Effects of dual plasticizers for improved PVC gel-based varifocal tiny lens

Gouri Tudu; Eun-Jin Jung; Yong Hae Heo; Sang-Youn Kim

doi:10.1088/1361-665x/ad9713

journal article Dec 05, 2024

Effects of dual plasticizers for improved PVC gel-based varifocal tiny lens

Gouri Tudu

Eun-Jin Jung

Yong Hae Heo

Sang-Youn Kim

Smart Materials and Structures Vol. 34 No. 1 pp. 015009 · IOP Publishing

View at Publisher Save 10.1088/1361-665x/ad9713

Abstract

Abstract
Electroactive polyvinyl chloride (PVC) gel-based varifocal lenses are attractive due to their excellent transparency, simple fabrication, compact structure, and good flexibility. In this work, dibutyl adipate (DBA) and propylene carbonate (PC) were utilized to plasticize PVC for fabricating transparent, soft, and flexible gels by solvent casting method. The PVC gels were characterized by various experimental techniques to investigate their optical, electrical, mechanical, and thermal properties. Further, the PVC gels were examined to construct a compact plano-convex tiny lens structure for varifocal lens application under electrical stimulation. The work revealed that the introduction of a co-plasticizer PC improves the overall dielectric property as well as transparency of the PVC gels. The observed enhancement in dielectric constant of the PC incorporated gels increased up to 6 times of the only DBA plasticized PVC gel (D9) while the transmittance value is ∼5% higher than that of D9 gel. Moreover, the optimal ratio of DBA and PC in PVC gel was found to be 8.6:0.4:1 (wt%) and the optimized D8.6P0.4 gel induces better actuation properties resulting in improved focal length variation for the developed lens. The proposed adaptive tiny lens could change its focal length from 3 mm to 20.5 mm with increasing input voltage from 0 V to 1000 V. The developed tiny lens exhibited excellent optical characteristics including fast response speed and good stability. Moreover, this study broadens the scope for property tuning strategies for the electroactive polymer design and application.

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Details

Published: Dec 05, 2024
Vol/Issue: 34(1)
Pages: 015009
License: View

Authors

Funding

National Research Foundation of Korea Award: RS-2023-00245538

Cite This Article

Gouri Tudu, Eun-Jin Jung, Yong Hae Heo, et al. (2024). Effects of dual plasticizers for improved PVC gel-based varifocal tiny lens. Smart Materials and Structures, 34(1), 015009. https://doi.org/10.1088/1361-665x/ad9713

Effects of dual plasticizers for improved PVC gel-based varifocal tiny lens

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