Experimental and theoretical studies of the interaction of ketoprofen in halloysite nanotubes

Sid, Dounia; Baitiche, Milad; Bourzami, Riadh; Merir, Roufaida; Djerboua, Ferhat; Gil, Antonio; Boutahala, Mokhtar

doi:10.1016/j.colsurfa.2021.127136

Cited by 23 publications

(5 citation statements)

References 43 publications

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“…A significant reduction in the specific surface area of the halloysite after modification and an increase in the size of pores and particles compared to pure halloysite indicated the build-up of the applied organic compound on the HNT surface ( Table 1 ), confirmed by SEM, as shown in Figure 1 . These observations are consistent with other studies [ 38 , 39 ].…”

Section: Resultssupporting

confidence: 94%

Morphology and Selected Properties of Modified Potato Thermoplastic Starch

et al. 2023

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Potato thermoplastic starch (TPS) containing 1 wt.% of pure halloysite (HNT), glycerol-modified halloysite (G-HNT) or polyester plasticizer-modified halloysite (PP-HNT) was prepared by melt-extrusion. Halloysites were characterized by FTIR, SEM, TGA, and DSC. Interactions between TPS and halloysites were studied by FTIR, SEM, and DMTA. The Vicat softening temperature, tensile, and flexural properties were also determined. FTIR proved the interactions between halloysite and the organic compound as well as between starch, plasticizers and halloysites. Pure HNT had the best thermal stability, but PP-HNT showed better thermal stability than G-HNT. The addition of HNT and G-HNT improved the TPS’s thermal stability, as evidenced by significantly higher T5%. Modified TPS showed higher a Vicat softening point, suggesting better hot water resistance. Halloysite improved TPS stiffness due to higher storage modulus. However, TPS/PP-HNT had the lowest stiffness, and TPS/HNT the highest. Halloysite increased Tα and lowered Tβ due to its simultaneous reinforcing and plasticizing effect. TPS/HNT showed an additional β-relaxation peak, suggesting the formation of a new crystalline phase. The mechanical properties of TPS were also improved in the presence of both pure and modified halloysites.

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Section: Resultssupporting

confidence: 94%

Morphology and Selected Properties of Modified Potato Thermoplastic Starch

et al. 2023

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“…Therefore, we use the inner surface as a computational model to explore the effects of metal cations on the adsorption of BTA in HNTs. To simulate the inner surface of HNTs, the kaolinite(001) surface was used based on the bulk structure of kaolinite (KLN), which is similar to the crystalline structure of HNTs. , The bulk structure of kaolinite was optimized with a 5 × 3 × 4 Monkhorst–Pack k -point mesh. The calculated lattice constants, a = 5.2588 Å, b = 9.0749 Å, c = 7.4900 Å, α = 91.249°, β = 105.556°, and γ = 89.690°, are in good agreement with previous experimental and theoretical values. − The surface slab was constructed with one layer (3 × 1) supercell of the KLN(001) surface and a vacuum space of 15 Å (Figure ).…”

Section: Methodsmentioning

confidence: 99%

“…To simulate the inner surface of HNTs, the kaolinite(001) surface was used based on the bulk structure of kaolinite (KLN), which is similar to the crystalline structure of HNTs. 33,34 The bulk structure of kaolinite was optimized with a 5 × 3 × 4 Monkhorst−Pack k-point mesh. The calculated lattice constants, a = 5.2588 Å, b = 9.0749 Å, c = 7.4900 Å, α = 91.249°, β = 105.556°, and γ = 89.690°, are in good agreement with previous experimental and theoretical values.…”

Section: Methodsmentioning

confidence: 99%

Insights into Effects of Metal Cations on the Adsorption of Benzotriazole on Halloysite Nanotubes: An Experimental and DFT Study

Pham

Nguyen²,

Le³

et al. 2022

J. Phys. Chem. C

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Natural halloysite nanotubes (HNTs) have attracted great interest as smart nanocontainers of corrosion inhibitors. The adsorption behavior of corrosion inhibitors on HNTs will affect their loading capacity, a crucial property of smart nanocontainers. This work modified the surface of HNTs by preadsorbing metal cations (M2+: Fe2+, Zn2+, or Cu2+) to improve the adsorption of benzotriazole (BTA) on HNTs. The results based on the thermal gravimetric analysis showed that the loading capacities of BTA in Fe2+-, Zn2+-, and Cu2+-adsorbed HNTs were 8.25, 8.39, and 9.74 wt %, respectively, which are significantly higher than those in pristine HNTs of 4.57 wt %. Furthermore, density functional theory calculations exhibited that the adsorption energies of BTA on the M2+-adsorbed surfaces increased compared to that on the clean surface. Notably, the increasing trend of adsorption energies is in good agreement with that of measured loading capacities. Moreover, the presence of metal cations significantly enhances the charge transfer between BTA and the surface. The density of states analysis indicated that the adsorbed metal cations shifted the valence bands of the surface close to the Fermi level, thereby enhancing the coupling between the occupied bands of HNTs and the unoccupied orbitals of BTA.

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“…30 KTF se može okarakterizirati niskom bioraspoloživošću, kratkim biološkim poluvremenom i slabom topljivosti u vodi, a njegovom učestalom konzumacijom može doći do gastrointestinalnih nuspojava. 31 U listopadu 2020., Američka agencija za hranu i lijekove (engl. U.S. Food and Drug Administration) zatražila je nadogradnju oznake na lijeku KTF zbog otkrivene mogućnosti štetnog utjecaja na jetru u fetalnom razvoju djece, pri čemu se ne preporučuje primjena KTF-a ženama koje su u dvadesetom ili višem tjednu trudnoće ili poslije.…”

Section: Ketoprofen (Ktf)unclassified

Ekotoksičnost nesteroidnih protuupalnih lijekova na vodene organizme

Bicanić¹,

Čugalj²,

Jajčević³

et al. 2023

Kemija U Industriji

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In today's modern world, it is difficult to imagine life without the use of non-steroidal anti-inflammatory drugs. Namely, due to easy availability, we witness their increasing presence in all components of the environment, where they most often end up due to improper disposal or via wastewater. Therefore, it is important to note that non-steroidal anti-inflammatory drugs can often be found as part of wastewater originating from pharmaceutical industries and hospitals, as well as municipal wastewater. In the last few decades, scientists have become aware that these drugs represent a great danger because, in addition to polluting all components of the environment, they also cause negative consequences for organisms present in the environment, thus, more time is being devoted to conducting ecotoxicity tests. Ecotoxicity tests are the best solution for monitoring the negative effects of individual substances and/or their mixtures on the organisms, whereby a negative effect for humans can be predicted as well. This paper provides an overview of previous research related to non-steroidal anti-inflammatory drugs and their role in the food chain. An overview of several types of drugs such as ibuprofen, diclofenac, and ketoprofen is given, as well as their effect on certain organisms such as Daphnia magna, Danio rerio, Tinca tinca, and Navicula sp.

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Experimental and theoretical studies of the interaction of ketoprofen in halloysite nanotubes

Cited by 23 publications

References 43 publications

Morphology and Selected Properties of Modified Potato Thermoplastic Starch

Morphology and Selected Properties of Modified Potato Thermoplastic Starch

Insights into Effects of Metal Cations on the Adsorption of Benzotriazole on Halloysite Nanotubes: An Experimental and DFT Study

Ekotoksičnost nesteroidnih protuupalnih lijekova na vodene organizme

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