Effects of microfibrillated cellulose addition and water absorption on mechanical properties of jute/PLA composites

摘要

In this study, the effects of microfibrillated cellulose (MFC) addition and water absorption on mechanical properties of jute fiber reinforced composites were investigated. Plain woven jute fiber cloth was used as reinforcement. Polylactic acid (PLA) was used as matrix. Additions of MFC are conducted to matrix or reinforcement. Specimens were fabricated by the compression molding method. Static flexural and izod impact tests of composites were conducted. As a result, the following conclusions are obtained. The addition of MFC was effective for an improvement of flexural property. But, when the amount of MFC is too much, the mechanical properties decreased. The reason is thought that the interfacial adhesion was decreased by MFC addition. In addition, the interfacial adhesion was decreased by absorbing water. The water absorption rate increased with an increase of immersion time and adding MFC. Flexural strength decreases by water absorption, but impact strength can be improved. Impact strength with emulsion PLA almost did not change after immersion.