Ultrasound-Assisted Alkaline Hydrolysis of Waste Poly(Ethylene Terephthalate) in Aqueous and Non-aqueous Media at Low Temperature

2017 ◽  
Vol 60 (2) ◽  
pp. 122-140 ◽  
Author(s):  
Chandrakant Sharad Bhogle ◽  
Aniruddha Bhalchandra Pandit
Keyword(s):  
Low Temperature ◽  
Alkaline Hydrolysis ◽  
Ethylene Terephthalate ◽  
Aqueous Media ◽  
Poly Ethylene Terephthalate ◽  
Ultrasound Assisted ◽  
Poly Ethylene ◽  
Hydrolysis Of

Studies on the Depolymerization of Poly(ethylene terephthalate) Using 1, 1, 2, 2-Tetramethyl-1-Benzyl-2-n-Octyl Ethylene-1, 2-Diammonium Bromide Chloride as Phase Transfer Catalyst

2014 ◽  
Vol 938 ◽  
pp. 164-169
Author(s):  
V. Lakshmi Narayanan ◽  
M.J. Umapathy
Keyword(s):  
Alkaline Hydrolysis ◽  
Zinc Sulfate ◽  
Ethylene Terephthalate ◽  
Phase Transfer ◽  
Phase Transfer Catalyst ◽  
Dimethyl Benzyl ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene ◽  
Hydrolysis Of ◽  
New Phase

1,4-Bis (dimethyl) benzyl octyl ethylene diammonium bromide chloride has been synthesized, characterized and applied as new phase transfer catalyst in the alkaline hydrolysis of PET leading to depolymerisation. The new phase transfer catalyst has been compared with the alkaline hydrolysis of PET using zinc sulfate as catalyst in the depolymerization. It was found that the newly synthesized phase transfer catalyst exhibited excellent conversion than the alkaline hydrolysis of PET using zinc sulfate as catalyst.

A kinetic study of the depolymerisation of poly(ethylene terephthalate) by phase transfer catalysed alkaline hydrolysis

2009 ◽  
Vol 84 (1) ◽  
pp. 92-99 ◽  
Author(s):  
R. López-Fonseca ◽  
M. P. González-Marcos ◽  
J. R. González-Velasco ◽  
J. I. Gutiérrez-Ortiz
Keyword(s):  
Kinetic Study ◽  
Alkaline Hydrolysis ◽  
Ethylene Terephthalate ◽  
Phase Transfer ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

Modifying the surface of poly(ethylene terephthalate) nanofibrous materials by alkaline treatment and TiO2 nanoparticles

2017 ◽  
Vol 47 (8) ◽  
pp. 1944-1958 ◽  
Author(s):  
Ali Karimi ◽  
Hossein Izadan ◽  
Akbar Khoddami ◽  
Seyed A Hosseini
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Alkaline Hydrolysis ◽  
Ethylene Terephthalate ◽  
X Ray Diffraction ◽  
X Ray ◽  
Poly Ethylene Terephthalate ◽  
Dye Absorption ◽  
Poly Ethylene ◽  
Scanning Electron

The mutual effects of nano-TiO2 and alkaline hydrolysis on the morphology, chemical structure, water absorption, and the dyeing behavior of poly(ethylene terephthalate) nanofibers were investigated via employing scanning electron microscope, Fourier Transform Infra Red Spectroscopy (FTIR) and X-ray diffraction, and measuring water contact angle, 3M repellency, and dye absorption. A direct relation between the alkaline hydrolysis rate and nanofibers hydrophilicity was observed, while the addition of the nano-TiO2 led to more hydrophobicity. However, the alkaline hydrolysis had the prominent effect. FTIR spectra illustrated no chemical interaction between the nanoparticles and nanofibers. It was also shown that the dye absorption at dyeing equilibrium and the rate of dyeing were increased by the presence of the nano-TiO2 and these effects were intensified by the alkaline hydrolysis. These observations were related to the reduction in the nanofibers diameter and the increase in the surface roughness, as evidenced in the scanning electron microscope, and the increase in the amorphous regions of the nanofibers, as shown by the X-ray diffraction diffractograms.

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