TY - JOUR

T1 - Type and distribution of chemical groups from controlled photo-oxidation of gyroid nanoporous 1,2-polybutadiene

A1 - Sagar,Kaushal Shashikant

A1 - Christiansen,Mads Brøkner

A1 - Ndoni,Sokol

AU - Sagar,Kaushal Shashikant

AU - Christiansen,Mads Brøkner

AU - Ndoni,Sokol

PB - Elsevier Ltd.

PY - 2011

Y1 - 2011

N2 - Photo-oxidation of nanoporous polymers is little studied. The high UV penetration depth and high surface concentration in these materials give unprecedented possibilities both in fundamental work on surface photochemistry and in nanotechnological applications related for example to patterned hydrophilicity or refractive index. This is a quantitative study of the photo-oxidation products of nanoporous gyroid 1,2-polybutadiene in air. Irradiation of the porous sample with UV in the wavelength range of 300–400nm enables tuning of the hydrophilicity of the nanoporous polymer through formation of hydrophilic chemical groups, carboxyl and hydroxyls, mainly onto the large air–polymer interface. The nature and abundance of the chemical groups induced by photo-oxidation is identified by solid-state 13C-NMR and FTIR spectroscopy. The distribution of photo-oxidation groups, both relative to the nanometre-scale polymer–air interface, and as a function of irradiation depth in the sample, is studied by gravimetry, titrimetry, ATR-FTIR and energy dispersive X-ray spectroscopy in scanning electron microscopy.

AB - Photo-oxidation of nanoporous polymers is little studied. The high UV penetration depth and high surface concentration in these materials give unprecedented possibilities both in fundamental work on surface photochemistry and in nanotechnological applications related for example to patterned hydrophilicity or refractive index. This is a quantitative study of the photo-oxidation products of nanoporous gyroid 1,2-polybutadiene in air. Irradiation of the porous sample with UV in the wavelength range of 300–400nm enables tuning of the hydrophilicity of the nanoporous polymer through formation of hydrophilic chemical groups, carboxyl and hydroxyls, mainly onto the large air–polymer interface. The nature and abundance of the chemical groups induced by photo-oxidation is identified by solid-state 13C-NMR and FTIR spectroscopy. The distribution of photo-oxidation groups, both relative to the nanometre-scale polymer–air interface, and as a function of irradiation depth in the sample, is studied by gravimetry, titrimetry, ATR-FTIR and energy dispersive X-ray spectroscopy in scanning electron microscopy.

KW - 1,2-Polybutadiene

KW - Nanoporous

KW - Energy dispersive X-ray spectroscopy

KW - Photo-oxidation

U2 - 10.1016/j.polymdegradstab.2011.07.009

DO - 10.1016/j.polymdegradstab.2011.07.009

JO - Polymer Degradation and Stability

JF - Polymer Degradation and Stability

SN - 0141-3910

IS - 10

VL - 96

SP - 1866

EP - 1873

ER -