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Polymer Dispersed Liquid Crystals (PDLCs): A Mini Review

Ayushi Rastogi

Department of Humanities and Applied Sciences, School of Management Sciences, Lucknow, Uttar Pradesh, 226001, India.

*Corresponding author: Ayushi Rastogi

Date: November 8,2022 Hits: 1374


Polymer dispersed liquid crystals (PDLCs) have piqued the interest of researchers due to their exceptional property of electronically controlled switching mechanism. PDLC devices are sort of smart glazing/film that responds to electrical stimulus by changing its transparency. When liquid crystals are inactive, they are randomly organized, scattering light as it passes through the screen, giving the assembly its transparent, milky look. When a voltage is added, an electrical field forms between the two electrodes, causing the liquid crystals to align and enable light to flow through, thereby rendering the screen transparent. However, difficulties like as low contrast ratio, high operating voltage, and poor mechanical characteristics limit their practical uses. To address these issues, several procedures were implemented, including optimization of molecular structure of monomers and liquid crystals, addition of nanoparticles, and PDLC modification. This mini review will go through the current advancements in the method, preparations, and applications of PDLCs.


[1] Zhong, T., Mandle, R.J., Goodby, J.W., Zhang, L., Zhang, C. Comparative studies of polymer-dispersed liquid crystal films via a thiol-ene click reaction. Polym. Adv. Technol. 2019, 30, 2781-2789. 

[2] Shen, W., Wang, L., Zhong, T., Chen, G., Li, C., Chen, M., Zhang, C., Zhang, L., Li, K., Yang, Z., et al. Electrically switchable light transmittance of epoxy-mercaptan polymer/nematic liquid crystal composites with controllable microstructures. Polymer 2019, 160, 53-64. 

[3] Hu, G., Chen, H., Liu, Z., Zhang, S., Zhou, Y., Zhu, B., Gu, H. Tailoring structure and properties of polymer-dispersed liquid crystal by quenching process. Liq. Cryst. 2020, 46, 1-9.

[4] Zhang, S., Li, C., Wang, Q., Zhou, L., Saeed, M.H., Wang, X., Zhang, L., Yang, Z., Yang, H. Fluorescence enhancement and encapsulation of quantum dots via a novel crosslinked vinyl-ether liquid crystals/polymer composite film. Polymer 2020, 207, 122834.

[5] Zhou, L., Chen, G., Shen, W., Zhang, C., Lanying, Z. Effect of functionality of thiol on the optical properties of liquid crys-tals/polymer composite films. Liq. Cryst. 2020, 5, 1-9.

[6] Jiang, J., McGraw, G., Ma, R., Brown, J., Yang, D.-K. Selective scattering polymer dispersed liquid crystal film for light enhancement of organic light emitting diode. Opt. Express 2017, 25, 3327-3335. 

[7] Seo, J., Nam, S., Jeong, J., Lee, C., Kim, H., Kim, Y. Liquid Crystal-Gated-Organic Field-effect Transistors with In-Plane Drain–Source–Gate Electrode Structure. ACS Appl. Mater. Interfaces 2014, 7, 504-510.

[8] Nasir, N., Hong, H., Rehman, M.A., Kumar, S., Seo, Y. Polymer-dispersed liquid-crystal-based switchable glazing fabricated via vacuum glass coupling. RSC Adv. 2020, 10, 32225-32231.

[9] Labeeb, A.M., Ibrahim, S.A., Ward, A.A., Abd-El-Messieh, S.L. Polymer/liquid crystal nanocomposites for energy storage applications. Polym. Eng. Sci. 2020, 12, 1-12.

[10] Zhong, T., Mandle, R.J., Goodby, J.W., Zhang, C., Zhang, L. Thiol-ene reaction based polymer dispersed liquid crystal composite films with low driving voltage and high contrast ratio. Liq. Cryst. 2019, 1-13.

[11] Chen, M., Liang, X., Hu, W., Zhang, L., Zhang, C., Yang, H. A polymer microsphere-filled cholesteric-liquid crystal film with bistable electro-optical characteristics. Mater. Des. 2018, 157, 151-158. 

[12] Shao, L., Li, J., Zhang, Y., Gong, S., Wang, Y. E_ect of macro-RAFT agent on the morphology of polymer dispersed liquid crystals. Liq. Cryst. 2014, 41, 652-661. 

[13] Li, C., Chen, M., Zhang, L., Shen, W., Liang, X., Wang, X., Yang, H. An electrically light-transmittance-switchable film with a low driving voltage based on liquid crystal/polymer composites. Liq. Cryst. 2019, 47, 1-8. 

