SHAPE MEMORY EFFECT AND PIEZOELECTRIC EFFECT
OF POLYMER COMPOSITE MATERIALS BASED ON POLYLACTIDE FOR ADAPTIVE MEDICAL STRUCTURES

The activation parameters of the Shape memory effect of polylactide were reduced by creating a polymer-polymer composite material based on it. The improved material was used to obtain porous scaffolds by electro-spinning, the shape memory effect and the piezoelectric effect were studied for these scaffolds.

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Polymer Composite Materials Based on Polylactide with a Shape Memory Effect for “Self-Fitting” Bone Implants

Polymers ◽

10.3390/polym13142367 ◽

2021 ◽

Vol 13 (14) ◽

pp. 2367

Author(s):

P. A. Zhukova ◽

F. S. Senatov ◽

M. Yu. Zadorozhnyy ◽

N. S. Chmelyuk ◽

V. A. Zaharova

Keyword(s):

Mechanical Properties ◽

Activation Energy ◽

Composite Materials ◽

Shape Memory ◽

Shape Memory Effect ◽

Memory Effect ◽

Polymer Composite ◽

Polymer Composite Materials ◽

Compression Tests ◽

Effective Use

The development of adaptive medical structures is one of the promising areas of bioengineering. Polymer composite materials based on polylactide (PLA) are interesting not only for their properties, such as biocompatibility, mechanical properties, biodegradation, and convenience of use, but also for demonstrating shape memory effect (SME). In this study, reducing the activation initiation temperature and the SME activation energy was achieved by forming a composite based on PLA containing 10% poly (ε -caprolactone) (PCL). The effect of the plasticizer on the structure, mechanical properties, and especially SME of the composite, was studied by DSC, SEM, FTIR spectroscopy, compression tests, and DMA. By varying the composition, the beginning of the SME activation was reached at 45 °C, and the apparent activation energy of the process decreased by 85 kJ/mol, ensuring safe and effective use of the material as a precursor for temporary self-fitting scaffolds for reconstructive surgery.

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Functional Metal-Polymer Composite Materials with Reversible Shape Memory Effect for Aeronautical and Space Structures

Russian Aeronautics ◽

10.3103/s1068799820040224 ◽

2020 ◽

Vol 63 (4) ◽

pp. 730-738

Author(s):

M. Yu. Kollerov ◽

E. A. Lukina ◽

D. E. Gusev ◽

R. E. Vinogradov

Keyword(s):

Composite Materials ◽

Shape Memory ◽

Shape Memory Effect ◽

Memory Effect ◽

Polymer Composite ◽

Polymer Composite Materials ◽

Space Structures ◽

Metal Polymer

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

Archives of Metallurgy and Materials ◽

10.1515/amm-2017-0210 ◽

2017 ◽

Vol 62 (2) ◽

pp. 1367-1370 ◽

Cited By ~ 1

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.

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CONCEPTUAL DESIGN OF THE WING OR FUSELAGE STRUCTURE OF A MAINLINE AIRCRAFT MADE OF METAL-POLYMER COMPOSITE MATERIALS

10.15593/2224-9982/2021.64.08 ◽

2021 ◽

pp. 74-82

Author(s):

Valery Pechenyuk ◽

◽

Yuri Popov ◽

Keyword(s):

Composite Material ◽

Composite Materials ◽

Polymer Composite ◽

Polymer Composite Material ◽

Polymer Composite Materials ◽

Design Stage ◽

Aluminum Sheets ◽

Preliminary Design Stage ◽

Modified Formula ◽

Metal Polymer

The analysis of existing aircraft structures made of metal-polymer composite materials is carried out, and a list of them with passport characteristics is compiled. The Fokker F-27 Friendship, Boeing-777 and Airbus A380, which use ARALL and GLARE materials, were selected as the aircraft under study. Formulas are determined and the distribution of normal force flows between metal and composite elements in the composition of MPCM based on aluminum sheets (aluminum-fiberglass – SIAL- 1-1, SIAL-3-1 and SIAL-1441 (9/8)) and titanium alloys (samples of titanium-carbon fiber from the patent-Example 1 and Example 3). To determine these parameters, the formulas used for a composite structure made of different materials are used. On the basis of the specification known MPCM the modified formula mixture rule for calculating the strength of new materials with a given set of orientation angles of PCM and the presence of layers of sheet metal, a comparison with standard mechanical characteristics and to show the efficiency of these formulas. Using these formulas, you can determine the strength characteristics for an arbitrary composition of the MPCM package. The features of the choice of design permissible stresses for the design of the airframe of a mainline aircraft made of metal-polymer composite material are highlighted. The concept of designing aircraft airframe elements using MPCM is considered. The results of this work will allow us to determine the rational components of the metal-polymer composite material and the structure of their distribution in the airframe design at the preliminary design stage.

