2 edition of infrared spectroscopic study of the oxidation of cellulose. found in the catalog.
infrared spectroscopic study of the oxidation of cellulose.
Bernard Isaac Friedlander
Written in English
|Contributions||Toronto, Ont. University.|
|The Physical Object|
|Number of Pages||197|
A study is presented based on the use of entirely non-destructive spectroscopic techniques to analyze the chemical composition of the painted surface layer of archaeological pottery. Raw naturally coloured and white cotton cellulose fibres were investigated by Fourier transform near-infrared (FT-NIR) spectroscopy and chemometric methods, namely principal component analysis (PCA). In general, the white cotton exhibited bands that could be .
TEMPO (2,2,6,6-tetramethylpiperidineoxylradical)-mediated oxidation nanofibers (TOCNF), as a biocompatible and bioactive material, have opened up a new application of nanocellulose for the removal of water contaminants. This development demands extremely sensitive and accurate methods to understand the su. 3 Fourier Transform Infrared Spectroscopy for Natural Fibres Mizi Fan 1,2, Dasong Dai 1,2 and Biao Huang 2 1Department of Civil Engineering, Brunel University, London, UB8 3PH, 2School of Material and Engineering, Fu jian Agricultural and Forestry University, 1UK 2P. R. China 1. Introduction Infrared spectroscopy is nowadays one of the most important analytical techniques.
Furthermore, lignocellulosic materials can undergo more or less strong oxidation processes depending on the age of the manuscript, the source of the plant, the manufacturing processes, and the external environmental conditions. 2 Recently, many analytical techniques have been used not only to evaluate the chemical composition of different historical artifacts but also to determine . This book provides practical information on the use of infrared (IR) spectroscopy for the analysis of materials found in cultural objects. Designed for scientists and students in the fields of archaeology, art conservation, microscopy, forensics, chemistry, and optics, the book discusses techniques for examining the microscopic amounts of complex, aged components in objects such as paintings.
In the House of representatives of the United States, Sixty-first Congress: contested election case of John M. Parsons, contestant, v. Edward W. Saunders, contestee, from the fifth Congressional district of Virginia
Directory of state and federal agencies in Ohio operating in the social fields of education, health and public welfare.
quasi-experimental study of the effects of fast for word and recipe for reading on central auditory processing and phonological processing defecits among learning disabled and language-disabled reading students in grades one through six
The singular Miss Smith
Law on protection of personal & official information in India
Edith L. Bickford.
liberal education in a modern world
The colonial clergy of the Middle Colonies
The Frankenstein file
Christopher Reeve Scrapbook
This monograph is concerned with systematization of the infrared spectra of an important natural polymer, cellulose, and its derivatives. The infrared spectra of the main classes of cellulose derivatives are de scribed and interpreted and those of such model compounds as mono- di- and trisaccharides are considered.
Infrared spectroscopic study of cellulose nitrate solutions Raising the number of nitro-ether groups simultaneously with a line intensity increase causes its shift towards the short-wave range.
The molar extinction and integral absorption coefficients of Cited by: 3. Study on Temperature-Dependent Changes in Hydrogen Bonds in Cellulose Iβ by Infrared Spectroscopy with Perturbation-Correlation Moving-Window Two-Dimensional Correlation Spectroscopy. Biomacromolecules7 (11), DOI: /bmCited by: Infrared spectroscopic and dielectric studies of swollen cellulose.
Nada. Search for more papers by this author Synthesis of bacterial cellulose using hot water extracted wood sugars, Carbohydrate PolymersInfrared spectroscopic study of γ-irradiated cotton linters, Polymer Degradation and Stability, 31, 3. In this paper, we use Fourier transform infrared (FTIR) spectroscopy and stripping voltammetry at saturation and submonolayer CO coverages to shed light on the influence of size on the CO adsorption and electro-oxidation on Pt nanoparticles.
Pt nanoparticles supported on low surface area (∼1 m 2 g-1) carbon (Sibunit) are used throughout the. Anisotropy of nuclear magnetic resonance spectra CONCLUSIONS (1) A study has been made of the infrared spectra of the products of graft copolymerization of cellulose acetates (CA) and polymethylvinylpyridine, prepared by different methods.
(2) Chemical bonding between the PMVP and CA is by: 2. This paper reports the results of initial experiments to assess the use of infrared spectroscopy to monitor the ageing of cellulose. Cellulose has been widely studied by Fourier transform infrared (FTIR), and many of the adsorption peaks can be assigned to specific bond vibrations .Cited by: The interface of electrodes composed of 2, 3, or 5 monolayers (MLs) of graphene stacked on a Si prism in M HClO4 is examined by electrochemical in situ infrared spectroscopy under attenuated total reflection configuration (EC-ATR-FTIRS) combined with cyclic voltammetry in a wide potential window from 0 to 3.
