Effect of temperature, pressure and depressurization rate on release profile of salicylic acid from contact lenses prepared by supercritical carbon dioxide impregnation

2015 ◽  
Vol 100 ◽  
pp. 89-94 ◽  
Author(s):  
Yuta Yokozaki ◽  
Junichi Sakabe ◽  
Brendan Ng ◽  
Yusuke Shimoyama
Keyword(s):  
Carbon Dioxide ◽  
Salicylic Acid ◽  
Supercritical Carbon Dioxide ◽  
Contact Lenses ◽  
Release Profile ◽  
Effect Of Temperature ◽  
Supercritical Carbon

scholarly journals Effect of Temperature and Pressure on Surface Tension of Polystyrene in Supercritical Carbon Dioxide

2007 ◽  
Vol 111 (15) ◽  
pp. 3859-3868 ◽  
Author(s):  
H. Park ◽  
R. B. Thompson ◽  
N. Lanson ◽  
C. Tzoganakis ◽  
C. B. Park ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Surface Tension ◽  
Supercritical Carbon Dioxide ◽  
Effect Of Temperature ◽  
Temperature And Pressure ◽  
Supercritical Carbon

scholarly journals Study on the Changes of Structures and Properties of PAN Fibers during the Cyclic Reaction in Supercritical Carbon Dioxide

Polymers ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 402 ◽  
Author(s):  
Mengmeng Qiao ◽  
Haijuan Kong ◽  
Xiaoma Ding ◽  
Zhifeng Hu ◽  
Luwei Zhang ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Heating Temperature ◽  
Cyclization Reaction ◽  
Effect Of Temperature ◽  
High Heat Transfer ◽  
Structures And Properties ◽  
Ft Ir ◽  
Pan Fibers ◽  
Supercritical Carbon

Thermal pre-oxidation of polyacrylonitrile (PAN) fibers is a time-consuming and energy-consuming step in the production of PAN-based carbon fibers. In this paper, the effect of temperature on the structures and properties of PAN fibers cyclized in the supercritical carbon dioxide (Sc-CO2) medium was studied. The thermal behaviors of the PAN fibers were investigated by Fourier transform infrared spectra (FT-IR), X-ray diffraction (XRD), differential scanning calorimeter (DSC) and thermogravimetric analysis (TGA). The cyclization reaction was sensitive to the heating temperature and gas atmosphere. The FT-IR results of the PAN fibers treated in the Sc-CO2 confirmed that the degree of cyclization increased with the increase of the cyclization temperature. Compared with the PAN fibers treated in the air, the PAN fibers treated in the Sc-CO2 showed a higher degree of cyclization even at the same temperature. These findings might be related to the osmotic action of Sc-CO2 causing the fibers to be further arranged in a regular manner, which was favorable for the cyclization reaction. Moreover, as one kind of high diffusion and high heat transfer media, the heat release during the cyclization of PAN fibers could be quickly removed by Sc-CO2, which achieved the progress of the rapid-entry cyclization reaction.

Solubilities of salicylic acid in supercritical carbon dioxide with ethanol cosolvent

1996 ◽  
Vol 9 (2) ◽  
pp. 82-87 ◽  
Author(s):  
Jie Ke ◽  
Can Mao ◽  
Minghong Zhong ◽  
Buxing Han ◽  
Haike Yan
Keyword(s):  
Carbon Dioxide ◽  
Salicylic Acid ◽  
Supercritical Carbon Dioxide ◽  
Supercritical Carbon

The Solubility of Salicylic Acid in Supercritical Carbon Dioxide

2005 ◽  
Vol 43 (6) ◽  
pp. 854-858 ◽  
Author(s):  
R. N. Maksudov ◽  
A. E. Novikov ◽  
A. N. Sabirzyanov ◽  
F. M. Gumerov
Keyword(s):  
Carbon Dioxide ◽  
Salicylic Acid ◽  
Supercritical Carbon Dioxide ◽  
Supercritical Carbon
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