Chem. J. Chinese Universities ›› 2024, Vol. 45 ›› Issue (12): 20240323.doi: 10.7503/cjcu20240323
• Polymer Chemistry • Previous Articles Next Articles
SHI Lingrui, WU Xiaoyu, CAO Hailiang, HE Wentao()
Received:
2024-07-01
Online:
2024-12-10
Published:
2024-10-11
Contact:
HE Wentao
E-mail:wentaohe@aliyun.com
Supported by:
CLC Number:
TrendMD:
SHI Lingrui, WU Xiaoyu, CAO Hailiang, HE Wentao. Preparation of Phosphorus and Nitrogen Modified Halloysite Nanotube and Its Effects on the Flame Retardant, Mechanical and Ultroviolet Shielding Properties of Polylactic Acid[J]. Chem. J. Chinese Universities, 2024, 45(12): 20240323.
Sample | Si(%) | Al(%) | C(%) | O(%) | P(%) | N(%) |
---|---|---|---|---|---|---|
HNT | 16.71 | 13.73 | 8.42 | 61.14 | — | — |
PHNT | 4.03 | 7.01 | 46.68 | 33.80 | 8.48 | — |
HM@PHNT | 6.45 | 4.87 | 34.05 | 40.69 | 6.86 | 7.08 |
Table 1 Atomic fraction(%) of Si, Al, C, O, P and N from the XPS spectra of HNT, PHNT and HM@PHNT
Sample | Si(%) | Al(%) | C(%) | O(%) | P(%) | N(%) |
---|---|---|---|---|---|---|
HNT | 16.71 | 13.73 | 8.42 | 61.14 | — | — |
PHNT | 4.03 | 7.01 | 46.68 | 33.80 | 8.48 | — |
HM@PHNT | 6.45 | 4.87 | 34.05 | 40.69 | 6.86 | 7.08 |
Sample | Tg/℃ | Tc /℃ | Tm1/℃ | Tm2/℃ | Hcc/(J∙g-1) | Hm/(J∙g-1) | Xc(%) |
---|---|---|---|---|---|---|---|
PLA | 62.1 | — | 160.1 | — | 0 | 7.2 | 7.7 |
PLA/PHNT | 62.8 | 101.8 | 156.3 | 161.2 | 7.8 | 29.5 | 23.2 |
PLA/HM@PHNT | 63.0 | 97.3 | 153.7 | 160.8 | 15.5 | 35.3 | 21.2 |
Table 2 Results from the DSC curves of PLA and PLA composites
Sample | Tg/℃ | Tc /℃ | Tm1/℃ | Tm2/℃ | Hcc/(J∙g-1) | Hm/(J∙g-1) | Xc(%) |
---|---|---|---|---|---|---|---|
PLA | 62.1 | — | 160.1 | — | 0 | 7.2 | 7.7 |
PLA/PHNT | 62.8 | 101.8 | 156.3 | 161.2 | 7.8 | 29.5 | 23.2 |
PLA/HM@PHNT | 63.0 | 97.3 | 153.7 | 160.8 | 15.5 | 35.3 | 21.2 |
Sample | TTI/s | PHRR/ (kW∙m-2) | THR/ (MJ∙m-2) | EHC/ (MJ∙kg-1) | Mean CO yield/(kg∙kg-1) | Mean CO2 yield/(kg∙kg-1) | Mass fraction of residue(%) |
---|---|---|---|---|---|---|---|
PLA | 55 | 510.1 | 72.5 | 21.3 | 0.0719 | 6.0138 | 0.6 |
PLA/PHNT | 57 | 502.4 | 73.1 | 21.7 | 0.0683 | 5.5019 | 4.9 |
PLA/HM@PHNT | 51 | 472.3 | 67.5 | 20.0 | 1.6436 | 4.1953 | 8.1 |
Table 3 Results from CCT of PLA, PLA/PHNT and PLA/HM@PHNT
Sample | TTI/s | PHRR/ (kW∙m-2) | THR/ (MJ∙m-2) | EHC/ (MJ∙kg-1) | Mean CO yield/(kg∙kg-1) | Mean CO2 yield/(kg∙kg-1) | Mass fraction of residue(%) |
---|---|---|---|---|---|---|---|
PLA | 55 | 510.1 | 72.5 | 21.3 | 0.0719 | 6.0138 | 0.6 |
PLA/PHNT | 57 | 502.4 | 73.1 | 21.7 | 0.0683 | 5.5019 | 4.9 |
PLA/HM@PHNT | 51 | 472.3 | 67.5 | 20.0 | 1.6436 | 4.1953 | 8.1 |
Sample | Loading amount,mass fraction(%) | ∆ in TS(%) | ∆ in EAB(%) | ∆ inXc(%) | ∆ in PHRR(%) | ∆ in THR(%) | T300(%) | Ref. |
---|---|---|---|---|---|---|---|---|
PLA/pHNTs | 2 | +15.3 | +253.8 | +135.2 | - | - | - | [ |
PLA/zinc oxide treated HNT | 3 | +6.2 | +21.6 | - | - | - | about 20 | [ |
PLA/HNT@MAH@DOPO | 5 | - | - | +9.6 | -20.2 | -8.8 | - | [ |
PLA/DM⁃OH8 | 1.5 | -11.3 | -12.5 | - | -4.5 | -2.9 | - | [ |
PLA/PNSiHNT | 5 | +77 | +116 | - | -18 | -12 | 4.1 | [ |
PLA/HM@PHNT | 5 | +25.6 | +87.9 | 175.3 | -7.4 | -6.9 | 1.0 | This work |
Table 4 Performance comparison of various reported PLA/modified HNT composites*
Sample | Loading amount,mass fraction(%) | ∆ in TS(%) | ∆ in EAB(%) | ∆ inXc(%) | ∆ in PHRR(%) | ∆ in THR(%) | T300(%) | Ref. |
---|---|---|---|---|---|---|---|---|
PLA/pHNTs | 2 | +15.3 | +253.8 | +135.2 | - | - | - | [ |
PLA/zinc oxide treated HNT | 3 | +6.2 | +21.6 | - | - | - | about 20 | [ |
PLA/HNT@MAH@DOPO | 5 | - | - | +9.6 | -20.2 | -8.8 | - | [ |
PLA/DM⁃OH8 | 1.5 | -11.3 | -12.5 | - | -4.5 | -2.9 | - | [ |
PLA/PNSiHNT | 5 | +77 | +116 | - | -18 | -12 | 4.1 | [ |
PLA/HM@PHNT | 5 | +25.6 | +87.9 | 175.3 | -7.4 | -6.9 | 1.0 | This work |
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