Piezoelectricity as a fundamental property of wood

Fukada, Eiichi

doi:10.1007/bf00350276

Cited by 111 publications

(124 citation statements)

References 6 publications

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“…formed by unit cells of cellulose molecules ([C6H10O5]n) 11 . The cellulose belongs to the monoclinic symmetry with space group of C2 || x3 having a following piezoelectric tensor: …”

Section: Nanocellulose Piezoelectricitymentioning

confidence: 99%

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Cellulose Nanofibril Film as a Piezoelectric Sensor Material

Rajala

Siponkoski

Sarlin

et al. 2016

ACS Appl. Mater. Interfaces

244

178

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Self-standing films (45-μm thick) of native cellulose nanofibrils (CNF) were synthesized and characterized for their piezoelectric response. The surface and the microstructure of the films were evaluated with image-based analysis and scanning electron microscopy (SEM). The measured dielectric properties of the films at 1 kHz and 9.97 GHz indicated a relative permittivity of 3.47 and 3.38 and loss tangent tan  of 0.011 and 0.071, respectively. The films were used as functional sensing layers in piezoelectric sensors with corresponding sensitivities of 4.7 to 6.4 pC/N in ambient conditions. This piezoelectric response is expected to increase remarkably upon film polarization resulting from the alignment of the cellulose crystalline regions in the film. The CNF sensor characteristics were compared with those of polyvinylidene fluoride (PVDF) as reference piezoelectric polymer. Overall, the results suggest that CNF is a suitable precursor material for disposable piezoelectric sensors, actuator or energy generators with potential applications in the fields of electronics, sensors and biomedical diagnostics.

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“…formed by unit cells of cellulose molecules ([C6H10O5]n) 11 . The cellulose belongs to the monoclinic symmetry with space group of C2 || x3 having a following piezoelectric tensor: …”

Section: Nanocellulose Piezoelectricitymentioning

confidence: 99%

“…The piezoelectricity of wood, i.e., the change of electrical polarization in a material in response to mechanical stress 9 , has been known for decades 10,11 . The piezoelectric effect is highly enhanced if one considers the isolated crystalline building blocks of wood, namely cellulose nanocrystals (CNC) 12,13 .…”

mentioning

confidence: 99%

Cellulose Nanofibril Film as a Piezoelectric Sensor Material

Rajala

Siponkoski

Sarlin

et al. 2016

ACS Appl. Mater. Interfaces

244

178

View full text Add to dashboard Cite

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“…Moreover, many researchers have given their efforts to align cellulose with electric field or magnetic field (Kondo et al 2001;Sugiyama et al 1992;Kimura et al 2005;Bordel et al 2006). However, people have not paid their attention on improving piezoelectric effect in aligned cellulose film, although small piezoelectric effect in cellulose has been reported long time ago (Fukada 1968 ). Recently, cellulose has been discovered as a smart material that can be used as sensor and actuator materials ; b ).…”

Section: Security Classification Ofmentioning

confidence: 99%

Development of Augmented Leukemia/Lymphoma-Specific T-Cell Immunotherapy for Deployment with Haploidentical, Hematompoietic Progenitor-Cell Transplant

Cooper¹

2008

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This report deals piezoelectric paper made with cellulose by mechanically and electrically aligning regenerated cellulose films. Cellulose electro-active paper was prepared by dissolving cotton pulp in LiCl/N, N-dimethylacetamide solution and regenerating cellulose chains. An electric field was applied in the mechanical direction of cellulose films along with mechanical stretching. Alignment of cellulose chains was investigated in terms of applying electric field. The characteristics of cellulose films were analyzed by X-Ray diffractometer, Field emission scanning electron microscopy and High voltage electron microscopy. By applying the electric field, nanofibers of cellulose were generated and the crystallinity index was increased. When the piezoelectric charge constant was measured, it was gradually improved as increasing the applied electric field, which was associated with the increased cellulose crystallinity as well as the alignment of cellulose chains.

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“…EAPap is electrically activated due to a combination of ion migration and piezoelectric effect. Piezoelectric effect in cellulose has been reported long time ago, although its effect was small [6]. Piezoelectricity in cellulose is originated from dipolar orientation and monoclinic crystal structure of cellulose.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and characterization of piezo-paper made with cellulose

Kim

Yun

Kim

et al. 2008

Behavior and Mechanics of Multifunctional and Composite Materials 2008

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Piezoelectricity is one of major actuating mechanisms of a cellulose-based Electro-Active paper (EAPap). Wet drawn stretching method was introduced in the fabrication process of cellulose film to increase piezoelectricity of EAPap. The characteristics of wet drawn cellulose were studied by scanning electron microscope (SEM), X-ray diffractogram (XRD) and pull test. The performance of EAPap was evaluated by measuring bending displacement and piezoelectric charge constant. The performance of EAPap was sensitive to the fabrication process and material orientation of cellulose film. Aligning cellulose fibers in the fabrication process was a critical parameter to improve mechanical and electromechanical properties of EAPap. The experimental results provided that wet drawn stretching is an effective fabrication method to improve mechanical stiffness and piezoelectricity of EAPap.

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Piezoelectricity as a fundamental property of wood

Cited by 111 publications

References 6 publications

Cellulose Nanofibril Film as a Piezoelectric Sensor Material

Cellulose Nanofibril Film as a Piezoelectric Sensor Material

Development of Augmented Leukemia/Lymphoma-Specific T-Cell Immunotherapy for Deployment with Haploidentical, Hematompoietic Progenitor-Cell Transplant

Fabrication and characterization of piezo-paper made with cellulose

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