scholarly journals Sensors: A Printable Optical Time-Temperature Integrator Based on Shape Memory in a Chiral Nematic Polymer Network (Adv. Funct. Mater. 21/2013)

2013 ◽  
Vol 23 (21) ◽  
pp. 2665-2665 ◽  
Author(s):  
Dylan J. D. Davies ◽  
Antonio R. Vaccaro ◽  
Stephen M. Morris ◽  
Nicole Herzer ◽  
Albertus P. H. J. Schenning ◽  
...  
Keyword(s):  
Shape Memory ◽  
Polymer Network ◽  
Chiral Nematic ◽  
Optical Time ◽  
Nematic Polymer ◽  
Time Temperature Integrator

A Printable Optical Time-Temperature Integrator Based on Shape Memory in a Chiral Nematic Polymer Network

2013 ◽  
Vol 23 (21) ◽  
pp. 2723-2727 ◽  
Author(s):  
Dylan J. D. Davies ◽  
Antonio R. Vaccaro ◽  
Stephen M. Morris ◽  
Nicole Herzer ◽  
Albertus P. H. J. Schenning ◽  
...  
Keyword(s):  
Shape Memory ◽  
Polymer Network ◽  
Chiral Nematic ◽  
Optical Time ◽  
Nematic Polymer ◽  
Time Temperature Integrator

scholarly journals Photonic Shape Memory Chiral Nematic Polymer Coatings with Changing Surface Topography and Color

2019 ◽  
Vol 7 (19) ◽  
pp. 1900592 ◽  
Author(s):  
Koen Nickmans ◽  
Danielle A. C. der Heijden ◽  
Albert P. H. J. Schenning
Keyword(s):  
Shape Memory ◽  
Surface Topography ◽  
Polymer Coatings ◽  
Chiral Nematic ◽  
Nematic Polymer

scholarly journals Shape memory polymer network with thermally distinct elasticity and plasticity

2016 ◽  
Vol 2 (1) ◽  
pp. e1501297 ◽  
Author(s):  
Qian Zhao ◽  
Weike Zou ◽  
Yingwu Luo ◽  
Tao Xie
Keyword(s):  
Shape Memory ◽  
Molecular Design ◽  
Shape Change ◽  
Shape Memory Polymer ◽  
Polymer Network ◽  
Stimuli Responsive ◽  
Responsive Materials ◽  
Device Applications ◽  
Temperature Ranges ◽  
Rational Molecular Design

Stimuli-responsive materials with sophisticated yet controllable shape-changing behaviors are highly desirable for real-world device applications. Among various shape-changing materials, the elastic nature of shape memory polymers allows fixation of temporary shapes that can recover on demand, whereas polymers with exchangeable bonds can undergo permanent shape change via plasticity. We integrate the elasticity and plasticity into a single polymer network. Rational molecular design allows these two opposite behaviors to be realized at different temperature ranges without any overlap. By exploring the cumulative nature of the plasticity, we demonstrate easy manipulation of highly complex shapes that is otherwise extremely challenging. The dynamic shape-changing behavior paves a new way for fabricating geometrically complex multifunctional devices.

scholarly journals Effect of Crosslinkers on Optical and Mechanical Behavior of Chiral Nematic Liquid Crystal Elastomers

Molecules ◽  
2021 ◽  
Vol 26 (20) ◽  
pp. 6193
Author(s):  
Kyosun Ku ◽  
Kyohei Hisano ◽  
Kyoko Yuasa ◽  
Tomoki Shigeyama ◽  
Norihisa Akamatsu ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Polymer Network ◽  
Molar Ratio ◽  
Stimuli Responsive ◽  
Breaking Strain ◽  
Responsive Materials ◽  
Sensor Applications ◽  
Color Changes ◽  
Chiral Nematic ◽  
Liquid Crystal Elastomers

