Effect of low loadings of cellulose nanocrystals on the significantly enhanced crystallization of biodegradable poly(butylene succinate-co-butylene adipate)
Effect of low loadings of cellulose nanocrystals on the significantly enhanced crystallization of biodegradable poly(butylene succinate-co-butylene adipate)
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低载量纤维素纳米晶对可生物降解聚丁二酸丁二醇酯己二酸丁二醇酯结晶显着增强的影响
DOI：
10.1016/j.carbpol.2018.10.035
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发表时间：
2019-02-01
影响因子：
11.2
通讯作者：
Qiu, Zhaobin
中科院分区：
文献类型：
--
作者：
Li, Jingnan;Qiu, Zhaobin
采用溶液-浇铸法制备了可生物降解的聚(丁二酸丁二酸丁二醇酯-己二酸丁二酸丁二醇酯)(PBSA)/纤维素纳米晶(NC)纳米复合材料。较低的加入量显著提高了PBSA/CNC纳米复合材料的非等温和等温熔融结晶行为。在10℃/min时，非等温熔融结晶峰温度从纯PBSA的56℃明显提高到PBSA/CNC1(含1wt%CNC)纳米复合材料的63.6℃。80℃结晶半衰期从纯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，但结晶机理不变。结晶形态研究证实了PBSA球晶的成核密度增加，表明纳米碳管是一种有效的成核剂。此外，低负载量的CnC并没有改变PBSA的晶体结构。
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 degrees C for neat PBSA to 63.6 degrees C for PBSA/CNC1 (the nanocomposite containing 1 wt% CNC) at 10 degrees C/min. Crystallization half-time at 80 degrees 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.