期刊
CELLULOSE
卷 15, 期 4, 页码 555-559出版社
SPRINGER
DOI: 10.1007/s10570-008-9212-x
关键词
cellulose nanofibers; microfibrillated cellulose; nanocomposites; phenol formaldehyde; Young's modulus; CTE; fiber content
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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