The influence of different types of nanofillers – carbon nanotubes (CNT) and organically modified nanoclay – on the flexural properties and nail penetration resistance of carbon fiber reinforced methyl methacrylate (MMA) composite have been investigated. An ultrasonic mixing was used to distribute various content of nanofillers (0.7 wt.% – 3.0 wt.%) in MMA resin. Scanning electron microscopy and X-ray diffraction analyses confirmed formation of intercalated MMA clay nanocomposites. Two different stacking sequences, [0/90]3 or [0/90/45]2, and two types of carbon fibre, with or without epoxy binder, were used for composites preparation. The composites with stacking sequence of [0/90]3 show higher resistance to the mechanical loading. Epoxy binder increases fibre adhesion interaction with MMA resin, however, almost does not influences on the fibre reinforced composite strength properties.
The results demonstrated that only low content (up to 1 wt.%) of organically modified nanoclay Cloisite 10A increases the carbon fibre reinforced composites resistance to flexure and nail penetration. The low content of CNT also increases flexural stress and modulus, but decreases resistance to the nail penetration.
In this study, the carbon fibre reinforced methyl methacrylate resin composite (CF/MMA) toecaps for safety shoes were manufactured to change impact behaviour by incorporation of nanofillers. Different types of nanofillers such as nanotubes (inorganic halloysite, multiwalled carbon nanotubes) and unmodified and organically modified nanoclays (natural bentonite and montmorillonites) were dispersed inMMA composition. The low-velocity impact test with dropweight machine was performed with respect to the nanofiller nature and carbon fibre stacking sequence. It was found that the most influence on the stiffness and impact damage of the CF/MMA nanocomposite toecaps show organic and inorganic nanotubes or unmodified nanoclay (bentonite). Effective amounts of these nanofillers improve the low velocity impact response in 16 % -20 %. Although the influence of nanofillerson CF/MMA composites energy absorption capability at impact energy level of 90 J is negligible, however, theireffect on thesizeof the composite toecaps damage areais considerable.
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