4.7 Article

Morphology and properties of thermoplastic starch blended with biodegradable polyester and filled with halloysite nanoclay

Journal

CARBOHYDRATE POLYMERS
Volume 242, Issue -, Pages -

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2020.116392

Keywords

Thermoplastic starch; Poly(butylene adipate-co-terephthalate); Halloysite nanotubes; Nano-biocomposites; Bioplastics; Melt blending process

Funding

  1. Thailand International Cooperation Agency (TICA)
  2. Thailand Research Fund (TRF)
  3. French Embassy in Thailand through the TICA-TRF-French Embassy Fellowship Program
  4. Graduate School, Kasetsart University, Thailand through the Graduate Program Scholarship
  5. Faculty of Agro-Industry, Kasetsart University, Thailand

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The incorporation of halloysite clay nanotubes (HNTs) into thermoplastic starch/poly(butylene adipate-co-terephthalate) (TPS/PBAT) blends has been investigated with the aim of improving the compatibility and prop-erties of the matrix. TPS/PBAT/HNTs nano-biocomposites with different TPS/PBAT weight fractions and HNTs contents were elaborated using a melt blending process, and their morphology and properties were investigated. The TPS80/PBAT20 and TPS20/PBAT80 blends exhibited dispersed phases of small droplets of PBAT or TPS, respectively, whereas the TPS50/PBAT50 blend presented a more homogeneous structure. Elongation at break of the TPS/PBAT/HNTs biocomposites with 5 wt% of HNTs significantly increased with increasing PBAT propor-tion, i.e., 6.5 %, 41.3 %, and 351.5 % for the composites based on TPS80/PBAT20, TPS50/PBAT50, and TPS20/ PBAT80, respectively. The incorporation of 5 wt% of HNTs improved compatibility and increased Young's modulus of the TPS80/PBAT20, TPS50/PBAT50, and TPS20/PBAT80 blends approx. 350 %, 142 %, and 18 %, respectively. These results demonstrate that HNTs are promising nanofillers to improve properties of TPS-based blends.

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