Engineering Research Center for Biomedical Materials of Ministry of Education, East China University of Science and Technology, Shanghai, 200237, PR China.
Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, PR China; Engineering Research Center for Biomedical Materials of Ministry of Education, East China University of Science and Technology, Shanghai, 200237, PR China.
Carbohydr Polym. 2021 Feb 1;253:117168. doi: 10.1016/j.carbpol.2020.117168. Epub 2020 Oct 22.
We report a modified starch-poly(butylene adipate co-terephthalate) (PBAT) film (MSPF) prepared by extrusion blowing. Polyurethane prepolymer (PUP), was modified to the starch to enhance the compatibility. Different contents of amylose was blended with PBAT for improving mechanical strength and oxygen-barrier properties of MSPF. The microstructures, crystallinity, mechanical properties, oxygen-barrier capacity of MSPF were thoroughly evaluated. The result showed that MSPF with high starch content and excellent performances was successfully prepared with the synergy of PUP modification, amylose introduction and extrusion blowing. The crystallinity, hydrophobicity, oxygen-barrier properties and mechanical properties of MSPF increased with the increasing amylose content. The maximum tensile strength and elongation at break of MSPF reached 10.6 MPa and 805.6 %, respectively, even at the high starch content of 50 %. The result demonstrated that MSPF having excellent mechanical properties and oxygen-barrier properties could be use in the biodegradable field such as packaging materials, agricultural films and garbage bags.
我们报告了一种通过挤出吹塑制备的改性淀粉-聚（己二酸丁二醇酯-co-对苯二甲酸丁二醇酯）（PBAT）薄膜（MSPF）。将聚氨酯预聚物（PUP）改性到淀粉中以增强其相容性。将不同含量的直链淀粉与 PBAT 共混，以提高 MSPF 的机械强度和氧气阻隔性能。对 MSPF 的微观结构、结晶度、力学性能和氧气阻隔性能进行了全面评估。结果表明，通过 PUP 改性、直链淀粉引入和挤出吹塑的协同作用，成功制备了具有高淀粉含量和优异性能的 MSPF。随着直链淀粉含量的增加，MSPF 的结晶度、疏水性、氧气阻隔性能和力学性能均有所提高。MSPF 的最大拉伸强度和断裂伸长率分别达到 10.6 MPa 和 805.6%，即使在 50%的高淀粉含量下也是如此。结果表明，具有优异力学性能和氧气阻隔性能的 MSPF 可用于包装材料、农用薄膜和垃圾袋等可生物降解领域。
