研究主題

含界面活性劑系統的濕潤變

我們的實驗工作主要在探討水＋油＋界面活性劑三成份系統的界面行為。在適當的溫度及組成下，該系統會形成三液相平衡共存。目前我們在研討不同溫度條件下，微量中間相液體分佈在其他兩液相間界面上的形狀，可能有一系列的濕潤變現象:非濕潤行為→部分濕潤行為→完全濕潤行為。我們試圖運用密度函數理論進一步了解其成因。濕潤及非濕潤行為廣泛應用於各種工業上，如：清潔劑、化妝品、染整業、農藥、製藥業、食品工業等。

 

分子模擬

分子動力學是以牛頓運動方程式來解析數百個乃至於百萬個分子的運動軌跡，這些分子運動軌跡可提供在真實流體實驗中無法得到之熱力學及細部結構的微觀性質。我們運用分子動力學方法來瞭解氫鍵對相行為的影響；計算小分子在沸石孔洞中的擴散係數。

最新研究

1. Wetting behavior on patterned surfaces 具微結構表面之溼潤行為 Li-Jen Chen, sponsored by the National Science Council Contract #NSC 97-2221-E-002-083, NT$1,092,000, 8/1/2008-7/31/2009.

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(1/4)理論部分 Li-Jen Chen, sponsored by the 經濟部地質調查所 Contract #97-5226903000-02-04, NT$1,178,894, 3/1/2008-12/31/2008

榮譽獎項

 

代表著作 所有著作

1. Ming-Chih Yeh, Ping-Chang Lin, and Li-Jen Chen, 2004, “Effect of Molecular Structure on Wetting Behavior at the Air-Liquid Interface of Water + Alcohol Mixtures,” J. Phys. Chem. B 108, 9955-9961. (SCI, EI)

 

2. Ming-Chih Yeh, Chia-Ming Chen, and Li-Jen Chen, 2004, “Effect of Hydrophobicity of Amphiphile on Wetting Behaviors of Ternary Water + Oil + Amphiphile Mixtures: A Density Functional Theory Approach,” J. Phys. Chem. B 108, 7271-7279. (SCI, EI)

 

3. Da-Ren Chiou and Li-Jen Chen, 2004, “Liquid-liquid equilibria for the ternary system water + diethylene glycol monohexyl ether + 2-methyl-2-butanol,” Fluid Phase Equilibria, 218, 229-234. (SCI, EI)

 

4. Bo-Jiun Lin and Li-Jen Chen, 2004, “Liquid-liquid equilibria for the ternary system water + tetradecane + 2-butyloxyethanol,” Fluid Phase Equilibria 216, 13-20. (SCI, EI)

 

5. Li-Jen Chen, Yih-Heh Sheu, and Pei-Juian Li, 2004, “Heat Capacity Changes Accompanying Micelle Formation upon Burial of Hydrophobic Tail of Non-ionic Surfactants,” J. Phys. Chem. B, 108, 19096-19098. (SCI, EI)

 

6. Chih-Kang Wu and Li-Jen Chen, 2005, “Observation of a sequence of wetting transitions in the binary water + ethylene glycol monobutyl ether mixture,” J. Chem. Phys. 123(8), 084506. (SCI, EI)

 

7. Chih-Kang Wu and Li-Jen Chen, 2005, “Wetting Behavior of Water + CiEj Mixtures: an Experimental Study,” Langmuir 21, 6883-6890. (SCI, EI)

 

8. Su, I.-F., L.-J. Chen and S.-Y. Suen, 2005, “Adsorption Separation of Terpene Lactones from Ginkgo Biloba L. Extract Using Glass Fiber Membranes Modified with Octadecyltrichlorosilane,” Journal of Separation Science 28, 1211-1220. (SCI)

 

9. Chih-Kang Wu and Li-Jen Chen, 2006, “The pressure- and temperature induced wetting transitions in the binary water + ethylene glycol monoisobutyl ether mixture,“ J. Phys. Chem. B, 110, 11907-11911. (SCI, EI)

 

10. Bo-Jiun Lin and Li-Jen Chen, 2006, “Phase transitions in two-dimensional colloidal particle system observed in Langmuir trough,” Colloids and Surfaces A, Vol 284-285C, pp 239-245. (SCI, EI)

 

11. Da-Ren Chiou, Kuan-Yu Yeh, and Li-Jen Chen, 2006, “Adjustable pretilt angle of nematic 4-n-pentyl-4'-cyanobiphenyl on self-assembled monolayers formed from organosilanes on square-wave grating silica surfaces,“ Applied Physics Letters 88, 133123. (SCI, EI)

 

12. Chia-Ming Chen, Ming-Chih Yeh, and Li-Jen Chen, 2006, "Bulk and Interfacial Wetting Behavior of Binary Mixtures Induced by Associating Between Unlike Pair Molecules," J. Phys. Chem. B 110, 3294-3301. (SCI, EI)

 

13. Da-Ren Chiou, Li-Jen Chen, and Chein-Dhau Lee, 2006, “Liquid crystal alignment and pretilt angle of liquid crystals on micro-grooved polyimide surfaces fabricated by soft embossing method,” Langmuir, 22, 9403-9408. (SCI, EI)Bo-Jiun Lin and Li-Jen Chen, 2007, “Phase transitions in two-dimensional colloidal particles at oil/water interfaces,” Journal of Chemical Physics 126, 034706. (SCI, EI)

 

14. Chih-Hao Hsu, Ming-Chih Yeh, Kung-Lung Lo and Li-Jen Chen, 2007, “Application of Microcontact Printing to Electroless Plating for the Fabrication of Microscale Silver Patterns on Glass,” Langmuir 23, 12111-12118. (SCI, EI)

 

15. Kuan-Yu Yeh, Li-Jen Chen and Jeng-Yang Chang, 2008, “Contact angle hysteresis on regular pillar-like hydrophobic surfaces,” Langmuir 24, 245-251. (SCI, EI)

 

16. Hung-Wei Tsui, Ya-Huei Hsu, Jing-Han Wang, and Li-Jen Chen, 2008, “Novel behavior of heat of micellization of Pluronics F68 and F88 in aqueous solutions,” Langmuir 24, 13858-13862. (SCI, EI)

 

17. Ming-Chih Yeh, Chia-Ming Chen and Li-Jen Chen, 2008, “Effect of molecular structure on wetting behavior of water + amphiphile mixtures:  A density functional approach,” Journal of Chemical Physics 128(4), 044719. (SCI, EI)

 

18. Wei-Fan Kuan and Li-Jen Chen, 2009, “Preparation of superhydrophobic surfaces of a hierarchical silicon nanowire structure,” Nanotechnology, 20, 035605. (SCI, EI)