Investigation of advanced mica powder nanocomposite filler materials: Surface energy analysis, powder rheology and sound absorption performance

Abstract

Two types of nano/micro sized mica powders for polymer composites, muscovite and phlogopite, were tested for their sound absorption capabilities. Acoustical performance was correlated to surface energy analysis and powder rheology testing. Inverse gas chromatography (iGC) was used to determine the surface energy, with the dominant M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT component being the dispersive component. This reflected the non-polar, hydrophobic, character of the micas. The determined yield locus and Mohr´s circles indicated that the material with the highest packing density exhibited more free flowing powder characteristics, compared with the lower packing density materials, which exhibited a greater cohesive powder flow behaviour. All tested mica powders were sensitive to aeration and become fluidised. Based on the acoustical measurements the worst sound absorption performance was found for the highest packing density material exhibiting the highest magnitude of the longitudinal elastic coefficient.

Designing high‐performance colour cosmetics through optimization of powder flow characteristics

“…Mica: According to Lapčík et al . , mica powder nanocomposite acts as a filler in powder foundation. It is non‐polar and hydrophobic.…”

Graphene Oxide‐Based Lamella Network for Enhanced Sound Absorption

“…These fibrous and porous materials include a wide range of both synthetic (ceramic, metal, and polymer foam, aerogel, Kevlar, fiber glass, glass wool, basalt, and carbon nanotubes) and natural (cotton, hemp, coir, ramie, wool, sisal, bamboo, wood, flax, bagasse, and jute) substances . To date, numerous structural variations have been reported for efficient acoustic absorption that include cellular, fibrous, granular, membrane, bundled hollow fiber, foam/film layering, nanotubes, and helical shaped porous structures . Among these structures, cellular foam with polymeric, metallic, and ceramic structures has been extensively used as commercial acoustic absorbers due to their ease of handling, installation, replacement, manufacturing, positioning, and durability to provide economical acoustic absorption technology.…”

Microstructure–property relationships of organo-montmorillonite/polyurethane nanocomposites: Influence of hard segment content

“…Furthermore, incorporating finely distributed solid particles into semicrystalline polymers such as polyolefins and polyamides can provoke nucleation which is essential in industrial applications to control the polymer structure via crystallization and also to shorten the cycle time of crystallization (Göschel et al, 2007). Minerals such as talc (Fiorentino et al, 2015), mica (Velten et al, 1999;Lapčík et al, 2015), kaolinite (Saw et al, 2015), calcite (Zhu et al, 2014) and glass fibers (Iroh and Berry, 1993) are among the most frequently employed fillers which also serve as nucleating additives. However, due to their incompatible chemical nature with the polymer matrix, the required uniform dispersion of small particles to acquire the anticipated fine crystalline structure remains a challenge (Cao and Jana, 2007).…”