Synthesis of NC and DN hydrogels: Tests on water retention ability: 1. In LB:
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2 Synthesis of NC and DN hydrogels: Tests on water retention ability: 1. In LB: Note: The time of weighing: M0: , 16:30; M1: , 18.46; M2: , 15: In 0.9% NaCl aq: Note: a) The time of weighing: M0: , 16:30; M1: , 18.46; M2: , 15:21. b) The result might have been influenced by the following reasons: i. The sample of NC2-40 was broken into 2 pieces; ii. DN 20% was partly saturated with water before the test : Synthesis of DN (SA/AAm) 30% hydrogel: PICS! : Synthesis of NC (AAm/Laponite) and DN (SA/AAm) hydrogel:
3 : Tests on water retention ability: Note: a) The time of weighing: M0: , 13:35; M1: , 10:30; M2: , 13:14. b) NC3-40 (strip) was chosen for the following test: i. Put the gel in an oven to lose water, and at 13:32, Aug 25, take out and weigh the gel, getting M3. M3=3.46g. ii. Put the dried gel into water and weigh at 11:34, Aug 26, getting M4. M4=18.78g Synthesis of DN (agar/paam) hydrogel: 1. Strong: a) 50 ml deionized water: exclude bubbles (purging with nitrogen for 15 min and ); b) Add AAm g, and stir for 20 min; c) Add agar 0.85g, and stir for 10 min; d) Add BIS 0.015g, and stir for 10 min; e) Add Irgacure g, and stir for 5min; f) Vacuumize for 10 min, purge with nitrogen, and dissolve in 95 ; g) Coagulate in 4 for 30 min; h) UV (365nm) for 1h. 2. Tough: a) 50 ml deionized water: exclude bubbles (purging with nitrogen for 15 min and ); b) Add AAm 17.77g, and stir for 20 min; c) Add agar 0.65g, and stir for 10 min; d) Add BIS 0.02g, and stir for 10 min; e) Add Irgacure g, and stir for 5min; f) Vacuumize for 10 min, purge with nitrogen, and dissolve under 95 ; g) Coagulate under 4 for 30 min; h) UV (365nm) for 1h. Results: Too many bubbles; agar formed lumps at bottom (maybe the temperature was too high) Repeating the former experiments. Results: forming transparent, yellowish hydrogels. Some exhibited dark yellow color, possibly due to too long time under UV.
4 Gradient studies on concentration of agar: Result: The concentration of agar in group A10 gives the hydrogel the best strength Gradient studies on concentration combination of agar/aam: 2. Gradient studies on concentration of AAm: : Gradient studies of DN (PAMPS-1-4/PAAm-X2-Y2):
5 PICTURES Gradient studies on concentration of Irgacure 2959: Result: The concentration of Irgacure in group 6 gives the hydrogel the best strength Gradient studies on concentration combination of agar/aam: Result: The concentration combination of agar/aam in group 9 is the toughest Gradient studies on concentration combination of agar/aam:
6 Gradient studies on concentration of AAm: Note: The color of crystal violet faded after being exposed to UV. 2. Tests on mechanical strength: : 1. Gradient studies on concentration combination of agar/aam: 2. Synthesis of TN (agar/paam/sa) hydrogel: Result: TN gel showed great improvement in mechanical strength : 1. Synthesis of TN (agar/paam/sa) hydrogel: 2. Synthesis of DN (agar/paam) hydrogel:
7 : 1. Gradient studies on concentration combination of agar/aam: 2. Gradient studies on concentration of AAm: : 1. Supplementary synthesis for gradient studies on concentration combination of agar/aam: 2. Gradient study of TN (agar/paam/sa) hydrogel: Picture : 1. Gradient studies on SN (AAm) hydrogel: 2. Gradient studies on concentration combination of agar/aam:
8 : Synthesis of insole 2: Pic of insole? : 1. Synthesis of insole 2: 2. Gradient studies on concentration combination of agar/aam:
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