0 V. At 5 MLs graphene, we observe significant oxidation current at E > V in Cited by: 7. As mentioned in the introduction, degradation of cellulose is caused by two possible degradation pathways – hydrolysis and oxidation that both lead to depolymerisation and the formation of carbonyl groups on cellulose chains.
As regards oxidation, infrared spectroscopy is especially sensitive to carbonyl groups formation due to their high molar absorptivity in comparison with other functional groups present in cellulose Author: Jacek Bagniuk, Dominika Pawcenis, Adriano M.
Conte, Olivia Pulci, Monika Aksamit-Koperska, Mauro Mis. The,and cm-1 bonds relate to various deformation vibrations of the CH20tt groups * Vysokomol. soyed. 5: No. I,Photo-oxidation of cellulose . This interpretation is based on a study of the oxidation of cellulose by nitro- gen dioxide (CH~0H--COOH Cited by: 1.
Considering the Near Infrared Spectroscopy (NIR) spectra of cellulose fibers, some signals characteristic of this substance can be recognized, e.g., cm −1 (C-H stretching of the second. In this work we investigate the electro-oxidation of CO on Pt() in alkaline solution by using Fourier transform infrared spectroscopy (FTIRS), to determine the adsorption sites of the CO, the intermediate species and the final oxidation product as a function of the applied potential.
Multiple CO vibration bands (on-top, bridge and 3-fold hollow site) are observed on the Pt() electrode. Fourier transform infrared spectroscopy has been used to study cellulose aldehyde groups in bleached cotton, unbleached cotton, and in periodate oxidized cotton.
Second derivative spectroscopy could reproducibly identify aldehyde bonds in oxidized cotton only if. From the change in the intensity of the absorption band at 7µ it was established that a) oxidation of cellulose with oxides of nitrogen proceeds in its first stage with formation simultaneously of carboxy groups a and noncarboxy, intermediate products at C-6; b) oxidation of cellulose with sodium periodate is accompanied by partial oxidation at CCited by: 1.
Methanol oxidation reaction (MOR) has been investigated at sputtered Pt−Ru, Ru, and Pt electrodes by using in-situ FTIR spectroscopy with the attenuated total reflection technique (ATR), which can identify species adsorbed on the electrode surface.
Linear CO, bridged CO, and COO- were detected as the intermediates in the MOR. The electro-oxidation of preadsorbed CO was also studied to Cited by: Zhbankov R.G. () The Possibilities of the Infrared Spectroscopic Method for Investigation of the Properties of Cellulose and Its Derivatives.
In: Infrared Spectra of Cellulose and its by: 1. After DMSO desorption, the infrared spectrum of the sample was identical to the spectrum of the untreated cuticle, including the reestablishment of the shoulder at cm −1. The analysis of these data indicated that a specific and reversible interaction occurs between DMSO and some chemical functional groups in the cuticle: DMSO forms an H-bond between the oxygen of the S=O functional group and the hydroxyl groups of the cuticular Cited by: Since periodate oxidation selectively creates (masked) aldehyde groups that can serve as anchors for further modification steps, this method is suitable for modifying and functionalizing cellulose.
Although numerous studies deal with that topic, there are still knowledge gaps regarding periodate by: In this work we report a study, based on micron‐scale space resolved Raman microscopy, infrared reflectance spectroscopy and atomic force microscopy, of differently degraded samples of paper.
Non‐treated and oxidised samples were investigated, as Cited by: Infrared and Raman spectroscopy are essential analytical tools for the structural analysis of paper and pulp chemistry. The studies of cellulose, hemicellulose, lignin, thermal- and photo-induced Author: Jerome Workman. Afterward, in Bicchieri et al.
(93), the study of foxing stains on paper was implemented by additional infrared spectroscopy and micro-X-ray fluorescence spectrometry analysis, and was enriched.Infrared spectroscopy has been successfully applied to the analysis of papers and inks (Ferrer ; Calvini ; Lojewska ).
Different methodologies and accessories can be used depending on the amount of sample, destruc-tion, and information required.
In this study we have used two different methods: diffuse reﬂection and microscopy.The aim of this study was to investigate the possibilities to produce dialdehyde cellulose at an industrial level, where the regeneration of consumed periodate plays a significant role to obtain a feasible process.
A screening of the periodate oxidation of cellulose containing seven experimentsFile Size: 1MB.