Effect of Aluminate Coupling Agent Modified Nano-MICA Powder on PLA/PBAT System

ZHANG Chuang-chuang, LIN Qin-bao, LU Da-yong, ZHONG Huai-ning, CHENG Juan

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Plastics Science and Technology ›› 2024, Vol. 52 ›› Issue (02) : 84-89. DOI: 10.15925/j.cnki.issn1005-3360.2024.02.018
Biological and Degradable Material

Effect of Aluminate Coupling Agent Modified Nano-MICA Powder on PLA/PBAT System

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Abstract

Nanocomposite films were prepared by melting and blending nano-MICA powder modified with polylactic acid (PLA), polybutylene adipate-co-terephthalate (PBAT) and aluminate coupling agent. The properties of nanocomposite films were characterized by a Fourier transform infrared spectroscopy (FTIR), a water vapor transmittance tester, an oxygen transmittance tester, and TG-DSC synchronous thermal analysis instrument. The safety of nanocomposites was evaluated by total migration experiments and gas chromatography-mass spectrometry (GC-MS) to determine the specific migration of nanocomposites. The results show that the aluminate coupling agent successfully activates the nano-MICA powder. The glass transition temperature of PLA can be increased by modified nano-MICA powder, while the crystallinity of PLA first increases and then decreases, and the addition of 0.2% modified nano-MICA powder has the best effect. The thermal stability of the PLA/PBAT system decreases slightly with the increase of the amount of modified nano-MICA powder. The addition of 0.2% modified nano-MICA powder reduced the water vapor transmission coefficient of the film by 28%. The addition of nano-MICA powder enhances the interface roughness of the film, and the addition of modified nano-MICA powder can still meet the safety requirements as a food contact material.

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Nano-MICA powder / Polylactic acid / Thermal property / Safety

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ZHANG Chuang-chuang , LIN Qin-bao , LU Da-yong , et al . Effect of Aluminate Coupling Agent Modified Nano-MICA Powder on PLA/PBAT System. Plastics Science and Technology. 2024, 52(02): 84-89 https://doi.org/10.15925/j.cnki.issn1005-3360.2024.02.018

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