Results 171 to 180 of about 426,028 (222)

Homogeneous alkalization of cellulose in N-methylmorpholine-N-oxide/water solution

Cellulose, 2017
Alkali cellulose is an important intermediate in the production of cellulose derivatives. N-methylmorpholine-N-oxide (NMMO)/H2O was used as a homogeneous reaction medium for the cellulose alkalization process to intensify the alkalization degree and improve the substitution uniformity.
Yong Zhang, Shengwei Tang, Tao Zhang
openaire   +1 more source

Determination of Cellulose, Water, and N-Methylmorpholine N-Oxide during the Production of Lyocell by Attenuated Total Reflection (ATR) – Fourier Transform Infrared (FTIR) Spectroscopy

Analytical Letters, 2021
Attenuated total reflection (ATR) – Fourier transform infrared (FTIR) spectroscopy with the pretreatment of converting the absorption spectrum into angle spectrum (CASAS) and partial least squares (PLS) was employed to rapidly and simultaneously ...
Xuebing Luo, Hongfu Yuan, Chunfeng Song, Yan Meng, Xiaoyu Li   +4 more
semanticscholar   +1 more source

Rheological properties of concentrated cellulose solutions in N-methylmorpholine-N-oxide

Fibre Chemistry, 1990
-- Rheological properties of concentrated solutions of cellulose in N-mcthylmorpholine-N-oxide on varying the concentration of cellulose in the solution from 10 to 28% by wt. have been studied. -- It has been found that on increasing the cellulose content of the solution, the viscoelastic properties of the solution qualitatively change.
L. P. Braverman, V. V. Romanov, O. B. Lunina, T. P. Belasheva, G. G. Finger   +4 more
openaire   +1 more source

Cellulose‐based polymer blend filaments spun from N‐methylmorpholine‐N‐oxide

Die Angewandte Makromolekulare Chemie, 1996
AbstractThe influence of a small addition (<15 wt.‐%) of an aromatic polyamide [poly(2,6‐dichloro‐1,4‐phenylene terephthalamide) (P26C1PTA)] as additive on the textile‐physical properties of cellulose filaments was investigated. The blend filaments were spun from homogeneous blend solutions prepared in the common solvent N‐methylmorpholine‐N‐oxide ...
Bernd Morgenstern, Olaf Leillinger, Reinhard Maron   +2 more
openaire   +1 more source

Spectral features of the N-methylmorpholine-N-oxide-water-cellulose system

Polymer Science U.S.S.R., 1986
Abstract The spectral featuresof N-methylmorpholine-N-oxide (MMO) — a solvent for cellulose — have been studied. Temperature studies show that the IR-spectroscopic features of the phase state of the hydrated and anyydride forms of MMO disappear in the melt state.
T.A. Belousova, M.V. Shablygin, Yu.Ya. Belousov, L.K. Golova, S.P. Papkov   +4 more
openaire   +1 more source

Structure of Polyacrylonitrile Fibers Produced from N-Methylmorpholine-N-Oxide Solutions

Fibre Chemistry, 2019
Structural and morphological evolution of polyacrylonitrile (PAN) samples from starting powder of a ternary copolymer to fibers produced from concentrated solutions of PAN in N-methylmorpholine-N-oxide (NMMO) was studied using x-ray diffraction for the first time. X-ray exposures in transmission and reflection geometries allowed the structures of outer
I. S. Makarov, L. K. Golova, M. I. Vinogradov, I. S. Levin, S. E. Sorokin   +4 more
openaire   +1 more source

Relaxation phenomena in water - n-methylmorpholin n-oxide binary mixtures

Journal of Molecular Liquids, 1988
Abstract Binary mixtures composed of water and N-methylmorpholin N-oxide (NMMNO) were studied in the concentration range 0.19 m to 26.5 m with shear and longitudinal waves. The dependence on temperature and molality of 1)the ultrasonic spectrum, 2)the real part of the complex mechanical impedance and 3)the ultrasonic velocity indicates equilibrium ...
openaire   +1 more source

A self-stiffness finishing for cotton fabric with N-methylmorpholine-N-oxide

Cellulose, 2015
In this study, the surface layer of cotton fabric was swelled with N-methylmorpholine-N-oxide with 18 % water content, washed and dried to improve its stiffness property. Finally, the finished fabric had no auxiliaries and self-stiffened. The results showed that the bending rigidity increased from 0.75 × 105 to 1.57 × 105 mN cm, the acute elastic ...
Fang Xu, Yulian Yang, Guangxian Zhang, Fengxiu Zhang, Yuansong Zhang   +4 more
openaire   +1 more source

Phase diagram of a cellulose solvent: N-methylmorpholine–N-oxide–water mixtures

Polymer, 2003
Abstract The phase diagram of the N -methylmorpholine– N -oxide–H 2 O mixtures from 0 to 100% has been determined. Three crystalline hydrates have been identified, the already known monohydrate, a dihydrate and a hydrate composed of 8 water molecules per NMMO.
Biganska, Olga, Navard, Patrick
openaire   +2 more sources

Fabrication of water-dispersible single-walled carbon nanotube powder using N-methylmorpholine N-oxide

Nanotechnology, 2017
Dispersion of nanocarbon materials in liquid media, via solution processing such as spraying, printing, spinning, etc. is one of the prerequisites for practical applications. Here we report that water-dispersible single-walled carbon nanotubes (SWCNTs) were prepared through successive treatments with chlorosulfuric acid (CSA)/H2O2 and N ...
Hyejun, Choi, Jong, Seok Woo, Joong, Tark Han, Soo-Young, Park   +3 more
openaire   +2 more sources