Thermoplastic starch-based biodegradable plastics reinforced  by carboxylated surface modification of nano silica

MA Hongpeng; QIN Wenbo; GUO Bin; LI Panxin

doi:10.13801/j.cnki.fhclxb.20210817.002

Volume 39 Issue 7

Jul. 2022

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MA Hongpeng, QIN Wenbo, GUO Bin, et al. Thermoplastic starch-based biodegradable plastics reinforced by carboxylated surface modification of nano silica[J]. Acta Materiae Compositae Sinica, 2022, 39(7): 3478-3484. doi: 10.13801/j.cnki.fhclxb.20210817.002

Citation:

MA Hongpeng, QIN Wenbo, GUO Bin, et al. Thermoplastic starch-based biodegradable plastics reinforced by carboxylated surface modification of nano silica[J]. Acta Materiae Compositae Sinica, 2022, 39(7): 3478-3484. doi: 10.13801/j.cnki.fhclxb.20210817.002

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Thermoplastic starch-based biodegradable plastics reinforced by carboxylated surface modification of nano silica

doi: 10.13801/j.cnki.fhclxb.20210817.002

MA Hongpeng¹,
QIN Wenbo¹,
GUO Bin^{1, 2, 3
,
,},
LI Panxin^{2, 3}

1.
College of Science, Nanjing Forestry University, Nanjing 210037, China
2.
Agricultural and Forest Products Processing Academician Workstation of Henan Province, Luohe 462600, China
3.
Post-Doctoral Research Center of Nanjiecun Group, Luohe 462600, China

Received Date: 2021-07-09
Accepted Date: 2021-08-06
Rev Recd Date: 2021-08-03

Available Online: 2021-08-17

Publish Date: 2022-07-30

Abstract

Abstract

In order to improve the mechanical properties and water resistance of thermoplastic starch (TPS), the carboxylated silica microspheres (SM-COOH) modified by coupling agent KH550 and succinic anhydride were used to prepare the SM-COOH/TPS composites by extrusion and injection molding process. The effects of different contents of SM-COOH on the mechanical properties, dynamic thermodynamics, thermal stability, surface water resistance and rheological properties of the composites were studied in details. The results show that the added SM-COOH can improve the performance of TPS. When the content of SM-COOH is 2.0wt%, the tensile strength and impact strength of the composites reach the maximum value of 12.71 MPa and 15.918 kJ/m², respectively, which are nearly 4 times and 2.6 times higher than that of pure TPS. The temperature corresponding to the maximum decomposition rate in DTG curves reaches the maximum of 322.1℃, and the peak value and equilibrium torque of the composites are moderate, which shows the better rheological processing properties. In addition, with the increased SM-COOH content, the transition temperature and surface contact angle of composites also increase. Therefore, adding the carboxylated modified nano-SiO₂ into TPS is an effective method to improve the performance of SM-COOH/TPS composites, and will be useful in the area of starch-based biodegradable plastics.
- thermoplastic starch,
- silicon dioxide,
- carboxylation modification,
- composites,
- mechanical property,
- biodegradable plastics
Long Abstrsct
Innovation Points

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References(25)

References

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