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A Cellulose Liquid Crystal Motor: A Steam Engine of the Second Kind
Scientific Reports
  • Yong Geng
  • Pedro Lucio Almeida
  • Cheng Cheng, Kent State University - Kent Campus
  • Peter Palffy-Muhoray, Kent State University - Kent Campus
  • Maria Helena Godinho
  • Susete Nogueira Fernandes
Publication Date
Document Type
  • films,
  • hydroxypropylcellulose,
  • deformation,
  • elastomers,
  • behavior,
  • water,
  • links
The salient feature of liquid crystal elastomers and networks is strong coupling between orientational order and mechanical strain. Orientational order can be changed by a wide variety of stimuli, including the presence of moisture. Changes in the orientation of constituents give rise to stresses and strains, which result in changes in sample shape. We have utilized this effect to build soft cellulose-based motor driven by humidity. The motor consists of a circular loop of cellulose film, which passes over two wheels. When humid air is present near one of the wheels on one side of the film, with drier air elsewhere, rotation of the wheels results. As the wheels rotate, the humid film dries. The motor runs so long as the difference in humidity is maintained. Our cellulose liquid crystal motor thus extracts mechanical work from a difference in humidity.

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Citation Information
Yong Geng, Pedro Lucio Almeida, Cheng Cheng, Peter Palffy-Muhoray, et al.. "A Cellulose Liquid Crystal Motor: A Steam Engine of the Second Kind" Scientific Reports Vol. 3 (2013)
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