单根木质纤维尺寸对高透光率纤维素复合薄膜雾度的影响

Effect of Individual Wood Fiber Dimension on Haze for High Transmittance Cellulose Composite Film

关键词:  单根木质纤维  纤维素复合薄膜  雾度  透光率

Key Words:individual wood fiber  cellulose composite film  haze  transmittance

摘要:本研究首先通过筛分获得尺寸逐渐减小的4种级分木质纤维；分别将其按照一定间距平行排列在载玻片上，探究单根木质纤维的尺寸对雾度的影响规律；最后，通过浸渍工艺将由木质纤维制备的纸张与羧甲基纤维素（carboxymethyl cellulose，简称CMC）结合，制备高透光率木质纤维/CMC复合薄膜，并探究木质纤维尺寸对薄膜光学性能的影响。结果表明，纤维尺寸与单根木质纤维和复合薄膜的光散射性能成正比，而对透光率影响不显著。随着木质纤维尺寸的减小，单根木质纤维的雾度从7.2%降低至2.9%，纤维素复合薄膜的雾度从83.1%降至71.9%。这说明大尺寸的木质纤维是制备高雾度、高透光率纤维素复合薄膜的理想原料。

Abstract:In this study， four-grade wood fibers with decreasing dimension were obtained by screening， and separately arranged in parallel on a glass slide at a certain interval to explor the effect of the individual wood fiber dimension to haze of fiber. Finally， the paper made from different-grade wood fibers was combined with carboxymethyl cellulose （CMC） by impregnation to prepare high transmittance wood fiber/CMC composite film， and the influence of wood fiber dimension on the optical properties of the composite film was uncovered. The results showed that the fiber dimension was proportional to the light scattering effect of individual wood fiber and composite film， the effect on transmittance was not significant. As the decrease of wood fiber dimension， the haze of individual wood fiber decreased from 7.2% to 2.9%， and the haze of the cellulose composite film declined from 83.1% to 71.9%， suggesting that large-size wood fiber was an ideal raw material for the preparation of high transmittance cellulose composite film with high haze.