Nanocellulose for Industrial Use

Blanco, Ángeles; Monte, M. Concepción; Campano, Cristina; Balea, Ana; Merayo, Noemí; Negro, Carlos

doi:10.1016/b978-0-12-813351-4.00005-5

Cited by 145 publications

(71 citation statements)

References 447 publications

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“…[65] Furthermore, the integrity of packaged food needs to be maintained and the migration of contaminants to food needs to be avoided. [66] Polylactic acid (PLA) is a bio-based material and is used for biodegradable packaging due to its transparency, thermoplastic biopolymer, renewable, high strength, and moderate barrier properties. [67,68] To give the reader an idea of its properties, in one study PLA had a tensile strength of 41.83 ± 0.63 MPa and an elongation at break of 4.07% ± 0.37%.…”

Section: Evaluation Of Mechanical Propertiesmentioning

confidence: 99%

Hybrid bacterial cellulose‐collagen membranes production in culture media enriched with antioxidant compounds from plant extracts

Fernandes

Maciel

Oliveira

et al. 2020

Polymer Engineering & Sci

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Bioactive, structural, and mechanical properties were measured of a cellulose biopolymer produced by Gluconacetobacter xylinus using hydrolyzed collagen and phenolic compounds from teas and grape pomace (GP) in an optimized culture medium. Biopolymers were impregnated with an antibiotic to investigate possible antibacterial activities. Hybrid bacterial cellulose (BC)-collagen membranes obtained from cultures with green tea and a ternary mixture (TM) of teas with GP presented a high concentration of phenolic compounds (879.7 and 1312.8 mg gallic acid equivalent per liter) and antioxidant activity (973.3 and 575.9 mmol/g), respectively. BC membranes included a nanodimensional network of microfibrils, and the addition of hydrolyzed collagen in the TM of teas in situ resulted in thicker structures with improved mechanical properties. BC-collagen membranes pretreated with cephalexin exhibited significant inhibition against Escherichia coli and Staphylococcus aureus. The enrichment of the culture media with plant phenolic compounds and collagen resulted in the formation of hybrid BC membranes in a shorter time when compared to those produced without these components. Membranes modified with bioactive compounds in situ and antibiotics ex situ can be turned into potential products for application in biomaterials with antioxidant activity.

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Section: Evaluation Of Mechanical Propertiesmentioning

confidence: 99%

Hybrid bacterial cellulose‐collagen membranes production in culture media enriched with antioxidant compounds from plant extracts

Fernandes

Maciel

Oliveira

et al. 2020

Polymer Engineering & Sci

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“…cellulose nanofibers (CNF) and cellulose nanocrystals (CNC), which differ in their dimensions, functions, and preparation methods. Generally, the production of CNF consists of mechanical treatments, while acid hydrolysis is the primary chemical process used to produce CNC [71]. These nanomaterials reveal a host of advantages such as high surface area-to-volume ratio, large aspect ratio (typically 20-70), high strength, and thermal stability, due to their nanometric dimensions together with a high degree of molecular order [72].…”

Section: Cottonmentioning

confidence: 99%

Returning to Nature for the Design of Sorptive Phases in Solid-Phase Microextraction

et al. 2019

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Green analytical chemistry principles aim to minimize the negative impact of analytical procedures in the environment, which can be considered both at close (to ensure the safety of the analysts) and global (to conserve our natural resources) levels. These principles suggest, among other guidelines, the reduction/minimization of the sample treatment and the use of renewable sources when possible. The first aspect is largely fulfilled by microextraction, which is considered to be among the greenest sample treatment techniques. The second consideration is attainable if natural products are used as raw materials for the preparation of new extraction phases. This strategy is in line with the change in our production system, which is being gradually moved from a linear model (take-make-dispose) to a circular one (including reusing and recycling as key terms). This article reviews the potential of natural products as sorbents in extraction and microextraction techniques from the synergic perspectives of two research groups working on the topic. The article covers the use of unmodified natural materials and the modified ones (although the latter has a less green character) to draw a general picture of the usefulness of the materials.Separations 2020, 7, 2 2 of 22 principle identifies one of the trends of current research in analytical sciences, it is difficult to be applied when complex samples containing the analytes at very low concentrations are processed. In such scenarios, the simplification of the sample treatment and the reduction of the sources applied (reagents, energy) can be a more practical objective, at least currently. Microextraction techniques fulfill the latter criteria [8], and they are considered among the greenest sample treatment techniques [9].Microextraction techniques have evolved in the last decade following some key trends. Among them, the development of new extraction phases can be highlighted, considering the context of this review article. In this evolution, the tenth (use of renewable resources) and eleventh (replace or remove toxic reagents) principles of GAC are especially relevant [7]. In the liquid microextraction context, environmentally friendly solvents [10,11] such as CyreneTM [12] and deep eutectic solvents [13] are clear examples of this progress.The paradigm of our production system, which up to now has been based on a linear "take-make-dispose" model, is progressively changed to a circular model [14] where reusing, repairing, refurbishing, and recycling appear as key terms. The use of surpluses of natural products as raw materials for the preparation of new sorbents is an interesting contribution of analytical chemistry for changing the production model. This review article, which combines the vision of two research groups working in the topic, tries to draw the general picture of the potential of natural products for the synthesis of new sorptive phases in solid phase extraction and solid phase microextraction. The article will cover strategies with different green characterist...

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“…The degree of polymerization (DP) of this semi-crystalline biopolymer varies according to the raw material used to obtain it and the method used for its extraction. For instance, wood pulp has a DP between 10,000 and 15,000 glycosidic units, while values for cellulose of bacterial origin range from 2,000 to 6,000 [4].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Behavior of Cellulose Nanofibrils Functionalized with Dicyanovinyl Groups

Pereira¹,

Gallina²,

Pereira-da-Silva³

et al. 2021

Nanofibers - Synthesis, Properties and Applications

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Cellulose is considered one of the most important renewable sources of biopolymers on Earth. It has attracted widespread attention due to its physical–chemical characteristics, such as biocompatibility, low toxicity, biodegradability, low density, high strength, stability in organic solvents, in addition to having hydroxyl groups, which enable its chemical modification. In this study, cellulose nanofibrils (CNFs) were functionalized with dicyanovinyl groups through nucleophilic vinylic substitution (SNV) and used as electrocatalyst in electrochemical of carbon dioxide (CO2) reduction. Results indicate that introducing dicyanovinyl groups into the structure of nanocellulose increases electrocatalytic activity as compared to that of pure nanocellulose, shifting the onset potential of the electrochemical CO2 reduction reaction to more positive values as compared to those for the reaction with argon. The atomic force microscopy (AFM) images show no changes in the morphology of CNFs after chemical modification.

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Nanocellulose for Industrial Use

Cited by 145 publications

References 447 publications

Hybrid bacterial cellulose‐collagen membranes production in culture media enriched with antioxidant compounds from plant extracts

Hybrid bacterial cellulose‐collagen membranes production in culture media enriched with antioxidant compounds from plant extracts

Returning to Nature for the Design of Sorptive Phases in Solid-Phase Microextraction

Electrochemical Behavior of Cellulose Nanofibrils Functionalized with Dicyanovinyl Groups

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