1 / 6

한양대 공업화학과 무기소재연구실 하 회 진

INORGANIC / ORGANIC /POLYMERIC NANOCOMPOSITES. 한양대 공업화학과 무기소재연구실 하 회 진. Inorganic Material Lab. NANOCOMPOSITES. TYPES OF NANOCOMPOSITE Types Examples Low temperature sol-gel derived nanocomposites Mullite/SiO 2 ; Al 2 O 3 /SiO 2 ; SiO 2 /MgO ...

moana
Download Presentation

한양대 공업화학과 무기소재연구실 하 회 진

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. INORGANIC / ORGANIC /POLYMERIC NANOCOMPOSITES 한양대 공업화학과 무기소재연구실 하 회 진 Inorganic Material Lab.

  2. NANOCOMPOSITES TYPES OF NANOCOMPOSITE Types Examples Low temperature sol-gel derived nanocomposites Mullite/SiO2; Al2O3/SiO2; SiO2/MgO ... Structural ceramic nanocomposites Al2O3/SiC; Si3N4/SiC ... Glass ceramic: glass/metal nanocomposites Photosensitive glasses Electroceramic nanocomposites Co/Cr Nanocomposites films nanocomposites Lead zirconate titanate (PZT)/nickel Entrapment-type Zeolite/metallic or organic complex Layered nanocomposites Pillared clays Metal/ceramic nanocomposites Fe Cr/Al2O3; Ni/Al2O3 Organoceramic nanocomposites Polymeric matrix/PbTiO3 Inorganic Material Lab.

  3. NANOCOMPOSITES CONTENTS  Nanoparticles by ultrasound - Molybdenum oxide-, molybdenum carbide-silica & zinc sulfide-silica  Pillared layered nanocomposites - Vanadium pentoxide doped aluminium oxide pillared clays (VAPCs) & p-toluenesulfonic acid doped aluminium oxide pillared clays (TSPCs)  Encapsulation nanoparticles by two-step process - Silica-magnetite/maghemite  Nanoclusters in block copolymer films (nanoreactor) - NORCOOH method, NORCOONa method, ring-opening metathesis polymerization (ROMP)  Molecular imprinting - Surface molecular imprinted polymer Inorganic Material Lab.

  4. Ultrasonic Method - Nanoparticle 1 N. A. Dhas and A. Gedanken, Chem. Mater., 1997, 9, 3144 N. A. Dhas, A. Zaban, and A. Gedanken, Chem. Mater., 1999, 11, 806 Sonochemical synthesis System MOS composite 2Mo(CO)6 + 17/2 O2 → Mo2O5(s) + 2CO2(g) Mo2O5 + SiO2 → Mo2O5-SiO2 --------------------------------- 2Mo(CO)6 + SiO2 + 17/2 O2 → Mo2O5-SiO2(s) + 12CO2(g) MCS composite 2Mo(CO)6 → 2Mo(s) + 12CO(g) 2CO → C(s) + CO2(g) 2Mo + C → Mo2C(s) Mo2C + SiO2 → Mo2C-SiO2(s) ------------------------------- 2Mo(CO)6 + SiO2 → Mo2C-SiO2(s) + CO2(g) + 10CO(g) MOS(Molybdenum Oxide-Silica) Sonication for 3h, Mo(CO)6, silica in decane under ambient air MCS(Molybdenum Carbide-Silica) Sonication for 3h, Mo(CO)6, silica in decane under argon - Decomposition of the precursor into the required coating phase - Breaking of the strained siloxane link of the silica - Colliding with each other and depositing Inorganic Material Lab.

  5. Ultrasonic Method - Nanoparticle 2 System ZnS Formation H2O ))))) H + OH 2H + RS → H2S + R (RS = thioacetamide) H2S + Zn(Ac)2 → ZnS + 2AcH ZSS (ZnS-SiO2) Sonication for 3h, Zn(ac)6, SiO2, TA(thioacetamide, MeCSNH2) in water under ambient air Sonochemistry Formation, growth, & Implosive collapse of bubbles in liq. → hot spots (~5000K, 1800 atm, cooling rates 108 K/s) Inorganic Material Lab.

  6. Nanocomposites based on pillared clays J. Wang, J. Merino, P. Aranda, J.-C. Galvan and E. R.-Hitzky, J. Mater. Chem., 1999, 9, 161 Pillared clays ADVANTAGES VAPCs easily prepared, not expensive, easily separated and recovered after rexn., good thermal stability TSPCs excellent catalytic activity and good selectivity V2O5 or p-toluenesulfonic acid with oxidant or strong acid character Porous materials REACTIVITIES Oxidation (alcohol→carbonyl) : benzyl alcohol to benzaldehyde Synthesis of methyl tert-butyl ether (MTBE) and bisphenol A Inorganic Material Lab.

More Related