Multifunctional modification of cotton using layer-by-layer finishing with chitosan, sodium lignin sulphonate and boric acid.

Functionally modified fabrics produced using sustainable techniques are in huge demand in today's world. In the present work, cotton fabric was modified using layer-by-layer two-stage finishing method using a solution of chitosan in citric acid (CS) and sodium lignin sulphonate (SLS) with boric acid (BA), thus granting several performance traits like wrinkle-free, antibacterial, flame retardant, UV protection and antioxidant properties. The finished fabric was evaluated for several textile properties like tensile strength, bending length, crease recovery, whiteness index and functional properties like antibacterial activity, UV protection, flame retardancy and antioxidant properties under standard conditions. The finished cotton showed an increase in CRA, antibacterial activity in the range 70-89%, UPF in the excellent range, much higher LOI values with a decrease in heat release and antioxidant activity of higher than 93%. The novel method of multifunctional finishing of cotton by layer-by-layer technique is explored.

Development of multifunctional linen fabric using chitosan film as a template for immobilization of in-situ generated CeO2 nanoparticles.

Linen fabric lacks functional properties which can be imparted using CeO2 nanoparticles; however, the efficiency and durability against the repeated washing is always a big limitation. Wash-durable functionalization thus can be achieved by surface modification using chitosan-based recipes which can also impart additional functional properties to linen. In the present work, the modification of linen fabric was achieved using a chitosan-based recipe followed by in-situ synthesis of CeO2 nanoparticles on chitosan-treated fabrics. The modified fabric was characterized using FTIR, TGA, SEM and EDX techniques and further evaluated towards functional properties. The modified linen displayed highly effective antibacterial activity against S. aureus and E. coli bacteria. The additional functional properties like wrinkle resistance, UV protection and flame retardancy were also achieved using such dual modification. Most of the functional properties were retained in a satisfactory level after five subsequent washes. The modified linen thus can be claimed as a suitable candidate for functional apparels and technical textiles.

Multifunctional modification of linen fabric using chitosan-based formulations.

Chitosan is a new-age functional biopolymer which can be utilized for functional finishing of cellulose-based textile materials. In the current work, linen fabric was modified using two-stage finishing using chitosan-citric acid and phytic acid-thiourea thus imparting multiple performance characteristics such as wrinkle-free, antibacterial, flame retardant and antioxidant properties. The multifunctional linen fabrics were characterized using FTIR, TGA, SEM and EDX analysis. The fabrics were evaluated for textile properties like tensile strength, bending length, yellowness index, absorbency and functional properties like crease recovery angle, antibacterial activity, UV protection, flame retardancy and antioxidant properties. The durability of functional properties was also evaluated. The finished linen fabric displayed efficient multifunctional properties which were retained to a moderate level till 20 washes.