scholarly journals Gold nanorods or nanospheres? Role of particle shape on tuning the shape memory effect of semicrystalline poly(ε-caprolactone) networks

RSC Advances ◽  
2018 ◽  
Vol 8 (51) ◽  
pp. 29283-29294 ◽  
Author(s):  
Haikun Xu ◽  
Bridgette Maria Budhlall
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Surface Plasmon ◽  
Gold Nanorods ◽  
Light Absorption ◽  
Particle Shape ◽  
Photothermal Effect

Light-triggered shape memory actuation of polycaprolactone was achieved by using the surface plasmon induced photothermal effect of AuNPs. The light absorption wavelengths were tuned without compromising the chemistry and properties of the polymers.

A role of hydrogen in shape memory effect of Ti-Ni alloys

1990 ◽  
Vol 24 (6) ◽  
pp. 1051-1055 ◽  
Author(s):  
N. Wade ◽  
Y. Adachi ◽  
Y. Hosoi
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Ni Alloys

scholarly journals Towards unraveling the moisture-induced shape memory effect of wood: the role of interface mechanics revealed by upscaling atomistic to composite modeling

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Chi Zhang ◽  
Mingyang Chen ◽  
Sinan Keten ◽  
Dominique Derome ◽  
Jan Carmeliet
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Cell Walls ◽  
Moisture Sorption ◽  
Cellulose Fiber ◽  
Recovery Process ◽  
Fiber Network ◽  
Interface Mechanics

AbstractThe moisture-induced shape memory effect (SME) is one of the most intriguing phenomena of wood, where wood can stably retain a certain deformed shape and, upon moisture sorption, can recover the original shape. Despite the long history of wood utilization, the SME is still not fully understood. Combining molecular dynamics (MD) and finite-element (FE) modeling, a possible mechanism of the SME of wood cell walls is explored, emphasizing the role of interface mechanics, a factor previously overlooked. Interface mechanics extracted from molecular simulations are implemented in different mechanical models solved by FEs, representing three configurations encountered in wood cell walls. These models incorporate moisture-dependent elastic moduli of the matrix and moisture-dependent behavior of the interface. One configuration, denoted as a mechanical hotspot with a fiber–fiber interface, is found to particularly strengthen the SME. Systematic parametric studies reveal that interface mechanics could be the source of shape memory. Notably, upon wetting, the interface is weak and soft, and the material can be easily deformed. Upon drying, the interface becomes strong and stiff, and composite deformation can be locked. When the interface is wetted again and weakened, the previously locked deformation cannot be sustained, and recovery occurs. The elastic energy and topological information stored in the cellulose fiber network is the driving force of the recovery process. This work proposes an interface behaving as a moisture-induced molecular switch.

Role of thermal martensite in shape memory effect of CoAl and CoNi alloys

2017 ◽  
Vol 27 (2) ◽  
pp. 382-389 ◽  
Author(s):  
Bing-jie WU ◽  
Xiao YANG ◽  
Hua-bei PENG ◽  
Yu-hua WEN
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect

Role of carbon in improving the shape memory effect of Fe–Mn–Si–Cr–Ni alloys by thermo-mechanical treatments

2015 ◽  
Vol 24 (5) ◽  
pp. 055010 ◽  
Author(s):  
Huabei Peng ◽  
Fan Song ◽  
Shanling Wang ◽  
Chengyan Zhang ◽  
Yuhua Wen
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Ni Alloys

Role of external applied stress on the two-way shape memory effect

2006 ◽  
Vol 438-440 ◽  
pp. 431-435 ◽  
Author(s):  
X.M. Zhang ◽  
J. Fernandez ◽  
J.M. Guilemany
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Applied Stress
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