School of Chemistry & Chemical Engineering, Yangzhou University, Jiangsu Province, Yangzhou, 225002, PR China.
School of Chemistry & Chemical Engineering, Yangzhou University, Jiangsu Province, Yangzhou, 225002, PR China; Institution of Innovative Materials & Energy, Yangzhou University, Yangzhou, Jiangsu Province, 225002, PR China.
Carbohydr Polym. 2020 Jan 1;227:115341. doi: 10.1016/j.carbpol.2019.115341. Epub 2019 Sep 19.
Starch nanocrystal (SNC), was used as the third component to prepare nanocomposites with biodegradable poly(β-hydroxybutyrate)/poly(butylene succinate) (PHB/PBS) blend. The results reveal that SNC shows strong nucleation to the two matrix polymers. However, the crystallization temperature of PHB is highly dependent on the SNC loadings, whereas that of PBS not. This is because SNCs have preferential localization in the immiscible matrix polymers: mainly dispersed in the continuous PHB phase and on PHB/PBS phase interfaces. Therefore, alteration trend of crystallization temperatures can be used as good probe to evaluate selective localization of SNCs in the immiscible blends containing two semicrystalline polymers. The nucleation activities of SNCs, and their interaction energy densities in the two polyesters, as well as the tensile behaviors of ternary nanocomposites, were then detected, aiming at establishing a simple route to prepare green nanocomposites with tailorable multi-phase morphology and balanced mechanical properties using starch and biodegradable aliphatic polyester blends.
淀粉纳米晶（SNC）被用作第三组分，与可生物降解的聚（β-羟基丁酸酯）/聚丁二酸丁二醇酯（PHB/PBS）共混物制备纳米复合材料。结果表明，SNC 对两种基体聚合物均具有很强的成核作用。然而，PHB 的结晶温度高度依赖于 SNC 的负载量，而 PBS 的结晶温度则不受影响。这是因为 SNC 优先定位于不混溶的基体聚合物中：主要分散在连续的 PHB 相中以及 PHB/PBS 相界面上。因此，结晶温度的变化趋势可用作评估 SNC 在含有两种半结晶聚合物的不混溶共混物中选择性定位的良好探针。然后检测了 SNC 的成核活性及其在两种聚酯中的相互作用能密度，以及三元纳米复合材料的拉伸性能，旨在建立一种使用淀粉和可生物降解脂肪族聚酯共混物制备具有可定制多相形态和平衡力学性能的绿色纳米复合材料的简单途径。
