Preparation and Performance Study of PLA Composite Films Doped with PEI-functionalized Hollow Mesoporous Silica

XIN Yu, JI Jiaqi, WANG Li, HOU Jingkui, SONG Lixin, WANG Yuanxia, LI Xianliang

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Plastics Science and Technology ›› 2025, Vol. 53 ›› Issue (02) : 91-96. DOI: 10.15925/j.cnki.issn1005-3360.2025.02.017
Biological and Degradable Material

Preparation and Performance Study of PLA Composite Films Doped with PEI-functionalized Hollow Mesoporous Silica

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Abstract

Polylactic acid (PLA) is a biodegradable polymer with good biocompatibility and biodegradability, but its poor ductility, poor air tightness and other shortcomings limit its application scope. Therefore, polyethyleneimine (PEI) modified dendritic hollow mesoporous silica microspheres (PEI-HMSN) were prepared and doped into PLA matrix by solution pouring method to prepare a composite film (PLA/PEI-HMSN). The effects of thermal, optical and hydrophobic properties of composite films were studied in detail. The results showed that PEI-HMSN can be uniformly dispersed in PLA matrix, and the elongation at break and tensile strength of PLA/PEI-HMSN composite film were improved. The hydrophobicity of PLA/PEI-HMSN composite film was improved. The PEI modified HMSN can improve the performance of PLA film, which provides an experimental basis for the application of PLA in packaging field.

Key words

PLA / Silica dioxide / Hollow structure / Polyethyleneimine / Composite film

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XIN Yu , JI Jiaqi , WANG Li , et al . Preparation and Performance Study of PLA Composite Films Doped with PEI-functionalized Hollow Mesoporous Silica. Plastics Science and Technology. 2025, 53(02): 91-96 https://doi.org/10.15925/j.cnki.issn1005-3360.2025.02.017

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