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- Martinez, Jose Gabriel, 1986-
(författare)
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Conducting polymer actuators: from basic concepts to proprioceptive systems
- 2017
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Ingår i: XXXVIII Reunión del Grupo de Electroquímica de la Real Sociedad Española de Química & XIX Encontro Ibérico Electroquímica, 05th -7th July 2017, Vitoria-Gasteiz, Spain.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Designers and engineers have been dreaming for decades about motors sensing, by themselves, working and surrounding conditions, as biological muscles do originating proprioception. The potential evolutions of self-supported films of conducting polymers or conducting polymers (polypyrrole, polyaniline) coating different microfibers sense working mechanical, thermal, chemical or electrical variables during their oxidation/reduction. Also, the evolution of the muscle potential from electrochemical artificial muscles based on electroactive materials (such as intrinsically conducting polymers), and driven by constant currents, senses, while working, any variation of the mechanical (trailed mass, obstacles, pressure, strain or stress), thermal or chemical conditions of work. One physically uniform artificial muscle includes one electrochemical motor and several sensors working simultaneously under the same driving reaction. Actuating (current and charge) and sensing (potential and energy) magnitudes are present, simultaneously, in the only two connecting wires and can be read by the computer at any time. From basic polymeric, mechanical and electrochemical principles a physicochemical equation describing artificial proprioception has been developed [1]. It includes and describes, simultaneously, the evolution of the muscle potential during actuation as a function of the motor characteristics (rate and sense of the movement, relative position, and required energy) and the working variables (temperature, electrolyte concentration, mechanical conditions and driving current). By changing working conditions experimental results overlap theoretical predictions. The ensemble computer-generator-muscle theoretical equation constitutes and describes artificial mechanical, thermal and chemical proprioception of the system. Proprioceptive tools and most intelligent zoomorphic or anthropomorphic soft robots can be envisaged. The author acknowledges the funding received from Carl Tryggers Stiftelse för Vetenskaplig Forskning.
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| 4. |
- Öhrström, Lars, 1963
(författare)
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El último alquimista en París y otras historias curiosas de la química
- 2014
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Bok (övrigt vetenskapligt/konstnärligt)abstract
- Este es un libro sobre el descubrimiento y el desastre, la guerra y la ciencia - y la relación entre los seres humanos y los elementos químicos que componen nuestro planeta. Lars Öhrström nos acerca a una gran variedad de elementos, del azufre al plomo, a través de historias de personas ordinarias y extraordinarias de todo el mundo. Nos enteraremos de por qué el dirigible Hindenburg fue trágicamente llenado de hidrógeno en lugar de helio o qué quitaesmalte de uñas jugó un papel clave en la primera guerra mundial. En cada capítulo, nos conoceremos las propiedades específicas de cada elemento y de los conceptos y principios que han permitido a los científicos darles un uso práctico. Estas son las fascinantes (y a veces terroríficas) historias de la química en acción.
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