Special Issue "Nanocellulose and Nanochitin: Characterization and Applicaitions"

A special issue of Nanomaterials (ISSN 2079-4991).

Deadline for manuscript submissions: closed (15 September 2019).

Special Issue Editor

Prof. Aji P. Mathew
Website
Guest Editor
Department of Materials and Environmental Chemistry, Stockholm University, SE-106 91 Stockholm
Interests: nanocellulose; nanochitin; functional materials; adsorption, mechanical properties

Special Issue Information

Dear Colleagues,

Nanocellulose and nanochitin have generated a great deal of interest as reinforcement and functional nanomaterials because of their renewability, biocompatibility, high specific surface area, low density and good mechanical properties. Nanocellulose and nanochitin can be isolated from biomass using a top down approach and there is an ongoing effort to produce these nanomaterials economically and efficiently. We invite authors to contribute original research articles or comprehensive reviews covering the most recent progress and new developments in the isolation, charcaterisation and utilization of nanocellulose and nanochitin in various composite and functional materials. This Special Issue aims to cover a broad range of subjects, from nanomaterials synthesis to design and characterization. The format of welcomed articles includes full papers, communications, and reviews. Potential topics include, but are not limited to:

  1. Nanocellulose/nanochitin isolation from biomass and residues
  2. Processing strategies for materails form nanocellulose and nanochitin
  3. Nanocellulose and nanochitin for functional applications
  4. Novel charcterization techniques to understand nanocellulose/nanochitin based materials

Prof. Aji P. Mathew
Guest Editor

Manuscript Submission Information

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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. Nanomaterials 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 2000 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

  • nanocellulose
  • nanochitin
  • processing
  • mechanical properties
  • functional materials

Published Papers (2 papers)

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Research

Open AccessArticle
Electron Beam Irradiation Isolates Cellulose Nanofiber from Korea “Tall Goldenrod” Invasive Alien Plant Pulp
Nanomaterials 2019, 9(10), 1358; https://doi.org/10.3390/nano9101358 - 22 Sep 2019
Abstract
This work investigates the possibility of isolating cellulose nanofibers from pulps of tall goldenrod plant, which are invasive plants in Korea, by a convenient method, without strong acids or high-pressure homogenization, using electron beam irradiation (EBI). The obtained cellulose nanofibers were characterized by [...] Read more.
This work investigates the possibility of isolating cellulose nanofibers from pulps of tall goldenrod plant, which are invasive plants in Korea, by a convenient method, without strong acids or high-pressure homogenization, using electron beam irradiation (EBI). The obtained cellulose nanofibers were characterized by scanning electron microscopy (SEM), ultraviolet–visible (UV–vis) spectroscopy, X-ray diffraction (XRD), thermogravimetric analysis (TGA), and in terms of their mechanical properties. SEM showed that the initially isolated 10-μm-diameter cellulose fibers became more finely separated with increasing EBI dose, and that cellulose fibers treated with 300 kGy of EBI were separated into long cellulose nanofibers of around 160 nm in diameter. In addition, the paper samples prepared from more finely separated fibers generated by using higher doses of EBI had enhanced UV–vis transmittance. Via the XRD analysis, we observed that cellulose I in the EBI-treated cellulose fibers were gradually converted into a different type of cellulose similar to cellulose type II, as the EBI dose increased. Meanwhile, the TGA demonstrated that the finely separated cellulose fibers observed after administering the high EBI dose had lowered thermal stability due to the reduction of cellulose I but higher char yield. In addition, tensile strengths of paper samples increased with decreasing the diameters of their constituent fibers that result from the different EBI doses used in the preparation of the paper pulp. Full article
(This article belongs to the Special Issue Nanocellulose and Nanochitin: Characterization and Applicaitions)
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Open AccessArticle
Fabrication of Cellulose Nanocrystal/Chitosan Hydrogel for Controlled Drug Release
Nanomaterials 2019, 9(2), 253; https://doi.org/10.3390/nano9020253 - 13 Feb 2019
Cited by 9
Abstract
In this work, a novel nanocomposite hydrogel based on cellulose nanocrystal (CNC) and chitosan (CS) was fabricated and applied as a carrier for the controlled delivery of theophylline. CNC was firstly periodate-oxidized to obtain dialdehyde nanocellulose (DACNC). Then, chitosan was crosslinked using DACNC [...] Read more.
In this work, a novel nanocomposite hydrogel based on cellulose nanocrystal (CNC) and chitosan (CS) was fabricated and applied as a carrier for the controlled delivery of theophylline. CNC was firstly periodate-oxidized to obtain dialdehyde nanocellulose (DACNC). Then, chitosan was crosslinked using DACNC as both the matrix and crosslinker in different weight ratios, to fabricate CNC/CS composites. The prepared composites were characterized using Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction pattern (XRD), scanning electron microscopy (SEM), zeta potential measurement and swelling ratio tests. FT-IR results confirmed the successful reaction between the free amino groups on chitosan and the aldehyde groups on DACNC. With the increase of chitosan percentage in the hydrogel, the isoelectric point was shifted towards an alkaline pH, which was probably caused by the higher content of free amino groups. The swelling ratio of the composite also increased, which may have been due to the decrease of crosslinking density. Because the swelling ratio of the drug-loaded hydrogels differed under varied pH values, the cumulative drug release percentage of the composite hydrogel was achieved to approximately 85% and 23% in the gastric (pH 1.5) and intestinal (pH 7.4) fluids, respectively. Therefore, CNC/CS hydrogel has application potential as a theophylline carrier. Full article
(This article belongs to the Special Issue Nanocellulose and Nanochitin: Characterization and Applicaitions)
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