High‐Strength, Thermally Activated Shape Memory Hydrogels Based on Hydrogen Bonding between MAAc and NVP

2018 ◽  
Vol 219 (10) ◽  
pp. 1700636 ◽  
Author(s):  
Chao Xu ◽  
Quan Tang ◽  
Haiyang Yang ◽  
Kang Peng ◽  
Xingyuan Zhang
Keyword(s):  
Hydrogen Bonding ◽  
Shape Memory ◽  
High Strength ◽  
Thermally Activated

Hydrogen bonded and ionically crosslinked high strength hydrogels exhibiting Ca2+-triggered shape memory properties and volume shrinkage for cell detachment

2015 ◽  
Vol 3 (30) ◽  
pp. 6347-6354 ◽  
Author(s):  
Zongqing Ren ◽  
Yinyu Zhang ◽  
Yongmao Li ◽  
Bing Xu ◽  
Wenguang Liu
Keyword(s):  
Hydrogen Bonding ◽  
Shape Memory ◽  
High Strength ◽  
Volume Shrinkage ◽  
Cell Detachment ◽  
Shape Memory Properties ◽  
Hydrogen Bonded

Diaminotriazine hydrogen bonding reinforced and Ca2+-crosslinked high strength shape memory hydrogels are fabricated. Ca2+_induced dramatic volume shrinkage is utilized to trigger unharmful cell detachment.

Use of Quadruple Hydrogen Bonding as the Switching Phase in Thermo- and Light-Responsive Shape Memory Hydrogel

2021 ◽  
Author(s):  
Yufang Song ◽  
Yiming Chen ◽  
Ran Chen ◽  
Hongji Zhang ◽  
Dongjian Shi ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Shape Memory ◽  
Quadruple Hydrogen Bonding

scholarly journals Experimental Study and Modeling of the Fatigue Fracture of High-Strength FeMnSi-based Shape Memory Alloy

2020 ◽  
Vol 28 ◽  
pp. 2110-2117
Author(s):  
Fedor S. Belyaev ◽  
Margarita E. Evard ◽  
Eugeny S. Ostropiko ◽  
Aleksandr E. Volkov
Keyword(s):  
Experimental Study ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Fatigue Fracture ◽  
High Strength

scholarly journals Thermally-activated shape memory alloys for retrofitting bridge double-angle connections

2021 ◽  
Vol 245 ◽  
pp. 112827
Author(s):  
Mohammadreza Izadi ◽  
Masoud Motavalli ◽  
Elyas Ghafoori
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Thermally Activated

Engineering bio-inspired peptide–polyurea hybrids with thermo-responsive shape memory behaviour

2021 ◽  
Author(s):  
Daseul Jang ◽  
Chase B. Thompson ◽  
Sourav Chatterjee ◽  
LaShanda T. J. Korley
Keyword(s):  
Hydrogen Bonding ◽  
Secondary Structure ◽  
Shape Memory ◽  
Shape Memory Behaviour ◽  
Peptide Secondary Structure

This paper highlights the influence of peptide secondary structure on the shape memory behaviour of peptidic polyureas, driven by hydrogen bonding arrangement and microphase-separated morphology.

Martensitic transformations γ-ɛ (α) and the shape-memory effect in aging high-strength manganese austenitic steels

2008 ◽  
Vol 106 (6) ◽  
pp. 630-640 ◽  
Author(s):  
V. V. Sagaradze ◽  
V. I. Voronin ◽  
Yu. I. Filippov ◽  
V. A. Kazantsev ◽  
M. L. Mukhin ◽  
...  
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
High Strength ◽  
Martensitic Transformations ◽  
Austenitic Steels

Light Activated Shape Memory Polymer Characterization—Part II

2011 ◽  
Vol 78 (6) ◽  
Author(s):  
Richard V. Beblo ◽  
Lisa Mauck Weiland
Keyword(s):  
Shape Memory ◽  
Thickness Distribution ◽  
Glassy State ◽  
Shape Memory Polymer ◽  
Chemical Kinetic ◽  
Chemical Kinetic Model ◽  
Polymer Characterization ◽  
Thermally Activated ◽  
Rubbery State ◽  
Consistent Method

Presented are the experimental results of two light activated shape memory polymer (LASMP) formulations. The optical stimulus used to activate the materials is detailed including a mapping of the spatial optical intensity at the surface of the sample. From this, results of energy calculations are presented including the amount of energy available for transitioning from the glassy state to the rubbery state and from the rubbery state to the glassy state, highlighting one of the major advantages of LASMP as requiring less energy to transition than thermally activated shape memory polymers. The mechano-optical experimental setup and procedure is detailed and provides a consistent method for evaluating this relatively new class of shape memory polymer. A chemical kinetic model is used to predict both the theoretical glassy state modulus, as only the sample averaged modulus is experimentally attainable, as well as the through thickness distribution of Young’s modulus. The experimental and model results for these second generation LASMP formulations are then compared with earlier LASMP generations (detailed previously in Beblo and Mauck Weiland, 2009, “Light Activated Shape Memory Polymer Characterization,” ASME J. Appl. Mech., 76, pp. 8) and typical thermally activated shape memory polymer.

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