| Autor: |
Park CW; Institute of Forest Science, Kangwon National University, Chuncheon 24341, Korea., Han SY; Institute of Forest Science, Kangwon National University, Chuncheon 24341, Korea., Bandi R; Institute of Forest Science, Kangwon National University, Chuncheon 24341, Korea., Dadigala R; Institute of Forest Science, Kangwon National University, Chuncheon 24341, Korea., Lee EA; Department of Forest Biomaterials Engineering, Kangwon National University, Chuncheon 24341, Korea., Kim JK; Department of Forest Biomaterials Engineering, Kangwon National University, Chuncheon 24341, Korea., Cindradewi AW; Department of Forest Biomaterials Engineering, Kangwon National University, Chuncheon 24341, Korea., Kwon GJ; Institute of Forest Science, Kangwon National University, Chuncheon 24341, Korea.; Kangwon Institute of Inclusion Technology, Kangwon National University, Chuncheon 24341, Korea., Lee SH; Institute of Forest Science, Kangwon National University, Chuncheon 24341, Korea.; Department of Forest Biomaterials Engineering, Kangwon National University, Chuncheon 24341, Korea.; Kangwon Institute of Inclusion Technology, Kangwon National University, Chuncheon 24341, Korea. |
| Abstrakt: |
In this study, the effect of lignin esterification with fatty acid chloride on the properties of lignin and lignin/poly(lactic acid) (PLA) composites was investigated. Lignocellulose ( Pinus densiflora S. et Z.) was treated using a deep eutectic solvent (DES) with choline chloride (ChCl)/lactic acid (LA). From the DES-soluble fraction, DES-lignin (DL) was isolated by a regeneration process. Lignin esterification was conducted with palmitoyl chloride (PC). As the PC loading increased for DL esterification, the Mw of esterified DL (EDL) was increased, and the glass transition temperature ( T g ) was decreased. In DL or EDL/PLA composite films, it was observed that EDL/PLA had cleaner and smoother morphological characteristics than DL/PLA. The addition of DL or EDL in a PLA matrix resulted in a deterioration of tensile properties as compared with neat PLA. The EDL/PLA composite film had a higher tensile strength and elastic modulus than the DL/PLA composite film. DL esterification decreased water absorption with lower water diffusion coefficients. The effect of lignin esterification on improving the compatibility of lignin and PLA was demonstrated. These results are expected to contribute to the development of high-strength lignin composites. |
