Out-of-Autoclave Repair of Composite Laminates by Using Shape Memory Polymer Foams

2019 ◽  
Author(s):  
D. Bellisario ◽  
F. Quadrini ◽  
L. Santo ◽  
L. Iorio ◽  
N. Gallo ◽  
...  
Keyword(s):  
Shape Memory ◽  
Composite Laminates ◽  
Shape Recovery ◽  
Shape Memory Polymer ◽  
Production Equipment ◽  
Polymer Foams ◽  
The Poor ◽  
Compression Strain ◽  
Out Of Autoclave ◽  
The Cost

Abstract Composite repairing is an issue because of the size of the parts, the cost of the production equipment and the poor consolidation between the parent part and the repairing patches. In this study an out-of-autoclave procedure is proposed where the agglomeration pressure is provided by shape memory foams. These foams can be shaped in the desired form by means of a thermos-mechanical cycle, and provide additional pressure if constrained during recovery. Shape recovery is achieved by using the same thermal cycle which is necessary for the cure of the patches. In this study, thermoplastic shape memory foams have been characterized to evaluate the agglomeration pressure they can provide as a function of the compression strain. In order to show the feasibility of their application, the cure of a composite laminate has been performed by using pre-shaped shape memory foams. Results show that a good consolidation is achieved despite of the absence of a vacuum bag.

Biomedical Devices Using Shape Memory Polymer Foams for Treatment of Intracranial Aneurysms

2018 ◽  
Author(s):  
Jingyu Wang ◽  
Jishan Luo ◽  
Robert Kunkel ◽  
Yingtao Liu ◽  
Bradley Bohnstedt ◽  
...  
Keyword(s):  
Shape Memory ◽  
Intracranial Aneurysms ◽  
Shape Recovery ◽  
Shape Memory Polymer ◽  
Endovascular Embolization ◽  
Polymer Foams ◽  
Biomedical Devices ◽  
Successful Completion ◽  
Triggering Mechanism ◽  
Solid Foundation

This paper presents a novel medical device developed using shape memory polymer (SMP) foams for the endovascular treatment of intracranial aneurysms (ICAs). The SMP foam is fabricated, characterized, and experimentally investigated to better understand their potential for endovascular embolization of ICAs. Polyurethane-based SMP is successfully synthesized and characterized. The SMP foam is manufactured using cast molding, and characterized using an electro-thermal triggering mechanism to fully understand their shape recovery capability. The successful completion of this work will serve as a solid foundation for the development of new biomedical devices to treat intracranial aneurysms and develop an optimal releasing procedure for future animal study.

Investigate of Electrical Conductivity of Shape-Memory Polymer Filled with Carbon Black

2008 ◽  
Vol 47-50 ◽  
pp. 714-717 ◽  
Author(s):  
Xin Lan ◽  
Jin Song Leng ◽  
Yan Ju Liu ◽  
Shan Yi Du
Keyword(s):  
Electrical Conductivity ◽  
Carbon Black ◽  
Shape Memory ◽  
Shape Recovery ◽  
Volume Fraction ◽  
Shape Memory Polymer ◽  
Recovery Process ◽  
Thermomechanical Properties ◽  
Electrically Conductive ◽  
New System

A new system of thermoset styrene-based shape-memory polymer (SMP) filled with carbon black (CB) is investigated. To realize the electroactive stimuli of SMP, the electrical conductivity of SMP filled with various amounts of CB is characterized. The percolation threshold of electrically conductive SMP filled with CB is about 3% (volume fraction of CB), which is much lower than many other electrically conductive polymers. When applying a voltage of 30V, the shape recovery process of SMP/CB(10 vol%) can be realized in about 100s. In addition, the thermomechanical properties are also characterized by differential scanning calorimetery (DSC).

scholarly journals Cover Feature: Multifunctional Shape-Memory Polymer Foams with Bio-inspired Antimicrobials (ChemPhysChem 16/2018)

