Professor


 

Li-Jen Chen Professor

陳立仁 教授

phone:(02)2362-3296 or (02)3366-3049
fax:(02)23623040

email: ljchen

office:210A

 

Lab Info

Interfacial Phenomena Laboratory

202A; 121B

(02)3366-3041; (02)3366-3041

Education Background

B.S. Ch.E. National Taiwan University 1980
M.S. Ch.E. National Taiwan University 1984
Ph.D. Ch.E. Rice University 1989


Research Topic

Wetting Transition in Surfactant Systems

We are interested in the interfacial behaviors in the region of three coexisting liquid phases of the system water + oil + surfactant. We have found a particular surfactant system for which the middle phase exhibits a sequence of wetting transition: nonwetting partial wetting complete wetting, at the interface between the upper and lower phases by simply varying temperature. We are currently trying to understand the molecular mechanism responsible for this remarkable phenomenon by using density functional theory. Application of this research can be widely found in detergency, cosmetics, enhanced oil recovery, food industry, pharmaceutics, fabrics, etc.  


 

Molecular Simulations

Molecular dynamics, a technique of molecular simulations, involves solving Newton's equations of motion for hundreds up to million molecules to gain the trajectories of molecules moving in an imaginary box. These trajectories provide information about the thermodynamic and structural properties microscopically that cannot be obtained experimentally for realistic fluids. We apply this technique to understand the hydrogen bonding effects on the phase behaviors and to calculate the diffusivity of small molecules in silicalite.



Recent Research Topic

1.Interaction between surfactant and polyelectrolyte and its effect on thermodynamic behavior of micellization,界面活性劑與聚電解質之相互作用與其對形成微胞熱力學行為之效應 Li-Jen Chen, sponsored by the National Science Council Contract #NSC 98-2221-E-002 -086, NT$1,015,000, 8/1/2009-7/31/2010.
 
2.台灣西南海域新興能源–天然氣水合物資源調查與評估:熱力學研究(2/4)理論部分 Li-Jen Chen, sponsored by the 經濟部地質調查所 Contract #97-5226903000-02-04, NT$1,300,000, 1/1/2009-12/31/2009


Honor

 
The Representative Publication Recent 5-years Publication

1. Cheng-Hao Su and Li-Jen Chen, 2011, “Liquid-Liquid Equilibria for the Ternary System Water + Hexadecane + Propylene Glycol n-Propyl Ether,” J. Chem. Eng. Data 56, 589–594.

2. Arwut Promraksa and Li-Jen Chen, 2012, “Modeling contact angle hysteresis of a liquid droplet sitting on a cosine wave-like pattern surface,” J. Colloids Interfacial Sci. 384, 172-181. (SCI, EI)

3. Cheng-Hao Su and Li-Jen Chen, 2012, “Liquid-Liquid Equilibria for the Ternary System Water + Dodecane + 1-(1-Methyl-2-propoxyethoxy)-2-propoanol,” J. Chem. Eng. Data 57(7), 1899-1902. (SCI, EI)

4. Min-Kang Hsieh, Wan-Yi Ting, Yan-Ping Chen, Po-Chun Chen, Shiang-Tai Lin and Li-Jen Chen, 2012, “Explicit Pressure Dependence of the Langmuir Adsorption Constant in the van der Waals-Platteeuw Model for the Equilibrium Conditions of Clathrate Hydrates,” Fluid Phase Equilibria 325, 8089. (合著) (SCI, EI)

5. Min-Kang Hsieh, Yen-Ting Yeh, Yan-Ping Chen, Po-Chun Chen, Shiang-Tai Lin and Li-Jen Chen, 2012, “A Predictive Method for the Change in Equilibrium Conditions of Gas Hydrates with Addition of Inhibitors and Electrolytes,”  Industrial & Engineering Chemistry Research 51, 2456-2469. (合著) (SCI, EI)

6. Yu-Hao Yeh, Kuan-Hung Cho and Li-Jen Chen, 2012, “Effect of softness of polydimethylsiloxane on the hydrophobicity of pillar-like patterned surfaces,” Soft Matter 8, 1079-1086. (SCI, EI)

7. Cheng-Hao Su, Shih-Yao Lin and Li-Jen Chen, 2012, “(Liquid + liquid) equilibria for the ternary system (water + dodecane + propylene glycol n-propyl ether),” Journal of Chemical Thermodynamics 47, 358-361.

