Spirograph based electrospinning system for producing fibre mat with near uniform mechanical property

This study focuses on the development of Spirograph-based mechanical system (SBMS) for the collection ofpolyacrylonitrile fibres in an electrospinning process. The collector plate is set to trace a spiropath in such a way that theevent of crossing the centre of collection region from different radial direction is high. To assess the capability of SBMS,electrospun mat of acrylic has been prepared and the properties of samples sectioned from different angular positions of acircular mat are evaluated. The diameter and alignment of fibres are analyzed by processing the scanning electronmicroscopy (SEM) images of electrospun mats with the use of ImageJ software. The electrospun mat produced using SBMScollector assembly exhibits near uniform characteristics like thickness, tensile strength, porosity, fibre diameter and fibrealignment as compared to the electrospun mat produced by using conventional static collector

Effect of yarn twist on mechanical properties of glass fibre reinforced composite rods

343-346Effect of twist of glass yarns on the tensile, flexural and interfacial shear properties of composites has been studied. The glass fibre reinforced composite rods have been prepared by hand pultrusion technique with various twist levels. It is found that with the increase in twist level in yarns, the tensile, flexural and interfacial shear strength properties of the composites increase upto 0.25 TPI, 1.0 TPI and 0.75 TPI respectively, followed by decrease in the properties of the composites

Spirograph based electrospinning system for producing fibre mat with near uniform mechanical property

279-285This study focuses on the development of Spirograph-based mechanical system (SBMS) for the collection of polyacrylonitrile fibres in an electrospinning process. The collector plate is set to trace a spiropath in such a way that the event of crossing the centre of collection region from different radial direction is high. To assess the capability of SBMS, electrospun mat of acrylic has been prepared and the properties of samples sectioned from different angular positions of a circular mat are evaluated. The diameter and alignment of fibres are analyzed by processing the scanning electron microscopy (SEM) images of electrospun mats with the use of ImageJ software. The electrospun mat produced using SBMS collector assembly exhibits near uniform characteristics like thickness, tensile strength, porosity, fibre diameter and fibre alignment as compared to the electrospun mat produced by using conventional static collector

Effect of lay-up angle and layers on mechanical properties of composites based on rib knit jute inlaid preforms

422-425The mechanical properties of knitted jute inlaid reinforced composites with different stacking sequences and number of layers have been studied. Flat rib knitted preforms have been produced in manual flatbed knitting machine followed by composite laminate preparation using simple hand lay-up technique. It is observed that the mechanical properties are dependant upon the stacking sequence and number of layers

Analiza jednorodności włóknin wytwarzanych przy użyciu kolektorów statycznych i dynamicznych

In an electrospinning process, as the deposition of fibres occurs randomly over the collector, the mats produced are generally expected to have homogeneous properties throughout the mat. This study compares the ultimate tensile strength, porosity, thickness and morphology of the different portions of mats sectioned at various angular locations. The influence of the template design and mode of operation of the collectors on the properties of electrospun mats were investigated. The inhomogeneity in the properties of the electrospun mat produced using stationary collectors was significant, irrespective of the different template design of the collectors. However, the collectors operated in the dynamic mode decrease variations in the properties among the different sections of the electrospun mats. By choosing a particular template design and mode of operation of the collector, an electrospun mat of desired orientation can be achieved.W pracy porównano wytrzymałość na rozciąganie, porowatość, grubość i morfologię różnych fragmentów włóknin wytworzonych przy użyciu kolektorów statycznych i dynamicznych. Zbadano wpływ sposobu działania kolektorów na właściwości otrzymanych włóknin. Zaobserwowano znaczącą niejednorodność właściwości włóknin wytworzonych przy użyciu kolektorów statycznych. Stwierdzono, że kolektory pracujące w trybie dynamicznym zmniejszają odchylenia właściwości pomiędzy różnymi sekcjami włóknin. Poprzez wybranie odpowiedniego sposobu działania kolektora, można uzyskać włókninę o pożądanej orientacji