User:Alicia Rasines Mazo/Notebook/CHEM-581 Experimental Chemistry I/2014/09/10

From OpenWetWare

Jump to: navigation, search
Project name Main project page
Previous entry      Next entry

Tasks for September 10

  • To complete film synthesis from September 5
  • To begin film preparation of ionic liquid modified clays
  • To analyse DSC data

Completion of Film Synthesis

Continued from Dr. Harting's procedure

  • Placed in sodium sulfate solution, followed by 1% HCl solution and finally in Sodium Bicarbonate

Film preparation of ionic liquid modified clay

  • Procedure followed as detailed by Dr. Harting
    • Added 1.12 g of of Sodium Montmorillonite (NaMT) to a scintillation vial containing 20mL of 50:50 HPLC grade water:ethanol.
    • Added 0.523 g of tributylhexadecylphosphonium bromide (THP Br) to exchange 100% of the Na from the clay.
      • 1.12 g NaMt × (92×10-3/100g NaMT)×(507.65g THP Br/mol) = 0.523 g of THP Br

DSC (Differential Scanning Calorimetry) Data

Note: To calculate mass of water evaporated the following equation was used: q=mHv. So that mass of water=(q×mass of sample)/Hv where Hv=2.23×103 J/g
PVA film in 2 ppm MG solution
Image:PVA2ppmDSC.png

  • Onset of water evaporation: 99.59ºC
  • Heat of hydrate decomposition: 830.4 J/g
  • Mass of water evaporated = 0.00144 g
  • Major peaks in water:
    • Minimum at 134.73ºC, other peaks at 101, 103 ºC
  • Glass transition:
    • Top curve inflection point: 68.58ºC
    • Bottom curve inflection points: 69.39, 85.00ºC

PVA film in 8 ppm MG solution
Image:PVA8ppmDSC.png

  • Onset of water evaporation: 100.91ºC
  • Heat of hydrate decomposition: 1130 J/g
  • Mass of water evaporated = 0.00177 g
  • Major peaks in water:
    • Minimum at 103.58ºC, other peaks at 107, 117 and 120ºC
  • Glass transition:
    • Top curve inflection point: 68.11ºC
    • Bottom curve inflection points: 68.94, 87.66 ºC

PVA film in 80 ppm MG solution
Image:PVA80ppmDSC.png

  • Onset of water evaporation: 99.82ºC
  • Heat of hydrate decomposition: 1458 J/g
  • Mass of water evaporated = 0.00257 g
  • Major peaks in water:
    • Minimum at 110ºC, other peaks at 117 and 130.
  • Glass transition:
    • Top curve inflection point: 68.17ºC
    • Bottom curve inflection point: 68.56ºC

PVA film in 200 ppm MG solution
Image:PVA200ppmDSC.png

  • Onset of water evaporation: 99.77ºC
  • Heat of hydrate decomposition: 938.2 J/g
  • Mass of water evaporated = 0.00147 g
  • Major peaks in water:
    • Minimum at 125.54ºC, other peaks at 101, 105 and 136
  • Glass transition:
    • Top curve inflection point: 68.36ºC
    • Bottom curve inflection point: 69.15 ºC

PVA-Clay film in 2 ppm MG solution
Image:PVAClay2ppmDSC.png

  • Onset of water evaporation: 100.51ºC
  • Heat of hydrate decomposition: 1276 J/g
  • Mass of water evaporated = 0.00232 g
  • Major peaks in water:
    • Minimum at 107ºC, other peaks at 109, 111 and 125ºC
  • Glass transition:
    • Top curve inflection point: 68.16ºC
    • Bottom curve inflection point: 68.70 ºC

PVA-Clay film in 8 ppm MG solution
Image:PVAClay80ppmDSC.png

  • Onset of water evaporation: 98.55ºC
  • Heat of hydrate decomposition: 865.9 J/g
  • Mass of water evaporated = 0.00213 g
  • Major peaks in water:
    • Minimum at 101.19ºC, other peaks at 104, 130ºC
  • Glass transition:
    • Top curve inflection point: 68.59ºC
    • Bottom curve inflection point: 69.02 ºC

PVA-Clay film in 80 ppm MG solution
Image:PVAClay80ppm2DSC.png

  • Onset of water evaporation: 100.76ºC
  • Heat of hydrate decomposition: 1044 J/g
  • Mass of water evaporated = 0.00158 g
  • Major peaks in water:
    • Minimum at 101.94ºC, other peaks at 105, 108ºC
  • Glass transition:
    • Top curve inflection point: 68.27ºC
    • Bottom curve inflection point: 68.50 ºC

PVA-Clay film in 200 ppm MG solution
Image:PVACLay200ppm.png

  • Onset of water evaporation: 99.70ºC
  • Heat of hydrate decomposition: 1138 J/g
  • Mass of water evaporated = 0.00177 g
  • Major peaks in water:
    • Minimum at 108ºC, other peaks at 110, 131ºC
  • Glass transition:
    • Top curve inflection point: 68.54ºC
    • Bottom curve inflection point: 67.97 ºC


Personal tools