Yazar "Anand, Subhash C." seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • Küçük Resim
    Öğe
    Evaluating the fabric performance and antibacterial properties of 3-D piezoelectric spacer fabric
    (Taylor & Francis Ltd, 2018) Vatansever Bayramol, Derman; Soin, Navneet; Dubey, Amrita; Upadhyay, Ravi Kant; Priyadarshini, Richa; Roy, Susanta Sinha; Anand, Subhash C.
    The increasing need of on-demand power for enabling portable low-power devices and sensors has necessitated work in novel energy harvesting materials and devices. In a recent work, we demonstrated the production and suitability of three-dimensional (3-D) spacer all fibre piezoelectric textiles for converting mechanical energy into electrical energy for wearable and technical applications. The current work investigates the textile performance properties of these 3-D piezoelectric fabrics including porosity, air permeability, water vapour transmission and bursting strength. Furthermore, as these textiles are intended for wearable applications, we have assessed their wear abrasion and consequently provide surface resistance measurements which can affect the lifetime and efficiency of charge collection in the piezoelectric textile structures. The results show that the novel smart fabric with a measured porosity of 68% had good air (1855l/m(2)/s) and water vapour permeability (1.34g/m(2)/day) values, good wear abrasion resistance over 60,000 rotations applied by a load of 12kPa and bursting strength higher than 2400kPa. Moreover, the antibacterial activity of 3-D piezoelectric fabrics revealed that owing to the use of Ag/PA66 yarns, the textiles exhibit excellent antibacterial activity against not only Gram-negative bacteria E. coli but they are also capable of killing antibiotic methicillin-resistant bacteria S. aureus.
  • Küçük Resim
    Öğe
    Novel 3-D spacer all fibre piezoelectric textiles for energy harvesting applications
    (Royal Soc Chemistry, 2014) Soin, Navneet; Shah, Tahir H.; Anand, Subhash C.; Geng, Junfeng; Pornwannachai, Wiwat; Mandal, Pranab; Siores, Elias; Bayramol, Derman Vatansever
    The piezoelectric effect in poly(vinylidene fluoride), PVDF, was discovered over four decades ago and since then, significant work has been carried out aiming at the production of high beta-phase fibres and their integration into fabric structures for energy harvesting. However, little work has been done in the area of production of true piezoelectric fabric structures based on flexible polymeric materials such as PVDF. In this work, we demonstrate 3D spacer technology based all-fibre piezoelectric fabrics as power generators and energy harvesters. The knitted single-structure piezoelectric generator consists of high beta-phase (similar to 80%) piezoelectric PVDF monofilaments as the spacer yarn interconnected between silver (Ag) coated polyamide multifilament yarn layers acting as the top and bottom electrodes. The novel and unique textile structure provides an output power density in the range of 1.10-5.10 mW cm(-2) at applied impact pressures in the range of 0.02-0.10 MPa, thus providing significantly higher power outputs and efficiencies over the existing 2D woven and nonwoven piezoelectric structures. The high energy efficiency, mechanical durability and comfort of the soft, flexible and all-fibre based power generator are highly attractive for a variety of potential applications such as wearable electronic systems and energy harvesters charged from the ambient environment or by human movement.