[14] Chen, M., Hu, W., Liang, X., Zhang, H., Zhang, C., Song, P., Zhang, L., Li, F., Chen, F., Yang, H. The regulation of polymer structures and electro-optical properties of epoxy-mercaptan-based phase separated liquid crystals/polymer composites. Polymer 2017, 127, 1-7. 

[15] Kim, J., Han, J.I. Effect of UV intensity on the electro-optical properties of polymer dispersed liquid crystal lens for smart electronic glasses. Electron. Mater. Lett. 2014, 10, 665-669.

[16] Rumi, M., Bunning, T.J., Sio, L.D.E. Polymer dispersed liquid crystals. Soft Mater. Ser. 2019, 8, 61-104.

[17] Singh, S., Srivastava, J.K., Singh, R.K. Polymer dispersed liquid crystals. Liq. Cryst. Polym. 2016, 7, 195-250.

[18] Bronnikov, S., Kostromin, S., Zuev, V. Polymer-Dispersed Liquid Crystals: Progress in Preparation, Investigation, and Application. J. Macromol. Sci. Part B 2013, 52, 1718-1735. 

[19] Ahmad, F., Jeon, Y.J., Jamil, M. Graphene-based polymer dispersed liquid crystals display—An overview. Mol. Cryst. Liq. Cryst. 2018, 669, 46-60. 

[20] Jamil, M., Ahmad, F., Rhee, J. Nanoparticle-doped polymer-dispersed liquid crystal display. Curr. Sci. 2011, 101, 1544-1552.

[21] Yang, D., Wu, S. Liquid Crystal/Polymer Composites. In Fundamentals of Liquid Crystal Devices; John Wiley & Sons: Hoboken, NJ, USA, 2014; Volume 11, pp. 363-412.

[22] Higgins, D.A. Probing the Mesoscopic Chemical and Physical Properties of Polymer-Dispersed Liquid Crystals. Adv. Mater. 2000, 12, 251-264. 

[23] Liu, J., Liu, X., Zhen, Z. Effects of chiral additives on the electro-optical properties of polymer dispersed liquid crystal. Mater. Lett. 2016, 163, 142-145. 

[24] Li, W., Cao, H., Kashima, M., Liu, F., Cheng, Z., Yang, Z., Zhu, S., Yang, H. Control of the microstructure of polymer network and effects of the microstructures on light scattering properties of UV-cured polymer-dispersed liquid crystal films. J. Polym. Sci. Part B Polym. Phys. 2008, 46, 2090-2099. 

[25] Ellahi, M., Liu, F., Song, P., Gao, Y., Rafique, M.Y., Khan, D.F., Cao, H., Yang, H. Characterization and morphology of polymer-dispersed liquid crystal films. Soft Mater. 2014, 12, 339-345. 

[26] Li, W., Yu, L., He, W., Yuan, X., Zhao, N., Huang, W., Cao, H., Yang, Z., Yang, H. Effect of a Photopolymerizable Monomer Containing a Hydrogen Bond on Near-Infrared Radiation Transmittance of Nematic Liquid Crystal/Monomers Composites. J. Phys. Chem. C 2008, 112, 13739-13743. 

[27] Ahmad, F., Jamil, M., Jeon, Y.J., Woo, L.J., Jung, J.E., Jang, J.E., Lee, G.H., Park, J. Comparative study on the electrooptical properties of polymer-dispersed liquid crystal films with di_erent mixtures of monomers and liquid crystals. J. Appl. Polym. Sci. 2011, 121, 1424-1430. 

[28] Manda, R., Pagidi, S., Kim, M., Park, C.H., Yoo, H.S., Sandeep, K., Lim, Y.J., Lee, S.H. Effect of monomer concentration and functionality on electro-optical properties of polymer-stabilised optically isotropic liquid crystals. Liq. Cryst. 2017, 45, 736-745.

[29] Mouquinho, A., Figueirinhas, J., Sotomayor, J. Digital optical memory devices based on polymer-dispersed liquid crystals films: Appropriate polymer matrix morphology. Liq. Cryst. 2019, 47, 636-649.

[30] Kizhakidathazhath, R., Nishikawa, H., Okumura, Y., Higuchi, H., Kikuchi, H. High-Performance Polymer Dispersed Liquid Crystal Enabled by Uniquely Designed Acrylate Monomer. Polymers 2020, 12, 1625.

