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Application US20180340049
Published 2018-11-29
Packaging Material And Methods Of Using The Same
The present disclosure is directed to films. The films can include polyamic acid (PAA). Methods of making and using the film for food product coverings is also included.
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- 1. A film comprising:
polyamic acid (PAA); glutaraldehyde (GA); and one or more of alanine (A), tryptophan (W), 2-benzylbenzoyl (BB), Polycaprolactone (PCl), L-Cysteine (C), D-glucosamine (DA), dipropylene glycol (DP), p-aminobenzoic acid (pAB), L-isoleucine (I), p-aminosalicylic acid (pAS), sulfanilic acid (SA), 5-aminosalicylic acid (5AS).
- 17. A method of making a film, comprising:
mixing 4,4′-oxydianiline and PMDA to form a first mixture; heating the first mixture to form a second mixture comprising polyamic acid (PAA); adding glutaraldehyde (GA) to the second mixture and adding one or more of alanine (A), tryptophan (W), 2-benzylbenzoyl (BB), Polycaprolactone(PCl), L-Cysteine (C), D-glucosamine (DA), dipropylene glycol (DP), p-aminobenzoic acid (pAB), L-isoleucine (I), p-aminosalicylic acid (pAS), sulfanilic acid (SA), 5-aminosalicylic acid (5AS) to the second mixture, to form a third mixture; and forming a film after a predetermined time of incubation.
- 24. A method of packaging a food material, the method comprising:
covering at least a portion of the food material with a film, the film comprising polyamic acid (PAA) and glutaraldehyde (GA).
- 27. A method of monitoring food spoilage of a food product, the method comprising:
applying a polyamic acid (PAA) film to at least a portion of the food product; and monitoring the film for a change in at least one of a color of the film and a conductivity of the film.
- 29. A film comprising:
polyamic acid (PAA); a cross-linker; and a small molecule.
- 36. A method of making a film, comprising:
mixing a plasticizer and PMDA to form a first mixture, heating the first mixture to form a second mixture comprising polyamic acid (PAA), and incubating the second mixture for a predetermined time, wherein the second mixture, after the predetermined time of incubation, forms a film.
