Journal
MATERIALS
Volume 8, Issue 10, Pages 6597-6608Publisher
MDPI
DOI: 10.3390/ma8105327
Keywords
natural fiber; alkali treatment; thermal properties; mechanical performance; testing
Categories
Funding
- National Science Foundation of China [11102169]
- Natural Science Foundation Project of CQ CSTC [CSTC2015JCYJA50019]
- Fundamental Research Funds for the Central Universities [XDJK2013B019]
- State Scholarship Fund of the China Scholarship Council
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The objective of this study is to investigate the effect of surface treatment on the morphology and thermo-mechanical properties of bamboo fibers. The fibers are subjected to an alkali treatment using 4 wt % sodium hydroxide (NaOH) for 1 h. Mechanical measurements show that the present concentration has an insignificant effect on the fiber tensile strength. In addition, systematic experimental results characterizing the morphological aspects and thermal properties of the bamboo fibers are analyzed by scanning electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis, and differential scanning calorimetry. It is found that an alkali treatment may increase the effective surface area, which is in turn available for superior bonding with the matrix. Fourier transform infrared spectroscopy analysis reveals that the alkali treatment leads to a gradual removal of binding materials, such as hemicellulose and lignin from the bamboo fiber. A comparison of the curve of thermogravimetric analysis and differential scanning calorimetry for the treated and untreated samples is presented to demonstrate that the presence of treatment contributes to a better thermal stability for bamboo fibers.
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