Effects of Lithium Chloride (LiCl) on Polyimide Microspheres Morphologies

Jun-ping DUAN; Miao-qing LIU

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Effects of Lithium Chloride (LiCl) on Polyimide Microspheres Morphologies

更新时间：2022-09-18

- Effects of Lithium Chloride (LiCl) on Polyimide Microspheres Morphologies
- Polymer Bulletin Vol. 27, Issue 11, Pages: 95-100(2014)
- 作者机构：
  
  太原理工大学煤科学与技术教育部及山西省重点实验室化学工程系，太原　030024
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2014-11，
  
  Received：09 April 2014，
  
  Revised：02 July 2014，
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Jun-ping DUAN, Miao-qing LIU. Effects of Lithium Chloride (LiCl) on Polyimide Microspheres Morphologies. [J]. Polymer Bulletin 27(11):95-100(2014)
DOI：

Jun-ping DUAN, Miao-qing LIU. Effects of Lithium Chloride (LiCl) on Polyimide Microspheres Morphologies. [J]. Polymer Bulletin 27(11):95-100(2014) DOI：

摘要

以两步法为基础，采用非水乳液体系，先通过单体聚合得到聚酰胺酸溶液(PAA)，然后经酰亚胺化使 PI微球化，成功得到PI微球。利用傅立叶变换红外光谱(FT-IR)、扫描电子显微镜(SEM)、热失重分析仪 (TGA)等手段表征了 PI微球的化学结构和微观形貌，探讨了在制备过程中加入碱金属盐LiCl对PI微球化形态的影响。研究结果表明，LiCl的加入使得PI微球聚集态形貌出现孔隙结构，而当LiCl浓度达到临界点时，聚合物基体的孔隙率增加，形貌呈均匀的微孔状“海绵”结构。此外，通过热分析得出，Li盐的加入对微球的热稳定性几乎没有影响。

Abstract

In this article

we successfully prepared polyimide (PI) microspheres via polymerization

following the two- steps imidization. The microstructure

morphology

and thermal property were characterized by infrared spectroscopy (FT- IR)

scanning electron microscopy (SEM)

and thermogravimetric analyzer (TGA)

respectively. The results showed the addition of LiCl to PAA-DMF solutions had s significant effects on PI microspheres morphology. At a given polymer concentration

the increase of LiCl content reduced the salvation power of DMF for PAA

leading to the increases of PI microspheres porosity and the decreases of pore size. At the higher Li concentrations

the PI microspheres showed finely porous structure with sponge-like. Additionally

the addition of LiCl had no effect on the thermal properties of PI microspheres.

关键词

聚酰亚胺氯化锂微球作用力粘度

Keywords

PolyimideLiClMicrospheresInteractionsViscosity

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