Emulsion Electrospinning of Polytetrafluoroethylene (PTFE) Nanofibrous Membranes for High-Performance Triboelectric Nanogenerators

Pengfei Zhao, Navneet Soin, Kovur Prashanthi, Jinkai Chen, Shurong Dong, Erping Zhou, Zhigang Zhu, Anand Arcot Narasimulu, Carlo D. Montemagno, Liyang Yu, Jikui Luo

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Electrospinning is a simple, versatile technique for fabricating fibrous nanomaterials with the desirable features of extremely high porosities and large surface areas. Using emulsion electrospinning, polytetrafluoroethylene/polyethene oxide (PTFE/PEO) membranes were fabricated, followed by a sintering process to obtain pure PTFE fibrous membranes, which were further utilized against a polyamide 6 (PA6) membrane for vertical contact-mode triboelectric nanogenerators (TENGs). Electrostatic force microscopy (EFM) measurements of the sintered electrospun PTFE membranes revealed the presence of both positive and negative surface charges owing to the transfer of positive charge from PEO which was further corroborated by FTIR measurements. To enhance the ensuing triboelectric surface charge, a facile negative charge-injection process was carried out onto the electrospun (ES) PTFE subsequently. The fabricated TENG gave a stabilized peak-to-peak open-circuit voltage (V oc ) of up to ∼900 V, a short-circuit current density (J sc ) of ∼20 mA m -2 , and a corresponding charge density of ∼149 μC m -2 , which are ∼12, 14, and 11 times higher than the corresponding values prior to the ion-injection treatment. This increase in the surface charge density is caused by the inversion of positive surface charges with the simultaneous increase in the negative surface charge on the PTFE surface, which was confirmed by using EFM measurements. The negative charge injection led to an enhanced power output density of ∼9 W m -2 with high stability as confirmed from the continuous operation of the ion-injected PTFE/PA6 TENG for 30 000 operation cycles, without any significant reduction in the output. The work thus introduces a relatively simple, cost-effective, and environmentally friendly technique for fabricating fibrous fluoropolymer polymer membranes with high thermal/chemical resistance in TENG field and a direct ion-injection method which is able to dramatically improve the surface negative charge density of the PTFE fibrous membranes.

LanguageEnglish
Pages5880-5891
Number of pages12
JournalACS Applied Materials and Interfaces
Volume10
Issue number6
DOIs
Publication statusPublished - 18 Jan 2018

Fingerprint

Polytetrafluoroethylene
Electrospinning
Emulsions
Polytetrafluoroethylenes
Surface charge
Membranes
Fibrous membranes
Charge density
Charge injection
Electrostatic force
Ions
Polyamides
Microscopic examination
Fluorine containing polymers
Chemical resistance
Open circuit voltage
Polyethylene oxides
Nanostructured materials
Short circuit currents
Oxides

Keywords

  • electrostatic force microscopy (EFM)
  • emulsion electrospinning
  • ion injection
  • PEO carrier
  • PTFE nanofiber
  • triboelectric nanogenerator

