J0407-2-3 シルクフィブロインをマトリクス材料に用いたグリーンコンポジットの成形と機械的特性(バイオマス由来材料の成形加工と特性評価(2))

Abstract

The utilization renewable resource "biomass" becomes more important in recent society. Silk fiber is one kind of natural material and which possess high tensile strength and remarkable elongation property. Although silk is expensive material, many waste silk are discharged as mill ends in silk textile factory. Therefore the recycling of waste silk contributes efficient utilization of natural resource and it lower cost of material. To make fibroin compact, silk fibroin was dissolved in neutral salt solution and dried to make powder. In addition, to enhance mechanical strength of fibroin compact, silk fabric was inserted into fibroin compact to make all-fibroin composite. Herein, degummed silk fiber was dissolved by CaCl_2/ethanol/water solution and dialyzed in distilled water and was freeze-dried to obtain fibroin powder. Silk fabric and fibroin powder were laminated alternatively and were moisturized. They were hot-pressed in mold at 80℃ 0.5 hour and then at 150℃ 2.5 hour. Thus all-silk fibroin composite was obtained. Tensile strength of composite was measured and dependency on molding conditions and fiber content was considered.