Browsing by Author "Bandyopadhyay, S."

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Advances in Polymer Materials and Technology
(CRC Press, 2016) Srinivasan, A.; Bandyopadhyay, S.
This book covers recent advancements in the field of polymer science and technology. Frontiers areas, such as polymers based on bio-sources, polymer based ferroelectrics, polymer nanocomposites for capacitors, food packaging and electronic packaging, piezoelectric sensors, polymers from renewable resources, superhydrophobic materials and electrospinning are topics of discussion. The contributors to this book are expert researchers from various academic institutes and industries from around the world. Â© 2017 by Taylor and Francis Group, LLC.
Fly Ash-Based Polymer Matrix Composites
(CRC Press, 2016) Patil, A.G.; Srinivasan, A.; Bandyopadhyay, S.
One can consider plastics as nonrenewable materials, as many of the widely used ones are derived from petroleum and hold up to 95% of the market share. e ecacy of plastic consumption can be reduced in many cases by adding inexpensive llers, which contribute to the volume of the nal product, at the same time providing the adequate strength to the product for intended use. Another way of reducing the usage of plastics to a large extent is by adding nano/microsized reinforcements (sometimes referred to as llers) to the polymer matrix through which the several properties of the matrix can be controlled meticulously. By doing so, these materials can outperform the conventional pristine plastics with a lower consumption rate. For instance, addition of layered llers to polyethylene terephthalate (PET) improves the gas barrier properties and strength; therefore, the thickness of the PET bottles can be reduced to meet the barrier properties of the current requirements compared with the pure PET. © 2017 by Taylor and Francis Group, LLC.
Tunable adhesion and slip on a bio-mimetic sticky soft surface
(2019) Bandyopadhyay, S.; Sriram, S.M.; Parihar, V.; Das, Gupta, S.; Mukherjee, R.; Chakraborty, S.
Simultaneous tuning of wettability and adhesion of a surface requires intricate procedures for altering the interfacial structures. Here, we present a simple method for preparing a stable slippery surface, with an intrinsic capability of varying its adhesion characteristics. Cross-linked PDMS, an inherent hydrophobic material commonly used for microfluidic applications, is used to replicate the structures on the surface of a rose petal which acts as a high adhesion solid base and is subsequently oleoplaned with silicone oil. Our results demonstrate that the complex hierarchical rose petal structures can arrest dewetting of the silicone oil on the cross linked PDMS base by anchoring the oil film strongly even under flow. Further, by tuning the extent of submergence of the rose petal structures with silicone oil, we could alter the adhesion characteristics of the surface on demand, while retaining its slippery characteristics for a wide range of the pertinent parameters. We have also demonstrated the possible fabrication of gradient adhesion surfaces. This, in turn, may find a wide variety of applications in water harvesting, droplet maneuverability and no-loss transportation in resource-limited settings. � 2019 The Royal Society of Chemistry.
Tunable adhesion and slip on a bio-mimetic sticky soft surface
(Royal Society of Chemistry, 2019) Bandyopadhyay, S.; Sriram, S.M.; Parihar, V.; das Gupta, S.; Mukherjee, R.; Chakraborty, S.
Simultaneous tuning of wettability and adhesion of a surface requires intricate procedures for altering the interfacial structures. Here, we present a simple method for preparing a stable slippery surface, with an intrinsic capability of varying its adhesion characteristics. Cross-linked PDMS, an inherent hydrophobic material commonly used for microfluidic applications, is used to replicate the structures on the surface of a rose petal which acts as a high adhesion solid base and is subsequently oleoplaned with silicone oil. Our results demonstrate that the complex hierarchical rose petal structures can arrest dewetting of the silicone oil on the cross linked PDMS base by anchoring the oil film strongly even under flow. Further, by tuning the extent of submergence of the rose petal structures with silicone oil, we could alter the adhesion characteristics of the surface on demand, while retaining its slippery characteristics for a wide range of the pertinent parameters. We have also demonstrated the possible fabrication of gradient adhesion surfaces. This, in turn, may find a wide variety of applications in water harvesting, droplet maneuverability and no-loss transportation in resource-limited settings. © 2019 The Royal Society of Chemistry.