8. Chih-Tien Cheng, Li-Jen Chen, Shiang-Tai Lin, Muoi Tang, Po-Chun Chen, Yan-Ping Chen, 2012, “Measurements for the Dissociation Conditions of Methane Hydrate in the Presence of 2,5-Dihydrofuran and 3,4-Dihydro-2H-pyran,” Fluid Phase Equilibria, in press. (合著) (SCI, EI)

9. Yen-Tien Tung, Li-Jen Chen, Yan-Ping Chen and Shiang-Tai Lin, 2012, Molecular Dynamics Study on the Growth of Structure I Methane Hydrate in Aqueous Solution of Sodium Chloride, J. Phys. Chem. B, accepted. (合著) (SCI, EI)

10. Huai-Ying Chin, Bong-Seop Lee, Yan-Ping Chen, Po-Chun Chen, Shiang-Tai Lin and Li-Jen Chen, 2013, “Prediction of Phase Equilibrium of Methane Hydrates in the Presence of Ionic Liquids,” Industrial & Engineering Chemistry Research 52(47), 16985-16992. (SCI, EI)

11. Huai-Ying Chin, Min-Kang Hsieh, Yan-Ping Chen, Po-Chun Chen, Shiang-Tai Lin and Li-Jen Chen, 2013,  “Prediction of Phase Equilibrium for Gas Hydrate in the Presence of Organic Inhibitors and Electrolytes by Using an Explicit Pressure-Dependent Langmuir Adsorption Constant in the van der Waals-Platteeuw Model,” Journal of Chemical Thermodynamics 66, 34-43. (SCI, EI)

12. Cheng-Hao Su and Li-Jen Chen, 2013, “Liquid-liquid equilibria for the ternary system (water + tetradecane + 1-methyl-2-propoxyethoxy-2-propanol)”, Fluid Phase Equilibria 354, 75–79. (SCI, EI)

13. Bang-Yan Liu and Li-Jen Chen, “The Role of Surface Hydrophobicity in Pretilt Angle Control of Polymer-Stabilized Liquid Crystal Alignment Systems,” J. Phys. Chem. C 117(26), 13474-13478. (SCI, EI)

14. Hsuan-Lei Sung, Yueh-Lin Fan, Kimberly Yeh, Yen-Fu Chen and Li-Jen Chen, 2013, “A new hydrate form of diflunisal precipitated from a microemulsion system,” Colloids and Surfaces B 109, 86-73. (SCI, EI)

15. Cheng-Hao Su and Li-Jen Chen, 2013, “Liquid-Liquid Equilibria for the ternary system (water + hexadecane + dipropylene glycol n-propyl ether),” Fluid Phase Equilibria 346, 20-24. (SCI, EI)

16. I. V. Postnova, Li-Jen Chen, and Yu. A. Shchipunov, 2013, “Synthesis of Monolithic Mesoporous Silica with a Regular Structure (SBA-15) and Macropores in Neutral Aqueous Solution at Room Temperature,” Colloid Journal 75(2), 231-233. (SCI, EI)

17. T. P. Adamova, O. S. Subbotin, Li-Jen Chen, and V. R. Belosludov, 2013, “Theoretical Investigations of Possibility of Using Multicomponent (N2-O2-CH4-H2O) Clathrate Hydrates for Recovery of Methane from Mine Gas,” Journal of Engineering Thermophysics 22(1), 62-68. (SCI, EI)

18. Chih-Tien Cheng, Li-Jen Chen, Shiang-Tai Lin, Muoi Tang, Po-Chun Chen and Yan-Ping Chen, 2013, “Measurements for the dissociation conditions of methane hydrate in the presence of 2,5-dihydrofuran and 3,4-dihydro-2H-pyran,” Fluid Phase Equilibria 338, 114-118. (SCI, EI)

19. Arwut Promraksa, Yu-Chen Chuang and Li-Jen Chen, 2014, “Study on the Wetting Transition of a Liquid Droplet Sitting on a Square-Array Cosine Wave-like Patterned  Surface,” J. Colloids Interfacial Sci. 418, 8-19. (SCI, EI)

20. Shih-Yao Lin, Cheng-Hao Su and Li-Jen Chen, 2013, “Liquid-Liquid Equilibria for the Binary Systems of Propylene Glycol Ether +Water Measured by the Phase Volume Method,” Journal of the Taiwan Institute of Chemical Engineers, accepted.