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Functional TiO2 Coatings on Nylon

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Nadia Funayama

on 30 October 2014

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Transcript of Functional TiO2 Coatings on Nylon

Functional TiO2 Coatings on Nylon
Nadia Funayama


Dr. Owen Standard
MATS 4008

31 Oct 14
Introduction
Statement
of Aims
Fabrication of Films
Results
Conclusions
Outline
Surface Morphology
Mineralogy
Adhesion
Photocatalytic Ability
Fabrication of Titania Thin-films
Preparation of Sol
75 mL H2O
0.85 mL HNO3
TTIP
3 mL Propanol
Dip Coating
2 x 2 cm nylon-6
Cleaned and dried
23 mm/min
Heat Treatment
Reflux
8 h
80°C
Controlled Temperature Bath
2 h
80°C
Surface Morphology
Optical Microscopy
150:1
125:1
100:1
70:1
50:1
SEM
Mineralogy and Chemical Composition
Adhesion
Photocatalytic Ability
120°C
160°C
200°C
Raman
Intensity (A.u)
Wavenumber (cm )
-1
143.49
Anatase
Air-dried 50:1 solids loading
Nylon-6
EDS
Introduction
Increased use of sutures
Titania exhibits a photocatalytic ability
High processing temperatures limits substrates
Statement
of Aims

Apply titania coating to nylon
Determine phases in coating
Investigate the effect of solids loading and treatment temperature on:
Adhesion
Photocatalytic ability
Uncoated nylon
50:1 solids loading
Methylene Blue Degredation
Solids loading
Temperature
200°C
160°C
120°C
Pull-off tape
Vickers Microhardness
Conclusions
120°C
200°C
150:1
50:1
50 nm
48 nm
31 nm
37 nm
All variables formed a coherent coating on nylon
All coatings adhered well to the substrate
Photocatalyic ability is dependent on treatment temperature
Potential applications as antibacterial sutures

(h)
500 nm
500 nm
500 nm
500 nm
120°C, 160°C or 200°C for 16h
50 μm
50 μm
Full transcript