Title page for etd-0220112-182315


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URN etd-0220112-182315
Author Ruei-Bin Lin
Author's Email Address m983100026@student.nsysu.edu.tw
Statistics This thesis had been viewed 5341 times. Download 820 times.
Department Materials and Optoelectronic Science
Year 2011
Semester 1
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title One-pot Synthesis of Hierarchical Mesoporous Materials Fabricated from ABC Triblock Copolymer as Single Template
Date of Defense 2012-01-31
Page Count 100
Keyword
  • phenolic resin
  • Evaporation Induced Self-assembly (EISA)
  • triblock copolymer
  • mesoporous silica
  • hierarchical
  • Abstract ABC type amphiphilic triblock copolymers, polyethylene-b-poly(ethylene oxide)-b-poly (ε-caprolactone) (PE-b-PEO-b-PCL), were synthesized through ring-opening polymerization. We have successfully synthesized hierarchical mesoporous silicas using a simple evaporation-induced self-assembly (EISA) strategy. Two blocks of hydrophobic segment (PE and PCL) in the triblock copolymer (PE-b-PEO-b-PCL) involved in two-type mesepores after calcinations. We recognized the PE segment attributed to face centered cubic (f. c. c.) morphology (spherical pore) and the PCL segment attributed to tetragonal cylinder structure (cylinder pore) by small angle X-ray scattering (SAXS), transmission electron microscopy (TEM) and specific surface area & pore size distribution analyzer (BET), respectively. We also investigated the effect on pore size and morphology with changing the molecular weight of PCL and the ratios of TEOS/template/HCl.
      We also synthesized the mesoporous phenolic resin by triblock copolymer poly(ethylene oxide)-b-poly(ε-caprolactone)-b-poly(L-lactide) (PEO-b-PCL-b-PLLA). After curing and calcinations, we also explored the morphology and pore size distribution of mesoporous phenolic by SAXS, TEM, BET. Because of the sequence of hydrophobic segment PCL and PLLA lay in the same side, so we could only observe hexagonal cylinder structure and one pore size.
    Advisory Committee
  • Ming Chen - chair
  • Chih-Feng Wang - co-chair
  • Yeo-Wan Chiang - co-chair
  • Shiao-Wei Kuo - advisor
  • Files
  • etd-0220112-182315.pdf
  • indicate access worldwide
    Date of Submission 2012-02-20

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