Food-Safe Chitosan–Zein Dual-Layer Coating for Water- and Oil-Repellent Paper Substrates

Kansal, Dhwani; Hamdani, Syeda Shamila; Ping, Ruoqi; Sirinakbumrung, Nopphachai; Rabnawaz, Muhammad

doi:10.1021/acssuschemeng.0c02216

Cited by 56 publications

(31 citation statements)

References 39 publications

(47 reference statements)

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“…9 To address the above challenges, our group is actively working towards developing plastic-free, PFAS-free, costeffective water-and oil-resistant surfaces. [10][11][12][13][14][15] One of the key focus is the use of benign polydimethylsiloxane (PDMS) as an alternative to PFAS because PDMS is known for imparting water and oil repellent properties while still acceptable for food contact applications. [16][17][18][19][20][21][22] In a recent breakthrough study, we reported the fabrication of water-and grease-resistant coating using Chitosan-grafted-PDMS (Chitosan-g-PDMS), and the coated paper was 100% recyclable by washing the coating off.…”

Section: Introductionmentioning

confidence: 99%

Oil‐ and water‐resistant paper substrate using blends of chitosan‐graft‐polydimethylsiloxane and poly(vinyl alcohol)

Nair

Kansal

Khan

et al. 2021

J of Applied Polymer Sci

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Reported herein is an economical, plastic-and fluorine-free coating approach for oil and water repellent paper substrates using blends of poly(vinyl alcohol) and chitosan-graft-polydimethylsiloxane copolymer. The obtained coated paper showed good water-resistance, as evidenced by its low Cobb60 values of 20 ± 2.1 g/m 2 and high water contact angles of 119 ± 6.3. The kit rating of the coated paper was 7.6/12, indicating decent grease-resistant properties as compared to the kit value of 0/12 for the uncoated paper. The coated paper is also repulpable as demonstrated by the complete washing off the coating from the coated paper. Giving the cost-effective nature of the coating materials and good water and oil-resistant properties of the coated paper, the approach developed here is commercially viable, and will offer a multitude of environmental benefits such as the elimination of microplastic-and PFAS problems associated with existing paper coatings.

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Section: Introductionmentioning

confidence: 99%

Oil‐ and water‐resistant paper substrate using blends of chitosan‐graft‐polydimethylsiloxane and poly(vinyl alcohol)

Nair

Kansal

Khan

et al. 2021

J of Applied Polymer Sci

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“…[ 2 ]. Traditional paper has poor oil resistance due to the presence of porous structure and polar hydroxyl groups in the molecule chains of cellulosic fibers [ 3 ]. Therefore, treatment with lamination, low surface energy reagent is often used to solve the problem [ 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

“…However, the micromolecules of synthetic polymers can migrate from a paper container to foods, which is harmful for human health [ 8 , 9 ]. Using low surface energy chemicals per- and polyfluoroalkyl substrates (PFAS) and silicone oils is another way of improving the oil resistance of paper [ 3 , 10 ]. However, PFAS have a huge threat to human health due to their toxicity and the degradation difficulty [ 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

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Chitosan/Montmorillonite Coatings for the Fabrication of Food-Safe Greaseproof Paper

Wang

Zhao

2021

Polymers

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Here, we report a non-toxic method for improving the oil-resistant performance of chitosan coated paper by coating the mixture of chitosan and montmorillonite (MMT) instead of coating chitosan solution only. Through combining MMT into the chitosan coatings, the coated paper exhibited a lower air permeability and enhanced oil resistance under a lower coating load. For coated papers C2.5 and C3 by coating 2.5% (w/v) and 3% (w/v) chitosan without adding MMT in the chitosan coating, the coating load was 3.76 g/m2 and 3.99 g/m2, respectively, and the kit rating values were only 7–8/12. Regarding the sample C2M0.1 coated by the mixed solution containing 2% (w/v) chitosan and 0.1% (w/v) MMT, its coating load was only 3.65 g/m2, the paper permeability after coating was reduced to 0.00507 μm/Pa·s, owing to the filling of MMT into the cellulosic fibers network, and the kit rating reached 9/12. Moreover, C2M0.1 showed improved mechanical properties, whereby its tearing resistance was 5.2% and 6.6% higher than that of the uncoated paper in the machine direction and the cross direction, respectively.

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“…Laminates that are applied onto paper substrates also leak into the environment (e.g., waterways, soil, and air) and form microplastics upon abrasion, thus posing an emerging threat to ecosystems. Biodegradable coated paper is achievable by various methods, including chemical modifications 3,4 as well as the use of multilayers (with PDMS, zein, or caseinate as a top layer) [5][6][7] and emulsions (with starch or curdlan). [8][9][10] However, the water and gas barrier properties of these coated paper substrates are too weak for most practical applications.…”

Section: Introductionmentioning

confidence: 99%

Oxygen and water vapor barrier properties of polyvinyl alcohol and zein bilayer‐coated paper

Hamdani

Ping

et al. 2021

J of Applied Polymer Sci

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As reported herein, a bilayer coating approach using poly(vinyl alcohol) (PVOH) and zein is employed to enhance the water vapor and oxygen barrier properties of paper materials. The coating was applied onto three different types of paper substrates to study the general applicability of this approach. The bilayer-coated paper samples exhibited a reduction of up to 65% in their water vapor transmission rate in comparison to the corresponding uncoated paper substrates at 23 C and 50% relative humidity. In addition, the bilayer-coated paper samples showed at least a 40-fold decrease in oxygen transmission rate from that of the uncoated paper samples. In addition, the coated paper showed excellent thermal stability and mechanical properties. Scanning electron microscopy confirmed that the obtained coated paper has a smooth texture without pores. Pulp was recovered from the coated paper by washing with water/ethanol. Thus, this work provides a unique coated paper with excellent barrier properties and therefore has the potential for real-world application as an alternative to single-use plastics.

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Food-Safe Chitosan–Zein Dual-Layer Coating for Water- and Oil-Repellent Paper Substrates

Cited by 56 publications

References 39 publications

Oil‐ and water‐resistant paper substrate using blends of chitosan‐graft‐polydimethylsiloxane and poly(vinyl alcohol)

Oil‐ and water‐resistant paper substrate using blends of chitosan‐graft‐polydimethylsiloxane and poly(vinyl alcohol)

Chitosan/Montmorillonite Coatings for the Fabrication of Food-Safe Greaseproof Paper

Oxygen and water vapor barrier properties of polyvinyl alcohol and zein bilayer‐coated paper

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