Due to the ever-growing demand for bast fibres for technical and garment textiles, complementary ... more Due to the ever-growing demand for bast fibres for technical and garment textiles, complementary sources to textile flax, whose cultivation in western Europe cannot really be extended, need to be proposed. In this study, the interest in harvesting and processing linseed flax straw is studied for geotextile applications. The main critical stages of fibre-to-yarn production for geotextiles were investigated. Different dew retting levels as well as different all-fibre extraction processes were investigated to achieve this objective. It was demonstrated that the fibres extracted from linseed flax stems subjected to 12 weeks of dew retting using breaking rollers, thresher and a breaking card exhibited the most suitable morphological and mechanical properties. The optimal fibres were converted into 100% linseed flax yarns using a flyer spinning machine, and the mechanical properties as well as the biodegradability of the linseed yarns were evaluated to understand their potential as geotex...
Antiviral textiles are one of the most promising areas of protective textiles. Antiviral textiles... more Antiviral textiles are one of the most promising areas of protective textiles. Antiviral textiles are important in the field of health and hygiene. They become an essential part of our daily-life when a pandemic situation arises. The present paper critically analyses and summarizes various researches of the production of antiviral textiles. Different classes of the virus, how the virus transmits and replicates, various antiviral agents for textiles and their working mechanism, and the application procedure of various synthesized and bio-based antiviral compounds on textiles have been discussed in this paper. Finally, the present paper compares the existing antiviral finishing on textiles in terms of its effectiveness, durability and skin-friendliness and, following that, discusses the possibilities of using antiviral textiles in various sectors.
Composites Part A: Applied Science and Manufacturing, 2022
Hemp is a sustainable source of natural fibres that can contribute to meet the increasing demand ... more Hemp is a sustainable source of natural fibres that can contribute to meet the increasing demand for technical applications in the textile and the composite sectors. Continuous reinforcements can be produced using the existing flax machinery, initially developed for textile purposes. To achieve competitive and economically viable fibre yields and a fibre quality suitable for secondary processing and composite application, hemp needs to be adequately selected and prepared and the flax machinery and settings have to be adapted to the hemp specificities. In this context, this paper studies the influence of agronomic features and processing stages and settings on the effective tensile properties of fibres extracted from two hemp varieties determined using impregnated fibre bundle tests. Results show that the effective properties of fibres are maintained and even improved during processing, in particular during the hackling and stretching steps. Hemp can achieve properties comparable to high quality long flax fibres.
Natural fibre reinforced thermoplastic composite materials are becoming very popular in the mater... more Natural fibre reinforced thermoplastic composite materials are becoming very popular in the material community due to several advantages of natural fibre and thermoplastic polymer. The demand of stronger and better composite than the existing ones is also increasing simultaneously with their growing popularity. However, natural fibre reinforced thermoplastics have some disadvantages associate with the poor fibre-matrix interaction, short length of the natural fibres and high melt viscosity of thermoplastic resins. All these factors decrease the ultimate mechanical properties of the natural fibre composites. However, the surface treatment of natural fibres, use of low twisted yarn and hybrid yarn during composite manufacturing significantly improve the mechanical properties of the natural fibre composites. The scope of all three approaches in determining composites mechanical properties have been reviewed here. Finally, the combined effects of interface and DREF spun hybrid yarn stru...
Comparing flax and hemp fibres yield and mechanical properties after scutching/hackling processin... more Comparing flax and hemp fibres yield and mechanical properties after scutching/hackling processing. (2021) Industrial Crops & Products, 172. 1-11.
Abstract Resistance to impact thrust is one of the most important requirement along with many oth... more Abstract Resistance to impact thrust is one of the most important requirement along with many others for defining suitable applications of any composite materials. In this present work, the influence of composite architecture and composite interfacial bonding strength on the impact performance of flax reinforced PP composites have been investigated. In this regard two different composite architecture through conventional film stacking method and through DREF (DR. E. Fehrer open-end friction spinning process) yarn consolidation method have been produced and to alter the fibre–matrix interfacial bonding the flax fibres are treated with MAgPP (Maleic Anhydride grafted Polypropylene). Finally, the notch Izod impact behaviour of all composite samples are evaluated and compared.
