Hofmeister Effect on Thermo-responsive Poly(<italic style="font-style: italic">N</italic>-isopropylacrylamide) Hydrogels Grafted on Macroporous Poly(vinyl alcohol) Formaldehyde Sponges

Kai Shi; Di Sha; Jiu-Duo Xu; Xu Yang; Bao-Long Wang; Yan-Xiong Pan; Xiang-Ling Ji

doi:10.1007/s10118-019-2320-2

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Hofmeister Effect on Thermo-responsive Poly(N-isopropylacrylamide) Hydrogels Grafted on Macroporous Poly(vinyl alcohol) Formaldehyde Sponges

ARTICLE | Updated：2019-09-20

- Hofmeister Effect on Thermo-responsive Poly(N-isopropylacrylamide) Hydrogels Grafted on Macroporous Poly(vinyl alcohol) Formaldehyde Sponges
- Chinese Journal of Polymer Science Vol. 38, Issue 3, Pages: 257-267(2020)
- Affiliations：
  
  a.State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  b.University of Chinese Academy of Sciences, Beijing 100049, China
- Author bio：
  
  xlji@ciac.ac.cn
- Funds：
- DOI：10.1007/s10118-019-2320-2
  CLC：
- Received：11 May 2019，
  
  Revised：2019-6-17，
  
  Accepted：22 June 2019，
  
  Online First：20 September 2019，
  
  Published：2020-03
- Accepted：
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Citation: Shi, K.; Sha, D.; Xu, J. D.; Yang, X.; Wang, B. L.; Pan, Y. X.; Ji, X. L. Hofmeister effect on thermo-responsive poly(N-isopropylacrylamide) hydrogels grafted on macroporous poly(vinyl alcohol) formaldehyde sponges. Chinese J. Polym. Sci. 2020, 38, 257–267

Kai Shi, Di Sha, Jiu-Duo Xu, et al. Hofmeister Effect on Thermo-responsive Poly(N-isopropylacrylamide) Hydrogels Grafted on Macroporous Poly(vinyl alcohol) Formaldehyde Sponges[J]. Chinese Journal of Polymer Science, 2020, 38(3): 257-267. DOI: 10.1007/s10118-019-2320-2.
Citation: Shi, K.; Sha, D.; Xu, J. D.; Yang, X.; Wang, B. L.; Pan, Y. X.; Ji, X. L. Hofmeister effect on thermo-responsive poly(N-isopropylacrylamide) hydrogels grafted on macroporous poly(vinyl alcohol) formaldehyde sponges. Chinese J. Polym. Sci. 2020, 38, 257–267 DOI： 10.1007/s10118-019-2320-2.

Kai Shi, Di Sha, Jiu-Duo Xu, et al. Hofmeister Effect on Thermo-responsive Poly(N-isopropylacrylamide) Hydrogels Grafted on Macroporous Poly(vinyl alcohol) Formaldehyde Sponges[J]. Chinese Journal of Polymer Science, 2020, 38(3): 257-267. DOI: 10.1007/s10118-019-2320-2. DOI：

摘要

Abstract

In this work

the Hofmeister effects of nine kinds of anions at different concentrations on the lower critical solution temperature (LCST) of the macroporous thermo-responsive poly(

-isopropylacrylamide) grafted poly(vinyl alcohol) formaldehyde (PVF-

-PNIPAM) hydrogels are investigated with differential scanning calorimetry (DSC). Four kinds of anions with strong hydration

including CO

2–

and F

–

and four kinds of anions with weak hydration

including Br

–

and ClO

–

and Cl

–

as a medium anion are systematically studied and found to demonstrate the effects of the residual hydroxyl groups and network structure of PVF on the LCST values of PVF-

-PNIPAM hydrogels in comparison with that of neat PNIPAM. On the one hand

the existence of hydroxyl groups on PVF backbone promotes the solubility of grafted PNIPAM due to their hydrophilicity and hydrogen-bond interactions with water. On the other hand

the network structure of as-prepared samples restricts free movements of grafted PNIPAM chains

which results in the increase of LCST values. In addition

the difference of grafting percentage also influences the variation of LCST values of PVF-

-PNIPAM hydrogels under salt concentration.

关键词

Keywords

references

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Hofmeister Effect on Thermo-responsive Poly(N-isopropylacrylamide) Hydrogels Grafted on Macroporous Poly(vinyl alcohol) Formaldehyde Sponges

DOI：10.1007/s10118-019-2320-2

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