Preparation, Characterization and Application of a Low Water-Sensitive <i>Artemisia sphaerocephala</i> Krasch. Gum Intelligent Film Incorporated with Anionic Cellulose Nanofiber as a Reinforcing Component

• Main Authors: Tieqiang Liang, Lijuan Wang
• Format: Article
• Language: English
• Published: MDPI AG 2020-01-01
• Series: Polymers
• Subjects: <i>artemisia sphaerocephala</i> krasch. gum; anionic cellulose nanofiber; red cabbage extracts; ph-sensing film; low water-sensitivity
• Online Access: https://www.mdpi.com/2073-4360/12/1/247

A low-water-sensitive <i>Artemisia sphaerocephala</i> Krasch. gum (ASKG) based intelligent film was developed. Red cabbage extracts (RCE) was selected as a natural pH-sensitive indicator, and anionic cellulose nanofiber (ACNF) was added as a hydrophobic and locking host. The zeta potential, rheology, Fourier-transform infrared spectroscopy, X-ray diffractometry, and release results indicated that the RCE was locked by the ACNF via electrostatic interactions, moreover, broke the original complicated network and ordered arrangement of polymer molecules in the developed intelligent films. RCE addition decreased the tensile strength, oxygen, and water vapor barrier properties and light transmission of the developed intelligent films, while increasing the elongation at break. The films could respond to buffer solutions and NH₃ through different color changes. The developed intelligent film was hydrophobic, which could precisely detect the freshwater shrimp freshness in real time via color changes, which indicated that the films have potential in intelligent packaging and gas-sensing label fields.