Unprecedented Influence of Carbon Dot@TiO₂ Nanohybrid on Multifaceted Attributes of Waterborne Hyperbranched Polyester Nanocomposite

Abstract

Herein, we wish to report fabrication of multifaceted environmentally friendly benign renewable resource-based waterborne hyperbranched polyester nanocomposites using three different doses of carbon dot@TiO 2 nanohybrid through a facile in situ polymerization technique in the absence of solvent or additional catalyst. Carbon dot@TiO 2 nanohybrid was prepared through a greener one-pot hydrothermal process from bio-based raw materials. The nanocomposites were characterized by different instrumental techniques. The thermosets of these nanocomposites are obtained by curing them with glycerol-based hyperbranched epoxy and fatty acid-based poly(amido amine). Enhancements of 6.67 folds tensile strength, 3.8 folds toughness, 1.7 folds Young’s modulus, >2.5 units gloss, and 46 °C thermal stability were observed for the thermosets by the formation of nanocomposites. The nanocomposites also showed antifogging and anti-icing properties. More interestingly, they can also be used for efficient separation of crude oil and water from their mixture. Thus, these environmentally benign polymeric materials could find applications in different fields.

Photoluminescence, Self cleaning and Photocatalytic Behavior of Waterborne Hyperbranched Polyester/Carbon dot@TiO2 Nanocomposite

“…In this milieu, CD with polar functional groups not only helps to stabilize TiO 2 nanoparticles but also improves compatibility with organic polymer through different interactions, as supported by FTIR spectral analysis. [10,24] The shifting of stretching mode of TiÀO bond (681 cm À1 ) as well as -OÀH stretching (3400 cm À1 ) and bending (1400 cm À1 ) absorption bands of TiO 2 confirmed the interaction of CD with TiO 2 . Further, shifting of -OÀH absorption band (3500 cm À1 ) and -C=O stretching band (1760 cm À1 ) in the nanocomposite confirmed the interaction of the nanohybrid with the polyester matrix .…”

“…This property is commonly studied for polymeric materials with TiO 2 where compatibility poses a question. In this milieu, CD with polar functional groups not only helps to stabilize TiO 2 nanoparticles but also improves compatibility with organic polymer through different interactions, as supported by FTIR spectral analysis ,. The shifting of stretching mode of Ti−O bond (681 cm −1 ) as well as ‐O−H stretching (3400 cm −1 ) and bending (1400 cm −1 ) absorption bands of TiO 2 confirmed the interaction of CD with TiO 2 .…”

“…Further, shifting of -OÀH absorption band (3500 cm À1 ) and -C=O stretching band (1760 cm À1 ) in the nanocomposite confirmed the interaction of the nanohybrid with the polyester matrix . [10,24] The antireflectance property of the nanocomposite was obtained from the transmittance value as measured by UV-vis spectra (Figure 3B). From this figure, it is seen that the light percentage transmittance (%T) of the nanocomposites coated glass slide is higher than uncoated glass slide.…”

Photocatalytic Simultaneous Removal of Nitrite and Ammonia via a Zinc Ferrite/Activated Carbon Hybrid Catalyst under UV–Visible Irradiation

“…Therefore, AC improved the adsorption of NN and AN and harvesting of incident light of λ > 530 nm wavelength, resulting in the enhanced photocatalytic activity. 51,52…”

Sustainable Polymeric Nanocomposites for Multifaceted Advanced Applications

“…Examples of such hybrid nanomaterials include Fe 3 O 4 /graphene that shows excellent magnetic property, CQD/TiO 2 with outstanding photocatalytic activity, HAp/graphene that shows osteogenetic activity, and many more [53]. Hazarika and Karak [54] prepared CDs@TiO 2 nanohybrid through a facile and greener one-pot hydrothermal protocol and incorporated into waterborne hyperbranched polyester through in situ polymerization technique without using any solvent and compatibilizing agent. Fe 3 O 4 /CNT (electromagnetic shielding material) and Pt/CeO 2 /graphene (electrochemical application) are some of the recent examples [55].…”