Measurement of Diffusion Coefficients of Water,Methanol and Ethanol Solvents at Infinite Dilution in the PVA Membrane Material

Abstract

Abstract:

Gas chromatography is a new,fast,accurate and convenient technique for studying the relationship between small molecule solvents and polymer membrane materials. Many parameters of dissolution and diffusing characters of a small molecule in a polymer can be measured by this method. The retention time and the peak widths at half-height of water,methanol and ethanol in the stationary phase of PVA were obtained in this work. The diffusion coefficients of the small molecule solvents at infinite dilution were calculated with van Deemter equation. The graphs plotted according to the results of the diffusion coefficients of the three small molecule solvents at infinite dilution vs. temperatures were in agreement with the Arrhenius equation. The variance in the diffusion coefficients at infinite dilution of three small molecule solvents was analyzed according to the differences in molecular size.

Key words: Gas chromatography; Water; Methanol; Ethanol; PVA; Diffusion coefficient

CLC Number:

O643

TrendMD:

JIANG Zhen, LI Ji-Ding, ZENG Chu-Yi, CHEN Jian, CHEN Tian-Quan, CHEN Cui-Xian. Measurement of Diffusion Coefficients of Water,Methanol and Ethanol Solvents at Infinite Dilution in the PVA Membrane Material[J]. Chem. J. Chinese Universities, 2006, 27(3): 502.

[1]	TAN Jing, LI Xin-Yong, MOSES Tade, LIU Shao-Min. Preparation and Characterization of Fe-Ni/TiO₂ Nanotube Array Electrodes and Their Photoeletrocatalytic Activity for Dechlorination of Pentachlorophenol [J]. Chem. J. Chinese Universities, 2012, 33(12): 2703.
[2]	HARI Bala, GUO Jin-Yu, Aruna, YUAN Guang-Yu, ZHANG Zhan-Ying, LIU Zong-Rui. Preparation and Visible Light Photocatalytic Properties of Nitrogen and Carbon Co-doped TiO₂ Nanocrystalline [J]. Chem. J. Chinese Universities, 2012, 33(12): 2716.
[3]	HE Li-Fang, LIU Jian-Dong, HUANG Wei, LI Zhe. Effect of Preparation Methods on Performance of Mn-Ce/ZSM-5 Catalyst for Low-temperature Selective Catalytic Reduction of NO [J]. Chem. J. Chinese Universities, 2012, 33(11): 2532.
[4]	XU Lei-Lei, LI Can, SHI Wei-Dong, GUAN Jian-Guo. Structure and Visible Light Photocatalytic Hydrogen Evolution Activities of Cu, W Codoped NaTaO₃ [J]. Chem. J. Chinese Universities, 2012, 33(11): 2537.
[5]	DENG Shuai-Shuai, XIAO Xue-Zhang, CHEN Li-Xin, HAN Le-Yuan, LI Shou-Quan, GE Hong-Wei, WANG Qi-Dong. Effects of Stoichiometry and Dehydrogenation Back-pressure on the Dehydrogenation Behavior of LiBH₄+xMg₂NiH₄ Composites [J]. Chem. J. Chinese Universities, 2012, 33(09): 2030.
[6]	YAN Shao-Wei, FAN Hui, LIANG Chuan, LI Zhong. Influence of Mo Content on Microstructure and Catalytic Performance of Ni-Mo-B Amorphous Alloy Catalyst for Dinitrotoluene Hydrogenation [J]. Chem. J. Chinese Universities, 2012, 33(09): 2067.
[7]	MU Jin, CHEN Li-Li, KANG Shi-Zhao, LI Xiang-Qing. Fabrication of the Eosin Y-MWNTs-NiO Photocatalytic System and Its Photocatalytic Activity for H₂ Evolution from Water [J]. Chem. J. Chinese Universities, 2012, 33(09): 2080.
[8]	ZHANG Xue-Yang, CHENG Lin, YANG Feng, WANG Rui, Korchak Vladimir. NO_x Adsorption and Decomposition over H₃PW₁₂O₄₀/CNTs and the Effect of Microwave Irradiation [J]. Chem. J. Chinese Universities, 2012, 33(08): 1826.
[9]	LI Yue-Jun, CAO Tie-Ping, SHAO Chang-Lu, WANG Chang-Hua. Preparation and Energy Stored Photocatalytic Properties of WO₃/TiO₂ Composite Fibers [J]. Chem. J. Chinese Universities, 2012, 33(07): 1552.
[10]	YANG Mu, WANG Xiao-Na, XU Jin-Wu, WANG Ge. Preparation and Catalytic Properties of Fe-Ti-MCM-41 [J]. Chem. J. Chinese Universities, 2012, 33(07): 1559.
[11]	XU Shi-Hong, ZHAO Song-Jian, TAN Dong-Dong, SHI Peng-Hui, BI De-Fu. Preparation and Photocatalytic Properties of Magnetically Separable Photocatalyst Nanospheres with Egg-like Structure [J]. Chem. J. Chinese Universities, 2012, 33(07): 1511.
[12]	LIU Yao, ZENG Ya-Chao, LIU Ran, WANG Gui-Ling, CAO Dian-Xue. Poisoning of Acetone to Electrooxidation of 2-Propanol at Pd Electrode [J]. Chem. J. Chinese Universities, 2012, 33(05): 1017.
[13]	PAN Chao, DONG Li, QIU Jie-Shan. Fabrication and Photocatalytic Property of Three-dimensional ZnO Hierarchical Structure [J]. Chem. J. Chinese Universities, 2012, 33(05): 1031.
[14]	ZOU Xue-Jun, LI Xin-Yong, ZHAO Qi-Dong, CHEN Guo-Hua. Preparation and Characterization of LaVO₄/TiO₂ Nanotubes and Their Application in Photocatalytic Degradation of Gaseous Toluene under Visible Light [J]. Chem. J. Chinese Universities, 2012, 33(05): 1046.
[15]	PEI Yi-Xia, LI Hui-Quan, LIU Hai-Tao, ZHANG Yi. FTIR Spectroscopic Studies on Catalytic Mechanism of Lead Compounds in the Reaction of Methylene Dianiline and Dimethyl Carbonate [J]. Chem. J. Chinese Universities, 2012, 33(03): 598.

Measurement of Diffusion Coefficients of Water,Methanol and Ethanol Solvents at Infinite Dilution in the PVA Membrane Material

PDF (PC)

Knowledge

Cited

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments