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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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Dyeing of a poly(vinyl alcohol) (PVA) film with a high degree hydrolysis (>98%) using Direct Black 22, a dichroic organic dye, was investigated under various conditions (dye concentration, salt ($Na_2SO_4$) concentration, and temperature). This process could correctly be analyzed using the Freundlich isotherm ($C_{film}=K_FC_{soln}{^{1/n}}$) based on the pore model. The Freundlich exponent 1/n appeared to be constant over a broad range of salt concentrations, but the Freundlich constant $K_F$ assumed the maximum value for $[Na_2SO_4]={\sim}0.010M$. However, this value was 10 times greater than that under the no-salt conditions. Analysis of the adsorption kinetics revealed that only the early stage of dyeing was followed second-order, with an activation energy of 50.2 kJ/mol. However, gradual deviation from the second-order occurred with an increase in the dyeing time. These results indicated that the surfaces of the inner pores in the PVA film are dyed through multilayer adsorption, which is accompanied by complicated kinetics.
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참고문헌 (22)
참고문헌 신청
C. A. Finch / 1992 / Poly(vinyl alcohol) : Development / John Wiley :1~31
J. P. Kim / 2004 / Manufacture of Highly Functional PVA Film and Its Application to Polarizing Film / Polym Sci Technol 15:31~37
E. J. Shim / 2008 / Making Poly(vinyl alcohol)Film Iodinated at Solution State before Casting and Its Application / J Appl Polym Sci 109:1143~1149
W. S. Lyoo / 2003 / Effect of Molecular Weight of Poly(vinyl alcohol) on the Water Stability of a Syndiotactic Poly(vinyl alcohol)/Iodine Complex Film / Colloid Polym Sci 281:416~422
Y. Dirix / 1995 / Optical Properties of Oriented Polymer/dye Polarizers / Macromolecules 28:486~491
J. P. Kim / 2004 / Manufacture of Highly Functional PVA Film and Its Application to Polarizing Film / Polym Sci Technol 15:31~37
E. J. Shim / 2008 / Making Poly(vinyl alcohol)Film Iodinated at Solution State before Casting and Its Application / J Appl Polym Sci 109:1143~1149
W. S. Lyoo / 2003 / Effect of Molecular Weight of Poly(vinyl alcohol) on the Water Stability of a Syndiotactic Poly(vinyl alcohol)/Iodine Complex Film / Colloid Polym Sci 281:416~422
Y. Dirix / 1995 / Optical Properties of Oriented Polymer/dye Polarizers / Macromolecules 28:486~491
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