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      IR Study on Cellulose with the Varied Moisture Contents: Insight into the Supramolecular Structure

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      , *
      Materials
      MDPI
      cellulose, supramolecular structure, moisture content, IR spectroscopy, hydrogen bonding

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          Abstract

          The following article is the first attempt to investigate the supramolecular structure of cellulose with the varied moisture content by the means of Fourier-transform and near infrared spectroscopy techniques. Moreover, authors aimed at the detailed and precise presentation of IR spectra interpretation approach in order to create a reliable guideline for other researchers. On the basis of obtained data, factors indicating biopolymer crystallinity and development of hydrogen interactions were calculated and the peaks representing hydrogen bonding (7500–6000 cm −1, 3700–3000 cm −1, and 1750–1550 cm −1) were resolved using the Gaussian distribution function. Then, the deconvoluted signals have been assigned to the specific interactions occurring at the supramolecular level and the hydrogen bond length, as well bonding-energy were established. Furthermore, not only was the water molecules adsorption observed, but also the possibility of the 3OH⋯O5 intramolecular hydrogen bond shortening in the wet state was found-from (27,786 ± 2) 10 −5 nm to (27,770 ± 5) 10 −5 nm. Additionally, it was proposed that some deconvoluted signals from the region of 3000–2750 cm −1 might be assigned to the hydroxyl group-incorporated hydrogen bonding, which is, undoubtedly, a scientific novelty as the peak was not resolved before.

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            Extraction of cellulose and preparation of nanocellulose from sisal fibers

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              On the mechanism of dissolution of cellulose

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                Author and article information

                Journal
                Materials (Basel)
                Materials (Basel)
                materials
                Materials
                MDPI
                1996-1944
                14 October 2020
                October 2020
                : 13
                : 20
                : 4573
                Affiliations
                Institute of Polymer and Dye Technology, Faculty of Chemistry, Lodz University of Technology, Stefanowskiego 12/16, 90–924 Lodz, Poland; stefan.cichosz@ 123456p.lodz.pl
                Author notes
                [* ]Correspondence: anna.masek@ 123456p.lodz.pl
                Author information
                https://orcid.org/0000-0003-3785-1995
                Article
                materials-13-04573
                10.3390/ma13204573
                7602232
                33066574
                b6639de6-c815-47e1-ba44-a4342b012a9a
                © 2020 by the authors.

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

                History
                : 17 September 2020
                : 09 October 2020
                Categories
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                cellulose,supramolecular structure,moisture content,ir spectroscopy,hydrogen bonding

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