Effects of Lignin on Properties of Hemicellulose/Methyl-Cellulose Composite Films

In this paper, in order to explore the effect of lignin on properties of hemicellulose/methyl-cellulose composite film, hemicellulose/lignin/methyl-cellulose composite films which were with different mass fraction of lignin successfully were prepared by using solution blending method. The morphology of the composite films was characterized. The composite films were tested for its absorbency, hydrophilicity, and tensile strength. The results showed that there was a strong interaction and good compatibility between the lignin, hemicellulose and methyl-cellulose in the composite films; the addition of lignin reduces the absorbance of the composite films and improves the water resistance of the composite films. With the increase of lignin, the tensile strength of the composite films first increases and then decreases. When the lignin content is 10%, the tensile strength of the composite film is as high as 40.95 Mpa, which is 77% higher than that without lignin.