Abstract
Dielectric gels of various types are recently found electrically active, and can be used for actuators. Polymer gels swollen with large amount of dielectric solvent deforms by applying dc voltage. The deformation is based on the solvent flow (or ion drag) through the polymer network. They shows contractile, bending, and crawling deformation. Advantages are very swift deformation in air, small electric current, and large strain up to over 10 % depending on the degree of crosslinks among the polymer chain. Disadvantages are low durability because of the solvent bleed-out, and relatively high voltage.
Dielectric elastomers (sometime gel-like) can be good candidate when the polymer chains are flexible enough and sensitive enough to the electric field, although flexible polymer chains can not take the role of solvents. Similarity to the gel is that the electrically induced asymmetric charge distribution causes the bending deformation. Advantages of this system are low electric current, relatively swift deformation at high voltage, and good durability. Disadvantages of this system are requirement of high voltage, small strain, and basically very limited stress. For attaining large strain, very high voltages are necessary for the actuation such as over 10 kV/mm. We show the cases of polyurethane and poly(methyl methacrylate-b-n-butyl acrylate-b-methyl methacrylate) triblock copolymer.
Plasticized polymer system provides another possibility, and we think at this moment the best candidate from the viewpoint of easy processing and variable possibilities. Polymers with large content of plasticizer (we call this category as “polymer gel” in stead of plasticized polymer) shows peculiar deformation such as amoeba-like creep deformation. In some cases, we investigated the gels show high power, high toughness, very low current, and variable application possibilities. The characteristics comes out from the very large dielectric constant from the cooperative interaction between the polymer and plasticizer both of which have very low dielectric constant. By applying the characteristic properties, not only the electro-mechanical function but also the electro-optical functions and mechano-electric functions are found.
Through these investigations, we could conclude the dielectric gels have great possibilities as novel type of electro-active materials.
Keywords
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Katchalsky A (1949) Experientia 5:319
Osada Y (1987) Conversion of chemical into mechanical energy by synthetic polymers (Chemomechanical System). In: Advances in polymer science, vol 82, Springer, Berlin
Tanaka T, Ishiwata S, Ishimoto C (1977) Critical behavior of density fluctuations in gels. Phys Rev Lett 38(14):771–774
Osada Y, Okuzaki H, Hori H (1992) A polymer gel with electrically driven motility. Nature 355:242–244
Tanaka T et al (1982) Collapse of gels in an electric field. Science 218:467–469
Hirai T et al (1991) Fluttering wings – first step for flying up-above into the sky? Preprints of second symposium on polymer gels, December 10–11, Tsukuba, Japan, p 129
Hirai T et al (1991) Actuation of poly(vinyl alcohol) gel by applying electric field. Preprints of second symposium on polymer gels, pp 67–68
Hirai T et al (1991) Actuation of PVA gel by electric field. Polymer Prep 40(7):2116–2118
Hirai T et al (1993) Actuation of poly(vinyl alcohol) gel by electric field. J Intell Mater Syst Struc 4:277–279
Hirai M, Hirai T, Ueki T (1994) Growing process of scattering density fluctuation of a medium distance in the hydrogel of poly(vinyl alcohol) under stretching. Macromolecules 27(4):1003–1006
Hirai T et al (1994) Electrostriction of highly swollen polymer gel: possible application for gel actuator. J Appl Polym Sci 53(1):79–84
Hirai M et al (1995) Electrically induced reversible structural change of a highly swollen polymer gel network. J Chem Soc Faraday Trans 91:473–477
