Trace element status of activated charcoals and carbon black: Influence on thermal stability of modified lyocell solutions

Wendler, Frank; Lepri, Fábio G.; Borges, Daniel L. G.; Araújo, Rennan Geovanny Oliveira; Welz, Bernhard; Meister, Frank

doi:10.1002/app.31886

Cited by 5 publications

(1 citation statement)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…NMMO easily decomposes into N‐methylmorpholine (NMM), morpholine (M), formaldehyde and other by‐products in acidic environments; metal ions and high temperatures affect the production safety, solvent recovery and fibre quality 13‐15 . Research conducted by Wendler et al shows that some additives with high surface activity, acid groups or trace metal elements adversely affect the thermal stability of lyocell solution and reduce the effect of conventional stabilisers 16‐19 . A majority of previous studies have focused on the characterisation and mechanism of NMMO decomposition in the presence of reactive additives.…”

Section: Introductionmentioning

confidence: 99%

Influence of carbon black with different polar groups on the solvent N‐methylmorpholine N‐oxide

Jin

Kumi

Cui

et al. 2021

Coloration Technology

View full text Add to dashboard Cite

To confirm the effect of the surface property of carbon black (CB) on the lyocell process and the chemical stability of the solvent N‐methylmorpholine N‐oxide (NMMO), molecular dynamics simulation and ultraviolet tests were performed to investigate the interaction between aqueous NMMO solution and CB surfaces with different polar groups. The hydrophobic interaction between the O2 atom of NMMO and the unmodified CB surface increased with an increase in NMMO concentration. The interaction improved the dispersion of CB in aqueous NMMO solution, but this effect was not sufficient to prevent the aggregation between CB particles. Modifying the CB surface with a 1%‐3% carboxyl or amino group produced a stronger electrostatic interaction between the polar groups and the solvent molecules; however, the carboxyl group had a significant influence on the chemical stability of NMMO. The amino group can realise the stable dispersion of CB in aqueous NMMO solutions without affecting the chemical stability of NMMO, which would be the best choice for preparation of functional lyocell fibre.

show abstract

Section: Introductionmentioning

confidence: 99%

Influence of carbon black with different polar groups on the solvent N‐methylmorpholine N‐oxide

Jin

Kumi

Cui

et al. 2021

Coloration Technology

View full text Add to dashboard Cite

show abstract

High‐resolution Continuum Source Atomic Absorption Spectrometry—Theory and Applications

Welz

Vale

Florek

et al. 2010

Encyclopedia of Analytical Chemistry

View full text Add to dashboard Cite

High‐resolution continuum source atomic absorption spectrometry (HR‐CS AAS) is probably the most innovative technique in the field of atomic spectrometry since the introduction of inductively coupled plasma mass spectrometry (ICP‐MS) in the 1980s. Although it uses the basic principle of atomic absorption spectrometry (AAS), i.e. the absorption of radiation by atoms in the gas phase, HR‐CS AAS should not just be considered an improved AAS, but a new technique with an impressive number of new features. HR‐CS AAS is a new player in the field of atomic spectrometry and has to be compared with all the other techniques that are available. We give a short historical introduction about the development of HR‐CS AAS since the 1960s, although it was only in the 1990s, when components that are essential for the proper performance of this technique became available. Theoretical considerations are treated to the extent that is necessary to understand the basic difference between LS AAS (line source atomic absorption spectrometry) and HR‐CS AAS. This is followed by a comprehensive treatment of the instrumental details from the continuum radiation source over the high‐resolution monochromator to the array detector, giving also an insight into the essential control functions to guarantee troublefree operation. The special features of HR‐CS AAS are discussed in detail in order to make possible a comparison with the other techniques of atomic spectrometry. One of these features is the possibility to determine nonmetals, such as phosphorus, sulfur, and the halogens using molecular absorption “lines”. In Section 5, it is shown that HR‐CS AAS, in combination with a graphite tube atomizer, is probably the most rugged technique for trace‐element determination currently available.

show abstract

Preparation of Cu/OMMT/LLDPE nanocomposites and synergistic effect study of two different nano materials in polymer matrix

Xue

Xing

et al. 2011

Polym. Bull.

View full text Add to dashboard Cite

Trace element status of activated charcoals and carbon black: Influence on thermal stability of modified lyocell solutions

Cited by 5 publications

References 16 publications

Influence of carbon black with different polar groups on the solvent N‐methylmorpholine N‐oxide

Influence of carbon black with different polar groups on the solvent N‐methylmorpholine N‐oxide

High‐resolution Continuum Source Atomic Absorption Spectrometry—Theory and Applications

Preparation of Cu/OMMT/LLDPE nanocomposites and synergistic effect study of two different nano materials in polymer matrix

Contact Info

Product

Resources

About