The current study is aimed to explore the sustainable dyeing approach of silk fabric with turmeric powder using tannin as mordant extracted from tamarind seed coat. For that, tamarind seed coat tannin was extracted and applied as natural mordant alone and in combination with metal mordant namely copper sulphate for dyeing silk fabric with the extract of turmeric powder. Dyeing parameters such as temperature, time and mordant concentration were varying for optimizing the process. The color strength, color coordinates, color fastness to wash, perspiration, water and rubbing were evaluated for examining dyeing performance. Firstly, tannin was extracted from tamarind seed coat and applying on the silk fabric at 95˚C temperature for 45 min by varying concentration. Among them 15 g/l shows better results. Some samples were mordanted with both 15 g/l extracted tannin and 0.5% copper sulphate solution. The mordanted samples were dyed with turmeric dye by varying the time and temperature. By analyzing the test results, the sample mordanted with extracted tannin showed high color strength and good fastness properties dyeing at 80˚C for 60 min. The application of 0.5% copper sulphate mordant enhanced sustainable wash fastness properties.

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This research work aims to fabricate bamboo fabric reinforced polyester composites (BFRPCs) and investigate the mechanical and degradation properties of BFRPCs. Composite samples were prepared using hand lay-up technique. Bamboo fabric was used as reinforcement material, unsaturated polyester resin (UPR) was used as matrix and Methyl ethyl ketone peroxide (MEKP) was used as initiator which was employed as 0.5, 1, 2, 3 and 4% concentration. The mechanical properties of the BFRPC samples such as tensile strength (TS), tensile modulus (TM), bending strength (BS), bending modulus (BM) and impact strength (IS) were conducted. The degradation behaviors of the composites in soil burial, immersed in alkaline water and saline water were also evaluated. The BFRPC sample with 2 (%) MEKP concentration showed better tensile properties with TS and TM values of 39 MPa and 744 MPa respectively. For the 1 (%) MEKP concentration, the maximum values of BS, BM and IS were found to be 62.8 MPa, 1229 MPa and 25.7 kJ/m2 respectively. In the case of soil burial degradation the BFRPC sample with 1 (%) MEKP concentration shows better performance against loss of TS. No significant effect was found on the alkaline and saline water degradation properties of BFPRC for the variation of MEKP concentration. With the increase of all types of degradation time, decrease the tensile strength of all BFRPC samples.

Exploration on hydrogel fibres concerning about smart based application in the medical sector has stimulated great interests for the last couple of years due to its wide range of purposes that include actuators, artificial adhesives, transplantable tissue organs, cell scaffolds, cell therapeutics, wound healing, cartilage or bone regeneration. Nevertheless, recently hydrogel fibre based biomaterials have drawn great concentration for use in a wide variety of biomedical applications like the sustained release of drugs. This is due to the fact that, hydrogel fibers are biocompatible and their similarity about physical properties is in relation with natural tissue. This review article prescribes about the application of hydrogels with diversified prospects in tissue engineering, wound care dressings, soft tissue recovery and plastic surgery. As the products of hydrogels are composed with a group of polymeric materials, the hydrophilic network structure makes them competent for holding an immense quantity of water in their three-dimensional polymer network structure. A wide-ranging application of these products in modern industrial and environmental areas has already taken into account to be of prime importance. Inevitably, natural hydrogels right is now gradually replaced by synthetic types due to their larger amount of water absorption capacity, durability alongside with wide ranges of raw chemical resources.

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