Shape changes in chemoresponsive liquid crystal elastomers

التفاصيل البيبلوغرافية
العنوان: Shape changes in chemoresponsive liquid crystal elastomers
المؤلفون: Jennifer M. Boothby, Taylor H. Ware, Hyun Kim
المصدر: Sensors and Actuators B: Chemical. 240:511-518
بيانات النشر: Elsevier BV, 2017.
سنة النشر: 2017
مصطلحات موضوعية: Chemical substance, 02 engineering and technology, 010402 general chemistry, Smart material, 01 natural sciences, Optics, Materials Chemistry, Perpendicular, Electrical and Electronic Engineering, Composite material, Anisotropy, Instrumentation, chemistry.chemical_classification, Chemistry, business.industry, Metals and Alloys, Polymer, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Condensed Matter::Soft Condensed Matter, Solvent, 0210 nano-technology, Actuator, Axial symmetry, business
الوصف: Liquid crystal elastomers are ordered polymers that undergo reversible, anisotropic shape change in response to a number of stimuli, including heat, light, and solvent. In this study, we design liquid crystal elastomers that actuate both axially and torsionally in response to chemical stimuli. We characterize the response of uniaxially-aligned liquid crystal elastomer films exposed to a variety of chemical stimuli of varying quality. In each solvent, there is a contraction along the alignment direction paired with an expansion in the perpendicular directions. Torsional actuation is generated by patterning a twisted alignment through the thickness of the liquid crystal elastomer. These hierarchically-patterned materials reversibly transition from flat to helical with over 200°/mm of twist in chemical vapor. This response is stable for at least 100 cycles. Ultimately, this chemoresponse is combined with mechanical instability to make high-twist torsional actuators with peak velocities of almost 400 RPM.
تدمد: 0925-4005
DOI: 10.1016/j.snb.2016.09.004
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::5b26b9d841d4bdf8fe3c602c3533a297
https://doi.org/10.1016/j.snb.2016.09.004
Rights: CLOSED
رقم الانضمام: edsair.doi...........5b26b9d841d4bdf8fe3c602c3533a297
قاعدة البيانات: OpenAIRE
الوصف
تدمد:09254005
DOI:10.1016/j.snb.2016.09.004