Photocatalytically active TiO2 - Silicone Rubber

Theresa Fischer; Markus Ahrens; Markus Eblenkamp

doi:10.1063/1.5121692

Photocatalytically active TiO₂ - Silicone Rubber

Theresa Fischer
, Markus Ahrens
, Markus Eblenkamp

Engineering and Design

Technical University of Munich

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Scopus citations

Abstract

Bacteria are present in all areas of everyday life and can lead to dangerous infections. Surfaces with antimicrobial properties are used to reduce the risk of infection in sanitary facilities and hospitals. Apart from the addition of biocides or antibiotic agents to synthetic materials, recent research show, that it is possible to use the semiconductor titanium dioxide (TiO₂) to generate antibacterial surfaces. The photocatalytically active TiO₂ leads to the development of reactive oxygen species (ROS) that are able to kill bacteria. The aim of this research is to generate silicone rubbers with a photocatalytically active surface that has the possibility to lead to an antimicrobial property by incorporating the additive TiO₂ into the bulk material. AEROXIDE® TiO₂ P25 was used. As matrix material representatives of the three silicone rubber classes were tested. A room-temperature-vulcanization silicone rubber (RTV), a liquid silicone rubber (LSR) and a high-temperaturevulcanization silicone rubber (HTV) were examined. Compounds with various concentrations of TiO₂ were produced and the influence on the cross-linking reaction was investigated using differential scanning calorimetry (DSC). The photocatalytic effect on the surface of the modified material was studied via contact angle measurements and methylene blue tests. The DSC analysis showed that titanium dioxide inhibits the curing of the additivated RTV and LSR. The incorporation of TiO₂ in the HTV matrix material up to 15 wt% was possible, with an extension of the cross-linking time. The investigation of the HTV siivone rubbers considering the photocatalytic effect yield different results. While the expected photo-induced hydrophilic effect could not be verified for the modified HTV silicone rubbers. However the methylene blue trial showed a high significant discoloration of the titanium dioxide addtivtated HTV polymer and proves that a photocatalytic active HTV silicone rubber surface can be produced using the additive titanium dioxide.

Original language	English
Title of host publication	Proceedings of PPS 2017
Subtitle of host publication	33rd International Conference of the Polymer Processing Society - Conference Papers
Editors	Octavio Manero, Fausto Calderas
Publisher	American Institute of Physics Inc.
ISBN (Electronic)	9780735418820
DOIs	https://doi.org/10.1063/1.5121692
State	Published - 26 Aug 2019
Event	33rd International Conference of the Polymer Processing Society, PPS 2017 - Cancun, Mexico Duration: 10 Dec 2017 → 14 Dec 2017

Publication series

Name	AIP Conference Proceedings
Volume	2139
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Conference

Conference	33rd International Conference of the Polymer Processing Society, PPS 2017
Country/Territory	Mexico
City	Cancun
Period	10/12/17 → 14/12/17

Keywords

Curing density
Photocatalyst
Silicone
Titanium dioxide

Access to Document

10.1063/1.5121692

Cite this

@inproceedings{f6fa6b8b86284de8b78513634e4da97c,

title = "Photocatalytically active TiO2 - Silicone Rubber",

abstract = "Bacteria are present in all areas of everyday life and can lead to dangerous infections. Surfaces with antimicrobial properties are used to reduce the risk of infection in sanitary facilities and hospitals. Apart from the addition of biocides or antibiotic agents to synthetic materials, recent research show, that it is possible to use the semiconductor titanium dioxide (TiO2) to generate antibacterial surfaces. The photocatalytically active TiO2 leads to the development of reactive oxygen species (ROS) that are able to kill bacteria. The aim of this research is to generate silicone rubbers with a photocatalytically active surface that has the possibility to lead to an antimicrobial property by incorporating the additive TiO2 into the bulk material. AEROXIDE{\textregistered} TiO2 P25 was used. As matrix material representatives of the three silicone rubber classes were tested. A room-temperature-vulcanization silicone rubber (RTV), a liquid silicone rubber (LSR) and a high-temperaturevulcanization silicone rubber (HTV) were examined. Compounds with various concentrations of TiO2 were produced and the influence on the cross-linking reaction was investigated using differential scanning calorimetry (DSC). The photocatalytic effect on the surface of the modified material was studied via contact angle measurements and methylene blue tests. The DSC analysis showed that titanium dioxide inhibits the curing of the additivated RTV and LSR. The incorporation of TiO2 in the HTV matrix material up to 15 wt\% was possible, with an extension of the cross-linking time. The investigation of the HTV siivone rubbers considering the photocatalytic effect yield different results. While the expected photo-induced hydrophilic effect could not be verified for the modified HTV silicone rubbers. However the methylene blue trial showed a high significant discoloration of the titanium dioxide addtivtated HTV polymer and proves that a photocatalytic active HTV silicone rubber surface can be produced using the additive titanium dioxide.",

