An Investigation into the Effects of Different Nanoclays on Polyurethane Nanocomposites Properties

Rahnama, Mohammad Reza; Barikani, Mehdi; Barmar, Mohammad; Honarkar, Hengameh

doi:10.1080/03602559.2014.886045

Cited by 14 publications

(4 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Here, the peaks at 3.29°and 4.96°related to the silicate structure and organic modifier present in the nanoclay can be highlighted (dimethylbenzylhydrogenated tallow ammonium), respectively. 53,54 In the next range (2θ between 10 and 30°), considerable intensities are observed as well. Within this region, the peaks at 20.04°and 22.04°are remarked, which are attributed to the planes 020 and −111, respectively.…”

Section: Molecular Weight Determinationmentioning

confidence: 89%

Formulation of Multifunctional Materials Based on the Reaction of Glyoxalated Lignins and a Nanoclay/Nanosilicate

et al. 2019

View full text Add to dashboard Cite

Two organosolv lignins from different origins, namely, almond shells and maritime pine, were modified by using a nanoclay and nanosilicate. Prior to modification, they were activated via glyoxalation to enhance the reactivity of the lignins and thus ease the introduction of the nanoparticles into their structure. The lignins were characterized by several techniques (Fourier transformed infrared, high-performance size exclusion chromatography, 1H NMR, X-ray diffraction, and thermogravimetric analysis) before and after modification to elucidate the main chemical and structural changes. The reaction with glyoxal proved to increase the amount of hydroxyl groups and methylene bridges. This tendency was more pronounced, as the percentage of glyoxal was incremented. On the other side, the addition of the nanoclay and nanosilicate particles improved the thermal stability of the lignins compared to that of the original unmodified ones. This trend was more evident for the lignin derived from maritime pine, which displayed better results regarding the thermal stability, indicating a more effective combination of the nanoparticles in the lignin structure during the modification process.

show abstract

Section: Molecular Weight Determinationmentioning

confidence: 89%

Formulation of Multifunctional Materials Based on the Reaction of Glyoxalated Lignins and a Nanoclay/Nanosilicate

et al. 2019

View full text Add to dashboard Cite

show abstract

“…A number of studies reported the development of intercalated or exfoliated nanocomposite structures with polyolefin/montmorillonite (MMT) [ 133 , 136 – 142 ]. These studies revealed that the incorporation procedure into a polymer matrix is important in order to obtain complete nanoclay dispersion.…”

Section: Microporous Polymers As Carriers Of Insect Repellentmentioning

confidence: 99%

Mosquito‐repellent controlled‐release formulations for fighting infectious diseases

Mapossa

Focke

Tewo

et al. 2021

Malar J

View full text Add to dashboard Cite

Malaria is a principal cause of illness and death in countries where the disease is endemic. Personal protection against mosquitoes using repellents could be a useful method that can reduce and/or prevent transmission of mosquito-borne diseases. The available repellent products, such as creams, roll-ons, and sprays for personal protection against mosquitoes, lack adequate long-term efficacy. In most cases, they need to be re-applied or replaced frequently. The encapsulation and release of the repellents from several matrices has risen as an alternative process for the development of invention of repellent based systems. The present work reviews various studies about the development and use of repellent controlled-release formulations such as polymer microcapsules, polymer microporous formulations, polymer micelles, nanoemulsions, solid-lipid nanoparticles, liposomes and cyclodextrins as new tools for mosquito-borne malaria control in the outdoor environment. Furthermore, investigation on the mathematical modelling used for the release rate of repellents is discussed in depth by exploring the Higuchi, Korsmeyer-Peppas, Weibull models, as well as the recently developed Mapossa model. Therefore, the studies searched suggest that the final repellents based-product should not only be effective against mosquito vectors of malaria parasites, but also reduce the biting frequency of other mosquitoes transmitting diseases, such as dengue fever, chikungunya, yellow fever and Zika virus. In this way, they will contribute to the improvement in overall public health and social well-being.

show abstract

“…This synergy resulted in an increased level of compatibility between PLA and the plasticizers. Indeed, the aromatic groups present in the D43B modifier had the potential to interact with the hydroxyl groups found in both these plasticizers and PLA chains, thereby promoting improved compatibility within the blend 16,21,30,31 …”

Section: Resultsmentioning

confidence: 99%

Interactions between PLA, organo‐montmorillonite and plasticizer: Synergistic effect on the barrier and mechanical properties of PLA nanocomposites blown films

Adrar,

Ajji

2023

J of Applied Polymer Sci

View full text Add to dashboard Cite

In this study, the impact of incorporating a plasticizer on the compatibility between organo‐montmorillonite (OMMt) and polylactic acid (PLA) is investigated, and the resulting barrier and mechanical properties are reported. Four polymers were chosen as plasticizers to prepare the PLA nanocomposite blown films: poly(ethylene glycol), poly(ethylene oxide), polycaprolactone (PCL), and random ethylene‐methyl acrylate‐glycidyl methacrylate terpolymer. Firstly, 5 wt% of each plasticizer and 3 wt% of OMMt (Dellite® D43B) were mixed simultaneously with PLA in a twin‐screw extruder and then introduced into the hopper of a single screw extruder to produce D43B‐PLA/plasticizer nanocomposite films. The compatibilization effect was examined based on microstructure observations and thermodynamic predictions. Crystallinity was evaluated using DSC and XRD measurements. The results obtained for permeability and mechanical testing showed that the improvement of barrier and mechanical properties depends directly on the degree of compatibility between plasticizer, OMMt, and PLA. Indeed, the interfacial properties, XRD diffraction, and TEM images showed that a synergistic effect can result from high interfacial interactions between different compounds.

show abstract

An Investigation into the Effects of Different Nanoclays on Polyurethane Nanocomposites Properties

Cited by 14 publications

References 51 publications

Formulation of Multifunctional Materials Based on the Reaction of Glyoxalated Lignins and a Nanoclay/Nanosilicate

Formulation of Multifunctional Materials Based on the Reaction of Glyoxalated Lignins and a Nanoclay/Nanosilicate

Mosquito‐repellent controlled‐release formulations for fighting infectious diseases

Interactions between PLA, organo‐montmorillonite and plasticizer: Synergistic effect on the barrier and mechanical properties of PLA nanocomposites blown films

Contact Info

Product

Resources

About