Crystallization of Green Poly(ε-caprolactone) Nanocomposites with Starch Nanocrystal: The Nucleation Role Switching of Starch Nanocrystal with Its Surface Acetylation
作者：Guorui Zhang, Chunjiang Xu, Defeng Wu,* Wenyuan Xie, Zhifeng Wang
關鍵字：poly(ε-caprolactone); starch nanocrystal; green composite; compatibility; nucleation.
論文來源：期刊
具體來源：Industrial & Engineering Chemistry Research
發表時間：2018年
Industrial & Engineering Chemistry Research, 2018, 57(18), 6257-6264.
ABSTRACT:
Poly(ε-caprolactone) (PCL) was filled with very small amount of starch nanocrystals (SNC), with the objective to control its crystallization. Three kinds of SNC particles, including the pristine one and the acetylated ones with low-level and middle-level substitutions, were used. Their roles acted during PCL crystallization were studied, then. The results reveal that pristine SNC acts as the nucleating agent, increasing crystallization temperature and spherulite growth rate evidently. However, nucleation activity of SNC particles reduces with their increasing level of surface acetylation. The middle-level-acetylated SNC particles even act as the role of antinucleation agent, impeding nucleation and followed spherulite growth of PCL. The phase affinity in those systems was then evaluated by the interaction energy parameter, aiming at better understanding the mechanism of role alterations of SNC particles. This work provides an interesting way to control PCL crystallization, and also opens a new door to extend applications of SNC particles.
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https://pubs.acs.org/doi/10.1021/acs.iecr.8b00514