User:Raquel Lara/Notebook/481-2018/2018/10/31

Biomaterials Design Lab

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Objective Use DSC to analyze beads Hydration test Image analysis to determine particle size Description More PVA clay beads made Same protocol used in the past week DSC samples prepared and analyzed Tzero pans weighed 3-5 mg of sample weighed onto the pan each lab member prepared there own sample Hydration Test ~100 mg of PVA-clay & PVA beads added to 50 mL Falcon tube with 50 g DI water After a week, the beads are re-weighed to see how much water they adsorbed Data DSC Parameters Equilibrate at 20 C Isotherm for 1.00 min Ramp 10.000 C/min to 250.00 C Isothermal for 1.00 min Ramp 10.000 C/min to 20.00 C Repeat segment 2 Hydration Test PVA Clay Beads 0.12511 g beads, 52.2327 g water 0.126141 g beads, 50.1840 g water 0.12455 g beads, 50.0621 g water PVA Beads 0.12639 g beads, 50.0187 g water 0.12515 g beads, 50.0760 g water 0.12662 g beads, 50.1071 g water Notes DSC measures the transitions melting crystalline to liquid glass transition amorphous stuck in place to amorphous to wiggling