Facile Approach for Ecofriendly, Low-Cost, and Water-Resistant Paper Coatings via Palm Kernel Oil

Zeng, Kexin; Gu, Juan; Cao, Changyong

doi:10.1021/acsami.0c00067

Cited by 31 publications

(22 citation statements)

References 44 publications

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“…Migration test: The migration of the packaging films was tested by using 3% acetic acid (w/v) aqueous solution as a food simulant. 58 Briefly, pieces of film samples (10 mm × 10 mm) were immersed in 2 mL of the simulant for different time periods. After immersing for different times, the film samples were removed, and the UV−vis spectra of residual simulants were analyzed.…”

Section: ■ Methodsmentioning

confidence: 99%

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A Naturally Derived Nanocomposite Film with Photodynamic Antibacterial Activity: New Prospect for Sustainable Food Packaging

Zhe

et al. 2021

ACS Appl. Mater. Interfaces

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Food packaging with efficient antibacterial ability is highly desirable and challenging in facing the crisis of microbial contamination. However, most present packaging is based on metal-based antibacterial agents and requires a time-consuming antibacterial process. Here, the unique packaging (CC/BB films) featuring aggregation-induced emission behavior and photodynamic inactivation activity is prepared by dispersing self-assembled berberine–baicalin nanoparticles (BB NPs) into a mixed matrix of sodium carboxymethylcellulose-carrageenan (CC). The superiority of this design is that this packaging film can utilize sunlight to generate reactive oxygen species, thus eradicating more than 99% of E. coli and S. aureus within 60 min. Also, this film can release BB NPs to inactivate bacteria under all weather conditions. Surprisingly, the CC/BB nanocomposite film presented excellent mechanical performances (29.80 MPa and 38.65%), hydrophobicity (117.8°), and thermostability. The nanocomposite film is validated to be biocompatible and effective in protecting chicken samples, so this work will provide novel insights to explore safe and efficient antibacterial food packaging.

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Section: ■ Methodsmentioning

confidence: 99%

“…Migration test: The migration of the packaging films was tested by using 3% acetic acid (w/v) aqueous solution as a food simulant . Briefly, pieces of film samples (10 mm × 10 mm) were immersed in 2 mL of the simulant for different time periods.…”

Section: Methodsmentioning

confidence: 99%

A Naturally Derived Nanocomposite Film with Photodynamic Antibacterial Activity: New Prospect for Sustainable Food Packaging

Zhe

et al. 2021

ACS Appl. Mater. Interfaces

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“…The water contact angles of PP and 6.4 wt% PP/nanoclay nanocomposite with a draw ratio of ×18.0 were measured with similar values of 121° and 119°, respectively, indicating a hydrophobic surface. Due to the high contact angle, that is, the hydrophobic surface, it is difficult for moisture to be adsorbed by the film surface or diffused into the film, thereby realizing high moisture barrier properties [ 35 ]. Thus, even under high RH conditions, the oxygen permeability of the PP/nanoclay nanocomposite was maintained without deterioration.…”

Section: Resultsmentioning

confidence: 99%

A Study on the Oxygen Permeability Behavior of Nanoclay in a Polypropylene/Nanoclay Nanocomposite by Biaxial Stretching

Jung

Kang

et al. 2021

Polymers

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Polypropylene (PP) has poor oxygen barrier properties, therefore it is manufactured in a multi-layer structure with other plastics and metals, and has been widely used as a packaging material in various industries from food and beverage to pharmaceuticals. However, multi-layered packaging materials are generally low in recyclability and cause serious environmental pollution, therefore we have faced the challenge of improving the oxygen barrier performance as a uni-material. In this work, PP/nanoclay nanocomposites were prepared at nanoclay contents ranging from 0.8 to 6.4 wt% by the biaxial stretching method, performed through a sequential stretching method. It was observed that, as the draw ratio increased, the behavior of the agglomerates of the nanoclay located in the PP matrix changed and the nanoclay was dispersed along the second stretching direction. Oxygen barrier properties of PP/nanoclay nanocomposites are clearly improved due to this dispersion effect. As the biaxial stretching ratio and the content of nanoclay increased, the oxygen permeability value of the PP/nanoclay nanocomposite decreased to 43.5 cc·mm/m2·day·atm, which was reduced by about 64% compared to PP. Moreover, even when the relative humidity was increased from 0% to 90%, the oxygen permeability values remained almost the same without quality deterioration. Besides these properties, we also found that the mechanical and thermal properties were also improved. The biaxially-stretched PP/nanoclay nanocomposite fabricated in this study is a potential candidate for the replacement of the multi-layered packaging material used in the packaging fields.

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“…A natural model to mimic might be leaf cuticles, which consist of cross‐linked hydroxylated fatty acids and waxes, better known as cutin and suberin (Pollard et al., 2008). Examples of these include thermal polymerization of cutins extracted from fruit peels (Heredia‐Guerrero et al., 2017), thermal polymerization of aleuritic acid (a major component of shellac) (Heredia‐Guerrero et al., 2017), paper coated with mixtures of palm oil and furfuryl alcohol (Zeng et al., 2020), and paper coated with a polyester formed by reacting epoxidized soybean oil with citric acid (Shogren, 1999).…”

Section: Surface Sizingmentioning

confidence: 99%

Per‐ and polyfluoroalkyl substances and their alternatives in paper food packaging

Glenn

Shogren

Jin

et al. 2021

Comp Rev Food Sci Food Safe

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Per‐ and polyfluoroalkyl substances (PFAS) have been used in food contact paper and paperboard for decades due to their unique ability to provide both moisture and oil/grease resistance. Once thought to be innocuous, it is now clear that long chain PFAS bioaccumulate and are linked to reproductive and developmental abnormalities, suppressed immune response, and tumor formation. Second‐generation PFAS have shorter biological half‐lives but concerns about health risks from chronic exposure underscore the need for safe substitutes. Waxes and polymer film laminates of polyethylene, poly(ethylene‐co‐vinyl alcohol), and polyethylene terephthalate are commonly used alternatives. However, such laminates are neither compostable nor recyclable. Lamination with biodegradable polymers, including polyesters, such as polylactic acid (PLA), polybutylene adipate terephthalate, polybutylene succinate, and polyhydroxyalkanoates, are of growing research and commercial interest. PLA films are perhaps the most viable alternative, but performance and compostability are suboptimal. Surface sizings and coatings of starches, chitosan, alginates, micro‐ and nanofibrilated cellulose, and gelatins provide adequate oil barrier properties but have poor moisture resistance without chemical modification. Plant proteins, including soy, wheat gluten, and corn zein, have been tested as paper coatings with soy being the most commercially important. Internal sizing agents, such as alkyl ketene dimers, alkenyl succinic anhydride, and rosin, improve moisture resistance but are poor oil/grease barriers. The difficulty in finding a viable replacement for PFAS chemicals that is cost‐effective, fully biodegradable, and environmentally sound underscores the need for more research to improve barrier properties and process economics in food packaging products.

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Facile Approach for Ecofriendly, Low-Cost, and Water-Resistant Paper Coatings via Palm Kernel Oil

Cited by 31 publications

References 44 publications

A Naturally Derived Nanocomposite Film with Photodynamic Antibacterial Activity: New Prospect for Sustainable Food Packaging

A Naturally Derived Nanocomposite Film with Photodynamic Antibacterial Activity: New Prospect for Sustainable Food Packaging

A Study on the Oxygen Permeability Behavior of Nanoclay in a Polypropylene/Nanoclay Nanocomposite by Biaxial Stretching

Per‐ and polyfluoroalkyl substances and their alternatives in paper food packaging

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