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Nanomaterials
Special Issues
Advanced Nanocellulose-Based Materials: Production, Properties and Applications II
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Advanced Nanocellulose-Based Materials: Production, Properties and Applications II

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Nanocomposite Materials".

Deadline for manuscript submissions: closed (10 July 2023) | Viewed by 2560

Special Issue Editors

Dr. Carla Vilela

E-Mail Website
Guest Editor
CICECO–Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
Interests: sustainable use of biopolymers (nanocellulose, chitosan, pullulan, proteins, etc.) for the design of functional nanostructured materials for biomedical (e.g., drug delivery and wound healing) and technological (e.g., active packaging, fuel cells, and water remediation) applications
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Carmen S. R. Freire

E-Mail Website
Guest Editor
CICECO—Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
Interests: production and application of biogenic nanofibers (bacterial cellulose and protein fibrils); nanostructured biocomposites; bio-based materials for biomedical applications (wound healing, drug delivery and 3D-bioprinting); biocomposites and functional paper materials; chemical modification of (nano)cellulose fibers and other polysaccharides and their characterization and applications; chemistry of lignocellulosic materials (cellulose, wood, cork, etc.)
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Cellulose nanocrystals (CNCs), cellulose nanofibers (CNFs) and bacterial nanocellulose (BNC) are three nanometric forms of cellulose, the most abundant natural polymer, and are presently in the spotlight in manifold domains of modern science and technology. The environmentally friendly connotations, peculiar characteristics and multiple functionalities of these nanoscale cellulosic substrates are being explored to engineer advanced nanocomposites and nanohybrid materials for application in diverse fields, such as mechanics, optics, electronics, energy, environment, biology, and medicine.

Following the enormous success of the first Special Issue, titled “Advanced Nanocellulose-Based Materials: Production, Properties, and Applications”, the aim of the present Special Issue, “Advanced Nanocellulose-Based Materials: Production, Properties, and Applications II”, is to pursue the bringing together of a collection of original research and review papers from scientists working with nanocellulose. Therefore, research that is illustrative of recent developments in dealing with the production methodologies, properties and applications of nanocellulose-based materials, such as nanocomposites, hybrids, hydrogels, films and fibers, is welcomed to this Special Issue.

Dr. Carla Vilela
Prof. Dr. Carmen S. R. Freire
Guest Editors

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 submissions that pass pre-check are 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. Nanomaterials is an international peer-reviewed open access semimonthly 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 2900 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 nanocrystals
  • cellulose nanofibers
  • bacterial nanocellulose
  • nanocomposites
  • hybrids
  • hydrogels
  • films
  • fibers
  • biomedical applications
  • technological applications

Published Papers (2 papers)

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Research

18 pages, 4311 KiB  
Article
Biobased Electronics: Tunable Dielectric and Piezoelectric Cellulose Nanocrystal—Protein Films
by Daniel Voignac, Shylee Belsey, Elisabeth Wermter, Yossi Paltiel and Oded Shoseyov
Nanomaterials 2023, 13(15), 2258; https://0-doi-org.brum.beds.ac.uk/10.3390/nano13152258 - 06 Aug 2023
Viewed by 1566
Abstract
Cellulose has been a go-to material for its dielectric properties from the onset of capacitor development. The demand for an energy storage solution continues to grow, but the supply remains limited and relies too often on fossil and mined materials. This work proposes [...] Read more.
Cellulose has been a go-to material for its dielectric properties from the onset of capacitor development. The demand for an energy storage solution continues to grow, but the supply remains limited and relies too often on fossil and mined materials. This work proposes a fully sustainable and green method with which to produce dielectric thin films made of renewable and degradable materials. Cellulose nanocrystals (CNC) made an excellent matrix for the dispersion of proteins and the fabrication of robust transparent thin films with enhanced dielectric permittivity. A range of proteins sources, additives and concentrations allowed for us to control the dielectric permittivity from εr = 4 to 50. The proteins screened came from animal and plant sources. The films were formed from drying a water suspension of the CNC and proteins through evaporation-induced self-assembly. This yielded nano-layered structures with very high specific surface areas, ideal for energy storage devices. The resulting films were characterized with respect to the electrical, mechanical, piezoelectric, and optical properties to be compared. Electrically conductive (σ = 1.53 × 103 S/m) CNC films were prepared with carbon nanotubes (CNT). The fabricated films were used to make flexible, sustainable, and degradable capacitors by layering protein-based films between CNC–CNT composite films. Full article
(This article belongs to the Special Issue Advanced Nanocellulose-Based Materials: Production, Properties and Applications II)
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13 pages, 1922 KiB  
Article
Dynamic and Static Assembly of Sulfated Cellulose Nanocrystals with Alkali Metal Counter Cations
by Patrick Petschacher, Reza Ghanbari, Carina Sampl, Helmar Wiltsche, Roland Kádár, Stefan Spirk and Tiina Nypelö
Nanomaterials 2022, 12(18), 3131; https://0-doi-org.brum.beds.ac.uk/10.3390/nano12183131 - 09 Sep 2022
Cited by 2 | Viewed by 1611
Abstract
Sulfate groups on cellulose particles such as cellulose nanocrystals (CNCs) provide colloidal stability credit to electrostatic repulsion between the like-charged particles. The introduction of sodium counter cations on the sulfate groups enables drying of the CNC suspensions without irreversible aggregation. Less is known [...] Read more.
Sulfate groups on cellulose particles such as cellulose nanocrystals (CNCs) provide colloidal stability credit to electrostatic repulsion between the like-charged particles. The introduction of sodium counter cations on the sulfate groups enables drying of the CNC suspensions without irreversible aggregation. Less is known about the effect of other counter cations than sodium on extending the properties of the CNC particles. Here, we introduce the alkali metal counter cations, Li+, Na+, K+, Rb+, and Cs+, on sulfated CNCs without an ion exchange resin, which, so far, has been a common practice. We demonstrate that the facile ion exchange is an efficient method to exchange to any alkali metal cation of sulfate half esters, with exchange rates between 76 and 89%. The ability to form liquid crystalline order in rest was observed by the presence of birefringence patterns and followed the Hofmeister series prediction of a decreasing ability to form anisotropy with an increasing element number. However, we observed the K-CNC rheology and birefringence as a stand-out case within the series of alkali metal modifications, with dynamic moduli and loss tangent indicating a network disruptive effect compared to the other counter cations, whereas observation of the development of birefringence patterns in flow showed the absence of self- or dynamically-assembled liquid crystalline order. Full article
(This article belongs to the Special Issue Advanced Nanocellulose-Based Materials: Production, Properties and Applications II)
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