Probing effect of counterions on electric field stimuli responsive behaviours of smart organoboron-based polyelectrolytes

IF 4.5 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers Pub Date : 2024-05-25 DOI:10.1016/j.reactfunctpolym.2024.105947

Gokce Calis-Ismetoglu , Sevki Can Cevher , Halil Ibrahim Unal

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Abstract

This is the first study to be introduced to the electrorheology (ER) literature focusing on organoboron-based polyelectrolyte colloidal systems namely: polymeric lithium tartaric acid borate (Poly-LiTB) and polymeric sodium tartaric acid borate (Poly-NaTB). Syntheses of functional polyelectrolytes were monitored via ¹H-NMR, ATR-FTIR and SEM-EDX analyses. Electrical conductivity measurements indicated that Poly-LiTB and Poly-NaTB were in semi-conductive region indicating potential smart ER behaviour. A higher polarizability was detected for 20 wt.% Poly-LiTB dispersions in silicone oil (SO) by dielectric measurements. As expected, improved ER performances were obtained for Poly-LiTB/SO colloidal dispersion (τ_y = 265 Pa, ER_eff = 87, G′ = 80 kPa at 10 Hz, τ_c = 98 Pa, recovery% = 68) compared to Poly-NaTB/SO colloidal dispersion (τ_y = 195 Pa, ER_eff = 38, G′ = 42 kPa at 10 Hz, τ_c = 42 Pa, recovery% = 67). To sum up, it was determined that the best ER activity was detected by the organoboron-based polyelectrolyte containing Li⁺ counterion with smaller ionic radius and higher ionic mobility when their physicochemical properties are taken into account.

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探究反离子对智能有机硼基聚电解质电场刺激响应行为的影响

这是首次在电流变学（ER）文献中介绍以有机硼为基础的聚电解质胶体系统，即聚合物酒石酸硼酸锂（Poly-LiTB）和聚合物酒石酸硼酸钠（Poly-NaTB）。通过 1H-NMR、ATR-FTIR 和 SEM-EDX 分析监测了功能性聚电解质的合成。电导率测量结果表明，Poly-LiTB 和 Poly-NaTB 处于半导电区域，这表明它们具有潜在的智能 ER 性能。通过介电测量发现，硅油（SO）中 20 wt.% 的 Poly-LiTB 分散体具有更高的极化性。正如预期的那样，与 Poly-NaTB/SO 胶体分散体（τy = 195 Pa，EReff = 38，10 Hz 时 G′ = 42 kPa，τc = 42 Pa，回收率 = 67）相比，Poly-LiTB/SO 胶体分散体获得了更好的 ER 性能（τy = 265 Pa，EReff = 87，10 Hz 时 G′ = 80 kPa，τc = 98 Pa，回收率 = 68）。综上所述，如果考虑到含有 Li+ 反离子的有机硼基聚电解质的理化特性，则可以确定其离子半径较小、离子迁移率较高的有机硼基聚电解质检测到的ER活性最好。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Reactive & Functional Polymers 工程技术-高分子科学

CiteScore

8.90

自引率

5.90%

发文量

259

审稿时长

27 days

期刊介绍： Reactive & Functional Polymers provides a forum to disseminate original ideas, concepts and developments in the science and technology of polymers with functional groups, which impart specific chemical reactivity or physical, chemical, structural, biological, and pharmacological functionality. The scope covers organic polymers, acting for instance as reagents, catalysts, templates, ion-exchangers, selective sorbents, chelating or antimicrobial agents, drug carriers, sensors, membranes, and hydrogels. This also includes reactive cross-linkable prepolymers and high-performance thermosetting polymers, natural or degradable polymers, conducting polymers, and porous polymers. Original research articles must contain thorough molecular and material characterization data on synthesis of the above polymers in combination with their applications. Applications include but are not limited to catalysis, water or effluent treatment, separations and recovery, electronics and information storage, energy conversion, encapsulation, or adhesion.