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

Vartiainen, Jari; Rose, Klaus; Kusano, Yukihiro; Mannila, Juha; Wikström, Lisa

doi:10.1007/s11998-019-00292-5

Cited by 12 publications

(5 citation statements)

References 35 publications

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“…Other recent studies [63] show that the barrier properties of NFC films are improved by hydrophobization of fibrils surface using sol-gel methods. By sol-gel methods, coatings are relatively dense and homogeneous coating layers are obtained with strong adhesion leading to decrease of surface hydrophilicity and water vapor transmission rate.…”

mentioning

confidence: 94%

Review on Polysaccharides Used in Coatings for Food Packaging Papers

2020

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Paper and board show many advantages as packaging materials, but the current technologies employed to obtain adequate barrier properties for food packaging use synthetic polymers coating and lamination with plastic or aluminium foils—treatments which have a negative impact on packaging sustainability, poor recyclability and lack of biodegradability. Recently, biopolymers have attracted increased attention as paper coatings, which can provide new combinations in composite formulas to meet the requirements of food packaging. The number of studies on biopolymers for developing barrier properties of packaging materials is increasing, but only a few of them are addressed to food packaging paper. Polysaccharides are viewed as the main candidates to substitute oil-based polymers in food paper coating, due to their film forming ability, good affinity for paper substrate, appropriate barrier to gases and aroma, and positive effect on mechanical strength. Additionally, these biopolymers are biodegradable, non-toxic and act as a matrix for incorporation additives with specific functionalities for coated paper (i.e., active-antimicrobial properties). This paper presents an overview on the availability and application of polysaccharides from vegetal and marine biomass in coatings for foods packaging paper. The extraction methods, chemical modification and combination routes of these biopolymers in coatings for paper packaging are discussed.

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confidence: 94%

Review on Polysaccharides Used in Coatings for Food Packaging Papers

2020

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“…It should be emphasized that nanotopographic features (according to SEM) on both papers were similar, while the initial microtopography was different, which could partially influence the wettability. Wettability changes were also observed for Si–O–Si, Al–O, and Zr–O ceramic-based sol-gel treated CNF films by Vartiainen et al, who reported an increase in water contact angle from 54 to 102 degrees after the coating [ 34 ]. In this study, decreased water vapor transmission was also reported.…”

Section: Resultsmentioning

confidence: 82%

The Oleofobization of Paper via Plasma Treatment

Resnik

Levičnik

Gosar³

et al. 2021

Polymers

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Cellulose is a promising biomass material suitable for high volume applications. Its potential lies in sustainability, which is becoming one of the leading trends in industry. However, there are certain drawbacks of cellulose materials which limit their use, especially their high wettability and low barrier properties, which can be overcome by applying thin coatings. Plasma technologies present a high potential for deposition of thin environmentally friendly and recyclable coatings. In this paper, two different plasma reactors were used for coating two types of cellulose-based substrates with hexamethyldisiloxane (HMDSO). The changes in surface characteristics were measured by atomic force microscopy (AFM), scanning electron microscopy (SEM), surface free energy and contact angles measurements, X-ray photoelectron spectroscopy (XPS), and secondary ion mass spectrometry (SIMS). Successful oleofobization was observed for an industrial scale reactor where pure HMDSO was used in the absence of oxygen.

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“…To bypass this issue, a smoothening layer can be inserted between the cellulose films and the given functional layer, typically the electrode. This approach (1) can protect the substrate from entering in contact with liquids that swell or dissolve cellulose; (2) can act as a smoothening layer to reduce the overall surface roughness of the substrate; (3) it can increase the substrate gas barrier properties (Vartiainen et al, 2020) (Table 1).…”

Section: Substratesmentioning

confidence: 99%

Bio‐based materials for solar cells

Miettunen,

Hadadian,

García

et al. 2024

WIREs Energy & Environment

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Plant‐based materials are emerging as an alternative to conventional components in advanced energy applications. Among these, energy harvesting from sunlight is highly attractive and, in fact, represents the fastest growing energy technology. This review addresses the broad field of solar cell science since plant‐based components can be utilized in almost all solar technologies, and in certain photovoltaic technologies, they can fulfill most of the roles in photovoltaic devices. There is strengthened recent interest in developing sustainable materials options as well as new functionalities being developed for bio‐based materials. This contribution describes the different options for plant‐derived materials in photovoltaics and discusses their deployment feasibility. We focus on performance, lifetime, and embedded energy, all of which are critical to achieve—economically and sustainably–competitive photovoltaic devices. We address the tendency in the current literature for greenwashing, given that not all plant‐based solutions are environmentally‐sound at the device level. On the other hand, plant‐based materials can offer functionalities that cannot be reached with currently used materials.This article is categorized under: Sustainable Energy > Solar Energy Emerging Technologies > Materials Sustainable Energy > Bioenergy

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

Cited by 12 publications

References 35 publications

Review on Polysaccharides Used in Coatings for Food Packaging Papers

Review on Polysaccharides Used in Coatings for Food Packaging Papers

The Oleofobization of Paper via Plasma Treatment

Bio‐based materials for solar cells

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