Abstract
A thermo-responsive membrane was developed by adsorbing the binary liquid crystals (LC) onto the cellulose nitrate membrane. The binary LC mixture is consisted of 36% cholesteric oleyl carbonate (COC) and 64% cholesteryl nonanoate (CN). The physico-chemical and the thermo-responsive properties of this binary LC adsorbed-membrane were examined. The results indicate that the adsorption behavior of binary LC mixture on the cellulose membrane was quick and reached to the equilibrium about 10 min, and linearly correlated with the increase of LC concentration used. The hydrophilic membrane was hydrophobicized after adsorption of binary LC mixture. The focal conic fan textures of binary LC mixture were observed from the surface of cellulose membrane. Due to the obedience and reproducibility of the binary LC used, the binary LC mixture-adsorbed membrane continuously exhibited an on-off thermo-responsive sensitivity to control the drug penetration.
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References
Bruguerolle, B., “Chronopharmacokinetics: Current Status,” Clin, Pharmacokinet., 35, 83-94 (1998).
Chen, K.S., Y.Y. Lin, and S.Y. Lin, “Thermally On-Off' Switching Nylon Membrane for Controlling Drug Penetration,” Drug Delivery System (Japan), 11, 55-611 (1996).
Delic J.I., P.D. Lilly, A.J. MacDonald, and G.D. Loizou, “The Ultility of PBPK in the Safety Assessment of Chloroform and Carbon Tetrachloride,” Reg. Toxicol. Pharmacol., 32, 144-155 (2000).
D'Emanuele, A., “Responsive Polymeric Drug Delivery,” Clin. Pharmacokinet., 41, 241-245 (1996).
Griffen, C.W. and R.S. Porter, “Phase Studies on Binary Systems of Cholesteryl Ester: A Two Aliphatic Ester Pairs,” Mol. Cryst. Liq. Cryst., 21, 77-98 (1973).
Kajiyama, T., Y. Nagata, S. Washizu, and M. Takayagi, “Characterization and Gas Permeation of Polycarbonate/Liquid Crystal Composite Membrane,” J. Membrane Sci., 11, 39-52 (1982).
Lemmer, B., “Chronopharmacological Aspects of PK/PD Modeling,” Int. J. Clin. Pharmacol. Ther., 35, 458-464 (1997).
Levi, E., “Chronotherapy for Gastrointestinal Cancers,” Curr. Opin. in Oncol., 8, 334-341 (1996).
Lin, S.Y., Y.Y. Lin, and K.S. Chen, “Thermo-Responsive Function of Liquid Crystal-Embedded Cellulose Nitrate Membrane Influenced by Pore Size of Membrane,” Pharm. Pharmacol. Lett., 5, 159-161 (1995).
Lin, Y.Y., K.S. Chen, and S.Y. Lin, “Development and Investigation of a Thermo-Responsive Cholesteryl Oleyl Carbonate-Embedded Membrane,” J. Control. Rel., 41, 163-170 (1996a).
Lin, S.Y., Y.Y. Lin, and K.S. Chen, “Permeation Behavior of Salbutamol Sulfate through Hydrophilic and Hydrophobic Membranes Embedded by Thermo-Responsive Cholesteryl Oleyl Carbonate,” Pharm. Res., 13, 914-919 (1996b).
Lin, S.Y., K.S. Chen, and Y.Y. Lin, “pH of Preparations Affecting the On-Off Drug Penetration Behavior through the Thermo-Responsive Liquid Crystal-Embedded Membrane,” J. Control. Rel., 55, 13-20 (1998).
Lin, S.Y., K.S. Chen, and Y.Y. Lin, “Artificial Thermo-Responsive Membrane Able to Control On-Off Switching Drug Release Through Nude Mice Skin Without Interference from Skin-Penetrating Enhancers,” J. Bioact. Comp. Polym., 15, 170-181 (2000a).
Lin, S.Y., H.Y. Tseng, and M.J. Li, “Phase Studies and Thermal Stability of Binary Systems of Cholesteric Liquid Crystals,” Appl. Phys. A., 70, 663-668 (2000b).
Plaa, G.L., “Chlorinated Methanes and Liver Injury: Highlights of the PastYears,” Annu. Rev. Pharmacol. Toxicol., 40, 42-65 (2000).
Tai, H.S. and J.Y. Lee, “Phase Transition Behaviors and Selective Optical Properties of a Binary Cholesteric Liquid Crystals System: Mixtures of Oleyl Cholestryl Carbonate and Cholesteryl Nonanate,” J. Appl. Phys., 67, 1001-1006 (1990).
Washizu, S., I. Terada, T. Kajiyama, and M. Takayagi, “Gas Permeation through Polymer/Liquid Crystal Composite Membrane,” Polym J., 16, 307-316 (1984).
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Lin, SY., Lin, HL. & Li, MJ. Adsorption of Binary Liquid Crystals onto Cellulose Membrane for Thermo-Responsive Drug Delivery. Adsorption 8, 197–202 (2002). https://doi.org/10.1023/A:1021256400092
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DOI: https://doi.org/10.1023/A:1021256400092