Enhanced, hydrophobic, initial-shape programmable shape-memory composites with a bio-based nano-framework via gradient metal-ligand cross-linking

2022 ◽  
pp. 109255
Author(s):  
Xinghuo Wang ◽  
Xueli Yang ◽  
Chuanhui Xu ◽  
Baofeng Lin ◽  
Lihua Fu
Keyword(s):  
Shape Memory ◽  
Cross Linking ◽  
Initial Shape ◽  
Shape Memory Composites ◽  
Metal Ligand

scholarly journals Facile Fabrication of Eucommia Rubber Composites with High Shape Memory Performance

Polymers ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 3479
Author(s):  
Lin Xia ◽  
Jiafeng Meng ◽  
Yuan Ma ◽  
Ping Zhao
Keyword(s):  
Mechanical Properties ◽  
Shape Memory ◽  
Memory Performance ◽  
Analytical Techniques ◽  
Cross Linking ◽  
Rubber Composites ◽  
Restoring Force ◽  
Shape Memory Composites ◽  
Facile Fabrication ◽  
Properties Of Materials

We processed a series of shape memory Eucommia rubber (ER) composites with both carbon–carbon and ionic cross-linking networks via a chemical cross-linking method. The influence of the carbon–carbon cross-linking and ion cross-linking degree of ER composites on curing, mechanical, thermal, and shape memory properties were studied by DSC, DMA, and other analytical techniques. Dicumyl peroxide (DCP) and zinc dimethacrylate (ZDMA) played a key role in preparing ER composites with a double cross-linking structure, where DCP initiated polymerization of ZDMA, and grafted ZDMA onto polymer molecular chains and cross-linked rubber molecular chains. Meanwhile, ZDMA combined with rubber macromolecules to build ionic cross-linking bonds in composites under the action of DCP and reinforced the ER composites. The result showed that the coexistence of these two cross-linking networks provide a sufficient restoring force for deformation of shape memory composites. The addition of ZDMA not only improved the mechanical properties of materials, but also significantly enhanced shape memory performance of composites. In particular, Eucommia rubber composites exhibited outstanding mechanical properties and shape memory performance when DCP content was 0.2 phr.

Self-healing and shape-memory properties of polymeric materials cross-linked by hydrogen bonding and metal–ligand interactions

2019 ◽  
Vol 10 (33) ◽  
pp. 4519-4523 ◽  
Author(s):  
Yuichiro Kobayashi ◽  
Tomohiro Hirase ◽  
Yoshinori Takashima ◽  
Akira Harada ◽  
Hiroyasu Yamaguchi
Keyword(s):  
Hydrogen Bonding ◽  
Shape Memory ◽  
Polymeric Materials ◽  
Cross Linking ◽  
Self Healing ◽  
Shape Memory Properties ◽  
Ligand Interactions ◽  
Non Covalent Interactions ◽  
Covalent Interactions ◽  
Metal Ligand

Polymeric materials were prepared by cross-linking them with two independent non-covalent interactions, namely hydrogen bonding and metal–ligand interactions.

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.

NIR-II light-responsive biodegradable shape memory composites based on cuprorivaite nanosheets for enhanced tissue reconstruction

2021 ◽  
Vol 419 ◽  
pp. 129437
Author(s):  
Chen Yang ◽  
Rui Zheng ◽  
Muhammad Rizwan Younis ◽  
Jundong Shao ◽  
Lian-Hua Fu ◽  
...  
Keyword(s):  
Shape Memory ◽  
Shape Memory Composites ◽  
Tissue Reconstruction

Electrical actuation properties of reduced graphene oxide paper/epoxy-based shape memory composites

2015 ◽  
Vol 106 ◽  
pp. 20-24 ◽  
Author(s):  
Wenxin Wang ◽  
Dongyan Liu ◽  
Yanju Liu ◽  
Jinsong Leng ◽  
Debes Bhattacharyya
Keyword(s):  
Graphene Oxide ◽  
Shape Memory ◽  
Reduced Graphene Oxide ◽  
Electrical Actuation ◽  
Reduced Graphene ◽  
Shape Memory Composites ◽  
Graphene Oxide Paper

Study on sisal-based polyurethane foam with multi-shape memory properties

2021 ◽  
Author(s):  
Lulu Pan ◽  
Jianfeng Ban ◽  
Tiwen Xu ◽  
Ruiquan Liu ◽  
Shaorong Lu
Keyword(s):  
Shape Memory ◽  
Polyurethane Foam ◽  
Cross Linking ◽  
Hydroxyl Groups ◽  
Shape Memory Properties ◽  
New Type ◽  
Shape Memory Polyurethane ◽  
Chemical Cross Linking

A new type of sisal-based shape memory polyurethane foam (SMPU-PSF) was prepared by chemical cross-linking of hydroxyl groups on sisal cellulose (PSF) with polycaprolactone and MDI, which used PSF as...

Shape Memory Composites Applied to the Construction of a Conformable Racing Car Seat

2008 ◽  
Author(s):  
P. D. Leahy ◽  
A. Antonio ◽  
D. W. Radford
Keyword(s):  
Shape Memory ◽  
Car Seat ◽  
Shape Memory Composites

Development of an expert system for evaluation of the strength of matrix shape memory composites

2007 ◽  
Vol 77 (2) ◽  
pp. 241-248 ◽  
Author(s):  
Young Chul Park ◽  
Jin Kyung Lee ◽  
Gyu Chang Lee
Keyword(s):  
Expert System ◽  
Shape Memory ◽  
Shape Memory Composites ◽  
Matrix Shape

scholarly journals Shape Memory Composites for Self-deployable Structures in Aerospace Applications

2014 ◽  
Vol 88 ◽  
pp. 42-47 ◽  
Author(s):  
Loredana Santo ◽  
Fabrizio Quadrini ◽  
Antonio Accettura ◽  
Walter Villadei
Keyword(s):  
Shape Memory ◽  
Deployable Structures ◽  
Aerospace Applications ◽  
Shape Memory Composites
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