polyacrylic acid(paa), polyethylene glycol(peg) and ...€¦ · glycol(peg) and polyvinyl alcohol...
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Polyacrylic acid(PAA), Polyethylene glycol(PEG) and Polyvinyl alcohol (PVA)
Presenter: Rochelle Lawrence
Supervisor: Zhe Zhao, Keith Duncan
Materials Science Research Group Department of Physics, UWI (Mona)
Materials Science Research Group Department of Physics, UWI (Mona)
From the Faujausite group Na2O.Al2O3.
(2.8±0.2)SiO2.(6~7)H2O (SiO2 : Al2O3 ≈2.6-
3.0)
Materials Science Research Group Department of Physics, UWI (Mona)
OXYGEN
SILICON
ALUMINIUM
Removal of CO2 and moisture from air (air pre-purification) and other gases.
Separation of enriched oxygen from air.
Desiccant for medical and air compressor systems
Catalyze carrier
Materials Science Research Group Department of Physics, UWI (Mona)
• Investigate if polymers may be used instead of kaolin as binders in Zeolite 13X granulation
• Evaluate effect on pH on the zeolite-polymer slurries/granules
Materials Science Research Group Department of Physics, UWI (Mona)
•Solubility
•Non-toxicity
•Cost effectiveness
•Melting point PEG
PVA PAA
Materials Science Research Group Department of Physics, UWI (Mona)
1g of zeolite 13x added to 0.02g of polymer in 100ml
1 ml of solution diluted with 50 ml of water
Nitric acid and ammonia used as acid and base
Zeolite 13 X Average pH 9.75
Zeta potential – 40.625mV
Materials Science Research Group Department of Physics, UWI (Mona)
Graph 2 showing Zeta Potential versus pH (PEG)
-70
-60
-50
-40
-30
-20
-10
0
10
0 2 4 6 8 10 12
pH
Zet
a P
ote
nti
al
Graph 3 showing Zeta Potential versus pH (PVA)
-60
-50
-40
-30
-20
-10
0
10
0 2 4 6 8 10 12
pH
Zet
a p
ote
nti
al
Graph 1 showing zeta potential versus pH (PAA)
-80
-70
-60
-50
-40
-30
-20
-10
0
10
20
0 2 4 6 8 10 12
pH
Zet
a P
ote
nti
al
The isoelectric point is pH 5.54 The isoelectric point is at pH 5.02
The isoelectric point is 5.42
Materials Science Research Group Department of Physics, UWI (Mona)
Average value for Zeta Potential = - 48.2
mv Average value for Size =
998.9nm
milled for 6 hours
0.4g polyacrylic
acid + 20g of Zeolite 13X at
pH10.46
Materials Science Research Group Department of Physics, UWI (Mona)
Calcuated value in air =1.38 x10 -19 J
Calculated value in vacuum = 3.25 x 10-20J
Materials Science Research Group Department of Physics, UWI (Mona)
Polymer Sample
mass of polymer (g)
microL of NH3/HNO3 pH
mass of Zeolite (g)
PAA 1 0.3009 2.71 15.0042
2 0.3005 2400 10.05 15.0060
3 0.3030 100 1.54 15.0050
PVA 1 0.3002 6.25 15.0033
2 0.3074 100 10.30 15.0083
3 0.3014 23 3.89 15.0020
PEG 1 0.3005 5.81 15.0055
2 0.3013 20 2.28 15.0042
3 0.3001 100 9.86 15.0109
Materials Science Research Group Department of Physics, UWI (Mona)
Measuring absorption.......
Materials Science Research Group Department of Physics, UWI (Mona)
Materials Science Research Group Department of Physics, UWI
(Mona)
PAA • HYAMINE
PVA • BORIC ACID
PEG • BARIUM CHLORIDE + IODINE
INDICATORS
Graph 1 showing standard curve for PAA at 420nm
y = 0,0635x
R2 = 0,9855
0
0,05
0,1
0,15
0,2
0,25
0,3
0,35
0,4
0,45
0,5
0 1 2 3 4 5 6 7 8
PAA (ug/mL)
ab
so
rban
ce
Materials Science Research Group Department of Physics, UWI
(Mona)
Graph 2 showing standard curve of PEG at 661nm
y = 0,0031x
R2 = 0,9499
0
0,05
0,1
0,15
0,2
0,25
0,3
0,35
0 20 40 60 80 100 120
PEG (ug/mL)
ab
so
rban
ce
Graph 3 showing standard curve for PVA at 640nm
y = 0,0005x
R2 = 0,9669
0
0,05
0,1
0,15
0,2
0,25
0,3
0,35
0,4
0,45
0,5
0 100 200 300 400 500 600 700 800 900
PVA(ug/mL)
ab
so
rban
ce
Intrusion technique…..
Materials Science Research Group Department of Physics, UWI (Mona)
Materials Science Research Group Department of Physics, UWI (Mona)
0
10
20
30
40
50
60
PVA 1 PVA 1sin PVA 2bsin PVA 2bsin PVA 3a PVA 3asin
44 44 47 49 48 45
PEG 1 PEG 1sin PEG 2bsin PEG 2bsin PEG 3a PEG 3asin
45 38 46 44 49 45
PAA 1 PAA 1sin PAA 2bsin PAA 2bsin PAA 3a PAA 3asin
%
porosity
• Zeta potential solutions more stable in basic conditions.
• Hamaker constant polymer may efficiently bind to the zeolite due to Van der Waals interactions.
• The UV-Vis measurements -PAA showed the least absorption while PVA had the most absorption.
• There is a %porosity ranged from 38-56% for the polymers PVA, PEG and PAA
Materials Science Research Group Department of Physics, UWI (Mona)
• Mechanical properties to be tested: tensile modulus,
compressive strength, fracture analysis
• Binary System of Polymers • Characterisation techniques: X-ray diffraction, Scanning
Electron Microscope, CO2 adsorption
• Modeling with Computer Simulations-DVLO theory to evaluate Van Der Waals forces
Materials Science Research Group Department of Physics, UWI (Mona)
Thank You
Materials Science Research Group Department of Physics, UWI (Mona)