Cite this

Zhao, Pengfei ; Soin, Navneet ; Prashanthi, Kovur ; Chen, Jinkai ; Dong, Shurong ; Zhou, Erping ; Zhu, Zhigang ; Narasimulu, Anand Arcot ; Montemagno, Carlo D. ; Yu, Liyang ; Luo, Jikui. / Emulsion Electrospinning of Polytetrafluoroethylene (PTFE) Nanofibrous Membranes for High-Performance Triboelectric Nanogenerators. In: ACS Applied Materials and Interfaces. 2018 ; Vol. 10, No. 6. pp. 5880-5891.
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abstract = "Electrospinning is a simple, versatile technique for fabricating fibrous nanomaterials with the desirable features of extremely high porosities and large surface areas. Using emulsion electrospinning, polytetrafluoroethylene/polyethene oxide (PTFE/PEO) membranes were fabricated, followed by a sintering process to obtain pure PTFE fibrous membranes, which were further utilized against a polyamide 6 (PA6) membrane for vertical contact-mode triboelectric nanogenerators (TENGs). Electrostatic force microscopy (EFM) measurements of the sintered electrospun PTFE membranes revealed the presence of both positive and negative surface charges owing to the transfer of positive charge from PEO which was further corroborated by FTIR measurements. To enhance the ensuing triboelectric surface charge, a facile negative charge-injection process was carried out onto the electrospun (ES) PTFE subsequently. The fabricated TENG gave a stabilized peak-to-peak open-circuit voltage (V oc ) of up to ∼900 V, a short-circuit current density (J sc ) of ∼20 mA m -2 , and a corresponding charge density of ∼149 μC m -2 , which are ∼12, 14, and 11 times higher than the corresponding values prior to the ion-injection treatment. This increase in the surface charge density is caused by the inversion of positive surface charges with the simultaneous increase in the negative surface charge on the PTFE surface, which was confirmed by using EFM measurements. The negative charge injection led to an enhanced power output density of ∼9 W m -2 with high stability as confirmed from the continuous operation of the ion-injected PTFE/PA6 TENG for 30 000 operation cycles, without any significant reduction in the output. The work thus introduces a relatively simple, cost-effective, and environmentally friendly technique for fabricating fibrous fluoropolymer polymer membranes with high thermal/chemical resistance in TENG field and a direct ion-injection method which is able to dramatically improve the surface negative charge density of the PTFE fibrous membranes.",
keywords = "electrostatic force microscopy (EFM), emulsion electrospinning, ion injection, PEO carrier, PTFE nanofiber, triboelectric nanogenerator",
author = "Pengfei Zhao and Navneet Soin and Kovur Prashanthi and Jinkai Chen and Shurong Dong and Erping Zhou and Zhigang Zhu and Narasimulu, {Anand Arcot} and Montemagno, {Carlo D.} and Liyang Yu and Jikui Luo",
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Zhao, P, Soin, N, Prashanthi, K, Chen, J, Dong, S, Zhou, E, Zhu, Z, Narasimulu, AA, Montemagno, CD, Yu, L & Luo, J 2018, 'Emulsion Electrospinning of Polytetrafluoroethylene (PTFE) Nanofibrous Membranes for High-Performance Triboelectric Nanogenerators', ACS Applied Materials and Interfaces, vol. 10, no. 6, pp. 5880-5891. https://doi.org/10.1021/acsami.7b18442

Emulsion Electrospinning of Polytetrafluoroethylene (PTFE) Nanofibrous Membranes for High-Performance Triboelectric Nanogenerators. / Zhao, Pengfei; Soin, Navneet; Prashanthi, Kovur; Chen, Jinkai; Dong, Shurong; Zhou, Erping; Zhu, Zhigang; Narasimulu, Anand Arcot; Montemagno, Carlo D.; Yu, Liyang; Luo, Jikui.

In: ACS Applied Materials and Interfaces, Vol. 10, No. 6, 18.01.2018, p. 5880-5891.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Emulsion Electrospinning of Polytetrafluoroethylene (PTFE) Nanofibrous Membranes for High-Performance Triboelectric Nanogenerators

AU - Zhao, Pengfei

AU - Soin, Navneet

AU - Prashanthi, Kovur

AU - Chen, Jinkai

AU - Dong, Shurong

AU - Zhou, Erping

AU - Zhu, Zhigang

AU - Narasimulu, Anand Arcot

AU - Montemagno, Carlo D.

AU - Yu, Liyang

AU - Luo, Jikui

N1 - Deposited in University of Bolton Repository 18 Feb 2018 - Exception to be applied.

