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

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 Chemical Modifications of Porous Shape Memory Polymers for Enhanced X-ray and MRI Visibility

Molecules ◽  
2020 ◽  
Vol 25 (20) ◽  
pp. 4660
Author(s):  
Grace K. Fletcher ◽  
Landon D. Nash ◽  
Lance M. Graul ◽  
Lindy K. Jang ◽  
Scott M. Herting ◽  
...  
Keyword(s):  
Shape Memory ◽  
Medical Devices ◽  
Shape Memory Polymer ◽  
Shape Memory Polymers ◽  
Tissue Scaffolds ◽  
Resonance Imaging ◽  
Clinical Imaging ◽  
X Ray ◽  
Device Development ◽  
Magnetic Resonance Imaging Mri

The goal of this work was to develop a shape memory polymer (SMP) foam with visibility under both X-ray and magnetic resonance imaging (MRI) modalities. A porous polymeric material with these properties is desirable in medical device development for applications requiring thermoresponsive tissue scaffolds with clinical imaging capabilities. Dual modality visibility was achieved by chemically incorporating monomers with X-ray visible iodine-motifs and MRI visible monomers with gadolinium content. Physical and thermomechanical characterization showed the effect of increased gadopentetic acid (GPA) on shape memory behavior. Multiple compositions showed brightening effects in pilot, T1-weighted MR imaging. There was a correlation between the polymeric density and X-ray visibility on expanded and compressed SMP foams. Additionally, extractions and indirect cytocompatibility studies were performed to address toxicity concerns of gadolinium-based contrast agents (GBCAs). This material platform has the potential to be used in a variety of medical devices.

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

Mission BION-M1: Results of RIBES/FOAM2 experiment on shape memory polymer foams and composites

2015 ◽  
Vol 40 ◽  
pp. 109-114 ◽  
Author(s):  
Loredana Santo ◽  
Fabrizio Quadrini ◽  
Pier Luigi Ganga ◽  
Valfredo Zolesi
Keyword(s):  
Shape Memory ◽  
Shape Memory Polymer ◽  
Polymer Foams

Shape memory polymer foams for cerebral aneurysm reparation: Effects of plasma sterilization on physical properties and cytocompatibility

2009 ◽  
Vol 5 (5) ◽  
pp. 1508-1518 ◽  
Author(s):  
Luigi De Nardo ◽  
Rachele Alberti ◽  
Alberto Cigada ◽  
L’Hocine Yahia ◽  
Maria Cristina Tanzi ◽  
...  
Keyword(s):  
Physical Properties ◽  
Shape Memory ◽  
Cerebral Aneurysm ◽  
Shape Memory Polymer ◽  
Polymer Foams ◽  
Plasma Sterilization

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.

Refractive X-ray shape memory polymer 3D lenses with axial symmetry

2012 ◽  
Vol 41 (5) ◽  
pp. 313-315 ◽  
Author(s):  
G. Pavlov ◽  
I. Snigireva ◽  
A. Snigirev ◽  
T. Sagdullin ◽  
M. Schmidt
Keyword(s):  
Shape Memory ◽  
Axial Symmetry ◽  
Shape Memory Polymer ◽  
X Ray

Synthesis and Characterization of Radiopaque Shape Memory Polymers

2017 ◽  
Author(s):  
Kendal Ezell ◽  
Landon Nash ◽  
Sonya Gordon ◽  
Duncan Maitland
Keyword(s):  
Shape Memory ◽  
Shape Memory Polymer ◽  
The United States ◽  
Endovascular Embolization ◽  
Polymer Foam ◽  
X Ray ◽  
Unruptured Cerebral Aneurysm ◽  
Composite Foams ◽  
Function Impairment

An estimated 6 million people in the United States have an unruptured cerebral aneurysm [1]. If left untreated, these aneurysms can rupture and to lead to severe brain function impairment or even death. Shape memory polymer (SMP) foams have been proposed for use to optimize endovascular embolization in place of current embolization devices [2,3]. SMPs are capable of actuating from a programmed secondary geometry to their expanded primary geometry in response to a stimulus, such as body temperature [4]. The expanded foam geometry provides an interface for embolization of the aneurysm to occur, however, treatment with these devices has limited visibility under fluoroscopy. Previous work by Hasan et al. increased radiopacity through the incorporation of tungsten (W) nanoparticles. These composite foams showed successful x-ray visibility, but aggregate disruption of the SMP matrix led to decreased mechanical properties [5]. This work addresses limitations of composite SMP foams, namely toughness, by chemically incorporating x-ray visible monomers, such as the triodobenzene containing monomer, 5-Amino-2,4,6-triiodoisophthalic acid (AT), into the material composition. These materials enable contrast agent loading without disrupting the polymer matrix. This polymer foam system was characterized to determine the clinical relevance of the improved radiopaque SMP foam for occlusion devices.

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