Hirai T et al (2000) Electroactive non-ionic gel and its application. In: Bar-Cohen Y (ed) Proceedings of the SPIE, smart structures and materials 2000: electroactive polymer actuators and devices (EAPAD), vol 3987, pp 281–290
Stuetzer OM (1959) Ion drag pressure generation. J Appl Phys 30(7):984–994
Hirai T et al (1996) Polyurethane elastomer actuator. Angew Makromol Chem 240:221–229
Watanabe M et al (1997) Bending deformation of monolayer polyurethane film induced by an electric field. Chem Lett 1997:773–774
Watanabe M et al (1999) Effects of polymer networks on the bending electrostriction of polyurethanes. In: Elgsaeter A, Stokke BT (eds) The Wiley polymer networks group review, vol 2. Wiley
Watanabe M, Hirai T (2004) Close relationship between bending-electrostrictive response and space charge distribution in a polyurethane film. J Appl Phys 43:1446–1448
Kornbluh R et al (2000) Ultra-high strain response of elastomeric polymer dielectrics. In: Materials research society symposium proceedings. Electroactive Polymers (EAP), vol 600, pp 119–130
Pelrine R et al (2001) Applications of dielectric elastomer actuators. In: Proceedings of the SPIE international society for optical engineering. Electroactive polymer actuators and devices, vol 4329, pp 335–349
Uddin MZ et al (2001) Electrically induced creeping and bending deformation of plasticized poly(vinyl chloride). Chem Lett 2001:360–361
Hirai T et al (2003) Electroactive artificial muscle: nonionic polymer gels and elastomers. In: Mohan S, Dattaguru B, Gopalakrishnan S (eds) Proceedings of the SPIE, smart materials, structures, and systems, vol 5062, pp 378–388
Hirai T et al (2003) Quick and large electrostrictive deformation of non-ionic soft polymer materials. In: Bar-Cohen Y (eds) Proceedings of the SPIE, smart structures and materials 2003: electroactive polymer actuators and devices (EAPAD), vol 5051, pp 198–206
Hirai T, Ogiwara T, Fujii K, Ueki T, Kinoshita K, Takasaki M (2009) Electrically active artificial pupil showing amoeba-like pseudopodial deformation. Adv Mater 21(28):2886–2888
Hirai T, Uddin MZ, Zheng J, Watanabe M, Shirai H (2002) Electroactive artificial muscle: non-ionic polymer gels and elastomers. In: Proceedings of international conference on smart materials, structures & systems. Microart, Bangalore
Uddin MZ et al (2002) Creeping and novel huge bending of plasticized PVC. J Robot Mechatr 14(2):118–123
Ali M et al (2011) Influence of plasticizer content on the transition of electromechanical behavior of PVC gel actuator. Langmuir 27(12):7902–7908
Ali M, Hirai T (2011) Characteristics of the creep-induced bending deformation of a PVC gel actuator by an electric field. J Mater Sci 46(24):7681–7688
Ali M, Hirai T (2012) Effect of plasticizer on the electric-field-induced adhesion of dielectric PVC gels. J Mater Sci 47(8):3777–3783
Ali M, Hirai T (2012) Relationship between electrode polarization and electrical actuation of dielectric PVC gel actuators. Soft Mater 8:3694–3699
Xia H, Ueki T, Hirai T (2011) Direct observation by laser scanning confocal microscopy of microstructure and phase migration of PVC gels in an applied electric field. Langmuir 27(3):1207–1211
Xia H, Takasaki M, Hirai T (2010) Actuation mechanism of plasticized PVC by electric field. Sens Actuators A Phys 157:307–312
Xia H, Hirai T (2010) Electric-field-induced local layer structure in plasticized PVC actuator. J Phys Chem B 114(33):10756–10762
Satou H, Hirai T (2013) Electromechanical and electro-optical functions of plasticized PVC with colossal dielectric constant. In: Proceedings of SPIE, electroactive polymer actuators and devices (EAPAD), vol 8687, p 868728-1-7
Tanaka Y, Hirai T (2013) Mechanoelectric function of plasticized poly(vinyl chloride) for impact sensor and energy harvesting. In: 62nd SPSJ symposium on macromolecules, polymer preprints, Japan, vol 3635. The Society of Polymer Science, Kanazawa University, Kanazawa, Japan. p 2ESB1
