J. Mater. Sci. Technol. ›› 2020, Vol. 40: 24-30.DOI: 10.1016/j.jmst.2019.08.038
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Qi Wangabc*(), Wen Shiabc, Bo Zhud, Dang Sheng Subc
Received:
2019-06-09
Revised:
2019-08-14
Accepted:
2019-08-30
Published:
2020-03-01
Online:
2020-04-01
Contact:
Wang Qi
Qi Wang, Wen Shi, Bo Zhu, Dang Sheng Su. An effective and green H2O2/H2O/O3 oxidation method for carbon nanotube to reinforce epoxy resin[J]. J. Mater. Sci. Technol., 2020, 40: 24-30.
Sample | ID1/IG | ID2/IG | ID(1+2)/IG |
---|---|---|---|
CNT | 1.59 | 0.26 | 1.85 |
oCNT-1 | 1.65 | 0.24 | 1.89 |
oCNT-2 | 2.85 | 0.38 | 3.23 |
oCNT-3 | 2.51 | 0.52 | 3.03 |
Table 1 Defects situation of obtained CNTs.
Sample | ID1/IG | ID2/IG | ID(1+2)/IG |
---|---|---|---|
CNT | 1.59 | 0.26 | 1.85 |
oCNT-1 | 1.65 | 0.24 | 1.89 |
oCNT-2 | 2.85 | 0.38 | 3.23 |
oCNT-3 | 2.51 | 0.52 | 3.03 |
Sample | C (at.%) | O (at.%) | C=O (at.%) | O=C—O (at.%) | C—OH (at.%) |
---|---|---|---|---|---|
CNT | 97.71 | 2.29 | - | 1.22 | 1.07 |
oCNT-1 | 95.29 | 4.71 | 1.35 | 1.81 | 1.55 |
oCNT-2 | 96.92 | 3.08 | - | 1.76 | 1.32 |
oCNT-3 | 96.74 | 3.26 | - | 1.70 | 1.56 |
Table 2 XPS results of CNTs.
Sample | C (at.%) | O (at.%) | C=O (at.%) | O=C—O (at.%) | C—OH (at.%) |
---|---|---|---|---|---|
CNT | 97.71 | 2.29 | - | 1.22 | 1.07 |
oCNT-1 | 95.29 | 4.71 | 1.35 | 1.81 | 1.55 |
oCNT-2 | 96.92 | 3.08 | - | 1.76 | 1.32 |
oCNT-3 | 96.74 | 3.26 | - | 1.70 | 1.56 |
Sample | Tensile strength (MPa) | Young’s modulus (GPa) | Elongation at break (%) | Impact strength (kJ/m2) | K1c (MPa m1/2) | G’30b (MPa) | Tgc (°C) |
---|---|---|---|---|---|---|---|
Neat epoxya | 65.0 ± 2.4 | 2.77 ± 0.13 | 5.5 ± 0.6 | 26.3 ± 2.1 | 1.16 ± 0.10 | 757.6 | 106.9 |
CNT/epoxya | 58.0 ± 2.8 | 2.47 ± 0.05 | 5.0 ± 0.5 | 31.3 ± 2.7 | 4.03 ± 0.18 | 901.1 | 106.6 |
oCNT-1/epoxya | 69.5 ± 0.4 | 2.97 ± 0.04 | 4.8 ± 0.5 | 41.9 ± 3.1 | 3.73 ± 0.08 | 698.6 | 107.3 |
oCNT-2/epoxy | 76.1 ± 1.1 | 3.32 ± 0.14 | 5.2 ± 0.2 | 26.1 ± 2.5 | 3.71 ± 0.06 | 938.5 | 105.3 |
oCNT-3/epoxy | 73.1 ± 0.4 | 2.90 ± 0.04 | 5.9 ± 0.3 | 42.6 ± 0.6 | 4.21 ± 0.10 | 847.5 | 105.0 |
Table 3 Mechanical performances of the obtained samples.
Sample | Tensile strength (MPa) | Young’s modulus (GPa) | Elongation at break (%) | Impact strength (kJ/m2) | K1c (MPa m1/2) | G’30b (MPa) | Tgc (°C) |
---|---|---|---|---|---|---|---|
Neat epoxya | 65.0 ± 2.4 | 2.77 ± 0.13 | 5.5 ± 0.6 | 26.3 ± 2.1 | 1.16 ± 0.10 | 757.6 | 106.9 |
CNT/epoxya | 58.0 ± 2.8 | 2.47 ± 0.05 | 5.0 ± 0.5 | 31.3 ± 2.7 | 4.03 ± 0.18 | 901.1 | 106.6 |
oCNT-1/epoxya | 69.5 ± 0.4 | 2.97 ± 0.04 | 4.8 ± 0.5 | 41.9 ± 3.1 | 3.73 ± 0.08 | 698.6 | 107.3 |
oCNT-2/epoxy | 76.1 ± 1.1 | 3.32 ± 0.14 | 5.2 ± 0.2 | 26.1 ± 2.5 | 3.71 ± 0.06 | 938.5 | 105.3 |
oCNT-3/epoxy | 73.1 ± 0.4 | 2.90 ± 0.04 | 5.9 ± 0.3 | 42.6 ± 0.6 | 4.21 ± 0.10 | 847.5 | 105.0 |
Fig. 6. Storage modulus (a) and tanδ (b) vs. temperature curves of the samples (curves of neat epoxy, CNT/epoxy and oCNT-1/epoxy were taken from our previous work [18] for comparison).
Fig. 7. Viscosity vs shear rate curves for epoxy, (oCNT-1+epoxy) and (oCNT-3+epoxy) (curves of epoxy and (oCNT-1+epoxy) were taken from our previous work [18] for comparison).
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