exfoliation – TechConnect Briefs

Degradation Mechanisms in Electric Double Layer Capacitors Subjected to Voltage and Temperature Stress Testing

Peter A.S., Azarian M.H., Pecht M., University of Maryland, US

Due to their high power densities, electric double layer capacitors ¬¬(EDLCs) are used to supplement high energy density power sources (such as lithium ion batteries and fuel cells) in applications such as automotive kinetic energy [...]

Overcoming the Achilles’ Heel of Processing of Polymer Nanocomposites: Achieving Well-Dispersed Polymer-Graphite, Polymer-Carbon Nanotube, and Polymer-Graphene Nanocomposites with Major Property Enhancements by Solid-State Shear Pulverization

Torkelson J.M., Brunner P.J., Kane N., Northwestern University, US

Polymer nanocomposites, particularly with carbon-based nanofiller, hold promise for large-scale, commercial application of novel materials with enhanced, tunable properties. Unfortunately, a stumbling block in achieving this goal on a commercial scale is the remarkable difficulty [...]

Rheological Characterization of Melt Compounded Polypropylene/clay nanocomposites

Abdel-Goad M., Kretzschmar B., Pötschke P., Al-maameri R., Heinrich G., Sultan Qaboos University, OM

Polypropylene/clay nanocomposites were prepared by using a two step melt compounding process on twin screw extruders. In order to enhance the exfoliation, time and degree of mixing were varied using different screw speeds and dosing [...]

Evaluation of the Degree of Exfoliation in Poly(epsilon-caprolactone) Nanocomposites Using by the Dynamic Mechanical Analysis

Chung J.W., Jeon J-D, Kwak S-Y, Seoul National University, KR

Nanocomposites composed of poly(epsilon-caprolactone) (PCL) and the organoclays which were layered silicate with the organic modifiers, i.e., nonpolar (OC25A) and polar (OC30B), were prepared by melt mixing. After mixing, we imposed additional heat to PCL/organoclay [...]

Structure and Rheology of Supercritical Carbon Dioxide Exfoliated Polymer Nanocomposites

Serhatkulu G.K., Horsch S.E., Kannan R., Gulari E., Wayne State University, US

A major technological barrier to achieving superior properties of nano-structured composite materials is the difficulty of dispersing fillers uniformly in a host matrix. The existing nanocomposite manufacturing processes achieve property improvements through chemical modifications of [...]

Effect of Nanoclay Content on Mechanical Behaviour of TGDDM Epoxy Nanocomposites

Huong N.T.P., Crosky A., Qi B., Kelly D., Li D.C., The University of New South Wales, AU

Exfoliated nanocomposites based on tetraglycidyldiamino diphenylmethane (TGDDM) cured by diethyltoluene diamine (DETDA) reinforced with 1-20 phr of a commercial nanoclay (I30E) were prepared. The effect of the nanoclay content on the compressive modulus of the [...]

Polymeric Nanocomposites Enabled by Controlled Architecture Materials

Shefelbine T.A., Marx R.E., Nelson J.M., Longabach J.W., Brostrom M.L., Bucket M.I., 3M Corporate Research, US

This presentation will focus on the use of Controlled Architecture Materials (CAMs): block copolymers, telechelic, gradient and star branched polymers as additives to induce the exfoliation of nanoclays in thermoplastic resins. Conventional exfoliation methods include [...]