J Schütte

Bio: J Schütte is an academic researcher. The author has contributed to research in topics: Piezoelectricity & Stress (mechanics). The author has an hindex of 1, co-authored 1 publications receiving 16 citations.

Characterisation of piezoelectric PVDF monofilaments

Abstract: The piezoelectric effect of poly(vinylidene fluoride) is demonstrated in monofilaments These fibres produce electrical signal upon mechanical deformation The structure of the monofilaments is analysed by wide angle X-ray diffraction and differential scanning calorimetry, whereas the crystalline fraction mainly consists of the piezoelectric β phase For polarisation and electromechanical characterisation, poly(vinylidene fluoride)-epoxy composites are manufactured, whereas all the filaments are aligned parallel to the composite structure The electric signal is two magnitudes of order larger for the polarised samples compared to the unpolarised ones Furthermore, there is a clear anisotropy, allowing the direction dependent measurement of stress and strain Mechanical stress in the fibre direction produces a much larger signal compared to the same stress in the perpendicular direction

Poling and characterization of piezoelectric polymer fibers for use in textile sensors

Abstract: This study reports on the poling and characteristics of a melt-spun piezoelectric bicomponent fiber with poly(vinylidene fluoride) (PVDF) as its sheath component and a conductive composite with car ...

Piezoelectric polymeric bicomponent fibers produced by melt spinning

Abstract: Melt spinning of a novel piezoelectric bicomponent fiber, with poly(vinylidene fluoride) as the electroactive sheath component, has been demonstrated. An electrically conductive compound of carbon black (CB) and high density polyethylene was used as core material, working as an inner electrode. A force sensor consisting of a number of fibers embedded in a soft CB/polyolefin elastomer matrix was manufactured for characterization. The fibers showed a clear piezoelectric effect, with a voltage output (peak-to-peak) of up to 40 mV under lateral compression. This continuous all-polymer piezoelectric fiber introduces new possibilities toward minimal single fiber sensors as well as large area sensors produced in standard industrial weaving machines.

Thermal Analysis of Phase Transitions and Crystallization in Polymeric Fibers

Abstract: Each year about 50 Million tons polymer is processed to fibers worldwide [1]. Polymeric fibers are manufactured into all sorts of daily as well as industrial goods [2, 3]. The most prominent materials are thermoplastic among which poly(ethylene terephtalat) (PET), polyamides (PA) and polypropylene (PP) make up the largest fraction [4]. Other thermoplastic polymers such as poly(vinylidene fluoride) (PVDF) belong to niche markets with highly specialized applications [5-7].

On the Measurement of the Electrical Power Produced by Melt Spun Piezoelectric Textile Fibres

Abstract: Piezoelectric, melt spun, textile fibres as multifunctional materials appeared recently, and they are under thorough investigation and testing in order to define their performance and behaviour. Although piezoelectricity was first reported in 1880 and the piezoelectric behaviour of organic polymers materials has been known since 1969, the fibrous form of the piezoelectric materials under consideration opens new technological horizons; however, it introduces novel restrictions and further complex parameters are involved in their study. The major issue of the current research work is the study of the actual capacity of the piezoelectric fibres, i.e. the electric power produced following mechanical stimulation of the individual fibre. The measurements were made possible after the development of the necessary specific equipment. The test results enabled the ranking of the various types of the piezoelectric fibres according to the respective power generation. The main difference in this research approach is the measurement of the power generated by the fibres. Measurement of the power generated by an electrical power source (in the case of energy harvesting applications which is the prime interest of this research project) is an important characteristic as the requirements of various applications are expressed in units of power. Stating the voltage produced during mechanical deformation of the fibres is not enough (cf. voltage produced due to electrostatic phenomena on textiles where the voltage is in the range is the several kV, but the power is not enough to power a light-emitting diode).