Qiu Zhaobin, Zhu Siyu, Yang Wantai
State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
J Nanosci Nanotechnol. 2009 Aug;9(8):4961-9. doi: 10.1166/jnn.2009.1283.
Biodegradable poly(butylene succinate-co-butylene adipate) (PBSA)/carboxyl-functionalized multi-walled carbon nanotubes (f-MWNTs) nanocomposites were prepared through solution casting method with different f-MWNTs contents ranging from 0.5 to 2 wt%. Scanning electron microscopic observations reveal a fine dispersion of f-MWNTs throughout the PBSA matrix. Effect of f-MWNTs on the crystallization behavior of PBSA was investigated in detail via various techniques and different crystallization conditions including nonisothermal crystallization at different cooling rates and isothermal crystallization at different crystallization temperatures in this work. For both nonisothermal and isothermal melt crystallization, the addition of f-MWNTs enhances the crystallization of PBSA apparently due to their heterogeneous nucleation effect. However, the crystal structure of PBSA does not change in the nanocomposites. Moreover, an attempt was made to study the effect of the presence of f-MWNTs and their contents on the nucleation activity and crystallizability of PBSA in the nanocomposites quantitatively.
通过溶液浇铸法制备了具有不同f-MWNTs含量（范围为0.5至2 wt%）的可生物降解聚（丁二酸丁二醇酯-共-己二酸丁二醇酯）（PBSA）/羧基官能化多壁碳纳米管（f-MWNTs）纳米复合材料。扫描电子显微镜观察表明f-MWNTs在整个PBSA基体中分散良好。在本工作中，通过各种技术和不同的结晶条件，包括在不同冷却速率下的非等温结晶和在不同结晶温度下的等温结晶，详细研究了f-MWNTs对PBSA结晶行为的影响。对于非等温熔体结晶和等温熔体结晶，由于f-MWNTs的异相成核作用，其添加明显增强了PBSA的结晶。然而，PBSA在纳米复合材料中的晶体结构并未改变。此外，还尝试定量研究f-MWNTs的存在及其含量对纳米复合材料中PBSA的成核活性和结晶能力的影响。
