Effects of Fluorine-Based Modification on Triboelectric Properties of Cellulose

Abstract

The hydroxyl groups on the cellulose macromolecular chain cause the cellulose surface to have strong reactivity. In this study, 1H, 1H, 2H, 2H-perfluorodecyltriethoxysilane (PDOTES) was used to modify cellulose to improve its triboelectric properties, and a triboelectric nanogenerator (TENG) was assembled. The introduction of fluorine groups reduced the surface potential of cellulose and turned it into a negative phase, which enhanced the ability to capture electrons. The electrical properties increased by 30% compared with unmodified cellulose. According to the principles of TENGs, a self-powered human-wearable device was designed using PDOTES-paper, which could detect movements of the human body, such as walking and running, and facilitated a practical method for the preparation of efficient wearable sensors.

In Situ Growth of Nanoporous Covalent Organic Frameworks on Metal–Organic Framework Surfaces for Epoxy Coating Applications

“…As shown in Figure c, the XPS spectra of Cu-MOF@Im-COF exhibited peaks corresponding to Cu 2p, O 1s, N 1s, and C 1s . Meanwhile, in the XPS spectrum of Cu-MOF/G@Im-COF, additional peaks of Cu 2p, F 1s, O 1s, N 1s, C 1s, and Si 2p were observed, which can be attributed to the introduction of POTS . High-resolution C 1s spectra were fitted to further confirm the chemical structures of Cu-MOF@Im-COF and Cu-MOF/G@Im-COF.…”

Triboelectric nanogenerator assisted synthesis and detection of chemical compounds

“…Furthermore, different materials of a wide range of choices including metals, 13,60,75 polymers, 76 oxides, 77 and natural materials 78,79 can be used as triboelectric layers of the TENG to enhance the chemical synthesis and detection efficiency. All of these mentioned facts of TENGs can help to expand their application in the area of chemical synthesis and detection.…”

“…39 In addition, doping, dened as the addition of impurities to materials intentionally to control their properties, 74 can also be performed in the triboelectric layers to facilitate the adsorption process of chemicals. 39 Furthermore, different materials of a wide range of choices including metals, 13,60,75 polymers, 76 oxides, 77 and natural materials 78,79 can be used as triboelectric layers of the TENG to enhance the chemical synthesis and detection efficiency. All of these mentioned facts of TENGs can help to expand their application in the area of chemical synthesis and detection.…”

Toward Large-Scale Energy Harvesting by a UV-Curable Organic-Coating-Based Triboelectric Nanogenerator

“…To push the TENGs into practical applications, many research advances have been made to improve the output performance of the devices, including surface modification [ 28 , 29 ], structure optimization [ 30 , 31 ], ion injection [ 32 , 33 ], and intermediate layer implantation [ 34 , 35 ], expanding the fields of application to self-powered sensing, smart wearables, and implantable electronics [ 36 , 37 , 38 ]. Despite these advances, most devices need micro/nanostructures and/or complex and expensive instrumentation, making inexpensive and large-scale mass production difficult, which has ultimately limited their practical applications.…”