Chiral nematic (N*) liquid crystal elastomers (LCEs) are suitable for fabricating stimuli-responsive materials. As crosslinkers considerably affect the N*LCE network, we investigated the effects of crosslinking units on the physical properties of N*LCEs. The N*LCEs were synthesized with different types of crosslinkers, and the relationship between the N*LC polymeric system and the crosslinking unit was investigated. The N*LCEs emit color by selective reflection, in which the color changes in response to mechanical deformation. The LC-type crosslinker decreases the helical twisting power of the N*LCE by increasing the total molar ratio of the mesogenic compound. The N*LCE exhibits mechano-responsive color changes by coupling the N*LC orientation and the polymer network, where the N*LCEs exhibit different degrees of pitch variation depending on the crosslinker. Moreover, the LC-type crosslinker increases the Young’s modulus of N*LCEs, and the long methylene chains increase the breaking strain. An analysis of experimental results verified the effect of the crosslinkers, providing a design rationale for N*LCE materials in mechano-optical sensor applications.

scholarly journals Programming a crystalline shape memory polymer network with thermo- and photo-reversible bonds toward a single-component soft robot

2018 ◽  
Vol 4 (1) ◽  
pp. eaao3865 ◽  
Author(s):  
Binjie Jin ◽  
Huijie Song ◽  
Ruiqi Jiang ◽  
Jizhou Song ◽  
Qian Zhao ◽  
...  
Keyword(s):  
Shape Memory ◽  
Shape Memory Polymer ◽  
Polymer Network ◽  
Single Component ◽  
Soft Robot

An annulus fibrosus closure device based on a biodegradable shape-memory polymer network

Biomaterials ◽  
2013 ◽  
Vol 34 (33) ◽  
pp. 8105-8113 ◽  
Author(s):  
Shahriar Sharifi ◽  
Theo G. van Kooten ◽  
Hendrik-Jan C. Kranenburg ◽  
Björn P. Meij ◽  
Marc Behl ◽  
...  
Keyword(s):  
Shape Memory ◽  
Annulus Fibrosus ◽  
Shape Memory Polymer ◽  
Polymer Network ◽  
Closure Device

scholarly journals Modification of the twist angle in chiral nematic polymer films by photoisomerization of the chiral dopant

1999 ◽  
Vol 85 (11) ◽  
pp. 7517-7521 ◽  
Author(s):  
Peter van de Witte ◽  
Edda E. Neuteboom ◽  
Martin Brehmer ◽  
Johan Lub
Keyword(s):  
Polymer Films ◽  
Twist Angle ◽  
Chiral Nematic ◽  
Nematic Polymer

scholarly journals Tough interpenetrating polymer network of silicone containing polyurethane and polystyrene with self-healing, shape memory and self-cleaning attributes

RSC Advances ◽  
2018 ◽  
Vol 8 (31) ◽  
pp. 17044-17055 ◽  
Author(s):  
Tuhin Ghosh ◽  
Niranjan Karak
Keyword(s):  
Shape Memory ◽  
Polymer Network ◽  
Interpenetrating Polymer Network ◽  
Self Healing ◽  
Self Cleaning

A tough IPN of silicone containing polyurethane and polystyrene with smart attributes like self-healing, shape memory and self-cleaning is reported.

Silver-coordination polymer network combining antibacterial action and shape memory capabilities

RSC Advances ◽  
2014 ◽  
Vol 4 (61) ◽  
pp. 32276-32282 ◽  
Author(s):  
Lin Wang ◽  
Wenxi Wang ◽  
Shubin Di ◽  
Xifeng Yang ◽  
Hongmei Chen ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Coordination Polymer ◽  
Shape Memory ◽  
Memory Function ◽  
Polymer Network ◽  
Antibacterial Action

An Ag-coordination polymer network displays a shape memory function and simultaneously allows Ag ions to be released to exert an antibacterial activity.

scholarly journals Multiple shape memory polymers based on laminates formed from thiol-click chemistry based polymerizations

Soft Matter ◽  
2015 ◽  
Vol 11 (34) ◽  
pp. 6852-6858 ◽  
Author(s):  
M. Podgórski ◽  
C. Wang ◽  
C. N. Bowman
Keyword(s):  
Shape Memory ◽  
Click Chemistry ◽  
Polymer Network ◽  
Shape Memory Polymers

Polymer network trilayer laminates formed by thiol-Michael and thiol-isocyanate click chemistries, and their subsequent implementation and evaluation for quadruple shape memory (QSM) behavior is presented.

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