Novel fabrication of stable Pickering emulsion and latex by hollow silica nanoparticles

Yan Bao; Yuanxia Zhang; Pan Liu; Jianzhong Ma; Wenbo Zhang; Chao Liu; Demetra Simion

doi:10.1016/j.jcis.2019.06.008

Novel fabrication of stable Pickering emulsion and latex by hollow silica nanoparticles

J Colloid Interface Sci. 2019 Oct 1:553:83-90. doi: 10.1016/j.jcis.2019.06.008. Epub 2019 Jun 4.

Authors

Yan Bao¹, Yuanxia Zhang², Pan Liu³, Jianzhong Ma⁴, Wenbo Zhang⁵, Chao Liu⁶, Demetra Simion⁷

Affiliations

¹ College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, PR China; Shaanxi Research Institute of Agricultural Products Processing Technology, Xi'an 710021, PR China. Electronic address: baoyan@sust.edu.cn.
² College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, PR China; National Demonstration Center for Experimental Light Chemistry Engineering China.Education, Shaanxi University of Science and Technology, Xi'an 710021, PR China. Electronic address: BS1701005@sust.edu.cn.
³ College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, PR China; National Demonstration Center for Experimental Light Chemistry Engineering China.Education, Shaanxi University of Science and Technology, Xi'an 710021, PR China.
⁴ College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, PR China; Shaanxi Research Institute of Agricultural Products Processing Technology, Xi'an 710021, PR China. Electronic address: majz@sust.edu.cn.
⁵ Shaanxi Collaborative Innovation Center of Industrial Auxiliary Chemistry & Technology, Shaanxi University of Science & Technology, Xi'an 710021, PR China. Electronic address: zhangwenbo@sust.edu.cn.
⁶ Shaanxi Collaborative Innovation Center of Industrial Auxiliary Chemistry & Technology, Shaanxi University of Science & Technology, Xi'an 710021, PR China. Electronic address: liuchaohg@sust.edu.cn.
⁷ The Research Development National Institute for Textiles and Leather, Division Leather and Footwear Research Institute, 93 Street Ion Minulescu, 031215 Bucharest, Romania.

PMID: 31195217
DOI: 10.1016/j.jcis.2019.06.008

Abstract

Hypothesis: In conventional Pickering emulsions, solid nanoparticles are usually employed as stabilizers. However, hollow nanoparticles are desirable candidates for the stabilization of Pickering emulsion and latex due to their strong adsorption property and low density stemming from the hollow cavity structure.

Experiments: In order to investigate the superiority of hollow silica nanoparticles in stabilizing emulsions, Pickering emulsion and polyacrylate latex were fabricated using hollow silica nanoparticles as stabilizers. For comparison purposes, oil/water emulsions and polyacrylate latices were prepared using sodium dodecylsulfate or silica nanoparticles as stabilizers, also they were prepared without the stabilizer.

Findings: The results showed that the stabilizing capability of hollow silica particles was comparable to surfactants and superior to conventional silica nanoparticles. Irreversible adsorption and effective mechanical barrier of hollow silica nanoparticles at the surface of latex particles were responsible for the outstanding emulsifying property and stability. Furthermore, the low density of hollow silica nanoparticles imparted by their cavity structure was the primary reason for the fabrication of stable Pickering emulsion and latex. This work broadens our understanding of the factors influencing the stability of Pickering emulsion and latex.

Keywords: Cavity structure; Hollow silica; Low density; Pickering emulsion; Polyacrylate latex; Stability.