Photobleaching effect in azo-dye containing epoxy resin films: The potentiality of carbon nanotubes as azo-dye dispensers
Azo-dye molecules may suffer from bleaching under certain illumination conditions. When this photoinduced process occurs, it generates an irreversible effect that is characterized by the loss of absorption of the dye molecule. Moreover, the well-known isomerization of azodye molecules does not occur...
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2015
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17426588_v605_n1_p_Costanzo http://hdl.handle.net/20.500.12110/paper_17426588_v605_n1_p_Costanzo |
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paper:paper_17426588_v605_n1_p_Costanzo2023-06-08T16:27:36Z Photobleaching effect in azo-dye containing epoxy resin films: The potentiality of carbon nanotubes as azo-dye dispensers Bleaching Carbon Carbon films Cleaning Composite materials Dispensers Epoxy resins Light sensitive materials Molecules Multiwalled carbon nanotubes (MWCN) Photobleaching Photosensitivity Polymer films Semiconducting films Yarn Illumination conditions Irreversible effects Non-covalent interaction Photobleaching effect Photoinduced birefringence Photoinduced process Photosensitive materials Weak interactions Azo dyes Azo-dye molecules may suffer from bleaching under certain illumination conditions. When this photoinduced process occurs, it generates an irreversible effect that is characterized by the loss of absorption of the dye molecule. Moreover, the well-known isomerization of azodye molecules does not occur anymore. In this work it is shown how the addition of a small amount of multi-walled carbon nanotubes (MWCNTs) helps to decrease the bleaching effect in a photosensitive guest-host azo-polymer film. Two different systems were fabricated using an epoxy resin as polymer matrix. An azo-dye, Disperse Orange 3, was used as photosensitive material in both systems and MWCNTs were added into one of them. The optical response of the polymeric systems was studied considering the degree of photoinduced birefringence. Photobleaching of the azo-dye was observed in all cases however, the effect is lower for the composite material containing 0.2 wt % MWCNTs. The weak interaction between MWCNTs and dye molecules is less favorable when the material is heated. The optical behavior of the heated composite material suggests that carbon nanotubes can be potentially used as azo dye dispensers. The results are interpreted in terms of the non-covalent interaction between azo-dye molecules and MWCNTs. © Published under licence by IOP Publishing Ltd. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17426588_v605_n1_p_Costanzo http://hdl.handle.net/20.500.12110/paper_17426588_v605_n1_p_Costanzo |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Bleaching Carbon Carbon films Cleaning Composite materials Dispensers Epoxy resins Light sensitive materials Molecules Multiwalled carbon nanotubes (MWCN) Photobleaching Photosensitivity Polymer films Semiconducting films Yarn Illumination conditions Irreversible effects Non-covalent interaction Photobleaching effect Photoinduced birefringence Photoinduced process Photosensitive materials Weak interactions Azo dyes |
| spellingShingle |
Bleaching Carbon Carbon films Cleaning Composite materials Dispensers Epoxy resins Light sensitive materials Molecules Multiwalled carbon nanotubes (MWCN) Photobleaching Photosensitivity Polymer films Semiconducting films Yarn Illumination conditions Irreversible effects Non-covalent interaction Photobleaching effect Photoinduced birefringence Photoinduced process Photosensitive materials Weak interactions Azo dyes Photobleaching effect in azo-dye containing epoxy resin films: The potentiality of carbon nanotubes as azo-dye dispensers |
| topic_facet |
Bleaching Carbon Carbon films Cleaning Composite materials Dispensers Epoxy resins Light sensitive materials Molecules Multiwalled carbon nanotubes (MWCN) Photobleaching Photosensitivity Polymer films Semiconducting films Yarn Illumination conditions Irreversible effects Non-covalent interaction Photobleaching effect Photoinduced birefringence Photoinduced process Photosensitive materials Weak interactions Azo dyes |
| description |
Azo-dye molecules may suffer from bleaching under certain illumination conditions. When this photoinduced process occurs, it generates an irreversible effect that is characterized by the loss of absorption of the dye molecule. Moreover, the well-known isomerization of azodye molecules does not occur anymore. In this work it is shown how the addition of a small amount of multi-walled carbon nanotubes (MWCNTs) helps to decrease the bleaching effect in a photosensitive guest-host azo-polymer film. Two different systems were fabricated using an epoxy resin as polymer matrix. An azo-dye, Disperse Orange 3, was used as photosensitive material in both systems and MWCNTs were added into one of them. The optical response of the polymeric systems was studied considering the degree of photoinduced birefringence. Photobleaching of the azo-dye was observed in all cases however, the effect is lower for the composite material containing 0.2 wt % MWCNTs. The weak interaction between MWCNTs and dye molecules is less favorable when the material is heated. The optical behavior of the heated composite material suggests that carbon nanotubes can be potentially used as azo dye dispensers. The results are interpreted in terms of the non-covalent interaction between azo-dye molecules and MWCNTs. © Published under licence by IOP Publishing Ltd. |
| title |
Photobleaching effect in azo-dye containing epoxy resin films: The potentiality of carbon nanotubes as azo-dye dispensers |
| title_short |
Photobleaching effect in azo-dye containing epoxy resin films: The potentiality of carbon nanotubes as azo-dye dispensers |
| title_full |
Photobleaching effect in azo-dye containing epoxy resin films: The potentiality of carbon nanotubes as azo-dye dispensers |
| title_fullStr |
Photobleaching effect in azo-dye containing epoxy resin films: The potentiality of carbon nanotubes as azo-dye dispensers |
| title_full_unstemmed |
Photobleaching effect in azo-dye containing epoxy resin films: The potentiality of carbon nanotubes as azo-dye dispensers |
| title_sort |
photobleaching effect in azo-dye containing epoxy resin films: the potentiality of carbon nanotubes as azo-dye dispensers |
| publishDate |
2015 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17426588_v605_n1_p_Costanzo http://hdl.handle.net/20.500.12110/paper_17426588_v605_n1_p_Costanzo |
| _version_ |
1768545574773063680 |