User:Karlena L. Brown/Notebook/PVOH Research/2013/02/01: Difference between revisions
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* Prepare and replenish new surfactant exchanged clays | * Prepare and replenish new surfactant exchanged clays | ||
==PVOH 130K Prepared Samples== | ==PVOH 130K Prepared Hydrogel Samples== | ||
{| {{table}} | {| {{table}} | ||
| align="center" style="background:#f0f0f0;"|'''PVOH vs. Clay Ratio''' | | align="center" style="background:#f0f0f0;"|'''PVOH vs. Clay Ratio''' | ||
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|} | |} | ||
==Surfactant Clay Exchange | ==Preparations For Clay - Surfactant Exchanged Soils== | ||
'''(Important Information and Notes About Clay)''' | |||
# Clay is made from silicon dioxide | |||
# If ions within the clay are changed, then clay absorbance, color, and exchange functions are affected | |||
'''(Such ions incldue: Al<sup>3+</sup>, Mg<sup>2+</sup>, Si<sup>2+</sup>, Li<sup>+</sup>, and Fe<sup>2+ or 3+</sup>,)''' | |||
----------------------------------------------------------------------------------------------------------------------- | |||
* In a 100mL closed cap beaker, weigh out ~ 2 grams of NaMT clay to do a 110% ion exchange with DMHXLBR | |||
* Next, complete calculations to determine how much DMHXLBR will be needed to complete '''110% exchange''' | |||
'''1.9999 g NaMT x (92 meqv/100 g NaMT) x (1 mol DMHXLBR/1000 meqv) x (110/100)% x (431.45 g DMHXLBR/1 mol DMHXLBR) = 0.8732 g DMHXLBR''' | |||
* Then add a stir bar along with ~ 25mL of both H<sub>2</sub>O and ethanol to the clay and surfactant DMHXLBR mixture | |||
* Afterwards, cap the beaker and begin stirring the solution on a stir plate for ~ 1 week | |||
'''(Repeat the entire process again in order to complete a 110% exchange with laponite clay and surfactant DMHXLBR)''' | |||
* Complete calculations to determine how much Bu<sub>3</sub>HdP<sup>+</sup> will be needed to complete '''50% exchange''' | |||
'''2.9672 g NaMT x (55 meqv/100 g NaMT) x (1 mol DMHXLBR/1000 meqv) x (110/100)% x (431.45 g DMHXLBR/1 mol DMHXLBR) = 0.7745 g DMHXLBR''' | |||
'''(Repeat the entire process again in order to complete a 50% exchange with NaMT clay and surfactant, Bu<sub>3</sub>HdP<sup>+</sup>)''' | |||
* Complete calculations to determine how much Bu<sub>3</sub>HdP<sup>+</sup> will be needed to complete '''50% exchange''' | |||
'''2.0001 g NaMT x (92 meqv/100 g NaMT) x (1 mol Bu<sub>3</sub>HdP<sup>+</sup>/1000 meqv) x (50/100)% x (507.65 g Bu<sub>3</sub>HdP<sup>+</sup>/1 mol Bu<sub>3</sub>HdP<sup>+</sup>) = 0.4671 g Bu<sub>3</sub>HdP<sup>+</sup>''' | |||
{| {{table}} | |||
| align="center" style="background:#f0f0f0;"|'''Surfactant Exchange Ratio''' | |||
| align="center" style="background:#f0f0f0;"|'''Clay Selection''' | |||
| align="center" style="background:#f0f0f0;"|'''Surfactant Selection''' | |||
| align="center" style="background:#f0f0f0;"|'''Actual Clay Mass (g)''' | |||
| align="center" style="background:#f0f0f0;"|'''Actual Surfactant Mass (g)''' | |||
| align="center" style="background:#f0f0f0;"|'''H<sub>2</sub>O Added (mL)''' | |||
| align="center" style="background:#f0f0f0;"|'''Ethanol Added (mL)''' | |||
|- | |||
| 50%||(NaMT)||Bu<sub>3</sub>HdP<sup>+</sup>||2.0001||0.4676||25||25 | |||
|- | |||
| 110%||NaMT||DMHXLBR||1.9999||0.79080||50||50 | |||
|- | |||
| 110%||Laponite||DMHXLBR||2.9672||0.77470||50||50 | |||
|} | |||
==Notes== | ==Notes== | ||
* Two types of clay that were used included: | |||
# Laponite | |||
# Sodium Montmorrillonite (NaMT) | |||
* Two types of surfactants that were used included: | |||
# Tributyl hexadecyl phosphonium bromide (Bu<sub>3</sub>HdP<sup>+</sup>) | |||
# Methyl 16 bromohexadecanoate (DMHXLBR) | |||
* Surfactant exchanged clays were prepared based upon the exchange ratios and calculations. | |||
* For the 110% CEC Laponite w/ DMHXLBR actually 50mL of each of both ethanol and water was used. | |||
* For the 110% CEC NaMT w/ DMHXLBR actually 50mL of each of both ethanol and water was used. | |||
* For the 50:50 110% CEC Laponite in PVOH 130K solution when making hydrogels, an extra 3mL of H<sub>2</sub>O was added; therefore, the dye amount added had to be increased, ~ 54.5μL of 165μM added. | |||
* For the 50:50 110% CEC NaMT in PVOH 130K solution when making hydrogels, an extra 2mL of H<sub>2</sub>O was added; therefore, the dye amount added had to be increased, ~ 48.5μL of 165μM added. | |||
* For the 90:10 110% CEC NaMT in PVOH 130K solution when making hydrogels, an extra 2mL of H<sub>2</sub>O was added; therefore, the dye amount added had to be increased, ~ 87.0μL of 92μM added. | |||
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Revision as of 18:37, 8 April 2013
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OBJECTIVES
PVOH 130K Prepared Hydrogel Samples
Preparations For Clay - Surfactant Exchanged Soils(Important Information and Notes About Clay)
(Such ions incldue: Al3+, Mg2+, Si2+, Li+, and Fe2+ or 3+,)
1.9999 g NaMT x (92 meqv/100 g NaMT) x (1 mol DMHXLBR/1000 meqv) x (110/100)% x (431.45 g DMHXLBR/1 mol DMHXLBR) = 0.8732 g DMHXLBR
(Repeat the entire process again in order to complete a 110% exchange with laponite clay and surfactant DMHXLBR)
2.9672 g NaMT x (55 meqv/100 g NaMT) x (1 mol DMHXLBR/1000 meqv) x (110/100)% x (431.45 g DMHXLBR/1 mol DMHXLBR) = 0.7745 g DMHXLBR (Repeat the entire process again in order to complete a 50% exchange with NaMT clay and surfactant, Bu3HdP+)
2.0001 g NaMT x (92 meqv/100 g NaMT) x (1 mol Bu3HdP+/1000 meqv) x (50/100)% x (507.65 g Bu3HdP+/1 mol Bu3HdP+) = 0.4671 g Bu3HdP+
Notes
# Laponite # Sodium Montmorrillonite (NaMT)
# Tributyl hexadecyl phosphonium bromide (Bu3HdP+) # Methyl 16 bromohexadecanoate (DMHXLBR)
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