Gas permeability and selectivity of cellulose nanocrystals films (layers) deposited by spin coating

Herrera, Martha; Mathew, Aji P.; Oksman, Kristiina

doi:10.1016/j.carbpol.2014.06.036

Cited by 81 publications

(52 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Cellulose has a strong tendency towards self-association, making the formation of film-like structures easy. This dense arrangement of NC was previously reported in several studies (Li et al 2013;Herrera et al 2014Herrera et al , 2016. Cross-section SEM images of the porous control sample as well as the thin and dense NC3-S coating on the substrate surface can be seen in Fig.…”

Section: Microstructure and Roughnesssupporting

confidence: 85%

“…The process is described elsewhere by Mathew et al (2014), and the raw material characteristics of this specific nanocellulose are described more in detail elsewhere (Herrera et al 2014;Mathew et al 2014;Moberg et al 2017). Briefly, a bioethanol residue containing lignin and cellulose was purified, the remaining highly crystalline cellulose (concentration of 1.5 wt%) was isolated to nanosize using a high-pressure homogenizer APV 2000 (Denmark) with a pressure of 500 bars until a thick gel was formed.…”

Section: Methodsmentioning

confidence: 99%

“…The reason might be the fibrillar substructure of the cellulose, which has tightly packed crystalline regions that are impermeable to water. The crystalline regions increase the tortuous diffusion path for molecules to permeate through the films (Herrera et al 2014;Tammelin and Vartiainen 2014), along with a strong and dense film structure.…”

Section: Barrier Propertiesmentioning

confidence: 99%

“…A more ecological way to solve the problems linked to porous cellulose-based materials is the coating with bio-based resources, such as nanocellulose (NC) (Herrera et al 2016). Although NC particles have been used to coat porous cellulose-based materials, their ability to form rigid three-dimensional networks, can represent a problem that restricts their use in applications where flexibility is needed (Syverud and Stenius 2009;Aulin et al 2010;Herrera et al 2014;Lavoine et al 2014;Herrera et al 2016).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Barrier and mechanical properties of plasticized and cross-linked nanocellulose coatings for paper packaging applications

2017

Self Cite

View full text Add to dashboard Cite

Barrier, mechanical and thermal properties of porous paper substrates dip-coated with nanocellulose (NC) were studied. Sorbitol plasticizer was used to improve the toughness, and citric acid crosslinker to improve the moisture stability of the coatings. In general, the addition of sorbitol increased the barrier properties, maximum strength and toughness as well as the thermal stability of the samples when compared to the non-modified NC coatings. The barrier properties significantly improved, especially for plasticized NC coating's, where the oxygen permeability value was as low as 0.7 mL lm day -1 m -2 kPa -1 at 49% RH and the water vapor permeability was reduced by 60%. Furthermore, we found that the cross-linked plasticized NC coating had a smoother surface (50% lower roughness) compared to non-modified ones. This study shows that the environmentally friendly additives sorbitol and citric acid had positive effects on NC coating properties, increasing its potential use in paperbased packaging applications.

show abstract

Section: Microstructure and Roughnesssupporting

confidence: 85%

Section: Methodsmentioning

confidence: 99%

Section: Barrier Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Barrier and mechanical properties of plasticized and cross-linked nanocellulose coatings for paper packaging applications

2017

Self Cite

View full text Add to dashboard Cite

show abstract

“…The results did indeed follow this behavior and higher contact angles were found for SIL nanofibers and reference nanofibers, namely 60°and 62°respectively, compared to 54°for the bleached SIL nanofibers which has the lowest lignin content. It is also known that the water contact angle correlates with the topographical structure of the surface (Herrera et al 2014). However, in this case any influence that the surface roughness has on the contact angle cannot be distinguished as significant, when the standard deviations are taken into account.…”

Section: Microstructurementioning

confidence: 99%

Switchable ionic liquids enable efficient nanofibrillation of wood pulp

et al. 2017

Self Cite

View full text Add to dashboard Cite

Use of switchable ionic liquid (SIL) pulp offers an efficient and greener technology to produce nanofibers via ultrafine grinding. In this study, we demonstrate that SIL pulp opens up a mechanically efficient route to the nanofibrillation of wood pulp, thus providing both a low cost and chemically benign route to the production of cellulose nanofibers. The degree of fibrillation during the process was evaluated by viscosity and optical microscopy of SIL treated, bleached SIL treated and a reference pulp. Furthermore, films were prepared from the fibrillated material for characterization and tensile testing. It was observed that substantially improved mechanical properties were attained as a result of the grinding process, thus signifying nanofibrillation. Both SIL treated and bleached SIL treated pulps were fibrillated into nanofibers with fiber diameters below 15 nm thus forming networks of hydrophilic nature with an intact crystalline structure. Notably, it was found that the SIL pulp could be fibrillated more efficiently than traditional pulp since nanofibers could be produced with more than 30% less energy when compared to the reference pulp. Additionally, bleaching reduced the energy demand by further 16%. The study demonstrated that this switchable ionic liquid treatment has considerable potential in the commercial production of nanofibers due to the increased efficiency in fibrillation.

show abstract

Water Sorption and Barrier Properties of Cellulose Nanocomposites

Tian

Lucia

2017

Handbook of Nanocellulose and Cellulose Nanocomposites

View full text Add to dashboard Cite

Gas permeability and selectivity of cellulose nanocrystals films (layers) deposited by spin coating

Cited by 81 publications

References 26 publications

Barrier and mechanical properties of plasticized and cross-linked nanocellulose coatings for paper packaging applications

Barrier and mechanical properties of plasticized and cross-linked nanocellulose coatings for paper packaging applications

Switchable ionic liquids enable efficient nanofibrillation of wood pulp

Water Sorption and Barrier Properties of Cellulose Nanocomposites

Contact Info

Product

Resources

About