scholarly journals Effect of Soft Segments of Waterborne Polyurethane on Organic Vapor Sensitivity of Carbon Black Filled Waterborne Polyurethane Composites

2006 ◽  
Vol 38 (8) ◽  
pp. 799-806 ◽  
Author(s):  
Bin Zhao ◽  
Ruo Wen Fu ◽  
Ming Qiu Zhang ◽  
Hong Yang ◽  
Min Zhi Rong ◽  
...  
Keyword(s):  
Carbon Black ◽  
Waterborne Polyurethane ◽  
Organic Vapor ◽  
Soft Segments ◽  
Polyurethane Composites

Analysis of gas sensing behaviors of carbon black/waterborne polyurethane composites in low concentration organic vapors

2007 ◽  
Vol 42 (12) ◽  
pp. 4575-4580 ◽  
Author(s):  
Bin Zhao ◽  
Ruo Wen Fu ◽  
Ming Qiu Zhang ◽  
Bin Zhang ◽  
Wei Zeng ◽  
...  
Keyword(s):  
Carbon Black ◽  
Gas Sensing ◽  
Waterborne Polyurethane ◽  
Organic Vapors ◽  
Low Concentration ◽  
Polyurethane Composites

Gas sensitivity of carbon black/waterborne polyurethane composites

Carbon ◽  
2004 ◽  
Vol 42 (3) ◽  
pp. 645-651 ◽  
Author(s):  
Shi Guo Chen ◽  
Ji Wen Hu ◽  
Ming Qiu Zhang ◽  
Ming Wei Li ◽  
Min Zhi Rong
Keyword(s):  
Carbon Black ◽  
Waterborne Polyurethane ◽  
Gas Sensitivity ◽  
Polyurethane Composites

scholarly journals Montmorillonite Clay-Based Polyurethane Nanocomposite As Local Triamcinolone Acetonide Delivery System

2011 ◽  
Vol 2011 ◽  
pp. 1-11 ◽  
Author(s):  
Flávia Carmo Horta Pinto ◽  
Armando Silva-Cunha ◽  
Gerson Antônio Pianetti ◽  
Eliane Ayres ◽  
Rodrigo Lambert Oréfice ◽  
...  
Keyword(s):  
Triamcinolone Acetonide ◽  
Delivery System ◽  
Waterborne Polyurethane ◽  
Montmorillonite Clay ◽  
Poly Ethylene Glycol ◽  
X Ray Scattering ◽  
Soft Segments ◽  
Biodegradable Polyurethane ◽  
Poly Ethylene ◽  
Poly Caprolactone

Biodegradable polyurethane was synthesized by preparing aqueous polyurethane dispersion having poly(caprolactone) and poly(ethylene glycol) as soft segments. Montmorillonite particles were delaminated within the waterborne polyurethane to produce a nanocomposite. The triamcinolone acetonide (TA), an important corticoid drug, was dispersed into the nanocomposite followed by a drying step to produce an implantable drug delivery system. Infrared (FTIR) results demonstrated that the original chemical structure of the TA was preserved after incorporation into the nanocomposite. Wide angle (WAXS) and small angle X-ray scattering (SAXS) results suggested that TA and clay do not dramatically change the morphology phase of the polymer although they can interact with each other. The presence of montmorillonite particles in the nanocomposite reduced the rate of TA release as compared to the pure polyurethane and enhanced the mechanical properties of the polymer. The overall results indicate that montmorillonite clay-based polyurethane nanocomposite could be potentially applied as local TA delivery system.

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