Incorporating polyrotaxane materials in dielectric elastomer actuators

Research output: Contribution to conferenceConference abstract for conferenceResearchpeer-review

Abstract

Polyrotaxane materials composed of threaded molecular rings can be assembled into a novel type of elastomeric material that has moving cross-linking points instead of the stationary cross-linking points seen in conventional networks. These sliding cross-links impart unique mechanical properties due to a molecular scale phenomenon caused by the sliding entropy that is commonly called the pulley effect. When a force is applied to the material, the sliding cross-links dissipate stress throughout the material in a similar manner to a pulley. This allows for the design of softer elastomers with higher strains at break.Additionally, the sliding elastomers have been seen to exhibit low hysteresis during cyclic loading which has been attributed to the air-spring like behavior of the threaded cyclic rings. These mechanical properties are desirable for dielectric elastomer actuators (DEAs) where softer materials enable higher degrees of actuation and where low hysteresis is necessary for their energy efficient operation. It is thus of interest to incorporate polyrotaxane cross-linkers to existing polysiloxane based DEA platforms. Here, we propose a synthetic pathway to create polyrotaxane cross-linkers based on polyethylene glycol and α-cyclodextrin that contain vinyl groups allowing them to be incorporated into polysiloxane networks through hydrosilylation. This type of curing chemistry is commonly used in silicone elastomers due to its high efficiency and selectivity.
Original languageEnglish
Publication date2019
Number of pages1
Publication statusPublished - 2019
Event9th International Conference on Electromechanically Active Polymer (EAP) Transducers & Artificial Muscles (EuroEAP 2019) - Dresden, Germany
Duration: 4 Jun 20196 Jun 2019

Conference

Conference9th International Conference on Electromechanically Active Polymer (EAP) Transducers & Artificial Muscles (EuroEAP 2019)
CountryGermany
CityDresden
Period04/06/201906/06/2019

Cite this

Tran, J-A., Madsen, J., & Skov, A. L. (2019). Incorporating polyrotaxane materials in dielectric elastomer actuators. Abstract from 9th International Conference on Electromechanically Active Polymer (EAP) Transducers & Artificial Muscles (EuroEAP 2019), Dresden, Germany.
Tran, Jakob-Anhtu ; Madsen, Jeppe ; Skov, Anne Ladegaard. / Incorporating polyrotaxane materials in dielectric elastomer actuators. Abstract from 9th International Conference on Electromechanically Active Polymer (EAP) Transducers & Artificial Muscles (EuroEAP 2019), Dresden, Germany.1 p.
@conference{30be1aa4d5564ad0a3a74f8ef3d307f1,
title = "Incorporating polyrotaxane materials in dielectric elastomer actuators",
abstract = "Polyrotaxane materials composed of threaded molecular rings can be assembled into a novel type of elastomeric material that has moving cross-linking points instead of the stationary cross-linking points seen in conventional networks. These sliding cross-links impart unique mechanical properties due to a molecular scale phenomenon caused by the sliding entropy that is commonly called the pulley effect. When a force is applied to the material, the sliding cross-links dissipate stress throughout the material in a similar manner to a pulley. This allows for the design of softer elastomers with higher strains at break.Additionally, the sliding elastomers have been seen to exhibit low hysteresis during cyclic loading which has been attributed to the air-spring like behavior of the threaded cyclic rings. These mechanical properties are desirable for dielectric elastomer actuators (DEAs) where softer materials enable higher degrees of actuation and where low hysteresis is necessary for their energy efficient operation. It is thus of interest to incorporate polyrotaxane cross-linkers to existing polysiloxane based DEA platforms. Here, we propose a synthetic pathway to create polyrotaxane cross-linkers based on polyethylene glycol and α-cyclodextrin that contain vinyl groups allowing them to be incorporated into polysiloxane networks through hydrosilylation. This type of curing chemistry is commonly used in silicone elastomers due to its high efficiency and selectivity.",
author = "Jakob-Anhtu Tran and Jeppe Madsen and Skov, {Anne Ladegaard}",
year = "2019",
language = "English",
note = "9th International Conference on Electromechanically Active Polymer (EAP) Transducers & Artificial Muscles (EuroEAP 2019) ; Conference date: 04-06-2019 Through 06-06-2019",

}

Tran, J-A, Madsen, J & Skov, AL 2019, 'Incorporating polyrotaxane materials in dielectric elastomer actuators', 9th International Conference on Electromechanically Active Polymer (EAP) Transducers & Artificial Muscles (EuroEAP 2019), Dresden, Germany, 04/06/2019 - 06/06/2019.

