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采用离子液体1-丁基-3-甲基咪唑氯盐{[BMIM]Cl}溶解棉秆纤维(CSF)制成溶剂,将棉秆皮纤维作为增强材料与所制得的溶剂复合制备全纤维素复合材料(ACC)。考察了温度、纤维素质量分数对纤维素/[BMIM]Cl体系黏度和复合材料力学性能的影响。采用偏光热台显微镜、扫描电镜(SEM)、X射线衍射(XRD)、FT-IR对棉秆纤维的溶解及复合材料结构进行表征。结果表明:在同一温度下,纤维素/[BMIMI]Cl体系黏度随着纤维素质量分数的增加呈现剧增趋势;在同一质量分数下,其黏度随着温度的升高呈下降趋势。当温度为105℃、纤维素溶液质量分数为8%时,全纤维素复合材料的拉伸强度达到最大值,为45.23 MPa。
An ionic liquid 1-butyl-3-methylimidazolium chloride salt [[BMIM] Cl} was used to dissolve the cotton stalk fiber (CSF) into a solvent. Cotton fiber as a reinforcing material and the obtained solvent were combined to prepare whole fiber Composites (ACC). The effects of temperature and cellulose mass fraction on the viscosity of cellulose / [BMIM] Cl system and the mechanical properties of the composites were investigated. The dissolution of cotton stalk fiber and the composite structure were characterized by polarized hot-stage microscope, scanning electron microscope (SEM), X-ray diffraction (XRD) and FT-IR. The results showed that at the same temperature, the viscosity of cellulose / [BMIMI] Cl system increased sharply with the increase of cellulose mass fraction. At the same mass fraction, the viscosity of cellulose / [BMIMI] Cl decreased with the increase of temperature. When the temperature was 105 ℃ and the mass fraction of cellulose solution was 8%, the tensile strength of the whole cellulose composite reached the maximum value of 45.23 MPa.