Effect of High Pressure Treatment on Poly(lactic acid)/Nano–TiO2 Composite Films
Abstract
:1. Introduction
2. Results and Discussion
2.1. FTIR
2.2. SEM
2.3. Mechanical Performances
2.4. DSC
2.5. Water Vapor Permeability (WVP)
2.6. Oxygen Transmission Rate (OTR)
3. Materials and Methods
3.1. Materials
3.2. Preparation of Nanocomposites
3.3. Fourier Transform Infrared
3.4. Scanning Electron Microscopy
3.5. Mechanical Performances
3.6. Differential Scanning Calorimetry
3.7. Water Vapor Permeability
3.8. Oxygen Transmission Rate
4. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Sample Availability: Samples of the compounds are not available from the authors. |
AgNPs (wt%) | Pressure (MPa) | TS (MPa) | EM (MPa) | ε (%) |
---|---|---|---|---|
0 | 0 | 30.71 ± 1.18 b | 1265.4 ± 71.3 e | 83.7 ± 5.21 a |
0 | 300 | 31.32 ±0.94a,b | 1327.3 ± 82.2 d,e | 79.1 ± 5.86 a,b |
1 | 0 | 32.71 ± 1.47 a,b | 1455.5 ± 56.3 c,d,e | 78.2 ± 6.51 a,b |
1 | 300 | 33.85 ± 2.41 a,b | 1515.3 ± 96.9 b,c,d,e | 70.6 ± 7.32 a,b,c |
5 | 0 | 33.50 ± 1.16 a,b | 1669.9 ± 87.7 a,b,c | 75.9 ± 5.58 a,b,c |
5 | 300 | 34.74 ± 1.47 a,b | 1841.5 ± 72.6 a | 67.9 ± 6.59 b,c |
10 | 0 | 34.89 ± 1.19 a,b | 1723.5 ± 85.3 a,b,c | 72.1 ± 6.81 a,b,c |
10 | 300 | 36.08 ± 1.25 a,b | 1874.2 ± 90.2 a | 64.2 ± 4.62 c |
15 | 0 | 33.95 ± 1.75 a,b | 1692.1 ± 102.4 a,b,c | 73.3 ± 5.02 a,b,c |
15 | 300 | 36.17 ± 1.96 a | 1783.3 ± 103.3 a,b | 67.8 ± 4.88 b,c |
20 | 0 | 32.45 ± 1.42 a,b | 1596.2 ± 96.8 a,b,c,d | 75.2 ± 5.12 a,b,c |
20 | 300 | 33.72 ± 1.78 a,b | 1687.1 ± 88.2 a,b,c | 72.1 ± 5.67 a,b,c |
Samples (wt%) | Pressure (MPa) | Tg (°C) | Tc (°C) | Tm (°C) | Xc (%) |
---|---|---|---|---|---|
0 | 0 | 45.2 | 112.2 | 168.2 | 14.5 |
0 | 300 | 45.8 | 108.3 | 172.1 | 18.3 |
1 | 0 | 47.8 | 109.5 | 165.1 | 15.3 |
1 | 300 | 49.3 | 108.8 | 166.4 | 17.9 |
5 | 0 | 48.5 | 116.2 | 168.4 | 15.8 |
5 | 300 | 49.8 | 109.6 | 168.3 | 19.2 |
10 | 0 | 49.7 | 105.2 | 168.4 | 18.7 |
10 | 300 | 48.8 | 102.5 | 168.5 | 22.4 |
15 | 0 | 48.7 | 100.1 | 165.6 | 18.1 |
15 | 300 | 51.2 | 103.9 | 166.4 | 22.2 |
20 | 0 | 50.0 | 101.3 | 166.2 | 17.6 |
20 | 300 | 48.8 | 107.1 | 166.6 | 23.6 |
TiO2 Content % | WVP (g·m)/(m2·s·Pa) | |
---|---|---|
Before High Pressure Treatment | After High Pressure Treatment | |
0 | 5.28 ± 0.08 b | 4.81 + 0.17 a |
1 | 4.86 ± 0.14 b | 3.69 + 0.10 a |
5 | 4.22 ± 0.16 b | 3.46 + 0.32 a |
10 | 4.78 ± 0.26 b | 4.12 + 0.15 a |
15 | 5.13 ± 0.10 b | 4.40 + 0.12 a |
20 | 5.33 ± 0.17 b | 4.97 + 0.18 a |
TiO2 Content % | OTR [(cm3/(24 h × m2)] × (cm/bar) | |
---|---|---|
Before High Pressure Treatment | After High Pressure Treatment | |
0 | 4.39 ± 0.06 b | 4.02 +0.18 a |
1 | 3.82 ± 0.11 b | 3.53 + 0.12 a |
5 | 3.27 ± 0.14 b | 2.92 + 0.13 a |
10 | 3.56 ± 0.11 b | 3.28 + 0.09 a |
15 | 3.99 ± 0.14 b | 3.67 + 0.15 a |
20 | 4.30 ± 0.08 b | 3.98 + 0.21 a |
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Chi, H.; Li, W.; Fan, C.; Zhang, C.; Li, L.; Qin, Y.; Yuan, M. Effect of High Pressure Treatment on Poly(lactic acid)/Nano–TiO2 Composite Films. Molecules 2018, 23, 2621. https://doi.org/10.3390/molecules23102621
Chi H, Li W, Fan C, Zhang C, Li L, Qin Y, Yuan M. Effect of High Pressure Treatment on Poly(lactic acid)/Nano–TiO2 Composite Films. Molecules. 2018; 23(10):2621. https://doi.org/10.3390/molecules23102621
Chicago/Turabian StyleChi, Hai, Wenhui Li, Chunli Fan, Cheng Zhang, Lin Li, Yuyue Qin, and Minglong Yuan. 2018. "Effect of High Pressure Treatment on Poly(lactic acid)/Nano–TiO2 Composite Films" Molecules 23, no. 10: 2621. https://doi.org/10.3390/molecules23102621
APA StyleChi, H., Li, W., Fan, C., Zhang, C., Li, L., Qin, Y., & Yuan, M. (2018). Effect of High Pressure Treatment on Poly(lactic acid)/Nano–TiO2 Composite Films. Molecules, 23(10), 2621. https://doi.org/10.3390/molecules23102621