Department of Nature Sciences, Mathematics and Education, Federal University of São Carlos, Araras, São Paulo, 13600-970, Brazil.
Department of Physics, Chemistry, and Mathematics, Federal University of São Carlos, Sorocaba, São Paulo, 18052-780, Brazil.
Mikrochim Acta. 2022 Oct 10;189(11):414. doi: 10.1007/s00604-022-05511-2.
The development of a homemade carbon black composite filament with polylactic acid (CB-PLA) is reported. Optimized filaments containing 28.5% wt. of carbon black were obtained and employed in the 3D printing of improved electrochemical sensors by fused deposition modeling (FDM) technique. The fabricated filaments were used to construct a simple electrochemical system, which was explored for detecting catechol and hydroquinone in water samples and detecting hydrogen peroxide in milk. The determination of catechol and hydroquinone was successfully performed by differential pulse voltammetry, presenting LOD values of 0.02 and 0.22 µmol L, respectively, and recovery values ranging from 91.1 to 112% in tap water. Furthermore, the modification of CB-PLA electrodes with Prussian blue allowed the non-enzymatic amperometric detection of hydrogen peroxide at 0.0 V (vs. carbon black reference electrode) in milk samples, with a linear range between 5.0 and 350.0 mol L and low limit of detection (1.03 µmol L). Thus, CB-PLA can be successfully applied as additively manufactured electrochemical sensors, and the easy filament manufacturing process allows for its exploration in a diversity of applications.
本文报道了一种具有聚乳酸（CB-PLA）的自制碳黑复合材料长丝的开发。优化后的长丝含有 28.5%wt 的碳黑，并通过熔融沉积建模（FDM）技术用于 3D 打印改进型电化学传感器。所制备的长丝用于构建一个简单的电化学系统，该系统用于检测水样中的儿茶酚和对苯二酚以及牛奶中的过氧化氢。通过差分脉冲伏安法成功地测定了儿茶酚和对苯二酚，其检测限分别为 0.02 和 0.22 μmol L，在自来水中的回收率值在 91.1%至 112%之间。此外，通过普鲁士蓝对 CB-PLA 电极进行修饰，允许在牛奶样品中在 0.0 V（相对于碳黑参比电极）下对过氧化氢进行非酶安培检测，线性范围在 5.0 和 350.0 μmol L 之间，检测限低（1.03 μmol L）。因此，CB-PLA 可以成功地用作增材制造的电化学传感器，并且易于制造长丝的过程允许其在各种应用中进行探索。
