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Special Issue "Cellulose Chemical Modifications—Towards Sustainable Materials"

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Green Chemistry".

Deadline for manuscript submissions: 31 March 2018

Special Issue Editor

Guest Editor
Dr. Janet L. Scott

Centre for Sustainable Chemical Technologies, Department of Chemistry, University of Bath, Bath, BA2 7AY, UK
Website | E-Mail
Interests: sustainable chemical technologies; functional materials; renewable sources; green chemistry

Special Issue Information

Dear Colleagues,

Cellulose is an abundant and renewable biopolymer, relied upon by nature to provide structure and strength to many organisms. The exquisite secondary structures, resulting from intermolecular interactions amongst polymer chains, provide fibrils and fibres of a range of dimensions, morphologies and stiffness and these can be exploited in many materials applications, from polymer fillers to tuneable hydrogels. Solution processing has been enhanced by the discovery that ionic liquids assist dissolution, leading to further opportunities in blending, compounding and forming of cellulose. Chemical modification of cellulose may be employed to confer specific properties to materials (surfaces and bulk), to render cellulose compatible with other polymers, or provide anchoring points for ligands or active agents, greatly widening opportunities for use cellulose based materials.

This Special Issue is devoted to providing an overview of recent developments in the chemical modification of cellulose to enhance materials properties, particularly with a view to developing more sustainable materials, i.e., where the chemistry used is ‘green’ and the product ‘environmentally friendly’.

Dr. Janet L. Scott
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Molecules is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1800 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Cellulose
  • Chemical modification
  • Green chemistry
  • Sustainable materials

Published Papers (3 papers)

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Research

Open AccessArticle Direct Modification of Microcrystalline Cellulose with Ethylenediamine for Use as Adsorbent for Removal Amitriptyline Drug from Environment
Molecules 2017, 22(11), 2039; doi:10.3390/molecules22112039
Received: 4 October 2017 / Revised: 2 November 2017 / Accepted: 17 November 2017 / Published: 22 November 2017
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Abstract
Cellulose derivatives have been widely used as adsorbents for the removal of micropollutants such as drugs, dyes, and metals, due to their abundance, low cost and non-contaminating nature. In this context, several studies have been performed searching for new adsorbents (cellulose derivatives) efficient
[...] Read more.
Cellulose derivatives have been widely used as adsorbents for the removal of micropollutants such as drugs, dyes, and metals, due to their abundance, low cost and non-contaminating nature. In this context, several studies have been performed searching for new adsorbents (cellulose derivatives) efficient at contaminant removal from aqueous solutions. Thus, a new adsorbent was synthesized by chemical modification of cellulose with ethylenediamine in the absence of solvent and applied to the adsorption of amitriptyline (AMI) in aqueous solution. The modification reaction was confirmed by X-ray Diffraction (XRD), elemental analysis, Fourier Transform Infrared Spectroscopy (FTIR), Thermogravimetry/Differential Scanning Calorimeter (TG/DSC), solid state Nuclear Magnetic Resonance of 1H and 13C (1H-NMR and 13C-NMR). Moreover, the effectiveness of reaction was confirmed by computational calculations using Density Functional Theory (DFT) at level B3LYP/6-31G(d). This adsorption process was influenced by pH, time, concentration, temperature and did not show significant changes due to the ionic strength variation. Through these experiments, it was observed that the maximum adsorption capacity of AMI by CN polymer at 298 K, 300 min, and pH 7 was 87.66 ± 0.60 mg·g−1. Full article
(This article belongs to the Special Issue Cellulose Chemical Modifications—Towards Sustainable Materials)
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Open AccessArticle One-Bath Pretreatment for Enhanced Color Yield of Ink-Jet Prints Using Reactive Inks
Molecules 2017, 22(11), 1959; doi:10.3390/molecules22111959
Received: 30 September 2017 / Revised: 4 November 2017 / Accepted: 9 November 2017 / Published: 13 November 2017
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Abstract
In order to facilely increase the color yield of ink-jet prints using reactive inks, one-bath pretreatment of cotton fabrics with pretreatment formulation containing sodium alginate, glycidyltrimethylammonium chloride (GTA), sodium hydroxide, and urea is designed for realizing sizing and cationization at the same time.
[...] Read more.
In order to facilely increase the color yield of ink-jet prints using reactive inks, one-bath pretreatment of cotton fabrics with pretreatment formulation containing sodium alginate, glycidyltrimethylammonium chloride (GTA), sodium hydroxide, and urea is designed for realizing sizing and cationization at the same time. The pretreatment conditions, including the concentrations of GTA and alkali, baking temperature, and time are optimized based on the result of thecolor yield on cationic cotton for magenta ink. The mechanism for color yield enhancement on GTA-modified fabrics is discussed and the stability of GTA in the print paste is investigated. Scanning electron microscopey, tear strength, and thermogravimetric analysis of the modified and unmodified cotton are studied and compared. Using the optimal pretreatment conditions, color yield on the cationic cotton for magenta, cyan, yellow, and black reactive inks are increased by 128.7%, 142.5%, 71.0%, and 38.1%, respectively, compared with the corresponding color yield on the uncationized cotton. Much less wastewater is produced using this one-bath pretreatment method. Colorfastness of the reactive dyes on the modified and unmodified cotton is compared and boundary clarity between different colors is evaluated by ink-jet printing of colorful patterns. Full article
(This article belongs to the Special Issue Cellulose Chemical Modifications—Towards Sustainable Materials)
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Open AccessArticle Acetylation of Microcrystalline Cellulose by Transesterification in AmimCl/DMSO Cosolvent System
Molecules 2017, 22(9), 1419; doi:10.3390/molecules22091419
Received: 3 July 2017 / Revised: 21 August 2017 / Accepted: 24 August 2017 / Published: 27 August 2017
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Abstract
Recently, IL/cosolvent systems have generated a lot of interest as cellulose-dissolving solvents and reaction media for various kinds of cellulose modification. In the present study, both 1-allyl-3-methylimidazolium chloride (AmimCl)/dimethyl sulfoxide (DMSO) and AmimCl/N,N-dimethylformamide (DMF) systems were employed to synthesize
[...] Read more.
Recently, IL/cosolvent systems have generated a lot of interest as cellulose-dissolving solvents and reaction media for various kinds of cellulose modification. In the present study, both 1-allyl-3-methylimidazolium chloride (AmimCl)/dimethyl sulfoxide (DMSO) and AmimCl/N,N-dimethylformamide (DMF) systems were employed to synthesize cellulose acetate by transesterification. Microcrystalline cellulose, 1,8-diazabicyclo[5.4.0]undec-7-ene and isopropenyl acetate were chosen as the raw material, catalyst and acetylation reagent, respectively. The results revealed that DMSO was a suitable cosolvent for the transesterification in the homogeneous solution. Moreover, DMSO had a positive effect on the reaction as the cosolvent under the given conditions and the degree of the substitution of cellulose acetate could be significantly enhanced through increasing the molar ratio of DMSO. The synthesized products were characterized by Fourier transform infrared (FT-IR) spectroscopy, 1H and 13C nuclear magnetic resonance spectroscopy (1H-NMR and 13C-NMR), correlation spectroscopy (COSY), heteronuclear single quantum correlation (HSQC) spectroscopy, and X-ray diffraction (XRD) to confirm the chemical and physical structure of the cellulose acetate generated. The thermal properties were also evaluated using thermogravimetric analysis (TGA)/derivative thermogravimetry (DTG). Full article
(This article belongs to the Special Issue Cellulose Chemical Modifications—Towards Sustainable Materials)
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