Journal
MEMBRANES
Volume 11, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/membranes11040242
Keywords
pH-sensing film; cellulose nanocrystal; barrier properties; stability
Categories
Funding
- Foundation of State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences [KF201905]
- Jiangsu Provincial Key Laboratory and Paper Science and Technology [KL201906]
- Postgraduate Research & Practice Innovation Program of Jiangsu Province [KYCX18_1825]
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Intelligent packaging films play an important role in food preservation and freshness detection. The addition of cellulose nanocrystals can significantly improve the properties of pH-sensing films and expand their application range.
As an important functional material in food industry, intelligent packaging films can bring great convenience for consumers in the field of food preservation and freshness detection. Herein, we fabricated pH-sensing films employing hydroxypropyl guar (HPG), 1-butyl-3-methylimidazolium chloride (BmimCl), and anthocyanin (Anth). Besides, the effects of adding cellulose nanocrystals (CNC) into the composite films upon the films' structures and physicochemical properties are elucidated. The addition of CNC promoted more compact film structures. Moreover, CNC dramatically improved several properties of the pH-sensing films, including the distinguishability of their color changes, sensitivity to pH, permeability to oxygen and water vapor, solvent resistance, durability, and low-temperature resistance. These results expand the application range of pH-sensing films containing CNC in the fields of food freshness detection and intelligent packaging.
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