Relevant bibliographies by topics / N-methyl-morpholine N-oxide

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Academic literature on the topic 'N-methyl-morpholine N-oxide'

Author: Grafiati
Published: 4 June 2021
Last updated: 15 February 2022

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Journal articles on the topic "N-methyl-morpholine N-oxide"

1

Potthast, A., T. Rosenau, P. Kosma, N. Schelosky, and T. Baldinger. "Thermal Reactions of N-Methyl-morpholine-N-oxide (NMMO): A General Method for Separation and Quantification of N-Methyl-morpholine-N-oxide and its Main Degradation Products N-Methylmorpholine and Morpholine by Capillary Electrophoresis (CE)." Holzforschung 54, no. 6 (October 25, 2000): 641–46. http://dx.doi.org/10.1515/hf.2000.108.

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Summary A general analytical method based on capillary electrophoresis with indirect UV detection has been developed to separate and quantify N-methylmorpholine-N-oxide (NMMO) and its main degradation products N-methylmorpholine (NMM) and morpholine (M). The electrolyte is based on the two major components 4-methylbenzylamine and 2-hydroxy-2-methylpropanoic acid (hydroxy-isobutyric acid, HIBA), the latter being used to adjust the pH to a value below 3.5 which is crucial for the electrophoretic mobility and, thus, for a good detectability of the amine oxide. The present method is widely applicable to monitor kinetics of reaction mixtures containing NMMO. NMM and M can be determined simultaneously even in a 1000-fold excess of NMMO. To monitor the fast and exothermic thermal degradation of NMMO by the electrophoretic method, special reaction conditions had to be developed for separating the initial decomposition step from super-imposed subsequent reactions. Reactive degradation products were removed by flushing with nitrogen, and the reaction rate was decreased by dilution with o-dichlorobenzene as an inert solvent. The initial phase of the decomposition reaction has been shown to follow second-order kinetics.
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2

Kim, Dong Bok, Wha Seop Lee, Seong Mu Jo, Young Moo Lee, and Byoung Chul Kim. "Phase Transition of Cellulose Solutions in N-Methyl Morpholine N-Oxide Hydrates." Polymer Journal 33, no. 1 (January 2001): 18–26. http://dx.doi.org/10.1295/polymj.33.18.

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3

Zhou, Shuang, Li Zhou, Ying Li, Fei Xie, He Li, Hui Yang, Wenjiang Li, and Rony Snyders. "Preparation of cellulose-graphene oxide aerogels with N -methyl morpholine-N -oxide as a solvent." Journal of Applied Polymer Science 135, no. 15 (December 27, 2017): 46152. http://dx.doi.org/10.1002/app.46152.

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4

Brøgger, Anja Funch, John Mitchell, Nagamani Koganti, Angelina Swali, and Sandra Hill. "Can pasting in N-methyl morpholine N-oxide (NMMO) differentiate between tapioca starches?" Starch - Stärke 67, no. 11-12 (September 18, 2015): 985–88. http://dx.doi.org/10.1002/star.201500084.

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5

Freddi, G., G. Pessina, and M. Tsukada. "Swelling and dissolution of silk fibroin (Bombyx mori) in N-methyl morpholine N-oxide." International Journal of Biological Macromolecules 24, no. 2-3 (March 1999): 251–63. http://dx.doi.org/10.1016/s0141-8130(98)00087-7.

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6

Farhat, Farhat, Giovanni Vitali, and Gianfrancesco Berchiesi. "Ternary system composed of H2O, N-methyl morpholine N-oxide and CF3COONa: Ultrasonic investigation." Journal of Molecular Liquids 59, no. 1 (January 1994): 59–64. http://dx.doi.org/10.1016/0167-7322(94)80010-3.

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7

Chanzy, H., M. Paillet, and R. Hagège. "Spinning of cellulose from N-methyl morpholine N-oxide in the presence of additives." Polymer 31, no. 3 (March 1990): 400–405. http://dx.doi.org/10.1016/0032-3861(90)90376-a.

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8

Zeng, Tong, Xun Ke, Lijuan Li, Xinlei Cheng, Yonghao Ni, Xinhua Ouyang, Xingye Zhang, Lihui Chen, Liulian Huang, and Hui-Chao Hu. "Quantification of N-methyl morpholine N-oxide in biorefinery process solution by headspace gas chromatography." Cellulose 27, no. 12 (May 29, 2020): 6861–70. http://dx.doi.org/10.1007/s10570-020-03259-7.

