Highly transparent 100% cellulose nanofibril films with extremely high oxygen barriers in high relative humidity

Xia, Jianyu; Zhang, Zhe; Liu, Wei; Li, Vincent C. F.; Cao, Ya; Zhang, Wei; Deng, Yulin

doi:10.1007/s10570-018-1843-y

Cited by 40 publications

(33 citation statements)

References 46 publications

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“…One approach is thermal annealing above 100°C to drive off water, and the other is the use of multivalent cations to "crosslink" fibers and mitigate swelling with water vapor. Thermal annealing led to OP as low as 0.6 cm 3 μm m −2 day −1 kPa −1 at 23°C and 80% RH [32] in CNF films and use of Al 3+ ion in CNC films led to 0.08 cm 3 μm m −2 day −1 kPa −1 at 23°C and 80% RH [38].…”

Section: Property Overview Of Neat Cellulose and Chitinmentioning

confidence: 98%

“…The elastic modulus and tensile stress of individual ChNFs are estimated to be > 150 GPa [26] and 1.6 GPa, respectively [27]. It has been shown that films of neat CNCs [28][29][30], CNFs [31,32], ChNFs [15,30], ChNWs [24,33], and ChNCs [34,35] have low oxygen permeability (OP). Xia et al [32] fabricated highly transparent 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-oxidized CNF films with sodium borohydride reducing agent.…”

Section: Property Overview Of Neat Cellulose and Chitinmentioning

confidence: 99%

“…It has been shown that films of neat CNCs [28][29][30], CNFs [31,32], ChNFs [15,30], ChNWs [24,33], and ChNCs [34,35] have low oxygen permeability (OP). Xia et al [32] fabricated highly transparent 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-oxidized CNF films with sodium borohydride reducing agent. Freestanding films had an OP of 0.203 cm 3 μm m −2 day −1 kPa −1 and a water vapor transmission rate (WVTR) of1 15 g m −2 day −1 at 23°C and 50% relative humidity (RH).…”

Section: Property Overview Of Neat Cellulose and Chitinmentioning

confidence: 99%

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Chitin- and cellulose-based sustainable barrier materials: a review

Bourg

et al. 2020

emergent mater.

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The accumulation of synthetic plastics used in packaging applications in landfills and the environment is a serious problem. This challenge is driving research efforts to develop biodegradable, compostable, or recyclable barrier materials derived from renewable sources. Cellulose, chitin/chitosan, and their combinations are versatile biobased packaging materials because of their diverse biological properties (biocompatibility, biodegradability, antimicrobial properties, antioxidant activity, non-toxicity, and less immunogenic compared to protein), superior physical properties (high surface area, good barrier properties, and mechanical properties), and they can be assembled into different forms and shapes (powders, fibers, films, beads, sponges, gels, and solutions). They can be either assembled into packaging films or used as fillers to improve the properties of other biobased polymers. Methods such as preparation of composites, multilayer coating, and alignment control are used to further improve their barrier, mechanical properties, and ameliorate their moisture sensitivity. With the growing application of cellulose and chitin-based packaging materials, their biodegradability and recyclability are also discussed in this review paper. The future trends of these biobased materials in packaging applications and the possibility of gradually replacing petroleum-based plastics are analyzed in the “Conclusions” section.

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Section: Property Overview Of Neat Cellulose and Chitinmentioning

confidence: 98%

Section: Property Overview Of Neat Cellulose and Chitinmentioning

confidence: 99%

Section: Property Overview Of Neat Cellulose and Chitinmentioning

confidence: 99%

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Chitin- and cellulose-based sustainable barrier materials: a review

Bourg

et al. 2020

emergent mater.

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“…Heat treatment increases the crystallinity of the ber and enhances its mechanical properties (Cao et al 2007). Heat treatment was reported to decrease the porosity and oxygen permeability of a CNF lm (Xia et al 2018). Sharma et al (2014) used heat treatment to increase both the barrier and mechanical properties of a CNF lm.…”

Section: Heat Treatmentmentioning

confidence: 99%

Physical and chemical modifications of cellulose fibers for food packaging applications

et al. 2021

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Cellulose bers have gained considerable interest for use as gas barrier and reinforcing llers in food packaging materials because of their interesting properties including biodegradability, low density, nontoxicity, and low cost. Although the modi cation of cellulose nanomaterials for reinforcing applications has been reviewed in the literature, they suffer from a lack of comparative results, and the modi cations related to food packaging applications have not been covered yet. This study reviews physical and chemical methods used to improve oxygen and water barrier properties, water uptake, mechanical strength, and transparency of different food packaging lms of cellulose nanomaterials and provides comparative results. Heat treatment, esteri cation, and tempo-mediated and periodate oxidation are the most common methods for the improvement of the barrier properties of free-standing, bilayer, and composite lms prepared from cellulose nanomaterials. Modi cation using silane compounds is a wellestablished method for improving the mechanical properties of cellulose bers and polymer composite lms.

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“…As a representative of biomass, lignocellulose is an ideal candidate for the preparation of biocompatible materials due to its abundance and good renewability. 17,18 Most researchers focus on the preparation and application of cellulose-based thermo-responsive hydrogels by choosing lignin-free cellulose materials as the feedstock for their mature technology. 19,20 However, the achievement of cellulose from lignocellulose materials requires a series of harsh separation and purication processes, and the usage of bleaching chemicals would increase the cost and decrease the environmental compatibility of the biomass.…”

Section: Introductionmentioning

confidence: 99%