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CMC and CNF-based alizarin incorporated reversible pH-responsive color indicator films
被引:137
|作者:
Ezati, Parya
[1
,2
]
Rhim, Jong-Whan
[1
]
Moradi, Mehran
[2
]
Tajik, Hossein
[2
]
Molaei, Rahim
[2
]
机构:
[1] Kyung Hee Univ, Dept Food & Nutr, BioNanocomposite Res Ctr, 26 Kyungheedae Ro, Seoul 02447, South Korea
[2] Urmia Univ, Dept Food Hyg & Qual Control, Fac Vet Med, Orumiyeh, Iran
基金:
新加坡国家研究基金会;
关键词:
Alizarin;
CMC;
CNF;
pH-responsive;
Color change;
Smart packaging;
CELLULOSE NANOCRYSTALS;
AMMONIUM PERSULFATE;
D O I:
10.1016/j.carbpol.2020.116614
中图分类号:
O69 [应用化学];
学科分类号:
081704 ;
摘要:
Smart color-changing indicator films were prepared using two different types of cellulose (CMC and CNF) and pH-sensitive dye, alizarin. pH-responsive color indicator films were produced by ionization and deprotonation of hydroxyl groups of alizarin phenolic compounds. The X-ray diffraction pattern of the color indicator film showed a new weak diffraction peak at 2 theta = 13 degrees, indicating the semi-crystalline character of alizarin. The indicator film showed UV-vis light screening properties and radical scavenging activity with enhanced thermal stability. The indicator film showed a distinct color change of alizarin from yellow to purple in the pH range of 2-12. In addition, the color indicator film showed stable and reversible color changes even after repeated changes in environmental pH. The pH-responsive color indicator films are likely to be used as an acid or base gas sensor due to the rapid response and reversible color change to the pH change in the packaging environment.
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页数:8
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