PY - 2018/1/18

Y1 - 2018/1/18

N2 - Electrospinning is a simple, versatile technique for fabricating fibrous nanomaterials with the desirable features of extremely high porosities and large surface areas. Using emulsion electrospinning, polytetrafluoroethylene/polyethene oxide (PTFE/PEO) membranes were fabricated, followed by a sintering process to obtain pure PTFE fibrous membranes, which were further utilized against a polyamide 6 (PA6) membrane for vertical contact-mode triboelectric nanogenerators (TENGs). Electrostatic force microscopy (EFM) measurements of the sintered electrospun PTFE membranes revealed the presence of both positive and negative surface charges owing to the transfer of positive charge from PEO which was further corroborated by FTIR measurements. To enhance the ensuing triboelectric surface charge, a facile negative charge-injection process was carried out onto the electrospun (ES) PTFE subsequently. The fabricated TENG gave a stabilized peak-to-peak open-circuit voltage (V oc ) of up to ∼900 V, a short-circuit current density (J sc ) of ∼20 mA m -2 , and a corresponding charge density of ∼149 μC m -2 , which are ∼12, 14, and 11 times higher than the corresponding values prior to the ion-injection treatment. This increase in the surface charge density is caused by the inversion of positive surface charges with the simultaneous increase in the negative surface charge on the PTFE surface, which was confirmed by using EFM measurements. The negative charge injection led to an enhanced power output density of ∼9 W m -2 with high stability as confirmed from the continuous operation of the ion-injected PTFE/PA6 TENG for 30 000 operation cycles, without any significant reduction in the output. The work thus introduces a relatively simple, cost-effective, and environmentally friendly technique for fabricating fibrous fluoropolymer polymer membranes with high thermal/chemical resistance in TENG field and a direct ion-injection method which is able to dramatically improve the surface negative charge density of the PTFE fibrous membranes.

AB - Electrospinning is a simple, versatile technique for fabricating fibrous nanomaterials with the desirable features of extremely high porosities and large surface areas. Using emulsion electrospinning, polytetrafluoroethylene/polyethene oxide (PTFE/PEO) membranes were fabricated, followed by a sintering process to obtain pure PTFE fibrous membranes, which were further utilized against a polyamide 6 (PA6) membrane for vertical contact-mode triboelectric nanogenerators (TENGs). Electrostatic force microscopy (EFM) measurements of the sintered electrospun PTFE membranes revealed the presence of both positive and negative surface charges owing to the transfer of positive charge from PEO which was further corroborated by FTIR measurements. To enhance the ensuing triboelectric surface charge, a facile negative charge-injection process was carried out onto the electrospun (ES) PTFE subsequently. The fabricated TENG gave a stabilized peak-to-peak open-circuit voltage (V oc ) of up to ∼900 V, a short-circuit current density (J sc ) of ∼20 mA m -2 , and a corresponding charge density of ∼149 μC m -2 , which are ∼12, 14, and 11 times higher than the corresponding values prior to the ion-injection treatment. This increase in the surface charge density is caused by the inversion of positive surface charges with the simultaneous increase in the negative surface charge on the PTFE surface, which was confirmed by using EFM measurements. The negative charge injection led to an enhanced power output density of ∼9 W m -2 with high stability as confirmed from the continuous operation of the ion-injected PTFE/PA6 TENG for 30 000 operation cycles, without any significant reduction in the output. The work thus introduces a relatively simple, cost-effective, and environmentally friendly technique for fabricating fibrous fluoropolymer polymer membranes with high thermal/chemical resistance in TENG field and a direct ion-injection method which is able to dramatically improve the surface negative charge density of the PTFE fibrous membranes.

KW - electrostatic force microscopy (EFM)

KW - emulsion electrospinning

KW - ion injection

KW - PEO carrier

KW - PTFE nanofiber

KW - triboelectric nanogenerator

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U2 - 10.1021/acsami.7b18442

DO - 10.1021/acsami.7b18442

M3 - Article

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EP - 5891

JO - ACS Applied Materials and Interfaces

T2 - ACS Applied Materials and Interfaces

JF - ACS Applied Materials and Interfaces

SN - 1944-8244

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