The Regulation Mechanism of Alkali Metal Ions on the Preparation of Monodisperse Polyacrylonitrile Particles <italic style="font-style: italic">via</italic> Soap-free Emulsion Polymerization

Shuang Liu; Zhen-ning Qin; Xing-wang Wang; Peng-xu Wang; Wei Li; Hui-xuan Zhang; Zhong-yu Fu

doi:10.11777/j.issn1000-3304.2026.26141

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The Regulation Mechanism of Alkali Metal Ions on the Preparation of Monodisperse Polyacrylonitrile Particles via Soap-free Emulsion Polymerization

更新时间：2026-08-04

- The Regulation Mechanism of Alkali Metal Ions on the Preparation of Monodisperse Polyacrylonitrile Particles via Soap-free Emulsion Polymerization
- Acta Polymerica Sinica Pages: 1-13(2026)
- 作者机构：
  
  1.长春工业大学，化学工程学院，长白山实验室长春 130012
  2.长春工业大学，合成树脂及特种纤维教育部工程研究中心，长白山实验室长春 130012
  3.长春工业大学，吉林省碳纤维产业创新中心，长春 130012)
  4.吉林大学，长白山实验室长春 130012
- 作者简介：
  
  Hui-xuan Zhang, E-mail: huixuanzhang@ccut.edu.cn
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2026.26141
  CLC：
- CSTR：32057.14.GFZXB.2026.7660
- Received：22 April 2026，
  
  Accepted：09 June 2026，
  
  Online First：04 August 2026，
- 稿件说明：
移动端阅览
刘霜, 秦振宁, 王兴旺, 王鹏旭, 李伟, 张会轩, 付中禹. 碱金属离子在无皂乳液聚合制备单分散聚丙烯腈基粒子过程中的作用机理. 高分子学报, doi: 10.11777/j.issn1000-3304.2026.26141.

Liu, S.; Qin, Z. N.; Wang, X. W.; Wang, P. X.; Li, W.; Zhang, H. X.; Fu, Z. Y. The regulation mechanism of alkali metal ions on the preparation of monodisperse polyacrylonitrile particles via soap-free emulsion polymerization. Acta Polymerica Sinica (in Chinese), doi: 10.11777/j.issn1000-3304.2026.26141.
刘霜, 秦振宁, 王兴旺, 王鹏旭, 李伟, 张会轩, 付中禹. 碱金属离子在无皂乳液聚合制备单分散聚丙烯腈基粒子过程中的作用机理. 高分子学报, doi: 10.11777/j.issn1000-3304.2026.26141. DOI： CSTR： 32057.14.GFZXB.2026.7660.

Liu, S.; Qin, Z. N.; Wang, X. W.; Wang, P. X.; Li, W.; Zhang, H. X.; Fu, Z. Y. The regulation mechanism of alkali metal ions on the preparation of monodisperse polyacrylonitrile particles via soap-free emulsion polymerization. Acta Polymerica Sinica (in Chinese), doi: 10.11777/j.issn1000-3304.2026.26141. DOI： CSTR： 32057.14.GFZXB.2026.7660.

摘要

通过在丙烯腈和丙烯酸甲酯为单体，过硫酸铵为引发剂的无皂乳液聚合中加入碱金属离子(Li

、Na

、K

)、调节引发剂浓度以及引入离子型共聚单体，系统研究了上述因素对丙烯腈-丙烯酸甲酯共聚物(P(AN-

-MA))粒子聚并行为及粒子表面电荷构建机制的影响. 采用扫描电子显微镜、动态光散射、X射线衍射等表征手段对P(AN-

-MA)粒子的形貌、粒径分布、Zeta电位和结晶度进行表征. 实验结果表明，碱金属离子通过自身水化特性调控双电层结构，削弱了粒子间静电排斥作用，降低了P(AN-

-MA)粒子的稳定性导致聚并发生；提高引发剂浓度可增加P(AN-

-MA)粒子表面电荷密度，从而抑制聚并行为；引入离子型共聚单体改变P(AN-

-MA)粒子表面电荷的构建方式、影响粒子在分散体系中的稳定性. 本研究明确了碱金属离子在无皂乳液聚合制备单分散P(AN-

-MA)粒子过程中的作用机理.

Abstract

The effects of alkali metal ions (Li

)

initiator concentration and ionic comonomers on particle coalescence and surface charge construction were investigated in soap-free emulsion polymerization using acrylonitrile (AN) and methyl acrylate (MA) as monomers and ammonium persulfate as the initiator. The morphology

particle size distribution

zeta potential

and crystallinity of the resulting P(AN-

-MA) particles were characterized by scanning electron microscopy

dynamic light scattering

and X-ray diffraction. The experimental results demonstrated that alkali metal ions reduced the stability of the P(AN-

-MA) particles. By virtue of their hydration properties

these ions compressed the electric double layer and weakened the electrostatic repulsion between particles

thereby inducing particle coalescence. Increasing the initiator concentration effectively raised the surface charge density of the particles

thus suppressing coalescence. The mechanism of surface charge formation on P(AN-

-MA) particles was modulated by ionic comonomers

which in turn affected particle stability. This study elucidates the regulatory role of alkali metal ions in the preparation of monodisperse P(AN-

-MA) particles

via

soap-free emulsion polymerization.

关键词

Keywords

references

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The Regulation Mechanism of Alkali Metal Ions on the Preparation of Monodisperse Polyacrylonitrile Particles via Soap-free Emulsion Polymerization

DOI：10.11777/j.issn1000-3304.2026.26141

摘要

Abstract

关键词

Keywords

references