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Calcinated tea and cellulose composite films and its dielectric and lead adsorption properties
Jayaramudu, Tippabattini,Varaprasad, Kokkarachedu,Kim, Hyun Chan,Kafy, Abdullahil,Kim, Jung Woong,Kim, Jaehwan Applied Science Publishers 2017 Carbohydrate polymers Vol.171 No.-
<P><B>Abstract</B></P> <P>In this paper, calcinated tea and cellulose composite (CTCC) films were fabricated via solution casting method. Chemical structure, morphology, crystallinity and thermal stability of the fabricated films were characterized by using Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction and thermogravimetric analysis. The effect of calcinated tea loading on the properties of the prepared CTCC films was studied. The results suggest that the prepared CTCC films show higher mechanical properties, thermal stability and dielectric constant than the neat cellulose film. In addition, the CTCC films adsorb Pb<SUP>2+</SUP> ions and its adsorption performance depends on the calcinated tea content and pH level. The CTCC films are useful for sensors, flexible capacitor as well as lead adsorption applications.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Calcinated tea based cellulose composite (CTCC) film was prepared by blending method. </LI> <LI> The CTCC film shows 4 times higher dielectric constant than the pure cellulose. </LI> <LI> The CTCC film demonstrates lead adsorption, depending on the CT content and pH. </LI> <LI> The CTCC film is useful for sensor, flexible capacitor and metal adsorption. </LI> </UL> </P>
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Chandrasekaran Karthikeyan,Kokkarachedu Varaprasad,Sungjun Kim,Ashok Kumar Jangid,Wonjeong Lee,Abdulrahman Syedahamed Haja Hameed,Kyobum Kim 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.123 No.-
The new development of inorganic (IO) nanoparticle (NPs)-based nanomedicines in anticancer therapy isan active area of research. The cellular uptake of IO NPs plays a crucial role in their efficacy as anticanceragents. In this case, IO NPs cellular uptake depends on physical and chemical parameters, including size,shape, and surface modification of the nanoparticles. From the cellular uptake, one of the essentialparameters for small size plays a critical role in the NPs’ due to their ability to passively diffuse acrossthe cell membrane or enter cells through endocytosis. In this study, the inorganic SnO2 (tin dioxide)and SA (sodium alginate) were made into SnO2 (SASnO2) using a simple one-pot green method. Biomedical studies have shown that SASnO2 NPs exhibit greater antibacterial, antioxidant, and anticancerproperties than SnO2 NPs. The prepared SnO2 and SASnO2 NPs were tested against breast cancer cells inanticancer studies. In cellular uptake studies, the smaller size of SASnO2 NPs (19 nm) resulted in highercellular uptake compared to SnO2 NPs (38 nm). The larger surface area of these SASnO2 NPs allows formore contact with biological membranes and internalization (cell uptake) by cancer cells, resulting inenhanced anticancer therapy when using SASnO2 NPs.
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