中国塑料 ›› 2022, Vol. 36 ›› Issue (1): 9-14.DOI: 10.19491/j.issn.1001-9278.2022.01.002

• 材料与性能 • 上一篇    下一篇

纳米CoFe2O4的制备及其对PLA结晶性能的影响

毛晨1,3, 刘番1,3, 鄂毅2,3, 邹姝燕2,3, 龚兴厚1,2,3()   

  1. 1.湖北工业大学绿色轻工材料湖北省重点实验室,武汉 430068
    2.湖北工业大学绿色轻质材料与加工湖北工业大学协同创新中心,武汉 430068
    3.湖北工业大学材料与化学工程学院,武汉 430068
  • 收稿日期:2021-08-04 出版日期:2022-01-26 发布日期:2022-01-21

Preparation and effect of nano CoFe2O4 on crystallization performance of PLA

MAO Chen1,3, LIU Fan1,3, E Yi2,3, ZOU Shuyan2,3, GONG Xinghou1,2,3()   

  1. 1.Hubei Provincial Key Laboratory of Green Light Industrial Materials,Hubei University of Technology,Wuhan 430068,China
    2.Hubei University of Technology Collaborative Innovation Center of Green Light Materials and Processing,Hubei University of Technology,Wuhan 430068,China
    3.Materials and Chemistry Engineering College,Hubei University of Technology,Wuhan 430068,China
  • Received:2021-08-04 Online:2022-01-26 Published:2022-01-21
  • Contact: GONG Xinghou E-mail:gongxh@mail.hbut.edu.cn

摘要:

为了实现聚乳酸(PLA)的功能化改性,将其进行改性探究PLA的结晶行为,采用了化学共沉淀法制备了油酸包覆的CoFe2O4纳米粒子,同时采用溶液浇铸法制备了PLA/CoFe2O4复合材料。使用傅里叶变换红外光谱(FTIR)、透射电子显微镜(TEM)和X射线衍射仪(XRD)对CoFe2O4粒子及其复合材料的组成和结构进行分析;采用XRD、差示扫描量热仪(DSC)和偏光显微镜(PLM)对复合材料的结晶行为进行了分析。结果表明,CoFe2O4颗粒(10~20 nm)在PLA中均匀分散且无明显的团聚现象,少量的(≤1.5 %)CoFe2O4粒子对PLA结晶有明显的异相成核效应,促进PLA基体结晶,在实验条件下结晶度最多提高了207 %,而过量的CoFe2O4粒子对结晶具有一定的阻碍作用。

关键词: 聚乳酸, 油溶性, CoFe2O4, 复合材料, 结晶

Abstract:

To realize the functionalization of PLA, the crystallization behavior of the modified PLA was investigated intensively. CoFe2O4 nanoparticles coated with oleic acid were first prepared using a chemical co?precipitation method, and then the PLA/CoFe2O4 composites were prepared using a solution casting method. The composition and structure of CoFe2O4 particles and the composites were investigated using Fourier transform infrared spectroscopy(FTIR), transmission electron microscope(TEM), and X?ray diffractometer (XRD), and the crystallization behavior of the composites were analyzed using XRD, differential scanning calorimeter(DSC) and polarizing microscope(PLM). The results indicated that the CoFe2O4 particles (10~20 nm) were uniformly dispersed in PLA without obvious agglomeration. A small amount (≤1.5 %) of CoFe2O4 particles could generate a significant heterogeneous nucleation effect on the crystallinity of PLA, promoting its crystallization and improving its crystallinity. With a maximum increase of 207 %, the excessive CoFe2O4 particle content generated a hindering effect on the crystallization of PLA.

Key words: polylactic acid, oil soluble, CoFe2O4, composite, crystallization

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