An O2 smart plastic film for packaging

被引:44
作者
Mills, Andrew [1 ]
Lawrie, Katherine [1 ]
Bardin, Julie [2 ]
Apedaile, Alistair [2 ]
Skinner, Graham A. [2 ]
O'Rourke, Christopher [1 ]
机构
[1] Queens Univ Belfast, Sch Chem & Chem Engn, Belfast BT9 5AG, Antrim, North Ireland
[2] Univ Strathclyde, Dept Pure & Appl Chem, WestCHEM, Glasgow G1 1XL, Lanark, Scotland
基金
英国工程与自然科学研究理事会;
关键词
HETEROGENEOUS PHOTOCATALYSIS; INTELLIGENCE INK; OXYGEN INDICATOR; SENSOR; WATER; FOOD;
D O I
10.1039/c1an15774d
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
The preparation and characterisation of a novel, water-proof, irreversible, reusable, UV-activated, O-2 sensitive, smart plastic film is described. A pigment, consisting of a redox dye, methylene blue (MB), and a sacrificial electron donor, DL-threitol, coated onto an inorganic support with semiconductor functionality, TiO2, has been extruded in low-density polyethylene (LDPE). The blue-coloured indicator is readily photobleached in <90 s using UVA light (4 mWcm(-2)), whereby MB is converted to its colourless, leuco form, leuco-methylene blue (LMB). This form persists in the absence of oxygen, but is re-oxidised to MB in similar to 2.5 days in air under ambient conditions (similar to 21 degrees C, similar to 65% RH) within the O-2 smart plastic film. The rate of recovery is linearly dependent upon the ambient level of O-2. At the lower temperature of 5 degrees C, the kinetics of the photobleaching activation step is largely unchanged, whereas that of recovery is markedly reduced to t(1/2) = 36 h at 5 degrees C (cf. 9 h at 21 degrees C); the activation energy for the recovery step was calculated as 28 kJmol(-1) The O-2-sensitive recovery step was found to be moderately dependent upon humidity at 21 degrees C, but not significantly dependent upon humidity at 5 degrees C. The possible application of this type of indicator in food packaging is illustrated and discussed briefly.
引用
收藏
页码:106 / 112
页数:7
相关论文
共 42 条
[1]   Dual fluorescence sensor for trace oxygen and temperature with unmatched range and sensitivity [J].
Baleizao, Carlos ;
Nagl, Stefan ;
Schaeferling, Michael ;
Berberan-Santos, Mario N. ;
Wolfbeis, Otto S. .
ANALYTICAL CHEMISTRY, 2008, 80 (16) :6449-6457
[2]   EVIDENCE FOR TRIMERIZATION IN AQUEOUS SOLUTIONS OF METHYLENE BLUE [J].
BRASWELL, E .
JOURNAL OF PHYSICAL CHEMISTRY, 1968, 72 (07) :2477-&
[3]  
Brody A. L., 2001, ACTIVE PACKAGING FOO, DOI DOI 10.1201/9780367801311
[4]  
*CIE CENTR BUR, 2004, COL
[5]   Modification of water vapour transfer rate of low density polyethylene films for food packaging [J].
Dirim, SN ;
Özden, HÖ ;
Bayindirli, A ;
Esin, A .
JOURNAL OF FOOD ENGINEERING, 2004, 63 (01) :9-13
[6]   A novel luminescence-based colorimetric oxygen sensor with a "traffic light" response [J].
Evans, RC ;
Douglas, P ;
Williams, JAG ;
Rochester, DL .
JOURNAL OF FLUORESCENCE, 2006, 16 (02) :201-206
[7]   DIFFUSE REFLECTANCE MEASUREMENTS BY INFRARED FOURIER-TRANSFORM SPECTROMETRY [J].
FULLER, MP ;
GRIFFITHS, PR .
ANALYTICAL CHEMISTRY, 1978, 50 (13) :1906-1910
[8]  
GARNER CD, 1996, Patent No. 2298273
[9]  
HATAKEYAMA H, 2000, Patent No. 20006676901
[10]   Heterogeneous photocatalysis: State of the art and present applications [J].
Herrmann, JM .
TOPICS IN CATALYSIS, 2005, 34 (1-4) :49-65