| Abstract:In this study， fiber reinforced starch-based foam materials were prepared with corn starch as raw material and pretreated softwood fibers as reinforcement. The results showed that the mechanical properties and pore structure of starch-based foam materials were greatly improved after adding a small amount of softwood fibers. When the starch content was 4.5% and the softwood fibers content was 1.5%， the compressive strength of the material reached the maximum of 4.66 MPa. At this time， the porosity of the material was 88% and the density was 0.13 g/cm3. The adsorption results showed that the starch-based foam materials mainly absorbed water. Then， the corn starch was hydrophobic modified by esterification， and the fiber reinforced starch-based foam materials with hydrophobic modification were prepared with softwood fibers as reinforcement. When the dosage of hydrochloric acid was same， the dosage of stearic acid was 6 g， the tensile strength reached the maximum of 0.25 MPa. When the dosage of stearic acid was 4 g， the compressive strength reached the maximum of 4.76 MPa. Thus， compared to the materials before modification， both the mechanical properties and hydrophobicity of hydrophobic modified materials were improved. The oil-water ratio of adsorption was also improved， so that the materials had a certain lipophilicity. |
