Study on Thermooxidative Degradation of Poly(Vinyl Alcohol)/Silica Nanocomposite Prepared with SAM Technique

2005 ◽  
Vol 23 ◽  
pp. 375-378 ◽  
Author(s):  
Zheng Peng ◽  
Ling Xue Kong ◽  
Si Dong Li
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Fourier Transform Infrared Spectroscopy ◽  
Self Assembly ◽  
Vinyl Alcohol ◽  
Fourier Transform Infrared ◽  
Degradation Process ◽  
Poly Vinyl Alcohol ◽  
Thermooxidative Degradation ◽  
Thermooxidative Stability

The thermooxidative degradation of poly (vinyl alcohol)/silica (PVA/SiO2) nanocomposite prepared with self-assembly monolayer (SAM) technique is investigated by using a thermogravimetry (TG) and Fourier transform infrared spectroscopy coupled thermogravimetry (FTIR/TG). The results show that although the thermooxidative degradation process of prepared nanocomposite is similar to that of the pure PVA, its thermooxidative stability has been greatly improved.

Fabrication of Electrospun Persian Gum/Poly (Vinyl Alcohol) and Whey Protein Isolate/Poly (Vinyl Alcohol) Nanofibers Incorporated with Oliveria decumbens Vent. Essential Oil

2019 ◽  
Vol 9 (3) ◽  
pp. 371-380
Author(s):  
Malihe Keramat ◽  
Sara Esteghlal ◽  
Javad Safari ◽  
Mohammad-Taghi Golmakani ◽  
Mohammadreza Khalesi
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Essential Oil ◽  
Fourier Transform Infrared Spectroscopy ◽  
Whey Protein ◽  
Vinyl Alcohol ◽  
Fourier Transform Infrared ◽  
Whey Protein Isolate ◽  
Protein Isolate ◽  
Poly Vinyl Alcohol

Introduction: In this study, Persian gum/poly (vinyl alcohol) nanofiber and whey protein isolate/ poly (vinyl alcohol) nanofiber were fabricated using electrospinning system. Materials & Methods: The effects of supplementation of Oliveria decumbens Vent. essential oil on the physicochemical and biological characteristics of the nanofibers were investigated by applying the techniques including antioxidant activity measurement, scanning electron microscopy, viscosity and conductivity tests, and fourier-transform infrared spectroscopy. Results: The results showed that the incorporation of 1% Oliveria decumbens Vent. essential oil to the polymer dispersions causes the formation of thin nanofibers with the least beads. Both types of nanofibers containing essential oil exhibited significant radical scavenging activities up to 76.82±0.36% and 61.09±0.13% for whey protein isolate/poly (vinyl alcohol) nanofiber and Persian gum/poly (vinyl alcohol) nanofiber, respectively. Conclusion: The results of fourier-transform infrared spectroscopy proposed the structurally incorporation of the essential oil into nanofibers to be considered as novel coating film for active packaging technology.

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