Safe and negligible-loss overcurrent protection: A novel macromolecular voltage stabilizer for conductive polymer composites

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology Pub Date : 2024-11-16 DOI:10.1016/j.compscitech.2024.110965

Xuhuang Chen , Jiaqi Gao , Yinghao Qi , Chuanchuan Dai , Zhaoxin Li , Yu Wu , Peng Yu , Siwen Bi

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Abstract

The balance between safety issues and low loads remains a major obstacle toward large-scale applications of conductive polymer composites (CPCs) based over-current protection. Elevating the conductive filler concentration in CPCs is a potential strategy to reduce initial resistivity for decreased load, but compromise positive temperature coefficient (PTC) performance and voltage breakdown strength. Here, a novel type of macromolecular voltage stabilizer is synthesized by fluorine rubber and ferrocene to optimize the comprehensive properties of CPCs with low resistivity. The voltage stabilizer provides CPCs with a high voltage breakdown strength of up to 54V with maintaining an extremely low initial resistivity. Such CPCs also have an enhanced PTC intensity, improved instability voltage threshold, suppressed NTC effect, and good reproducibility up on/off switching. Based on tunnel effect, these improved properties can be interpreted by the reduction of charge transfer impact on the degradation of the polymer matrix. This work suggests the great potential of using these unique additives and theoretical investigations for overcurrent protection or insulating material.

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安全且损耗可忽略不计的过流保护：用于导电聚合物复合材料的新型大分子稳压器

安全问题与低负载之间的平衡仍然是大规模应用基于过流保护的导电聚合物复合材料（CPC）的主要障碍。提高 CPC 中导电填料的浓度是降低初始电阻率以减少负载的潜在策略，但会影响正温度系数（PTC）性能和电压击穿强度。本文通过氟橡胶和二茂铁合成了一种新型高分子电压稳定剂，以优化低电阻率 CPC 的综合性能。这种电压稳定剂使 CPC 在保持极低初始电阻率的同时，还具有高达 54V 的高电压击穿强度。这种 CPC 还具有增强的 PTC 强度、改善的不稳定电压阈值、抑制的 NTC 效应以及良好的开关再现性。基于隧道效应，电荷转移对聚合物基质降解的影响减小，从而解释了这些改进的特性。这项研究表明，将这些独特的添加剂和理论研究用于过流保护或绝缘材料具有巨大的潜力。

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来源期刊

Composites Science and Technology 工程技术-材料科学：复合

CiteScore

16.20

自引率

9.90%

发文量

611

审稿时长

33 days

期刊介绍： Composites Science and Technology publishes refereed original articles on the fundamental and applied science of engineering composites. The focus of this journal is on polymeric matrix composites with reinforcements/fillers ranging from nano- to macro-scale. CSTE encourages manuscripts reporting unique, innovative contributions to the physics, chemistry, materials science and applied mechanics aspects of advanced composites. Besides traditional fiber reinforced composites, novel composites with significant potential for engineering applications are encouraged.