Photografting Coating: An Innovative Approach to “Non‐Migratory” Active Packaging

Abstract

The increasing trend of sustainability (single‐use packaging), safety (fresh consumption), and convenience (processing and application) in packaging science has created a high demand for packaging materials with advanced functions. Thus, the challenges involved with conventional active packaging, for example, migration, low efficiency, upscaling difficulty, safety, and regulations should be addressed through an industrial scalable method, such as photografting coating. Photografting coating, which involves a strong surface covalent linkage, can be employed for preparing novel “non‐migratory” active packaging systems with strong antimicrobial and self‐cleaning, antifouling and self‐defensive, metal chelating as antioxidant, free‐radical scavenging as antioxidant, biocatalytic, and easy printing properties. Herein, profound insights into the technique of photografting coating are provided, with a focus on its application potential in non‐migratory active packaging. The scientific explanation for the photografting coating technique and its application feasibility are illustrated to introduce its potential to confer new functions onto packaging materials. Furthermore, the recent progress, application functions, process, and safety challenges, as well as future directions of photografting coating in the preparation of non‐migratory active packaging systems are explored in detail.

Advancements in Biodegradable Active Films for Food Packaging: Effects of Nano/Microcapsule Incorporation

“…Eventually, biodegradable film packaging containing capsules has great potential to meet the needs of three main goals of developed packaging science, comprising sustainability, safety, and convenience [ 31 , 313 ]. Recent progress in the incorporation of nano/microencapsulated natural agents into active food packaging systems is summarized in Table 3 .…”

Biodegradable Active Packaging with Controlled Release: Principles, Progress, and Prospects

“…However, the toxicity of the added compound should also be investigated, for example, by using the threshold of toxicological concern (TTC) method . Sadeghi and Seo (2021) recently published a paper describing “Photografting coating”, which employed a strong covalent linkage between the active compound and the packaging in order to prevent migration altogether and overcome safety concerns . They described that polymerization-based grafting to or from the film is also likely to prevent sensory changes to food .…”

“…Sadeghi and Seo (2021) recently published a paper describing “Photografting coating”, which employed a strong covalent linkage between the active compound and the packaging in order to prevent migration altogether and overcome safety concerns . They described that polymerization-based grafting to or from the film is also likely to prevent sensory changes to food . Using this method, vanillin was grafted to a PET film and was found to be active against Gram-positive bacteria …”

Anti‐browning active packaging: A review on delivery mechanism, mode of action, and compatibility with biodegradable polymers

“…Leaching of inhibitors could occur due to poor properties of the AP as the consequence of weak intramolecular force interaction, which creates spaces for inhibitors to diffuse out from the polymer matrix. (Sadeghi & Seo, 2021). Inhibitors that do not interact well with the polymer matrix tend to be excluded resulting in excessive leaching.…”