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Instant strong and responsive underwater adhesion is significant for many biomedical, industrial, and household applications. However, underwater adhesives simultaneously possessing these advantages are challenging to fabricate because strong and responsive adhesions are usually opposing properties. Herein, we have prepared bioinspired supramolecular polymeric adhesives containing complementary nucleobase moieties in nucleic acids and have demonstrated instantaneous underwater adhesion with an adhesion strength reaching as high as 1.5 MPa. Strong underwater adhesion is attributed to the high capability of the adhesives to substantially remove the interfacial water, which can be further modulated by temperature, light, and pH. Excellent underwater adhesion performances have been achieved on various substrates and under distinct aqueous conditions, showcasing the wide applications of the bioinspired nucleobase-containing adhesives developed here. This work opens up a new opportunity for fabricating underwater adhesives for diverse applications with the combined advantages of instant strong and responsive adhesion.

Renewable plant oil-based polymeric materials are promising to replace current petroleum-based polymers, considering its low cost and renewability. However, weak intermolecular interaction within the plant oil-based polymeric materials usually gives...

About 40−50% of perishable products such as fruits and vegetables are wasted without consumption owing to the short shelf life and uncontrolled storage and transportation conditions. To address this issue, conventional methods including refrigeration, irradiation, controlled atmosphere storage, and surface coatings are often harnessed. However, these methods will probably change both the appearance and flavor of food or give rise to potential safety concerns and health risks. In this work, we have successfully fabricated plant oil-based polymer-coated films as passively modified packaging for the preservation of perishable products. Two Camellia oil-based monomers with N-methyl and amide groups were polymerized to produce various plant oil-based polymers. The obtained plant oil-based polymers present distinct capacity for the formation of hydrogen bonding, leading to tunable gas permeability and selectivity for the films coated with plant oilbased coatings. Good appearance, low water loss, high firmness, and total soluble solid contents were observed for the perishable food when sealed with the plant oil-based polymer-coated films. This method is universal and applicable to different fruits and vegetables either nonclimacteric or climacteric such as cherries, waxberries, tomatoes, and cucumbers. Therefore, passively modified atmosphere packaging films by coating plant oil-based polymers to modulate the CO 2 /O 2 selectivity are a safe and efficient candidate for the preservation of perishable food.

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