Issue 62

Y. S. Rao et alii, Frattura ed Integrità Strutturale, 62 (2022) 240-260; DOI: 10.3221/IGF-ESIS.62.17

Further 30 minutes sonication (Make: Q-sonica, USA) was performed at 20 kHz to get homogeneous mix. The high frequency ultra-sonic waves promote the de-agglomeration of filler. The resultant solution was coated over ten layers of fabrics and filed up one above the other, then the stacked laminate is subjected to the vacuum pressure at 46000 N.m -2 for 20 minutes to facilitate the resin flow over the fabric and remove the excess resin if any. The post-curing was performed in a hot-air oven at 75 °C for 90 minutes followed ambient cooling for 24 hours. It is found that the thickness of the fabricated laminates was approximately 4 mm. Toughness test specimens as per dimensions shown in Fig. 1 are prepared from each laminate.

Epoxy resin + hardener (wt.%)

Carbon fabric (wt.%)

Composite code

hBN (wt.%)

MoS 2 (wt.%)

Neat-CFREC

50

50

-

-

2BN-CFREC

48

50

2

-

4BN-CFREC

46

50

4

-

6BN-CFREC

44

50

6

-

8BN-CFREC

42

50

8

-

2MoS 2 -CFREC

48

50

-

2

4MoS 2 -CFREC

46

50

-

4

6MoS 2 -CFREC

44

50

-

6

8MoS 2 -CFREC

42

50

-

8

Table 4: Constituents of the composites.

Figure 3: FTIR spectrum of neat CFREC, BN-CFREC and MoS 2 -CFREC.

FTIR spectroscopic analysis Fig. 3 indicates the FTIR spectrum of CFREC with and without filler between wavenumbers 4000 to 600 cm -1 . The IR

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