State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China; Polymer Research Institute, Sichuan University, Chengdu 610065, China.
State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China; Polymer Research Institute, Sichuan University, Chengdu 610065, China.
Int J Biol Macromol. 2021 Mar 1;172:170-177. doi: 10.1016/j.ijbiomac.2021.01.062. Epub 2021 Jan 12.
As a promising biodegradable resin, poly (butylene succinate) (PBS) is often blended with starch to reduce the cost. In this paper, 1-buyl-3-methylimidazolium halide pre-plasticized corn starch (CS) was blended with PBS to prepare PBS/corn starch blend material modified by ionic liquid (PBS/CS-IL). Ionic liquid (IL) acted as plasticizer and compatibilizer, and the effects of 1-butyl-3-methylimidazolium halide with different halogen anion on PBS/Starch blends were explored. The effects of IL on the structure and tensile property of PBS/Starch blends were evaluated by FTIR, SEM, DSC, TGA and XRD, respectively. Test results showed that the addition of IL significantly reduced the crystallinity of PBS/Starch blends, and the size of starch particles in the PBS matrix was also effectively reduced. IL also acted as a compatibilizer of starch and PBS, and induced the morphology of the blends to change from "sea-island" structure to homogeneous phase. The results of the tensile test showed that compared with the PBS/Starch blend without IL, the elongation at break of PBS/CS-IL increased from 22% to 93%. This study provided a simple and feasible method for the preparation of low-cost PBS bio-composite materials, and provided theoretical support for future industrial production.
作为一种有前途的可生物降解树脂，聚丁二酸丁二醇酯（PBS）通常与淀粉混合以降低成本。本文采用 1-丁基-3-甲基咪唑卤化物对玉米淀粉（CS）进行预塑化，然后与 PBS 共混，制备了离子液体（IL）改性的 PBS/玉米淀粉共混材料（PBS/CS-IL）。离子液体（IL）既作为增塑剂又作为增容剂，研究了不同卤素阴离子的 1-丁基-3-甲基咪唑卤化物对 PBS/淀粉共混物的影响。通过傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）、差示扫描量热法（DSC）、热重分析（TGA）和 X 射线衍射（XRD）分别评估了 IL 对 PBS/Starch 共混物的结构和拉伸性能的影响。测试结果表明，IL 的加入显著降低了 PBS/Starch 共混物的结晶度，并且 PBS 基体中淀粉颗粒的尺寸也得到了有效减小。IL 还起到了淀粉和 PBS 的增容剂的作用，诱导共混物的形态从“海-岛”结构转变为均匀相。拉伸试验结果表明，与不含 IL 的 PBS/Starch 共混物相比，PBS/CS-IL 的断裂伸长率从 22%增加到 93%。本研究为低成本 PBS 生物复合材料的制备提供了一种简单可行的方法，为未来的工业生产提供了理论支持。
