State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
Carbohydr Polym. 2019 Feb 1;205:211-216. doi: 10.1016/j.carbpol.2018.10.035. Epub 2018 Oct 16.
Biodegradable poly(butylene succinate-co-butylene adipate) (PBSA)/cellulose nanocrystals (CNC) nanocomposites were successfully prepared via a solution and casting method at low CNC loadings. The nonisothermal and isothermal melt crystallization behaviors of PBSA/CNC nanocomposites were significantly enhanced by low loading of CNC. The nonisothermal melt crystallization peak temperature obviously increased from 56 °C for neat PBSA to 63.6 °C for PBSA/CNC1 (the nanocomposite containing 1 wt% CNC) at 10 °C/min. Crystallization half-time at 80 °C significantly decreased from 31 min for neat PBSA to 8.4 min for PBSA/CNC1. CNC apparently increased the crystallization rate of PBSA; however, the crystallization mechanism remained unchanged. The crystalline morphology study verified the enhanced nucleation density of PBSA spherulites, indicating the role of CNC as an efficient nucleating agent. In addition, low loadings of CNC did not modify the crystal structure of PBSA.
采用溶液浇铸法成功制备了低纤维素纳米晶（CNC）负载量的可生物降解聚丁二酸丁二醇酯-己二酸丁二醇酯（PBSA）/纤维素纳米晶（CNC）纳米复合材料。低含量 CNC 的加入显著提高了 PBSA/CNC 纳米复合材料的非等温及等温熔融结晶行为。非等温熔融结晶峰温度从纯 PBSA 的 56°C 明显升高到 10°C/min 时 PBSA/CNC1（含 1wt% CNC 的纳米复合材料）的 63.6°C。80°C 下结晶半时间从纯 PBSA 的 31min 显著降低到 PBSA/CNC1 的 8.4min。CNC 明显提高了 PBSA 的结晶速率，但其结晶机制保持不变。结晶形态研究证实了 PBSA 球晶成核密度的提高，表明 CNC 作为一种有效的成核剂的作用。此外，低含量的 CNC 并未改变 PBSA 的晶体结构。
