Poly(lactic acid) for Sensing Applications
The piezoelectric responses of polymers in practical use are divided into the following classes with different piezoelectric characteristics: chiral polymers (optically active polymers), ferroelectric polymers, and cellular electrets. The piezoelectricity of chiral polymers is in response to shear strain, that of a ferroelectric polymer is in response to tensile strain, and that of cellular electrets is in response to strain perpendicular to the film surface. Study of the piezoelectricity of poly(l-lactic acid) (PLLA), which is a chiral polymer, has advanced in the last few decades, and its practical application to sensor devices has progressed accordingly. In this chapter, the piezoelectric characteristics of PLLA and its applications to sensor devices are systematically discussed.
KeywordsAngle detection Chirality Fiber Film Piezoelectricity PLLA Sensing Touch panel
This work was supported in part by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology, Japan. We appreciate receiving a 2016 Commendation for Science and Technology (Prizes for Science and Technology: Development) from the Minister of Education, Culture, Sports, Science and Technology, Japan.
- 1.Galetti P, DeRossi D, DeReggi A (eds) (1988) Medical applications of piezoelectric polymers. Gordon and Breach, New YorkGoogle Scholar
- 2.Wang T, Herbert J, Glass A (1988) The applications of ferroelectric polymers. Blackie, GlasgowGoogle Scholar
- 3.Nalwa H, Fukada E (eds) (1995) Ferroelectric polymers. Marcel Dekker, New YorkGoogle Scholar
- 5.Uchino K (eds) (2000) Ferroelectric devices. Marcel Dekker, New YorkGoogle Scholar
- 8.Carpi F, Smela E (eds) (2009) Biomedical applications of electroactive polymer actuators. Wiley, ChichesterGoogle Scholar
- 10.Nye J (ed) (1985) Physical properties of crystals. Clarendon Press, OxfordGoogle Scholar
- 13.Tajitsu Y (2002) Giant optical rotatory power and light modulation by polylactic acid film. In: Zhang Q, Fukada E (eds) Materials Research Society symposium proceedings book vol. 698. pp. 125–136Google Scholar
- 14.Tajitsu Y (2010) Basic study on controlling piezoelectric motion of chiral polymeric fiber. IEEE Trans Dielectr Electr Insul 17:1050–1055Google Scholar
- 18.Ando M, Kawamura H, Tajitsu Y et al (2013) A deformation detection touch panel using a piezoelectric poly(L-lactic acid) film. In: Proceedings of the 20th International Display Workshop, Sapporo Convention Center, Sapporo, Japan, 4–6 Dec 2013Google Scholar