Open Access

ARTICLE

Structure and Properties of PLA Composite Enhanced with Biomass Fillers from Herbaceous Plants

Haining Na^1,*, Juncheng Huang¹, Hongguang Xu², Fei Liu³, Liangke Xie¹, Baoqing Zhu³, Jiuchen Wang², Jin Zhu^1,*

1 Key Laboratory of Bio-Based Polymeric Materials of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China
2 Weifang Yunding New Material Technology Company Limited, Weifang, 262100, China
3 Jilin Hwood Technology Company Limited, Dunhua, 133712, China

* Corresponding Authors: Haining Na. Email: ; Jin Zhu. Email:

(This article belongs to the Special Issue: Natural Fibre Composites: Design, Materials Selection and Fabrication)

Journal of Renewable Materials 2023, 11(2), 491-503. https://doi.org/10.32604/jrm.2023.024181

Received 26 May 2022; Accepted 01 August 2022; Issue published 22 September 2022

Abstract

PLA composites containing biomass fillers from the three herbaceous plants such as reed, wheat stalk, and coconut fiber with length and diameter at the scale of several millimeters were prepared without using additives. The reinforcement effect on the properties of PLA/biomass filler composites is investigated. The research results show that the PLA/biomass filler composites exhibit good stiffness, flexural strength, and impact toughness. Among the three kinds of biomass fillers, reed reinforced PLA composites show optimal mechanical properties. When filled with 40%–50% reed, the flexural moduli of the composites are over 7000 MPa. Flexural strength retains at the same level of pure PLA. The notch impact strength reaches to 4.50 ± 0.73 kJ/m² , which is 2.06 times higher than that of pure PLA. Furthermore, the introduction of biomass fillers increases the crystallization ability of PLA and does not increase the water absorption of the composites. This research demonstrated that PLA composites prepared with biomass fillers from the herbaceous plants (namely herb plastic composites, HPCs) is a material with good comprehensive mechanical properties while retaining the intrinsic particularity of biological sources.

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