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Showing 1 to 18 of 18 for “"nanoclays"”.
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Functionalization of nanoclays through exchange reactions
A cationic clay (sodium-montmorillonite, MMT) and an anionic clay (hydrotalcite, HT) were treated with two phosphonium based ionic liquids (ILs) and a commercial corrosion inhibitor. Clay modification was examined by TGA, FTLR and WXRD. The cationic clay modified with both ILs had similar thermal …
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Removal of Nitrates from Stormwater Using Nanoclays
… This study analyzed the ability of several nanoclays to remove nitrate in runoff and determined the feasibility of using them as a soil supplement for LID implementation. Six different nanoclays and HCl-treated clays were compared (pre-modified trimethyl stearyl ammonium nanoclay, …
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Study of controlled release of active pharmaceutical ingredients from functionalized nanoclays and polymer matrices
… to have a sustained API release by utilizing the nanoclays was attempted. Since the API present in the clay interspacing may experience one more step in its release by diffusion as compared to the binary system, the API from the ternary system showed a slower and more controlled release than the …
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The effect of nanoclays on the properties of aspirin modified enteric polymer prepared by hot-melt mixing
Melt mixing in batch equipment or continuous extruders is a technique that recently gained the attention of the pharmaceutical industry. This dissertation investigates two controlled-release drug delivery systems. The first system, namely the enteric matrix, contains an active pharmaceutical …
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Thermal and transport properties of layered silicate nanomaterials subjected to extreme thermal cycling
… adopt into the polymer matrix the addition of nanoclays into a polymer is expected to reduce the permeation to several gases without sacrificing the mechanical strength of the nanocomposite as well as providing additional improvements such as increase of thermal stability of the nanocomposite. …
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Development of Anti-corrosive Polyester Powder Coatings
… powder with sacrificial anode effect, and two nanoclays with barrier effect were incorporated into the coatings to enhance the anti-corrosive performance. The anti-corrosive properties were evaluated by electrochemical techniques and neutral salt spray tests. The combined effects of the …
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Polyethylene Terephthalate / clay nanocomposites. Compounding, fabrication and characterisation of the thermal, rheological, barrier and mechanical properties of Polyethylene Terephthalate / clay nanocomposites.
… important finding is that incorporation of nanoclays in PET gives rise to improvements in several key process and product parameters together ¿ processability/ reduced process energy, thermal properties, barrier properties and stiffness. The PET pellets have been compounded with carefully …
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Development and evaluation of fire retardent unsaturated polyester clay nanocomposites.
… (PLSN) materials. A range of commercial nanoclays were sourced, and characterised. In addition a range of modified clays were developed to improve fire performance and compatibility. Intercalated nanoclays in polyester resin formed an integral, dense char and therefore provided good fire …
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Polymer/Clay Nanocomposites as Barrier Materials Used for VOC Removal
… membranes is the dispersion properties of the nanoclays in the polymer matrix, and the generation of a tortuous pathway that will decrease gas permeation. The tortuous pathway is created by a nanoclay filler, whose ideal exfoliated structure has high surface area, and high aspect ratio. By …
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Nano-filled Epoxy: Mechanical and Fire Behavior and Modeling of Nanocomposite Columns Under Fire
… epoxy. The nanofillers used are montmorillonite nanoclays and carbon nanofibers. Three types of nanocomposites are manufactured: epoxy-clay, epoxy-carbon nanofiber, and epoxy-clay-carbon nanofiber nanocomposites. Fracture tests performed include Izod impact and fracture toughness, for the …
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Effects of Using Clay Nanoparticles as a Soil Amendment to Remove Nitrate from Stormwater
… efficiencies. The use of clay nanoparticles, or nanoclays, can maximize the amount of surface area available for adsorbance potentially increasing the amount of nitrate removed from water. The goal of this study was to identify a nanoclay with high adsorbance by testing its nitrate removal …
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Fabrication of zein nanostructure
… nanocomposite structures. The impact of nanoclays on the physical properties of zein films strongly depended on the film preparation techniques. The impact of nanoclay concentration was more pronounced in the films made by extrusion blowing technique than by the solvent casting technique. …
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Chain Extension of Polyamide-6 & Polyamide-6/Organoclay Nanocomposites. Control of thermal degradation of polyamide-6/organoclay nanocomposites during extrusion using a novel chain extender
… that chain extender increased the dispersion of nanoclays in the PA- 6 matrix. The crystallinity of the PA-6 was slightly affected by addition of organoclay and chain extender. The samples obtained by linear twin screw extrusion showed higher rheological properties than the samples from …
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Halloysite for smart nano-structured materials in sustainable applications
… the co-assembling of inorganic particles, i.e. nanoclays, with organic moieties such as biopolymers. Among clays, Halloysite Nanotubes (HNTs) were deeply investigated due to their peculiar properties: morphology, different chemistry and charges on the internal and external surfaces, high aspect …
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A Hydrodynamic Method for Measuring Aqueous Nanoparticle Surface Interactions
… findings are the first of their kind for LRD and nanoclays in dilute dispersions.</p>
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Elastocaloric properties of Natural Rubber for Solid-State Cooling Technologies
… both natural (MMT) and organo-modified (O-MMT) nanoclays to the most promising formulation identified in the first part of the work was assessed. Two series of NR-based nanocomposites, containing 1, 3 and 5 phr nanofiller, were prepared and characterized in terms of morphology, thermal, …
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Influences on nanocomposite structural performance: experimental study on materials processing and bonding
… of the nanoclay. The analysis showed that the nanoclays had<br/>become intercalated, with the clay layer separation increasing from 2- 4 nm. Further testing<br/>looked at the mechanical and thermal properties of the nanoclay composites, comparing the<br/>nanoclay processing in amine hardener or …
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Structure-Process-Property Relationships of Cellulose Nanocrystal Thermoplastic Urethane Composites
… limited to carbon nanotubes, graphene, silica, nanoclays, and cellulose nanocrystals. The literature presented herein aims to investigate structure-process-property relationships of cellulose nanocrystal (CNC) polymer composites. These CNC nanocomposites are unique in that they provide a dynamic …