Journal
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
Volume 183, Issue -, Pages 45-54Publisher
ELSEVIER
DOI: 10.1016/j.ijbiomac.2021.04.104
Keywords
Biodegradable; Poly(lactic acid); Basalt fiber
Funding
- National Key Research and Development Program of China [2016YFC0501402]
- Chinese Academy of Sciences (Changchun Branch) [2020SYHZ0002, 2020SYHZ0047]
- Science and Technology Services Network Programof Chinese Academy of Sciences (STS Project) [KFJ-STS-ZDTP-082]
- National Science Foundation of Zhejiang Province of China [LQY19B040001]
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The study showed that basalt fiber and basalt fiber powder played crucial roles in PLA composites, promoting crystallization, enhancing mechanical properties, and significantly improving heat resistance properties.
The poly(lactic acid) (PLA) composites with the silane coupling agent treated basalt fiber (SBF) and basalt fiber powder (SBFP) were prepared. The crystalline morphology, mechanical properties, and heat resistance of PLA/SBF/SBFP composites were investigated. The results indicated that SBF or SBFP not only acted as heterogeneous nucleating agents for PLA crystallization but also improved the mechanical properties and heat resistance of PLA. Morphological analyses showed that SBFP could play nucleating role to reduce the spherulites size of PLA, and SBF could restrict the mobility of PLA chains and construct interface crystallization for PLA during isothermal crystallization process. The composites with higher SBF loading, the Transcrystalline-network built in the com-posites significantly improved the heat resistance properties of PLA. Due to the synergistic effect of SBF and SBFP, the PLA/SBF/SBFP composites showed high heat deformation temperature (HDT), especially after isothermal crystallization, the HDT increased to 150.5 degrees C for the PLA/SBF/SBFP 50/10/40 composite, much higher (about 190%) than that of pure PLA (71.7 degrees C). (C) 2021 Elsevier B.V. All rights reserved.
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