Improved Electromechanical Performance of Dielectric Elastomers via Constructing an All-Organic Composite Structure

IF 5.1 1区化学 Q1 POLYMER SCIENCE

Macromolecules Pub Date : 2025-06-18 DOI:10.1021/acs.macromol.5c00971

Chuying Zhang, Haotong Guo, Na Zhang, Liming Jin, Jinbo Bai, Hang Zhao

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Abstract

Dielectric elastomers (DEs) can be deformed in response to an electric field. However, an excellent electro-actuated strain of DEs is usually achieved at high applied voltages, which severely limits their application range. Moreover, flexible DEs are susceptible to electromechanical breakdown, which directly affects their operational life. Herein, a novel all-organic DE composite was designed. First, isooctyl 3-mercaptopropionate (IOMP)-grafted methyl vinyl silicone (MVQ) was prepared to enhance the polarization and reduce cross-link density of macromolecular chains. Furthermore, 1,4,5,8-naphthalenetetracarboxylic dianhydride (NTCDA) was incorporated into the MVQ–IOMP matrix. The positively charged NTCDA can capture free charges through strong electrostatic interaction, thus enhancing the breakdown strength of DEs. Ultimately, a 1 wt % NTCDA/MVQ–IOMP_0.75 DE composite obtains an extremal actuated strain of 52.9% under 45.2 V/μm and a maximum actuated strain of 37.3% under its safe electric field (36.1 V/μm). Consequently, this work provides a feasible way for preparing advanced DE composites.

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通过构建全有机复合材料结构改善介电弹性体机电性能

介电弹性体（DEs）在电场作用下会发生变形。然而，通常在高施加电压下才能获得良好的电致应变，这严重限制了其应用范围。此外，柔性DEs容易发生机电击穿，直接影响其使用寿命。本文设计了一种新型的全有机DE复合材料。首先，制备了3-巯基丙酸异辛酯（IOMP）接枝甲基乙烯基有机硅（MVQ），增强了大分子链的极化，降低了交联密度。将1,4,5,8-萘四羧酸二酐（NTCDA）掺入MVQ-IOMP基质中。结果表明，1 wt % NTCDA/ MVQ-IOMP0.75 DE复合材料在45.2 V/μm下的极限激活应变为52.9%，在安全电场（36.1 V/μm）下的最大激活应变为37.3%。因此，本工作为制备高级DE复合材料提供了可行的途径。

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来源期刊

Macromolecules 工程技术-高分子科学

CiteScore

9.30

自引率

16.40%

发文量

942

审稿时长

2 months

期刊介绍： Macromolecules publishes original, fundamental, and impactful research on all aspects of polymer science. Topics of interest include synthesis (e.g., controlled polymerizations, polymerization catalysis, post polymerization modification, new monomer structures and polymer architectures, and polymerization mechanisms/kinetics analysis); phase behavior, thermodynamics, dynamic, and ordering/disordering phenomena (e.g., self-assembly, gelation, crystallization, solution/melt/solid-state characteristics); structure and properties (e.g., mechanical and rheological properties, surface/interfacial characteristics, electronic and transport properties); new state of the art characterization (e.g., spectroscopy, scattering, microscopy, rheology), simulation (e.g., Monte Carlo, molecular dynamics, multi-scale/coarse-grained modeling), and theoretical methods. Renewable/sustainable polymers, polymer networks, responsive polymers, electro-, magneto- and opto-active macromolecules, inorganic polymers, charge-transporting polymers (ion-containing, semiconducting, and conducting), nanostructured polymers, and polymer composites are also of interest. Typical papers published in Macromolecules showcase important and innovative concepts, experimental methods/observations, and theoretical/computational approaches that demonstrate a fundamental advance in the understanding of polymers.