Abstract
Reconfigurable lens provides variable-focus in optics without any moving part. The material for a reconfigurable lens should be deformable in the presence of external stimuli meanwhile maintaining its optical transparency for the lens function. This article reports the fabrication and actuation property of the Poly(acrylic acid)-Poly(vinyl alcohol) (PAP) hydrogels for reconfigurable active lens. The PAP hydrogels were prepared by free radical and freeze-thaw technique using N,N1-methylenebisacrylamaide and potassium persulfate/N,N,N1,N1-tetramethylethylenediamene as crosslinker-initiator pair system. The formation of the hydrogels was conformed form Fourier transform infrared spectra and thermogravimetric analysis. The prepared hydrogels were characterized by swelling studies and optical transparency measured with UV-visible spectroscopy and actuation test in the presence of electric field. There is an optimal concentration of acrylic acid concentration that shows maximum displacement output with less optical transparency loss. Displacement output increased with increasing the voltage and the maximum displacement output of 15.5 μm was achieved in the presence of electrical field. This corresponds to 4% strain.
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Abbreviations
- PVA:
-
Poly vinyl alcohol
- PAA:
-
Poly acrylic acid
- PAP:
-
Poly vinyl alcohol-poly acrylic acid
References
Kim, S., Yeo, E., Kim, J. H., Yoo, Y.-E., Choi, D.-S., et al., “Geometry Modulation of Microlens Array Using Spin Coating and Evaporation Processes of Photoresist Mixture,” Int. J. Precis. Eng. Manuf.-Green Tech., Vol. 2, No. 3, pp. 231–235, 2015.
Shin, W. H., Min, M. S., Lee, T. H., Jho, J. Y., and Rhee, K., “Computational Simulation of Spirally Coiled Deformation of a Bi-Layered Hydrogel Strip Induced by Swelling,” Int. J. Precis. Eng. Manuf., Vol. 16, No. 2, pp. 409–412, 2015.
Ho, C. M. B., Ng, S. H., and Yoon, Y.-J., “A Review on 3D Printed Bioimplants,” Int. J. Precis. Eng. Manuf., Vol. 16, No. 5, pp. 1035–1046, 2015.
Azizi, S. M. A. S., Alloin, F., and Dufresne, A., “Review of Recent Research into Cellulosic Whiskers, Their Properties and Their Application in Nanocomposite Field,” Biomacromolecules, Vol. 6, No. 2, pp. 612–626, 2005.
Andreopoulos, F. M., Beckman, E. J., and Russell, A. J., “Light-Induced Tailoring of Peg-Hydrogel Properties,” Biomaterials, Vol. 19, No. 15, pp. 1343–1352, 1998.
Lee, H., Mensire, R., Cohen, R. E., and Rubner, M. F., “Strategies for Hydrogen Bonding Based Layer-by-Layer Assembly of Poly (Vinyl Alcohol) with Weak Polyacids,” Macromolecules, Vol. 45, No. 1, pp. 347–355, 2011.
Naficy, S., Razal, J. M., Spinks, G. M., Wallace, G. G., and Whitten, P. G., “Electrically Conductive, Tough Hydrogels with pH Sensitivity,” Chemistry of Materials, Vol. 24, No. 17, pp. 3425–3433, 2012.
Gao, X., He, C., **ao, C., Zhuang, X., and Chen, X., “Synthesis and Characterization of Biodegradable pH-Sensitive Poly (Acrylic Acid) Hydrogels Crosslinked by 2-Hydroxyethyl Methacrylate Modified Poly (l-Glutamic Acid),” Materials Letters, Vol. 77, pp. 74–77, 2012.
Elliott, J. E., Macdonald, M., Nie, J., and Bowman, C. N., “Structure and Swelling of Poly (Acrylic Acid) Hydrogels: Effect of pH, Ionic Strength, and Dilution on the Crosslinked Polymer Structure,” Polymer, Vol. 45, No. 5, pp. 1503–1510, 2004.
Gulyuz, U. and Okay, O., “Self-Healing Poly (Acrylic Acid) Hydrogels with Shape Memory Behavior of High Mechanical Strength,” Macromolecules, Vol. 47, No. 19, pp. 6889–6899, 2014.
Mirmohseni, A. and Wallace, G., “Preparation and Characterization of Processable Electroactive Polyaniline-Polyvinyl Alcohol Composite,” Polymer, Vol. 44, No. 12, pp. 3523–3528, 2003.
Lee, Y. M., Kim, S. H., and Cho, C. S., “Synthesis and Swelling Characteristics of pH and Thermoresponsive Interpenetrating Polymer Network Hydrogel Composed of Poly (Vinyl Alcohol) and Poly (Acrylic Acid),” Journal of Applied Polymer Science, Vol. 62, No. 2, pp. 301–311, 1996.
Gudeman, L. F. and Peppas, N. A., “Preparation and Characterization of pH-Sensitive, Interpenetrating Networks of Poly (Vinyl Alcohol) and Poly (Acrylic Acid),” Journal of Applied Polymer Science, Vol. 55, No. 6, pp. 919–928, 1995.
Jayaramudu, T., Raghavendra, G. M., Varaprasad, K., Sadiku, R., Ramam, K., et al., “Iota-Carrageenan-Based Biodegradable Ag0 Nanocomposite Hydrogels for the Inactivation of Bacteria,” Carbohydrate Polymers, Vol. 95, No. 1, pp. 188–194, 2013.
Jayaramudu, T., Raghavendra, G. M., Varaprasad, K., Sadiku, R., and Raju, K. M., “Development of Novel Biodegradable Au Nanocomposite Hydrogels Based on Wheat: For Inactivation of Bacteria,” Carbohydrate Polymers, Vol. 92, No. 2, pp. 2193–2200, 2013.
Ahmad, J., Deshmukh, K., and Hägg, M. B., “Influence of TiO2 on the Chemical, Mechanical, and Gas Separation Properties of Polyvinyl Alcohol-Titanium Dioxide (PVA-TiO2) Nanocomposite Membranes,” International Journal of Polymer Analysis and Characterization, Vol. 18, No. 4, pp. 287–296, 2013.
Lee, Y. M., Kim, S. H., and Cho, C. S., “Synthesis and Swelling Characteristics of pH and Thermoresponsive Interpenetrating Polymer Network Hydrogel Composed of Poly (Vinyl Alcohol) and Poly (Acrylic Acid),” Journal of Applied Polymer Science, Vol. 62, No. 2, pp. 301–311, 1996.
Lu, Y., Wang, D., Li, T., Zhao, X., Cao, Y., et al., “Poly(Vinyl Alcohol)/Poly(Acrylic Acid) Hydrogel Coatings for Improving Electrode-Neural Tissue Interface,” Biomaterials, Vol. 30, No. 25, pp. 4143–4151, 2009.
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Jayaramudu, T., Li, Y., Ko, HU. et al. Poly(acrylic acid)-Poly(vinyl alcohol) hydrogels for reconfigurable lens actuators. Int. J. of Precis. Eng. and Manuf.-Green Tech. 3, 375–379 (2016). https://doi.org/10.1007/s40684-016-0047-x
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DOI: https://doi.org/10.1007/s40684-016-0047-x