High performance luminescent thermosetting waterborne hyperbranched polyurethane/carbon quantum dot nanocomposite with in vitro cytocompatibility

Gogoi, Satyabrat; Kumar, Manishekhar; Mandal, Biman B.; Karak, Niranjan

doi:10.1016/j.compscitech.2015.08.010

Cited by 70 publications

(65 citation statements)

References 33 publications

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“…Also with the increase of CD concentration a huge amount of light is reflected from the smooth surface, as a result gloss values increase. 21,30 These results show that high gloss is also possible to obtain by proper designing of waterborne system.…”

Section: Optical Propertiesmentioning

confidence: 76%

Biodegradable tough waterborne hyperbranched polyester/carbon dot nanocomposite: approach towards an eco-friendly material

Hazarika

Karak

2016

Green Chem.

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In this study, environmentally friendly waterborne hyperbranched polyester/carbon dot (CD) nanocomposites were fabricated by in situ polymerization through a facile and greener route in absence of catalyst, solvent and neutralizing agent. Three nanocomposites were prepared at different loadings of CD (0.1, 0.5 and 1 wt %). CD was prepared from citric acid and glycerol in presence of cost free cow urine through a one step greener method. The structural attributes of the nanocomposites were evaluated by transmission electron microscopy, X-ray diffraction, Fourier transform infrared and UV-visible spectroscopic studies. The thermosets were obtained by curing the polyester nanocomposite with glycerol based hyperbranched epoxy and fatty acid based poly(amido amine) hardener. The nanocomposites exhibited excellent wavelength dependent down-and up-conversion fluorescence properties. The significant improvements in mechanical properties like tensile strength (7.8 -47 MPa), Young's modulus (243 -745 MPa), toughness (17.82 -51.1 MJm -3 ) and scratch hardness (4 -10 kg) were observed for the thermosetting nanocomposites. Thermogravimetrc analysis supports high thermostability (234 -265 °C) while differential scanning calorimetry authenticated glass transition temperature in the range of 49-56 °C. The rheological study demonstrated shear thining behaviour. The nanocomposite films exhibited good transparency in the visible range. Further, thermosetting nanocomposites were found to be highly biodegradable by Bacillus subtilis and Pseudomonas aeruginosa bacterial strains. The nanocomposite also possesses efficient self-cleaning ability as observed by photodegradation of formaldehyde (within 7 h) and methylene blue (80 min) under exposure of normal sunlight. Thus, this nanocomposite could be used as a promising eco-friendly material for advanced applications.

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Section: Optical Propertiesmentioning

confidence: 76%

Biodegradable tough waterborne hyperbranched polyester/carbon dot nanocomposite: approach towards an eco-friendly material

Hazarika

Karak

2016

Green Chem.

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“…The enhanced performance of the hybrid has been attributed to a dual mechanism by activation of BMP signaling pathway as well as internalization into the osteoblast cells (facilitating the expression of the osteogenic differentiation genes). The incorporation of a small percentage of C‐dots has also shown to significantly enhance the mechanical strength of hyper‐branched polyurethane without affecting its biocompatibility …”

Section: Carbon‐based Nanomaterials For Bone Tissue Engineeringmentioning

confidence: 99%

Bone Tissue Engineering via Carbon‐Based Nanomaterials

Peng

Zhao

Zhou

et al. 2020

Adv Healthcare Materials

142

106

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Bone tissue engineering (BTE) has received significant attention due to its enormous potential in treating critical‐sized bone defects and related diseases. Traditional materials such as metals, ceramics, and polymers have been widely applied as BTE scaffolds; however, their clinical applications have been rather limited due to various considerations. Recently, carbon‐based nanomaterials attract significant interests for their applications as BTE scaffolds due to their superior properties, including excellent mechanical strength, large surface area, tunable surface functionalities, high biocompatibility as well as abundant and inexpensive nature. In this article, recent studies and advancements on the use of carbon‐based nanomaterials with different dimensions such as graphene and its derivatives, carbon nanotubes, and carbon dots, for BTE are reviewed. Current challenges of carbon‐based nanomaterials for BTE and future trends in BTE scaffolds development are also highlighted and discussed.

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“…Among these polymers, PU has found extensive commercial and industrial applications due to its virtue of easiness of preparation and appealing mechanical properties . Of late, some work has been published relating to luminescent PU; however, to the best of our knowledge, sunlight‐activated long persistent luminescent polyurethane (LPLPU) has been scarcely reported to date.…”

Section: Introductionmentioning

confidence: 99%

Sunlight‐activated long persistent luminescent polyurethane incorporated with amino‐functionalized SrAl₂O₄:Eu²⁺,Dy³⁺ phosphor

Tian

Wen

Fan

et al. 2016

Polymer International

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An amino‐terminated long persistent luminescent phosphor (Amino‐SrAl2O4:Eu2+,Dy3+) was prepared based on inorganic SrAl2O4:Eu2+,Dy3+ phosphor, chemically modified with 3‐aminopropyltriethoxysilane (KH550). Fourier transform infrared and X‐ray photoelectron spectral, thermogravimetric and scanning electron microscopic measurements confirmed the successful synthesis of Amino‐SrAl2O4:Eu2+,Dy3+. Then this amino‐functionalized phosphor was introduced into polyurethane (PU) through urea linkages, and the effects of the chemical combination of Amino‐SrAl2O4:Eu2+,Dy3+ and PU on the morphology, structure, storage stability, and mechanical, thermal and luminescent properties of the resultant long persistent luminescent polyurethane (LPLPU) were investigated. Compared with SrAl2O4:Eu2+,Dy3+/PU composites prepared by physical blending, the LPLPU shows better mechanical properties and storage stability due to the good compatibility of Amino‐SrAl2O4:Eu2+,Dy3+ with PU. More residues and higher initial decomposition temperature are observed because the interaction of the amino‐phosphor and PU delays the degradation. Study of the luminescent effect reveals that the LPLPU shows more than 10 h afterglow after cessation of the excitation light, and the brightness of green light in darkness is basically the same as that of LPLPU and SrAl2O4:Eu2+,Dy3+/PU. © 2016 Society of Chemical Industry

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High performance luminescent thermosetting waterborne hyperbranched polyurethane/carbon quantum dot nanocomposite with in vitro cytocompatibility

Cited by 70 publications

References 33 publications

Biodegradable tough waterborne hyperbranched polyester/carbon dot nanocomposite: approach towards an eco-friendly material

Biodegradable tough waterborne hyperbranched polyester/carbon dot nanocomposite: approach towards an eco-friendly material

Bone Tissue Engineering via Carbon‐Based Nanomaterials

Sunlight‐activated long persistent luminescent polyurethane incorporated with amino‐functionalized SrAl₂O₄:Eu²⁺,Dy³⁺ phosphor

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High performance luminescent thermosetting waterborne hyperbranched polyurethane/carbon quantum dot nanocomposite with in vitro cytocompatibility

Cited by 70 publications

References 33 publications

Biodegradable tough waterborne hyperbranched polyester/carbon dot nanocomposite: approach towards an eco-friendly material

Biodegradable tough waterborne hyperbranched polyester/carbon dot nanocomposite: approach towards an eco-friendly material

Bone Tissue Engineering via Carbon‐Based Nanomaterials

Sunlight‐activated long persistent luminescent polyurethane incorporated with amino‐functionalized SrAl2O4:Eu2+,Dy3+ phosphor

Contact Info

Product

Resources

About

Sunlight‐activated long persistent luminescent polyurethane incorporated with amino‐functionalized SrAl₂O₄:Eu²⁺,Dy³⁺ phosphor