[31] Saeed, M.H., Zhang, S., Zhou, L., Chen, G., Wang, M., Zhang, L., Yang, D., Yang, H. Effects of rigid structures containing (meth)acrylate monomers and crosslinking agents with different chain length on the morphology and electro-optical properties of polymer-dispersed liquid crystal films. J. Mod. Opt. 2020, 67, 682-691.

[32] Zhang, H., Zhong, T., Chen, M., Zhang, L., Liu, X., Cao, H., Yang, H., Zhu, S. The physical properties of alkene-terminated liquid crystal molecules/E8 mixture and the electro-optical properties as they doped in polymer-dispersed liquid crystal systems. Liq. Cryst. 2017, 45, 1118-1128. 

[33] Zhang, H., Cao, H., Chen, M., Zhang, L., Jiang, T., Chen, H., Li, F., Zhu, S., Yang, H. Effects of the fluorinated liquid crystal molecules on the electro-optical properties of polymer dispersed liquid crystal films. Liq. Cryst. 2017, 44, 2301-2310. 

[34] Zhang, H., Chen, M., Jiang, T., Chen, H., Zhang, D., Sun, Y., Zhang, L., Zhu, S., Yang, H. Cyano terminated tolane compounds for polymer dispersed liquid crystal application: Relationship between cyano terminated tolane based molecular structures and electro-optical properties. Liq. Cryst. 2018, 45, 1771-1782.

[35] Mishra, K.K., Dubey, S.K., Mani, S.A. Optical characterization of inorganic nanoparticles doped in polymer dispersed liquid crystal. Mol. Cryst. Liq. Cryst. 2017, 647, 244-252. 

[36] Liu, Y., Zheng, J., Jiang, Z., Zhu, Q., Chen, Q., Zhuang, S. Optical and dielectric analysis of ZnO nanorods doped polymer dispersed liquid crystal and ethanol gas sensing investigation. Liq. Cryst. 2020, 1-10.

[37] He, T., Yang, B., Zhang, L., Shi, Z., Gong, X., Geng, P., Gao, Z., Wang, Y. A study on electro-optical properties of polymer dispersed liquid crystal films doped with barium titanate nanoparticles prepared by nucleophile-initiated thiol-ene click reaction. Liq. Cryst. 2019, 47, 1004-1018. 

[38] Hsu, C.-C., Chen, Y.-X., Li, H.-W., Hsu, J.-S. Low switching voltage ZnO quantum dots doped polymer-dispersed liquid crystal film. Opt. Express 2016, 24, 7063-7068. 

[39] Kumari, A., Sinha, A. Role of BaTiO3 nanoparticles on electro-optic performance of epoxy-resin-based PDLC devices. Liq. Cryst. 2020, 1-12. 

[40] Shim, H., Lyu, H.-K., Allabergenov, B., Garbovskiy, Y., Glushchenko, A.; Choi, B. Enhancement of frequency modulation response time for polymer-dispersed liquid crystal. Liq. Cryst. 2016, 43, 1390-1396.

[41] Kocakülah, G., Balci, S., Köysal, O. Determination of Phase Transition and Electro-Optical Behaviors of Quantum Dot Doped Polymer Dispersed Liquid Crystal. J. Electron. Mater. 2020, 49, 3427-3434. 

[42] John, V.N., Varanakkottu, S.N., Varghese, S. Flexible, ferroelectric nanoparticle doped polymer dispersed liquid crystal devices for lower switching voltage and nanoenergy generation. Opt. Mater. 2018, 80, 233-240.

[43] Jayoti, D., Malik, P. Dielectric Study of Gold Nanoparticle Doped Polymer Dispersed Liquid Crystal. In Proceedings of the 2nd International Conference On Condensed Matter and Applied Physics (ICC 2017), Bikaner, India, 24-25 November 2017; Volume 1953. 

[44] Ji, Y.-Y., Fan, F., Zhang, X., Cheng, J.-R., Chang, S.-J. Terahertz birefringence anisotropy and relaxation effects in poly-mer-dispersed liquid crystal doped with gold nanoparticles. Opt. Express 2020, 28, 17253-17265.

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Polymer Dispersed Liquid Crystals (PDLCs): A Mini Review

How to cite this paper: Ayushi Rastogi. (2022) Polymer Dispersed Liquid Crystals (PDLCs): A Mini Review. Journal of Electrical Power & Energy Systems6(1), 71-75.

DOI: http://dx.doi.org/10.26855/jepes.2022.11.001