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Development of Forming Method of Deployable Boom from Thermoplastic Polymer Composite

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.887.105 ◽

2021 ◽

Vol 887 ◽

pp. 105-109

Author(s):

A.M. Iuvshin ◽

Y.S. Andreev ◽

S.D. Tretyakov

Keyword(s):

Composite Material ◽

Composite Materials ◽

Polymer Composite ◽

Manufacturing Process ◽

Polymer Composite Material ◽

Polymer Composite Materials ◽

Thermoplastic Polymer ◽

Labour Intensity ◽

Thermoset Polymer ◽

Length Limitation

This paper studies deployable elements which are used in satellites and different terrestrial antenna devices. Many deployable elements are made from steel or thermoset polymer composite materials and have the following disadvantages like length limitation of deployable elements, labour intensity of manufacturing process of deployable elements etc. For this purpose a deployable tube boom element was chosen and a forming method for manufacturing deployable tube element from thermoplastic polymer composite material was developed.

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Chitosan scaffolds with a shape memory effect induced by hydration

Journal of Materials Chemistry B ◽

10.1039/c4tb00226a ◽

2014 ◽

Vol 2 (21) ◽

pp. 3315-3323 ◽

Cited By ~ 23

Author(s):

Cristina O. Correia ◽

João F. Mano

Keyword(s):

Minimally Invasive Surgery ◽

Minimally Invasive ◽

Shape Memory ◽

Shape Memory Effect ◽

Memory Effect ◽

Invasive Surgery ◽

Porous Scaffolds ◽

Chitosan Scaffolds

Chitosan-based porous scaffolds exhibit a shape memory effect triggered by hydration, and they are candidates for applications in minimally invasive surgery.

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Mechanical Properties of GFR & Graphite Epoxy Polymer Composites

Volume 5 - 2020, Issue 9 - September - International Journal of Innovative Science and Research Technology ◽

10.38124/ijisrt20jun277 ◽

2020 ◽

Vol 5 (6) ◽

pp. 560-565

Author(s):

A. Aakash ◽

S. Selvaraj

Keyword(s):

Mechanical Properties ◽

Composite Material ◽

Composite Materials ◽

Polymer Composite ◽

Epoxy Polymer ◽

Significant Degree ◽

Polymer Composite Material ◽

Water Ingestion ◽

Selection Of

Composite materials have the great potential and widely used as building material in numerous applications. Polymer composite material obtains the necessary properties in a controlled significant degree by the selection of strands and lattice. The properties of the materials have been selected by choosing the correct proportion of matrix and reinforcements. To build the quality of the material by expanding the fiber substance of the material. In this current examination, the mechanical properties of the glass fiber and graphite is strengthened with epoxy polymer composite were considered. Here the open embellishment method was received for the manufacture of the polymer composite The mechanical properties, for example, rigidity, compression quality, sway quality and water ingestion test was resolved according to the ASTM norms. The mechanical properties were improved as the filaments support content expanded in the grid material.

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Research of Vegetable Silicon Dioxide as a Filler for Polymer Composite Material

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.899.202 ◽

2021 ◽

Vol 899 ◽

pp. 202-207

Author(s):

Dina I. Fazylova ◽

Lyubov A. Zenitova

Keyword(s):

Molecular Weight ◽

Composite Material ◽

Composite Materials ◽

Silicon Dioxide ◽

Polymer Composite ◽

Rice Husk ◽

Silicone Rubber ◽

Polymer Composite Material ◽

Low Molecular Weight ◽

Impression Materials

Polymer composite materials based on low molecular weight silicone rubber SKTN-D have been developed, which are supposed to be used as impression materials in dentistry. Vegetable silicon dioxide obtained from rice husk waste was studied as a filler.

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