Tsurumi D, Hirai T (2013) Electrically induced oscillatory motion of dielectric soft polymer materials. In: 62nd SPSJ symposium on macromolecules, polymer preprints, Japan, vol 3637. The Society of Polymer Science, Japan. p 2ESB12
Chattok AP (1899) On the velocity and mass of the ions in the electric wind in air (fifth series). Phil Mag 48(294):401–420
Stuetzer OM (1959) Instability of certain electrohydrodynamic systems. Phys Fluids 2(6):642–648
Pickard WF (1963) Ion drag pumping. II. Experiment. J Appl Phys 34(2):251–258
Pickard WF (1963) Ion drag pumping. I. Theory. J Appl Phys 34(2):246–250
Jorgenson GV, Will E (1962) Improved ion drag pump. Rev Sci Instrum 33(1):55–56
Fujita H (1988) Micro-actuator and micromechanical parts. IEEJ Trans 108(3):214–217
Tsuchida N, Satou H, Ueda M (1983) The mobilities of various impurity ions in silicone oil. IEEE Trans Jpn 103(1):47–52
Tsuchida N, J O, Murata R, Yamada Y, Imai K (1993) Studies on DC micro motor employing EHD stream by ion drag. IEEE Trans Jpn 113(12):1442–1448
Hirai T (1991) High speed responding polymer gel actuator. Japan patent has been requested
Hirai T, Hirai M, Hayashi S, Ueki T (1992) Study of the conformational change of amylose induced by complexation with iodine using synchrotron X-ray small-angle scattering. Macromolecules 25(24):6699–6702
Watanabe M et al (2003) A pumping technique using electrohydrodynamic flow inside a gel. IEEE Trans Dielectr Electr Insul 10(1):181–185
Watanabe M et al (1999) Effects of polymer networks on the bending electrostriction of polyurethanes. In: Wiley polymer networks group review series, vol 2 (Synthetic versus Biological Networks), pp 213–221
Watanabe M et al (2000) Hysteresis in bending electrostriction of polyurethane films. J Appl Polym Sci 79(6):1121–1126
Xiu Y et al (1993) Morphology-property relationship of segmented polyurethaneurea: influences of soft-segment structure and molecular weight. J Appl Polym Sci 48:867–869
Jang Y, Hirai T (2011) A control method for triblock copolymer actuators by nano-lamellar pattern. Soft Mater 7(22):10818–10823
Jang Y et al (2011) Performance of PMMA-PnBA-PMMA dielectric film actuator with controllable phase morphology. Sens Actuators A Phys 168:300–306
Yasuda A, Kinoshita T, Hirai T (2011) Focusing device and imaging device. Seiko Precision Inc., Chiba, p 10
Hirai T et al (2012) Plasticized poly(vinyl chloride) gel as super paraelectric actuator. In: IUMRS-international conference on electronic materials (IUMRS-ICEM 2012), 23–28 September, 2012. The Materials Research Society of Japan (MRS-J), Pacifico Yokohama, Yokohama, Japan
Sato H, Gotoh Y, Hirai T (2013) The electro-optic effect of PVA gel and PVC gel. In: 62nd SPSJ symposium on macromolecules, polymer preprints, Japan, vol 3639. The Society of Polymer Science, Kanazawa University, Kanazawa, Japan, p 2ESB13
Haken H, Wagner M (1973) Cooperative phenomena. Springer, Berlin
Zwicky F (1933) On cooperative phenomena. Phys Rev 43(4):270–278
Xia H, Hashimoto Y, Hirai T (2012) Electric-field-induced actuation of poly(vinyl alcohol) microfibers. J Phys Chem C 116:23236–23242
Xia H, Hirai T (2013) New shedding motion, based on electroactuation force, for micro- and nanoweaving. Adv Eng Mater Commun 2013:1–4
Hirai T, Zheng J, Watanabe M, Shirai H (2001) Electrically active polymer materials: application of non-ionic polymer gel and elastomers for artificial muscles. In: Tao XM (ed) Smart fibres, fabrics and clothing: fundamentals and applications. CRC, Boca Raton
Sakurai T (2012) Smart community and ambient electronics. Panasonic Tech J 58(1):4–7
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Hirai, T. (2019). Dielectric Gels. In: Asaka, K., Okuzaki, H. (eds) Soft Actuators. Springer, Singapore. https://doi.org/10.1007/978-981-13-6850-9_13
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DOI: https://doi.org/10.1007/978-981-13-6850-9_13
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