Antibacterial sustained-release coatings from halloysite nanotubes/waterborne polyurethanes

Hendessi, Saman; Sevinis, E. Billur; Ünal, Serkan; Cebeci, Fevzi Çakmak; Menceloǵlu, Yusuf́ Z.; Ünal, Hayriye

doi:10.1016/j.porgcoat.2016.09.005

Cited by 83 publications

(35 citation statements)

References 44 publications

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“…8,9 Although these nanoparticles have good antibacterial effect, safety and environmental issues caused by the release of heavy metal ions are concerned and limit their widespread use. 10 Compared with those metal nanoparticles, natural nanoparticles are desirable materials to use with the aim of developing new antibacterial textile products without environmental hazards or biological toxicity for the textile industry.…”

Section: Introductionmentioning

confidence: 99%

Long-term antibacterial protected cotton fabric coating by controlled release of chlorhexidine gluconate from halloysite nanotubes

Yang

Liu

et al. 2017

RSC Adv.

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Section: Introductionmentioning

confidence: 99%

Long-term antibacterial protected cotton fabric coating by controlled release of chlorhexidine gluconate from halloysite nanotubes

Yang

Liu

et al. 2017

RSC Adv.

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“…Carvacrol molecules inside and/or outside HNTs are very difficult to be accurately determined. The evaluation of the degradation temperatures of the HNTs, carvacrol and HNTs-carvacrol, through TGA analysis, can be used to give an indication about the molecules' intercalation, as elsewhere demonstrated (Gorrasi, 2015;Biddeci et al, 2016;Hendessi et al, 2016). Figure 2 reports the weight (%) (TG) (A) and derivative weight (DTG) (B) analysis performed on the HNTs, carvacrol and the nano-hybrid HNTscarvacrol.…”

Section: Properties Of Pure and Composite Tp-based Filmsmentioning

confidence: 94%

Valorization of Tomato Processing Residues Through the Production of Active Bio-Composites for Packaging Applications

et al. 2019

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The present work reports a study aimed at investigating the recovery and the upgrade of tomato processing residues through the preparation of innovative green composites based on tomato peels (TPs) and natural halloysite nanotubes (HNTs) loaded with carvacrol, as a natural antibacterial agent. The loading of carvacrol into HNTs was successfully achieved through a simple procedure that does not involve any chemical modifications of HNTs. Composite films with different amount of HNTs (i.e., 2.5, 5, 10, 20%wt) were prepared using mechanical milling in presence of water, followed by solvent casting method. The structural organization and the main physical properties of the obtained bio-based active composites have been deeply investigated. In particular, thermal and mechanical properties along with the films' interaction with water vapor were assessed and then correlated to the filler loading. Results show that the thermal behaviour of bio-composites improves with the filler loading. Conversely, the mechanical properties get worse, especially at higher loading, due to the poor interaction between HNTs and matrix. The presence of hydrophilic HNTs was found to not dramatically increase the degree of hydrophilicity of the of the materials, most likely due to the presence of hydrophobic carvacrol that acts as an hydrophobic coating for HNTs. The release of carvacrol was also analyzed. Results show that the obtained composites exhibit a long-term release of the antimicrobial agent, which suggests them to be promising candidate materials for food packaging application.

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“…Bioactive additives and materials as well as the methods to obtain them have been gaining more attention over the years due to the concern related to their toxicity and | Vietnam Academy of Science and Technology environmental impact. At present, eco-friendly variants like biogenic compounds or their derivatives are intensively studied [6][7][8]. Therefore, from the emergence of a greater awareness in relation to practices and methodologies, green chemistry approach was promising for the obtaining of bioactive materials [9].…”

Section: Introductionmentioning

confidence: 99%

Antifungal applications for nano-additives synthesized with a bio-based approach

Gámez-Espinosa

Roque

Obidi

et al. 2020

Adv. Nat. Sci: Nanosci. Nanotechnol.

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Filamentous fungi are microorganisms that cause deterioration of structural materials due to their ecological plasticity and vegetative functions. Functionalised sol-gel based products can be used to control this kind of biodeterioration through the association to antifungal active additives which are trapped in the siloxane crosslinking. Bioactive additives and materials to control microbial growth have been gaining more attention over the years. However, due to the concern about their toxicity, bio-based approach has been explored. The aim of the present research was to obtain antifungal additives with nanoparticles synthesised with aqueous extract of Senna occidentalis L and silver or copper salts to obtain a functionalised sol-gel based product to control the biodeterioration of bricks. Nanoparticles were characterised by UV-vis spectroscopy, transmission electron microscopy and x-ray diffraction. Silver nanoparticles (15 nm) showed higher stability over time and proved to be active against Aspergillus versicolor and Cladosporium cladosporioides which were isolated from brick wall. The strains were selected due to their high frequency in mycobiota of biodeteriorated structural building materials. The silver nanoparticles were successfully integrated in a silane-based matrix to be applied in bricks. The samples were characterised by surface tension determination, contact angle measurement, water absorption determination, scanning electron microscopy and energy dispersive x-ray spectroscopy. Bricks with the lower concentration (2%) of the functionalised silane (3mercaptopropyltrimethoxy) showed to be efficient to prevent fungal biofilm development with 100% of inhibition against both strains.

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Antibacterial sustained-release coatings from halloysite nanotubes/waterborne polyurethanes

Cited by 83 publications

References 44 publications

Long-term antibacterial protected cotton fabric coating by controlled release of chlorhexidine gluconate from halloysite nanotubes

Long-term antibacterial protected cotton fabric coating by controlled release of chlorhexidine gluconate from halloysite nanotubes

Valorization of Tomato Processing Residues Through the Production of Active Bio-Composites for Packaging Applications

Antifungal applications for nano-additives synthesized with a bio-based approach

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