Copolymer Networks From Oligo(ε-caprolactone) andn-Butyl Acrylate Enable a Reversible Bidirectional Shape-Memory Effect at Human Body Temperature

2015 ◽  
Vol 36 (10) ◽  
pp. 880-884 ◽  
Author(s):  
Mersa Saatchi ◽  
Marc Behl ◽  
Ulrich Nöchel ◽  
Andreas Lendlein
Keyword(s):  
Body Temperature ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Human Body ◽  
Butyl Acrylate ◽  
Human Body Temperature

scholarly journals Fabrication and Shape Memory Characteristics of Highly Porous Ti-Nb-Mo Biomaterials

2017 ◽  
Vol 62 (2) ◽  
pp. 1367-1370 ◽  
Author(s):  
Y.-W. Kim ◽  
T.W. Mukarati
Keyword(s):  
Martensitic Transformation ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Differential Scanning Calorimetric ◽  
Porous Scaffolds ◽  
High Porosity ◽  
Porous Ti ◽  
Human Body Temperature ◽  
Rapidly Solidified

AbstractNon-toxic Ti-Nb-Mo scaffolds were fabricated by sintering rapidly solidified alloy fibers for biomedical applications. Microstructure and martensitic transformation behaviors of the porous scaffolds were investigated by means of differential scanning calorimetric and X-ray diffraction. Theα″–βtransformation occurs in the as-solidified fiber and the sintered scaffolds. According to the compressive test of the sintered scaffolds with 75% porosity, they exhibit good superelasticity and strain recovery ascribed to the stress-induced martensitic transformation and the shape memory effect. Because of the high porosity of the scaffolds, an elastic modulus of 1.4 GPa, which matches well with that of cancellous bone, could be obtained. The austenite transformation finishing temperature of 77Ti-18Nb-5Mo alloy scaffolds is 5.1°C which is well below the human body temperature, and then all mechanical properties and shape memory effect of the porous 77Ti-18Nb-5Mo scaffolds are applicable for bon replacement implants.

scholarly journals Highly Tough Hydrogels with the Body Temperature-Responsive Shape Memory Effect

2019 ◽  
Vol 11 (46) ◽  
pp. 43563-43572 ◽  
Author(s):  
Ruixue Liang ◽  
Haojie Yu ◽  
Li Wang ◽  
Long Lin ◽  
Nan Wang ◽  
...  
Keyword(s):  
Body Temperature ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
The Body ◽  
Temperature Responsive

Thermal Annealing to Modulate the Shape Memory Behavior of a Biobased and Biocompatible Triblock Copolymer Scaffold in the Human Body Temperature Range

2017 ◽  
Vol 18 (8) ◽  
pp. 2499-2508 ◽  
Author(s):  
Andrea Merlettini ◽  
Matteo Gigli ◽  
Martina Ramella ◽  
Chiara Gualandi ◽  
Michelina Soccio ◽  
...  
Keyword(s):  
Body Temperature ◽  
Shape Memory ◽  
Thermal Annealing ◽  
Human Body ◽  
Triblock Copolymer ◽  
Temperature Range ◽  
Shape Memory Behavior ◽  
Human Body Temperature

scholarly journals Body-Temperature Programmable Soft-Shape Memory Hybrid Sponges for Comfort Fitting

Polymers ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 3501
Author(s):  
Balasundaram Selvan Naveen ◽  
Azharuddin Bin Mohamed Naseem ◽  
Catherine Jia Lin Ng ◽  
Jun Wei Chan ◽  
Rayner Zheng Xian Lee ◽  
...  
Keyword(s):  
Body Temperature ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Mechanical Response ◽  
Cyclic Loads ◽  
Temperature Programming ◽  
Porous Structures ◽  
Good Shape ◽  
Better Than

Porous shape memory hybrids are fabricated with different matrix (silicone) hardness and different inclusion (polycaprolactone, PCL) ratios. They are characterized to obtain their mechanical response to cyclic loads (with/without pre-straining/programming) and their shape memory performances after body-temperature programming are investigated. These materials are lightweight due to their porous structures. Wetted hydrogels used in the fabrication process for creating pores are reusable and hence this process is eco-friendly. These porous shape memory hybrids exhibit the good shape memory effect of around 90% with higher inclusion (PCL) ratios, which is better than the solid versions reported in the literature. Hence, it is concluded that these materials have great potential to be used in, for instance, insoles and soles for comfort fitting, as demonstrated.

Tensile Failure of 55-Nitinol Wire

1975 ◽  
Vol 33 ◽  
pp. 46-47
Author(s):  
F. I. Grace
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Stoichiometric Composition ◽  
Tensile Failure ◽  
Initial State ◽  
Initial Shape ◽  
Nitinol Wire ◽  
Cscl Type ◽  
Shear Transformation

An interest in NiTi alloys with near stoichiometric composition (55 NiTi) has intensified since they were found to exhibit a unique mechanical shape memory effect at the Naval Ordnance Laboratory some twelve years ago (thus refered to as NITINOL alloys). Since then, the microstructural mechanisms associated with the shape memory effect have been investigated and several interesting engineering applications have appeared.The shape memory effect implies that the alloy deformed from an initial shape will spontaneously return to that initial state upon heating. This behavior is reported to be related to a diffusionless shear transformation which takes place between similar but slightly different CsCl type structures.

A new type of intrinsic two-way shape-memory effect in hooks of NiTi-wires

2003 ◽  
Vol 112 ◽  
pp. 1177-1180 ◽  
Author(s):  
A. Schuster ◽  
H. F. Voggenreiter ◽  
D. C. Dunand ◽  
G. Eggeler
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
New Type ◽  
Niti Wires
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