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The characterizations of electromechanical performances of the polydimethylsiloxane (pdms) based stretch sensor with high permittivity fillers / Nur Syafiqah Binti Ismail

By:

Nur Syafiqah Binti Ismail [author.]

Material type: Text

TextPublisher: Kuantan, Pahang : UMPSA, 2025Copyright date: ©Description: xiv , 67 pages : illustrations ; 30 cm. + 1 cd-romContent type:

text

Media type:

unmediated

Carrier type:

volume

ISBN:

THE0010378 (Local)

Subject(s):

Dissertation note: Thesis (Master of Science ) -- Universiti Malaysia Pahang - 2025 Abstract: The increasing need for flexible sensors in fields like robotics and wearables has drawn attention to dielectric elastomers (DEs), especially polydimethylsiloxane (PDMS), known for its stability and quick response. However, PDMS's naturally low dielectric permittivity limits its performance. This study explored enhancing PDMS films by adding both hard fillers (TiO2 and ZnO) and a soft filler (silicone oil), focusing on moisture control, filler compatibility, and long-term stability. Initially, the research found that calcining TiO2 and ZnO fillers to remove moisture significantly improved the breakdown strength of PDMS films. Films with 15 wt% calcined TiO2 achieved the highest breakdown strength at 130 V/μm. As TiO2 consistently outperformed ZnO, it was selected as hard filler for the subsequent parts of this study. Next, silicone oil was introduced to reduce the stiffness caused by hard fillers, and nonpolar fillers were used to boost moisture resistance. The best overall performance was seen with 3 wt% stearic-acid-modified TiO2, which delivered the highest breakdown strength and permittivity, resulting in an excellent Figure of Merit (FOM) of 3.57. Finally, to tackle the issue of silicone oil migrating to the PDMS surface, bacterial cellulose (BC) was used as a “glue” to contain the fillers. The combination of 15 wt% BC and 10 wt% silicone oil achieved an FOM of 1.58. In summary, adding these fillers effectively boosted the permittivity and electromechanical performance of PDMS films.

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Holdings ( 2 )
Title notes ( 4 )

Holdings
Item type	Current library	Call number	Status	Date due	Barcode
Thesis	UMPLIB GAMBANG	FIST .F57 2025 r Thesis (Browse shelf(Opens below))	Not for loan		T000004020
Thesis	UMPLIB GAMBANG	CD13922 (Browse shelf(Opens below))	In Transit		T000004021

Faculty of Industrial Sciences and Technology

Thesis (Master of Science ) -- Universiti Malaysia Pahang - 2025

Includes bibliographical references

The increasing need for flexible sensors in fields like robotics and wearables has drawn attention to dielectric elastomers (DEs), especially polydimethylsiloxane (PDMS), known for its stability and quick response. However, PDMS's naturally low dielectric permittivity limits its performance. This study explored enhancing PDMS films by adding both hard fillers (TiO2 and ZnO) and a soft filler (silicone oil), focusing on moisture control, filler compatibility, and long-term stability. Initially, the research found that calcining TiO2 and ZnO fillers to remove moisture significantly improved the breakdown strength of PDMS films. Films with 15 wt% calcined TiO2 achieved the highest breakdown strength at 130 V/μm. As TiO2 consistently outperformed ZnO, it was selected as hard filler for the subsequent parts of this study. Next, silicone oil was introduced to reduce the stiffness caused by hard fillers, and nonpolar fillers were used to boost moisture resistance. The best overall performance was seen with 3 wt% stearic-acid-modified TiO2, which delivered the highest breakdown strength and permittivity, resulting in an excellent Figure of Merit (FOM) of 3.57. Finally, to tackle the issue of silicone oil migrating to the PDMS surface, bacterial cellulose (BC) was used as a “glue” to contain the fillers. The combination of 15 wt% BC and 10 wt% silicone oil achieved an FOM of 1.58. In summary, adding these fillers effectively boosted the permittivity and electromechanical performance of PDMS films.