, Volume 26, Issue 18, pp 9673–9685 | Cite as

Facile design of pressure-sensing color films of liquid crystalline cellulosic/synthetic polymer composites that function at desired temperatures

  • Kazuma Miyagi
  • Yoshikuni TeramotoEmail author
Original Research


We have developed a facile method for material design of pressure-sensing films for various operating temperatures using cholesteric liquid crystalline (ChLC) cellulose derivatives. A series of acetylated hydroxypropyl celluloses (AHPCs) with different degrees of acetylation (DSAc) was prepared and their concentrated solutions in monomeric solvents showed coloration based on the selective reflection of ChLC. The critical coloration concentration of the AHPC/monomer solutions decreased with increasing DSAc because the twist angle of the cholesteric helix increased by introducing acetyl groups. The ChLC solutions were subsequently subjected to in situ polymerization to immobilize the ChLC structure in the produced composites. The ChLC structure was well immobilized in the composites with moderate compatibility between the component polymers. The obtained AHPC/polymer ChLC composites exhibited compression-induced mechanochromism, and consistent pressure sensitivity was achieved at various temperatures by selection of the counter polymer species. This approach is applicable for designing pressure-sensing films tailored to the operating temperature.

Graphic abstract


Mechanochromism Cholesteric liquid crystal Cellulose derivatives Pressure-sensing In-situ polymerization 



This work was financially supported by a Grant-in-Aid for Scientific Research (A) (17H01480) from the Japan Society for the Promotion of Science and the JST-Mirai Program (Grant No. JPMJMI18E3). We thank Edanz Group ( for editing a draft of this manuscript.

Compliance with ethical standards

Conflict of interest

The authors declare no conflict of interest.

Supplementary material

10570_2019_2769_MOESM1_ESM.docx (561 kb)
Supplementary material 1 (DOCX 561 kb)


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Copyright information

© Springer Nature B.V. 2019

Authors and Affiliations

  1. 1.The United Graduate School of Agricultural ScienceGifu UniversityGifuJapan
  2. 2.Division of Forest and Biomaterials ScienceKyoto UniversitySakyo-ku, KyotoJapan

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