Water-in-oil Pickering emulsion polymerization of N-isopropyl acrylamide using starch-based nanoparticles as emulsifier

Kankan Zhai; Xiaopeng Pei; Chao Wang; Yukun Deng; Ying Tan; Yungang Bai; Baichao Zhang; Kun Xu; Pixin Wang

doi:10.1016/j.ijbiomac.2019.03.107

Water-in-oil Pickering emulsion polymerization of N-isopropyl acrylamide using starch-based nanoparticles as emulsifier

Int J Biol Macromol. 2019 Jun 15:131:1032-1037. doi: 10.1016/j.ijbiomac.2019.03.107. Epub 2019 Mar 18.

Authors

Kankan Zhai¹, Xiaopeng Pei¹, Chao Wang¹, Yukun Deng², Ying Tan³, Yungang Bai², Baichao Zhang², Kun Xu⁴, Pixin Wang¹

Affiliations

¹ Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China; University of Science and Technology of China, Hefei 230026, PR China.
² Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China.
³ Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China. Electronic address: tanying@ciac.ac.cn.
⁴ Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China. Electronic address: xukun@ciac.ac.cn.

PMID: 30898598
DOI: 10.1016/j.ijbiomac.2019.03.107

Abstract

Inverse Pickering emulsions stabilized by naturally derived particles are of interesting during the past decade. In this study, starch-based nanoparticles were used as a particulate emulsifier to stabilize a w/o Pickering emulsion. The effects of particle concentration and oil volume fraction on the emulsion type and stability were investigated in detail. Catastrophic phase inversion from o/w to w/o emulsions occurred at a volume fraction of oil of 0.3-0.4, without altering the particle wettability. Further, a linear relation existed between the average droplet diameter and total amounts of starch-based nanoparticles. The obtained starch-based nanoparticles also served as a Pickering stabilizer to conduct a w/o Pickering polymerization. Raspberry-like thermoresponsive starch-poly(N-isopropyl acrylamide) nanocomposites with a well-defined structure were synthesized.

Keywords: Inverse emulsion; Nanoparticles; Pickering emulsion; Pickering polymerization; Poly(N-isopropyl acrylamide); Starch.

MeSH terms

Acrylamides / chemistry*
Emulsifying Agents / chemistry*
Emulsions / chemistry*
Nanoparticles / chemistry*
Nanoparticles / ultrastructure
Polymerization
Spectrum Analysis
Starch / chemistry*
Water / chemistry*

Substances

Acrylamides
Emulsifying Agents
Emulsions
Water
Starch
N-isopropylacrylamide