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9

Xu, Ying, Yaopeng Zhang, Huili Shao, and Xuechao Hu. "Solubility and rheological behavior of silk fibroin (Bombyx mori) in N-methyl morpholine N-oxide." International Journal of Biological Macromolecules 35, no. 3-4 (April 2005): 155–61. http://dx.doi.org/10.1016/j.ijbiomac.2004.11.008.

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10

Ramakrishnan, S., J. Collier, R. Oyetunji, B. Stutts, and R. Burnett. "Enzymatic hydrolysis of cellulose dissolved in N-methyl morpholine oxide/water solutions." Bioresource Technology 101, no. 13 (July 2010): 4965–70. http://dx.doi.org/10.1016/j.biortech.2009.09.002.

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More sources

Dissertations / Theses on the topic "N-methyl-morpholine N-oxide"

1

Li, Elizabeth Yau. "Enzymatic hydrolysis of pulp dissolved in n-methyl morpholine n-oxide and ionic liquids a comparative study /." Tallahassee, Fla. : Florida State University, 2010. http://purl.fcla.edu/fsu/lib/digcoll/undergraduate/honors-theses/2181923.

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Thesis (Honors paper)--Florida State University, 2010.
Advisor: Dr. Subramanian Ramakrishnan, Florida State University, College of Engineering, Dept. of Chemical & Biomedical Engineering. Includes bibliographical references.
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2

Quajai, Sirisart, and soj@kmitnb ac th. "Biopolymer Composite based on Natural and Derived Hemp Cellulose Fibres." RMIT University. Applied Sciences, 2006. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20061222.111612.

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The aim of this research was to study the effect of pre-treatment and modification processes on the properties of hemp cellulose fibre for biopolymer composites application. Hemp fibres have been modified by various extraction, swelling, chemical and enzymatic treatments. The morphology and mechanical properties of the modified fibres have been measured. Biopolymer composites have been prepared using the modified fibres and matrices of cellulose acetate butyrate and cellulose solutions derived from hemp. The first fibre treatment employed was acetone extraction and mercerization. A low pressure acrylonitrile grafting initiated by azo-bis-isobutylonitrile was performed using alkali treated fibre. The AN grafted fibres had no transformation of crystalline structure as observed after mercerization. The mechanical properties performed by a single fibre test method were strongly influenced by the cellulose structure, lateral index of crystallinity, and fraction of grafting. Bioscouring of hemp using pectate lyase (EC 4.2.2.2), Scourzyme L, was performed. Greater enzyme concentration and a longer treatment improved the removal of the low methoxy pectin component. Removal of pectate caused no crystalline transformation in the fibres, except for a slight decline in the X-ray crystalline order index. Smooth surfaces and separated fibres were evidence of successful treatment. The shortening of fibre by grinding and ball-milling was introduced to achieve a desired fibre size. An increase in the milling duration gradual ly destroyed the crystalline structure of the cellulose fibres. An increase in solvent polarity, solvent-fibre ratio, agitation speed and drying rate resulted in the rearrangement of the ball-milled cellulose crystalline structure to a greater order. The thermal degradation behaviour of hemp fibres was investigated by using TGA. The greater activation energy of treated hemp fibre compared with untreated fibre represented an increase in purity and improvement of structural order. The all hemp cellulose composites were prepared by an introduction of fibres into 12% cellulose N-methyl-morpholine N-oxide (NMMO) solution and water-ethanol regeneration. A broadening of the scattering of the main crystalline plane, (002) and a depression of the maximum degradation temperature of the fibres were observed. These revealed a structural change in the fibres arising from the preparation. The mechanical properties of composites depended on size, surface area, crystallinity and the structural swelling of the fibres. Composites of cellulose acetate butyrate (CAB) and modified hemp fibres were prepared. Composites containing pectate lyase enzyme treated fibres showed better mechanical property improvement than untreated and alkali treated fibres respectively.
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3

Tierney, John William. "Kinetics of cellulose dissolution in n-methyl morpholine-N-oxide and evaporative processes of similar solutions." 2005. http://etd.utk.edu/2005/TierneyJohn.pdf.

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