Department of Packaging and Materials Technology, Faculty of Agro-Industry, Kasetsart University, Bangkok 10900, Thailand.
Department of Packaging and Materials Technology, Faculty of Agro-Industry, Kasetsart University, Bangkok 10900, Thailand; Center for Advanced Studies for Agriculture and Food (CASAF), Kasetsart University, Bangkok 10900, Thailand.
Int J Biol Macromol. 2020 Dec 1;164:1037-1045. doi: 10.1016/j.ijbiomac.2020.07.169. Epub 2020 Jul 18.
This work investigated the effect of the compounding sequence and the glycerol content on poly(butylene adipate-co-terephthalate)/thermoplastic starch/zeolite 5A (PBAT/TPS/Z5A) composites. The composite pellets and films were prepared by an extrusion process using a PBAT:TPS ratio of 60:40, Z5A loading of 3 wt%, and glycerol contents of 35 and 40 parts per hundred parts of starch (phs). Prior to blown film extrusion, the composite pellets were produced by two compounding sequences: sequence I (SI)-mixing PBAT with Z5A prior to blending with TPS; sequence II (SII)-mixing TPS with Z5A before blending with PBAT. The SII compounding sequence provided improved mixing between PBAT and TPS, leading to increased continuous phase region and a reduced TPS dispersed phase size. Increasing the glycerol content decreased the viscosity and size of the TPS dispersed phase and gave rise to a more uniform dispersion of the TPS domains and Z5A particles. Compounding Z5A via the SII sequence with a glycerol content of 40 phs effectively improved the mixing and the performance of the PBAT/TPS blend.
本工作研究了复合顺序和甘油含量对聚己二酸丁二醇酯-对苯二甲酸丁二醇酯/热塑性淀粉/沸石 5A（PBAT/TPS/Z5A）复合材料的影响。采用 PBAT：TPS 为 60：40、Z5A 负载量为 3wt%、淀粉中甘油含量为 35 和 40phs 的挤出工艺制备了复合颗粒和薄膜。在吹膜挤出之前，通过两种复合顺序制备了复合颗粒：顺序 I（SI）-在与 TPS 共混之前混合 PBAT 和 Z5A；顺序 II（SII）-在与 PBAT 共混之前混合 TPS 和 Z5A。SII 复合顺序改善了 PBAT 和 TPS 之间的混合，导致连续相区域增加，TPS 分散相尺寸减小。增加甘油含量降低了 TPS 分散相的粘度和尺寸，并导致 TPS 相和 Z5A 颗粒更均匀的分散。通过 SII 序列用 40phs 的甘油复合 Z5A 可有效改善 PBAT/TPS 共混物的混合和性能。
