@conference {44414, title = {Studies on use of sodium poly acrylate (SPA) for low salt animal skinpreservation}, booktitle = { IULTCS CONGRESS 2017}, year = {2017}, month = {FEB}, publisher = {Central Leather Research Institute}, organization = {Central Leather Research Institute}, address = { ITC CHOLA , CHENNAI}, abstract = {In this study, commercial sodium poly acrylate (SPA) is used along with sodium chloride for low salt skin preservation. SPA is a super-absorbent polymer which can absorb water many times of its own weight.}, author = {Sandhya, K. V. and Brindha, Velappan and Abinandan, Sudharsanam and Vedaraman, N. and John, Sundar V. and Suresha, P. R. and Badiger, Manohar and Chinnaraj, Velappan kandukalpatti and Muralidharan, C.} } @article {46973, title = {One-pot synthesis of bimodal (macro-meso, micro-mesoporous) silica by polyHIPE: parameter studies}, journal = {Journal of Porous Materials}, volume = {27}, year = {2020}, month = {FEB}, pages = {263-275}, type = {Article}, abstract = {

Porous silica with hierarchical organization of pore structure is desired for a variety of applications such as, chromatography, sensing, control release, scaffold for biomedical applications and catalysis. Highly porous polymers obtained from high internal phase emulsion (HIPE) templating route have attracted increasing attention of researchers due to their hierarchical porous and interconnected structure with high porosity and low density. The novel method adopted in our approach combines redox initiated polymerization using HIPE polymerization and an in-situ sol-gel processing technique followed by calcination to obtain highly porous materials. The obtained materials have reminiscent of polyHIPE morphology containing pores and interconnected pore throats in micrometer size range with mesopores on the wall of macropores. The effect of concentration of TEOS, volume of dispersed phase, crosslinker concentration, shear rate and surfactant concentration as well as variation in calcination temperatures on the properties of silica materials were examined.

}, keywords = {Mesoporous material, PolyHIPE, Polymer-silica hybrid, Porous silica}, issn = {1380-2224}, doi = {10.1007/s10934-019-00807-w}, author = {Wale, Apparav and Nalawade, Archana and Ponrathnam, Surendra and Rajan, C. R. and Badiger, Manohar} } @article {47575, title = {Mechanical and microstructural studies in a polysaccharide-acrylate double network hydrogel}, journal = {Journal of the Mechanical Behavior of Biomedical Materials}, volume = {124}, year = {2021}, month = {DEC}, pages = {104839}, type = {Article}, abstract = {Polymeric hydrogels continue to find a wide range of applications. However, a major drawback of hydrogels is the lack of mechanical strength. In this regard, {\textquoteleft}{\textquoteleft}Double Network Hydrogels{\textquoteright}{\textquoteright} (DN) have shown great promise recently. The toughness in DN hydrogels originates from the synergistic effect of two polymeric networks. In this work, we have synthesized a DN hydrogel consisting of a tightly cross linked carboxymethylcellulose (CMC) as the first network and loosely cross linked poly(hydroxyethylacrylate) (PHEA) as a second network (CMC-PHEADN). The required flexibility in the second network (PHEA) was induced by the presence of a small amount of stearyl methacrylate (SM) as a co-monomer in hydroxyl ethyl acrylate (HEA). The compressive strength of the CMC-PEHA-DN hydrogel was found to be 280 times more than that of CMC-SN hydrogel, and the presence of SM in DN hydrogels showed better recovery after deformation. Cell viability studies showed the biocompatibility of DN hydrogels. The micro-structural analysis of DN xerogels by 3D X-ray Microtomography indicated the presence of oriented pores in size range of 30-40 mu m. To the best of our knowledge, Microtomography was used for the first time to study the DN gels. These hydrogels can be used to develop implants that can withstand prolonged stress and expand the life span of implants.}, keywords = {Carboxymethyl cellulose, Double network hydrogels, Poly(hydroxyethyl acrylate), Poly(hydroxyethyl-co-stearyl methacrylate)}, issn = {1751-6161}, doi = {10.1016/j.jmbbm.2021.104839}, author = {Torris, Arun and Nair, Sanoop and Mol, K. P. Raji and Sengupta, Poulomi and Badiger, Manohar} } @article {49444, title = {Silver nanoparticles in electrospun ethyl hydroxy ethyl cellulose-PVA Nanofiber: synthesis, characterization and wound dressing applications}, journal = {Carbohydrate Polymer Technologies and Applications}, volume = {7}, year = {2024}, month = {JUN}, pages = {100477}, type = {Article}, abstract = {

Electrospinning is a simple, cost-effective technique and a reproducible process for both synthetic and\ natural polymers. It is found to be an attractive tool for various applications in biomedical engineering, filtration, protective clothing, catalysis reactions and sensors. Non-ionic cellulose ethers namely Ethyl Hydroxy\ Ethyl Cellulose\ (EHEC) is an important\ polysaccharide\ which is non-toxic, biocompatible and biodegradable and finds applications as thickening/rheology control agents in paints, cosmetics, detergents, oil recovery and also in the biomedical area. Poly (vinyl alcohol) (PVA) is a semi-crystalline\ hydrophilic polymer\ which is highly biocompatible and non-toxic having good thermal and mechanical properties and also high water solubility. Silver shows powerful antimicrobial activity and is non-toxic. It has been used to cure severe burns and chronic ulcers for many decades and is extensively used as an additive in various fields like prostheses, burn treatment, catheters, vascular grafts, dental resin components, ion exchange fibers,\ stainless steel\ materials, human skin and coating of\ medical devices. In the present work, EHEC/PVA\ nanofibers\ embedded with silver\ nanoparticles\ (AgNPs) are studied for their\ antibacterial activity\ using both gram positive and\ gram negative bacteria. The\ nanofibers\ show increase in\ tensile properties\ with the addition of silver nano-particles. The\ AgNPs\ embedded EHEC/PVA nanofiber mats having 0.5\% AgNPs were found to enhance the\ wound healing\ with no scar formation in\ wistar rats. The biological\ in-vitro\ and\ in-vivo\ studies support the potential of EHEC based\ nanofibers\ as excellent bio-materials for the treatment of severe burns and\ wounds. To the best of our knowledge, this is the first report on the electrospinning of EHEC/PVA nanofibers for wound healing applications.

}, doi = {https://doi.org/10.1016/j.carpta.2024.100477}, author = {Wali, Ashwini and Gorain, Mahadeo and Kundu, Gopal and Badiger, Manohar} }