Hydrophobization and smoothing of cellulose nanofibril films by cellulose ester coatings

Willberg‐Keyriläinen, Pia; Vartiainen, Jari; Pelto, Jani; Ropponen, Jarmo

doi:10.1016/j.carbpol.2017.04.082

Cited by 37 publications

(28 citation statements)

References 18 publications

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“…Moisture barrier properties improved almost linearly as a function of ester chain length, thus C16 ester had the lowest water vapor permeability (WVP) of 1128 g × μm m −2 day −1 and C6 ester the highest WVP of 3080 g × μm m −2 day −1 . In this respect, the results correlated well with the previous studies …”

Section: Resultssupporting

confidence: 92%

“…Starch has also been reportedly used with plasticizers as barrier films, but the oxygen permeability (OP) of films is strongly dependent on the water content . Molar mass controlled cellulose fatty acid esters have been reported to have good water vapor barrier properties. These cellulose films also have good mechanical properties, and the films are heat sealable.…”

Section: Introductionmentioning

confidence: 99%

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Cellulose fatty acid ester coated papers for stand‐up pouch applications

Willberg‐Keyriläinen

Ropponen

Alakomi

et al. 2018

J of Applied Polymer Sci

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Stand‐up pouches are one of the fastest growing packaging concepts, which are replacing the traditional packaging formats. In this study, stand‐up pouch prototypes are prepared from cellulose fatty acid coated heat‐sealed virgin kraft paper with leak proof seals. This study demonstrates that molar mass controlled cellulose ester (C6‐C16) coatings can significantly improve the barrier properties of virgin kraft paper. All cellulose ester coatings performed better compared to that of PLA. Cellulose ester coatings also improved the resistance of virgin kraft paper against tested nonpolar oil and grease compounds. In addition, the cellulose ester coatings had no antimicrobial activity, and fewer microbes adhered to them than to the PLA surface. The results demonstrate that cellulose fatty acid ester coatings have high potential in future applications requiring good barrier properties. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46936.

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Section: Resultssupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Cellulose fatty acid ester coated papers for stand‐up pouch applications

Willberg‐Keyriläinen

Ropponen

Alakomi

et al. 2018

J of Applied Polymer Sci

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“…These esters had the highest DS values, which may thus have an effect on the fiber formation. It is earlier reported [13,21] that DS decreases when side chain length of cellulose ester increases in similar reaction conditions due to the steric hindrance, and therefore the DS values of longer side chain cellulose esters are lower than values of shorter side chain esters.…”

Section: Rheological Measurementsmentioning

confidence: 65%

Melt spinnability of long chain cellulose esters

Willberg‐Keyriläinen

Rokkonen

Malm

et al. 2020

J of Applied Polymer Sci

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Technical and hygienic nonwovens, originating typically from fossil‐based synthetic polymers, are the fastest growing applications in the textile industry. Recently developed thermoplastic cellulose fatty acid esters have polyolefin like rheology properties and therefore the suitability of these cellulose esters for fiber production was evaluated. In this study, the melt spinning of textile fibers has been demonstrated using thermoplastic cellulose octanoate. The mechanical properties of melt spun fibers were analyzed by using tensile testing and both the surface and cross‐section morphology of melt spun fibers were studied using the scanning electron microscopy. The surfaces of the fibers were very smooth and also the cross‐section was very uniform and no porosity was observed. While mechanical properties of the produced fibers are not yet as good as those reported for commercial polypropylene (PP) monofilament fibers, they are somewhat more comparable to other cellulose ester‐based fibers. The melt spinning results indicate that the novel cellulose‐based fibers can provide a renewable and recyclable alternative, for example, spun‐laid PP in several hygienic textile and fully oriented in technical applications in future.

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“…The water vapor transmission rates were varying between 230 and 410 g/m2/day and with Gdi coating, the transmission rate was decreased by 77% as compared to uncoated CNF film. The water vapor transmission rates were lower than with cellulose fatty acid ester coated, plasma silylated or walnut oil impregnated CNF films [8,11,15], but not as good as with beeswax and paraffin wax coated microfibrillated cellulose (MFC) films [35], alkyd resin/CNF coated kraft paper [36] or shellac/MFC coated paperboard [37].…”

Section: Resultsmentioning

confidence: 99%

“…Several approaches have been attempted for improving the moisture tolerance of CNF films. In spite of the efforts made by surface silylation [7][8], paraffin wax [3], aluminium oxide (Al 2 O 3 ) [9], alkyl ketene dimer (AKD) [10] and cellulose fatty acid ester coatings [11], or grafting with hydrophobic dodecyl gallate [12], crosslinking [13], compounding with nanoclays [14] or impregnation with walnut oil [15], there is still a need for a more powerful method for hydrophobization of CNF films in a cost effective way. Meanwhile the markets for printed electronics, organic photovoltaics and biosensors are rapidly growing.…”

Section: Introductionmentioning

confidence: 99%

Hydrophobization, smoothing, and barrier improvements of cellulose nanofibril films by sol–gel coatings

et al. 2019

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Hydrophobization and smoothing of cellulose nanofibril films by cellulose ester coatings

Cited by 37 publications

References 18 publications

Cellulose fatty acid ester coated papers for stand‐up pouch applications

Cellulose fatty acid ester coated papers for stand‐up pouch applications

Melt spinnability of long chain cellulose esters

Hydrophobization, smoothing, and barrier improvements of cellulose nanofibril films by sol–gel coatings

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