Natural fibre reinforced thermoplastic composite materials are becoming very popular in the mater... more Natural fibre reinforced thermoplastic composite materials are becoming very popular in the material community due to several advantages of natural fibre and thermoplastic polymer. The demand of stronger and better composite than the existing ones is also increasing simultaneously with their growing popularity. However, natural fibre reinforced thermoplastics have some disadvantages associate with the poor fibre-matrix interaction, short length of the natural fibres and high melt viscosity of thermoplastic resins. All these factors decrease the ultimate mechanical properties of the natural fibre composites. However, the surface treatment of natural fibres, use of low twisted yarn and hybrid yarn during composite manufacturing significantly improve the mechanical properties of the natural fibre composites. The scope of all three approaches in determining composites mechanical properties have been reviewed here. Finally, the combined effects of interface and DREF spun hybrid yarn structure on the tensile and flexural properties of flax-PP based unidirectional composite specimen have been discussed in this chapter.
Antiviral textiles are one of the most promising areas of protective textiles. Antiviral textiles... more Antiviral textiles are one of the most promising areas of protective textiles. Antiviral textiles are important in the field of health and hygiene. They become an essential part of our daily-life when a pandemic situation arises. The present paper critically analyses and summarizes various researches of the production of antiviral textiles. Different classes of the virus, how the virus transmits and replicates, various antiviral agents for textiles and their working mechanism, and the application procedure of various synthesized and bio-based antiviral compounds on textiles have been discussed in this paper. Finally, the present paper compares the existing antiviral finishing on textiles in terms of its effectiveness, durability and skin-friendliness and, following that, discusses the possibilities of using antiviral textiles in various sectors.
In the current context of environmental contamination due to disposal of textile-manufacturing wa... more In the current context of environmental contamination due to disposal of textile-manufacturing waste, substitution of synthetic dyes and chemicals with bio-colour or bio-extract is a big confront. Thus, the need of the hour is to develop green chemicals or dyes for sustainable textile processing with an eco-friendly approach. In light of above, a bio-colour has been extracted from Bauhinia vahlii bark and applied on the degummed and bleached silk fabric along with a bioacid (citric acid). Dyed silk fabrics were tested for their color strength and fastness properties like color fastness to washing, water crocking and light and found satisfactory results. Banana peduncle extract (BPE) is also applied on the dyed fabric to improve the fastness properties and enhance the functional properties like flame retardant by pad-dry-cure method. Dyed and BPE treated silk fabric was tested and analysed for their color fastness properties and mechanical properties, like thickness, bending length, flexural rigidity and crease recovery and the results were recorded. Notably, evaluation of dyed and BPE treated silk fabric was carried out for flame retardancy according to ASTM D1230 standards and promising result was obtained.
Recycling of thermoplastic composites has drawn a considerable attention in the recent years. How... more Recycling of thermoplastic composites has drawn a considerable attention in the recent years. However, the main issue with recycled composites is their inferior mechanical properties compared to the virgin ones. In this present study, an alternative route to the traditional mechanical recycling technique of thermoplastic composites has been investigated with the view to increase mechanical properties of the recycled parts. In this regard, the glass/polypropylene laminate offcuts are cut in different grain sizes and processed in bulk form, using compression moulding. Further, the effect of different grain sizes (i.e., different lengths, widths and thicknesses) and other process-related parameters (such as mould coverage) on the tensile properties of recycled aggregate-reinforced composites have been investigated. The tensile properties of all composite samples are tested according to ISO 527-4 test method and the significance of test results is evaluated according to Student’s t-test...