ChemPhysChem ◽  
2018 ◽  
Vol 19 (16) ◽  
pp. 1936-1936
Author(s):  
Mary Beth Browning Monroe ◽  
Alexandra D. Easley ◽  
Katie Grant ◽  
Grace K. Fletcher ◽  
Calla Boyer ◽  
...  
Keyword(s):  
Shape Memory ◽  
Shape Memory Polymer ◽  
Polymer Foams

scholarly journals Electrical actuation and shape recovery control of shape-memory polymer nanocomposites

2013 ◽  
Vol 4 (3) ◽  
pp. 167-178 ◽  
Author(s):  
Fei Liang ◽  
Robert Sivilli ◽  
Jihua Gou ◽  
Yunjun Xu ◽  
Bob Mabbott
Keyword(s):  
Shape Memory ◽  
Polymer Nanocomposites ◽  
Shape Recovery ◽  
Shape Memory Polymer ◽  
Electrical Actuation

scholarly journals Increased X-ray Visualization of Shape Memory Polymer Foams by Chemical Incorporation of Iodine Motifs

Polymers ◽  
2017 ◽  
Vol 9 (12) ◽  
pp. 381 ◽  
Author(s):  
Landon Nash ◽  
Mary Browning Monroe ◽  
Yong-Hong Ding ◽  
Kendal Ezell ◽  
Anthony Boyle ◽  
...  
Keyword(s):  
Shape Memory ◽  
Shape Memory Polymer ◽  
Polymer Foams ◽  
X Ray

Characristics of Shape Memory Composites Combined with Shape Memory Alloy and Shape Memory Polymer

2013 ◽  
Vol 705 ◽  
pp. 169-172
Author(s):  
Xue Feng ◽  
Li Min Zhao ◽  
Xu Jun Mi
Keyword(s):  
Shape Memory ◽  
Room Temperature ◽  
Shape Recovery ◽  
Volume Fraction ◽  
Shape Memory Polymer ◽  
Young Modulus ◽  
Thermomechanical Properties ◽  
The Matrix ◽  
Shape Memory Composites ◽  
Shape Fixity

In order to develop high functionality of shape memory materials, the shape memory composites combined with TiNi wire and shape memory epoxy were prepared, and the mechanical and thermomechanical properties were studied. The results showed the addition of TiNi wire increased the Young modulus and breaking strength both at room temperature and at elevated temperature. The composites maintained the rates of shape fixity and shape recovery close to 100%. The maximum recovery stress increased with increasing TiNi wire volume fraction, and obtained almost 3 times of the matrix by adding 1vol% TiNi wire.

Origami-inspired shape memory dual-matrix composite structures

2019 ◽  
Vol 30 (17) ◽  
pp. 2639-2647
Author(s):  
O-Hyun Kwon ◽  
Jin-Ho Roh
Keyword(s):  
Shape Memory ◽  
Polymer Composite ◽  
Matrix Composite ◽  
Composite Structures ◽  
Shape Recovery ◽  
Shape Memory Polymer ◽  
Tensile Tests ◽  
Woven Fabrics ◽  
Morphing Structure ◽  
Composite Skins

A sandwiched morphing structure is developed using an Origami-inspired shape memory dual-matrix composite core and shape memory polymer composite skins. The geometric parameters of the morphing structure are designed to have a zero Poisson’s ratio. In addition, an analytical model is developed to analyze the three-dimensional morphing structure easily. The shape memory dual-matrix composites are fabricated with woven fabrics based on the shape memory polymers, and an epoxy matrix is used to ensure a flexible and shape-recoverable structure. The shape recoverability of the shape memory polymer composite skins is verified by measuring the shape recovery ratio at various temperatures. Based on the tensile tests for the shape memory polymer composite skins and shape memory polymer hinges, it is found that the morphing structure can be highly flexible depending on temperature. Finally, the bending and shape recovery behaviors of the morphing structure are demonstrated.

Development of multifunctional shape memory polymer foams

2015 ◽  
Author(s):  
Janice J. Song ◽  
Ijya Srivastava ◽  
Hani E. Naguib
Keyword(s):  
Shape Memory ◽  
Shape Memory Polymer ◽  
Polymer Foams
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