INSTABILITY MECHANISMS of ELECTRICALLY CHARGED LIQUID JETS in ELECTROSPINNING vs. ELECTROSPRAYING
In situ formation of ti o2 particle on surface by electrospraying
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In situ deposition of TiO2 particles by electrospraying Using TTIP in alcohol as a precursor A presentation by Rameshwar Kunkana & Sunil Kumar 1
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Transcript of In situ formation of ti o2 particle on surface by electrospraying
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In situ deposition of TiO2 particles by electrospraying
Using TTIP in alcohol as a precursor
A presentation by Rameshwar Kunkana & Sunil Kumar
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ReagentsTTIP – Titanium tetra isopropoxide. Chemical Formula - Ti{OCH(CH3)2}4.Structural Formula :
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Reactions Involved.
TTIP reacts with water to deposit Titanium Dioxide.1) TTIP (in alcohol) + H2O(atm) Ti(OH)4
2) Ti(OH)4 + Ti(OH)4 TiO2
The solution quickly solidify with contact air so its compulsory to work with lower concentration.
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TTIP in alcohol as a precursor
H2OTTIP
Curing (TiO2 Network)
In situ formation of TiO2 particle on surface
Alcohol + TTIP
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Experimental Points• In reaction (during electrospraying) H2O comes from atmospheric
moisture.• When relative humidity is less in atmosphere then hot water bath was
kept inside the setup for some time.• Curing of sample was done to evaporate moisture from surface of
deposited particles.• Curing Parameters…..
Temperature : 110 , Air Temperature : 115 Time : 5 minutes with normal mode.
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1) Distance between Area of deposited needle and collector particles
2) collector voltage Area of deposited particles
3) Moisture Particle size
Observations
7Without Curing with moisture
8With curing without moisture
9With curing with moisture
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