Preparation and Characterization of Bioplastic-Based Green Renewable Composites from Tapioca with Acetyl Tributyl Citrate as a Plasticizer

Materials

Chi-Hui Tsou²  Maw-Cherng Suen¹  Wei-Hua Yao⁶  Jen-Taut Yeh³  Chin-San Wu⁴  Chih-Yuan Tsou²  Shih-Hsuan Chiu²  Jui-Chin Chen⁶  Ruo Yao Wang⁶  Shang-Ming Lin⁶  Wei-Song Hung⁵  Manuel De Guzman⁵  Chien-Chieh Hu⁵ 

[1] Department of Creative Fashion Design, Taoyuan Innovation Institute of Technology, Jhongli 32091, Taiwan; E-Mail:;Department of Materials Science and Engineering, National Taiwan University of Science and Technology, No. 43, Sec. 4, Keelung Rd., Da’an Dist., Taipei 10607, Taiwan; E-Mails:;Department of Chemical and Biochemical Engineering, Kao Yuan University, Kaohsiung County 82151, Taiwan; E-Mail:;Faculty of Materials Science and Engineering, Hubei University, Wuhan 430062, China; E-Mail:;Research and Development Center for Membrane Technology, Department of Chemical Engineering, Chung Yuan University, Chung-Li 32023, Taiwan; E-Mails:;Department of Materials and Textiles, Oriental Institute of Technology, Pan-Chiao 22064, Taiwan; E-Mails:

关键词: biodegradable;    poly(lactic acid) (PLA);    tapioca;    methylenediphenyl diisocyanate (MDI);    acetyl tributyl citrate (ATBC);   

DOI  :  10.3390/ma7085617

来源: mdpi

【 摘 要 】

Granular tapioca was thermally blended with poly(lactic acid) (PLA). All blends were prepared using a plasti-corder and characterized for tensile properties, thermal properties and morphology. Scanning electron micrographs showed that phase separation occurred, leading to poor tensile properties. Therefore, methylenediphenyl diisocyanate (MDI) was used as an interfacial compatibilizer to improve the mechanical properties of PLA/tapioca blends. The addition of MDI could improve the tensile strength of the blend with 60 wt% tapioca, from 19.8 to 42.6 MPa. In addition, because PLA lacked toughness, acetyl tributyl citrate (ATBC) was added as a plasticizer to improve the ductility of PLA. A significant decrease in the melting point and glass-transition temperature was observed on the basis of differential scanning calorimetry, which indicated that the PLA structure was not dense after ATBC was added. As such, the brittleness was improved, and the elongation at break was extended to several hundred percent. Therefore, mixing ATBC with PLA/tapioca/MDI blends did exhibit the effect of plasticization and biodegradation. The results also revealed that excessive plasticizer would cause the migration of ATBC and decrease the tensile properties.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.