Preprinting Saponification of Carbon Thermoplastic Filaments Provides Ready-to-Use Electrochemical Sensors
Preprinting Saponification of Carbon Thermoplastic Filaments Provides Ready-to-Use Electrochemical Sensors
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DOI：
10.1021/acsaelm.3c00862
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发表时间：
2023-08-25
影响因子：
4.7
通讯作者：
Patel, Bhavik Anil
中科院分区：
文献类型：
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作者：
Shergill, Ricoveer Singh;Patel, Bhavik Anil
碳基电极已经在广泛的应用中产生了影响；然而，电化学性能和易于制造之间的平衡仍然是一个主要的挑战。三维（3D）打印已经成为一种很有前途的解决方案，可以提供高通量、易于生产的精确碳基电化学传感器，但用商业长丝打印的电极可能表现出较差或没有电化学性能。人们采用了不同的策略来克服这些挑战，取得了不同程度的成功。我们的研究重点是系统地使用氢氧化物皂化法选择性地去除市售碳热塑性长丝预印中的聚乳酸（PLA）。采用不同氧化还原探针的循环伏安法研究了多壁碳纳米管(MWCNT)/PLA电极与由天然和改性长丝制成的炭黑(CB)/PLA电极之间的差异。随着时间的增加，长丝皂化后电阻率降低，在MWCNT/PLA长丝中观察到表面变化。用改性长丝制备的CB/PLA和MWCNT/PLA电极比用天然长丝制备的电极具有更大的电流响应和更快的电子传递动力学。改性长丝制备的CB/PLA电极与用天然长丝制备的电化学处理的CB/PLA电极相比，也表现出更高的电化学性能。本文报道的预印皂化碳PLA长丝为制造高性能即用型3D打印电化学传感器提供了一种新方法，在传感和储能领域具有广泛的应用价值。
Carbon-based electrodes have been impactful in a wide array of applications; however, the balance between electrochemical performance and ease of fabrication is still a major challenge. Three-dimensional (3D) printing has emerged as a promising solution to provide high-throughput easy production of precise carbon-based electrochemical sensors, but the printed electrodes from commercial filaments can exhibit poor or no electrochemical performance. Varying strategies have been utilized to overcome these challenges with different levels of success. Our study focuses on the systematic use of saponification using hydroxide to selectively remove polylactic acid (PLA) from the commercially available carbon thermoplastic filament preprinting. Cyclic voltammetry of varying redox probes was used to access the difference between multiwalled carbon nanotube (MWCNT)/PLA and carbon black (CB)/PLA electrodes made with native and modified filament. Resistivity was reduced following saponification of filaments over increasing time, where surface changes were observed in the MWCNT/PLA filaments. CB/PLA and MWCNT/PLA electrodes made by using modified filaments had greater current responses and faster electron transfer kinetics than electrodes made with the native filament. Modified filament-made CB/PLA electrodes also exhibited greater electrochemical performance when compared to electrochemically treated CB/PLA electrodes made with the native filament. The preprinting saponification of the carbon PLA filament reported here provides a novel approach for fabricating high-performance ready-to-use 3D printed electrochemical sensors with utility in applications ranging in sensing and energy storage.