Multifunctional liquid crystal polymer network soft actuators

2020 ◽  
Vol 8 (6) ◽  
pp. 3390-3396 ◽  
Author(s):  
Li Yu ◽  
Ran Peng ◽  
Geoffrey Rivers ◽  
Che Zhang ◽  
Pengxiang Si ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Liquid Metal ◽  
Large Strain ◽  
Polymer Network ◽  
Liquid Crystal Polymer ◽  
Crystal Polymer ◽  
Soft Actuators

Multifunctional liquid metal/liquid crystal polymer network soft actuators combine ultrahigh conductivity and thermal-responsive actuation behavior under large strain.

Numerical Modeling of Tunable Liquid-Crystal-Polymer-Network Lens

2008 ◽  
Vol 489 (1) ◽  
pp. 40/[366]-53/[379] ◽  
Author(s):  
Svitlana L. Subota ◽  
Victor Yu. Reshetnyak ◽  
Svitlana P. Pavliuchenko ◽  
Timothy J. Sluckin
Keyword(s):  
Numerical Modeling ◽  
Liquid Crystal ◽  
Polymer Network ◽  
Liquid Crystal Polymer ◽  
Crystal Polymer

Photoresponsive Azobenzene Liquid Crystal Polymer Networks: In Situ Photogenerated Stress Measurement

2010 ◽  
Author(s):  
Yanira Torres ◽  
Timothy White ◽  
Amber McClung ◽  
William Oates
Keyword(s):  
Liquid Crystal ◽  
Stress Measurement ◽  
Polymer Network ◽  
Polymer Networks ◽  
Liquid Crystal Polymer ◽  
Polymerization Process ◽  
Polarization Angle ◽  
Structure Property ◽  
Crystal Polymer ◽  
Azobenzene Mesogens

Azobenzene liquid crystal polymers and polymer networks are adaptive materials capable of converting light into mechanical work. Often, the photomechanical output of the azobenzene liquid crystal network (azo-LCN) is observed as a bending cantilever. The response of these materials can be either static (e.g. a simple bending cantilever) or dynamic (e.g. oscillating cantilever of 20–270 Hz). The resulting photomechanical output is dependent upon the domain orientation of the polymer network and the wavelength and polarization of the actinic light. Polydomain azobenzene liquid crystal polymer networks, which have the capability of bending both backwards and forwards with the change of polarization angle, are of particular interest. In the current study, three azo-LCNs are compared — two of them are equivalent in all respects except for one contains pendant azobenzene mesogens (1azo, azo-monoacrylate) and the other contains crosslinked azobenzene mesogens (2azo, azo-diacrylate). The third specimen has a combination of both mesogens. The mechanical behavior at different temperatures and examination of structure-property relationships in the polymerization process, including curing temperatures and liquid crystal cell alignment rubbing methods, were explored. Using dynamic mechanical analysis (DMA) the mechanical properties and the photogenerated stress and strain in the polymer are examined. It is found the differences in chemistry do correlate to small variation in the speed of photodirected bending, elastic modulus, and glass transition temperature. Despite these differences, all three azo-LCNs display nearly equivalent photogenerated stresses.

scholarly journals Regulating the modulus of a chiral liquid crystal polymer network by light

Soft Matter ◽  
2016 ◽  
Vol 12 (13) ◽  
pp. 3196-3201 ◽  
Author(s):  
Kamlesh Kumar ◽  
Albertus P. H. J. Schenning ◽  
Dirk J. Broer ◽  
Danqing Liu
Keyword(s):  
Liquid Crystal ◽  
Polymer Network ◽  
Liquid Crystal Polymer ◽  
The State ◽  
Chiral Liquid Crystal ◽  
Crystal Polymer ◽  
State Of Matter

We provide a methodology to change the state of matter from hard and glassy to soft and rubbery by light.

scholarly journals Temperature‐ and Light‐Regulated Gas Transport in a Liquid Crystal Polymer Network

2019 ◽  
Vol 29 (28) ◽  
pp. 1900857 ◽  
Author(s):  
Anping Cao ◽  
Roel J. H. Raak ◽  
Xinglong Pan ◽  
Dirk J. Broer
Keyword(s):  
Liquid Crystal ◽  
Gas Transport ◽  
Polymer Network ◽  
Liquid Crystal Polymer ◽  
Crystal Polymer

Photomechanical bending mechanics of polydomain azobenzene liquid crystal polymer network films

2012 ◽  
Vol 112 (1) ◽  
pp. 013513 ◽  
Author(s):  
Liang Cheng ◽  
Yanira Torres ◽  
Kyung Min Lee ◽  
Amber J. McClung ◽  
Jeffery Baur ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Polymer Network ◽  
Liquid Crystal Polymer ◽  
Crystal Polymer
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