Limits...
Characterization of Hybrid Epoxy Nanocomposites

View Article: PubMed Central - PubMed

ABSTRACT

This study focused on the effect of Multi Wall Carbon Nanotubes (MWCNT) content and its surface treatment on thermo-mechanical properties of epoxy nanocomposites. MWCNTs were surface treated and incorporated into two epoxy systems. MWCNT's surface treatments were based on: (a) Titania coating obtained by sol-gel process and (b) a nonionic surfactant. Thermo-mechanical properties improvement was obtained following incorporation of treated MWCNT. It was noticed that small amounts of titania coated MWCNT (0.05 wt %) led to an increase in the glass transition temperature and stiffness. The best performance was achieved adding 0.3 wt % titania coated MWCNT where an increase of 10 °C in the glass transition temperature and 30% in storage modulus were obtained.

No MeSH data available.


SEM image of epoxy system 1 with 0.3% untreated MWCNT showing a “crack front bowing” toughening mechanism.
© Copyright Policy
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC5304600&req=5

nanomaterials-02-00348-f004: SEM image of epoxy system 1 with 0.3% untreated MWCNT showing a “crack front bowing” toughening mechanism.

Mentions: Figure 4 and Table 8 show SEM and AFM images of fractured surface morphologies of nanocomposites contain 0.3 wt % MWCNT based on epoxy systems 1 and 2. Nanocomposites containing titania coated MWCNT and uncoated MWCNT have shown a fracture mechanism known as crack front bowing, that can clearly be seen from SEM image in Figure 4. From AFM images (Table 8) a crack pinning mechanisms was noticed for the titania coated MWCNT nanocomposites, a toughening mechanism that indicates the strong interaction between the carbon nanotubes and the epoxy matrix through the coating. The toughening effect could not be clearly seen in the thermo-mechanical results due to the poor dispersion in the matrix, in all cases.


Characterization of Hybrid Epoxy Nanocomposites
SEM image of epoxy system 1 with 0.3% untreated MWCNT showing a “crack front bowing” toughening mechanism.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5304600&req=5

nanomaterials-02-00348-f004: SEM image of epoxy system 1 with 0.3% untreated MWCNT showing a “crack front bowing” toughening mechanism.
Mentions: Figure 4 and Table 8 show SEM and AFM images of fractured surface morphologies of nanocomposites contain 0.3 wt % MWCNT based on epoxy systems 1 and 2. Nanocomposites containing titania coated MWCNT and uncoated MWCNT have shown a fracture mechanism known as crack front bowing, that can clearly be seen from SEM image in Figure 4. From AFM images (Table 8) a crack pinning mechanisms was noticed for the titania coated MWCNT nanocomposites, a toughening mechanism that indicates the strong interaction between the carbon nanotubes and the epoxy matrix through the coating. The toughening effect could not be clearly seen in the thermo-mechanical results due to the poor dispersion in the matrix, in all cases.

View Article: PubMed Central - PubMed

ABSTRACT

This study focused on the effect of Multi Wall Carbon Nanotubes (MWCNT) content and its surface treatment on thermo-mechanical properties of epoxy nanocomposites. MWCNTs were surface treated and incorporated into two epoxy systems. MWCNT's surface treatments were based on: (a) Titania coating obtained by sol-gel process and (b) a nonionic surfactant. Thermo-mechanical properties improvement was obtained following incorporation of treated MWCNT. It was noticed that small amounts of titania coated MWCNT (0.05 wt %) led to an increase in the glass transition temperature and stiffness. The best performance was achieved adding 0.3 wt % titania coated MWCNT where an increase of 10 °C in the glass transition temperature and 30% in storage modulus were obtained.

No MeSH data available.