Optical properties and colorimetry of gelatine gels prepared in different saline solutions

被引:16
作者
Basha, Mohammad A. F. [1 ]
机构
[1] Cairo Univ, Fac Sci, Phys Dept, POB 12613, Giza, Egypt
关键词
Gelatine; Transition metals; Fourier transform infrared spectroscopy; Thermogravimetric analysis; Optical properties; Colour parameters; TRANSITION-METAL COMPOUNDS; COMPOSITE; TOXICITY; CHROMIUM; COLLAGEN; CHLORIDE; BLENDS; COLOR; SALT;
D O I
10.1016/j.jare.2018.12.002
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Gelatine has been widely used in many multidisciplinary research fields due to its biocompatibility. Using saline solutions in the gelation of gelatine allows for new properties to be incorporated into the prepared gels. This study examined the optical and colour properties of gelatine gels prepared in saline solutions, containing three different metal chlorides (NiCl2 center dot 6H(2)O, CoCl2 center dot 6H(2)O, and CrCl3 center dot 6H(2)O) with concentrations of up to 50%, to prepare three groups of gels. FTIR spectroscopy indicated a loss in the helical structure of the metal-containing gelatine gels, and a shift in the amide bands towards lower wavenumbers. From the thermogravimetric analysis (TGA), the starting degradation temperatures (SDTs) of the prepared gelatine gels were found to be correlated to the concentration of the gelling solutions. All SDTs were above 250 degrees C, making these gels suitable for standing temperatures beyond the daily range. UV-vis spectroscopy showed that d-d transitions were responsible for the colour properties of the metal-containing gelatine gels. It is concluded that the studied properties and the measured parameters were found to depend on both salt type and concentration. With the current findings, the prepared gels can be used as optical thermometers, colour-selective corner cube retroreflectors, laser components, and coatings for OLEDs. (C) 2018 The Author. Published by Elsevier B.V. on behalf of Cairo University.
引用
收藏
页码:55 / 65
页数:11
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