School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, China.
College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang 110866, China.
Int J Mol Sci. 2024 Jun 7;25(12):6301. doi: 10.3390/ijms25126301.
Three types of starch with different amylose content were esterified and blended with polybutylene succinate (PBS) to obtain esterified manioc starch/PBS (EMS/PBS), esterified corn starch/PBS (ECS/PBS), and esterified waxy corn starch/PBS (EWS/PBS) composites. The EMS/PBS and ECS/PBS composites with high amylose content displayed typical V-type crystal structures. The original crystals of EWS, which had low amylose content, were disrupted during the esterification process. EWS exhibited the strongest interaction with PBS and the most favorable interface compatibility. The pyrolysis temperature was in order of EMS/PBS < ECS/PBS < EWS/PBS. The elongation at break of the three blends was higher than that of pure PBS. The esterification and plasticization of the EWS/PBS composite were the most comprehensive. The EWS/PBS composite showed the lowest storage modulus (G') and complex viscosity (η*). The interfacial bonding force of the composite materials increased with more amylopectin, decreasing intermolecular forces and destroying crystal structures, which decreased G' and η* and increased toughness. The EWS/PBS composite, with the least amylose content, had the best hydrophobicity and degradation performance.
三种不同直链淀粉含量的淀粉经酯化后与聚丁二酸丁二醇酯（PBS）共混，得到酯化木薯淀粉/PBS（EMS/PBS）、酯化玉米淀粉/PBS（ECS/PBS）和酯化蜡质玉米淀粉/PBS（EWS/PBS）复合材料。高直链淀粉含量的 EMS/PBS 和 ECS/PBS 复合材料显示出典型的 V 型晶体结构。直链淀粉含量低的 EWS 的原始晶体在酯化过程中被破坏。EWS 与 PBS 的相互作用最强，界面相容性最好。热裂解温度顺序为 EMS/PBS<ECS/PBS<EWS/PBS。三种共混物的断裂伸长率均高于纯 PBS。EWS/PBS 复合材料的酯化和增塑作用最为全面。EWS/PBS 复合材料的储能模量（G'）和复数黏度（η*）最低。复合材料的界面结合力随支链淀粉含量的增加而增大，从而降低了分子间作用力，破坏了晶体结构，降低了 G'和 η*，提高了韧性。直链淀粉含量最低的 EWS/PBS 复合材料具有最好的疏水性和降解性能。
