Abstract
A new method to obtain composites of phenolic resin reinforced with microfibrillated cellulose with a wide fiber content was established and the mechanical properties were evaluated by tensile test. A linear increase in Young’s modulus was observed at fiber contents up to 40 wt%, with a stabilizing tendency for higher fiber percentages. These results were ratified by measurements of the coefficient of thermal expansion (CTE) relative to fiber content, which indicated a strong thermal expansion restriction rate below 60 wt% fiber content, indicating the effective reinforcement attained by the cellulose microfibrils. The low CTE achieved of 10 ppm/K is one of the important properties of cellulose composites.
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Abbreviations
- MFC:
-
Microfibrillated cellulose
- PF:
-
Phenol-formaldehyde
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Acknowledgements
The authors would like to thank Daicel Chemical Industries, Ltd. for support in processing the microfibrillated cellulose and Gun Ei Chemical Industry Co., Ltd. for furnishing the PF resin used in this study. The authors would also like to thank Dr. Masaya Nogi for helpful discussions. A. N. Nakagaito is indebted to the scholarship for doctoral course from the Ministry of Education, Culture, Sports, Science, and Technology, Government of Japan: MEXT and the financial support of the JSPS Postdoctoral Fellowship for Foreign Researchers from the Japan Society for the Promotion of Science.
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Nakagaito, A.N., Yano, H. The effect of fiber content on the mechanical and thermal expansion properties of biocomposites based on microfibrillated cellulose. Cellulose 15, 555–559 (2008). https://doi.org/10.1007/s10570-008-9212-x
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DOI: https://doi.org/10.1007/s10570-008-9212-x