User:Anh Do/Notebook/CHEM 481 Polymer/2016/09/02

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PVOH Film Ingredients 1 g PVOH + 0.5 mL 8% glutaraldehyde in 12 mL water 1 g PVOH + 0.1 g bentonite powder + 0.5 mL glutaraldehyde in 12 mL water 1 g PVOH + variable amount of a crosslinking agent (either equivalent moles of glyoxal or a different quantity of glutaraldehyde) w/o clay Stir at 300 rpm and heat at 70 degree celsius until PVOH and bentonite totally dissolved in the solution Pour the solution to a Teflon disk Films made: 1. PVOH + Glutaraldehyde 1 g PVOH + 0.5 mL 8% glutaraldehyde Mass of PVOH measured: 1.0040 g 2. PVOH + Clay + Glutaraldehyde 1 g PVOH + 0.1 g bentonite powder + 0.5 mL glutaraldehyde Refer to notes from [Friday] 3. PVOH + Clay + Glyoxal 1 g PVOH + 0.1 g bentonite powder + 0.5 mL glutaraldehyde + 0.0553 mL glyoxal Mass of PVOH meassured: 1.0060 g Mass of Bentonite meassured: 0.1001 g Volumn of glyoxal meassured: 0.0553 mL Density of glutaraldehyde = 1.06 g/mL Molar mass of glutaraldehyde = 100.117 g/mol Amount of 8% glutaraldehyde in 0.5 mL = 0.5*(1.06/100.117)*0.08 = 4.235*10^-4 mol Amount of glyoxal needed = 4.235*10^-4 mol Density of glyoxal = 1.27 g/mL Molar mass of glyoxal = 58.04 g/mol Volumn of glyoxal needed = (4.235*10^-4)/(1.27/58.04)/0.35 = 0.0553 mL Prepare stock solutions 1. 100 mL 200 ppm Malachite Green Add 0.02 g of MG to 100 mL of DI water 200ppm = 200 mg/L Mass of MG powder: 100mL*1L/1000mL*200mg/1L = 20mg Mass of MG measured: 0.02003g 2. 100 mL 3 wt% bentonite Add 3g bentonite to 97mL of water Density of water is 1g/mL 100mL* 1g/mL = 100g 3% of 100g is 3g Measured mass of bentonite: 100mL of 3%wt NaMT 3g NaMT added to 97mL water Measured weight of NaMT: 3. 200 mL water + 40 g Na2SO4 + 4 mL H2SO4 (conc.) Put chemicals together and stir 4. 250 mL 1.0 M HCl solution Add 20mL of conc. HCl to 230 mL of deionized water 12.1 M HCl (conc.) M1V1=M2V2 => 12.1 M HCl * V1 = 1.0 M * 250mL => V1 = 20.8 mL 5. 250 mL 0.2 M sodium bicarbonate solution Add 4.2g NaHCO3 to 250mL water Mr of NaHCO3: 84.007 g/mol Amount of NaHCO3: 250mL * 1L/1000mL*0.2 mol/L= 0.05 mol NaHCO3 Mass of NaHCO3: 0.05 NaHCO3 * 84.007 g/mol = 4.2 g NaHCO3 Measured mass of NaHCO3: Pipettes Accuracy Test Glass vial and cap were weighed p-200 pipette was set to 200µL. 200µL of distilled water were pipetted and placed in vial. Vial and water was measured. This step was repeated six times for six different measurements. Data (table made by Dominique) Pipette Accuracy Data Pipette Mass of water + Vial + Previous Water Mass (g) Mass of water (g) p-10 (5 measures) Mass of Vial: 14.86452g Done by Sarah 14.91830 0.05378 14.9664 0.04814 15.01317 0.04673 15.06537 0.05220 15.12257 0.05720 15.16976 0.04719 p-200 Mass of Vial: 14.98395g 15.18007 0.19612 15.38455 0.020448 15.58249 0.19794 15.78102 0.19853 15.97933 0.19831 16.16458 0.18525 p-1000 Mass of Vial: 14.88254g Done by Anh 16.01650 1.13396 16.98485 0.96835 17.95782 0.97297 18.95590 0.99808 19.94660 0.99070 20.94070 0.99410 Conductivity and pH of water A vial of each kind of water was filled with water and the pH and Conductivity meters were used to measure the pH and conductivity of each. Data Observation Fluorescence of Water