Due to the ever-growing demand for bast fibres for technical and garment textiles, complementary ... more Due to the ever-growing demand for bast fibres for technical and garment textiles, complementary sources to textile flax, whose cultivation in western Europe cannot really be extended, need to be proposed. In this study, the interest in harvesting and processing linseed flax straw is studied for geotextile applications. The main critical stages of fibre-to-yarn production for geotextiles were investigated. Different dew retting levels as well as different all-fibre extraction processes were investigated to achieve this objective. It was demonstrated that the fibres extracted from linseed flax stems subjected to 12 weeks of dew retting using breaking rollers, thresher and a breaking card exhibited the most suitable morphological and mechanical properties. The optimal fibres were converted into 100% linseed flax yarns using a flyer spinning machine, and the mechanical properties as well as the biodegradability of the linseed yarns were evaluated to understand their potential as geotex...
Antiviral textiles are one of the most promising areas of protective textiles. Antiviral textiles... more Antiviral textiles are one of the most promising areas of protective textiles. Antiviral textiles are important in the field of health and hygiene. They become an essential part of our daily-life when a pandemic situation arises. The present paper critically analyses and summarizes various researches of the production of antiviral textiles. Different classes of the virus, how the virus transmits and replicates, various antiviral agents for textiles and their working mechanism, and the application procedure of various synthesized and bio-based antiviral compounds on textiles have been discussed in this paper. Finally, the present paper compares the existing antiviral finishing on textiles in terms of its effectiveness, durability and skin-friendliness and, following that, discusses the possibilities of using antiviral textiles in various sectors.
Composites Part A: Applied Science and Manufacturing, 2022
Hemp is a sustainable source of natural fibres that can contribute to meet the increasing demand ... more Hemp is a sustainable source of natural fibres that can contribute to meet the increasing demand for technical applications in the textile and the composite sectors. Continuous reinforcements can be produced using the existing flax machinery, initially developed for textile purposes. To achieve competitive and economically viable fibre yields and a fibre quality suitable for secondary processing and composite application, hemp needs to be adequately selected and prepared and the flax machinery and settings have to be adapted to the hemp specificities. In this context, this paper studies the influence of agronomic features and processing stages and settings on the effective tensile properties of fibres extracted from two hemp varieties determined using impregnated fibre bundle tests. Results show that the effective properties of fibres are maintained and even improved during processing, in particular during the hackling and stretching steps. Hemp can achieve properties comparable to high quality long flax fibres.
Natural fibre reinforced thermoplastic composite materials are becoming very popular in the mater... more Natural fibre reinforced thermoplastic composite materials are becoming very popular in the material community due to several advantages of natural fibre and thermoplastic polymer. The demand of stronger and better composite than the existing ones is also increasing simultaneously with their growing popularity. However, natural fibre reinforced thermoplastics have some disadvantages associate with the poor fibre-matrix interaction, short length of the natural fibres and high melt viscosity of thermoplastic resins. All these factors decrease the ultimate mechanical properties of the natural fibre composites. However, the surface treatment of natural fibres, use of low twisted yarn and hybrid yarn during composite manufacturing significantly improve the mechanical properties of the natural fibre composites. The scope of all three approaches in determining composites mechanical properties have been reviewed here. Finally, the combined effects of interface and DREF spun hybrid yarn stru...
Comparing flax and hemp fibres yield and mechanical properties after scutching/hackling processin... more Comparing flax and hemp fibres yield and mechanical properties after scutching/hackling processing. (2021) Industrial Crops & Products, 172. 1-11.
Abstract Resistance to impact thrust is one of the most important requirement along with many oth... more Abstract Resistance to impact thrust is one of the most important requirement along with many others for defining suitable applications of any composite materials. In this present work, the influence of composite architecture and composite interfacial bonding strength on the impact performance of flax reinforced PP composites have been investigated. In this regard two different composite architecture through conventional film stacking method and through DREF (DR. E. Fehrer open-end friction spinning process) yarn consolidation method have been produced and to alter the fibre–matrix interfacial bonding the flax fibres are treated with MAgPP (Maleic Anhydride grafted Polypropylene). Finally, the notch Izod impact behaviour of all composite samples are evaluated and compared.