keywords = "Curing density, Photocatalyst, Silicone, Titanium dioxide",

author = "Theresa Fischer and Markus Ahrens and Markus Eblenkamp",

note = "Publisher Copyright: {\textcopyright} 2019 American Institute of Physics Inc.. All rights reserved.; 33rd International Conference of the Polymer Processing Society, PPS 2017 ; Conference date: 10-12-2017 Through 14-12-2017",

year = "2019",

month = aug,

day = "26",

doi = "10.1063/1.5121692",

language = "English",

series = "AIP Conference Proceedings",

publisher = "American Institute of Physics Inc.",

editor = "Octavio Manero and Fausto Calderas",

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Fischer, T, Ahrens, M & Eblenkamp, M 2019, Photocatalytically active TiO₂ - Silicone Rubber. in O Manero & F Calderas (eds), Proceedings of PPS 2017: 33rd International Conference of the Polymer Processing Society - Conference Papers., 180001, AIP Conference Proceedings, vol. 2139, American Institute of Physics Inc., 33rd International Conference of the Polymer Processing Society, PPS 2017, Cancun, Mexico, 10/12/17. https://doi.org/10.1063/1.5121692

Photocatalytically active TiO₂ - Silicone Rubber. / Fischer, Theresa; Ahrens, Markus; Eblenkamp, Markus.
Proceedings of PPS 2017: 33rd International Conference of the Polymer Processing Society - Conference Papers. ed. / Octavio Manero; Fausto Calderas. American Institute of Physics Inc., 2019. 180001 (AIP Conference Proceedings; Vol. 2139).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Fischer, Theresa

AU - Ahrens, Markus

AU - Eblenkamp, Markus

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N2 - Bacteria are present in all areas of everyday life and can lead to dangerous infections. Surfaces with antimicrobial properties are used to reduce the risk of infection in sanitary facilities and hospitals. Apart from the addition of biocides or antibiotic agents to synthetic materials, recent research show, that it is possible to use the semiconductor titanium dioxide (TiO2) to generate antibacterial surfaces. The photocatalytically active TiO2 leads to the development of reactive oxygen species (ROS) that are able to kill bacteria. The aim of this research is to generate silicone rubbers with a photocatalytically active surface that has the possibility to lead to an antimicrobial property by incorporating the additive TiO2 into the bulk material. AEROXIDE® TiO2 P25 was used. As matrix material representatives of the three silicone rubber classes were tested. A room-temperature-vulcanization silicone rubber (RTV), a liquid silicone rubber (LSR) and a high-temperaturevulcanization silicone rubber (HTV) were examined. Compounds with various concentrations of TiO2 were produced and the influence on the cross-linking reaction was investigated using differential scanning calorimetry (DSC). The photocatalytic effect on the surface of the modified material was studied via contact angle measurements and methylene blue tests. The DSC analysis showed that titanium dioxide inhibits the curing of the additivated RTV and LSR. The incorporation of TiO2 in the HTV matrix material up to 15 wt% was possible, with an extension of the cross-linking time. The investigation of the HTV siivone rubbers considering the photocatalytic effect yield different results. While the expected photo-induced hydrophilic effect could not be verified for the modified HTV silicone rubbers. However the methylene blue trial showed a high significant discoloration of the titanium dioxide addtivtated HTV polymer and proves that a photocatalytic active HTV silicone rubber surface can be produced using the additive titanium dioxide.

AB - Bacteria are present in all areas of everyday life and can lead to dangerous infections. Surfaces with antimicrobial properties are used to reduce the risk of infection in sanitary facilities and hospitals. Apart from the addition of biocides or antibiotic agents to synthetic materials, recent research show, that it is possible to use the semiconductor titanium dioxide (TiO2) to generate antibacterial surfaces. The photocatalytically active TiO2 leads to the development of reactive oxygen species (ROS) that are able to kill bacteria. The aim of this research is to generate silicone rubbers with a photocatalytically active surface that has the possibility to lead to an antimicrobial property by incorporating the additive TiO2 into the bulk material. AEROXIDE® TiO2 P25 was used. As matrix material representatives of the three silicone rubber classes were tested. A room-temperature-vulcanization silicone rubber (RTV), a liquid silicone rubber (LSR) and a high-temperaturevulcanization silicone rubber (HTV) were examined. Compounds with various concentrations of TiO2 were produced and the influence on the cross-linking reaction was investigated using differential scanning calorimetry (DSC). The photocatalytic effect on the surface of the modified material was studied via contact angle measurements and methylene blue tests. The DSC analysis showed that titanium dioxide inhibits the curing of the additivated RTV and LSR. The incorporation of TiO2 in the HTV matrix material up to 15 wt% was possible, with an extension of the cross-linking time. The investigation of the HTV siivone rubbers considering the photocatalytic effect yield different results. While the expected photo-induced hydrophilic effect could not be verified for the modified HTV silicone rubbers. However the methylene blue trial showed a high significant discoloration of the titanium dioxide addtivtated HTV polymer and proves that a photocatalytic active HTV silicone rubber surface can be produced using the additive titanium dioxide.

KW - Curing density

KW - Photocatalyst

KW - Silicone

KW - Titanium dioxide

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DO - 10.1063/1.5121692

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T3 - AIP Conference Proceedings

BT - Proceedings of PPS 2017

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