4D Printing of Magnetic Shape Memory Polymer—La0.7Sr0.3MnO3 Nanocomposite

IF 3.4 3区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Mohammad H. Yousuf, Wael Abuzaid, Mehmet Egilmez
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引用次数: 0

Abstract

Four-dimensional printing has revolutionized traditional three-dimensional printing (3D printing) by using smart materials such as shape memory polymers (SMPs). As nonmagnetic materials, SMPs require direct exposure to heat for the shape memory effect to be triggered. This limitation can be addressed by incorporating magnetic nanoparticles, allowing the SMP/nanocomposite to be remotely heated through induction heating. This work focuses on the La 1 x Sr x MnO 3 $\left(\text{La}\right)_{1 - x} \left(\text{Sr}\right)_{x} \left(\text{MnO}\right)_{3}$ (LSMO) manganite with an optimized stoichiometry of x = 0.3. Polycrystalline LSMO is sintered from pure powders and later added to SMP through the solution mixing route, and finally extruded into filaments to be used for 3D printing. Significant improvements in the elastic modulus, yield, and ultimate strengths are observed following LSMO addition. All the composites exhibit magnetic moments near 3.5 μB Mn−1 at the ground state indicating desirable magnetic properties. Shape memory properties are evaluated following the application of programming and recovery cycles on the as-printed single-cell auxetic structure. The evaluation of the bulk strain on the auxetic structure for 0 and 20 wt% LSMO/SMP nanocomposite reveals no change in shape fixity, a slight decrease in shape recovery ratio from 88 to 81%, and a significant improvement in the shape recovery rate from 124.3 to 179.5% min−1.

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来源期刊
Advanced Engineering Materials
Advanced Engineering Materials 工程技术-材料科学:综合
CiteScore
5.70
自引率
5.60%
发文量
544
审稿时长
1.7 months
期刊介绍: Advanced Engineering Materials is the membership journal of three leading European Materials Societies - German Materials Society/DGM, - French Materials Society/SF2M, - Swiss Materials Federation/SVMT.
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