Incorporating polyrotaxane materials in dielectric elastomer actuators. / Tran, Jakob-Anhtu; Madsen, Jeppe; Skov, Anne Ladegaard.

2019. Abstract from 9th International Conference on Electromechanically Active Polymer (EAP) Transducers & Artificial Muscles (EuroEAP 2019), Dresden, Germany.

Research output: Contribution to conferenceConference abstract for conferenceResearchpeer-review

TY - ABST

T1 - Incorporating polyrotaxane materials in dielectric elastomer actuators

AU - Tran, Jakob-Anhtu

AU - Madsen, Jeppe

AU - Skov, Anne Ladegaard

PY - 2019

Y1 - 2019

N2 - Polyrotaxane materials composed of threaded molecular rings can be assembled into a novel type of elastomeric material that has moving cross-linking points instead of the stationary cross-linking points seen in conventional networks. These sliding cross-links impart unique mechanical properties due to a molecular scale phenomenon caused by the sliding entropy that is commonly called the pulley effect. When a force is applied to the material, the sliding cross-links dissipate stress throughout the material in a similar manner to a pulley. This allows for the design of softer elastomers with higher strains at break.Additionally, the sliding elastomers have been seen to exhibit low hysteresis during cyclic loading which has been attributed to the air-spring like behavior of the threaded cyclic rings. These mechanical properties are desirable for dielectric elastomer actuators (DEAs) where softer materials enable higher degrees of actuation and where low hysteresis is necessary for their energy efficient operation. It is thus of interest to incorporate polyrotaxane cross-linkers to existing polysiloxane based DEA platforms. Here, we propose a synthetic pathway to create polyrotaxane cross-linkers based on polyethylene glycol and α-cyclodextrin that contain vinyl groups allowing them to be incorporated into polysiloxane networks through hydrosilylation. This type of curing chemistry is commonly used in silicone elastomers due to its high efficiency and selectivity.

AB - Polyrotaxane materials composed of threaded molecular rings can be assembled into a novel type of elastomeric material that has moving cross-linking points instead of the stationary cross-linking points seen in conventional networks. These sliding cross-links impart unique mechanical properties due to a molecular scale phenomenon caused by the sliding entropy that is commonly called the pulley effect. When a force is applied to the material, the sliding cross-links dissipate stress throughout the material in a similar manner to a pulley. This allows for the design of softer elastomers with higher strains at break.Additionally, the sliding elastomers have been seen to exhibit low hysteresis during cyclic loading which has been attributed to the air-spring like behavior of the threaded cyclic rings. These mechanical properties are desirable for dielectric elastomer actuators (DEAs) where softer materials enable higher degrees of actuation and where low hysteresis is necessary for their energy efficient operation. It is thus of interest to incorporate polyrotaxane cross-linkers to existing polysiloxane based DEA platforms. Here, we propose a synthetic pathway to create polyrotaxane cross-linkers based on polyethylene glycol and α-cyclodextrin that contain vinyl groups allowing them to be incorporated into polysiloxane networks through hydrosilylation. This type of curing chemistry is commonly used in silicone elastomers due to its high efficiency and selectivity.

M3 - Conference abstract for conference

ER -

Tran J-A, Madsen J, Skov AL. Incorporating polyrotaxane materials in dielectric elastomer actuators. 2019. Abstract from 9th International Conference on Electromechanically Active Polymer (EAP) Transducers & Artificial Muscles (EuroEAP 2019), Dresden, Germany.