Towards the development of highly transparent, flexible and water-resistant bio-based nanopapers: tailoring physico-mechanical properties

Tarrés, Quim; Mutjé, Pere

doi:10.1007/s10570-019-02524-8

Cited by 13 publications

(9 citation statements)

References 57 publications

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“…CNF exhibited a cationic demand (CD) of 1238 µeq/g and the carboxyl content (CC) accounted for 793 µeq/g. When considering the amount of NaClO that was used as oxidizing agent, the obtained values for CD and CC are in consonance with previously reported results [10,28]. In addition, the obtained diameter and specific surface area, derived from the calculations detailed above, indicated that the obtained cellulose nanomaterial can be classified as CNF.…”

Section: Characterization Of the Reinforcementsupporting

confidence: 89%

“…Finally, the trated suspension (2 wt % consistency) was gradually passed through a high-pressure homogenizer (PANDA Plus 2000, Gea Niro Soavi, Parma, Italy) operating at different pressures. The selected sequence was three passes at 300-bar, three passes at 600-bar, and three passes at 900-bar, as previously reported [28]. The pressure was gradually increased to avoid clogging in the pressure chambers.…”

Section: Preparation Of Cnfmentioning

confidence: 99%

“…As expected, the classification is based on morphology and crystallinity degree. Their unique properties confer them the capability to be used in several sectors, such as papermaking, paints, biomedicine, composites, and many other sectors [22][23][24][25][26][27][28]. Despite all of the abovementioned promising applications, the use of NC in thermoplastic composites is still challenging, mainly due to the hydrophobic character of most of the matrices, the water content of NC, and its hydrophilic character.…”

Section: Introductionmentioning

confidence: 99%

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Research on the Strengthening Advantages on Using Cellulose Nanofibers as Polyvinyl Alcohol Reinforcement

et al. 2020

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The present work aims to combine the unique properties of cellulose nanofibers (CNF) with polyvinyl alcohol (PVA) to obtain high-performance nanocomposites. CNF were obtained by means of TEMPO-mediated ((2,2,6,6-Tetramethylpiperidin-1-yl)oxyl) oxidation, incorporated into the PVA matrix by means of compounding in a single-screw co-rotating internal mixer and then processed by means of injection molding. It was found that CNF were able to improve the tensile strength of PVA in 85% when 4.50 wt % of CNF were added. In addition, the incorporation of a 2.25 wt % of CNF enhanced the tensile strength to the same level that when 40 wt % of microsized fibers (stone groundwood pulp, SGW) were incorporated, which indicated that CNF possessed significantly higher intrinsic mechanical properties than microsized fibers. SGW was selected as reference for microsized fibers due to their extended use in wood plastic composites. Finally, a micromechanical analysis was performed, obtaining coupling factors near to 0.2, indicating good interphase between CNF and PVA. Overall, it was found that the use of CNF is clearly advantageous to the use of common cellulosic fibers if superior mechanical properties are desired, but there are still some limitations that are related to processing that restrict the reinforcement content at low contents.

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Section: Characterization Of the Reinforcementsupporting

confidence: 89%

Section: Preparation Of Cnfmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Research on the Strengthening Advantages on Using Cellulose Nanofibers as Polyvinyl Alcohol Reinforcement

et al. 2020

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“…While we have used this relationship in previous works [17,52], it did not seem to work in this case since we obtained a length of approximately 1 nm when we introduced the data of CNF-25 into this relationship. This result is impossible because such CNF would have greater diameter than length.…”

Section: Resultsmentioning

confidence: 99%

“…In recent years, the use of different cellulosic pulps as raw materials for the production of cellulose nanofibers (CNF) has gained significant interest among the scientific and technological community [16,17,18]. CNF can be defined as cellulosic fibers, containing both amorphous and crystalline regions, with diameters in the nanoscale and lengths of a few micrometers.…”

Section: Introductionmentioning

confidence: 99%

TEMPO-Oxidized Cellulose Nanofibers: A Potential Bio-Based Superabsorbent for Diaper Production

et al. 2019

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Single-use plastics are expected to disappear, mainly due to the rise of stricter regulations to combat their impact on the environment. As an example, the recent European Directive on Single-Use-Plastics (SUP) will be implemented between 2021 and 2024 and will directly prohibit the use of some SUP. Baby diapers are one of the most used single-used products in our daily lives, and it is estimated that most of the ~4000 diapers that each baby uses in their life go to landfill. Such diapers usually contain superabsorbent polymers (SAP) that are based on acrylic acid-acrylamide mixtures with high water retention capacity, but they are neither bio-based nor biodegradable. In this work, we have developed bio-based superabsorbent aerogels made of cellulose nanofibers (CNF) and propose their potential use in baby diapers. TEMPO-oxidized CNF at different oxidation degrees were prepared and tested. The obtained CNF exhibited higher free swelling capacity (FSC) than the commercial fluff pulp (ranging from 117.62% to 245.21% higher) and also than the diaper absorbent, except for CNF-5 (ranging from 31.56% to 54.55%), even under compression. Overall, the present work shows a case study where CNF could have a potential application with market opportunities.

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Oxidative treatments for cellulose nanofibers production: a comparative study between TEMPO-mediated and ammonium persulfate oxidation

et al. 2020

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Towards the development of highly transparent, flexible and water-resistant bio-based nanopapers: tailoring physico-mechanical properties

Cited by 13 publications

References 57 publications

Research on the Strengthening Advantages on Using Cellulose Nanofibers as Polyvinyl Alcohol Reinforcement

Research on the Strengthening Advantages on Using Cellulose Nanofibers as Polyvinyl Alcohol Reinforcement

TEMPO-Oxidized Cellulose Nanofibers: A Potential Bio-Based Superabsorbent for Diaper Production

Oxidative treatments for cellulose nanofibers production: a comparative study between TEMPO-mediated and ammonium persulfate oxidation

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