Natural fibre reinforced thermoplastic composite materials are becoming very popular in the mater... more Natural fibre reinforced thermoplastic composite materials are becoming very popular in the material community due to several advantages of natural fibre and thermoplastic polymer. The demand of stronger and better composite than the existing ones is also increasing simultaneously with their growing popularity. However, natural fibre reinforced thermoplastics have some disadvantages associate with the poor fibre-matrix interaction, short length of the natural fibres and high melt viscosity of thermoplastic resins. All these factors decrease the ultimate mechanical properties of the natural fibre composites. However, the surface treatment of natural fibres, use of low twisted yarn and hybrid yarn during composite manufacturing significantly improve the mechanical properties of the natural fibre composites. The scope of all three approaches in determining composites mechanical properties have been reviewed here. Finally, the combined effects of interface and DREF spun hybrid yarn structure on the tensile and flexural properties of flax-PP based unidirectional composite specimen have been discussed in this chapter.
Antiviral textiles are one of the most promising areas of protective textiles. Antiviral textiles... more Antiviral textiles are one of the most promising areas of protective textiles. Antiviral textiles are important in the field of health and hygiene. They become an essential part of our daily-life when a pandemic situation arises. The present paper critically analyses and summarizes various researches of the production of antiviral textiles. Different classes of the virus, how the virus transmits and replicates, various antiviral agents for textiles and their working mechanism, and the application procedure of various synthesized and bio-based antiviral compounds on textiles have been discussed in this paper. Finally, the present paper compares the existing antiviral finishing on textiles in terms of its effectiveness, durability and skin-friendliness and, following that, discusses the possibilities of using antiviral textiles in various sectors.
In the current context of environmental contamination due to disposal of textile-manufacturing wa... more In the current context of environmental contamination due to disposal of textile-manufacturing waste, substitution of synthetic dyes and chemicals with bio-colour or bio-extract is a big confront. Thus, the need of the hour is to develop green chemicals or dyes for sustainable textile processing with an eco-friendly approach. In light of above, a bio-colour has been extracted from Bauhinia vahlii bark and applied on the degummed and bleached silk fabric along with a bioacid (citric acid). Dyed silk fabrics were tested for their color strength and fastness properties like color fastness to washing, water crocking and light and found satisfactory results. Banana peduncle extract (BPE) is also applied on the dyed fabric to improve the fastness properties and enhance the functional properties like flame retardant by pad-dry-cure method. Dyed and BPE treated silk fabric was tested and analysed for their color fastness properties and mechanical properties, like thickness, bending length, flexural rigidity and crease recovery and the results were recorded. Notably, evaluation of dyed and BPE treated silk fabric was carried out for flame retardancy according to ASTM D1230 standards and promising result was obtained.
Recycling of thermoplastic composites has drawn a considerable attention in the recent years. How... more Recycling of thermoplastic composites has drawn a considerable attention in the recent years. However, the main issue with recycled composites is their inferior mechanical properties compared to the virgin ones. In this present study, an alternative route to the traditional mechanical recycling technique of thermoplastic composites has been investigated with the view to increase mechanical properties of the recycled parts. In this regard, the glass/polypropylene laminate offcuts are cut in different grain sizes and processed in bulk form, using compression moulding. Further, the effect of different grain sizes (i.e., different lengths, widths and thicknesses) and other process-related parameters (such as mould coverage) on the tensile properties of recycled aggregate-reinforced composites have been investigated. The tensile properties of all composite samples are tested according to ISO 527-4 test method and the significance of test results is evaluated according to Student’s t-test...
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