期刊
APPLIED SCIENCES-BASEL
卷 9, 期 22, 页码 -出版社
MDPI
DOI: 10.3390/app9224892
关键词
fused deposition modeling; biocomposite; poly (lactic acid)-matrix; walnut shell; surface treatment
类别
资金
- National Nature Science Foundation of China [51705094]
- Nature Science Foundations of Guangxi province [2017JJB150072, 2018JJA160218]
This paper presents the study of the properties of objects that were fabricated with fused deposition modeling technology while using Poly (lactic acid)/Walnut shell powder (PLA/WSP) biocomposite filaments. The WSP was treated while using NaOH followed by silane. The infrared spectrum of treated and untreated WSP was characterized. The result was that thermal and mechanical properties could be improved by adjusting the concentration of silane. The experimental results showed: the surface compatibility between WSP and PLA was dramatically improved through treatment with KH550. The crystalline, thermal gravity, and thermal degradation temperatures of biocomposite with untreated WSP were improved from 1.46%, 60.3 degrees C, and 239.87 degrees C to 2.84%, 61.3 degrees C, and 276.37 degrees C for the biocomposites with treated WSP, respectively. The tensile, flexural, and compressive strengths of biocomposites were raised each by 8.07%, 14.66%, and 23.32%. With the determined silane concentration, PLA/10-15 wt.% treated WSP biocomposites were processed and tested. The results showed that the tensile strength was improved to 56.2 MPa, which is very near to that of pure PLA. Finally, the porous scaffolds with controllable porosity and pore size were manufactured.
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