Research Institute of Textile Chemistry and Textile Physics. Leopold-Franzens University Innsbruck. STEP-ITN Mid-Year Meeting, Unilever, Vlaardingen, ...
Chemical modification and characterisation of polysaccharide based materials
Hossam E. Emam, A.P Manian, B. Široka and T. Bechtold Research Institute of Textile Chemistry and Textile Physics Leopold-Franzens University Innsbruck
STEP-ITN Mid-Year Meeting, Unilever, Vlaardingen, Netherlands, March 29 – 31, 2010
Content • • • • • •
Plan of work How my work fits in the network Determine the technique Sorption process Conclusion Future Plan
WP 3 & WP 4
STEP-ITN Mid-Year Meeting, Unilever, Vlaardingen, Netherlands, March 29 – 31, 2010
Metal Salt
Reducing agent
PH, Temp
PH, Temp
Nanoparticles
1.
Fiber
2.
Metal salt solution
Metal Incorporated Fiber
Nanoparticles inside Fiber
Reducing and Stabilizing agent
Fiber
PH, Temp
Soaking or Padding
Nanoparticles
Nanoparticles Colloidal solution Fiber Coated Nanoparticles
WP 3 & WP 4
STEP-ITN Mid-Year Meeting, Unilever, Vlaardingen, Netherlands, March 29 – 31, 2010
How my work fits in the network STEP-ITN
My Work
3. Characterization
WP 3 & WP 4
WP 3
2. Nanoparticles
WP 5
1. Polysaccharide based materials
WP 4
STEP-ITN Mid-Year Meeting, Unilever, Vlaardingen, Netherlands, March 29 – 31, 2010
Insertion of metal to insoluble polysaccharide matrix. • Substrate : Lyocell fiber • Metal : Silver Determine the technique – Titration of AgNO3 – Digestion of fiber – Buffer solution
WP 3 & WP 4
STEP-ITN Mid-Year Meeting, Unilever, Vlaardingen, Netherlands, March 29 – 31, 2010
Titration of Silver Nitrate 8
0.005 M NaCl
0.005 M AgNO3
7
0.005 M KI
6 5 4 3 2 1 0 0
2
4
6
8
0.005 M Titrator
Ksp AgI > Ksp AgCl WP 3 & WP 4
STEP-ITN Mid-Year Meeting, Unilever, Vlaardingen, Netherlands, March 29 – 31, 2010
Digestion of Fiber 2
AgNO3 + H2O AgNO3 + 0.1 M HNO3 AgNO3 + I M HNO3 + I M CH3COONa AgNO3 + 1 M HNO3 + I M CH3COOK
1.8 1.6
0.004983 M KI
1.4 1.2 1 0.8 0.6 0.4 0.2 0 0
10
20
30
40
50
60
70
80
90
AgNO3 Solution Volume (ml)
WP 3 & WP 4
STEP-ITN Mid-Year Meeting, Unilever, Vlaardingen, Netherlands, March 29 – 31, 2010
Preparation of AgNO3 solutions at different PH
WP 3 & WP 4
PH 3
PH 4
PH 5
PH 6
Potassium Acetate 0.4 M
2
22
81
119
Acetic Acid 0.4 M
123
103
44
6
Potassium Nitrate 0.4 M
123
103
44
6
AgNO3 (160)
125
125
125
125
Deionized H2O
127
147
206
244
Total Volume (ml)
500
500
500
500
Conc. of Acetic acid (M)
0.0984
0.0824
0.0352
0.0048
Conc. of Potassium acetate (M)
0.0016
0.0176
0.0648
0.0952
Conc. of Acetate buffer (M)
0.1
0.1
0.1
0.1
Conc. of total Potasium (M)
0.1
0.1
0.1
0.1
Conc. Potassium nitrate (M)
0.0984
0.0824
0.0352
0.0048
Real PH
3.08
3.98
4.95
5.95
STEP-ITN Mid-Year Meeting, Unilever, Vlaardingen, Netherlands, March 29 – 31, 2010
Sorption Process 0.0012
0.78
mmol Ag / g Fiber SRV
0.76
0.74 0.0008 0.72 0.0006
SRV
mmol Ag / g Fiber
0.001
0.7 0.0004 0.68 0.0002
0.66
0
0.64 3
4
5
6
PH
WP 3 & WP 4
STEP-ITN Mid-Year Meeting, Unilever, Vlaardingen, Netherlands, March 29 – 31, 2010
Conclusion • Potassium iodide is the better for titration of Silver nitrate • Buffer solution is Acetic acid and Potassium acetate. • Insertion of Silver inside Lyocell fiber independent PH
WP 3 & WP 4
STEP-ITN Mid-Year Meeting, Unilever, Vlaardingen, Netherlands, March 29 – 31, 2010
Future work
– Study the sorption process. – Reduction of Silver.
WP 3 & WP 4
STEP-ITN Mid-Year Meeting, Unilever, Vlaardingen, Netherlands, March 29 – 31, 2010
STEP-ITN Mid-Year Meeting, Unilever, Vlaardingen, Netherlands, March 29 – 31, 2010
Hossam E. Emam Soliman
