Man–made cellulosics

Bredereck, Karl; Hermanutz, Frank

doi:10.1111/j.1478-4408.2005.tb00160.x

Cited by 114 publications

(133 citation statements)

References 50 publications

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“…The fibers exhibit high swelling in water (Bredereck and Hermanutz 2005), and due to that, woven fabrics made of the fiber are susceptible to the formation of permanent crease marks when processed in rope form (Burrow 1998). The fiber swelling in water causes the yarns to swell and push up against each other.…”

Section: Introductionmentioning

confidence: 99%

Alkali pretreatments and crosslinking of lyocell fabrics

et al. 2017

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Lyocell fabrics were pretreated with NaOH, KOH and LiOH and subsequently crosslinked with three urea-formaldehyde based crosslinkers DMDHEU, DMeDHEU and DMU. The mechanical properties varied with the alkali concentration in fabrics crosslinked after pretreatment with 2-8 mol/l NaOH and 4 mol/l LiOH. In fabrics crosslinked after pretreatment with 2-8 mol/l KOH and 1-3 mol/l LiOH, in contrast, the mechanical properties were relatively insensitive to the alkali concentration. The difference in effects is attributed to the alkali influence on the accessibility of crosslinker in fiber structures. The NaOH and 4 mol/l LiOH pretreatments increase the accessibility of crosslinker but the KOH and 1-3 mol/l LiOH pretreatments do not appear to change accessibilities to the same extent. The results underscore the importance of alkali choice and process control in the pretreatments of lyocell. Both NaOH and KOH may be used to good effect. However, lyocell is more sensitive to changes of alkali concentration in NaOH treatments as compared to KOH pretreatments. Thus, the use of NaOH in pretreatments of lyocell will require a greater degree of monitoring and control of alkali concentrations as compared to when KOH is used.

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Section: Introductionmentioning

confidence: 99%

Alkali pretreatments and crosslinking of lyocell fabrics

et al. 2017

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“…The viscose process involves chemical derivatisation of alkaliswollen cellulose with carbon disulphide, extrusion of the dope and then regeneration of the fibres in an aqueous sodium sulphate or zinc sulphate solution (Bredereck and Hermanutz 2005;Cook 1984;Wilding 1995). The viscose process is characterised by high consumption of water and generation of by-products, which clearly have a significant environmental impact.…”

Section: Introductionmentioning

confidence: 99%

Investigation into the removal of an easy-care crosslinking agent from cotton and the subsequent regeneration of lyocell-type fibres

2014

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Dimethylol dihydroxyethylene urea (DMDHEU)-treated cotton fabrics were treated with alkali or alternatively acid followed by alkali for increasing time periods, and their effectiveness in removing the crosslinking agent was investigated by surface (X-ray photoelectron spectroscopy) analysis, bulk analysis, crease recovery angle performance and solubility in specific solvents. The cellulose yield after the chemical stripping processes was established and the effect of the acid and alkali treatments on the degree of polymerisation of the resultant cellulose determined. Surface and bulk analyses and solubility tests suggested that alkali alone could not remove the DMDHEU from the crease-resist-treated cotton fabric. However, a sequential acid/alkali treatment effectively removed the easy-care finish from the cotton fabric and produced a commercially viable yield of cellulose.

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“…This method is based on a suitable extraction protocol and use of the fluorescent dye PicoGreen, which binds specifically to doublestranded DNA [Singer et al, 1997]. We have used this method to compare bacterial growth on different fabrics made of TENCEL , a rather recent type of a manmade cellulosic fiber [White, 2001], used to make textiles with special properties regarding comfort in wear [Bredereck and Hermanutz, 2005;Schuster et al, 2006], and of cotton, polyamide (PA), polyester (PES), and polypropylene (PP).…”

Section: Introductionmentioning

confidence: 99%

Development of a Fast and Reliable Method for the Assessment of Microbial Colonization and Growth on Textiles by DNA Quantification

Teufel¹,

Schuster

Merschak

et al. 2007

Microb Physiol

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There is a lack of relevant methods to assess the colonization of textiles by skin bacteria because present methods are mainly culture-based procedures. Therefore, the goal of this study was to develop a fast and sensitive culture-independent procedure for the quantification of microbial colonization and growth on textiles. We have established a suitable protocol to use DNA quantification as a reliable method for in vitroand in vivoinvestigations of textiles. For DNA extraction, a two-step procedure comprising treatment of the textile with a solution containing Triton X-100 and lysozyme for 1 h and a successive treatment by SDS and proteinase K for 2 h turned out to be most efficient. DNA extracted from textiles and fabrics was than quantified with the highly sensitive PicoGreen fluorescent dye. In vitrochallenge tests demonstrated a strong correlation between numbers of bacteria on textiles and amount of DNA extracted from textiles. Therefore, this method was used to compare different materials after in vivotrials for assessment of their susceptibility for microbial colonization and growth.

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Man–made cellulosics

Cited by 114 publications

References 50 publications

Alkali pretreatments and crosslinking of lyocell fabrics

Alkali pretreatments and crosslinking of lyocell fabrics

Investigation into the removal of an easy-care crosslinking agent from cotton and the subsequent regeneration of lyocell-type fibres

Development of a Fast and Reliable Method for the Assessment of Microbial Colonization and Growth on Textiles by DNA Quantification

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