Influence of Different Inorganic Salts on Crystallization-driven Morphological Transformation of PCL-<italic style="font-style: italic">b</italic>-PEO Micelles in Aqueous Solutions

Jie-xin Yang; Wei-na He; Jun-ting Xu; Bin-yang Du; Zhi-qiang Fan

doi:10.1007/s10118-014-1512-z

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Influence of Different Inorganic Salts on Crystallization-driven Morphological Transformation of PCL-b-PEO Micelles in Aqueous Solutions

Updated：2021-06-21

- Influence of Different Inorganic Salts on Crystallization-driven Morphological Transformation of PCL-b-PEO Micelles in Aqueous Solutions
- Chinese Journal of Polymer Science Vol. 32, Issue 9, Pages: 1128-1138(2014)
- Affiliations：
  
  MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
- Author bio：
  
  **Jun-ting Xu (徐君庭), E-mail: xujt@zju.edu.cn
- Funds：
- DOI：10.1007/s10118-014-1512-z
  CLC：
- Received：05 March 2014，
  
  Revised：2014-04-24，
  
  Accepted：09 May 2014，
  
  Published：2014-09
- Accepted：
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Jie-xin Yang, Wei-na He, Jun-ting Xu, et al. Influence of Different Inorganic Salts on Crystallization-driven Morphological Transformation of PCL-b-PEO Micelles in Aqueous Solutions[J]. Chinese Journal of Polymer Science, 2014, 32(9): 1128-1138. DOI: 10.1007/s10118-014-1512-z.
DOI：

Jie-xin Yang, Wei-na He, Jun-ting Xu, et al. Influence of Different Inorganic Salts on Crystallization-driven Morphological Transformation of PCL-b-PEO Micelles in Aqueous Solutions[J]. Chinese Journal of Polymer Science, 2014, 32(9): 1128-1138. DOI: 10.1007/s10118-014-1512-z. DOI：

摘要

Abstract

Different inorganic salts

including NaSCN

NaCl

MgCl

and Na

were added into the aqueous solution containing poly(

-caprolactone)-

-poly(ethylene oxide) (PCL-

-PEO) semicrystalline micelles. The effects of inorganic salt on the micellar size and morphology were investigated with TEM and DLS. It is found that addition of NaSCN leads to increase of the micellar size

but the micelles remain to be spherical. By contrast

the other three inorganic salts can induce sphere-to-cylinder or sphere-to-lamella transformations of the PCL-

-PEO semicrystalline micelles. The alteration rate of the micellar size with the time after addition of the inorganic salts decreases in the following order: Na

NaCl ≈ MgCl

NaSCN. These results were interpreted in terms of the "salting-out" ability of the cations and anions. The anions SO

2−

and Cl

−

have a stronger "salting-out" ability

driving the morphological transformations of the micelles and leading to a rapid change in micellar size. By contrast

SCN

−

has a weaker salting-out" ability. The cations Na

and Mg

may associate with the PEO blocks

leading to a "salting-out" effect as well. However

the "salting-out" ability of cations is weaker than that of SO

2−

and Cl

−

anions

and the "salting-out" abilities of Na

and Mg

are similar.

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Related Author

Xi-xian Ke

Jun-ting Xu

Bin-yang Du

Zhi-qiang Fan

Chun-yan Wang

Qian Yuan

Shu-guang Yang

Jian Xu

Related Institution

MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering, Zhejiang University

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University

Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences

Department of Materials Science and Engineering, East China University of Science and Technology

Department of Chemistry, Waterloo Institute of Nanotechnology, University of Waterloo, 200 University Avenue West Waterloo

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Influence of Different Inorganic Salts on Crystallization-driven Morphological Transformation of PCL-b-PEO Micelles in Aqueous Solutions

DOI：10.1007/s10118-014-1512-z

摘要

Abstract

关键词

Keywords

references