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

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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<br.> PVA film in 2 ppm MG solution<br.> <br.> 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<br.> PVA film in 8 ppm MG solution<br.> 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<br.> PVA film in 80 ppm MG solution<br.> 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<br.> PVA film in 200 ppm MG solution<br.> 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<br.> PVA-Clay film in 2 ppm MG solution<br.> 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<br.> PVA-Clay film in 8 ppm MG solution<br.> 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<br.> PVA-Clay film in 80 ppm MG solution<br.> 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<br.> PVA-Clay film in 200 ppm MG solution<br.> <br.> 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