Lignin-derived bio-based flame retardants toward high-performance sustainable polymeric materials

Synthesis of copper oxide nanoparticles with tunable size and desirable properties is a foremost thrust area of the biomedical research domain. Though these features primarily rely on the synthetic...

Synthesis and Biomedical Applications of Copper Oxide Nanoparticles: An Expanding Horizon.

Engineering nanostructures of CuO-based photocatalysts for water treatment: Current progress and future challenges

Multifunctional lignin-based nanocomposites and nanohybrids

At present, nanotechnology is a priority in research in several nations due to its massive capability and financial impact. However, due to the uncertainties and abnormalities in shape, size, and chemical compositions, the existence of certain nanomaterials may lead to dangerous effects on the human health and environment. The present review includes the different advanced applications of nanomaterials in textiles industries, as well as their associated environmental and health risks. The four main textile industry fields using nanomaterials, nanofinishing, nanocoatings, nanofibers, and nanocomposites, are analyzed. Different functional textiles with nanomaterials are also briefly reviewed. Most textile materials are in direct and prolonged contact with our skin. Hence, the influence of carcinogenic and toxic substances that are available in textiles must be comprehensively examined. Proper recognition of the conceivable benefits and accidental hazards of nanomaterials to our surroundings is significant for pursuing its development in the forthcoming years. The conclusions of the current paper are anticipated to increase awareness on the possible influence of nanomaterial-containing textile wastes and the significance of better regulations in regards to the ultimate disposal of these wastes.

https://www.mdpi.com/1996-1944/13/22/5134/pdf

Sustainable Use of Nanomaterials in Textiles and Their Environmental Impact.

Sodium lignin sulfonate (SLS) has been explored as a fire retardant finishing agent on cotton fabric. 30% [w/v] SLS treated cotton fabric has registered LOI value of 28.5 with minimum char length of 4 cm (self-extinguishment) whereas control cotton fabric was found to burn out with flame and afterglow within 1 min. Thermo-gravimetry of the treated cotton fabric showed 35% mass retention at 500 °C while only 8% char mass was left for the control cotton fabric at the said temperature. Volatile species liberated during burning were analyzed by GC–MS technique which demonstrated the restriction of flammable gas formation from the SLS treated fabric. Char mass left after burning also has been characterized in terms of its morphology, elemental analysis, etc. Moreover, it has also been proven that SLS treatment imparts a natural attractive yellow color, UV protective property to the treated fabric without altering physical strength of the fabric which can be considered as an added advantage over flame retardant effect.

Sodium lignin sulfonate: a bio-macromolecule for making fire retardant cotton fabric

For the first time, facile synthesized ZnCO3 nanoneedles have been integrated into cotton fabric at around neutral pH as well as alkaline treatment condition (using NaOH) by following padding method to obtain fire retardant efficacy of the fabric. Fire retardant properties of the treated fabrics were studied by measuring limiting oxygen index (LOI) and vertical burning test. It was found that the fabric treated with nano ZnCO3 in alkaline condition showed LOI value of 30 and a specific char length of 40 mm with more than 40% char mass retention at 600 °C. Degradation behavior of the control and the treated fabrics has also been revealed in detail by using Thermo-gravimetric and Differential Scanning Calorimetry analyzer. Char morphology and the interaction of the nanoneedles with the treated fabric also have been demonstrated by using SEM and FTIR analysis, respectively.

Synthesis of zinc carbonate nanoneedles, a potential flame retardant for cotton textiles

Morphology of different CuO nanostructures is controlled by changing the precursor counterions The CuO nanostructures were synthesized using three different precursor salts of copper namely acetate, nitrate, and sulfate via facile chemical precipitation route The synthesized CuO nanostructures were thoroughly characterized using X-ray diffraction, optical spectroscopy, electron microscopy etc The nanostructures were studied for catalytic nonenzymatic glucose sensing applications CuO nanostructures synthesized from copper sulfate having flower-like morphology showed the highest glucose sensitivity of 1830 μAmM−1cm−2 in a linear range of 001–02 mM with a detection limit of 8 μM

Facile One Pot Synthesis of CuO Nanostructures and Their Effect on Nonenzymatic Glucose Biosensing

In the present context, synthesized zinc borate was demonstrated as a thermal resistant agent by applying it by in-situ method on the cotton fabric wherein zinc borate was synthesized from zinc nitrate and borax. Particle formation and its morphology were confirmed by particle size analyzer, and scanning electron microscopy analysis, respectively. It has been observed that zinc borate-cotton registered the high oxygen index value of 30% against 18% oxygen index of the control cotton fabric. Furthermore, zinc borate treated cotton fabric showed a black colour char and a char length of 25 mm. The extent of heat generated from the treated cotton fabric was also found to be 75% less compared to the untreated cotton fabric. A thermo-oxidative decomposition experiment was performed by thermo-gravimetry analyzer and reported in detail. It was found that the treated fabric recorded more than 40% weight retention at a higher temperature. The surface morphology of the charred mass was also examined to fortify the dehydration mechanism of the treated sample.

Exploration of flame retardant efficacy of cellulosic fabric using in-situ synthesized zinc borate particles

In this study, environmentally benign calcium borate particles (sub-micron size) were synthesized by co-precipitation method and applied on cotton fabric to impart flame retardant property. Synthes...

Veerender Sharma

Papers

Sodium lignin sulfonate: a bio-macromolecule for making fire retardant cotton fabric

Synthesis of zinc carbonate nanoneedles, a potential flame retardant for cotton textiles

Facile One Pot Synthesis of CuO Nanostructures and Their Effect on Nonenzymatic Glucose Biosensing

Exploration of flame retardant efficacy of cellulosic fabric using in-situ synthesized zinc borate particles

Calcium Borate Particles: Synthesis and Application on the Cotton Fabric as an Emerging Fire Retardant