Luminescent and UV-Shielding ZnO Quantum Dots/Carboxymethylcellulose Sodium Nanocomposite Polymer Films

Li, Tianyi; Li, Bin; Ji, Yali; Wang, Lili

doi:10.3390/polym10101112

Cited by 22 publications

(17 citation statements)

References 24 publications

(28 reference statements)

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“…This occurs because lignin presents a complex structure, that is composed of phenolic hydroxyl, carbonyl groups, and benzylic hydroxyl, that present different thermal stability. So, its degradation occurs in temperatures ranging from 200 to 500 � C where the weight of the sample is reduced ~50 wt% (Domínguez et al, 2008) On the other hand, CMC degradation occurs in a narrow temperature range (200-340 � C) (Li et al, 2018).…”

Section: Thermal Behaviormentioning

confidence: 99%

Carboxymethyl cellulose-based films: Effect of organosolv lignin incorporation on physicochemical and antioxidant properties

Michelin

Marques

Pastrana

et al. 2020

Journal of Food Engineering

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Organosolv lignin was incorporated in carboxymethyl cellulose (CMC)-based films as a reinforcing and bioactive agent. Films were produced by the casting method using compatible and environmentally friendly solvents. The incorporation of lignin in CMC-based films was evaluated in term of morphology, physicochemical, barrier, mechanical and antioxidant properties. Solubility tests showed that lignin improved the water resistance of the films for approx. 60%. This behavior was also observed for the water vapor permeability, achieving a 20% reduction. Morphological characteristics suggested low compatibility between organosolv lignin and CMC matrix, revealed by the small aggregates homogeneously distributed in the film, through scanning electron microscopy, related to the self-assembly behavior of lignin. CMC/lignin-based films also presented higher thermal stability. Fourier transform infrared spectroscopy showed that incorporation of lignin led to small changes in the film's structure. Finally, organosolv lignin proved to be a promising material for the development of active CMCbased films due to its demonstrated antioxidant activity that can be useful to pack food products that suffer from undesirable oxidation reactions.

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Section: Thermal Behaviormentioning

confidence: 99%

Carboxymethyl cellulose-based films: Effect of organosolv lignin incorporation on physicochemical and antioxidant properties

Michelin

Marques

Pastrana

et al. 2020

Journal of Food Engineering

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“…It is recognized as a bio-safe material. 14 Its use in cosmetic products is approved by the Food and Drug Administration (FDA). 15 But the inconvenient of ZnO is that the antibacterial activity is too low, far from meeting the requirement of high antibacterial activity.…”

Section: Introductionmentioning

confidence: 99%

Green cinnamaldehyde and thymol modified zinc oxide with double synergistic antibacterial effects in polypropylene

Shi

Shen

Yang

et al. 2021

J of Applied Polymer Sci

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The green cinnamaldehyde (CA) and thymol (THY) separately or successively modified O-ZnO (O-ZnO-CA, O-ZnO-THY, and O-ZnO-CA-THY) were prepared after (3-aminopropyl) triethoxysilane (KH550) was grafted to the surface of ZnO (O-ZnO) and characterized by FTIR, TGA, and SEM. Polypropylene composites (PP/O-ZnO-CA, PP/O-ZnO-THY, and PP/O-ZnO-CA-THY) were prepared by melting the modified O-ZnO and PP. The antibacterial tests showed that the antibacterial rate of PP/O-ZnO-CA and PP/O-ZnO-THY against S. aureus and E. coli was obviously enhanced. It indicated an excellent synergetic antibacterial effect of O-ZnO and the little CA or THY grafted on the surface of O-ZnO. The antibacterial effect of O-ZnO-CA and O-ZnO-THY was related to the hydrophobic and hydrophilic groups contained in CA and THY. Importantly, CA and THY in O-ZnO-CA-THY exhibited another excellent synergetic antibacterial effect against both S. aureus and E. coli. The antibacterial rate of three PP composites containing 4 phr O-ZnO-CA-THY against S. aureus and E. coli reached 95% and 90%, respectively. The mechanism was regarded as that CA and THY grafted onto the same O-ZnO improved the contact probability between antibacterial agents and bacteria. Moreover, O-ZnO-CA, O-ZnO-THY, and O-ZnO-CA-THY had excellent migration resistance in the PP matrix.

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“…There are other materials also used in UV shielding. Especially, different types of dye, carbon, and polydopamine are also used as UV-shielding materials [ 20 , 21 , 22 , 23 , 24 , 25 , 26 ]. However, the CeO 2 , similar to other metal oxides, is an attractive choice as it is significantly less toxic, cheap, and possesses filler properties [ 4 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

“…UV degradation resistance and the self-healing of polymers has also been separately worked on [ 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 ]. Zhang et al prepared polyethylenimine-based elastomers with self-healing property [ 27 ].…”

Section: Introductionmentioning

confidence: 99%

Multi Self-Healable UV Shielding Polyurethane/CeO2 Protective Coating: The Effect of Low-Molecular-Weight Polyols

et al. 2020

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We prepared a series of polyurethane (PU) coatings with defined contents using poly(tetramethylene oxide)glycol (PTMG) with two different molecular weights (i.e., Mn = 2000 and 650), as well as polydimethyl siloxane (PDMS) with a molecular weight of Mn 550. For every coating, maximum adhesive strength and excellent self-healing character (three times) were found using 6.775 mol% mixed with low-molecular-weight-based polyols (PU-11-3-3). Defined 1.0 wt% CeO2 was also used for the PU-11-3-3 coating (i.e., PU-11-3-3-CeO2) to obtain UV shielding properties. Both the in situ polymerization and blending processes were separately applied during the preparation of the PU-11-3-3-CeO2 coating dispersion. The in situ polymerization-based coating (i.e., PU-11-3-3-CeO2-P) showed similar self-healing properties. The PU-11-3-3-CeO2-P coating also showed excellent UV shielding in real outdoor exposure conditions.

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Luminescent and UV-Shielding ZnO Quantum Dots/Carboxymethylcellulose Sodium Nanocomposite Polymer Films

Cited by 22 publications

References 24 publications

Carboxymethyl cellulose-based films: Effect of organosolv lignin incorporation on physicochemical and antioxidant properties

Carboxymethyl cellulose-based films: Effect of organosolv lignin incorporation on physicochemical and antioxidant properties

Green cinnamaldehyde and thymol modified zinc oxide with double synergistic antibacterial effects in polypropylene

Multi Self-Healable UV Shielding Polyurethane/CeO2 Protective Coating: The Effect of Low-Molecular-Weight Polyols

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