1. a Department of Chemical Engineering , National Cheng Kung University , Tainan , 701‐01 , Taiwan, R.O.C
2. b Department of Chemistry , National Central University , Chung‐Li , Taiwan, R.O.C
3. c Regional Instrument Center , National Science Council , Tainan , Taiwan, R.O.C
4. d Department of Applied Fiber Style , Kun Shan University of Technology , Yung‐Kang City , Taiwan, R.O.C.