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Like most epoxy nanocomposites actually presenting an intercalated structure, it is not surprising that most studies have shown that there was a reduction in T g. However, different concentrations of curing agent and various methods for obtaining these nanocomposites, as well as the type of clay used, directly influence the results.
Request PDF on ResearchGate | Processing of clay/epoxy nanocomposites by shear mixing | A three-roll mill was used to disperse/exfoliate the clay nanoparticles in an epoxy .
In the present study, a three-roll mill machine was used to disperse/exfoliate the nanoclay particles in an epoxy matrix. The compounding process was carried out with varying mixing time and concentrations of clay particles (1 to 10 wt.%).
3. Layered Clays for Epoxy Nanocomposites Clay/epoxy nanocomposites have received a great deal of attentions because of their potential applications [4,5,9,13,60–62]. The high aspect ratio of the silicate platelets [63–66] in the polymer
Oct 09, 2001· Clay-based nanocomposites are generally combinations of clays and polymers. Intercalated hybrids maintain a clay-like structure, with increased spacings between layers, while in exfoliated hybrids the clay layers have been separated and dispersed in a polymeric matrix.
Sep 12, 2018· Nanoclays have evoked a great deal of attention lately for the preparation of novel nanocomposite materials for several applications. This is attributed to their lamellar structures, which are distinguished by having high in-plane strength and stiffness, as well as a high aspect ratio. Nanocomposites have exhibited an advanced gas and water barrier properties compared to the .
Hence, the chapters address processing, rheology, mechanical properties and their interaction with fiber composites. Written by renowned researchers, this book is a collection of nine chapters which embrace the role of nano particles in composites. The first three .
CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): In the present study, a three-roll mill machine was used to disperse/exfoliate the nanoclay particles in an epoxy matrix. The compounding process was carried out with varying mixing time and concentrations of clay particles (1 to 10 wt.%). It was found that the longer the mixing time, the higher the degree of ...
Small-scale Fabrication Process of Clay-containing Thermosetting Nanocomposites by Jin Y. Park, Tye B. Davis and Paul L. Sullivan Minnesota State University, Mankato stiffness. It is also useful because the propertie Abstract Clay/Epoxy nanocomposites were fabricated using shear mixing to determine the increase in mechanical
and aspect ratio. Epoxy clay nanocomposites are finding vast applications in various industries like aero-space, defense, automobile, etc. The physical and chemical properties of the epoxy systems are influenced by the processing techniques, clay modifier and curing agents used for the preparation of nanocompos-ites.
Processing of Clay/Epoxy Nanocomposites by Shear Mixing. A three-roll mill was used to disperse/exfoliate the clay nanoparticles in an epoxy matrix. The compounding process was carried out with varying clay contents (1–10 wt.%). The technique was found highly efficient and environmentally friendly in achieving high levels of exfoliation and ...
The effects of organic modifier and processing method on morphology and mechanical properties of epoxy-clay nanocomposites were investigated. In this study, the preparation of nanocomposites by exfoliation-adsorption method involved an ultrasonic mixing procedure, and mechanical blending was used for in situ intercalative polymerization. The microstructure study revealed that the organoclay ...
In the present study, the failure of all nanocomposites at strengths lower than that of the pure epoxy can be assumed to be process related. As mentioned before, the compounding of nanoclay in an epoxy matrix with a three-roll mill produces a highly viscous and y material, and the higher the clay content the higher the viscosity.
Kornmann [3] used hand layup method in combination of vacuum bagging and hot processing technique to manufacture glass fiber/epoxy-layered silicate nanocomposites. Improvements in flexural strength, flexural modulus and decrease in water absorption at 50 qC were observed with the addition of nanoclay in comparison with fiber epoxy composite.
at 100°C for 3 h. The processing was carried out with4Lofresin in each batch. The fabrication of shear mixed nanocomposites was carried out using a three-step process. First, the desired volume fraction of nanoclay was added to the epoxy-diluent mixture and hand stirred until all the nanoclay was immersed. Then, the mixture was
Epoxy–clay nanocomposites were prepared by the dispersion of an organically modified layered clay in an epoxy resin (diglycidyl ether of bisphenol A) and curing in the presence of methyl tetrahydro acid anhydride at 80–160°C.
A three-fold increase in modulus at 120 °C was reported for a moderate clay particle concentration of 5% by weight. In the case of epoxy/clay nanocomposites increases in both modulus and strength were measured over those of pure epoxy. The relative increases were much more pronounced in the case of a rubbery matrix below T g. The tensile ...
Jan 18, 2012· Preparation of glass fiber-based epoxy nanocomposites for the optimization of processing parameters. Clays in different weight percentages (0.0, 0.5, 1.0 and 2.0 wt %) are mixed with the epoxy .
T1 - Clay/Polymer nanocomposites. T2 - Processing, properties, and applications. AU - Shunmugasamy, Vasanth Chakravarthy. AU - Xiang, Chongchen. AU - Gupta, Nikhil. PY - 2015/1/1. Y1 - 2015/1/1. N2 - Clay/polymer nanocomposites have been extensively studied in recent years. The present state of the art for these materials is summarized in this ...
Abstract: Epoxy/clay nanocomposites with a better exfoliated morphology have been successfully prepared using a so-called "slurry-compounding" process. The microstructures of the nanocomposites (epoxy/S-clays) were characterized by means of optical microscopy and ...
nanocomposites are finding uses in diverse consumer products, such as windows, sports equipment ... using butyl-rubber/nano-clay composites. .... for the efficient processing of products containing nanomaterials depending on rheology ... example, a three roll mill has been used to mix nanoclay into epoxy [10] matrix.
Yasmin et al. found that epoxy clay nanocomposites processed by three roll mill is efficient in achieving high levels of exfoliation and dispersion of clay particles within a short period of time. The modulus of the nanocomposites found to increase with increase in clay concentration.
A three-roll mill was used to disperse/exfoliate the clay nanoparticles in an epoxy matrix. The compounding process was carried out with varying clay contents (1–10 wt.%). The technique was found highly efficient and environmentally friendly in achieving high levels of exfoliation and dispersion within a short period of time.
The clay particles were mixed with acetone and sonicated, then mixed with the polymer, deaerated and cured. The ultimate objective of processing was to produce a polymer/clay nanocomposite with separated (exfoliated) platelets, dispersed as uniformly as possible. Samples were prepared with clay concentrations of up to 10 wt%.
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