Photo-responsive Diels–Alder-based azobenzene-functionalized main-chain liquid crystal networks
Data files
Feb 14, 2025 version files 4.46 MB
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Figure_2B.txt
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Figure_2C.txt
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Figure_3A_360_nm.txt
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Figure_3A_470_nm.txt
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Figure_3B_Absorbance.txt
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Figure_3B_Temperature.txt
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Figure_3C.txt
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Figure_4A.txt
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Figure_4B.txt
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Figure_4C.txt
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Figure_S1.txt
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Figure_S10.txt
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Figure_S13.txt
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Figure_S14a_0_Cx.txt
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Figure_S14a_10_Cx.txt
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Figure_S14a_2_Cx.txt
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Figure_S14b_10_Cx_0.1Hz.txt
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Figure_S14b_10_Cx_10Hz.txt
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Figure_S14b_2_Cx_0.1Hz.txt
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Figure_S14b_2_Cx_10_Hz.txt
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Figure_S14b_4_Cx_0.1Hz.txt
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Figure_S14b_4_Cx_10Hz.txt
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Figure_S14c_0_Cx.txt
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Figure_S14c_10_Cx.txt
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Figure_S14c_2_Cx.txt
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Figure_S2.txt
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Figure_S3a.txt
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Figure_S3b.txt
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Figure_S9.txt
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Read_ME.txt
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README.md
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Abstract
Light-responsive liquid crystal elastomer networks (LCNs) have received significant interest due to their potential application in soft robotics and shape-morphing devices. Here, we present a systematic examination of light-responsive LCNs prepared using a catalyst-free Diels–Alder cycloaddition and a new azobenzene functionalized monomer for main-chain incorporation. The networks have robust mechanical stiffness that can be reversibly modulated by 1 GPa by turning the UV light on and off. This study highlights the contribution of photothermal softening to reversibly control the rheological properties of the newly developed LCNs and demonstrates the ability to tune the modulus on demand. We believe this work will guide future developments of light-responsive LCNs based on the newly developed Diels–Alder cycloaddition.
https://doi.org/10.5061/dryad.jsxksn0jv
Description of the data and file structure
FIGURE 2B
Tip deflection (nm) as a function of time (s) of a polydomain azobenzene sample
FIGURE 2C
Tip deflection (nm) as a function of time (s) of a monodomain azobenzene sample
FIGURE 3A
I) Absorbance as a function of time (min) at 365 nm
II) Absorbance as a function of time at nm 470
FIGURE 3B
I) Absorbance as a function of time (min)
II) Temperature (degree Celsius) as a function of time (min)
FIGURE 3C
Heat flow of the physically aged, metastable 1, and metastable 2 as a function of temperature
FIGURE 4A
Storage and loss modulus (Pa) as a function of time (min)
FIGURE 4B
Temperature (degree Celsius) as a function of time (min)
FIGURE 4C
Storage modulus as a function of time at different conditions
FIGURE S1
1H-NMR of azobenzene-furan liquid crystal
FIGURE S2
13C-NMR of azobenzene-furan liquid crystal
FIGURE S3
I) Heat flow as a function of the temperature of the evaporated and annealed sample
II) intensity as a function of the angle of a small angle x-ray scattering of the evaporated and the annealed sample---
FIGURE S9
Heat flow as a function of the temperature of AzoLCN after several cycles
FIGURE S10
Intensity of the small angle X-ray scattering before and after UV exposure
FIGURE S13
Storage modulus as a function of time under different conditions
FIGURE S14
I) Storage modulus (Pa) as a function of time (min) at a crosslink loading of 0%
II) Storage modulus (Pa) as a function of time (min) at a crosslink loading of 2%
III) Storage modulus (Pa) as a function of time (min) at a crosslink loading of 10%
IV) Storage modulus (Pa) as a function of time (min) and angular frequency (0.1 Hz) at a crosslink loading of 2%
V) Storage modulus (Pa) as a function of time (min) and angular frequency (10 Hz) at a crosslink loading of 2%
VI) Storage modulus (Pa) as a function of time (min) and angular frequency (0.1 Hz) at a crosslink loading of 4%
VII) Storage modulus (Pa) as a function of time (min) and angular frequency (10 Hz) at a crosslink loading of 4%
VIII) Storage modulus (Pa) as a function of time (min) and angular frequency (0.1 Hz) at a crosslink loading of 10%
IX) Storage modulus (Pa) as a function of time (min) and angular frequency (10 Hz) at a crosslink loading of 10%
X) Intensity as a function of angle at a crosslink loading of 0%
XI) Intensity as a function of angle at a crosslink loading of 2%
XII) Intensity as a function of angle at a crosslink loading of 10%