniges, U., Kostić, M., Borgards, A., Rosenau, T.,& Potthast, A.. (2011). Dissolution Behavior of Different Celluloses. in Biomacromolecules
Amer Chemical Soc, Washington., 12(4), 871-879.
https://doi.org/10.1021/bm101555q

Henniges U, Kostić M, Borgards A, Rosenau T, Potthast A. Dissolution Behavior of Different Celluloses. in Biomacromolecules. 2011;12(4):871-879.
doi:10.1021/bm101555q .

Henniges, Ute, Kostić, Mirjana, Borgards, Andrea, Rosenau, Thomas, Potthast, Antje, "Dissolution Behavior of Different Celluloses" in Biomacromolecules, 12, no. 4 (2011):871-879,
https://doi.org/10.1021/bm101555q . .