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)